Device for Subjecting Single- Or Three-phase Voltage Source to Parallel Operation By Equal Rating

PROBLEM TO BE SOLVED: To provide a device wherein two or more inductively coupled inverters are subjected to parallel operations by an equal rating, and therefor, any additional synchronizing line and/or communicating line are unnecessary. ; SOLUTION: In the device, each inverter has a controlling circuit whose purpose is to control their respective output voltages. To each of controlling circuits, a reference voltage urefis given as a common desired voltage. A frequency f is obtained from an effective power P by considering a predetermined frequency static characteristic. An amplitude 3/4 u 3/4 of the reference voltage is obtained from a reactive power Q of the inverter by considering the predetermined voltage static characteristic. The value of a phase [phi] of the reference voltage urefis also obtained from the effective power P by considering a predetermined weighting factor St1'. The oscillation and accumulation of the components of the effective power are thereby prevented. ; COPYRIGHT: (C)2010,JPO&INPIT

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Patents:
JP 2,010,110,209

Inventor(s): ENGLER ALFRED

Type of Offer: Sale



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