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Power factor correction circuit soft start method and device, circuit and electric appliance

A technology of power factor correction and soft start, applied in the field of control, can solve the problems of starting resistance and the miniaturization of relay disadvantageous circuits, and achieve the effects of ensuring reliability, reducing cost and reducing charging current.

Active Publication Date: 2018-05-25
GREE ELECTRIC APPLIANCES INC +1
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  • Abstract
  • Description
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Problems solved by technology

[0003] The main purpose of the present invention is to overcome the defects of the above-mentioned prior art, and provide a soft start method, device, circuit and electrical appliance of a power factor correction circuit, so as to solve the problem that the soft start scheme in the prior art needs to increase the starting resistance and the electric current in the circuit. The problem that the relay is not conducive to the miniaturization of the circuit

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  • Power factor correction circuit soft start method and device, circuit and electric appliance
  • Power factor correction circuit soft start method and device, circuit and electric appliance
  • Power factor correction circuit soft start method and device, circuit and electric appliance

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[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embo...

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Abstract

The invention provides a power factor correction circuit soft start method and device, a circuit and an electric appliance. The method comprises the following steps: judging whether the power factor correction circuit meets a preset start condition; when the power factor correction circuit meets the preset start condition, obtaining a first bus voltage reference quantity of the power factor correction circuit; and carrying out soft start on the power factor correction circuit based on the first bus voltage reference quantity. The provided scheme can realize soft start of the PFC circuit without starting a resistor and a relay, thereby reducing circuit cost and improving reliability of the control circuit.

Description

technical field [0001] The invention relates to the field of control, in particular to a soft start method, device, circuit and electric appliance for a power factor correction circuit. Background technique [0002] Due to the large capacitance at the back end of the power factor correction (PFC) circuit, there is a large charging current on the bus at the moment of power-on, which will have a large impact on the rectifier device on the circuit, and seriously damage the rectifier device. In the prior art, there is a scheme to control the on-off of the relay in the soft-start relay circuit through the DSP controller to realize the soft start of the circuit. The DSP controller detects the DC bus voltage of the PFC circuit. When the PFC bus voltage rises to a high enough level, the DSP control The relay sends out a signal to make the relay pick up and short-circuit the soft-start resistor, thereby realizing safe and reliable soft-start of the high-power power supply. The disad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/36H02M1/32
CPCH02M1/32H02M1/36H02M1/325
Inventor 李立李宁吴文贤邓险峰
Owner GREE ELECTRIC APPLIANCES INC
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