| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller for compressor driving motor, which can reduce noise by preventing the fluctuation of the rotational speed of a rotor due to pulsation of load torque, when driving a compressor by a permanent magnet synchronous motor, and a control method for the compressor driving motor. <P>SOLUTION: In this controller, the relation between the position of the rotor of the permanent magnet synchronous motor 4 and the position of the tooth of a screw type compressor, which becomes a load, is fixed uniquely, and the positional information of the rotor and the phase information of torque ripple are determined uniquely in advance, and a speed controller 1 generates a torque command to control the permanent magnet synchronous motor, and a torque superposition amount computer 7 superposes the ripple amount of load torque peculiar to a compressor on the torque command, and it controls the permanent magnet synchronous motor 4 by a torque command whereon the ripple amount of load torque is superposed. <P>COPYRIGHT: (C)2009,JPO&INPIT |
