Multiple-Carrier Pulse Width Modulation for Inverter Operation

A method for generating pulse width modulated control signal has the steps of providing a base carrier waveform, segmenting the base carrier waveform into a plurality of carrier waveforms, and providing at least one modulating signal. The first and second waveforms are compared to the at least one modulating signal to produce first and second comparator outputs, which are then mathematically combined to produce a pulse width modulated control signal.

The technology is a process that can be applied to dc-ac power converters (i.e., inverters) that use pulse width modulation (PWM), to provide two features:

  1. It allows inverters to use a high-frequency ac link bus instead of the conventional dc; and,
  2. It allows multiple signals to be put onto the same PWM carrier or data stream for delivery to multiple switches.

To license the entire Solar Panels portfolio, click here.