Control apparatus for PWM inverter

Details Control apparatus for PWM inverter Control apparatus for PWM inverter

1984-10-25

1985-12-31

Leung, Philip H.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 97, 307265, H02M 7217

Patent

active

045625247

ABSTRACT:
A control apparatus for producing a pulse width modulating signal to be used for operation of a PWM inverter wherein a modulating wave of a sinusoidal waveform corresponding to the desired AC output voltage of the inverter is sampled at selected periodical time intervals to obtain a level of the modulating wave at each sampling point and the interval is arithmetically determined between each sampling time point and a time point which appears between the sampling point and the next sampling point and at which time point a virtual triangular waveform, which has positive and negative peaks of a predetermined amplitude occurring alternately at the selected periodical time interval, takes the same level as the sampled level of the modulating wave. On the basis of the time interval, the PWM signal is produced.

REFERENCES:
patent: 4099109 (1978-07-01), Abbondanti
patent: 4486824 (1984-12-01), Okuyama et al.
patent: 4494178 (1985-01-01), Ishima
patent: 4513362 (1985-04-01), Aizawa
Wilson et al., Intrinsic Harmonics of Idealized Inverter PWM Systems, IEEE Industry Application Society, 1976 (35-E) pp. 967-973.

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