| 摘要 |
An oscillation control part composed of a control switching element and a damping resistance connected in parallel is arranged between an input power supply and a main switching element of a power conversion circuit, and the control switching element and the main switching element have a relationship such as Ron(S2)<E(Rg)×fsw/(D×I2), and the main switching element is turned off and after a current of the main switching element has become zero, the control switching element is turned off to prevent a high-frequency oscillation generated between a parasitic inductance of the circuit and a junction capacitance of the main switching element, with a damping resistance. |
