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A rectifier for power factor correction at the receiving end of a wireless power transmission system

A power factor correction and wireless power transmission technology, which is applied in the direction of output power conversion device, AC power input conversion to DC power output, electrical components, etc., can solve the problems of energy loss, high cost of switching tubes, unfavorable application and promotion, etc. Achieve the effect of reducing switching frequency, reducing switching loss and the influence of parasitic parameters

Active Publication Date: 2022-05-20
GUANGDONG UNIV OF TECH
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Problems solved by technology

However, since the output voltage at the transmitting end of the wireless power transmission system is a high-frequency AC voltage, usually tens of thousands of hertz to megahertz, in order to achieve power factor correction, at the receiving end, namely figure 2 The frequency of the switching tube in the shown converter needs to reach its input voltage frequency, that is, hundreds or even thousands of times of the output voltage frequency of the transmitting end of the wireless power transmission system. In terms of current semiconductor technology, the cost of switching tubes with such a frequency is relatively low. High, not conducive to the application and promotion of the industry
In addition, due to the switching loss of the switching device, the high-frequency hard switching conduction method will cause huge energy loss and greatly reduce the system efficiency
In addition, because high-frequency circuits must consider the influence of parasitic parameters, it will also bring difficulties to circuit design and electromagnetic compatibility design

Method used

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  • A rectifier for power factor correction at the receiving end of a wireless power transmission system
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  • A rectifier for power factor correction at the receiving end of a wireless power transmission system

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Embodiment Construction

[0039] The present application provides a power factor correction rectifier at the receiving end of a wireless transmission system for reducing the loss of switching devices, avoiding the problem of potential parasitic parameters brought by high-frequency circuits, and realizing power factor correction of the current continuous conduction type to reduce harmonic effects.

[0040] To make the object, technical solution and advantages of embodiments of the present invention more clear, the following will be combined with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described, obviously, the embodiments described are part of the embodiments of the present invention, not all embodiments. Based on embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work, are within the scope of protection ...

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Abstract

The invention discloses a power factor correction rectifier at the receiving end of a wireless power transmission system. The front stage of the invention utilizes the principle of resonance between the inductance and the capacitance to realize the power factor correction technology of the medium and high frequency current continuous conduction mode. By reducing the switching frequency, the switching loss is reduced, and the influence of high-frequency parasitic parameters is reduced. A variety of DC-DC converters, such as Buck converters, Buck-Boost converters, and Zeta converters, can be connected to the post-stage to flexibly control the output voltage.

Description

Technical field [0001] The present invention relates to the field of AC-DC power factor correction, in particular to a power factor correction rectifier at the receiving end of a wireless transmission system Background [0002] With the maturity and wide application of power electronics technology and wireless transmission technology, AC-DC rectifier converters have been rapidly developed. At the same time, due to the increasing requirements of users and manufacturers for the power density of converters, the development of power electronics technology tends to be high-frequency. Please refer to Figure 1 ， Figure 1 For the structure of the traditional full-bridge rectifier schematic, the full-bridge rectifier in the prior art consists of four uncontrollable diodes, resulting in a very low input current power factor, damaging the power quality and overall efficiency of the system, and bringing harmonic pollution and electromagnetic interference, affecting the operation of other equ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/217H02M1/42
CPCH02M7/217H02M1/42Y02B70/10
Inventor 张桂东曾俊铭
Owner GUANGDONG UNIV OF TECH
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