Sensing load and/or speed changes in a switched reluctance motor

Details Sensing load and/or speed changes in a switched reluctance motor Sensing load and/or speed changes in a switched reluctance motor

1999-05-06

2000-10-24

Masih, Karen

Electricity: motive power systems

Switched reluctance motor commutation control

318138, 318439, 318798, 318811, 318802, 318803, 318808, 318810, H02K 2300

Patent

active

06137248&

ABSTRACT:
A method for detecting a change in motor load and/or motor speed is provided. The method includes the step of measuring the number of transitions (i.e., state changes) of a phase control signal in a motor phase of the motor. The method also includes the step of comparing the number of transitions to a predetermined number that is indicative of a predetermined motor load and/or motor speed. The predetermined number may comprise the number of transitions in a prior phase control signal of the motor. A method for controlling a motor responsive to a change in motor load and/or motor speed is also provided. The method includes the above-described steps for detecting a change in motor load and/or motor speed and further includes the step of selecting one of a plurality of operating modes for the motor responsive to a comparison value obtained by comparing the measured transition number with the predetermined transition number.

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