CN215219040U - Test power supply and power diode component test system - Google Patents
Test power supply and power diode component test system Download PDFInfo
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- CN215219040U CN215219040U CN202120685490.9U CN202120685490U CN215219040U CN 215219040 U CN215219040 U CN 215219040U CN 202120685490 U CN202120685490 U CN 202120685490U CN 215219040 U CN215219040 U CN 215219040U
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Abstract
The utility model discloses a test power supply and power diode subassembly test system, one of them test power supply includes: a commutation module capable of outputting a periodic current and/or a periodic voltage; the electric stress module can output voltage with a preset magnitude and/or output current with a preset magnitude; the switching module is used for controlling the conduction or the disconnection between the commutation module and the power component to be tested and between the electrical stress module and the power component to be tested. One of the current conversion module and the electric stress module is controlled to be conducted with the element to be tested through the switching module, and the current conversion module or the electric stress module can be selected to be used for testing according to testing requirements.
Description
Technical Field
The utility model relates to a power component test platform, in particular to test power supply and power diode subassembly test system.
Background
Power diode assemblies are often used in power facilities, such as converter stations, and the voltage stress and the current stress are large when the power diode assemblies work, and the influence of consequences generated by faults of the power facilities is large, so that the reliability requirement on the power diode assemblies is high, and further the performance requirement on the power diode assemblies is strict.
In order to know the performance of the power diode assembly, a test power supply generates a voltage and a current to drive the power diode assembly to operate, so as to facilitate the test of the power diode assembly. However, existing power supplies are not capable of simulating the actual performance of the power diode assemblies for sustained periodic currents, abnormally large currents or high voltages, respectively, in the operating environment of the converter station.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a test power supply, it produces electric current and/or voltage under the current conversion station operational environment through current conversion module analog output, also can switch through electric stress module output and produce predetermined electric current and/or voltage to satisfy the test demand.
The utility model also provides a test power supply and power diode subassembly test system, it can simulate converter station operational environment and test the power diode subassembly, also can switch the performance of the electric current of output preset size and/or voltage with test power diode subassembly under unusual heavy current, the high voltage environment.
According to the utility model discloses a test power supply of first aspect embodiment includes: a commutation module capable of generating a periodic current and/or a periodic voltage; the electric stress module can output voltage with a preset magnitude and/or output current with a preset magnitude; the switching module is used for controlling the conduction or the disconnection between the commutation module and the power component to be tested and between the electrical stress module and the power component to be tested.
According to the utility model discloses test power supply has following beneficial effect at least: the converter module outputs and generates periodic current and/or voltage to drive the power component to be tested to work, so that the effect of simulating the working environment of the converter station is achieved. The electric stress module outputs current and/or voltage with preset magnitude to simulate the condition of abnormal large current and/or high voltage, and the working performance of the power assembly to be detected under the condition of abnormal large current and/or high voltage can be conveniently obtained through subsequent detection. In addition, one of the current conversion module and the electrical stress module is controlled to be conducted with the element to be tested through the switching module, so that the current conversion module or the electrical stress module can be selected to be used for testing according to testing requirements, and the requirements are met.
According to the utility model discloses a some embodiments, the change of current module is including the first filtering unit, first vary voltage unit, first rectification unit and the contravariant unit that connect gradually, first rectification unit with the switching module is connected.
According to some embodiments of the utility model, the current conversion module still includes the reactor, first rectification unit passes through the reactor with the contravariant unit is connected.
According to the utility model discloses a some embodiments, first vary voltage unit is the three-winding transformer, the output of three-winding transformer with the input of first rectifier unit is connected, the first input of three-winding transformer can be connected with the external power supply source, the second input of three-winding transformer with the output of contravariant unit is connected.
