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Power factor correction circuit

A power factor correction and circuit technology, which is applied to circuit devices, battery circuit devices, output power conversion devices, etc. The effect of low loss and low cost

Pending Publication Date: 2020-05-12
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional power factor correction method is realized by passive devices. However, in a circuit with high power, passive devices will occupy a large volume, high cost, high loss, and large current ripple.

Method used

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Embodiment Construction

[0022] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.

[0023] The invention provides an interleaved power factor correction circuit, which improves the structure of the traditional power factor correction circuit, saves cost and can further improve the overall efficiency. Such as figure 1 As shown, a power factor correction circuit includes a PFC circuit, a main control unit, an input voltage and current detection circuit, an output voltage detection circuit, and a mos tube current detection circuit; the AC input power is connected to the input end of the PFC circuit through a rectification filter circuit, The output terminal of the PFC circuit outputs the voltage signal after power adjustment through the filter circuit, and the input voltage and current detection circuit is used to detect the input voltage and current signal at the input termi...

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Abstract

The invention discloses a power factor correction circuit. The circuit comprises a PFC circuit, a main control unit, an input voltage and current detection circuit, an output voltage detection circuitand a mos tube current detection circuit. The AC input power supply is connected with the input end of the PFC circuit through the rectification filter circuit. The output end of the PFC circuit outputs a voltage signal after power adjustment through a filter circuit. The input voltage and current detection circuit is used for detecting input voltage and current signals of the input end of the PFC circuit. The output end is connected with the input end of the main control unit; the output voltage detection circuit is used for detecting the voltage of the output end of the PFC circuit. The output end of the MOS tube current detection circuit is connected with the input end of the main control unit, the MOS tube current detection circuit is used for detecting the input current of the MOS tube in the PFC circuit, the output end of the MOS tube current detection circuit is connected with the input end of the main control unit, and the output end of the main control unit is connected withthe PFC circuit through the driving circuit. The system is simple in structure, stable and reliable in circuit and capable of effectively improving system efficiency.

Description

technical field [0001] The invention relates to the field of electric energy charging efficiency of wireless charging, in particular to a power factor correction circuit. Background technique [0002] Wireless charging technology is currently on the rise, and most of the research fields focus on wireless charging coils and other fields, but one of the disadvantages of wireless charging technology is that the low efficiency of the entire system limits its development. If you want to achieve greater development, then its efficiency in the entire system It needs to reach 85% to compete with existing charging products, so there is a need to improve efficiency from all aspects of the product. Therefore, a high-efficiency power factor correction device is essential. [0003] The traditional power factor correction method is implemented by passive devices. However, in a circuit with high power, passive devices will occupy a large volume, high cost, high loss, and large current rip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/42H02J7/02H02J50/70
CPCH02J50/70H02M1/4208Y02B70/10
Inventor 高文根鲁麟倪天明张港於跃吴铭辉
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE