Phase dislocation control single-stage power factor correction control circuit and switching power supply

A power factor correction and control circuit technology, applied in the direction of control/regulation system, high-efficiency power electronic conversion, output power conversion device, etc., can solve the problem of excessive bus current ripple, output power reduction, input current ripple, etc. problem, achieve the effect of reducing ripple current, reducing peak value and effective value, and low circuit cost

CN112366933AInactive Publication Date: 2021-02-12安徽乐图电子科技股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-02-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a phase dislocation control single-stage power factor correction control circuit and a switching power supply, and the circuit comprises a power grid input Vin, a rectifier bridge DB, a capacitor C1, a capacitor C2, a capacitor C3, a switching tube S1, a switching tube S2, a switching tube S3, a switching tube S4, a switching tube S5, a switching tube S6, a diode D1, a diode D2, an inductor L1, an inductor L2, a transformer T1, a first output rectification circuit, an output capacitor Co, a power factor correction phase dislocation control circuit and a resonance phasedislocation control drive circuit. The invention has the beneficial effects that circuit device overstress can be prevented, a power factor correction function is achieved, the design of the filter issimplified, and the service life of the capacitor is prolonged; and the circuit is simple, convenient to control and low in cost, can well consider bus capacitor voltage and power factors, and can besuitable for wider input and output load ranges.
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Description

technical field

[0001] The invention relates to the technical field of circuits and switching power supplies, in particular to a phase-staggered control single-stage power factor correction control circuit and a switching power supply. Background technique

[0002] In the field of power supply, driving power supply with high power density, high efficiency and low cost is more competitive. Usually the drive power will choose a resonant circuit to achieve high power density and high efficiency. The resonant circuit can realize the zero-voltage turn-on of two or more switching tubes on the primary side and the zero-current turn-off of the rectifier diode on the secondary side, which can reduce the switching loss of the power supply and improve the efficiency and power density of the power converter. At the same time, in order to improve the power factor, an active PFC power factor correction circuit is often added in the front stage of the resonant circuit, but this will lead ...

Examples

Embodiment 1

[0032] Now in conjunction with accompanying drawing and specific embodiment the present invention is further described, as figure 1As shown, the single-stage power factor correction control circuit with phase error control according to the embodiment of the present invention includes grid input Vin, rectifier bridge DB, capacitor C1, capacitor C2, capacitor C3, switch tube S1, switch tube S2, switch tube S3, Switch tube S4, switch tube S5, switch tube S6, diode D1, diode D2, inductor L1, inductor L2, transformer T1, first output rectifier circuit, output capacitor Co, power factor correction phase error control circuit and resonance phase error control drive circuit; the grid input Vin is connected to the first end and the third end of the rectifier bridge DB, and the second end of the rectifier bridge DB is connected to the positive pole of the capacitor C1, the first end of the switch tube S1 and the The first end of the switching tube S5 is connected, the second end of the ...

Embodiment 2

[0041] Such as Figure 4 As shown, the single-stage power factor correction control circuit according to the embodiment of the present invention includes a grid input Vin, a rectifier bridge DB, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a switch tube S1, a switch tube S2, and a switch Tube S3, switch tube S4, switch tube S5, switch tube S6, switch tube S7, diode D1, diode D2, inductor L1, inductor L2, transformer T1, first output rectifier circuit, second output rectifier circuit, output capacitor Co, Current transformer CT1, capacitor C3, power factor correction out-of-phase control circuit and resonant out-of-phase control drive circuit; wherein, the grid input Vin is connected to the first end and the third end of the rectifier bridge DB, and the rectifier bridge The second end of DB is sequentially connected to the positive pole of the capacitor C1, the first end of the switch tube S1 and the first end of the switch tube S5, and the second end of the ...