Controller for a linear induction motor

Details Controller for a linear induction motor Controller for a linear induction motor

1991-09-18

1993-06-08

Stephan, Steven L.

Electricity: motive power systems

Linear-movement motors

318687, H02K 4100

Patent

active

052182770

ABSTRACT:
A controller for a linear induction motor primary includes sensors to measure motor operating parameters which allow the thrust developed by the linear induction motor to be determined. In one embodiment, a microprocessor receives the output of the sensors and determines the thrust developed by the linear induction motor. The microprocessor also performs operations to determine an updated supply voltage frequency which will cause the linear induction motor to develop thrust having a magnitude closer to the maximum thrust point of the linear induction motor at the given motor speed if the determined thrust is less than the maximum thrust. The microprocessor monitors the output of the sensors continuously so that the supply voltage frequency is updated continuously. This permits the linear induction motor to develop thrust near to or at its maximum thrust point regardless of changes in the ambient temperature or the linear induction motor secondary characteristics at any given speed.

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patent: 4965864 (1990-10-01), Roth et al.

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