Power conversion system with instantaneous real power feedback c

Details Power conversion system with instantaneous real power feedback c Power conversion system with instantaneous real power feedback c

1990-07-27

1992-08-04

Stephan, Steven L.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

363 37, 363 98, H02M 540

Patent

active

051364948

ABSTRACT:
A voltage PWM converter/inverter system comprises a converter for converting an alternating current power input into a direct current power output and inverting the direct current power output of the converter into an alternating current power output. A smoothing circuit is inserted between the converter and the inverter and an instantaneous real power calculating unit calculates an instantaneous real power for the inverter to provide an output comprising an instantaneous real power calculated value. The system includes a converter controller for voltage PWM control of the converter based on a set converter command value, a terminal direct current voltage value of the smoothing capacitor, and the instantaneous real power calculated value. The system further includes an inverter controller for voltage PWM control of the inverter based upon a set inverter command value and the alternating current power provided as a an output by the inverter.

REFERENCES:
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patent: 4555750 (1985-11-01), Matsumura et al.
patent: 4620296 (1986-10-01), Siemon
patent: 4862340 (1989-08-01), Inokuchi
patent: 4941079 (1990-07-01), Ooi
H. Tozuka, et al., "Voltage PWM Converter-Inverter System with Instantaneous Power Feedback", Electric Association Semiconductor Power Converter Research Institute, SPC-90-14, pp. 29-35, Jan. 1990.
Takumi Maruoka, "Application of Inverter Power Supplies to Industrial Machines", Energy Conservation and Automation, pp. 25-29, Dec. 1987.
H. Tozuka, et al., "DC Voltage Control Method for Power Rectifiers Using a Voltage PWM Converter", Jul. 1989 Electric Association National Conference (Report), p. 5.42.
K. Sakai, et al., "Study of All-Digital Voltage Converter", Feb. 1990 Electric Association National Conference (Report), pp. 5.27-5.28.
Tsukamoto, et al., "DC Voltage Control Method for a Power Rectifier Using Voltage PWM Converter", Jul. 1987 Electric Association National Conference (Report), pp. 590-591.
T. Okuyama et al., "High Performance AC Motor Speed Control System Using GTO Converters", Proceedings of IPEC, Tokyo '83, Institute of Electrical Engineers, pp. 720-731, Apr., 1983.

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