CN109217652A - A kind of control method of Bridgeless power factor circuit correcting circuit - Google Patents
A kind of control method of Bridgeless power factor circuit correcting circuit Download PDFInfo
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- CN109217652A CN109217652A CN201811267954.3A CN201811267954A CN109217652A CN 109217652 A CN109217652 A CN 109217652A CN 201811267954 A CN201811267954 A CN 201811267954A CN 109217652 A CN109217652 A CN 109217652A
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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
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
- H02M1/4208—Arrangements for improving power factor of AC input
-
- 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 invention discloses a kind of control methods of Bridgeless power factor circuit correcting circuit, Bridgeless power factor circuit correcting circuit includes AC power supply module, power module and control module, power module includes plural road interleaving PFC circuit and capacitor, every road interleaving PFC circuit includes an inductance and a pair of switches pipe, first termination AC power supply module of inductance, second end passes through the both ends that a pair of switches pipe is connected to capacitor respectively, and the control module samples the voltage of the inductance, carries out Integral Processing；When integrated value is greater than the set value, the switching tube of afterflow is closed, main switch is opened.The present invention is to the voltage sample on PFC inductance and integrates, and carries out control processing by integrated signal, realizes the accurate detection of PFC inductive current, improve transfer efficiency, reduce system cost.
Description
[technical field]
The present invention relates to circuit of power factor correction more particularly to a kind of controlling parties of Bridgeless power factor circuit correcting circuit
Method.
[background technique]
With the development of power electronics technology, non-linear power electronic equipment equipment is widely used, but simultaneously
Also very serious harmonic pollution, therefore PFC (Power Factor Correction, abbreviation are caused to power grid
PFC) circuit engineering needs extensive popularization and application, so that power electronic equipment Harmonics of Input is met international and domestic standard and wants
It asks.
Non-bridge PFC circuits are more traditional to have bridge PFC circuits that can reduce on-state loss, there is higher transfer efficiency, gradually at
For the application technology of PFC field mainstream.
Totem (Totem-Pole) non-bridge PFC circuits are usually operated at critical conduction mode (Critical Mode, CRM), tool
There is switch element Sofe Switch function, realize higher transfer efficiency, but there is a problem of that input and output ripple current is excessive, at present
It mostly uses two-way to interlock, two-way input ripple current is subjected to complementary superposition, input and output ripple current is substantially reduced, medium and small
Power occasion is widely used.
CRM pattern technology key point is how to detect PFC current zero-crossing point.Traditional way (as shown in Figure 1) is direct
The series current detecting element at PFC inductance, there are the higher problems of testing cost for this way；Application No. is
201210028511.5 invention it is (as shown in Figure 2) proposition each MOS at series current detecting element, equally exist detect at
This high problem；Application No. is the 201310466156.4 invention inductive drops (as shown in Figure 3) by detection PFC to overturn letter
Number carry out Cutoff current and cross flow point, but the technology is needed before the non-zero passage of electric current, turning off the driving of continued flow switch pipe in advance just can be real
It is existing, that is, all or part of synchronous rectification for sacrificing continued flow switch pipe is needed, transfer efficiency is reduced.
[summary of the invention]
The technical problem to be solved in the present invention is to provide a kind of higher Bridgeless power factor circuit correcting circuits of transfer efficiency
Control method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that, a kind of Bridgeless power factor circuit correcting circuit
Control method, Bridgeless power factor circuit correcting circuit includes AC power supply module, power module and control module, power module packet
Including plural road interleaving PFC circuit and capacitor, every road interleaving PFC circuit includes an inductance and a pair of switches pipe, and the first of inductance
AC power supply module is terminated, second end passes through the both ends that a pair of switches pipe is connected to capacitor, the control module respectively
The voltage of the inductance is sampled, Integral Processing is carried out；When integrated value is greater than the set value, the switching tube of afterflow is closed, master is opened
Switching tube.
Above-described control method, control module include controller and sub-control circuit corresponding with interleaving PFC circuit, are divided
Controlling circuit includes inductive drop sample circuit, integrating circuit and comparison circuit, and inductive drop sample circuit meets the two of the inductance
End, integrating circuit connect the output end of inductive drop sample circuit, and the output of integrating circuit terminates the first input end of comparison circuit,
The comparative level output end of second input termination controller of comparison circuit, the output of comparison circuit terminate controller.
