CN116191858A - Cuk type power factor correction circuit based on switching inductance - Google Patents

Cuk type power factor correction circuit based on switching inductance Download PDF

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Publication number
CN116191858A
CN116191858A CN202211385789.8A CN202211385789A CN116191858A CN 116191858 A CN116191858 A CN 116191858A CN 202211385789 A CN202211385789 A CN 202211385789A CN 116191858 A CN116191858 A CN 116191858A
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China
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inductance
diode
power factor
switch tube
factor correction
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CN202211385789.8A
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Inventor
李文静
姚俊伟
谢琼瑶
何奇
范李平
马辉
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China Three Gorges University CTGU
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China Three Gorges University CTGU
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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
    • 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
    • H02M1/0048—Circuits or arrangements for reducing losses
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from ac input or output
    • 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
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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

Cuk type power factor correction circuit based on switching inductance comprises a switching tube S 1 ~S 3 Diode D 1 ~D 5 Inductance L 1 ~L 5 Capacitance C 1 And C o . Wherein, diode D 3 ~D 5 Inductance L 3 、L 4 The switching inductance structure is formed. The converter voltage gain is D/(2-D), compared with the traditional Cuk PFC converter, the power factor correction circuit realizes positive voltage output, improves voltage reduction gain, ensures that the converter is in a voltage reduction state in a full duty ratio range, and has high voltage reduction ratioCompared with the traditional Cuk PFC converter, the duty ratio is larger, and the occurrence of the limit duty ratio is effectively avoided. By adopting the bridgeless structure, lower on-state loss can be realized. The power factor correction circuit has continuous input and output current, high power factor and high efficiency and has great practical value.

Description

Cuk type power factor correction circuit based on switching inductance
Technical Field
The invention relates to the technical field of power electronic converters, in particular to a Cuk type power factor correction circuit based on a switching inductance.
Background
With the reduction of traditional energy resources and the increasingly serious atmospheric pollution problem, a smart grid mainly based on distributed power generation and clean energy is gradually replacing a traditional power grid mainly based on fossil energy power generation. There are many application scenarios requiring low-voltage dc power in smart grids, such as lithium battery charging, auxiliary power in a power distribution cabinet, and the like. Therefore, it is particularly necessary to develop an AC-DC converter having a large step-down ratio and high efficiency.
A conventional single-phase active power factor correction (active power factor correction, APFC) converter consists of a front-end bridge rectifier circuit and a back-end DC-DC circuit, with typical DC-DC circuits including the usual Buck, boost, buck-Boost, cuk, sepic and Zeta circuits. Since Buck converters have an inherent input current dead angle, the input current is zero, which results in a large total harmonic distortion (total harmonic distortion, THD) and a low Power Factor (PF). Boost-type converters are most widely used because of the continuous input current, but they are only suitable for Boost mode, and a further stage of converter must be added to output low voltage, which undoubtedly increases the overall cost and volume. Buck-Boost converters have negative polarity of the output voltage and discontinuous input current resulting in a low power factor. The Sepic-type converter has continuous input current but discontinuous output current, resulting in high output voltage ripple. The Cuk converter has continuous input current, small ripple and wide output voltage range, and is widely applied to low-voltage power occasions.
Disclosure of Invention
In order to solve the problems that the traditional Cuk PFC converter is low in efficiency, the duty ratio range is limited in the buck mode, the polarity of output voltage is negative, an inverting amplifier circuit is needed to be added, and therefore the size and cost of the converter are increased. The invention provides a Cuk type power factor correction circuit based on a switching inductance, which realizes positive voltage output, improves voltage reduction gain, ensures that the voltage reduction state is maintained in a full duty ratio range, has larger duty ratio than the traditional Cuk PFC converter under the condition of high voltage reduction ratio, and effectively avoids the occurrence of limit duty ratio.
