Inverter radiation suppression
First Claim
1. In a transistor inverter including at least a pair of switching transistors, a transformer having primary and secondary windings, a DC voltage source having a pair of output terminals and a voltage reference terminal, and a rectifying circuit connected to the secondary winding of said transformer, said transistor inverter further comprising:
- (a) insulation means for mounting one of said switching transistors on a chassis which comprises at least a first insulating layer, a conductive layer and a second insulating layer interposed between a transistor case and said chassis;
(b) means for electrically connecting said conductive layer to the voltage reference terminal of said DC voltage source.
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Accused Products
Abstract
A transistor inverter includes at least a pair of switching transistors, a transformer with primary and secondary windings, a DC voltage source with a pair of output terminals and a voltage reference terminal, and a rectifying circuit connected to the secondary winding of the transformer. A collector electrode of one of the switching transistors is insulated from a chassis by an insulation means comprising a first insulating layer, a conductive layer such as a heat sink and a second insulating layer. The conductive layer is electrically connected to the voltage reference terminal of the DC voltage source so as not to produce an undesirable radiation through the chassis.
10 Citations
10 Claims
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1. In a transistor inverter including at least a pair of switching transistors, a transformer having primary and secondary windings, a DC voltage source having a pair of output terminals and a voltage reference terminal, and a rectifying circuit connected to the secondary winding of said transformer, said transistor inverter further comprising:
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(a) insulation means for mounting one of said switching transistors on a chassis which comprises at least a first insulating layer, a conductive layer and a second insulating layer interposed between a transistor case and said chassis; (b) means for electrically connecting said conductive layer to the voltage reference terminal of said DC voltage source. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A transistor inverter adopted for suppression of self-generated interference components comprising:
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(a) a DC voltage source having first and second output terminals and a voltage reference terminal; (b) an output transformer having primary and secondary windings, one end of said primary winding being connected to said reference terminal; (c) first and second switching transistors, each having a case connected to its collector, said first transistor having its collector connected to the first output terminal and its emitter connected to the other end of said primary winding of the output transformer, said second transistor having its collector connected to the first transistor emitter and its emitter to the second output terminal; (d) feedback means connected between bases of said switching transistors and said output transformer; (e) insulation means interposed between said second transistor and a chassis, said insulation means comprising a first insulating layer, a conductive layer and a second insulating layer; and (f) means for electrically connecting said conductive layer to the voltage reference terminal of said DC voltage source. - View Dependent Claims (8, 9, 10)
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Specification