Apparatus and method for driving rotary machine

Details Apparatus and method for driving rotary machine Apparatus and method for driving rotary machine

2011-02-22

2011-02-22

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400010, C318S400060, C318S400110, C318S400130

Reexamination Certificate

active

07893638

ABSTRACT:
A motor driving apparatus has a loss-of-synchronism monitoring circuit that monitors the rotation of a rotary machine such as a brushless DC motor to detect a sign of transition to a state of loss of synchronism. When the sign is detected, an energization control circuit temporarily stops driving of the rotary machine to bring it into a free running state, and thereafter carries out control so as to resume driving of the rotary machine. Further, the motor driving apparatus has an inverter and a drive control circuit that controls switching operation of the inverter based on rotation of the rotary machine.

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