The technical scheme adopted by the invention is as follows:
cuk type power factor correction circuit based on switching inductance comprises an alternating current power supply u s Switch tube S 1 ～S 3 Diode D 1 ～D 5 Inductance L 1 ～L 5 Capacitance C 1 、C o ，
AC power supply u s One side is respectively connected with a switch tube S 3 Source electrode, inductance L 1 One end of the inductor L 1 One end and the other end are connected with a diode D 1 A cathode;
AC power supply u s The other side is respectively connected with a switch tube S 2 Source electrode, inductance L 2 One end of the inductor L 2 The other end is connected with a diode D 2 A cathode;
capacitor C 1 The cathodes are respectively connected with a diode D 1 Anode, diode D 2 Anode, switch tube S 1 A source electrode;
inductance L 5 One end of (a) is respectively connected with a capacitor C 1 Positive electrode and diode D 3 Cathode, inductance L 3 Is one end of the inductance L 5 And the other end of (C) and the output capacitor C o The positive electrode is connected;
inductance L 3 The other ends of (a) are respectively connected with a diode D 4 Cathode, diode D 5 A cathode;
inductance L 4 One end is respectively connected with a diode D 3 Anode, diode D 5 An anode; inductance L 4 The other ends are respectively connected with a diode D 4 Anode, switch tube S 1 Drain electrode, switch tube S 2 Drain electrode, switch tube S 3 Drain, output capacitance C o A negative electrode;
output capacitor C o And the load R L And are connected in parallel.
In the power factor correction circuit, an inductance L 3 Inductance L 4 Diode D 3 Diode D 4 And diode D 5 The switching inductance unit is constituted.
In the power factor correction circuit, a power switching tube S 1 ～S 3 Is an insulated gate bipolar transistor IGBT, or an integrated gate commutated thyristor IGCT, or a power field effect transistor MOSFET.
The polarity of the output voltage of the power factor correction circuit is positive, and the voltage gain is D/(2-D).
The power factor correction circuit has the following four working modes in CCM mode:
and a first working mode: the circuit operating on an ac power supply u s Positive half period, switch tube S 1 And S is 3 On, switch tube S 2 And (5) switching off. Diode D 2 、D 5 The other diodes are turned off reversely when the forward bias is turned on. Ac power supply u for this process s Inductance L 2 Charging, capacitor C 1 Discharge to inductance L 5 Charging, inductance L 2 、L 5 The current rises linearly. Inductance L 3 、L 4 Through diode D 5 Inductance L 5 Output capacitance C o And a load R L Discharge, inductance L 3 And L 4 The current drops linearly.
And a working mode II: the circuit operating on an ac power supply u s Positive half period, switch tube S 3 On, switch tube S 1 、S 2 And (5) switching off. Diode D 2 、D 3 、D 4 The other diodes are turned off reversely when the forward bias is turned on. This process inductance L 2 Discharging, capacitance C 1 Inductance L 3 And L 4 Is charged, inductance L 3 And L 4 Current rises linearly, inductance L 2 The current drops linearly. Inductance L 5 To the load R L And output capacitance C o Discharge, inductance L 5 The current drops linearly.
And the working mode is three: this isThe time circuit works in an alternating current power supply u s Negative half period, switch tube S 1 And S is 2 On, switch tube S 3 And (5) switching off. Diode D 1 、D 5 The other diodes are turned off reversely when the forward bias is turned on. Ac power supply u for this process s Inductance L 1 Charging, capacitor C 1 Discharge to inductance L 5 Charging, inductance L 1 、L 5 The current rises linearly. Inductance L 3 And L 4 Through diode D 5 Inductance L 5 Output capacitance C o And a load R L Discharge, inductance L 3 And L 4 The current drops linearly.
And the working mode is four: the circuit operating on an ac power supply u s Negative half period, switch tube S 2 On, switch tube S 1 、S 3 And (5) switching off. Diode D 1 、D 3 、D 4 The other diodes are turned off reversely when the forward bias is turned on. This process inductance L 1 Discharging, capacitance C 1 Inductance L 3 And L 4 Is charged, inductance L 3 And L 4 Current rises linearly, inductance L 1 The current drops linearly. Inductance L 5 To the load R L And output capacitance C o Discharge, inductance L 5 The current drops linearly.
The invention discloses a Cuk type power factor correction circuit based on a switching inductance, which has the following technical effects:
1) The voltage gain of the power factor correction circuit is changed from M=D/(1-D) of the traditional Cuk PFC converter to M=D/(2-D), and the converter is in a buck mode in the full duty ratio range. Under the condition of high voltage reduction ratio, the reverse recovery problem of the switching tube is solved, and the output voltage is stabilized and the efficiency is improved.
2) The power factor correction circuit of the invention introduces the switching inductance unit, so that the input power supply current and the output load current are continuous, the pulsation is smaller, and the power factor correction circuit is beneficial to filtering input and output and improving the power factor.
3) The power factor correction circuit realizes positive polarity voltage output, and has wider application scene; the output voltage sampling circuit does not need an inverter, which is beneficial to reducing the volume of the converter and the cost.
4) The power factor correction circuit adopts a bridgeless structure, reduces on-state loss and is beneficial to improving the overall efficiency of the converter.
