Apparatus and method for detecting rotor position in a sensorles

Details Apparatus and method for detecting rotor position in a sensorles Apparatus and method for detecting rotor position in a sensorles

1992-08-12

1994-07-05

Wysocki, Jonathan

Electricity: motive power systems

Switched reluctance motor commutation control

318439, H02D 700

Patent

active

053270533

ABSTRACT:
An apparatus and process for detecting rotor position for improved motor start-up. The apparatus detects a target equilibrium position of the rotor using a fixed gain amplifier, window comparator and slope detector circuitry. The window comparator circuitry qualifies the peaks of the back EMF signal. Slope detector circuitry pinpoints the peak of the back EMF signal qualified by the window comparator. The technique utilizes the steps of energizing the phase windings of said motor, detecting the target equilibrium position, and then accelerating the motor through a commutation process.

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