According to the utility model discloses a some embodiments, the electric stress module includes voltage module and current module, voltage module and current module all with switching module's input is connected, switching module can control between voltage module and the power component that awaits measuring and switch on or turn-off between current module and the power component that awaits measuring, voltage module can export the voltage of predetermineeing the size, current module can export the electric current of predetermineeing the size.
According to some embodiments of the utility model, the voltage module is including the second filtering unit, second vary voltage unit, second rectifier unit and the oscillation unit that connect gradually, the oscillation unit with switch the connection of module.
According to some embodiments of the invention, the oscillating unit comprises a capacitor C21, a capacitor C23, a thyristor ZJ22, an inductor L22, an inductor L23, a resistor R20, and a resistor R23;
one end of the resistor R20 is connected with the second rectifying unit, and the other end of the resistor R20 is respectively connected with one end of a thyristor ZJ22 and one end of the capacitor C21;
the other end of the thyristor ZJ22 is connected with one end of the inductor L22;
the other end of the inductor L22 is connected with one end of the resistor R23 and one end of the capacitor C23;
the other end of the resistor R23 is connected with the switching module through the inductor L23;
the other end of the capacitor C21 and the other end of the capacitor C23 are both connected with the second rectifying unit.
According to the utility model discloses a some embodiments, the current module includes at least a set of current component and inductance, the current component is including the third voltage transformation unit, third rectifier unit, switch element and the energy storage electric capacity that connect gradually, the inductance with the energy storage electric capacity is connected, the inductance with the switching module is connected.
According to some embodiments of the utility model, switch the module and include control unit, first thyristor assembly, second thyristor assembly and third thyristor assembly, control unit respectively with the control end of first thyristor assembly the control end of second thyristor assembly and the control end of third thyristor assembly is connected, change of current module with first thyristor assembly connects, voltage module with second thyristor assembly connects, current module with third thyristor assembly connects, first thyristor assembly second thyristor assembly and third thyristor assembly all can be connected with the power component that awaits measuring.
According to some embodiments of the present invention, a power diode module testing system according to embodiments of the second aspect of the present invention, including a testing power source as described above, further includes a power diode module and a detection module, the switching module is connected to the power diode module, and the detection module is connected to the power diode module to detect the current and/or voltage of the power diode module.
According to the utility model discloses power diode subassembly test system has following beneficial effect at least: the switching module is used for controlling the conduction or the disconnection between the current conversion module or the electric stress module and the power diode assembly, when the current conversion module is conducted with the power diode assembly, the current conversion module generates periodic current and/or periodic voltage to be applied to the power diode assembly, the working environment of the converter station is simulated, the effect of the power diode assembly is tested, the current and/or the voltage of the power diode assembly are detected through the detection module, and the performance of the power diode assembly in the working process of the converter station can be obtained. When the electric stress module is conducted with the power diode assembly, the electric stress module generates current and/or voltage with preset magnitude and applies the current and/or voltage to the power diode assembly, the conditions of high voltage and abnormal large current are simulated, and performance of the power diode assembly in the high-voltage and abnormal large-current environment can be obtained through the detection module. Therefore, the performance of the power diode assembly in actual work can be tested more comprehensively, and the use requirement is met.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a circuit diagram of one embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if there are first and second descriptions for distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 1, a test power supply according to an embodiment of the present invention includes: a commutation module 100, the commutation module 100 being capable of generating a periodic current and/or a periodic voltage; the electric stress module 200, the electric stress module 200 can output a voltage with a preset magnitude and/or output a current with a preset magnitude; the switching module 300, the commutation module 100 and the electrical stress module 200 are all connected to an input end of the switching module 300, an output end of the switching module 300 can be connected to a power component to be tested, and the switching module 300 can control the conduction or the disconnection between the commutation module 100 and the power component to be tested and between the electrical stress module 200 and the power component to be tested.
