Novel Sinusoidal Pulse Width Modulation with Least Correlated Noise

This paper presents a novel sinusoidal modulation scheme that features least correlated noise and high linearity. The modulation circuit, which is composed of a quantizer, a resonator, and a comparator, is capable of eliminating correlated modulation noise while doing modulation. The proposed modulation scheme combined with the linear quadratic optimal control is applied to a single-phase voltage source inverter and validated with the experiment results. The experiments show that the inverter supplies stable 60Hz 110V AC power with a total harmonic distortion of less than 1%, under the DC input variation from 190 V to 300 V and the output power variation from 0 to 600 W.

Authors:

• Shiang-Hwua Yu
• Han-Sheng Tseng

Keywords:

• Pulse width modulation
• feedback dithering
• linear quadratic control
• inverter.

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