SENSORLESS FIELD-ORIENTED CONTROL (FOC) WITHOUT CURRENT SAMPLING FOR MOTORS

摘要

An apparatus includes a sensorless field-oriented control (FOC) motor controller (108). The motor controller includes a pulse width modulation (PWM) controller (224) configured to generate PWM signals and to provide the PWM signals to an inverter (104). The motor controller also includes an angle sampler configured to receive a commanded voltage angle signal θ and to provide the commanded voltage angle signal as an output signal in response to a triggering event. The triggering event is based on a voltage or a current associated with an input or an output of the inverter. The motor controller further includes a first combiner (220) configured to combine (i) a feed-forward voltage angle signal and (ii) a second signal based on the output signal. The first combiner is configured to generate the commanded voltage angle signal θ. In addition, the motor controller includes a second combiner (222) configured to combine a feed-forward voltage amplitude signal and the second signal.