The converter module 100 outputs a generated periodic current and/or voltage to drive the power component to be tested to work, so as to achieve the effect of simulating the working environment of the converter station. The electrical stress module 200 outputs a current and/or a voltage with a preset magnitude to simulate the condition of abnormal large current and/or high voltage, so that the subsequent detection can be conveniently carried out to obtain the working performance of the power component to be detected under the condition of abnormal large current and/or high voltage. In addition, one of the commutation module 100 and the electrical stress module 200 is controlled to be conducted with the device to be tested through the switching module 300, so that the commutation module 100 or the electrical stress module 200 can be selected to be used for testing according to the testing requirement, and the requirement is met.
Referring to fig. 1, in some embodiments of the present invention, the commutation module 100 includes a first filtering unit 110, a first transforming unit 120, a first rectifying unit 130, and an inverting unit 140 connected in sequence, and the first rectifying unit 130 is connected to the switching module 300.
The first transforming unit 120 can be connected with a power supply source such as a mains supply to obtain an input voltage, the input voltage is transmitted to the first rectifying unit 130 after transformation processing, the first rectifying unit 130 is transmitted to the inverting unit 140 after rectification processing, and the inverting unit 140 outputs the voltage after inversion processing, so that the working environment of the converter station can be simulated, and the first rectifying unit 130 can generate a periodic voltage and a periodic current with a certain amplitude when working. The first rectifying unit 130 is connected to the switching module 300, that is, the switching module 300 can control the first rectifying unit 130 to be turned on or off with the power component to be tested, so that when the first rectifying unit 130 is turned on with the power component to be tested, the periodic voltage and the periodic current generated by the first rectifying unit 130 are applied to the power component to be tested, thereby facilitating the simulation of the working environment of the converter station to test the power component.
By arranging the first filtering unit 110, harmonic components in absorbed voltage and current can be filtered, and the requirement of power grid injection is met.
The first filtering unit 110 may be implemented by including one or more LC circuits, and may also be implemented by other common filtering circuits. The first transforming unit 120 may be an embodiment of a common three-phase transformer or the like. The first rectifying unit 130 may be an embodiment of a circuit or a device having a rectifying effect, such as a common full-bridge rectifying circuit. The inverter unit 140 may be an embodiment of a common inverter circuit or device.
Referring to fig. 1, in some embodiments of the present invention, the commutation module 100 further includes a reactor 150, and the first rectifying unit 130 is connected to the inverting unit 140 through the reactor 150.
The first rectifying unit 130 is connected to the inverting unit 140 through the reactor 150, and the reactor 150 can filter out ripples in the dc current output by the first rectifying unit 130, which is beneficial to making the current output by the converter module 100 closer to the working environment of the actual converter station.
Referring to fig. 1, in some embodiments of the present invention, the first transforming unit 120 is a three-winding transformer, an output end of the three-winding transformer is connected to an input end of the first rectifying unit 130, a first input end of the three-winding transformer can be connected to an external power supply, and a second input end of the three-winding transformer is connected to an output end of the inverting unit 140.
The three-winding transformer is used, an external power supply such as commercial power is input into a first input end of the three-winding transformer, alternating current is generated from an output end of the inversion unit 140 after transformation, rectification and inversion processing, and the output end of the inversion unit 140 is connected with a second input end of the three-winding transformer, so that the alternating current output by the inversion unit 140 is input into the three-winding transformer again, the effect of energy feedback can be realized, the simulation of the working environment of the converter station is facilitated, the loss of electric energy is reduced, the energy is saved, and the efficiency is improved.
Referring to fig. 1, in some embodiments of the present invention, the electrical stress module 200 includes a voltage module 210 and a current module 220, the voltage module 210 and the current module 220 are both connected to the input end of the switching module 300, the switching module 300 can control the on/off between the voltage module 210 and the power component to be tested and between the current module 220 and the power component to be tested, the voltage module 210 can output a voltage of a predetermined magnitude, and the current module 220 can output a current of a predetermined magnitude.
