Hybrid excitation type permanent magnet synchronous motor

Details Hybrid excitation type permanent magnet synchronous motor Hybrid excitation type permanent magnet synchronous motor

1995-05-23

1997-10-28

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310156, 310269, H02K 1912, H02K 1910

Patent

active

056820739

ABSTRACT:
A hybrid excitation type permanent magnet synchronous motor is provided with an armature and a rotor core arranged to be rotated relative to the armature. Permanent magnets are installed on the rotor core and generate magnetic flux which passes through the armature through a gap between the rotor and armature. Salient pole portions are integral with the rotor core and are not covered with the permanent magnets. The salient pole portions are arranged opposite to the armature through a gap such that the magnetic flux generated by the permanent magnets is effected by the magnetic flux passing through the salient pole portions. A direct current excitation coil generates the magnetic flux passing through the salient pole portions. Therefore, an operable speed area of the motor is increased without using demagnetization control and without degrading the efficiency.

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Nasar, S.A. and Unnewehr, L. E. Electromechanics and Electric Machines 1983 (month unknown) p. 276.

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