Technique for increasing power capability of a DC-to-AC converter

A power system, comprising:

• DC/AC converter;
• a processor coupled to the DC/AC converter;
• and
• a memory subsystem coupled to the processor, the memory subsystem storing code that when executed by the processor instructs the processor to perform the steps of:
• determining when an electrical load that is coupled to the DC/AC converter causes a link voltage of the DC/AC converter to fall below a first predetermined link voltage level;
• controlling a DC/AC output inverter of the DC/AC converter to cause the DC/AC converter to provide a non-sinusoidal output waveform when the link voltage falls below the first predetermined link voltage level;
• and
• controlling the DC/AC output inverter of the DC/AC converter to cause the DC/AC converter to provide a sinusoidal output waveform when the link voltage exceeds the first predetermined link voltage level or a second predetermined link voltage level.

A power system, comprising:

• DC/AC converter;
• a processor coupled to the DC/AC converter;
• and
• a memory subsystem coupled to the processor, the memory subsystem storing code that when executed by the processor instructs the processor to perform the steps of:
• determining when an electrical load that is coupled to the DC/AC converter causes a link voltage of the DC/AC converter to fall below a first predetermined link voltage level;
• controlling a DC/AC output inverter of the DC/AC converter to cause the DC/AC converter to provide a non-sinusoidal output waveform when the link voltage falls below the first predetermined link voltage level;
• and
• controlling the DC/AC output inverter of the DC/AC converter to cause the DC/AC converter to provide a sinusoidal output waveform when the link voltage exceeds the first predetermined link voltage level or a second predetermined link voltage level, wherein the predetermined link voltage level is a level at which the link voltage is not adequate to allow the DC/AC converter to provide a desired root-mean square (RMS) voltage with a sinusoidal output waveform, and wherein the non-sinusoidal waveform is one of a square waveform and a sawtooth-like waveform.