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Method and system for power factor correction based on wireless power transfer system

A technology of power factor correction and wireless energy transmission, which is applied in the direction of output power conversion devices, energy industry, electrical components, etc., can solve the problems of complex structure, bulky structure, large volume, etc., and achieve small circuit volume, reduce pollution, improve The effect of power factor

Active Publication Date: 2018-12-18
HAIER GROUP TECHN R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The passive PFC structure is relatively simple, and the power factor can only reach 0.7~0.8, but the volume is large, the structure is heavy, and it often produces a lot of noise when working
The active PFC circuit is composed of components such as high-frequency inductors, switching tubes and capacitors. The current waveform is adjusted through a dedicated IC (integrated circuit), and the phase difference between the current and voltage is compensated. The power factor can reach more than 0.98, but the structure complex and expensive

Method used

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  • Method and system for power factor correction based on wireless power transfer system
  • Method and system for power factor correction based on wireless power transfer system
  • Method and system for power factor correction based on wireless power transfer system

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Embodiment approach

[0066] See Figure 4B , the present invention also provides another embodiment of a method for power factor correction based on a wireless power transmission system, including steps M1-M3, specifically:

[0067] Step M1, rectifying the input mains power into a sinusoidal unidirectional pulse voltage, performing inversion processing on the sinusoidal unidirectional pulse voltage, and using the inverted voltage as a switching power supply for the resonant circuit of the wireless power transmission system. For a specific embodiment, refer to step S1 in the above-mentioned embodiment, and details are not repeated here.

[0068] Step M2, acquiring the switching frequency of the switching power supply.

[0069] Step M3, adjusting the parameters of the circuit components of the resonant circuit so that the resonant frequency of the resonant circuit is consistent with the switching frequency of the switching power supply, so that the resonant circuit works in a quasi-resonant state. ...

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Abstract

The invention discloses a method and system for power factor correction based on a wireless energy transmission system. The method includes: rectifying the input commercial power into a sinusoidal one-way pulse voltage, and inverting the sinusoidal one-way pulse voltage Processing, using the voltage after inverter processing as the switching power supply of the resonant circuit of the wireless energy transmitter; adjusting the switching frequency of the switching power supply to be consistent with the resonant frequency of the resonant circuit, so that the resonant circuit works in a resonant state. The invention improves the power factor of the wireless energy transmitter and reduces the pollution of the wireless energy transmission products to the harmonic wave of the power grid. At the same time, the circuit volume of the line power transmission system is small, the cost is low and there is no noise.

Description

technical field [0001] The present invention relates to the field of wireless power transmission, in particular to a method and system for power factor correction based on a wireless power transmission system. Background technique [0002] PFC (Power Factor Correction, power factor correction) refers to the ratio of effective power divided by total power consumption (apparent power). Power factor can measure the degree of effective use of electric energy. The higher the utilization rate. [0003] The wireless power transmission system includes a wireless power transmitting unit and a wireless power receiving unit. The wireless power receiving unit is coupled through the magnetic field generated by the wireless power transmitting unit, and the magnetic field energy is converted into electric energy by a pick-up coil, thereby realizing non-contact power transmission. Since the wireless power transmitting unit is connected to the mains, in order to reduce the pollution of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/42
CPCH02M1/4241H02J50/12Y02B70/10Y02P80/10H02J50/70
Inventor 李聃龙海岸孙伟鄢海峰
Owner HAIER GROUP TECHN R&D CENT