Controller for motor

Details Controller for motor Controller for motor

2007-03-07

2009-02-03

Ip, Paul (Department: 2837)

Electricity: motive power systems

Armature circuit control

C318S434000, C318S721000, C318S723000, C318S727000

Reexamination Certificate

active

07486043

ABSTRACT:
A controller for a motor performs field weakening control by changing a phase difference between two rotors, which are concentrically disposed, and by accurately recognizing the phase difference. The controller for a motor includes an actuator and a planetary gear mechanism that change a rotor phase difference on the basis of a command value of a phase difference (rotor phase difference) between an outer rotor and an inner rotor of a motor in field weakening control, a constant calculator which calculates an induced voltage constant of the motor and an inductance of a q-axis armature on the basis of a d-axis current detection value, a q-axis current detection value, d-axis voltage command value, a q-axis voltage command value, and an angular velocity of the motor, a rotor phase difference estimator which determines an estimated value of the rotor phase difference on the basis of the induced voltage constant and the q-axis inductance, and a current command value determiner which determines a command value of d-axis current and a command value of q-axis current by using the estimated value.

REFERENCES:
patent: 6396229 (2002-05-01), Sakamoto et al.
patent: 7342378 (2008-03-01), Sakamoto et al.
patent: 2002-204541 (2002-07-01), None

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