Title:
PHASE CALIBRATION CIRCUIT AND METHOD FOR RECEIVING END, AND RECEIVING END
Document Type and Number:
WIPO Patent Application WO/2020/125112
Kind Code:
A1
Abstract:
Disclosed in the present application are a phase calibration circuit and method for a receiving end, and a receiving end, which are applied to an electric vehicle, wherein the receiving end is located on the electric vehicle. The circuit comprises: a phase measuring circuit and a controller; a first input end of the phase measuring circuit is connected to an output end of a current detection circuit, and a second input end of the phase measuring circuit is connected to an output end of a filter; the current detection circuit is used for detecting the input current of a rectifier; the filter is used for filtering the input current to obtain an input current fundamental component; a phase detecting circuit is used for obtaining the phase difference between the input current and the input current fundamental component; and the controller is used for using the result from deducting the phase difference from a preset phase shift angle as the actual phase shift angle, and controlling the phase of the bridge arm voltage of the rectifier to lag behind the phase of the input current fundamental component by the actual phase shift angle. The controller outputs a drive signal of a controllable switch transistor of the rectifier by using the actual phase shift angle. Since lagging phase as a result of filtering is compensated, the precision of synchronizing the bridge arm voltage and the input current may be improved.
Inventors:
MAO YUNHE (CN)
WU ZHIXIAN (CN)
ZENG XIAOSHENG (CN)
WU ZHIXIAN (CN)
ZENG XIAOSHENG (CN)
Application Number:
PCT/CN2019/107419
Publication Date:
June 25, 2020
Filing Date:
September 24, 2019
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H02M3/335; B60L53/12; H02J50/10
Foreign References:
| CN109672343A | 2019-04-23 | |||
| CN101557227A | 2009-10-14 | |||
| CN102005924A | 2011-04-06 | |||
| US20180342889A1 | 2018-11-29 | |||
| CN201811543560A | 2018-12-17 |
Other References:
See also references of EP 3799287A4
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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