The voltage module 210 generates a voltage with a preset magnitude and applies the voltage to the power component to be tested, so that the working performance of the power component to be tested under a high-voltage condition can be tested; in addition, the current module 220 generates a current with a preset magnitude and applies the current to the power component to be tested, so that the working performance of a large current flowing through the power component to be tested under an abnormal condition can be simulated. The switching module 300 controls and selects the commutation module 100, the voltage module 210 or the current module 220 to be conducted with the power component to be tested, so that the working performance of the power component to be tested under different conditions can be tested, and the performance of the power component to be tested can be tested more comprehensively.
Referring to fig. 1, in some embodiments of the present invention, the voltage module 210 includes a second filtering unit 211, a second transforming unit 212, a second rectifying unit 213 and an oscillating unit 214 connected in sequence, and the oscillating unit 214 is connected to an input end of the switching module 300.
The input end of the second transforming unit 212 can be connected to a power supply such as a mains supply, the input ac power is transformed into a dc power after transformation and rectification, and then is transmitted to the oscillating unit 214, the oscillating unit 214 forms a periodic high voltage through voltage oscillation, and when the switching module 300 controls the oscillating unit 214 to be conducted with the power component to be tested, the high voltage condition of the power component to be tested can be tested.
The second filtering unit 211 can filter out harmonic components of the absorbed voltage and current, and is beneficial to reducing the influence on an external power grid.
The second filtering unit 211 may be implemented by including one or more LC circuits, and may also be implemented by other common filtering circuits. The second transforming unit 212 may be an embodiment of a common three-phase transformer or the like. The second rectification unit 213 may be an embodiment of a common full bridge rectification circuit, a rectifier, or other circuits or devices having a rectification effect. The oscillating unit 214 may be an embodiment including a switching valve in cooperation with a CLC oscillating circuit or an LC oscillating circuit, etc., which can achieve a voltage oscillating effect.
Referring to fig. 1, in some embodiments of the present invention, the oscillating unit 214 includes a capacitor C21, a capacitor C23, a thyristor ZJ22, an inductor L22, an inductor L23, a resistor R20, and a resistor R23;
one end of the resistor R20 is connected to the second rectifying unit 213, and the other end of the resistor R20 is connected to one end of the thyristor ZJ22 and one end of the capacitor C21, respectively;
the other end of the thyristor ZJ22 is connected with one end of an inductor L22;
the other end of the inductor L22 is connected to one end of the resistor R23 and one end of the capacitor C23;
the other end of the resistor R23 is connected with the switching module 300 through an inductor L23;
the other end of the capacitor C21 and the other end of the capacitor C23 are both connected to the second rectifying unit 213.
The second rectifying unit 213 outputs a direct current to the CLC oscillating circuit composed of a capacitor C21, a capacitor C23, an inductor L22, and a thyristor ZJ22, and the CLC oscillating circuit generates a high voltage, and when the switching module 300 is turned on, the CLC oscillating circuit applies the high voltage to the power component to be tested through a resistor R23 and an inductor L23, so as to achieve a high voltage test effect.
Referring to fig. 1, in some embodiments of the present invention, the current module 220 includes at least one set of current components 221 and an inductor 222, the current components 221 include a third transforming unit 223, a third rectifying unit 224, a switching unit 225 and an energy storage capacitor 226, which are connected in sequence, the inductor 222 is connected to the energy storage capacitor 226, and the inductor 222 is connected to the switching module 300.
The input end of the third transforming unit 223 is connected to an external power supply such as the mains supply, and forms a direct current after transformation and rectification processing of the third rectifying unit 224, when the switching unit 225 is closed, the direct current charges the energy storage capacitor 226, and the energy storage capacitor 226 stores electric energy; when the switch unit 225 is turned off and the switching unit controls the energy storage capacitor 226 to be turned on with the power device to be tested, the energy storage capacitor 226 releases electric energy to form a current flowing to the power device to be tested, so as to test the power device to be tested. Meanwhile, the energy storage capacitor 226 is connected with the inductor 222, so that the output current oscillates, and the condition in practical use is better met.
