Motor control for brushless permanent magnet using only three wi

Details Motor control for brushless permanent magnet using only three wi Motor control for brushless permanent magnet using only three wi

1993-12-30

1996-01-02

Wysocki, Jonathan

Electricity: motive power systems

Switched reluctance motor commutation control

318439, H02P 700

Patent

active

054811660

ABSTRACT:
A method and system for controlling operation of a brushless permanent magnet motor having stator windings in star configuration in which back EMF fundamental and third harmonic components are induced, a rotor which rotates relative to the stator windings, and an inverter operatively coupled to the motor to drive same, wherein a star configuration of resistors is coupled to nodes of the inverter and third harmonic components of the flux density of the motor are obtained from across an artificial neutral node present in a network coupled to the stator phase nodes and either the stator neutral node or a direct current midpoint reference node positioned between the direct current nodes of an inverter used to drive the motor. The network preferably is a stator network of resistors each of which is coupled between one stator phase node and the artificial neutral node.

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Julio C. Moreira, et al., "Simple Efficiency Maximizer for an Adjustable Frequency Induction Motor Drive," IEEE Transactions on Industry Applications, vol. 27, No. 5, Sep./Oct., 1991.

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