Controlling method of synchronous motor

Abstract

Abstract PURPOSE:To increase the output torque by altering the phase of an instructed current in response to the saturation degree of a differential voltage between a current of each phase of an armature and a current to be flowed to each phase. CONSTITUTION:If a saturation signal Vr of a saturation detector 30 is 0V, the output of a multi-plug-in D/A converter 24 for multiplying the signal or ROM22 by the signal Vr becomes 0V, and outputs a correction phase current RTC' when the signal Vr is the maximum value. The phase current command RTC and a corrected phase current RTC' are added in a phase shifter 27, and outputs as a phase current command RT corrected from the shifter 27. In other words, the command RT corrected in response to the saturation degree becomes leading at 0 to 45 degrees as compared with the conventional phase current command.

Inventors

• 👤 Keiji Sakamoto
• 👤 坂本　啓二
• 👤 Toshio Kobayashi
• 👤 敏夫 小林

Bibliographic Details