Above-described control method, inductive drop sample circuit include the first operational amplifier, 4 resistance and 2 electricity
Hold, the first end of the inductance connects the inverting input terminal of the first operational amplifier, the second end of inductance by resistance first resistor
The non-inverting input terminal of the first operational amplifier is connect by resistance 3rd resistor；The non-inverting input terminal of first operational amplifier passes through electricity
Second resistance ground connection is hindered, first capacitor and resistance second resistance simultaneously connect；The inverting input terminal of first operational amplifier passes through the 4th
Resistance connects the output end of the first operational amplifier, and the second capacitor and the 4th resistance simultaneously connect, and the output end of the first operational amplifier is
The output end of inductive drop sample circuit.
Above-described control method, it includes that the inductance, which includes auxiliary induction winding, inductive drop sample circuit,
Five resistance, the 6th resistance, third capacitor and second operational amplifier；The first end of auxiliary induction winding connects by the 5th resistance
The non-inverting input terminal of two operational amplifiers, the second end ground connection of auxiliary induction winding；The non-inverting input terminal of second operational amplifier
Pass through the 6th resistance and third capacity earth；The output of the anti-phase input termination second operational amplifier of second operational amplifier
End, the output end of second operational amplifier are the output end of the sampling and outputting voltage of PFC inductance auxiliary winding induced voltage circuit.
Above-described control method, integrating circuit include third operational amplifier, the 7th resistance, the 8th resistance and the 4th
Capacitor；The inverting input terminal of third operational amplifier connects the sampling and outputting voltage of voltage detecting circuit by the 8th resistance, passes through
4th capacitor connects the output end of third operational amplifier, and the non-inverting input terminal of third operational amplifier passes through the 7th resistance eutral grounding；
The output end of third operational amplifier is the integral voltage output end of integrating circuit.
Above-described control method, sub-control circuit include integrate-dump circuit, and integrate-dump circuit includes current-limiting resistance
With reset switch pipe, reset switch pipe and current-limiting resistance are connected with the 4th capacitor of integrating circuit, the control terminal of reset switch pipe
Connect the clearing control signal output of controller.
Above-described control method, control module is using the overturning of comparison circuit comparison signal as per interleaving PFC all the way
The starting point of circuit control, when the integral voltage of integrating circuit output is greater than the comparative level of controller setting, comparison circuit
Comparison signal overturning, controller is first shut off the driving of continued flow switch pipe, while exporting clearing control signal, by integrating circuit
It resets, prepares for the integral in next period, dead zone delay time is set between continued flow switch pipe and main switch, it is continuous to ensure
It will not be led directly between stream switching tube, main switch；After the setting of dead zone delay time, closes and reset control signal, under starting
The integral in one period, while main switch driving is opened, the turn-on time of main switch is given, after the delay time of dead zone,
The comparative level of setting is corrected in the driving for opening continued flow switch pipe, and next comparison signal is waited to overturn.
Above-described control method compares when instantaneous AC input voltage is less than or equal to half output voltage
Level is set as negative value；When instantaneous AC input voltage is more than or equal to half output voltage, the comparison of comparison circuit is electric
It is flat to be set as zero.
Control method of the invention is to the voltage sample on PFC inductance and integrates, and carries out at control by integrated signal
Reason realizes the accurate detection of PFC inductive current, improves transfer efficiency, reduce system cost.
[Detailed description of the invention]
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
Fig. 1 is the circuit diagram of prior art CRM mode current sampling apparatus.
Fig. 2 is the circuit diagram of the non-bridge PFC circuits in the invention application No. is 201210028511.5.
Fig. 3 is the circuit diagram of the non-bridge PFC circuits in the invention application No. is 201310466156.4.
Fig. 4 is the circuit diagram of Bridgeless power factor circuit correcting circuit of the embodiment of the present invention.
Fig. 5 is the circuit diagram of high resistance sectional pressure voltage detecting circuit of the embodiment of the present invention.
