CN101931320B - PFC (Power Factor Correction) voltage-reduction adjusting circuit and method as well as switch rectifier - Google Patents
PFC (Power Factor Correction) voltage-reduction adjusting circuit and method as well as switch rectifier Download PDFInfo
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- CN101931320B CN101931320B CN2010101065363A CN201010106536A CN101931320B CN 101931320 B CN101931320 B CN 101931320B CN 2010101065363 A CN2010101065363 A CN 2010101065363A CN 201010106536 A CN201010106536 A CN 201010106536A CN 101931320 B CN101931320 B CN 101931320B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention relates to a PFC (Power Factor Correction) voltage-reduction adjusting circuit, comprising a PFC module and a voltage adjusting unit, wherein the PFC module comprises a PFC main circuit, a PFC positive bus, a PFC negative bus, a PFC bus capacitor and a voltage adjusting unit, wherein the PFC bus capacitor is connected on the PFC positive and negative buses, the voltage adjusting unit is arranged on the PFC positive bus and comprises a third switch tube, the third switch tube is connected between an output positive end of the main circuit of the PFC module and the PFC bus capacitor, and the charging time of the PFC bus capacitor can be adjusted by controlling the on time of the third switch tube. The invention further discloses a switch rectifier provided with the PFC voltage-reduction adjusting circuit and a PFC voltage-reduction adjusting method for the PFC voltage-reduction adjusting circuit. Through effectively adjusting the voltage of a PFC bus by adopting the invention, the frequency modulation pressure of the backward stage LLC (Logic Link Control) circuit can be greatly relieved, thereby providing beneficial conditions for optimizing the design of the LLC circuit.
Description
Technical field
The present invention relates to switching circuit, particularly relate to a kind of PFC (Power Factor Correction, Active PFC) step-down Circuit tuning and method, switching rectifier.
Background technology
Current, the efficient switch rectifier of 48V/50A comprises rectification module and LLC resonant circuit, wherein rectification module comprises again rectification circuit and PFC module, the switching rectifier output voltage of 48V/50A is 42V～58V, then the LLC resonant circuit will be under the voltage range between 42V～58V frequency modulation, the voltage range that the LLC resonant circuit need to carry out frequency modulation is large, this requires high for the LLC parameter designing, make the LLC resonant circuit be difficult to reach optimum design, the task performance that improves the LLC resonant circuit is brought very large pressure.Known output voltage according to switching rectifier is adjusted the pressure that the PFC busbar voltage can be alleviated the LLC resonant circuit, this is because the adjustable range of the output voltage of the adjustable range of PFC busbar voltage and PFC module has corresponding relation, and in the adjustable extent of the output voltage of PFC module, the LLC resonant circuit all is operated on the resonant frequency point, need not frequency modulation, like this, the adjustable range of increase PFC busbar voltage has also just been alleviated the LLC resonant circuit needs the pressure of frequency modulation on a large scale.But because the PFC module directly is subjected to rectification module output voltage restriction (just reaching 375V behind the direct commutating voltage of the input voltage of 264VAC), the adjustable extent of PFC busbar voltage is very limited.
Summary of the invention
The technical problem that the present invention mainly will solve is exactly for the deficiencies in the prior art, a kind of PFC step-down Circuit tuning and method are provided, so that the PFC busbar voltage obtains effectively adjusting, thereby reduce the scope that the LLC resonant circuit needs frequency modulation, greatly reduce the frequency modulation pressure of LLC.
Another object of the present invention is to provides the switching rectifier that adopts this PFC step-down Circuit tuning, and the method that LLC resonant circuit tuning range in the switching rectifier is provided, and it has aforementioned advantages.
For achieving the above object, the present invention is by the following technical solutions:
A kind of PFC step-down Circuit tuning, comprise the PFC module, described PFC module comprises PFC main circuit, the positive and negative bus of PFC and is connected to PFC bus capacitor on the positive and negative bus of PFC, also comprise the voltage-adjusting unit that is arranged on the PFC positive bus-bar, described voltage-adjusting unit comprises the 3rd switching tube, described the 3rd switching tube is connected between the output plus terminal and PFC bus capacitor of main circuit of described PFC module, controls the service time of described the 3rd switching tube to adjust the charging interval of described PFC bus capacitor.
