Electric Motor Current Controller with Negative Sequence Harmonic Suppression

摘要

A current controller is provided having a positive sequence controller and a negative sequence controller, where error signals operated on by the positive sequence controller are transformed into a negative sequence reference frame and input to the negative sequence controller. A current controller is also provided having a positive sequence controller, a negative sequence controller, and one or more delay state feedbacks to counter control loop delays, where the delay state feedbacks provide high bandwidth, low current overshoot, small current rise time and good current stability margins. A current controller is also disclosed having a positive sequence controller, a negative sequence controller, and one or more cross coupled gains between a d-axis and a q-axis, where the cross coupled gains are proportional to the speed of a motor associated with the current controller.

主权项

1. A current controller comprising:
a positive sequence controller; and at least one negative sequence controller, where error signals operated on by said positive sequence controller are transformed into at least one sequence reference frame and input to said at least one negative sequence controller with at least one targeted harmonic set by a harmonic factor value.