Fig. 6 is the circuit diagram of auxiliary winding induced voltage detection circuit of the embodiment of the present invention.
Fig. 7 is the circuit diagram of signal integration circuit of the embodiment of the present invention.
Fig. 8 is the circuit diagram of signal integration clear circuit of the embodiment of the present invention.
Fig. 9 is the timing diagram of Bridgeless power factor circuit correcting circuit control method of the embodiment of the present invention.
Figure 10 is this comparative level of embodiment of the present invention setting logic chart.
[specific embodiment]
The structure of Bridgeless power factor circuit correcting circuit of the embodiment of the present invention is as shown in figure 4, include AC power supply module, power
Module and control module,
AC power supply module 1 includes AC power source, diode D1 and diode D2.
Power module includes two-way interleaving PFC circuit and capacitor C1, and first via interleaving PFC circuit includes PFC inductance L1, opens
Pipe Q1 and Q2 are closed, the second road interleaving PFC circuit includes PFC inductance L2, switching tube Q31 and Q4.The first termination of PFC inductance L1 is handed over
The input terminal Vin of galvanic electricity source module, second end pass through the both ends that switching tube Q1 and Q2 are connected to capacitor C1 respectively.PFC inductance L2
The first termination AC power supply module input terminal Vin, second end passes through switching tube Q31 and Q4 respectively and is connected to the two of capacitor C1
End.
The Bridgeless power factor circuit correcting circuit of the embodiment of the present invention is carried out by detecting to the voltage on PFC inductance
Integral Processing, according to inductive drop current relation formula:It works in the initial I of CRM modeo=0, so product
Electric current is at one-to-one linear relationship on sub-signal and PFC inductance.The detection mode is bigger than increasing current detection means method
It reduces costs greatly, without additional series circuit, does not increase conduction loss, improve transfer efficiency.In order to avoid integrating circuit
Intrinsic cumulative memory function bring influences, and controller does at clearing integrating circuit output level before each switch periods
Reason, clearing time are chosen at continued flow switch pipe dead time section before rear, main switch is connected, ensure integrated signal and PFC
The one-to-one linear relationship accuracy of inductive current, mentions high control precision.
The prior art is when instantaneous AC input voltage (Vin) is less than half output voltage (Vout), by continuous
The diode reverse recovery current of stream switching tube parasitism can only make the VDS voltage drop of main switch as low as Vout-2Vin, this condition
The comparative level of comparison circuit is set negative value by controller, introduces certain negative current, flows away drawing using this negative electricity and opens up
The body diode of element is closed, to realize that the no-voltage of switch element is connected (referring to application No. is 201210028511.5 inventions
Content).
Embodiment:
PFC inductive drop sampling circuit embodiment:
Voltage and controller between PFC inductance both ends altogether, cannot not sample simple series connection resistive-capacitive voltage divider circuit.
The preferred voltage detecting circuit of the embodiment of the present invention (inductive drop sample circuit) can use high resistance sectional pressure circuit,
As shown in figure 5, including operational amplifier U1-A, resistance R1 to R4, capacitor C1 and C2.The first end of inductance L1 is connect by resistance R1
The inverting input terminal of operational amplifier U1-A, the second end of inductance L1 connect the homophase input of operational amplifier U1-A by resistance R3
End.The non-inverting input terminal of operational amplifier U1-A is grounded by resistance R2, and capacitor C1 and resistance R2 simultaneously connects.Operational amplifier U1-A
Inverting input terminal the output end of operational amplifier U1-A is connect by resistance R4, capacitor C2 and resistance R4 simultaneously connects, operational amplifier
The output end of U1-A is the output end of the sampling and outputting voltage of high resistance sectional pressure circuit.
High resistance sectional pressure circuit preferred R1=R3, R2=R4, resistance value selection need to meet safety safety requirements, and capacitor C1, C2 are
Used in filtering, the influence of outer bound pair circuit is reduced.
Circuit input/output relation formula are as follows:Meet linear relationship, can both ensure sample circuit
Accuracy, and can ensure the safety of circuit design.
The preferred voltage detecting circuit of the embodiment of the present invention (inductive drop sample circuit) can also be assisted using PFC inductance
Winding induced voltage circuit.
