Vector controller for a permanent magnet motor and inverter...

Details Vector controller for a permanent magnet motor and inverter... Vector controller for a permanent magnet motor and inverter...

2007-06-28

2010-10-26

Benson, Walter (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S801000, C318S767000

Reexamination Certificate

active

07821223

ABSTRACT:
In a system in which current is detected in an inexpensive manner or in a system in which a position detector is omitted, the present invention provides a high-efficiency vector controller for a permanent magnet motor that can minimize current at the same torque even when there is setting error (R−R*) in resistance. Even when a current value commanded for the d-axis is set to zero, a virtual inductance value calculated from a detected q-axis current value is used for output voltage value calculation and phase error estimation calculation; so even if there is setting error (R−R*) in resistance, current can be minimized at the same torque and thereby the present invention can provide a high-efficiency vector controller for a permanent magnet motor.

REFERENCES:
patent: 6396236 (2002-05-01), Luukko
patent: 6462492 (2002-10-01), Sakamoto et al.
patent: 6492788 (2002-12-01), Agirman et al.
patent: 2001/0026140 (2001-10-01), Ishida
patent: 2008/0191656 (2008-08-01), Satake et al.
“Position and Speed Sensorless Control for PMSM Drive Using Direct Position Error Estimation”, Sakamoto et al, IECOn'01: The 27th Annual Conference of the IEEE Industrial Electronics Society, pp. 1680-1685, vol. 3, Nov. 29-Dec. 2, 2001.
S. Morimoto, et al., “Wide Speed Control of Interior Permanent Magnet Synchronous Motor” Journal of the Institute of Electrical Engineers of Japan, vol. 114-D, No. 6, '94 p. 668.

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