When the switching unit 225 is just closed, an excessive current may be generated in a loop formed by the third rectifying unit 224, the switching unit, and the storage capacitor 226 according to the characteristics of the storage capacitor 226. In this regard, the current assembly 221 further includes a current limiting resistor connected to the energy storage capacitor 226 to limit the current in the loop and prevent the component from being damaged due to the excessive current.
In some embodiments of the present invention, when the current assemblies 221 have multiple sets, each set of current assemblies 221 further includes a sub-switch unit 227, the energy storage capacitors 226 of different current assemblies 221 are connected in parallel and then connected to the inductor 222, and the inductor 222 is connected to the energy storage capacitors 226 through the sub-switch units 227 of each set of current assemblies 221. With the structure, the energy storage capacitors 226 in the same group of current components 221 can be controlled to release electric energy by controlling the conduction of the sub-switch units 227, and the output voltage of the third transformation unit 223 in different current components 221 and the capacity of the energy storage capacitor 226 can be different, so that currents with different sizes can be injected into the power component to be tested; or more than two sub-switch units 227 are controlled to be conducted simultaneously, so that currents output by the energy storage capacitors 226 of different groups are overlapped to form larger current flowing to the power component to be tested, and the condition of abnormal large current is simulated. Therefore, by arranging the sub-switch unit 227, the current injected into the power component to be tested can be flexibly adjusted according to the test requirement, so that the use is more convenient.
In addition, the energy storage capacitors 226 in the multiple branches are connected in parallel and then connected with the inductor 222 of the trunk, so that an inductor does not need to be configured for each current component 221, which is beneficial to saving the device cost and reducing the overall size.
The sub-switch unit 227 may be a thyristor or other common embodiments with a switching function.
The third transforming unit 223 is implemented as a common single-phase transformer. The third rectifying unit 224 may be an implementation of a common full-bridge rectifying circuit, a rectifier, or other circuits or devices having a rectifying effect. The energy storage capacitor 226 may be an embodiment of a device or circuit having an energy storage function, such as a capacitor.
Referring to fig. 1, in some embodiments of the present invention, the switching module 300 includes a control unit, a first thyristor assembly 310, a second thyristor assembly 320 and a third thyristor assembly 330, the control unit is respectively connected to a control terminal of the first thyristor assembly 310, a control terminal of the second thyristor assembly 320 and a control terminal of the third thyristor assembly 330, the commutation module 100 is connected to the first thyristor assembly 310, the voltage module 210 is connected to the second thyristor assembly 320, the current module 220 is connected to the third thyristor assembly 330, and the first thyristor assembly 310, the second thyristor assembly 320 and the third thyristor assembly 330 can be connected to the power device to be tested.
The control unit controls the conduction of the first thyristor assembly 310, the second thyristor assembly 320 and the third thyristor assembly 330, whether the commutation module 100, the voltage module 210 and the current module 220 are conducted with the power assembly to be tested or not can be correspondingly selected, the structure is simple, the implementation is convenient, and the thyristor assembly is suitable for a large-current and large-power working environment and meets the use requirement.
The first thyristor assembly 310 and the third thyristor assembly 330 may be implemented by a single thyristor, or may be implemented by the thyristor and auxiliary components such as a heat dissipation component and an absorption component cooperating with the thyristor. Since the voltage output by the voltage module 210 is high, the second thyristor assembly 320 also needs to perform an isolation function, and the second thyristor assembly 320 needs to include an embodiment of a thyristor and an auxiliary component.
In the case of multiple sets of current elements 221, i.e. when there is a sub-switching unit 227, the control unit is connected to the control terminal of the sub-switching unit 227 to control the sub-switching unit 227 to be turned on.