Preferably, described voltage-adjusting unit also comprises the 4th electric capacity and the first voltage stabilizing didoe that is connected with described the 3rd paralleled power switches, described the 3rd switching tube is metal-oxide-semiconductor, the negative pole of the drain electrode of described the 3rd switching tube and described the first voltage stabilizing didoe connects the output plus terminal of the main circuit of described PFC module, and the positive pole of the source electrode of described the 3rd switching tube and described the first voltage stabilizing didoe connects the positive pole of described PFC bus capacitor.
Preferably, described the 3rd switching tube voltage at two ends when opening is that zero the mode of naturally opening is controlled.
Preferably, described the 3rd switching tube two ends when opening exist the non-mode of naturally opening of voltage difference to control.
A kind of switching rectifier, comprise rectification circuit, be coupling in the PFC module of rectification circuit output end and the LLC resonant circuit that is coupled with described PFC module output, described PFC module comprises the PFC main circuit, PFC just, negative busbar and just being connected to, PFC bus capacitor on the negative busbar, also comprise the voltage-adjusting unit that is arranged on the PFC positive bus-bar, described voltage-adjusting unit comprises the 3rd switching tube, described the 3rd switching tube is connected between the output plus terminal and PFC bus capacitor of described PFC main circuit, controls the service time of described the 3rd switching tube to adjust the charging interval of described PFC bus capacitor.
A kind of PFC step-down method of adjustment is characterized in that, may further comprise the steps:
Whether the output voltage setting value of A. judging the PFC module is lower than the direct commutating voltage value of interchange input, if yes then enter next step;
B. control is arranged on service time of the 3rd switching tube on the PFC positive bus-bar, regulates the PFC busbar voltage by the charging interval of adjusting the PFC bus capacitor.
Preferably, described the 3rd switching tube voltage at two ends when opening is that zero the mode of naturally opening is controlled.
A kind of method of adjusting LLC resonant circuit tuning range in the switching rectifier is characterized in that, may further comprise the steps:
Whether the output voltage setting value of C. judging the PFC module is lower than the direct commutating voltage value of interchange input, if yes then enter next step;
D. control is arranged on service time of the 3rd switching tube on the PFC positive bus-bar, regulates the PFC busbar voltage, the adjustable extent of the output voltage of the corresponding PFC module of the adjustable extent of described PFC busbar voltage by the charging interval of adjusting the PFC bus capacitor; Described LLC resonant circuit frequency modulation outside the adjustable extent of the output voltage of described PFC module.
The technique effect that the present invention is useful is:
PFC step-down Circuit tuning of the present invention comprises PFC module and the voltage-adjusting unit that is arranged on the PFC positive bus-bar, described voltage-adjusting unit comprises the 3rd switching tube, described the 3rd switching tube is connected between the output plus terminal and PFC bus capacitor of main circuit of described PFC module, the service time of controlling described the 3rd switching tube can be adjusted the charging interval of described PFC bus capacitor, because charging interval of PFC bus capacitor is charging during the opening of the 3rd switching tube only, therefore can realize effective adjusting of PFC busbar voltage, and then the correspondence that realizes PFC module output voltage is regulated, so just reducing the LLC resonant circuit needs the voltage range of frequency modulation, greatly alleviates the frequency modulation pressure of LLC resonant circuit.For example, during for the 48V/50A switching rectifier, the switching rectifier output voltage is 42V～58V, the LLC resonant circuit needs to adjust frequency between 42V～58V, by the service time of control voltage-adjusting unit, the PFC busbar voltage can be adjusted between 315V～407V, wherein, the PFC module output voltage of the corresponding 42V of the PFC busbar voltage of 315V, the PFC module output voltage of the corresponding 53.5V of the PFC busbar voltage of 401V, and the PFC busbar voltage of 407V has corresponded to the PFC module output voltage of 54.3V, that is to say, output range of regulation in the PFC module is between 42V～54.3V, the LLC resonant circuit all is operated on the resonant frequency point, and the LLC resonant circuit is only adjusted frequency between 54.3V～58V, and this has just dwindled the tuning range of LLC resonant circuit greatly, the LLC parameter designing is more optimized, obtained higher efficient.
Description of drawings
Fig. 1 is the circuit diagram with rectification module of a kind of embodiment PFC step-down Circuit tuning;
Fig. 2 is the circuit diagram with rectification module of another kind of embodiment PFC step-down Circuit tuning;
Fig. 3 and 4 is two kinds of PFC busbar voltage working waveform figures of the embodiment of the invention;
Fig. 5 is the structured flowchart of the switching rectifier of an embodiment of the present invention;
Fig. 6 is the flow chart of PFC step-down method of adjustment of the present invention;
Fig. 7 is the flow chart of the method for LLC resonant circuit tuning range of the present invention.
