CN211377892U - Power supply unit and power factor correction circuit thereof - Google Patents
Power supply unit and power factor correction circuit thereof Download PDFInfo
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- CN211377892U CN211377892U CN201922319564.2U CN201922319564U CN211377892U CN 211377892 U CN211377892 U CN 211377892U CN 201922319564 U CN201922319564 U CN 201922319564U CN 211377892 U CN211377892 U CN 211377892U
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- 238000012937 correction Methods 0.000 title claims abstract description 30
- 238000004146 energy storage Methods 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000001939 inductive effect Effects 0.000 claims 1
- 230000000875 corresponding effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 230000000903 blocking effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
Abstract
The application discloses power factor correction circuit includes: the alternating current switch circuit is connected with the alternating current source and used for carrying out power factor correction; a rectifying circuit connected to the AC switching circuit; the first end of the energy storage unit is connected with the first output end of the rectifying circuit, and the second end of the energy storage unit is connected with the second output end of the rectifying circuit; an inductance unit disposed between the AC source and the AC switch circuit; and the alternating current switching circuit includes: the first power switch is used as the first end of the alternating current switch circuit and connected with the first input end of the rectifying circuit, and the second end of the first power switch is connected with the second end of the second power switch; and the first end of the second power switch is used as the second end of the alternating current switch circuit and is connected with the second input end of the rectifying circuit. By applying the scheme of the application, the power supply efficiency can be further improved on the premise of ensuring the power factor of the circuit, and the condition that the power switch is damaged by overcurrent cannot occur. The application also provides a power supply device with corresponding effect.
Description
Technical Field
The utility model relates to a power technical field especially relates to a power supply unit and power factor correction circuit thereof.
Background
With the continuous development of electronic products and the increasing emphasis on energy, the quality of power systems and the conversion efficiency of power sources are receiving more and more attention. Since the phase shift or distortion of the input-side current may occur with the change of the impedance characteristics of the load side during power supply in the power system, a power factor corrector may be added to maintain the input-side current in a sine wave and in the same phase as the power supply voltage, to increase the active power, to reduce the effective value of the input-side inrush current, and to suppress the harmonic component of the input current.
The power factor is related to the performance of the converter, and is an important basis for measuring the quality of the AC-DC converter. The conventional AC-DC converter is composed of a bridge rectifier and a filter capacitor, and referring to fig. 1a, the circuit has simple structure and low cost, and does not need to introduce a controller. However, due to the nonlinear characteristics of the bridge rectifier, the operation mode of the circuit is a natural commutation mode, and the current at the power supply terminal is a nonlinear distorted waveform containing low-frequency harmonic components, as shown in fig. 1 b. Such a non-linear current waveform will reduce the power factor of the circuit, and too high harmonic components will also reduce the quality of the power supply at the power supply end, and in addition, too high current harmonics and the harmonic interference of the switching power supply itself will reduce the stability of the power system. Therefore, it is desirable to improve the power factor of the circuit.
Referring to fig. 2, the structure of fig. 2 is evolved from a full-bridge power factor corrector, and four power switching tubes are used to replace the conventional bridge rectifier, and the on and off of each power switch is controlled by a proper driving signal, so as to correct the power factor. However, such a circuit requires four power switches, which greatly increases the cost, and the control circuit is more complicated than a general power factor corrector, so that the frequency of the structure used in practical applications is very low.
Fig. 3 is a bridgeless ac switch power factor corrector circuit derived from fig. 2, wherein the ac switch composed of S1, S2, D1 and D2 is often used in applications where bidirectional current needs to flow through the power switch, such as power factor corrector and frequency converter. Ac switches were first used in matrix converters to convert an input three-phase ac power source to an ac output voltage having a relatively high variable frequency to drive a motor load. In the circuit of fig. 3, each power switch is connected to a blocking diode, i.e., D11 and D22, which are then connected back-to-back in parallel. By means of the D11 and the D22, the situation that when the S1 and the S2 are cut off, current flows through the body diodes of the S1 and the S2, and overcurrent damage of the power switch can be caused can be avoided. However, when S1 and S2 are turned on, current flows through the blocking diodes D11 and D22, which causes additional conduction loss and reduces the overall efficiency of the power supply.
In summary, how to further improve the power efficiency under the premise of ensuring the power factor of the circuit is a technical problem that needs to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a power supply unit and power factor correction circuit thereof to under the prerequisite of the power factor of guarantee circuit, further improve power efficiency.
