HIGH PERFORMANCE CURRENT SENSING ARCHITECTURE FOR BRUSHLESS MOTORS
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United States of America Patent
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Issued Date -
May 14, 2020
app pub date -
Nov 8, 2019
filing date -
Nov 9, 2018
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Abstract
A motor controller for controlling the operation of a three-phase permanent magnet synchronous electric motor, wherein the three-phase permanent magnet synchronous electric motor is characterized by three phases A, B, C, and further wherein the three-phase permanent magnet synchronous electric motor is driven by regulating three phase currents iA, iB and iC for the three phases A, B, C, respectively, the motor controller comprising: a three-phase power supply for supplying the three phase currents iA, iB and IC a first sensor for sensing the phase current iA; a second sensor for sensing across the phase currents iB and iC; and a microcontroller for controlling the operation of the three-phase power supply so as to produce the three phase currents iA, iB and iC needed to operate the three-phase permanent magnet synchronous electric motor, wherein the microcontroller reads the outputs of the first sensor and the second sensor and adjusts operation of the three-phase power supply so as to produce phase currents iA, iB and iC which produce the desired torque in the three-phase permanent magnet synchronous electric motor.
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