Electrostatic precipitator voltage controller having improved el

Details Electrostatic precipitator voltage controller having improved el Electrostatic precipitator voltage controller having improved el

1987-02-26

1988-09-20

Salce, Patrick R.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

323903, 55 2, 55105, H02M 7155, B03C 368

Patent

active

047729988

ABSTRACT:
A control system for controlling high power from an AC source for electrostatic precipitators. The AC power is gated both on and off during the same half-cycle of the AC sources. The gating off of the AC power occurs at a time substantially different from the time of the zero crossings of the AC source. The AC source may be gated on and off respectively before and after each peak to provide high voltage to the precipator electrodes while the period of such pulsing is kept short enough to prevent arcing. Additionally, the source may be gated on after one peak and gated off before the next peak, thereby providing high voltage to the electrodes without applying the peak voltage of the AC. Further in accordance with the invention, such gating may be performed using gate turn-off thyristors. The pulses may be symmetric about the peaks or about the zero-crossings of the source. The source may also be gated on and off a plurality of times during each half cycle.

REFERENCES:
patent: 2961577 (1960-11-01), Thomas et al.
patent: 3039252 (1962-06-01), Guldemond et al.
patent: 3745749 (1973-07-01), Gelfand
patent: 3772853 (1973-11-01), Burge et al.
patent: 4138232 (1979-02-01), Winkler et al.
patent: 4152124 (1979-05-01), Davis
patent: 4326860 (1982-04-01), Laugesen
patent: 4390830 (1983-06-01), Laugesen
patent: 4522635 (1985-06-01), Matts
patent: 4648887 (1987-03-01), Noda et al.
Toshiba Gate Turnoff Thyristors-Product Literature, Toshiba Corporation, pp. 1-25.
"Gate Turn-Off Thyristors: Their Properties and Applications", W. Bosterling, AEG-Telefunken Corp. Preliminary Technical Information, Oct., 1983.
"Application of Gate, Turn-Off Thyristors in 460-V, 7.5-250-hp AC Motor Drives", IEEE Transactions on Industry Applications, vol. IA-19, No. 4, Jul./Aug., 1983.
"Applying International Rectifier's 160PFT Type Gate Turn-Off Thyristors", Akira Honda, International Rectifier Application, Note-315.

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