Drawings
The invention is further described below with reference to the drawings and examples.
Fig. 1 is a main topology structure diagram of a Cuk type power factor correction circuit based on a switching inductance.
Fig. 2 is a schematic diagram of a first operation mode of the Cuk type power factor correction circuit based on the switching inductance according to the present invention.
Fig. 3 is a schematic diagram of a second operation mode of the Cuk type power factor correction circuit based on the switching inductance according to the present invention.
Fig. 4 is a schematic diagram of a third operation mode of the Cuk type power factor correction circuit based on the switching inductance according to the present invention.
Fig. 5 is a schematic diagram of a fourth operation mode of the Cuk type power factor correction circuit based on the switching inductance according to the present invention.
Fig. 5 is a schematic diagram of a fourth operation mode of the Cuk type power factor correction circuit based on the switching inductance according to the present invention.
Fig. 6 is a steady-state key waveform diagram of a Cuk type power factor correction circuit based on a switching inductance according to the present invention.
Fig. 7 is a voltage gain comparison schematic diagram of a Cuk type power factor correction circuit based on a switching inductance and a conventional Cuk PFC converter according to the present invention.
Fig. 8 is a waveform diagram of input side voltage and current in steady state of Cuk type power factor correction circuit based on switching inductance according to the present invention.
Fig. 9 is a waveform diagram of voltage and current at the output side of the Cuk type power factor correction circuit based on the switching inductance in the steady state condition.
Detailed Description
As shown in FIG. 1, the Cuk type power factor correction circuit based on the switching inductance of the invention comprises a switching tube S 1 ～S 3 Diode D 1 ～D 5 Inductance L 1 ～L 5 Capacitance C 1 、C o ；
The converter inductance L 3 、L 4 Diode D 3 、D 4 And D 5 Forming a switching inductance unit;
AC power supply u s One side is respectively connected with a switch tube S 3 Source electrode, inductance L 1 One end of the inductor L 1 The other end is connected with a diode D 1 A cathode; AC power supply u s The other side is respectively connected with a switch tube S 2 Source electrode, inductance L 2 One end of the inductor L 2 The other end is connected with a diode D 2 A cathode;
capacitor C 1 The cathodes are respectively connected with a diode D 1 、D 2 Anode and switch tube S 1 A source electrode;
inductance L 5 One end of (a) is respectively connected with a capacitor C 1 Positive electrode and diode D 3 Cathode, inductance L 3 Is one end of the inductance L 5 And the other end of (C) and the output capacitor C o The positive electrode is connected;
inductance L 3 The other ends of (a) are respectively connected with a diode D 4 、D 5 A cathode;
inductance L 4 One end is respectively connected with a diode D 3 、D 5 An anode;
inductance L 4 Another end and diode D 4 Anode, switch tube S 1 、S 2 、S 3 Drain and output capacitance C o The negative electrode is connected;
output capacitor C o And the load R L And are connected in parallel.
The specific parameters of the circuit are as follows: the effective value of the input alternating voltage of the converter is 220V, the frequency is 50Hz, the switching frequency is 50kHz, the rated output power is 200W, and the direct current side outputs voltage V o =48v, inductance L 1 ＝L 2 ＝2mH、L 3 ＝L 4 ＝22uH、L 5 =100 uH, dc output side capacitance C o =1600 μf, capacitance C 1 =1μf, load resistance R L ＝11.5Ω。
The Cuk type power factor correction circuit based on the switching inductance comprises the following working modes under the steady-state operation of a CCM mode:
and a first working mode: as shown in FIG. 2, the circuit is now operating on an AC power source u s Positive half period, switch tube S 1 And S is 3 On, diode D 2 、D 5 The other semiconductor devices are turned off when the forward bias is turned on. The process supplies power to the inductor L 2 Charging, capacitor C 1 Inductance L 5 Charging, inductance L 3 And L 4 Through diode D 5 Inductance L 5 Output capacitance C o And load discharge. This process corresponds to (0-t) in FIG. 6 1 ) At the moment, the voltage relation between the two ends of the inductance in the process is as follows:
Figure BDA0003930607240000041
wherein V is C1 Is a capacitor C 1 Voltage stress, V of S1 Is a switching tube S 1 Voltage stress, V of g Is a switching tube S 1 Is provided. And all devices are assumed to be in an ideal state, the conduction voltage drop of the diode is zero, the capacitance is large enough, the equivalent series resistance is not generated, and the inductance is not generated.
