Pulse width modulation type contravariant device

Application Number: 00118986
Application Date: 2000.07.05
Publication Number: 1291822
Publication Date: 2001.04.18
Priority Information: 1999/7/5 JP 190674/99
International: H02M3/28;H02M3/335
Applicant(s) Name: TDK Corp.
Address:
Inventor(s) Name: Ito Ichiyuki;Okita Yoshihisa;Tanaka Katsuaki
Patent Agency Code: 11105
Patent Agent: ma ying
Abstract This PWM inverter apparatus includes a first and second current control type semiconductor switching elements connected in series which are connected in parallel to a DC power supply. An output is generated by alternately switching the first and second semiconductor switching elements. Resistive semiconductor switching elements having a higher switching speed than the first and second semiconductor switching elements and a resistance-to-current characteristics producing a voltage drop are respectively connected in parallel to respective the first and second semiconductor switching elements. In the half cycle of the alternating output current, the switching timing is controlled to generate the output by the switching operation only of the resistive semiconductor switching elements.