Corrective device for inverter output voltage error

Details Corrective device for inverter output voltage error Corrective device for inverter output voltage error

1990-01-30

1990-11-06

Stephan, Steven L.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 56, 363 80, 363 98, 363132, H02M 112

Patent

active

049690795

ABSTRACT:
A corrective device for an inverter output voltage error in which a current sensor is connected in series with the output of an inverter, the polarity of current detected by the current sensor is discriminated by a polarity decision current, a value corresponding to an input D.C. voltage is found by a D.C. voltage sensor, a signal with the polarity of the value inverted according to the discriminated result delivered from the polarity decision current is generted by a polarity inverter circuit, and the signal is applied as a correction signal to the PWM (pulse-width modulation) circuit of the inverter so as to correct the output voltage error.

REFERENCES:
patent: 4133025 (1979-01-01), Wurzburg
patent: 4546422 (1985-10-01), Okado
patent: 4562386 (1985-12-01), Goff et al.
patent: 4600984 (1986-07-01), Cohen
patent: 4660137 (1987-04-01), Hotaka
patent: 4692855 (1987-09-01), Kuroiwa et al.
patent: 4729082 (1988-03-01), Sato
patent: 4729084 (1988-03-01), Kataoka
patent: 4791546 (1988-12-01), Carroll
patent: 4803611 (1989-02-01), Sashida et al.
Sekino et al, "Inverter Output Voltage Waveform Closed-Loop Control Technique", INTELEC 83, Oct., 1983.

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