CN110460248B - Module power supply circuit for realizing high-voltage isolation - Google Patents

Module power supply circuit for realizing high-voltage isolation Download PDF

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Publication number
CN110460248B
CN110460248B CN201910782726.8A CN201910782726A CN110460248B CN 110460248 B CN110460248 B CN 110460248B CN 201910782726 A CN201910782726 A CN 201910782726A CN 110460248 B CN110460248 B CN 110460248B
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resistor
diode
capacitor
power supply
auxiliary
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CN110460248A (en
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陈安清
杨宇帆
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Sichuan Ganhua Power Technology Co ltd
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Sichuan Ganhua Power Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention discloses a module power supply circuit for realizing high-voltage isolation, which comprises a main power supply circuit, a control circuit and an auxiliary power supply circuit, wherein the main power supply circuit is connected with the control circuit; the main power supply circuit comprises a plurality of main transformers connected in series; the auxiliary power supply circuit comprises a plurality of auxiliary transformers connected in series; the control circuit comprises a plurality of photoelectric couplers which are connected in series, and a direct current power supply is connected between the photoelectric couplers which are connected in series for supplying power. According to the invention, the voltage isolation of the module power supply is improved by adopting the multistage transformer and the photoelectric coupler, so that the module power supply can meet the requirement of high voltage isolation of more than or equal to 10KVac in a humid application environment.

