| 摘要 |
PURPOSE:To smoothly travel even at an extremely low speed time by correcting an AC command signal in response to the output signal of pulsation-detecting means. CONSTITUTION:Coefficient generators 45, 47 output coefficients gamma and lambda in response to the rotating speed of an induction motor 5. A function generator 33 outputs a correction coefficient mu in response to the vibration in a battery voltage. A multiplier 51 multiplies a correction signal produced by multiplying the coefficient mu by the coefficient gamma by a coefficient A' in response to a torque signal A from an accelerator 13, and outputs a voltage command signal V. A multiplier 53 multiplies a coefficient A'' in response to a torque signal A by the coefficient lambda, and outputs a frequency command signal ws. A 3-phase sinusoidal wave generator 21 outputs a 3-phase sinusoidal wave signal in response to the signal V, a frequency command signal ws and the speed signal. Comparators 25, 27, 29 compare the 3-phase sinusoidal wave signals with a triangular wave signal, and supplies a pulse-width-modulated 3-phase signals to an inverter 3. |
