Systems and Methods for Controlling a Converter for Powering a Load

A system for providing power to a load, comprising:

• a voltage source operable to supply a power signal;
• a power converter;
• and
• at least one gating controller operable to supply at least one gating control signal comprising a switching pattern to the power converter, wherein the switching pattern comprises a waveform comprising an effective switching frequency greater than 1 times the fundamental frequency of the switching pattern and less than 2 times the fundamental frequency of the switching pattern;
• wherein the converter is operable to receive the power signal from the voltage source and output at least one output power signal to the load responsive at least in part to the at least one gating control signal supplied.

A method for powering a load, comprising:

• providing a three-phase wye-connected H-bridge power converter, wherein each phase of the H-bridge power converter comprises two legs;
• supplying an input power signal to the H-bridge power converter;
• supplying a different gating control signal comprising a switching pattern to each leg of each phase of the H-bridge power converters wherein each switching pattern comprises a waveform comprising at least a first notch positioned to occur at a substantially positive slope of a reference voltage of the respective gating control signal and a second notch positioned to occur at a substantially negative slope of the reference voltage, the waveform comprising an effective switching frequency greater than 1 times the fundamental frequency of the switching pattern and less than 2 times the fundamental frequency of the switching pattern, wherein the degrees of separation between each notch determines the effective switching frequency;
• and
• outputting at least one output power signal to the load responsive at least in part to the gating control signals supplied.