Method and apparatus for sensing the rotor position of a switche

Details Method and apparatus for sensing the rotor position of a switche Method and apparatus for sensing the rotor position of a switche

1994-03-01

1995-04-25

Wysocki, Jonathan

Electricity: motive power systems

Synchronous motor systems

Hysteresis or reluctance motor systems

318254, 318608, G05B 1100

Patent

active

054102359

ABSTRACT:
Apparatus and method for detecting rotor (12) position in a switched reluctance motor (18) having multiple stator phases (A-A', B-B', and C-C'). A multiplexer (48) intermittently connects a known resistor (54) to a non-conducting stator phase. Circuitry (62 and 68) detects the amplitude of the current passing through the resistor (54) and the phase difference between the varying voltage and the current passing through resistor (54). The resulting signal is proportional to the position of rotor (12).

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S. R. MacMinn et al., "Application of the Sensor Integration Techniques to the Switched Reluctance Motor Drive", IEEE Industry Applications Conference Record 1988, pp. 584-588.
J. T. Bass, et al., "Robust Torque Control of Switched Reluctance Motors Without a Shaft Position Sensor", IEEE Transactions on Industrial Electronics, vol. IE-33, No. 3, pp. 212-216, Aug. 1986.
J. T. Bass, et al., "Simplified Electronics for Torque Control of Sensorless Switched Reluctance Motor", IEEE Transactions on Industrial Electronics, vol. IE-34, No. 2, pp. 234-239, May 1987.

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