Description

Module power supply circuit for realizing high-voltage isolation
Technical Field
The invention relates to the field of power supplies, in particular to a module power supply circuit for realizing high-voltage isolation.
Background
Because of compact structure, limited length, width and height dimensions, the isolation voltage between primary and secondary is usually low, and is generally 1.5KVac, 2.5KVac, 3KVac, 3.5KVac and other common orders of magnitude, so that the requirement of high-voltage isolation of more than or equal to 10KVac in a humid application environment is difficult to meet at present.
There are also designers trying to meet the requirement of high isolation voltage by increasing the primary and secondary insulation voltage of the transformer and adopting a high isolation voltage optocoupler as a voltage feedback device, however, the thickness of the standardized module power supply is often less than 15mm, and is generally 10mm, 12.7mm, 13mm, 15mm and other thickness dimensions, the primary stage of the transformer and the distance between the winding and the magnetic core are very limited, and the insulation voltage of the conventional optocoupler is often less than or equal to 5KV, and the size of the optocoupler with high isolation voltage cannot be designed and assembled inside the module power supply at all, so that the high voltage isolation module power supply meeting the humid application environment of more than or equal to 10KVac is not realized for a long time.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: in order to solve the problems, a module power supply circuit for realizing high-voltage isolation is provided.
The technical scheme adopted by the invention is as follows:
A module power circuit for realizing high-voltage isolation comprises a main power circuit, a control circuit and an auxiliary power circuit; the main power supply circuit comprises a plurality of main transformers connected in series; the auxiliary power supply circuit comprises a plurality of auxiliary transformers connected in series; the control circuit comprises a plurality of photoelectric couplers which are connected in series, and a direct current power supply is connected between the photoelectric couplers which are connected in series for supplying power.
In one embodiment, the main power circuit comprises a main transformer T1, a main transformer T2, a rectifier bridge circuit and a filter circuit; the main transformer T1 is connected in series with the main transformer T2; the primary side of the main transformer T1 is connected with a high-frequency switch circuit; the secondary side of the main transformer T2 is connected with a load through a rectifier bridge circuit and a filter circuit in sequence.
In one embodiment, the rectifier bridge circuit includes a diode D1, a diode D2, a diode D3, and a diode D4; the anode of the diode D1 is connected with the cathode of the diode D3; the anode of the diode D2 is connected with the cathode of the diode D4; an electrical connection point between the anode of the diode D1 and the cathode of the diode D3, and an electrical connection point between the anode of the diode D2 and the cathode of the diode D4 are respectively connected with two ends of the secondary side of the main transformer T2; the cathode of the diode D1 and the cathode of the diode D2 are both connected with a filter circuit; the anode of diode D3 and the anode of diode D4 are grounded.
In one embodiment, the filter circuit includes a capacitor C1, a capacitor C2, and an inductance L1; one end of the capacitor C1 and one end of the capacitor C2 are respectively connected to two ends of the inductor L1, and the other end of the capacitor C is grounded; the electrical connection point between the capacitor C1 and the inductor L1 is connected with the cathode of the diode D1 and the cathode of the diode D2; the electrical connection point between the inductor L1 and the capacitor C2 is used as a positive input end of the load, and the other end of the capacitor C2 is used as a negative input end of the load.
In one embodiment, the control circuit includes: the photoelectric coupler U1, the photoelectric coupler U2, the voltage comparator U3, the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8, the resistor R9, the resistor R10, the resistor R11, the resistor R12, the resistor R13, the resistor R14, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6;
the resistor R10, the resistor R11, the resistor R12, the resistor R13 and the resistor R14 are sequentially connected in series, the resistor R7, the capacitor C6, the resistor R8 and the resistor R9 are sequentially connected in series, and an electrical connection point between the resistor R7 and the resistor R10 is connected with a positive input end of a load; the electrical connection point between the resistor R8 and the resistor R9 is connected with the electrical connection point between the resistor R13 and the resistor R14; one end of the resistor R9 and one end of the resistor R14 are connected with the negative input end of the load; the electrical connection point between the capacitor C6 and the resistor R8 is connected with the negative input end of the voltage comparator U3, and is connected with the output end of the voltage comparator U3 through the resistor R6 and the capacitor C5 in sequence; the positive input end of the voltage comparator U3 is connected with the VREF end; the output end of the voltage comparator U3 is connected with the VCC_S end of the auxiliary power supply circuit through a resistor R5 and a resistor R4 in sequence; the light emitting diode of the photoelectric coupler U2 is connected in parallel with the two ends of the resistor R4; one end of a phototriode of the photoelectric coupler U2 is connected with the VCC_M end of the auxiliary power supply circuit, and the other end of the phototriode is grounded through a resistor R2 and a resistor R3 in sequence; the light emitting diode of the photoelectric coupler U1 is connected in parallel with two ends of the resistor R3; one end of a phototriode of the photoelectric coupler U1 is connected with a high-frequency switch circuit, and the other end of the phototriode is grounded; the resistor C4 is connected in parallel with two ends of the phototriode of the photoelectric coupler U1; the capacitor C3 and the resistor R1 are connected in series and then connected in parallel to two ends of the phototriode of the photoelectric coupler U1.
