Motor control device

Details Motor control device Motor control device

2007-01-30

2007-01-30

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Field winding circuits

C318S700000, C318S708000, C318S713000, C318S714000, C318S715000, C318S132000, C318S434000

Reexamination Certificate

active

11167254

ABSTRACT:
In the control of a synchronous motor having a permanent magnet, an alternating current power supply voltage that is input to a power amplifier or a direct current link voltage of which input voltage is rectified is measured. A reactive current (a d-axis current) or a current control phase advance is changed, according to this power supply voltage. With this arrangement, reactive current control or current phase control can be carried out directly according to a change in the input power supply voltage. A motor control device includes a voltage measuring unit that measures a voltage supplied to a driving amplifier, and a current control unit that controls a current passed to a synchronous motor based on the measured voltage. The voltage measuring unit measures a voltage supplied to the amplifier. The current control unit controls a current that is passed to the synchronous motor, according to the measured voltage. As a result, the motor control device can directly control the current according to a change in the input power supply voltage to the motor.

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patent: 2003-52199 (2003-02-01), None
patent: 2006-20397 (2006-01-01), None

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