An AC motor control circuit particularly suitable for motors having permanent magnet rotors, and stators which are supplied with AC current from an inverter. A current detection (33) detects the DC current input to the inverter (29) and produces an output signal which is supplied to a power factor calculation circuit (36). The output from this circuit is supplied to a voltage and frequency calculation circuit (38) whose output is in turn supplied to a drive circuit (38) which produces pulse-width-modulated drive signals for the transistors of the inverter (29). <IMAGE>
申请公布号
DE69031573(D1)
申请公布日期
1997.11.13
申请号
DE1990631573
申请日期
1990.11.09
申请人
KABUSHIKI KAISHA TOSHIBA, KAWASAKI, KANAGAWA, JP
发明人
NAKAMURA, YOSHINOBU, C/O INTELL.PTY. DIV., TOKYO, JP;MOCHIKAWA, HIROSHI, C/O INTELL.PTY.DIV., MINATO-KU, TOKYO, JP