| 摘要 |
PROBLEM TO BE SOLVED: To suppress load torque and a rotational speed during one rotation, and to expand an operating range in a low-revolution region in an electric motor. SOLUTION: This electric motor controlling method is provided for suppressing the change of load torque during one rotation of a compressor and the like. By obtaining in advance a compensating voltage pattern (addition data) matching the change of load torque for each of given rotating angles of the electric motor, by storing it in an internal memory of a controlling means (a microcomputer), and by treating a value obtained by adding the addition data read out from the internal memory for each given rotating angle to a reference voltage as an impressed voltage to the electric motor, the output torque of the electric motor is changed to suppress the change of the rotational speed during one rotation. |
