Current control for microprocessor motor drive

Details Current control for microprocessor motor drive Current control for microprocessor motor drive

H - Electricity

02

P

318/98

H02P 23/00 (2006.01)

Patent

CA 1302483

Current Control for Microprocessor Motor Drive Abstract A motor control for controlling current in an induction motor. A microcomputer generates three inputs to control an inverter circuit that energizes the three phase windings of the motor. A speed control modulates the three inputs to adjust motor speed and voltage. current sensing circuit also modulates the three inputs to reduce motor current using a technique that over rides the speed control. By monitoring the current sensing circuit the microcomputer adjusts the speed control to force motor current to a level near a set threshold value.

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