| 摘要 |
PROBLEM TO BE SOLVED: To shorten a time for mounting an encoder, and to improve mounting accuracy by accurately estimating the deviation of a magnetic pole position existing when the encoder is mounted to a synchronous motor. SOLUTION: In this error adjustment method based on the initial magnetic pole position estimation value of a synchronous motor with a means for calculating the initial magnetic pole position of a rotor, a command torque current is set to zero in a bi-phase command current, a command flux current is set to an arbitrary limited repetition waveform (45 to 48), angular acceleration is calculated according to detection speed (51), generation torque is estimated by a motor movement equation according to the information on the command flux current, detection speed, angular acceleration, inertia of the motor, viscosity friction, and friction torque, the estimated torque is divided by the constant of torque for estimating a torque current, the command flux current and the estimated torque current are used for estimating a flux current, the estimated flux current and the estimated torque current are used for estimating the initial magnetic pole position (54), and the result is displayed (56). |
