AUXILIARY SOURCE CIRCUIT,申请号WO2011CN77547-传众专利搜索

AUXILIARY SOURCE CIRCUIT

申请公布号：WO2012113201(A1)

申请号：WO2011CN77547

申请日期：2011.07.25

申请公布日期：2012.08.30

申请人：

INVENTRONICS (HANGZHOU) CO., LTD.;HUA, GUICHAO;LIU, YA;JIANG, DELAI

发明人：HUA, GUICHAO;LIU, YA;JIANG, DELAI

分类号：H05B37/02

主分类号：H05B37/02

摘要：An auxiliary source circuit is disclosed, comprising: a chopper switch, a clamping circuit and a capacitor; the high potential terminal of the clamping circuit is connected to the second terminal of a switching tube inside of the chopper switch, and the low potential terminal of the clamping circuit is connected to the ground; one terminal of the capacitor is connected to the low potential terminal of the clamping circuit, and the other terminal of the capacitor is connected to the second terminal of the switching tube inside of the chopper switch; as the chopper switch is on, the clamping circuit charges the capacitor, and as the chopper switch is off, the capacitor is not charged; and the voltage on the capacitor is the output voltage of the auxiliary source circuit. In the auxiliary source circuit of the invention, the auxiliary power source is obtained as the chopper switch is on, the minimum chopped angle is not needed, and thus the problem of electromagnetic interference is eliminated.