| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress a vibration of a compressor and to obtain a desired torque in a wide speed range. <P>SOLUTION: During a period in which sensorless vector control is being made to conform a motor output torque to a load torque, when a motor current exceeds a current threshold value determined by the characteristics of elements constituting an inverter 3, an MPU 8 increases the rotating speed of the motor until the motor current becomes the current threshold value or below. <P>COPYRIGHT: (C)2010,JPO&INPIT |
