Digital state feedback control of a three phase sinusoidal PWM inverter

Conference · Fri Dec 30 23:00:00 EST 1994

OSTI ID:68519

Matin, Md A ^[1]; Divsalar, D ^[2]

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1. West Coast Univ., Los Angeles, CA (United States)
2. Jet Propulsion Lab., Pasadena, CA (United States)

This paper proposes a method of three phase voltage control sinusoidal PWM (Pulse Width Modulation) inverter. The state equation of the inverter main circuit has been derived and transformed to the d-q frame. Afterwards, an algorithm of dead-beat control has been developed by considering only the load current as disturbing variable. The advantage of dead-beat control is that it can control very fast within short time (sampling period) comparing to other methods. The main objective of the controller design is to get the sinusoidal voltage at inverter`s output with low harmonic distortions. To compensate the calculation delay and to realize physically, a 3d order prediction method has been adopted. A new switching technique has been developed. This switching technique can reduce unnecessary switching so that switching loss can be minimized. Finally, simulations has been done under a typical load condition (rectifier with capacitor load) and harmonic analysis has also been done. Throughout all simulations, very good results have been found where total harmonic distortions (THD) is less than 5%.

• OSTI ID: 68519
• Report Number(s): CONF-941216--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CONTROL
CONTROL SYSTEMS
DESIGN
INVERTERS
MATHEMATICAL MODELS
POWER SUPPLIES