Control system for permanent magnet synchronous motor

Details Control system for permanent magnet synchronous motor Control system for permanent magnet synchronous motor

1996-09-10

1998-12-29

Martin, David S.

Electricity: motive power systems

Synchronous motor systems

Field winding circuits

318432, 318434, 318712, 318802, 318811, H02P 706

Patent

active

058545476

ABSTRACT:
To provide a control system for a permanent magnet synchronous motor which can ensure stability of the current control system, even if the revolution frequency of the motor becomes higher and the terminal voltage of the motor exceeds the inverter maximum output voltage. In this method, when the revolution frequency of the motor exceeds a specified value, the size of the voltage vector is made a specified voltage vector, and a modulation factor based on its value is obtained. At the same time, a magnetic flux direction current correction value is found based on the size of a voltage vector from a polarity coordinates conversion unit and the above specified voltage vector size. Then, the magnetic flux direction current instruction is corrected by that value.

REFERENCES:
patent: 5144564 (1992-09-01), Naidu et al.
patent: 5504404 (1996-04-01), Tamaki et al.
patent: 5652495 (1997-07-01), Narazaki et al.
patent: 5656911 (1997-08-01), Nakayama et al.

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