Methods, systems and apparatus for generating voltage commands used to control operation of a permanent magnet machine

A control system for generating voltage command signals for controlling a permanent magnet machine during a transition from an initial operating condition to a final operating condition, the control system comprising:

• a processor configured to execute software instructions;
• and
• a memory configured to store software instructions accessible by the processor, wherein the software instructions comprise:
• a voltage command generator module configured to generate ramped voltage command signals, based on an electrical angular frequency of the permanent magnet machine, and synchronous reference frame current signals, wherein the ramped voltage command signals each change linearly in accordance with a slope during a transition period that is set to a rise time, wherein the ramped voltage command signals are generated based on the rise time, offset values, and slopes that define trajectories of the ramped voltage command signals, wherein the ramped voltage command signals change from initial values at the initial operating condition by the offset values, then change linearly in accordance with the slopes during the transition period, and after the transition period, change by the offset values to final values at the final operating condition.