In one embodiment, the auxiliary power circuit includes an auxiliary transformer T3, an auxiliary transformer T4, a MOS drive transistor Q1, a capacitor C7, a capacitor C8, a capacitor C9, a diode D5, a diode D6, a diode D7, and a resistor R15; the primary side of the auxiliary transformer T3 comprises a first tap and a second tap; one end of the first tap is connected with a voltage input end, and the other end of the first tap is connected with the drain electrode of the MOS driving transistor Q1; one end of the second tap is grounded through the anode, the cathode and the capacitor C7 of the diode D5 in sequence, and the other end of the second tap is grounded; the grid electrode of the MOS driving transistor Q1 is connected with an auxiliary power supply control circuit, and the source electrode is grounded; the secondary side of the auxiliary transformer T3 is connected with the primary side of the auxiliary transformer T4; a diode D6 and a capacitor C8 are connected in parallel between the secondary side of the auxiliary transformer T3 and the primary side of the auxiliary transformer T4; the diode D7 and the capacitor C9 are connected in parallel at two ends of the secondary side of the auxiliary transformer T4.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
The main power supply circuit comprises a plurality of main transformers connected in series; the control circuit comprises a plurality of photocouplers which are connected in series; the auxiliary power supply circuit comprises a plurality of auxiliary transformers which are connected in series, and improves the voltage isolation of the module power supply by adopting a multi-stage transformer and a photoelectric coupler, so that the module power supply can meet the requirement of high voltage isolation which is more than or equal to 10KVac in a humid application environment,
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a modular power circuit implementing high voltage isolation of the present invention.
Fig. 2 is a main power circuit diagram of the present invention.
Fig. 3 is a control circuit diagram of the present invention.
Fig. 4 is a circuit diagram of an auxiliary power supply of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
As shown in fig. 1, the module power supply circuit for realizing high-voltage isolation provided by the invention comprises a main power supply circuit, a control circuit and an auxiliary power supply circuit; the main power supply circuit comprises a plurality of main transformers connected in series; the auxiliary power supply circuit comprises a plurality of auxiliary transformers connected in series; the control circuit comprises a plurality of photoelectric couplers which are connected in series, and a direct current power supply is connected between the photoelectric couplers which are connected in series for supplying power.
The features and capabilities of the present invention are described in further detail below in connection with the examples.
Example 1
As shown in fig. 2, in the present embodiment, the main power supply circuit includes a main transformer T1, a main transformer T2, a rectifier bridge circuit, and a filter circuit; the main transformer T1 is connected in series with the main transformer T2; the primary side of the main transformer T1 is connected with a high-frequency switch circuit; the secondary side of the main transformer T2 is connected with a load through a rectifier bridge circuit and a filter circuit in sequence.
In this embodiment, the rectifier bridge circuit includes a diode D1, a diode D2, a diode D3, and a diode D4; the anode of the diode D1 is connected with the cathode of the diode D3; the anode of the diode D2 is connected with the cathode of the diode D4; an electrical connection point between the anode of the diode D1 and the cathode of the diode D3, and an electrical connection point between the anode of the diode D2 and the cathode of the diode D4 are respectively connected with two ends of the secondary side of the main transformer T2; the cathode of the diode D1 and the cathode of the diode D2 are both connected with a filter circuit; the anode of diode D3 and the anode of diode D4 are grounded.
In this embodiment, the filter circuit includes a capacitor C1, a capacitor C2, and an inductor L1; one end of the capacitor C1 and one end of the capacitor C2 are respectively connected to two ends of the inductor L1, and the other end of the capacitor C is grounded; the electrical connection point between the capacitor C1 and the inductor L1 is connected with the cathode of the diode D1 and the cathode of the diode D2; the electrical connection point between the inductor L1 and the capacitor C2 is used as a positive input end of the load, and the other end of the capacitor C2 is used as a negative input end of the load.
The high-frequency switch circuit is a power switch circuit formed by high-frequency switch devices, and can be a full-bridge, a half-bridge, a single-ended circuit and the like, and is driven by PWM signals. The main power supply circuit feeds the high-frequency alternating-current square wave voltage of the high-frequency switch circuit into the main transformer T1 which is connected in series through T1-A and T1-B, and outputs direct-current voltage required by a load through VOUT+ and VOUT-after two-stage isolated coupling formed by the main transformer T1 and the main transformer T2 which are connected in series. The rectifier bridge circuit formed by the diode D1, the diode D2, the diode D3 and the diode D4 rectifies the output voltage, and the filter circuit formed by the capacitor C1, the capacitor C2 and the inductor L1 filters the output voltage. It should be noted that, two-stage isolation coupling using the main transformer T1 and the main transformer T2 in series is an example of the present embodiment, and in practice, a plurality of main transformers may be used in series isolation coupling according to the need in order to further increase the isolation voltage.