In order to solve the technical problem, the utility model provides a following technical scheme:
a power factor correction circuit comprising:
the alternating current switch circuit is connected with the alternating current source and used for carrying out power factor correction;
a rectifying circuit connected to the AC switching circuit;
the first end of the energy storage unit is connected with the first output end of the rectifying circuit, and the second end of the energy storage unit is connected with the second output end of the rectifying circuit;
an inductance unit provided between the ac source and the ac switching circuit;
and the alternating current switching circuit includes:
the first power switch is used as the first end of the alternating current switch circuit and connected with the first input end of the rectifying circuit, and the second end of the first power switch is connected with the second end of the second power switch;
and the first end of the second power switch is used as the second end of the alternating current switch circuit and is connected with the second input end of the rectifying circuit.
Preferably, the inductance unit includes a first inductance, a first end of the first inductance is connected to the first output end of the ac source, and a second end of the first inductance is connected to the first end of the ac switching circuit.
Preferably, the inductance unit includes a second inductance and a third inductance;
a first end of the second inductor is connected with a first output end of the alternating current source, and a second end of the second inductor is connected with a first end of the alternating current switch circuit;
and the first end of the third inductor is connected with the second output end of the alternating current source, and the second end of the third inductor is connected with the second end of the alternating current switch circuit.
Preferably, the rectifier circuit is a bridge rectifier circuit including a first diode, a second diode, a third diode, and a fourth diode.
Preferably, the first power switch is a first MOS transistor, a source of the first MOS transistor is used as the second end of the first power switch, and a drain of the first MOS transistor is used as the first end of the first power switch;
the second power switch is a second MOS transistor, a source electrode of the second MOS transistor serves as a second end of the second power switch, and a drain electrode of the second MOS transistor serves as a first end of the second power switch.
Preferably, the first power switch is a first MOS transistor, a drain of the first MOS transistor is used as the second end of the first power switch, and a source of the first MOS transistor is used as the first end of the first power switch;
the second power switch is a second MOS transistor, a drain of the second MOS transistor serves as a second end of the second power switch, and a source of the second MOS transistor serves as a first end of the second power switch.
Preferably, the energy storage unit is a first capacitor, a first end of the first capacitor is used as a first end of the energy storage unit, and a second end of the first capacitor is used as a second end of the energy storage unit.
A power supply apparatus comprising the power factor correction circuit of any one of the above.
In the scheme of this application, the ac switching circuit includes: the first power switch is used as the first end of the alternating current switch circuit and connected with the first input end of the rectifying circuit, and the second end of the first power switch is connected with the second end of the second power switch; and the first end of the second power switch is used as the second end of the alternating current switch circuit and is connected with the second input end of the rectifying circuit. It can be seen that, because the second end of the first power switch is connected to the second end of the second power switch, the body diode of the first power switch and the body diode of the second power switch are in a reverse connection state, and when the first power switch and the second power switch are in a cut-off state, a path is not formed between the body diode of the first power switch and the body diode of the second power switch, so that no current flows through the first power switch and the second power switch, that is, the over-current damage of the power switches is avoided. Simultaneously, need not set up the separation diode among the AC switch circuit of this application, consequently when first power switch and second power switch on, the scheme of this application also can not produce extra conduction loss, consequently is favorable to improving the overall efficiency of power.
In conclusion, the scheme of the application can further improve the power efficiency on the premise of ensuring the power factor of the circuit, and the condition of overcurrent damage of the power switch cannot occur.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1a is a schematic diagram of a conventional AC-DC converter;
FIG. 1b is a schematic diagram of a nonlinear distortion waveform generated by a conventional AC-DC converter;
FIG. 2 is a schematic diagram of a bridge rectifier with four power switching transistors;
FIG. 3 is a schematic diagram of a conventional bridgeless AC switch power factor corrector circuit;
fig. 4 is a schematic structural diagram of a power factor correction circuit according to the present invention;
fig. 5 is a schematic structural diagram of another power factor correction circuit according to the present invention;
fig. 6 is a schematic diagram of a current direction of a power factor correction circuit in a first state according to the present invention;
fig. 7 is a schematic diagram of a current direction of a power factor correction circuit in a second state according to the present invention;
fig. 8 is a schematic diagram of a current direction of a power factor correction circuit in a third state according to the present invention;
fig. 9 is a schematic diagram of a current direction of a power factor correction circuit in a fourth state according to the present invention.
Detailed Description
The core of the utility model is to provide a power factor correction circuit, under the prerequisite of the power factor that the guarantee circuit had, can further improve power efficiency to the condition that power switch over-current damaged can not appear.