Embodiment
Fig. 1 and Fig. 2 have showed the rectification module of the PFC step-down Circuit tuning with different embodiment.Rectification module comprises rectification circuit and the PFC step-down Circuit tuning that is coupling in rectification circuit output end, and PFC step-down Circuit tuning comprises PFC module and voltage-adjusting unit.Wherein, the PFC module comprises PFC main circuit, the positive and negative bus of PFC and is connected to PFC bus capacitor C1 on the positive and negative bus of PFC.Voltage-adjusting unit is arranged on the PFC positive bus-bar, and voltage-adjusting unit comprises the 3rd switching tube Q3, and the 3rd switching tube Q3 is connected between the output plus terminal and PFC bus capacitor C1 of PFC main circuit.Control the service time of the 3rd switching tube Q3, namely can be corresponding charging interval of control PFC bus capacitor C1, reach the effective adjusting to the PFC busbar voltage.
Wherein, voltage-adjusting unit is lower than at the output voltage setting value of PFC module and works when exchanging the direct commutating voltage value of input, namely this moment the 3rd switching tube Q3 branch road in working order, the PFC busbar voltage is adjustable.Exchanging the direct commutating voltage value of input can be according to the AC-input voltage value of rectification module
Conversion obtains.
Please refer to Fig. 1, in a preferred embodiment, rectification circuit comprises the second capacitor C 2, the 3rd diode D3, the 3rd capacitor C 3 and the 4th diode D4, the main circuit of PFC module adopts without the bridge topology, comprise the first metal-oxide-semiconductor Q1, the first diode D1, the second metal-oxide-semiconductor Q2 and the second diode D2, wherein, the second capacitor C 2 and the 3rd diode D3, the 3rd capacitor C 3 and the 4th diode D4, the first metal-oxide-semiconductor Q1 and the first diode D1 and the second metal-oxide-semiconductor Q2 and the second diode D2 are in series respectively and are connected across between the positive and negative bus.The serial connection of the first metal-oxide-semiconductor Q1 and the first diode D1 o'clock is connected to the serial connection point of the 3rd capacitor C 3 and the 4th diode D4 by the first inductance L 1, the serial connection of the second metal-oxide-semiconductor Q2 and the second diode D2 o'clock is connected to the serial connection point of the second capacitor C 2 and the 3rd diode D3 by the second inductance L 2.
In a preferred embodiment, voltage-adjusting unit comprises the 3rd switching tube Q3 and the 4th capacitor C 4 and the first voltage stabilizing didoe D7 that are connected in parallel with the 3rd switching tube Q3, the 3rd switching tube Q3 can be metal-oxide-semiconductor, the negative pole of the drain electrode of the 3rd switching tube Q3 and the first voltage stabilizing didoe D7 connects the output plus terminal of the main circuit of PFC module, the output negative terminal of the main circuit of PFC module connects the negative pole of bus capacitor C1, and the positive pole of the source electrode of the 3rd switching tube Q3 and the first voltage stabilizing didoe D7 connects the positive pole of bus capacitor C1.Bus capacitor C1 is polar capacitor, for example electrochemical capacitor.
The operation principle of PFC step-down Circuit tuning is as follows:
PFC step-down Circuit tuning of the present invention is to have increased the circuit behind the voltage-adjusting unit in conventional P FC module, output voltage setting value and the comparison that exchanges the direct commutating voltage value of input according to the PFC module, the PFC module exists following two kinds of mode of operation: Boost (boosting) mode of operations and phase control rectifier mode of operation, works when the PFC module is in the phase control rectifier mode of operation during voltage-adjusting unit.
When PFC output voltage setting value higher, be not less than when exchanging the direct commutating voltage value of input, the PFC module is operated under the Boost pattern, this moment since third and fourth diode D3, D4 oppositely to the top, the 3rd switching tube Q3 branch road of PFC step-down Circuit tuning is not worked, and voltage-adjusting unit is inoperative.
