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Active power factor correction DC power supply circuit and circuit method thereof

A technology of DC power supply and source power, applied in the direction of converting AC power input to DC power output, high-efficiency power electronic conversion, output power conversion device, etc., can solve problems such as limiting the performance of power factor correction circuits, and avoid adverse effects , Prevent oscillation phenomenon, shorten the effect of adjustment time

Active Publication Date: 2019-04-26
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing active power factor correction circuits use PI controllers to design and implement power factor correction control strategies, but the inherent defects of PI controllers such as time lag and bandwidth limit the further improvement of the performance of power factor correction circuits, so The present invention proposes a DC power supply technology based on energy balance relationship to realize power factor correction control

Method used

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  • Active power factor correction DC power supply circuit and circuit method thereof
  • Active power factor correction DC power supply circuit and circuit method thereof

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Embodiment 1

[0031] The active power factor correction DC power supply proposed by the present invention is composed of two major parts, a main circuit and a control circuit.

[0032] The main circuit is composed of the first and first rectification circuit 1, power electronic device M1, freewheeling diode D1, inductor L1 and capacitor C1. Among them, the power electronic device M1, the freewheeling diode D1, the inductor L1, and the capacitor C1 constitute a BUCK circuit; the control circuit is connected to the main circuit; the input end of the BUCK circuit is connected to the DC side of the first rectifier circuit 1, and the output of the BUCK circuit The terminal is connected to the external load of the power supply; the AC side of the first rectifier circuit 1 is connected to an external single-phase AC power supply.

[0033]The control circuit consists of an input current detection circuit 2, an output voltage detection circuit 3, an output current detection circuit 4, an AC voltage ...

Embodiment 2

[0055] The active power factor correction DC power supply proposed by the present invention adopts a discontinuous current control mode during operation, and its working principle is as follows:

[0056] The single-phase AC power provided by the external single-phase AC power supply is transformed into DC power by the first rectifier circuit 1, and then provides power for the BUCK circuit; the input current detection circuit 2 detects the input current of the BUCK circuit in real time, and transmits the detection data to the input energy in real time The calculation circuit 8; the output voltage detection circuit 3 detects the output voltage of the BUCK circuit in real time, and transmits the detection data to the load identification circuit 9 and the actual energy storage calculation circuit 10 of the capacitor in real time; the output current detection circuit 4 performs real-time detection of the output current of the BUCK circuit detection, and transmit the detection data t...

Embodiment 3

[0063] The first rectifier circuit 1 can be selected from existing single-phase bridge rectifier circuits of various types.

[0064] The power electronic device M1, the freewheeling diode D1, the inductor L1, and the capacitor C1 can be selected and designed with reference to the existing BUCK circuit design method.

[0065] The diode 4 can be selected from various existing freewheeling diodes that can meet the design requirements.

[0066] The input current detection circuit 2 can be designed and implemented with reference to various existing circuits with current detection and data transmission functions, for example, a Hall-type current sensor can be used supplemented by a corresponding signal processing circuit.

[0067] The output voltage detection circuit 3 can be designed and implemented with reference to various existing circuits with voltage detection and data transmission functions, for example, a Hall-type voltage sensor can be used supplemented by a corresponding s...

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Abstract

The invention discloses an active power factor correction DC power supply circuit and a circuit method thereof, belonging to the technical field of DC power supplies. The active power factor correction DC power supply circuit is composed of a main circuit and a control circuit. The main circuit is composed of a rectifier circuit 1, a power electronic device M1, a freewheeling diode D1, an inductorL1 and a capacitor C1. The power electronic device M1, the freewheeling diode D1, the freewheeling diode D1, the inductor L1 and the capacitor C1 form a BUCK circuit; the control circuit is connectedwith a main circuit, the input end of the BUCK circuit is connected with the direct current side of the rectifier circuit 1, the output end of the BUCK circuit is connected with an external load of apower supply, and the alternating current side of the rectifier circuit 1 is connected with an external single-phase alternating current power supply. An energy balance relationship in a control cycle time is a control criterion. In the control process, the energy magnitude and mutual influence relationship of each link are calculated; in the adjustment process, the quick change of energy is achieved, and the adjustment time is shortened.

Description

technical field [0001] The invention relates to the technical field of direct current power supplies, in particular to an active power factor correction direct current power supply circuit and a circuit method. Background technique [0002] The alternating current input by the direct current power supply becomes direct current after rectification and filtering, but the nonlinear load distorts the input current waveform into a pulse waveform, which contains a large number of harmonic components, resulting in a decrease in the input power factor. The generation of this problem has brought many adverse effects, such as: harmonic current pollutes the power grid and interferes with other electrical equipment; under the condition of a certain input power, the input current is relatively large, and the capacity of the input circuit breaker and power line needs to be increased wait. Therefore, in order to reduce the harmonic component of the input current of the DC power supply and...

Claims

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Application Information

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IPC IPC(8): H02M7/219H02M1/42
CPCH02M1/4208H02M7/219Y02B70/10
Inventor 张强杨威温剑桥董童鹤何昕武保成魏家植年强李鸿凯宋世豪
Owner HARBIN ENG UNIV
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