And a working mode II: as shown in fig. 3, the circuit operates on an ac power supply u s Positive half period, switch tube S 3 On, diode D 2 、D 3 、D 4 The other semiconductor devices are turned off when the forward bias is turned on. This process inductance L 2 Discharging, capacitance C 1 Inductance L 3 、L 4 Is charged, inductance L 5 To load and output capacitance C o And (5) discharging. This process corresponds to (t) in FIG. 6 1 ～t 2 ) At the moment, the voltage relation between the two ends of the inductance in the process is as follows:
Figure BDA0003930607240000051
and the working mode is three: as shown in FIG. 4, at this timeThe circuit operating on an ac power supply u s Negative half period, switch tube S 1 And S is 2 On, diode D 1 、D 5 The other semiconductor devices are turned off when the forward bias is turned on. The process supplies power to the inductor L 1 Charging, capacitor C 1 Inductance L 5 Charging, inductance L 3 And L 4 Through diode D 5 Inductance L 5 Output capacitance C o And load discharge. This process corresponds to (0-t) in FIG. 6 1 ) At the moment, the voltage relation between the two ends of the inductance in the process is as follows:
Figure BDA0003930607240000052
and the working mode is four: as shown in fig. 5, the circuit operates on an ac power supply u s Negative half period, switch tube S 3 On, diode D 1 、D 3 、D 4 The other semiconductor devices are turned off when the forward bias is turned on. This process inductance L 1 Discharging, capacitance C 1 Inductance L 3 、L 4 Is charged, inductance L 5 To load and output capacitance C o And (5) discharging. This process corresponds to (t) in FIG. 6 1 ～t 2 ) At the moment, the voltage relation between the two ends of the inductance in the process is as follows:
Figure BDA0003930607240000053
voltage gain analysis when the converter works stably:
switch tube S 1 The working switching period is T S Duty ratio D, i.e. duty mode-duration DT S The second duration of the working mode is (1-D) T S . From the inductance volt-second balance characteristics, it is possible to obtain:
Figure BDA0003930607240000054
the combined type (1) and (2) can be obtained:
Figure BDA0003930607240000055
the voltage gain of the power factor correction circuit is as follows:
Figure BDA0003930607240000056
the buck gain curve of the Cuk type power factor correction circuit based on the switch inductance is shown in fig. 7. As can be seen from fig. 7, the converter of the present invention is in buck mode throughout the duty cycle range. In the buck mode, compared with the traditional Cuk PFC converter, the converter has wider duty ratio range, and the limit duty ratio condition of a switching tube is effectively avoided.
Fig. 8 is a voltage-current waveform diagram of the input side of the Cuk type power factor correction circuit based on the switching inductance in the steady state. For visual comparison with the voltage waveform, the current waveform in the figure is the result of multiplying the actual value by 30 times the gain. It can be seen that the input voltage is in phase with the input current and both are sine waves, verifying the feasibility of power factor correction.
Fig. 9 is a waveform diagram of voltage and current at the output side of the Cuk type power factor correction circuit based on the switching inductance in the present invention in steady state. The output voltage is stabilized at about 48V, and the output current waveform is smooth.
Compared with the traditional Cuk PFC converter, the Cuk type power factor correction circuit based on the switching inductance realizes positive voltage output, improves voltage reduction gain, ensures that the voltage reduction state is maintained in the full duty ratio range, has larger duty ratio than the traditional Cuk PFC converter under the condition of high voltage reduction ratio, and effectively avoids the occurrence of limit duty ratio. By adopting the bridgeless structure, lower on-state loss can be realized. The Cuk type power factor correction circuit based on the switching inductance has continuous input and output current, high power factor and high efficiency and has great practical value.

Claims (5)

1. Cuk type power factor correction circuit based on switching inductance comprises an alternating current power supply u s Switch tube S 1 ~S 3 Diode D 1 ~D 5 Inductance L 1 ~L 5 Capacitance C 1 、C o The method is characterized in that:
AC power supply u s One side is respectively connected with a switch tube S 3 Source electrode, inductance L 1 One end of the inductor L 1 One end and the other end are connected with a diode D 1 A cathode;
AC power supply u s The other side is respectively connected with a switch tube S 2 Source electrode, inductance L 2 One end of the inductor L 2 The other end is connected with a diode D 2 A cathode;
capacitor C 1 The cathodes are respectively connected with a diode D 1 Anode, diode D 2 Anode, switch tube S 1 A source electrode;
inductance L 5 One end of (a) is respectively connected with a capacitor C 1 Positive electrode and diode D 3 Cathode, inductance L 3 Is one end of the inductance L 5 And the other end of (C) and the output capacitor C o The positive electrode is connected;
inductance L 3 The other ends of (a) are respectively connected with a diode D 4 Cathode, diode D 5 A cathode;
inductance L 4 One end is respectively connected with a diode D 3 Anode, diode D 5 An anode; inductance L 4 The other ends are respectively connected with a diode D 4 Anode, switch tube S 1 Drain electrode, switch tube S 2 Drain electrode, switch tube S 3 Drain, output capacitance C o A negative electrode;
output capacitor C o And the load R L And are connected in parallel.
