Operating point determination in an electric motor system
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United States of America Patent
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Apr 14, 2020
Grant Date -
Nov 2, 2017
app pub date -
Jun 22, 2016
filing date -
May 2, 2016
priority date (Note) -
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Abstract
Systems and methods are described for controlling an electric motor. An exemplary system may include a torque detector configured to detect an output torque of the electric motor. The system may also include a controller configured to control a voltage source to apply a predetermined voltage to drive the electric motor and determine an operating table containing a plurality of operating points. The controller may select an operating current value and generate a plurality of current commands. The controller may also apply each of the plurality of current commands to drive the electric motor and determine an output torque generated by the electric motor. The controller may further determine a target current command that generates a maximum output torque. In addition, the controller may determine an operating point of the operating table based on the target current command. Moreover, the controller may control the electric motor using the operating table.
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