TH174884A - Power converter - Google Patents

Abstract

Edited September 12, 2017 If the capacitance of the snubber capacitor (22), the inductance of the coil (23), and the size of the resistor (21) are specified such that the resonant frequency of the snubber circuit (20) coincides with the oscillation frequency of the transistor (16), and the impedance of the first loop at the resonance frequency is less than the impedance of the second loop at the resonance frequency, then the current component due to the oscillation will flow into the snubber circuit (20), and the energy will be consumed by the resistor (21). Thus, rapid convergence of the oscillations can be achieved. Selected drawing: Figure 1 ----------

Claims (1)

1. : Edited September 12, 2017 If the capacitance of the snubber capacitor (22), the inductance of the coil (23), and the size of the resistor (21) are specified such that the resonant frequency of the snubber circuit (20) coincides with the oscillation frequency of the transistor (16), and the impedance of the first loop at the resonant frequency is less than the impedance of the second loop at the resonant frequency, then the current component due to the oscillation will flow into the snubber circuit (20), and energy will be consumed by the resistor (21). Thus, rapid convergence of the oscillations can be achieved. Selected drawing: Figure 1 ----------Claim (the first) as it appears on the announcement page: ------18/02/2019------(OCR) Page 1 of 1 Claim 1. A power conversion device comprising: a transistor for power conversion; a diode connected in series with the transistor; a smoothing capacitor connected in parallel with the transistor and the diode. and suppresses the oscillation current generated by the transistor; and the snubber circuit which has a snub capacitor part: