Controller And Method For Transitioning Between Control Angles

摘要

A system includes a pulse-width modulation (PWM) module, a subtraction module, an error reducing module, and a summing module. The PWM module controls switching of an inverter that powers a motor. The PWM module controls the switching based on a first angle in a first mode and a second angle in a second mode. The subtraction module determines a difference between the first and second angles. The error reducing module (i) stores the difference when a transition from the first mode to the second mode is commanded and (ii) decreases a magnitude of the stored difference to zero. The summing module calculates a sum of the stored difference and the second angle. The PWM module controls the switching based on the sum in the second mode.

主权项

1. A control system for a motor, the control system comprising:
an angle determination module configured to generate an output rotor angle indicative of a desired angle of a rotor of the motor; a control module configured to control current supplied to the motor based on the output rotor angle; and an estimator module configured to determine an estimated rotor angle of the motor, wherein the angle determination module is further configured to:
upon startup of the motor, generate the output rotor angle based on a first rotor angle,upon beginning of a transition period, generate the output rotor angle based on (i) the first rotor angle and (ii) the estimated rotor angle, andupon ending of the transition period, generate the output rotor angle based on the estimated rotor angle.