Current inverter

Abstract

The invention relates to a current inverter comprising a bridge circuit equipped with four switch elements (S3, S4, S5, S6), wherein two opposite connector clamps (1, 2) of the bridge circuit are connected to the direct current part of the current inverter, and the other two connector clamps (3, 4) of the bridge circuit are connected to the alternating current part of the current inverter. Directcurrent and alternating current can be converted into each other when the switch elements (S3, S4, S5, S6) are controlled appropriately. According to the invention, in the direct current part, a firstdirect current sided switch element (SI) is coupled to the positive direct current clamp, an inductive resistance (LI) that is mounted in series between the first switch element (SI) and the first connector clamp (1) of the bridge circuit and a diode (D2) are arranged downstream from the first switch element (SI). A second direct current-sided switch element (S2) can be mounted in series betweenthe inductive resistance (LI) and the diode (D2), and a second connector clamp (2) of the bridge circuit can be mounted such that in the closed state, the inductive resistance (Ll) connects to the second connector clamp (2) of the bridge circuit.

Description

technical field [0001] The invention relates to an inverter with a bridge circuit having four switching elements, wherein two opposite terminals of the bridge circuit are connected to the DC voltage part of the inverter, and the bridge circuit's The other two terminals are connected to the AC voltage part of the inverter, wherein, according to the preamble of claim 1 , the DC voltage and the AC voltage can be converted into each other by suitable control of the switching elements. Background technique [0002] Inverters are widely used in electrotechnical engineering, especially in alternative power generation systems such as fuel cell and photovoltaic systems (so-called "static systems") or wind power plants ( The so-called "rotary system"). Stationary systems, in order to feed power into the supply network, require an inverter that converts the accumulated DC power into AC power and feeds it in a manner suitable for the grid. Rotating systems generate AC power, but this ...

AI Technical Summary

Problems solved by technology

In this case, however, expensive components such as FRED (Fast Recovery Epitax. Diode (Fast Recovery Epitax. Diode)) FETs are usually required for the switching elements of the bridge circuit, because high switching frequencies must sometimes be guaranteed

This has a negative impact on the costs of conventional circuit arrangements and also impairs the efficiency of conventional inverters, since unavoidable switching losses are associated with each switching process

Images