2. The Cuk-type power factor correction circuit based on switching inductance according to claim 1, wherein: in the power factor correction circuit, an inductance L 3 Inductance L 4 Diode D 3 Diode D 4 And diode D 5 The switching inductance unit is constituted.
3. The Cuk-type power factor correction circuit based on switching inductance according to claim 1, wherein: in the power factor correction circuit, a power switching tube S 1 ~S 3 Is an insulated gate bipolar transistor IGBT, or an integrated gate commutated thyristor IGCT, or a power field effect transistor MOSFET.
4. The Cuk-type power factor correction circuit based on switching inductance according to claim 1, wherein: the polarity of the output voltage of the power factor correction circuit is positive, and the voltage gain is D/(2-D).
5. The Cuk-type power factor correction circuit based on switching inductance according to claim 1, wherein: the power factor correction circuit has the following four working modes:
and a first working mode: the circuit operating on an ac power supply u s Positive half period, switch tube S 1 And S is 3 On, switch tube S 2 Turning off; diode D 2 、D 5 Forward bias on, and the rest diodes are reverse cut off; ac power supply u for this process s Inductance L 2 Charging, capacitor C 1 Discharge to inductance L 5 Charging, inductance L 2 、L 5 The current rises linearly; inductance L 3 、L 4 Through diode D 5 Inductance L 5 Output capacitance C o And a load R L Discharge, inductance L 3 And L 4 The current drops linearly;
and a working mode II: the circuit operating on an ac power supply u s Positive half period, switch tube S 3 On, switch tube S 1 、S 2 Turning off; diode D 2 、D 3 、D 4 Forward bias on, and the rest diodes are reverse cut off; this process inductance L 2 Discharging, capacitance C 1 Inductance L 3 And L 4 Is charged, inductance L 3 And L 4 Current rises linearly, inductance L 2 The current drops linearly; inductance L 5 To the load R L And output capacitance C o Discharge, inductance L 5 The current drops linearly;
and the working mode is three: at this time, the circuit operates at an AC power supply u s Negative half period, switch tube S 1 And S is 2 On, switch tube S 3 Turning off; diode D 1 、D 5 Forward bias on, and the rest diodes are reverse cut off; ac power supply u for this process s Inductance L 1 Charging, capacitor C 1 Discharge to inductance L 5 Charging, inductance L 1 、L 5 The current rises linearly; inductance L 3 And L 4 Through diode D 5 Inductance L 5 Output capacitance C o And a load R L Discharge, inductance L 3 And L 4 The current drops linearly;
and the working mode is four: the circuit operating on an ac power supply u s Negative half period, switch tube S 2 On, switch tube S 1 、S 3 Turning off; diode D 1 、D 3 、D 4 Forward bias on, and the rest diodes are reverse cut off; this process inductance L 1 Discharging, capacitance C 1 Inductance L 3 And L 4 Is charged, inductance L 3 And L 4 Current rises linearly, inductance L 1 The current drops linearly; inductance L 5 To the load R L And output capacitance C o Discharge, inductance L 5 The current drops linearly.
CN202211385789.8A 2022-11-07 2022-11-07 Cuk type power factor correction circuit based on switching inductance Pending CN116191858A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116780898A (en) * 2023-08-14 2023-09-19 深圳市恒运昌真空技术有限公司 High-gain Cuk converter and control method thereof
CN117060708A (en) * 2023-08-21 2023-11-14 哈尔滨工业大学 Single-stage bridgeless PFC converter and control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116780898A (en) * 2023-08-14 2023-09-19 深圳市恒运昌真空技术有限公司 High-gain Cuk converter and control method thereof
CN116780898B (en) * 2023-08-14 2023-11-21 深圳市恒运昌真空技术有限公司 High-gain Cuk converter and control method thereof
CN117060708A (en) * 2023-08-21 2023-11-14 哈尔滨工业大学 Single-stage bridgeless PFC converter and control method

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