When PFC output voltage setting value is lower than the direct commutating voltage value of interchange input, the PFC module is operated under the phase control rectifier mode of operation, first and second switching tube Q1, Q2 quit work at this moment, the 3rd switching tube Q3 branch road work of PFC step-down Circuit tuning, be in the phase-controlled power state, the service time of controlling the 3rd switching tube Q3 is capable of regulating PFC busbar voltage.
In some preferred embodiments, adopt nature to open mode, the voltage V on the PFC bus capacitor to the control of the 3rd switching tube Q3
C1Work wave as shown in Figure 3.The service time of adjusting the 3rd switching tube Q3 is capable of regulating PFC output voltage, and service time is less, capacitance voltage V
C1Effective value is lower, and the PFC output voltage and then reduces.When the advantage of naturally opening mode was that the 3rd switching tube Q3 opens, both end voltage was zero, and its two ends are voltage source during shutoff, and pressure reduction is smaller when opening, can not surpass 100V, the 3rd switching tube Q3 operating pressure is very little, and this is conducive to choosing and designing of metal-oxide-semiconductor.
In other preferred embodiments, the non-mode of naturally opening, the voltage V on the PFC bus capacitor are adopted in the control of the 3rd switching tube Q3
C1Work wave as shown in Figure 4.Equally, the service time of adjusting the 3rd switching tube Q3 is capable of regulating PFC output voltage, and service time is less, capacitance voltage V
C1Effective value is lower, and the PFC output voltage and then reduces.The non-advantage of naturally opening mode is to control the PF value.
As shown in Figure 2, be with last embodiment difference, the main circuit of PFC module adopts common bridge type topology among this embodiment, wherein, the first diode D1 and the 3rd diode D3 are connected in series, the second diode D2 and the 4th diode D4 are connected in series, the negative electrode of the negative electrode of the first diode D1 and the second diode D2 is with connecing an end of the 3rd inductance L 3 and the anode of the 6th diode D6, the drain electrode of the other end of the 3rd inductance L 3 and the first metal-oxide-semiconductor Q1 is with the anode that connects the 5th diode, the source electrode of the first metal-oxide-semiconductor Q1, the anode of the anode of the 3rd diode D3 and the 4th diode D4 is with the negative pole that meets PFC bus capacitor C1.Voltage-adjusting unit is identical with the structure of a upper embodiment, comprises the 3rd switching tube Q3 and the 4th capacitor C 4 that is connected in parallel with it and the first voltage stabilizing didoe D7.
The input of the voltage-adjusting unit i.e. drain electrode of the 3rd switching tube Q3 joins with the negative electrode of the 5th diode and the negative electrode of the 6th diode.
Operation principle and the previous embodiment of PFC step-down Circuit tuning are similar, repeat no more.
As shown in Figure 5, in another aspect of this invention, the switching rectifier that adopts PFC step-down Circuit tuning of the present invention is also disclosed, it comprises rectification circuit, be coupling in the PFC module of rectification circuit output end and the LLC resonant circuit that is coupled with PFC module output, the PFC module comprises the PFC main circuit, PFC just, negative busbar and just be connected to PFC, PFC bus capacitor on the negative busbar, wherein, be provided with voltage-adjusting unit at the PFC positive bus-bar, voltage-adjusting unit comprises the 3rd switching tube Q3 between the output plus terminal of the main circuit that is connected to the PFC module and the PFC bus capacitor, control the service time of the 3rd switching tube Q3, namely can be corresponding charging interval of control PFC bus capacitor C1, reach the effective adjusting to the PFC busbar voltage, thereby reduce the voltage range that the LLC resonant circuit need to carry out frequency adjustment.
In an application example, for the 48V/50A switching rectifier, output voltage 42V～the 58V of rectifier, the LLC resonant circuit needs to adjust frequency between 42V～58V, pass through voltage-adjusting unit, the PFC busbar voltage can be adjusted between 315V～407V, wherein, the output voltage of the PFC module of the corresponding 42V of the PFC busbar voltage of 315V, the output voltage of the PFC module of the corresponding 53.5V of the PFC busbar voltage of 401V, and the PFC busbar voltage of 407V has corresponded to the output voltage of the PFC module of 54.3V, that is to say, between the adjustable range 42V of the output voltage of PFC module～54.3V, rear class LLC resonant circuit all is operated on the resonant frequency point, and only needs the LLC resonant circuit to adjust frequency between 54.3V～58V, and this has just dwindled the tuning range of LLC resonant circuit greatly, the LLC parameter designing is more optimized, obtained higher efficient.
