| 摘要 |
<p>A vector control invertor has a device for sensing the speed of motor rotation from a rotation speed sensor mounted on a motor, a current sensor for sensing a primary current of the motor driven by an invertor circuit, a vector controller for operating an excitation voltage and torque voltage for independently controlling split currents for excitation and torque based on the sensed rotation speed of the motor, and a PWM circuit for outputting a voltage. This vector control invertor comprises at least one of the combination of an output torque estimator for estimating the motor output torque from the excitation current and torque current with a pulse oscillator for outputting an estimated torque value as a pulse train signal which enables the discrimination of positive and negative values and the combination of a pulse train input device for receiving a pulse train signal input from outside as positive and negative values with a torque command convertor for converting the received pulse train signal into a motor torque command.</p> |
