Delta Electronics, Inc.

Asian Power Devices Inc.

Wei Tang

Zhongwang Yang

Yang Leng

Wenhua Li

Ganghong Liu

Yankai Liu

The present disclosure provides a power converter including a first capacitor, a second capacitor, and a power module. The first capacitor and the second capacitor are connected in series. The power module is electrically connected to the first capacitor and the second capacitor and includes a circuit board, an absorption capacitor, a primary switch circuit, a magnetic component, and a secondary circuit. The absorption capacitor, the primary switch circuit, the magnetic component and the secondary circuit are disposed on the circuit board. A primary winding and a secondary winding of the magnetic component are electrically connected to the primary switch circuit and the secondary circuit respectively.

Power converter

An active damping circuit of dead time oscillation includes a damping unit, a main switch, a voltage biased unit, an auxiliary switch, and a voltage determining unit. The main switch is coupled to the damping unit. The voltage biased unit is coupled to the damping unit and the main switch, and the voltage biased unit provides a drive voltage to the main switch. The auxiliary switch is coupled to the voltage biased unit. The voltage determining unit is coupled to the auxiliary switch, the voltage biased unit, and the damping unit, and the voltage determining unit provides a threshold voltage. When a voltage across two ends of a winding of a transformer is less than the threshold voltage, the auxiliary switch is turned off so that the drive voltage turns on the main switch and enable the damping unit to suppress the dead time oscillation.

Active damping circuit of dead time oscillation

Growing community of inventors

Taoyuan, Taiwan

Wei Tang