Patent Number: 6,683,428

Title: Method for controlling torque in a rotational sensorless induction motor control system with speed and rotor flux estimation

Abstract: A multi-phase induction motor torque control method comprising the steps of establishing an adaptive speed observer and an adaptive flux observer using a speed sensorless control scheme. Rotor speed is estimated based on filtered current and voltage command signals as inputs. A flux observer based on the estimated rotor speed and rotor flux angle is calculated using the estimated rotor flux. Torque is determined following estimation of speed and flux.

Inventors: Pavlov; Alexei (Eindhoven, NL), Zaremba; Alexander T (Dearborn Heights, MI)

Assignee: Ford Global Technologies, LLC

International Classification: H02P 21/14 (20060101); H02P 007/00 ()

Expiration Date: 01/27/2021