Inverter for converting a direct voltage into an alternating vol

Details Inverter for converting a direct voltage into an alternating vol Inverter for converting a direct voltage into an alternating vol

1983-02-02

1988-10-04

Salce, Patrick R.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 98, H02M 114

Patent

active

047759232

ABSTRACT:
In an inverter for converting a direct voltage into an alternating voltage, having a number of n circuit units connected in series between two outputs, each circuit unit comprising a series connection, having a direct voltage source and a switch with a switching connection, and a unidirectionally conducting circuit element disposed in parallel with the series connection, the inverter having a control unit which operates the switching connections of the switches to render the switches conductive or non-conductive, in order to minimize the circuitry the voltage values of the direct voltage sources have the values U=U.sub.O.2.sup..nu. (.nu.=0, . . . n-1, .sub.O having any desired value), and the control unit is an analog-digital converter (1) having an analog input and digital outputs (A.nu.), whose analog input receives a reference alternating voltage and from whose digital outputs the 2.sup..nu. output is connected to the switch connection (S.nu.) of the switch of the circuit unit containing the voltage source with the voltage value U.nu.. Application to mains-connected photovoltaic solar energy installations.

REFERENCES:
patent: 3579081 (1971-05-01), Bates
New Type of Transformerless High Efficiency Inverter, Naaijer, G. J. Oct. , 1980, France, pp. 1068-1072.

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