PFC inductance auxiliary winding induced voltage circuit is as shown in fig. 6, include auxiliary induction winding L1-A, resistance RA1, electricity
Hinder RA2, capacitor CA1 and operational amplifier UA1-A.The first end of auxiliary induction winding L1-A connects operation amplifier by resistance RA1
The non-inverting input terminal of device UA1-A, the second end ground connection of auxiliary induction winding L1-A.The non-inverting input terminal of operational amplifier UA1-A
It is grounded by resistance RA2 and capacitor CA1.The output of the anti-phase input termination operational amplifier UA1-A of operational amplifier UA1-A
End, the output end of operational amplifier UA1-A are the output of the sampling and outputting voltage of PFC inductance auxiliary winding induced voltage circuit
End.
Auxiliary induction winding L1-A and L1 inductor winding meet safe insulation insulation request, turn ratio N, L1-A both end voltage
Altogether with controller, it can be realized using simple resistive-capacitive voltage divider circuit, circuit input/output relation formula are as follows:Meet linear relationship.
Integrating circuit embodiment:
The preferred signal integration circuit of the embodiment of the present invention as shown in fig. 7, comprises operational amplifier UA2-A, resistance RA3,
Resistance RA4 and capacitor CA2.The inverting input terminal of operational amplifier UA2-A is defeated by the sampling that resistance RA4 connects voltage detecting circuit
Voltage out, the output end of operational amplifier UA2-A is connect by capacitor CA2, and the non-inverting input terminal of operational amplifier UA2-A passes through electricity
Hinder RA3 ground connection.The output end of operational amplifier UA2-A is the integral voltage output end of integrating circuit.
Resistance RA4 forms a current source, carries out charge and discharge for capacitor CA2, realizes circuit output signal and input signal
Integral is linear relationship.Circuit input/output relation formula are as follows:
Wherein, VINGEGRAL is integral voltage, and PFCLVOUT is sample detecting voltage (sampling and outputting voltage).
Integrate-dump circuit embodiments:
The preferred integrate-dump circuit of the embodiment of the present invention as shown in figure 8, include current-limiting resistance RA5, switching tube QA1 and
QA2, switching tube QA1, QA2, current-limiting resistance RA5 connect with capacitor CA2, and the control of switching tube QA1 and QA2 terminate the clear of controller
Zero control signal output.
PWMZERO signal is issued by controller in circuit, is usually low level, and switching tube QA1 and QA2 are in by shape
State, capacitor CA2 can not be discharged by resistance RA5, when in continued flow switch pipe by after, main switch be connected before dead time
Duan Shi, PWMZERO signal set height, and switching tube QA1 and QA2 is in the conductive state, and capacitor CA2 discharges quickly through resistance RA5, will
The voltage of capacitor CA2 is reduced to zero.
Control process:
The control sequential of Bridgeless power factor circuit correcting circuit of the embodiment of the present invention is as shown in figure 9, circuit diagram is as shown in Figure 4.
Control module is using the overturning of comparison circuit comparison signal as the starting point per the control of interleaving PFC circuit all the way.When integral electricity
When the integral voltage of road output is greater than the comparative level of controller setting, the comparison signal overturning of comparison circuit, controller is first
The driving of continued flow switch pipe is closed, while being placed in high level for control signal (PWMZERO) is reset, at integrating circuit clearing
Reason is prepared for the integral in next period, and dead zone delay time Tdelay is arranged between continued flow switch pipe and main switch, to protect
Hindering will not will first reset between continued flow switch pipe, main switch there is a situation where straight-through, after the delay time Tdelay of dead zone
(PWMZERO) signal is placed in low level, starts the integral in next period, while opening main switch driving, according to constant Vout
Control algolithm gives the turn-on time Ton of main switch, then also passes through dead zone delay time Tdelay, open afterflow and open
The driving of pipe is closed, while correcting given comparative level, waits next comparison signal to overturn, in cycles.
As shown in Figure 10, the embodiment of the present invention is exported in instantaneous AC input voltage (Vin) less than or equal to half
When voltage (Vout), comparative level is set as negative value.Instantaneous AC input voltage (Vin) is more than or equal to half output electricity
When pressing (Vout), controller sets zero for the comparative level of comparison circuit, without certain negative current is introduced, avoids negative current
Bring efficiency reduces, to ensure transfer efficiency.