The control unit may be an implementation manner including a single chip, a PLC, an embedded chip, and other devices with control functions, and cooperating with the thyristor device driving circuit, so as to control the first thyristor device 310, the second thyristor device 320, and the third thyristor device 330 to be turned on.
Referring to fig. 1, in some embodiments of the present invention, the first thyristor assembly 310, i.e. the thyristor ZJ13, is connected to the first rectifying unit 130, and the voltage periodically varied by the first rectifying unit 130 can drive the thyristor ZJ13 to turn off. The second thyristor assembly 320, namely the thyristor ZJ23 is connected with the inductor L23, the thyristor ZJ23 is turned on, the high voltage of the capacitor C23 is applied to the power assembly to be tested, so that the power assembly to be tested is at a high potential, at the moment, the thyristor ZJ22 is turned on reversely, so that the capacitor C23 releases electric energy to reduce the potential, further, the potential of one end, close to the power assembly to be tested, of the thyristor ZJ23 is higher than the potential of the other end, close to the capacitor C23, namely, the thyristor ZJ23 is subjected to reverse voltage, and the thyristor ZJ23 is turned off. The third thyristor assembly 330, i.e. the thyristor ZJ33, is connected to the inductor 222, the energy storage capacitor 226 and the inductor 222 form an LC circuit, the capacitor generates oscillation after releasing current, and the energy storage capacitor 226 generates reverse voltage to turn off the thyristor ZJ33 during oscillation. Similarly, the sub-switch unit 227, i.e. the thyristor ZJ3, is also turned off by the reverse voltage generated by the energy storage capacitor 226. Therefore, the first thyristor component 310, the second thyristor component 320, the third thyristor component 330 and the thyristor ZJ3 can be automatically turned off after being controlled by the control unit to be turned on, and the working characteristics of the thyristor can be met.
According to the utility model discloses a power diode subassembly test system of second aspect embodiment, including foretell a test power supply, still include power diode subassembly 400 and detection module, switch module 300 and be connected with power diode subassembly 400, detection module is connected with power diode subassembly 400 in order to detect power diode subassembly 400's electric current and/or voltage.
The switching module 300 is used for controlling the conduction or the disconnection between the converter module 100 or the electrical stress module 200 and the power diode assembly 400, when the converter module 100 is conducted with the power diode assembly 400, the converter module 100 generates periodic current and/or periodic voltage to be applied to the power diode assembly 400, the working environment of the converter station is simulated, the effect of the power diode assembly 400 is tested, the current and/or the voltage of the power diode assembly 400 is detected through the detection module, and the performance of the power diode assembly 400 during the working of the converter station can be obtained. When the electrical stress module 200 is conducted with the power diode assembly 400, the electrical stress module 200 generates a current and/or a voltage with a preset magnitude to be applied to the power diode assembly 400, so that the conditions of high voltage and abnormal large current can be simulated, and the performance of the power diode assembly 400 in the high-voltage and abnormal large-current environment can be obtained through the detection module. Therefore, the performance of the power diode assembly 400 in actual operation can be tested more comprehensively, and the use requirement can be met.
The detection module may be an implementation that includes a current hall sensor, a voltage transformer, a current transformer, or a common voltage detection circuit, a current detection circuit, etc. and is capable of detecting a voltage and a current of the power diode assembly 400, so as to know a state of the power diode assembly 400 during a test.
In some embodiments of the present invention, the power diode assembly 400 may be an embodiment including a plurality of power diodes, the power diodes are connected in series and then connected with other auxiliary components to form a diode valve, and the diode valve is respectively connected with the switching module 300 and the detection module to test the diode valve to meet the test requirement.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (10)
1. A test power supply, comprising:
a commutation module (100), said commutation module (100) being capable of generating a periodic current and/or a periodic voltage;
an electrical stress module (200), the electrical stress module (200) being capable of outputting a voltage of a predetermined magnitude and/or outputting a current of a predetermined magnitude;
the power component testing device comprises a switching module (300), wherein the commutation module (100) and the electrical stress module (200) are connected with the input end of the switching module (300), the output end of the switching module (300) can be connected with a power component to be tested, and the switching module (300) can control the commutation module (100) to be connected with the power component to be tested and the electrical stress module (200) to be connected with the power component to be tested.
