Methods, systems and apparatus for adjusting current and/or torque commands used to control operation of an asynchronous machine

摘要

Embodiments of the present disclosure relate to methods, systems and apparatus for adjusting current and/or torque commands used to control operation of an asynchronous machine based on rotor flux of the asynchronous machine.

主权项

1. A method performed at a controller for controlling an asynchronous machine, the method comprising:
determining rotor flux feedback of the asynchronous machine; generating, using a value of rotor flux ratio that is a ratio of the rotor flux feedback to a rotor flux command:
a first control signal that dynamically adjusts a torque slew rate of a torque command by initially setting the torque slew rate to a slow torque slew rate value via the first control signal and, when the value of the rotor flux ratio is determined to be greater than or equal to the high threshold value, setting the torque slew rate to a faster torque slew rate value via the first control signal, anda second control signal that dynamically adjusts a current slew rate of final current commands independently of the torque slew rate such that the torque and current slew rates have different values; and processing the final current commands to generate current signals that control the asynchronous machine.