Patent ID: 8736238
Filing Date: 2014-05-27
Classification: H02M,Y02B

Abstract:
1. A converter system, comprising: a bridge rectifier having first and second input terminals, and first and second output terminals, receiving an AC input voltage and outputting a rectified DC voltage; a first auxiliary circuit, comprising: a storing and absorbing circuit having a first terminal coupled to the second terminal of the first unidirectional switch and a second terminal coupled to the second output terminal of the bridge rectifier; a first capacitor having a first terminal coupled to the first terminal of the second unidirectional switch and a second terminal; a converter circuit outputting a DC bus voltage and having a first input terminal coupled to the first terminal of the first unidirectional switch, a second input terminal coupled to the second output terminal of the bridge rectifier, a first output terminal coupled to the first terminal of the second unidirectional switch and a second output terminal, wherein the first and the second output terminals are coupled to the first capacitor in parallel; an EMI filter receiving the AC input voltage and coupled to the first and the second input terminals of the bridge rectifier in parallel; a DC/DC converter having a first and a second input terminals, and an output terminal outputting a DC output voltage; and a DC power source having a first input terminal coupled to the second terminal of the second unidirectional switch, a second input terminal coupled to the second output terminal of the bridge rectifier, and an output terminal outputting a standby voltage, wherein the first capacitor is an output capacitor, the DC power source is a standby power source, and the first and the second input terminals of the DC/DC converter are respectively coupled to the first terminal of the second unidirectional switch and the second output terminal of the converter circuit, and receive the DC bus voltage.