2. A test power supply as claimed in claim 1, wherein: the commutation module (100) comprises a first filtering unit (110), a first voltage transformation unit (120), a first rectification unit (130) and an inversion unit (140) which are connected in sequence, wherein the first rectification unit (130) is connected with the switching module (300).
3. A test power supply as claimed in claim 2, wherein: the commutation module (100) further comprises a reactor (150), and the first rectifying unit (130) is connected with the inverting unit (140) through the reactor (150).
4. A test power supply as claimed in claim 2, wherein: the first transformation unit (120) is a three-winding transformer, the output end of the three-winding transformer is connected with the input end of the first rectification unit (130), the first input end of the three-winding transformer can be connected with an external power supply, and the second input end of the three-winding transformer is connected with the output end of the inversion unit (140).
5. A test power supply as claimed in claim 1, wherein: electric stress module (200) include voltage module (210) and current module (220), voltage module (210) and current module (220) all with the input of switching module (300) is connected, switching module (300) can control between voltage module (210) and the power component that awaits measuring and between current module (220) and the power component that awaits measuring switch on or switch off, voltage module (210) can output the voltage of predetermineeing the size, current module (220) can output the electric current of predetermineeing the size.
6. A test power supply as claimed in claim 5, wherein: the voltage module (210) comprises a second filtering unit (211), a second voltage transformation unit (212), a second rectification unit (213) and an oscillation unit (214) which are sequentially connected, and the oscillation unit (214) is connected with the switching module (300).
7. A test power supply as claimed in claim 6, wherein: the oscillation unit (214) comprises a capacitor C21, a capacitor C23, a thyristor ZJ22, an inductor L22, an inductor L23, a resistor R20 and a resistor R23;
one end of the resistor R20 is connected with the second rectifying unit (213), and the other end of the resistor R20 is respectively connected with one end of a thyristor ZJ22 and one end of the capacitor C21;
the other end of the thyristor ZJ22 is connected with one end of the inductor L22;
the other end of the inductor L22 is connected with one end of the resistor R23 and one end of the capacitor C23;
the other end of the resistor R23 is connected with the switching module (300) through the inductor L23;
the other end of the capacitor C21 and the other end of the capacitor C23 are both connected with the second rectifying unit (213).
8. A test power supply as claimed in claim 5, wherein: the current module (220) comprises at least one group of current components (221) and an inductor (222), the current components (221) comprise a third transformation unit (223), a third rectification unit (224), a switch unit (225) and an energy storage capacitor (226) which are sequentially connected, the inductor (222) is connected with the energy storage capacitor (226), and the inductor (222) is connected with the switching module (300).
9. A test power supply as claimed in claim 5, wherein: the switching module (300) comprises a control unit, a first thyristor assembly (310), a second thyristor assembly (320) and a third thyristor assembly (330), wherein the control unit is respectively connected with a control end of the first thyristor assembly (310), a control end of the second thyristor assembly (320) and a control end of the third thyristor assembly (330), the commutation module (100) is connected with the first thyristor assembly (310), the voltage module (210) is connected with the second thyristor assembly (320), the current module (220) is connected with the third thyristor assembly (330), and the first thyristor assembly (310), the second thyristor assembly (320) and the third thyristor assembly (330) can be connected with a power assembly to be tested.
10. Power diode subassembly test system, its characterized in that: a test power supply comprising a power diode assembly (400) according to any of claims 1 to 9, and a detection module, a switching module (300) being connected to said power diode assembly (400), and said detection module being connected to said power diode assembly (400) for detecting a current and/or a voltage of said power diode assembly (400).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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