In another aspect of this invention, also disclose a kind of PFC step-down method of adjustment, as shown in Figure 6, may further comprise the steps:
Steps A. whether the output voltage setting value of judging the PFC module is lower than the direct commutating voltage value of interchange input, if yes then enter next step;
Step B. control is arranged on the service time of the 3rd switching tube on the PFC positive bus-bar, regulates the PFC busbar voltage by the charging interval of adjusting the PFC bus capacitor.
Preferably, the 3rd switching tube voltage at two ends when opening is that zero the mode of naturally opening is controlled.
In still another aspect of the invention, also disclose a kind of method of adjusting LLC resonant circuit tuning range in the switching rectifier, as shown in Figure 7, may further comprise the steps:
Step C. judges whether the output voltage setting value of PFC module is lower than the direct commutating voltage value of interchange input, if yes then enter next step;
Step D. control is arranged on the service time of the 3rd switching tube on the PFC positive bus-bar, regulates the PFC busbar voltage, the adjustable extent of the output voltage of the corresponding PFC module of the adjustable extent of described PFC busbar voltage by the charging interval of adjusting the PFC bus capacitor; Described LLC resonant circuit frequency modulation outside the adjustable extent of the output voltage of described PFC module.
In actual applications, according to harmonic standard and PF testing standard, all only test PF value and harmonic wave under specified input and the rated output voltage full-load range condition, under other conditions, all do not do requirement under non-specified input voltage, non-rated output voltage and the limiting condition.For example, for rectifier, specified initial conditions Europe is 230VAC, and China is 220VAC, for the U.S., if adopt the double fire wire input, the highlyest may arrive 240VAC, and specified output condition is 53.5V.Under the circumstances, do not allow to enter into phased mode of operation in 240VAC input and 53.5V output condition lower module, thereby the LLC circuit of rectifier is inputted direct commutating voltage 336VDC in the interchange that PFC busbar voltage corresponding to 53.5V output will be higher than 240VAC, to be operated in the Boost pattern.In order to be operated in phased pattern, the PFC busbar voltage that the specified LLC of correspondence can be output as 53.5V obtains higher, for example be 375VDC, then have, when voltage 42V～58V is adjusted in rectifier output, (this moment, adjusting range was the requirement that 294VDC～407VDC) just can satisfy the output voltage adjustment only need to adjust accordingly the PFC busbar voltage, optimally, the LLC circuit will be operated under the rated frequency condition always, the LLC circuit is worked under rated frequency, its dynamic response characteristic is very good, from dynamic response, and frequency is almost constant with the characteristic by the LLC circuit in the variation of load, and after entering the constant current current limliting stage, still can reach the purpose of current limliting by the mode of adjusting the PFC output voltage, thereby can greatly optimize the design of LLC.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that implementation of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (8)
1. PFC step-down Circuit tuning, comprise the PFC module, described PFC module comprises PFC main circuit, the positive and negative bus of PFC and is connected to PFC bus capacitor on the positive and negative bus of PFC, it is characterized in that, also comprise the voltage-adjusting unit that is arranged on the PFC positive bus-bar, described voltage-adjusting unit comprises the 3rd switching tube, described the 3rd switching tube is connected between the output plus terminal and PFC bus capacitor of main circuit of described PFC module, controls the service time of described the 3rd switching tube to adjust the charging interval of described PFC bus capacitor.
2. PFC step-down Circuit tuning as claimed in claim 1, it is characterized in that, described voltage-adjusting unit also comprises the 4th electric capacity and the first voltage stabilizing didoe that is connected with described the 3rd paralleled power switches, the negative pole of the drain electrode of described the 3rd switching tube and described the first voltage stabilizing didoe connects the output plus terminal of described PFC main circuit, and the positive pole of the source electrode of described the 3rd switching tube and described the first voltage stabilizing didoe connects the positive pole of described PFC bus capacitor.
3. PFC step-down Circuit tuning as claimed in claim 1 or 2 is characterized in that, described the 3rd switching tube voltage at two ends when opening is that zero the mode of naturally opening is controlled.
4. PFC step-down Circuit tuning as claimed in claim 1 or 2 is characterized in that, described the 3rd switching tube two ends when opening exist the non-mode of naturally opening of voltage difference to control.
