Totem pole pfc circuit, pulse control method, air conditioner and storage medium

A pulse control, totem pole technology, applied in electrical components, high-efficiency power electronic conversion, output power conversion devices, etc., can solve the problems of low efficiency of totem pole PFC circuit, reduce switching loss, reduce switching times, improve The effect of efficiency

Active Publication Date: 2020-02-11
GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a totem pole PFC circuit, a pulse control method, an air conditioner and a storage medium, aiming at solving the technical problem that the efficiency of the existing totem pole PFC circuit is low

Method used

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  • Totem pole pfc circuit, pulse control method, air conditioner and storage medium
  • Totem pole pfc circuit, pulse control method, air conditioner and storage medium
  • Totem pole pfc circuit, pulse control method, air conditioner and storage medium

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no. 1 example

[0120] Based on the first embodiment, a second embodiment of the pulse control method of the present invention is proposed. In this embodiment, after step S120, the pulse control method further includes:

[0121] Step S160, when the current effective value is less than or equal to the first preset current, determine whether the current effective value is greater than the second preset current;

[0122] Step S170, when the effective value of the current is greater than the second preset current, determine whether the input voltage at the input terminal is in the positive half cycle after positive and negative switching;

[0123] Step S180, when the input voltage at the input terminal is in the positive half cycle after positive and negative switching, control the first switch unit, the second switch unit and the third switch unit to be turned off, control the fourth switch unit to be turned on, and based on The second preset conduction times control the second switch unit and t...

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Abstract

A totem pole PFC circuit is disclosed and includes a bridge circuit, a reactor, a bus capacitor and a control module, the control module is used for controlling the switching state of each switching unit and the conduction times of each switching unit according to the input voltage of the input terminal of the bridge circuit and the current effective value of the input current when the input current of the input terminal of the bridge circuit is less than or equal to the preset current threshold. The invention also discloses a pulse control method, an air conditioner and a storage medium. Theinvention realizes setting appropriate on-times for each switching unit according to the current effective value, so as to reduce switching loss and improve efficiency of totem pole PFC circuit on thepremise of meeting current harmonic requirements of totem pole PFC circuit and improving power factor of totem pole PFC circuit.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a totem pole PFC circuit, a pulse control method, an air conditioner and a storage medium. Background technique [0002] With the development of power electronics technology, active PFC (Power Factor Correction, power factor correction) technology has been widely used due to its advantages of high power factor, small harmonic current, and stable output voltage. [0003] At present, the BOOST type PFC is generally used. This kind of PFC has a simple structure and convenient control, but its efficiency is relatively low. Therefore, in some occasions that require high efficiency, a bridgeless totem pole PFC circuit is used, which reduces the number of devices on the loop and improves efficiency. [0004] In the existing totem-pole PFC circuit, the times of switching on / off predetermined switching units in each half cycle are controlled by the power supply voltage, and the ...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H02M1/42
CPCH02M1/4233Y02B70/10
Inventor曾贤杰
OwnerGD MIDEA AIR-CONDITIONING EQUIP CO LTD