| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a control unit for a current sensorless motor capable of favorably controlling a motor without a current sensor as well as attaining cost reduction. <P>SOLUTION: This control unit for current sensorless motor determines a transfer function which indicates the relation between a motor angular velocity w and a voltage command va* without including current components based on a mechanical equation of state including a mechanical constant for a motor 2 and a load 10, and the motor angular velocity w, as well as an electrical equation of state including an electrical constant for the motor 2 and the motor angular velocity w, thereafter finding the voltage command va* obtained by regarding the motor angular velocity w* as an input signal using a transfer function arithmetic expression including the transfer function, the motor angular velocity w, and the voltage command, in order to output the voltage command va* to a voltage supply unit 3. This eliminates a current sensor and estimated current in controlling the motor, thereby attaining cost reduction for the device. <P>COPYRIGHT: (C)2007,JPO&INPIT |