Above embodiments of the present invention are by integrating the voltage on PFC inductance, by controlling integrated signal
Processing is realized in the case where not needing to sacrifice continued flow switch pipe synchronous rectification, do not need to increase current measuring element
The accurate detection of PFC inductive current improves transfer efficiency, reduces system cost.In control, according to different input voltages
Value adjusts the comparative level in comparison circuit, further increases transfer efficiency.
Claims (8)
1. a kind of control method of Bridgeless power factor circuit correcting circuit, Bridgeless power factor circuit correcting circuit includes AC power source mould
Block, power module and control module, power module includes plural road interleaving PFC circuit and capacitor, every road interleaving PFC circuit include
One inductance and a pair of switches pipe, the first termination AC power supply module of inductance, second end pass through described a pair of switches respectively
Pipe is connected to the both ends of capacitor, which is characterized in that the control module samples the voltage of the inductance, carries out Integral Processing；When
When integrated value is greater than the set value, the switching tube of afterflow is closed, main switch is opened.
2. control method according to claim 1, which is characterized in that control module include controller and with interleaving PFC electricity
The corresponding sub-control circuit in road, sub-control circuit include inductive drop sample circuit, integrating circuit and comparison circuit, inductive drop sampling
Circuit connects the both ends of the inductance, and integrating circuit connects the output end of inductive drop sample circuit, and the output of integrating circuit terminates ratio
Compared with the first input end of circuit, the comparative level output end of the second input termination controller of comparison circuit, comparison circuit it is defeated
Controller is terminated out.
3. control method according to claim 2, which is characterized in that inductive drop sample circuit includes the first operation amplifier
Device, 4 resistance and 2 capacitors, the reverse phase that the first end of the inductance connects the first operational amplifier by resistance first resistor are defeated
Enter end, the second end of inductance connects the non-inverting input terminal of the first operational amplifier by resistance 3rd resistor；First operational amplifier
Non-inverting input terminal be grounded by resistance second resistance, first capacitor and resistance second resistance simultaneously connect；First operational amplifier
Inverting input terminal connects the output end of the first operational amplifier by the 4th resistance, and the second capacitor and the 4th resistance simultaneously connect, the first fortune
The output end for calculating amplifier is the output end of inductive drop sample circuit.
4. control method according to claim 2, which is characterized in that the inductance includes auxiliary induction winding, inductance
Voltage sampling circuit includes the 5th resistance, the 6th resistance, third capacitor and second operational amplifier；The first of auxiliary induction winding
End connects the non-inverting input terminal of second operational amplifier, the second end ground connection of auxiliary induction winding by the 5th resistance；Second operation
The non-inverting input terminal of amplifier passes through the 6th resistance and third capacity earth；The anti-phase input termination second of second operational amplifier
The output end of operational amplifier, the output end of second operational amplifier are the sampling of PFC inductance auxiliary winding induced voltage circuit
The output end of output voltage.
5. control method according to claim 2, which is characterized in that integrating circuit includes third operational amplifier, the 7th
Resistance, the 8th resistance and the 4th capacitor；The inverting input terminal of third operational amplifier connects voltage detecting circuit by the 8th resistance
Sampling and outputting voltage, the output end of third operational amplifier, the homophase input of third operational amplifier are connect by the 4th capacitor
End passes through the 7th resistance eutral grounding；The output end of third operational amplifier is the integral voltage output end of integrating circuit.
6. control method according to claim 5, which is characterized in that sub-control circuit includes integrate-dump circuit, and integral is clear
Zero circuit includes current-limiting resistance and reset switch pipe, and reset switch pipe and current-limiting resistance are connected with the 4th capacitor of integrating circuit,
The clearing control signal output of the control termination controller of reset switch pipe.
