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Power factor correction circuit adopting coupled induction

A technology of coupling inductors and circuits, which is applied in the direction of output power conversion device, reactive power adjustment/elimination/compensation, DC power input conversion to DC power output, etc. Reliability and other issues, to achieve the effect of facilitating EMC design, easy production, and suppressing interference

Inactive Publication Date: 2007-06-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of equal sharing is conditional. It is necessary to ensure that the impedance of each parallel branch is consistent or approximate. ) such magnetic devices, if coupled inductors are used, the winding turns of each branch must be strictly the same, otherwise the current cannot be shared evenly, and even serious imbalance will be caused
In addition, the main FET (1) ~ FET (N) is hard switching, and the diode D (1) ~ D (N) has a short circuit reverse recovery current, which also increases the loss of the main tube and reduces the reliability

Method used

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  • Power factor correction circuit adopting coupled induction
  • Power factor correction circuit adopting coupled induction
  • Power factor correction circuit adopting coupled induction

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Embodiment Construction

[0024] Preferred embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, and the circuit referred to by the present invention is not limited to being applied to a PFC circuit:

[0025] In the power factor correction circuit using coupled inductors of the present invention, as shown in Figure 1, the AC terminal inputs an AC signal, and after full-wave rectification by the rectifier bridges VD1, VD2, VD3, and VD4, a DC voltage Vin is obtained, and Vin is as shown in Figure 2 The input voltage of the circuit of the present invention indicated by the dotted line box shown in , in Fig. 2, VT1 is the main switching tube, not limited to MOSFET, and can also be switching power control devices such as triode, insulated gate bipolar transistor IGBT; C1~C2 are the first The first and second capacitors, VD5~VD8 are the first to fourth diodes, L1 is the coupling inductance, the number of turns of the first coupling induct...

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Abstract

The circuit for correcting power factor includes following structure: the input of the DC voltage is connected to one end of first coupling inductance; synonymous end of the first coupling inductance is connected to anodes of first diode and second diode, as well as drain pole of a main switch tube; synonymous end of a second coupling inductance winding is connected to one end of a resonant inductance; cathode of second diode is connected to anode of fourth diode, and not synonymous end of the second coupling inductance winding; the other end of the resonant inductance is connected to cathode of first diode, anode of third diode, and one end of first capacitor. Voltage stress of all parts will not exceed PFC output voltage. Since current stress is small, the disclosed circuit possesses high reliability.

Description

technical field [0001] The invention relates to a circuit device, in particular to a power factor correction using coupled inductance technology, that is, an improvement of a PFC circuit device. Background technique [0002] Since the European implementation of EMC electromagnetic compatibility market mandatory access standards in January 1996, countries around the world have paid more and more attention to the electromagnetic compatibility of electronic equipment. The CCC standard implemented by our country also includes the content of electromagnetic compatibility. The main European standard for communication electronic equipment is EN55022. For equipment with an input current of less than 16A, the current reflection harmonic suppression EN61000-3-2 must be followed. The electromagnetic compatibility standards of various countries may be different. Fortunately, they are all based on IEC It comes from CISPR-related standards. The above-mentioned standards mainly refer to CI...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02J3/18
CPCY02E40/30Y02P80/10
Inventor 樊晓东
Owner ZTE CORP