H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/60
H02M 7/537 (2006.01) H02H 7/122 (2006.01) H02M 1/06 (2006.01) H02M 7/48 (2006.01)
Patent
CA 1213321
Abstract A new and improved method and apparatus is dis- closed for inverting DC electrical power into AC elec- trical power by using a transistor inverter. A first transistor switching device is operatively coupled to an inductive load and to one potential from the DC power source. A first diode is operatively connected across and oppositely poled from the first transistor switching device. A second transistor switching circuit is opera- tively coupled to the inductive load and to the other potential of the DC power source. A second diode is operatively connected across and oppositely poled from the second transistor switching device. A capacitor is operatively coupled to the load and the other potential of the DC power source. The first transistor switching device is rendered conductive to couple the inductive load to the one potential of the DC source through the first transistor switching device while the second tran- sistor switching device is rendered non-conductive with a reverse bias potential. The first transistor switch- ing device is then rendered non-conductive with a re- verse bias potential and the load remains energized by the capacitor while the first transistor switching de- vice is turning off when a low voltage is across it. The second transistor switching device is then rendered conductive after the voltage across the second transis- tor reaches a predermined value while the first transis- tor switching device is maintained non-conductive with a reverse bias potential. The load is coupled to the other potential of the DC power source through the sec- ond transistor switching device. The second transistor switching device is subsequently rendered non-conductive with a reverse bias potential and the load remains ener- gized by the capacitor while the second transistor switch- ing device is turning of f when a low voltage is across it . - -
440150
Corporation Eaton
Macrae & Co.
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