7. control method according to claim 6, which is characterized in that control module is with the overturning of comparison circuit comparison signal
As the starting point per interleaving PFC circuit control all the way, when the integral voltage of integrating circuit output is greater than the ratio of controller setting
When compared with level, the comparison signal of comparison circuit is overturn, and controller is first shut off the driving of continued flow switch pipe, while exporting clearing control
Signal processed, integrating circuit is reset, and prepares for the integral in next period, dead zone is arranged between continued flow switch pipe and main switch
Delay time will not be led directly between continued flow switch pipe, main switch with ensureing；After the setting of dead zone delay time, close clear
Zero control signal, starts the integral in next period, while opening main switch driving, gives the turn-on time of main switch, warp
After spending dead zone delay time, the driving of continued flow switch pipe is opened, corrects the comparative level of setting, next comparison signal is waited to turn over
Turn.
8. control method according to claim 7, which is characterized in that instantaneous AC input voltage be less than or equal to two/
When one output voltage, comparative level is set as negative value；When instantaneous AC input voltage is more than or equal to half output voltage,
The comparative level of comparison circuit is set as zero.
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| CN111969842A (en) * | 2019-05-20 | 2020-11-20 | 维谛公司 | Control method and device of PFC circuit |
| CN112398330A (en) * | 2020-12-25 | 2021-02-23 | 重庆宏一电气有限公司 | Bridgeless PFC converter and control method thereof |
| CN112865567A (en) * | 2021-01-28 | 2021-05-28 | 三峡大学 | Heterogeneous diode clamping type three-level rectifier |
| CN112865562A (en) * | 2021-01-28 | 2021-05-28 | 三峡大学 | Single-phase three-switch tube pseudo-totem-pole type three-level rectifier |
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| CN111969842A (en) * | 2019-05-20 | 2020-11-20 | 维谛公司 | Control method and device of PFC circuit |
| CN113078809A (en) * | 2020-01-03 | 2021-07-06 | 沃尔缇夫能源系统公司 | Control method and system of power factor correction circuit |
| CN112398330A (en) * | 2020-12-25 | 2021-02-23 | 重庆宏一电气有限公司 | Bridgeless PFC converter and control method thereof |
| CN112398330B (en) * | 2020-12-25 | 2021-10-15 | 重庆宏一电气有限公司 | Bridgeless PFC converter and control method thereof |
| CN112865566A (en) * | 2021-01-28 | 2021-05-28 | 三峡大学 | Single-phase three-level rectifier with three switching tubes |
| CN112910243A (en) * | 2021-01-28 | 2021-06-04 | 三峡大学 | Single-phase three-level pseudo-totem-pole power factor correction circuit |
| CN112910244A (en) * | 2021-01-28 | 2021-06-04 | 三峡大学 | Single-phase three-level power factor correction circuit of hybrid bridge arm |
| CN112865562A (en) * | 2021-01-28 | 2021-05-28 | 三峡大学 | Single-phase three-switch tube pseudo-totem-pole type three-level rectifier |
| CN112865567A (en) * | 2021-01-28 | 2021-05-28 | 三峡大学 | Heterogeneous diode clamping type three-level rectifier |
| CN112865567B (en) * | 2021-01-28 | 2022-05-20 | 三峡大学 | Heterogeneous diode clamping type three-level rectifier |
| CN112865562B (en) * | 2021-01-28 | 2022-05-20 | 三峡大学 | Single-phase three-switch tube pseudo-totem-pole type three-level rectifier |
| CN112865566B (en) * | 2021-01-28 | 2022-05-20 | 三峡大学 | Single-phase three-level rectifier with three switching tubes |
| CN112910243B (en) * | 2021-01-28 | 2022-06-14 | 三峡大学 | Single-phase three-level pseudo-totem-pole power factor correction circuit |
| CN113746308A (en) * | 2021-09-18 | 2021-12-03 | 国网江苏省电力有限公司苏州供电分公司 | Switching tube driving signal circuit for high-frequency bridgeless rectifying circuit and rectifying method |
| CN114527316A (en) * | 2022-04-24 | 2022-05-24 | 深圳市高斯宝电气技术有限公司 | Inductive current zero-crossing detection circuit of CRM mode PFC |
| CN114527316B (en) * | 2022-04-24 | 2022-08-26 | 深圳市高斯宝电气技术有限公司 | Inductive current zero-crossing detection circuit of CRM mode PFC |
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