Title: Interruption free inverter power supply

Abstract: An interruption free current supply system utilizing an inverter which is maintained in the state of readiness during normal operation with its drive unit in operation and synchronized with the a.c. voltage network but with ignition pulses from the drive unit blocked so that when switching to emergency power the ignition pulses can be enabled immediately for the inverter to take over the supply of power. A filter is permanently connected ahead of the load to filter high and low frequency interference on the line voltage and during emergency power operation to filter the output voltage of the inverter, the filter further acting as means to store energy during the switching interval.

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Inventors: Udvardi-Lakos, Janos (Erlangen, DT)

Application Number: 617193
Filing Date: 1975-09-26
Publication_date: 1976-12-21
Assignee: Siemens Aktiengesellschaft (Munich, DT)
Primary Class(es): 307/66
Other Classes:
US Patent Ref:

3683198	Aug, 1972	Thode	307/66.
3876922	Apr, 1975	Forstbauer	307/66.

Other Refs:
Primary Examiner: Hohauser, Herman
Assistant Examiner:
Attorney: Kenyon & Kenyon Reilly Carr & Chapin