A method for controlling a permanent magnet (PM) synchronous motor in an ESP application is provided. A load angle of the PM motor is estimated. A voltage adjustment value is determined for the PM motor based at least on the estimated load angle of the PM motor. A voltage to be applied to the PM motor is determined based on the voltage adjustment value.

An apparatus is provided for controlling a vehicle air compressor to track water content in the compressor due to condensation during operation of the compressor. The apparatus includes a data storage unit for storing a condensation control algorithm and a processing unit for applying the condensation control algorithm to run the compressor in different modes of operation. A first mode of operation is when water content in the compressor is below a first water limit threshold, a second mode of operation is when water content in the compressor is between the first water limit threshold and a second water limit threshold, and a third mode of operation is when water content in the compressor is above the second water limit threshold.