Frequency-independent single-phase to three-phase AC power conve

Details Frequency-independent single-phase to three-phase AC power conve Frequency-independent single-phase to three-phase AC power conve

1989-05-10

1990-03-13

Wong, Peter S.

Electric power conversion systems

Cascaded or combined, diverse conversions in which the...

Current and phase

363 36, 363148, H02M 500

Patent

active

049087444

ABSTRACT:
Three-phase power-conversion wherein the frequency output voltage is independent of the frequency of input voltage. One of three input terminals in a load powered by the apparatus is directly grounded. Each of the other two input terminals is supplied a sinusoidal voltage artifact from an appropriate transform circuit which is driven by a microprocessor, with one of these artifacts having a form 1.73.alpha.SinA, and the other having the form of 1.73.alpha.Sin(A+60.degree.), where .alpha. is the nominal amplitude of the source voltage and the Expressions A and (A+60.degree.) are the respective phase angles. Operation of the microprocessor controls output frequency.

REFERENCES:
patent: 4618809 (1986-10-01), Maeda
patent: 4644241 (1987-02-01), Mazda
Dewan, "A Novel Static Single-to-Three-Phase Converter", IEEE Transactions on Magnetics, vol. MAG-17, No. 6, Nov. 1981, pp. 3287-3289.

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