Inverter circuit

Details Inverter circuit Inverter circuit

1978-09-29

1979-09-11

Shoop, William M.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363131, 363132, H02M 118

Patent

active

041677765

ABSTRACT:
The invention relates to an inverter circuit which includes at least one pair of series connected transistors. The transistors of each pair are switched alternately on and off with a short dead period therebetween to prevent short circuiting. Rapid switching is accompanied by power being converted in each transistor on being switched off which is harmful to the transistor. Known auxiliary circuits disposed respectively parallel with the transistors include capacitors to slow the rise of the collector voltage relative to the drop in emitter current and this provides some protection against damage. Additional protection is attained by providing a choke coil in series with each pair of transistors which retards the charging of the capacitors and the transistor charging current is thereby kept low to prevent or minimize transistor damage.

REFERENCES:
patent: 3257604 (1966-06-01), Colclaser et al.
patent: 3652874 (1972-03-01), Partridge
patent: 3750003 (1973-07-01), Petersen et al.
patent: 3832573 (1974-08-01), Ver Planck et al.
patent: 3873282 (1975-03-01), Finch

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