PWM Inverter circuit
AssigneeSundstrand Corporation
InventorTimothy F. Glennon
Life of this patent
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Abstract
This invention relates to a pulse width modulated inverter circuit having an output signal with reduced harmonic content. The inverter circuit includes a first circuit that provides a filtered fundamental pulse width modulated signal. A second circuit is electrically coupled to the first circuit to receive the signal and sum therewith a controlled signal and the filtered fundamental pulse width modulated signal. The second circuit thereby providing the output signal with reduced harmonic content.
Claims19
A PWM inverter circuit having an output signal with reduced harmonic content, said circuit including:
- first means to provide a filtered fundamental PWM signal,
- second means electrically coupled to said first means to receive said signal and sum therewith a controlled signal that is the function of the sum of a desired waveform signal and said filtered fundamental PWM signal, said second means providing said output signal with reduced harmonic content.
A pulse width modulated inverter circuit having an output signal with reduced harmonic content, said inverter circuit including in combination:
- a pulse width modulated inverter electrically coupled to a filter to provide a filtered fundamental pulse width modulated signal simultaneously to a controlled harmonic reduction pulse width modulated inverter means and to a main summing means,
- said controlled harmonic reduction pulse width modulated inverter means providing a signal to said main summing means which signal is a function of the sum of a desired waveform signal and said filtered fundamental pulse width modulated signal,
- said main summing means electrically coupled to and through a filter means to provide said output signal with reduced harmonic content.
Dependencies are inferred from the claim text.