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Totem pole bridgeless power factor correction circuit control method and device

A power factor correction and circuit control technology, which is applied in the direction of output power conversion devices, electrical components, high-efficiency power electronics conversion, etc., can solve problems such as reverse, input bridge arm rectifier reverse current loss, etc., to prevent reverse Loss, prevent inductive current reverse problem, low cost effect

Active Publication Date: 2017-09-22
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The main technical problem to be solved by the present invention is to provide a totem pole bridgeless power factor correction circuit control method and device to solve the problem of reverse loss or reverse loss in the input bridge arm rectifier tube when the inductor current drops to zero in the totem pole bridgeless PFC The problem of reverse current

Method used

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  • Totem pole bridgeless power factor correction circuit control method and device
  • Totem pole bridgeless power factor correction circuit control method and device
  • Totem pole bridgeless power factor correction circuit control method and device

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Embodiment 1

[0071] For the totem pole bridgeless PFC control method provided in this embodiment, please refer to image 3 , which specifically includes the following steps:

[0072] Step 1, obtaining the working mode of the totem pole bridgeless power factor correction circuit;

[0073] Step 2, obtaining the first duty ratio of the main pipe and the second duty ratio of the freewheel tube according to the working mode;

[0074] Step 3, controlling the working states of the main pipe and the freewheel tube according to the first duty cycle and the second duty cycle.

[0075] For step 1, for a totem pole bridgeless power factor correction circuit, the working mode of the totem pole bridgeless power factor correction circuit must be obtained first, so as to adopt different methods for the totem pole bridgeless power factor correction circuit in different working modes To obtain the duty cycle of the circuit supervisor and the freewheeling tube, the method of obtaining the working mode, ple...

Embodiment 2

[0099] This embodiment provides a totem pole bridgeless power factor correction circuit control device, please refer to Image 6 , which specifically include:

[0100] The first acquisition module 11, the first acquisition module 11 is used to acquire the working mode of the totem pole bridgeless power factor correction circuit;

[0101] The second acquisition module 12, the second acquisition module 12 is used to acquire the first duty cycle corresponding to the main tube in the totem pole bridgeless power factor correction circuit and the corresponding first duty ratio of the freewheel tube in the totem pole bridgeless power factor correction circuit in the working mode. The second duty cycle;

[0102] A control module 13, the control module 13 is used for controlling the working states of the main pipe and the freewheel tube according to the first duty ratio and the second duty ratio.

[0103] Specifically, for a totem pole bridgeless power factor correction circuit, it i...

Embodiment 3

[0119] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following will combine figure 1 , take the input L as positive and N as negative, that is, Q2 is the supervisor, and Q1 is the freewheeling tube. The specific implementation of the DCM, CRM, and CCM modes of the present invention will be further described in detail. Obviously, the described embodiment is only the present invention. Invent some embodiments, but not all embodiments. 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.

[0120] If the totem pole bridgeless power factor correction circuit is in DCM or CRM mode, when the DCM mode and CRM mode, the control method provided by the patent of the present invention is the same, but the totem pole bridgeless power factor correction circuit in these two modes has...

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Abstract

The invention discloses a totem pole bridgeless power factor correction circuit control method and device. The working mode of a totem pole bridgeless power factor correction circuit is acquired; the first duty ratio corresponding to a main tube in the totem pole bridgeless power factor correction circuit and the second duty ratio corresponding to a fly-wheel tube under the working mode are acquired; and the working state of the main tube and the fly-wheel tube is controlled according to the first duty ratio and the second duty ratio. The fly-wheel tube is turned off before zero crossing of inductive current so that the reverse loss of the input bridge arm rectifier tube and the reverse problem of the inductive current in the declining process of the inductive current can be prevented. Compared with application of the hardware zero crossing detection circuit, the totem pole bridgeless power factor correction circuit control method and device have no additional arrangement of hardware circuit so that the cost is low, the method and the device are simple, the space utilization rate is high and the overall efficiency of the circuit can be enhanced.

Description

technical field [0001] The invention relates to the field of switching power supply power electronics, in particular to a control method and device for a totem pole bridgeless power factor correction circuit. Background technique [0002] With the development of industry, the call for green energy saving is increasing day by day, and the field of power electronics is also actively developing more energy-saving products with high efficiency; Energy consumption is very important, and its conversion efficiency directly affects the energy consumption level of the main equipment. PFC (Power Factor Correction, power factor correction technology), as the input stage of the power supply, is the bridge connecting the grid and the output of the power supply. Its quality not only affects the power output quality of the power supply, but also is crucial to the power quality of the grid. Its conversion efficiency, It directly affects the efficiency of the whole power supply. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02M1/38
CPCH02M1/38H02M1/4208H02M1/0048H02M1/4233H02M1/42Y02B70/10H02M1/0085
Inventor 孙浩何维卢至锋江洪波
Owner ZTE CORP
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