As shown in fig. 3, in the present embodiment, the control circuit includes: the photoelectric coupler U1, the photoelectric coupler U2, the voltage comparator U3, the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8, the resistor R9, the resistor R10, the resistor R11, the resistor R12, the resistor R13, the resistor R14, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6;
The resistor R10, the resistor R11, the resistor R12, the resistor R13 and the resistor R14 are sequentially connected in series, the resistor R7, the capacitor C6, the resistor R8 and the resistor R9 are sequentially connected in series, and an electrical connection point between the resistor R7 and the resistor R10 is connected with a positive input end of a load; the electrical connection point between the resistor R8 and the resistor R9 is connected with the electrical connection point between the resistor R13 and the resistor R14; one end of the resistor R9 and one end of the resistor R14 are connected with the negative input end of the load; the electrical connection point between the capacitor C6 and the resistor R8 is connected with the negative input end of the voltage comparator U3, and is connected with the output end of the voltage comparator U3 through the resistor R6 and the capacitor C5 in sequence; the positive input end of the voltage comparator U3 is connected with the VREF end; the output end of the voltage comparator U3 is connected with the VCC_S end of the auxiliary power supply circuit through a resistor R5 and a resistor R4 in sequence; the light emitting diode of the photoelectric coupler U2 is connected in parallel with the two ends of the resistor R4; one end of a phototriode of the photoelectric coupler U2 is connected with a VCC_M end of an auxiliary power circuit, the embodiment adopts the auxiliary power circuit to supply power for a direct current power supply between the photoelectric couplers connected in series, and the other end of the phototriode is grounded through a resistor R2 and a resistor R3 in sequence; the light emitting diode of the photoelectric coupler U1 is connected in parallel with two ends of the resistor R3; one end of a phototriode of the photoelectric coupler U1 is connected with a high-frequency switch circuit, and the other end of the phototriode is grounded; the resistor C4 is connected in parallel with two ends of the phototriode of the photoelectric coupler U1; the capacitor C3 and the resistor R1 are connected in series and then connected in parallel to two ends of the phototriode of the photoelectric coupler U1.
The resistor R10, the resistor R11, the resistor R12, the resistor R13 and the resistor R14 are connected in series to form a voltage dividing circuit, the direct-current voltage required by the output load is fed back to the positive input end of the voltage comparator U3 after being divided, the output impedance of the photoelectric coupler U1 and the output impedance of the photoelectric coupler U2 can be changed through the voltage comparison operation control of the voltage comparator U3, and therefore the instantaneous voltage value of the FB end can be changed, the duty ratio or the switching frequency of PWM driving signals (high-frequency alternating-current square wave voltages) of the high-frequency switching circuit can be adjusted, and finally the stability of the output voltage is realized. The capacitor C3 and the resistor R1, the capacitor C5 and the resistor R6, and the resistor R7 and the capacitor C6 respectively form a voltage feedback loop compensation circuit, so as to eliminate loop oscillation and improve loop dynamic characteristics. It should be noted that, two-stage isolation coupling using the photocoupler U1 and the photocoupler U2 connected in series is an example of the present embodiment, and in practice, in order to further increase the isolation voltage, a plurality of photocouplers may be connected in series for isolation coupling as required.
As shown in fig. 4, in the present embodiment, the auxiliary power supply circuit includes an auxiliary transformer T3, an auxiliary transformer T4, a MOS driving transistor Q1, a capacitor C7, a capacitor C8, a capacitor C9, a diode D5, a diode D6, a diode D7, and a resistor R15; the primary side of the auxiliary transformer T3 comprises a first tap and a second tap; one end of the first tap is connected with a voltage input end, and the other end of the first tap is connected with the drain electrode of the MOS driving transistor Q1; one end of the second tap is grounded through the anode, the cathode and the capacitor C7 of the diode D5 in sequence, and the other end of the second tap is grounded; the grid electrode of the MOS driving transistor Q1 is connected with an auxiliary power supply control circuit, and the source electrode is grounded; the secondary side of the auxiliary transformer T3 is connected with the primary side of the auxiliary transformer T4; a diode D6 and a capacitor C8 are connected in parallel between the secondary side of the auxiliary transformer T3 and the primary side of the auxiliary transformer T4; the diode D7 and the capacitor C9 are connected in parallel at two ends of the secondary side of the auxiliary transformer T4.
The capacitor C7 and the diode D5, the capacitor C8 and the diode D6, and the capacitor C9 and the diode D7 respectively form a rectifying and filtering circuit. It should be noted that, the use of two-stage isolation coupling in which the auxiliary transformer T3 and the auxiliary transformer T4 are connected in series is an example of the present embodiment, and in fact, in order to further increase the isolation voltage, a plurality of auxiliary transformers may be connected in series for isolation coupling as required.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims (3)

