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Control method, control device, PFC circuit, motor driving equipment and air conditioner

A control method and circuit technology, applied in the direction of controlling electromechanical brakes, controlling generators, controlling electromechanical transmission devices, etc., can solve problems such as control errors, current distortion, and switch tube damage, so as to improve work reliability, solve current distortion and The effect of fever problems

Active Publication Date: 2020-05-08
广东希塔变频技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a control method, a control device, a PFC circuit, a motor drive device and an air conditioner in order to solve the problem that the switch tube is damaged or the control error causes the current distortion when the three-phase PFC circuit based on the VIENNA rectifier is controlled.

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  • Control method, control device, PFC circuit, motor driving equipment and air conditioner
  • Control method, control device, PFC circuit, motor driving equipment and air conditioner
  • Control method, control device, PFC circuit, motor driving equipment and air conditioner

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Embodiment Construction

[0055] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, not to limit the present invention.

[0056]It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, the directional indications are only used to explain the position in a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0057] In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indications or hints Its relative importance or implicitly in...

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Abstract

The invention relates to the field of PFC control, and discloses a control method, a control device, a PFC circuit, motor driving equipment and an air conditioner. Phase current of each phase branch and direct current bus voltage output by a three-phase PFC circuit are detected; a three-phase duty ratio signal conducted by the three-phase bidirectional switch tube is determined according to the phase current and the direct current bus voltage; a bidirectional switch driving signal of the three-phase bidirectional switch tube is determined according to the three-phase duty ratio signal; and a forward switch driving signal of the forward switch tube and a reverse switch driving signal of the reverse switch tube of each phase are determined according to the phase current and the bidirectionalswitch driving signal, and the forward switch tube and the reverse switch tube are finally respectively controlled to work according to the forward switch driving signal and the reverse switch tube.The problems that in a full-conduction scheme in the prior art, a switching tube such as an IGBT generates much heat and has reverse conduction risks are solved, and the problem of current distortionin a complementary conduction mode in the prior art is solved, so that the working reliability of the whole three-phase PFC circuit is improved.

Description

technical field [0001] The invention relates to the field of PFC control, in particular to a control method, a control device, a PFC circuit, a motor drive device and an air conditioner. Background technique [0002] When the three-phase PFC circuit based on the VIENNA rectifier is applied, the control method adopted is generally the full conduction mode or the complementary conduction mode. The full conduction mode means that all the three-phase bidirectional switches in the circuit are turned on. When this control method is used to work, the switch tube will generate a lot of heat, and there is a risk of reverse conduction, resulting in damage to the switch tube. When the complementary conduction is performed, each switch tube of each phase is separately conducted when the voltage of the phase is forward or reverse. When controlling, there are factors such as delay at the zero crossing point, filter processing, and DC bias, which may easily cause voltage The misjudgment o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02P21/18H02P21/22
CPCH02M1/4233H02P21/18H02P21/22Y02B70/10
Inventor 盛爽黄勇郑长春王甫敬
Owner 广东希塔变频技术有限公司
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