5. switching rectifier, comprise rectification circuit, be coupling in the PFC module of rectification circuit output end and the LLC resonant circuit that is coupled with described PFC module output, described PFC module comprises the PFC main circuit, PFC just, negative busbar and just being connected to, PFC bus capacitor on the negative busbar, it is characterized in that, also comprise the voltage-adjusting unit that is arranged on the PFC positive bus-bar, described voltage-adjusting unit comprises the 3rd switching tube, described the 3rd switching tube is connected between the output plus terminal and PFC bus capacitor of described PFC main circuit, controls the service time of described the 3rd switching tube to adjust the charging interval of described PFC bus capacitor.
6. a PFC step-down method of adjustment that adopts PFC step-down Circuit tuning claimed in claim 1 is characterized in that, may further comprise the steps:
Whether the output voltage setting value of A. judging the PFC module is lower than the direct commutating voltage value of interchange input, if yes then enter next step;
B. control is arranged on service time of the 3rd switching tube on the PFC positive bus-bar, regulates the PFC busbar voltage by the charging interval of adjusting the PFC bus capacitor.
7. PFC step-down Circuit tuning as claimed in claim 6 is characterized in that, described the 3rd switching tube voltage at two ends when opening is that zero the mode of naturally opening is controlled.
8. a method of adjusting the LLC resonant circuit tuning range in the switching rectifier claimed in claim 5 is characterized in that, may further comprise the steps:
Whether the output voltage setting value of C. judging the PFC module is lower than the direct commutating voltage value of interchange input, if yes then enter next step;
D. control is arranged on service time of the 3rd switching tube on the PFC positive bus-bar, regulates the PFC busbar voltage, the adjustable extent of the output voltage of the corresponding PFC module of the adjustable extent of described PFC busbar voltage by the charging interval of adjusting the PFC bus capacitor; Described LLC resonant circuit frequency modulation outside the adjustable extent of the output voltage of described PFC module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101065363A CN101931320B (en) | 2010-01-28 | 2010-01-28 | PFC (Power Factor Correction) voltage-reduction adjusting circuit and method as well as switch rectifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101065363A CN101931320B (en) | 2010-01-28 | 2010-01-28 | PFC (Power Factor Correction) voltage-reduction adjusting circuit and method as well as switch rectifier |
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| CN101931320A CN101931320A (en) | 2010-12-29 |
| CN101931320B true CN101931320B (en) | 2013-03-06 |
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| TWI437410B (en) * | 2011-09-30 | 2014-05-11 | Ind Tech Res Inst | Buck power factor correcting systems |
| CN103855765A (en) * | 2014-01-26 | 2014-06-11 | 江苏博强新能源科技有限公司 | Battery management system protecting device preventing over-voltage impact |
| KR101592743B1 (en) * | 2014-07-28 | 2016-02-12 | 현대자동차주식회사 | Method for controlling on-board charger of eco-friendly vehicle |
| CN110120752B (en) * | 2018-02-05 | 2021-04-27 | 台达电子企业管理（上海）有限公司 | Power converter and control method thereof |
| CN110941322A (en) * | 2019-12-06 | 2020-03-31 | 苏州浪潮智能科技有限公司 | Method and system for optimizing server power supply |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6998732B2 (en) * | 2002-07-23 | 2006-02-14 | Lite-On Technology Corporation | Power system for supplying stable power |
| CN101247072A (en) * | 2007-02-13 | 2008-08-20 | 艾默生网络能源系统有限公司 | Voltage regulating circuit |
| CN101505107A (en) * | 2009-01-20 | 2009-08-12 | 华南理工大学 | Low voltage stress single-stage AC-DC converter based on LLC series resonance |
| CN101527520A (en) * | 2009-01-20 | 2009-09-09 | 华南理工大学 | Single-stage single-phase AC-DC convertor based on LLC series resonance |
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2010
- 2010-01-28 CN CN2010101065363A patent/CN101931320B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6998732B2 (en) * | 2002-07-23 | 2006-02-14 | Lite-On Technology Corporation | Power system for supplying stable power |
| CN101247072A (en) * | 2007-02-13 | 2008-08-20 | 艾默生网络能源系统有限公司 | Voltage regulating circuit |
| CN101505107A (en) * | 2009-01-20 | 2009-08-12 | 华南理工大学 | Low voltage stress single-stage AC-DC converter based on LLC series resonance |
| CN101527520A (en) * | 2009-01-20 | 2009-09-09 | 华南理工大学 | Single-stage single-phase AC-DC convertor based on LLC series resonance |
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