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Totem-pole bridgeless power factor conversion device and method of operating the same

A power factor, conversion device technology, applied in the output power conversion device, the conversion of AC power input to DC power output, high-efficiency power electronic conversion, etc. high loss problem

Active Publication Date: 2020-10-23
CHICONY POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In all these different power factor conversion devices, due to the high number of components used, the loss of internal components conducting energy is high, making the efficiency relatively low, and it cannot effectively reduce the cost-effectiveness

Method used

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  • Totem-pole bridgeless power factor conversion device and method of operating the same
  • Totem-pole bridgeless power factor conversion device and method of operating the same
  • Totem-pole bridgeless power factor conversion device and method of operating the same

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Embodiment Construction

[0064] Hereby, the technical content and detailed description of the present invention are described as follows in conjunction with the accompanying drawings:

[0065] see figure 1 It is a schematic block diagram of the totem pole bridgeless power factor conversion device of the present invention. The converting device 100 receives the input power Pin, and converts the input power Pin to the output power Po, so as to supply power to a load (not shown). The conversion device 100 includes a conversion unit 10 , a control unit 20 , a current detection unit 30 and a phase detection unit 40 , and the circuit structure of the conversion unit 10 is a totem-pole bridgeless converter. The conversion unit 10 receives the input power Pin and provides the output power Po to the load (not shown). The current detection unit 30 is coupled to the input end of the conversion unit 10 and the control unit 20 , and detects the current signal Si of the input power supply Pin. The phase detectio...

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Abstract

A totem-pole bridgeless power factor conversion device and a method of operating the same are disclosed. The totem-pole bridgeless power factor conversion device includes a conversion unit, a controlunit, a current detecting unit and a phase detecting unit. When the control unit determines that a peak value of an input current is within a predetermined interval between a positive current value and a negative current value based on a current signal of the current detecting unit and a phase signal of the phase detecting unit, the control unit controls the conversion unit to operate in a discontinuous conduction mode. When the control unit determines that the peak value of the input current is not within the predetermined interval, the control unit controls the conversion unit to operate ina critical conduction mode.

Description

technical field [0001] The invention relates to a totem-pole bridgeless power factor conversion device and an operation method thereof, in particular to a totem-pole bridgeless power factor conversion device with the function of changing the operation mode and an operation method thereof. Background technique [0002] Due to the rapid development of power electronics with the advancement of power semiconductor technology in recent years, the efficiency of power conversion systems has become more and more important. Especially in the current specification, the efficiency of the power conversion system needs to reach 96% in order to meet the safety certification. Therefore, the power conversion system must have the function of power factor correction, in order to improve the efficiency of the power conversion system and meet the safety regulations. [0003] The traditional power conversion system with power factor correction function is usually composed of a power factor corr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42
CPCH02M1/4233H02M7/162Y02B70/10H02M1/0009H02M1/42H02M1/088
Inventor 黄文楠陈庆国
Owner CHICONY POWER TECH CO LTD