1. A module power circuit for realizing high-voltage isolation comprises a main power circuit, a control circuit and an auxiliary power circuit; the main power supply circuit is characterized by comprising a plurality of main transformers connected in series; the auxiliary power supply circuit comprises a plurality of auxiliary transformers connected in series; the control circuit comprises a plurality of photoelectric couplers which are connected in series, and a direct current power supply is connected between the photoelectric couplers connected in series for supplying power; the voltage isolation of the module power supply is improved by adopting a multi-stage transformer and a photoelectric coupler, so that the module power supply can meet the requirement of high voltage isolation of more than or equal to 10KVac in a humid application environment;
The main power supply circuit comprises a main transformer T1, a main transformer T2, a rectifier bridge circuit and a filter circuit; the main transformer T1 is connected in series with the main transformer T2; the primary side of the main transformer T1 is connected with a high-frequency switch circuit; the secondary side of the main transformer T2 is connected with a load through a rectifier bridge circuit and a filter circuit in sequence;
The control circuit includes: the photoelectric coupler U1, the photoelectric coupler U2, the voltage comparator U3, the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the resistor R7, the resistor R8, the resistor R9, the resistor R10, the resistor R11, the resistor R12, the resistor R13, the resistor R14, the capacitor C3, the capacitor C4, the capacitor C5 and the capacitor C6; the resistor R10, the resistor R11, the resistor R12, the resistor R13 and the resistor R14 are sequentially connected in series, the resistor R7, the capacitor C6, the resistor R8 and the resistor R9 are sequentially connected in series, and an electrical connection point between the resistor R7 and the resistor R10 is connected with a positive input end of a load; the electrical connection point between the resistor R8 and the resistor R9 is connected with the electrical connection point between the resistor R13 and the resistor R14; one end of the resistor R9 and one end of the resistor R14 are connected with the negative input end of the load; the electrical connection point between the capacitor C6 and the resistor R8 is connected with the negative input end of the voltage comparator U3, and is connected with the output end of the voltage comparator U3 through the resistor R6 and the capacitor C5 in sequence; the positive input end of the voltage comparator U3 is connected with the VREF end; the output end of the voltage comparator U3 is connected with the VCC_S end of the auxiliary power supply circuit through a resistor R5 and a resistor R4 in sequence; the light emitting diode of the photoelectric coupler U2 is connected in parallel with the two ends of the resistor R4; one end of a phototriode of the photoelectric coupler U2 is connected with the VCC_M end of the auxiliary power supply circuit, and the other end of the phototriode is grounded through a resistor R2 and a resistor R3 in sequence; the light emitting diode of the photoelectric coupler U1 is connected in parallel with two ends of the resistor R3; one end of a phototriode of the photoelectric coupler U1 is connected with a high-frequency switch circuit, and the other end of the phototriode is grounded; the resistor C4 is connected in parallel with two ends of the phototriode of the photoelectric coupler U1; the capacitor C3 and the resistor R1 are connected in series and then connected in parallel to two ends of a phototriode of the photoelectric coupler U1;
The auxiliary power supply circuit comprises an auxiliary transformer T3, an auxiliary transformer T4, a MOS driving transistor Q1, a capacitor C7, a capacitor C8, a capacitor C9, a diode D5, a diode D6, a diode D7 and a resistor R15; the primary side of the auxiliary transformer T3 comprises a first tap and a second tap; one end of the first tap is connected with a voltage input end, and the other end of the first tap is connected with the drain electrode of the MOS driving transistor Q1; one end of the second tap is grounded through the anode, the cathode and the capacitor C7 of the diode D5 in sequence, and the other end of the second tap is grounded; the grid electrode of the MOS driving transistor Q1 is connected with an auxiliary power supply control circuit, and the source electrode is grounded; the secondary side of the auxiliary transformer T3 is connected with the primary side of the auxiliary transformer T4; a diode D6 and a capacitor C8 are connected in parallel between the secondary side of the auxiliary transformer T3 and the primary side of the auxiliary transformer T4; the diode D7 and the capacitor C9 are connected in parallel at two ends of the secondary side of the auxiliary transformer T4.
2. The modular power circuit of claim 1, wherein the rectifier bridge circuit comprises a diode D1, a diode D2, a diode D3, and a diode D4; the anode of the diode D1 is connected with the cathode of the diode D3; the anode of the diode D2 is connected with the cathode of the diode D4; an electrical connection point between the anode of the diode D1 and the cathode of the diode D3, and an electrical connection point between the anode of the diode D2 and the cathode of the diode D4 are respectively connected with two ends of the secondary side of the main transformer T2; the cathode of the diode D1 and the cathode of the diode D2 are both connected with a filter circuit; the anode of diode D3 and the anode of diode D4 are grounded.
3. The module power supply circuit for realizing high voltage isolation according to claim 2, wherein the filter circuit comprises a capacitor C1, a capacitor C2 and an inductor L1; one end of the capacitor C1 and one end of the capacitor C2 are respectively connected to two ends of the inductor L1, and the other end of the capacitor C is grounded; the electrical connection point between the capacitor C1 and the inductor L1 is connected with the cathode of the diode D1 and the cathode of the diode D2; the electrical connection point between the inductor L1 and the capacitor C2 is used as a positive input end of the load, and the other end of the capacitor C2 is used as a negative input end of the load.
CN201910782726.8A 2019-08-23 2019-08-23 Module power supply circuit for realizing high-voltage isolation Active CN110460248B (en)

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CN118300387A (en) * 2024-02-23 2024-07-05 东莞市晟鼎精密仪器有限公司 Isolation driving circuit for remote plasma source

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106061084A (en) * 2016-08-15 2016-10-26 东文高压电源（天津）股份有限公司 High-precision dedicated high-voltage module power supply for mercury lamp
CN210201737U (en) * 2019-08-23 2020-03-27 四川甘华电源科技有限公司 Module power supply circuit for realizing high-voltage isolation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103633876B (en) * 2013-12-19 2015-11-04 东文高压电源（天津）有限公司 Isolated controlling bipolarity high-frequency and high-voltage impulse power supply circuit
CN106130328A (en) * 2016-08-20 2016-11-16 嘉兴国电通新能源科技有限公司 A kind of double-tube series inverse-excitation type switch power-supply

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106061084A (en) * 2016-08-15 2016-10-26 东文高压电源（天津）股份有限公司 High-precision dedicated high-voltage module power supply for mercury lamp
CN210201737U (en) * 2019-08-23 2020-03-27 四川甘华电源科技有限公司 Module power supply circuit for realizing high-voltage isolation

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