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a power factor correction circuit according to the present invention, the power factor correction circuit may include:
the alternating current switch circuit is connected with the alternating current source and used for carrying out power factor correction;
a rectifying circuit connected to the AC switching circuit;
the first end of the energy storage unit is connected with the first output end of the rectifying circuit, and the second end of the energy storage unit is connected with the second output end of the rectifying circuit;
and the inductance unit is arranged between the alternating current source and the alternating current switch circuit.
In the present invention, an ac switching circuit includes:
a first power switch Q1 having a first terminal connected to a first input terminal of the rectifier circuit as a first terminal of the ac switch circuit, and a second terminal connected to a second terminal of the second power switch Q2;
and a second power switch Q2 having a first terminal connected to the second input terminal of the rectifier circuit as a second terminal of the ac switching circuit.
The ac source is shown as Vs in fig. 4, and in the present embodiment, the ac switching circuit is connected to the ac source, and power factor correction can be achieved by the ac switching circuit. The post-stage circuit of the alternating current switch circuit is a rectifying circuit, the first end of the energy storage unit is connected with the first output end of the rectifying circuit, and the second end of the energy storage unit is connected with the second output end of the rectifying circuit.
Rectifier circuit's concrete circuit structure can set for as required and adjust, but in practical application, considers the cost that reduces the circuit, reduces control circuit's complexity to can realize power factor correction through the ac switch circuit in the scheme of this application, consequently, the utility model discloses an in the concrete implementation, rectifier circuit can specifically be: and a bridge rectifier circuit composed of a first diode D1, a second diode D2, a third diode D3 and a fourth diode D4. The rectifying circuit has simple structure and low cost, and does not need to introduce a controller to realize rectifying control.
The energy storage unit may be implemented by a capacitor. Specifically, the energy storage unit may be a first capacitor C1, a first terminal of the first capacitor C1 serves as a first terminal of the energy storage unit, and a second terminal of the first capacitor C1 serves as a second terminal of the energy storage unit. Of course, in other embodiments, other structures may be adopted to implement the energy storage unit, for example, a combination of series connection and parallel connection of a plurality of capacitors forms the energy storage unit of the present application, and the implementation of the present invention is not affected.
In the solution of the present application, the ac switch circuit includes only the first power switch Q1 and the second power switch Q2, and it is necessary to make the body diode in the first power switch Q1 and the body diode in the second power switch Q2 in a reverse connection state, so that when the first power switch Q1 and the second power switch Q2 are in an off state, a path is not formed between the body diode in the first power switch Q1 and the body diode in the second power switch Q2, that is, at this time, no current flows through the first power switch Q1 and the second power switch Q2, so that the situation of overcurrent damage of the power switches can be avoided. Thus, the present application connects the second terminal of the first power switch Q1 with the second terminal of the second power switch Q2 such that the body diode in the first power switch Q1 is in a reverse connected state with the body diode in the second power switch Q2. The first terminal of the first power switch Q1 is used as the first terminal of the ac switch circuit, and the first terminal of the second power switch Q2 is used as the second terminal of the ac switch circuit.
And because the alternating current switch circuit of this application need not set up the separation diode, only includes first power switch Q1 and second power switch Q2, consequently when first power switch Q1 and second power switch Q2 switch on, the scheme of this application can not produce the conduction loss of separation diode yet, consequently is favorable to improving the overall efficiency of power.
This application needs to utilize the inductance unit to carry out the energy storage, and the concrete circuit constitution of inductance unit also can be set for and adjust according to actual need, for example the utility model discloses an in a concrete implementation, the inductance unit includes first inductance L1, and first inductance L1's first end is connected with the first output of interchange source, and first inductance L1's second end is connected with the first end of interchange switch circuit.
In this embodiment, the first inductor L1 is provided between the first output terminal of the ac source and the first terminal of the ac switching circuit, but in other embodiments, the first inductor L1 may be provided between the second output terminal of the ac source and the second terminal of the ac switching circuit. The number of inductors required in such an embodiment is small.
In one embodiment of the present invention, referring to fig. 5, the inductance unit includes a second inductance L2 and a third inductance L3;
a first end of the second inductor L2 is connected to a first output end of the ac source, and a second end of the second inductor L2 is connected to a first end of the ac switching circuit;
a first terminal of the third inductor L3 is connected to the second output terminal of the ac source, and a second terminal of the third inductor L3 is connected to the second terminal of the ac switching circuit.
