Apparatus for feeding alternate polarity pulses to a load

Details Apparatus for feeding alternate polarity pulses to a load Apparatus for feeding alternate polarity pulses to a load

1983-06-10

1986-02-25

Wong, Peter S.

Electricity: power supply or regulation systems

External or operator controlled

Phase controlled switching using electronic tube or a three...

323324, 320 1, 307110, 307127, H02M 3315

Patent

active

045730067

ABSTRACT:
Alternate polarity pulses of current are fed to a load L1A by charging a capacitor C5A alternately in different directions and closing unidirectional switches V2A and V3A at appropriate times to discharge the capacitor C5A through the inductor L1A. This arrangement is considered superior to an alternative system in which different capacitors are charged with different polarities to produce the different pulses. In the latter system the arrangement of switches needs to be such that the closing of one produces transient voltages which might cause the other switch to operate when it is not required to do so. In the illustrated system the switches V2A and V3A, being connected in parallel, do not suffer from this problem. In an alternative system the switches V2A and V3A could be replaced by a single bi-directional switch.

REFERENCES:
patent: 3371232 (1968-02-01), Hannan et al.
patent: 3611111 (1971-10-01), Johnston
patent: 3731179 (1973-05-01), Rademaker
patent: 4039927 (1977-08-01), Richards, Jr. et al.
patent: 4107757 (1978-08-01), Masuda et al.
patent: 4338656 (1982-07-01), Yamakido

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