Method for the parallel connection of inverters by reference to extreme current values
AssigneeInventio AG
InventorRonald Rohner
Life of this patent
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Abstract
Method for the parallel connection of inverters by reference to extreme current values. The method achieves an equalizing regulation of the currents of several parallelly connected inverters each time the inverter with the highest current value is switched and that the instant of switching of all inverters, apart from the one switched first, depends on a comparison of its respective current value with the current value of at least one earlier switched inverter.
Claims16
A method for the parallel connection of a plurality of pulse-modulated inverters, wherein outputs of said inverters are connected by one of directly and via chokes, and wherein times of switching-on and switching-off of the parallelly connected plurality of inverters are determined by a control circuit, said method comprising the steps of:
- switching, when the current is rising, a one of said plurality of inverters which carries the greatest current;
- switching, when the current is falling, a one of said plurality of said inverters which carries the least current;
- and
- determining a time of switching of each of said plurality of inverters to be switched, wherein a first of said one of said plurality of inverters which is switched depends on an initial time at which the current of at least one of said plurality of inverters is switched before fulfilling a preset condition.
Dependencies are inferred from the claim text.