In the solution of the present application, the first power switch Q1 and the second power switch Q2 perform the same switching operation, so in terms of circuit analysis, when the first power switch Q1 and the second power switch Q2 are turned on in the positive half cycle state of the ac input, and when the first power switch Q1 and the second power switch Q2 are turned on in the negative half cycle state of the ac input, the current flows through the equivalent series inductor formed by the second inductor L2 and the third inductor L3. However, in actual operation, the layout of the circuit may affect the magnitude of the current peak of the positive and negative half cycles of the circuit, so in this embodiment, two separate inductors, i.e., the second inductor L2 and the third inductor L3, are used instead of the conventional design of a single inductor, which is beneficial to ensuring the balance of the current waveforms of the positive and negative half cycles. In addition, the design of two inductors is adopted in the implementation mode, so that the requirement on the inductance value of a single inductor is reduced, namely the inductance value can be halved, and the heat dissipation performance of the circuit is improved.
In one embodiment of the present invention, the first power switch Q1 is a first MOS transistor, a source of the first MOS transistor is used as the second end of the first power switch Q1, and a drain of the first MOS transistor is used as the first end of the first power switch Q1;
the second power switch Q2 is a second MOS transistor, a source of the second MOS transistor is used as the second terminal of the second power switch Q2, and a drain of the second MOS transistor is used as the first terminal of the second power switch Q2.
The first power switch Q1 and the second power switch Q2 of the present application are both MOS transistors, and in fig. 4 and 5 of the present application, the first power switch Q1 and the second power switch Q2 are both NMOS transistors, and their sources are connected together, so that their body diodes are in a reverse connection state. In other embodiments, a scheme of a PMOS transistor may also be selected, which may ensure that the body diodes of the two power switches are in a reverse connection state.
The operation of the circuit is described in the embodiment of fig. 5. There are four conduction paths for steady state current.
The first method comprises the following steps: when the positive half cycle of the ac input, i.e., Vs > 0, and the first power switch Q1 and the second power switch Q2 are in a conductive state. At this time, the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 are all turned off. The second inductor L2 and the third inductor L3 are in an energy storage state, and the load is powered by the energy storage unit, i.e., the first capacitor C1. Referring to fig. 6, the second inductor L2 and the third inductor L3 are considered as being connected in series, and LBT in fig. 6 represents the equivalent inductance of the second inductor L2 and the third inductor L3 in series.
And the second method comprises the following steps: when the positive half cycle of the ac input is complete, and the first power switch Q1 and the second power switch Q2 are off. At this time, the first diode D1 and the fourth diode D4 are turned on, and the third diode D3 and the second diode D2 are turned off. The second inductor L2 and the third inductor L3 discharge energy to the first capacitor C1 while supplying power to the load. The direction of the current can be seen in fig. 7.
And the third is that: when the negative half cycle of the ac input, i.e., Vs < 0, and the first power switch Q1 and the second power switch Q2 are in a conductive state. At this time, the first diode D1, the second diode D2, the third diode D3, and the fourth diode D4 are all turned off. The second inductor L2 and the third inductor L3 are in energy storage state, and the load is powered by the first capacitor C1. The direction of current flow can be seen in fig. 8.
And fourthly: when the negative half cycle of the ac input is on, and the first power switch Q1 and the second power switch Q2 are off. At this time, the first diode D1 and the fourth diode D4 are turned off, and the third diode D3 and the second diode D2 are turned on. The second inductor L2 and the third inductor L3 discharge energy to the first capacitor C1 while supplying power to the load. The direction of the current can be seen in fig. 9.
In the foregoing embodiment, the sources of the two MOS transistors are connected, and the drains of the two MOS transistors may be connected in other embodiments, which does not affect the implementation of the present invention. Specifically, in one embodiment of the present invention, the first power switch Q1 is a first MOS transistor, a drain of the first MOS transistor serves as the second end of the first power switch Q1, and a source of the first MOS transistor serves as the first end of the first power switch Q1; the second power switch Q2 is a second MOS transistor, a drain of the second MOS transistor serves as the second terminal of the second power switch Q2, and a source of the second MOS transistor serves as the first terminal of the second power switch Q2. This embodiment also replaces the first power switch Q1 and the second power switch Q2 in fig. 5 up and down.
