Title:
BIDIRECTIONAL RESONANT CONVERTER MAGNETIC BALANCE CIRCUIT AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/095542
Kind Code:
A1
Abstract:
Disclosed are a bidirectional resonant converter magnetic balance circuit and a control method therefor. The bidirectional resonant converter magnetic balance circuit comprises a primary-side conversion circuit, a transformer, a secondary-side conversion circuit and a controller, which are successively connected, wherein the primary-side conversion circuit is connected to a primary-side winding W1 of the transformer by means of a first capacitor C1; a current transformer CT is arranged between a secondary-side winding of the transformer and the secondary-side conversion circuit; and according to a positive component Ipositive of the current in a cavity of the secondary-side conversion circuit and a negative component Inegative of the current in the cavity of the secondary-side conversion circuit, the positive component and the negative component being measured by the current transformer CT, the controller then controls the duty ratio of a switch in the secondary-side conversion circuit. By means of the present invention, magnetic bias at two sides of a bidirectional resonant converter is effectively eliminated, and balance control over a magnetic circuit is realized, thereby preventing saturation. A blocking capacitor on a secondary side is canceled, thereby reducing the size and cost of a device, and only a few elements are added in an original bidirectional resonant converter, thereby improving the product competitiveness.
Inventors:
FENG YINGYING (CN)
YAO SHUN (CN)
XU JINZHU (CN)
AO HUA (CN)
YAO SHUN (CN)
XU JINZHU (CN)
AO HUA (CN)
Application Number:
PCT/CN2021/113097
Publication Date:
May 12, 2022
Filing Date:
August 17, 2021
Export Citation:
Assignee:
SHENZHEN VMAX NEW ENERGY CO LTD (CN)
International Classes:
H02M1/40; H02M3/335
Foreign References:
| CN112202342A | 2021-01-08 | |||
| CN109194136A | 2019-01-11 | |||
| CN1890866A | 2007-01-03 | |||
| CN109450255A | 2019-03-08 | |||
| CN101667783A | 2010-03-10 | |||
| CN107623365A | 2018-01-23 | |||
| US20080278974A1 | 2008-11-13 |
Attorney, Agent or Firm:
SHENZHEN KANGHONG INTELLECTUAL PROPERTY AGENT CO., LTD. (CN)
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