Method and apparatus for controlling hybrid excitation type perm

Details Method and apparatus for controlling hybrid excitation type perm Method and apparatus for controlling hybrid excitation type perm

1996-05-13

1997-11-18

Wysocki, Jonathan

Electricity: motive power systems

Synchronous motor systems

Armature winding circuits

318812, H02P 500

Patent

active

056891660

ABSTRACT:
To extend an operable range of a hybrid excitation type permanent magnet synchronous motor having a field of a permanent magnet and a dc excitation coil, magnetic flux of the field is controlled so as to keep constant when a rotation speed of the motor is smaller than a predetermined base speed and so as to change in reverse proportion with the rotation speed of the motor when the rotation speed is larger than the predetermined base speed. Electric current and voltage to an armature of the motor is controlled such that a current ratio of a direct-axis component and a quadrature-axis component which components are obtained by dividing an electric current to the armature coil into the direct-axis component and the quadrature-axis component relative to the voltage induced in the armature coil, is kept constant.

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