SU1458955A1 - Bridge inverter - Google Patents

Abstract

The invention relates to electrical engineering and can be used in systems of secondary power supply, electric drive and automation. The goal is to increase the speed of the reverse direction of the current in the inductive load circuit. The bridge inverter contains four main transistors 1–4, shunted by main diodes 5–8, and capacitor 9, connected in series to load circuit 15. Condenser 9 is connected in two oppositely connected circuits, each of which consists of a series-connected additional transistor 11, 13 and an additional diode 12, 14. All transistors are switched over the output signals of control unit 24. In one program, the main transistors 1, 2 and auxiliary transistor 11 are open, and in the other - transistors 3, 4 and 13. The voltage across the load is at the beginning of each. This half period has a half-sinusoidal pulse with a duration that constitutes an insignificant part of the half-period. During the action of this pulse, the load current changes its direction despite the inductive nature of the load. 2 Il. § (L

Description

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Claims (1)

Claim A bridge inverter containing four main transistors, each of which is shunted by an on-board main diode, a capacitor j connected in series to the inverter output circuit, and a control unit, characterized in that, in order to increase the reverse speed of the current direction in the inductive load circuit, the capacitor is shunted by two introduced circuits consisting of in series-connected additional transistor and additional diode and connected counter-parallel to each other, moreover control circuits of additional transistors are connected to the outputs of the control unit, which is designed to simultaneously turn on common-mode main transistors and the corresponding additional transistor. 145895b FIG. 2