In the scheme of this application, the ac switching circuit includes: a first power switch Q1 having a first terminal connected to a first input terminal of the rectifier circuit as a first terminal of the ac switch circuit, and a second terminal connected to a second terminal of the second power switch Q2; and a second power switch Q2 having a first terminal connected to the second input terminal of the rectifier circuit as a second terminal of the ac switching circuit. It can be seen that, since the second terminal of the first power switch Q1 is connected to the second terminal of the second power switch Q2, the body diode of the first power switch Q1 and the body diode of the second power switch Q2 are in a reverse connection state, and when the first power switch Q1 and the second power switch Q2 are in an off state, a path is not formed between the body diode of the first power switch Q1 and the body diode of the second power switch Q2, so that no current flows through the first power switch Q1 and the second power switch Q2, that is, the over-current damage of the power switches is avoided. Meanwhile, a blocking diode is not required to be arranged in the alternating current switch circuit, so that when the first power switch Q1 and the second power switch Q2 are conducted, extra conduction loss cannot be generated by the scheme of the application, and the overall efficiency of the power supply is improved.
In conclusion, the scheme of the application can further improve the power efficiency on the premise of ensuring the power factor of the circuit, and the condition of overcurrent damage of the power switch cannot occur.
Corresponding to the embodiment of the above power factor correction circuit, the embodiment of the present invention further provides a power supply device, which may include the power factor correction circuit in any of the above embodiments. The above description is referred to and not repeated here.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The principle and the implementation of the present invention are explained herein by applying specific examples, and the above descriptions of the embodiments are only used to help understand the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
Claims (8)
1. A power factor correction circuit, comprising:
the alternating current switch circuit is connected with the alternating current source and used for carrying out power factor correction;
a rectifying circuit connected to the AC switching circuit;
the first end of the energy storage unit is connected with the first output end of the rectifying circuit, and the second end of the energy storage unit is connected with the second output end of the rectifying circuit;
an inductance unit provided between the ac source and the ac switching circuit;
and the alternating current switching circuit includes:
the first power switch is used as the first end of the alternating current switch circuit and connected with the first input end of the rectifying circuit, and the second end of the first power switch is connected with the second end of the second power switch;
and the first end of the second power switch is used as the second end of the alternating current switch circuit and is connected with the second input end of the rectifying circuit.
2. The pfc circuit of claim 1, wherein the inductor unit comprises a first inductor having a first terminal connected to the first output terminal of the ac source and a second terminal connected to the first terminal of the ac switching circuit.
3. The pfc circuit of claim 1, wherein the inductive element comprises a second inductor and a third inductor;
a first end of the second inductor is connected with a first output end of the alternating current source, and a second end of the second inductor is connected with a first end of the alternating current switch circuit;
and the first end of the third inductor is connected with the second output end of the alternating current source, and the second end of the third inductor is connected with the second end of the alternating current switch circuit.
4. The power factor correction circuit according to claim 1, wherein the rectifier circuit is a bridge rectifier circuit including a first diode, a second diode, a third diode, and a fourth diode.
5. The power factor correction circuit according to claim 1, wherein the first power switch is a first MOS transistor, a source of the first MOS transistor serves as the second terminal of the first power switch, and a drain of the first MOS transistor serves as the first terminal of the first power switch;
the second power switch is a second MOS transistor, a source electrode of the second MOS transistor serves as a second end of the second power switch, and a drain electrode of the second MOS transistor serves as a first end of the second power switch.
6. The power factor correction circuit according to claim 1, wherein the first power switch is a first MOS transistor, a drain of the first MOS transistor serves as the second terminal of the first power switch, and a source of the first MOS transistor serves as the first terminal of the first power switch;
the second power switch is a second MOS transistor, a drain of the second MOS transistor serves as a second end of the second power switch, and a source of the second MOS transistor serves as a first end of the second power switch.
7. The power factor correction circuit according to claim 1, wherein the energy storage unit is a first capacitor, a first terminal of the first capacitor is used as the first terminal of the energy storage unit, and a second terminal of the first capacitor is used as the second terminal of the energy storage unit.
8. A power supply device characterized by comprising the power factor correction circuit according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201922319564.2U CN211377892U (en) | 2019-12-20 | 2019-12-20 | Power supply unit and power factor correction circuit thereof |
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| CN201922319564.2U CN211377892U (en) | 2019-12-20 | 2019-12-20 | Power supply unit and power factor correction circuit thereof |
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| CN211377892U true CN211377892U (en) | 2020-08-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113726144A (en) * | 2021-07-15 | 2021-11-30 | 华为数字能源技术有限公司 | Drive controller, control system and method of power factor correction circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113726144A (en) * | 2021-07-15 | 2021-11-30 | 华为数字能源技术有限公司 | Drive controller, control system and method of power factor correction circuit |
| CN113726144B (en) * | 2021-07-15 | 2023-11-03 | 华为数字能源技术有限公司 | Drive controller, control system and method of power factor correction circuit |
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