Power converter with hold up
AssigneeEaton Industries GmbH
InventorMichael John Harrison
Life of this patent
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Abstract
A power converter providing required hold up for a primary converter, particularly a cycloconverter, without the required hold up capacity by an auxiliary converter including storage capacitors having the requisite capacity. The auxiliary converter may be isolated from the primary converter during normal operation and switched in during power supply discontinuities. The storage capacitors may be charged via a voltage step up circuit to achieve improved charge utilization. The storage capacitors may be charged via a charge path independent of the auxiliary converter output path so that the storage capacitor charging rate may be set independently.
Claims22
-40. (canceled)
A power converter comprising:
- a primary AC/AC converter having restricted hold up capacity including a switching stage and an output transformer;
- and
- an auxiliary converter including one or more storage capacitors for storing sufficient charge to provide power output hold up via an auxiliary power supply path during input power supply discontinuities, wherein the one or more storage capacitors are charged via a charging path independent of the auxiliary power supply path and during discontinuity of input power supply to the power converter the auxiliary converter supplies power from the one or more storage capacitors via the auxiliary power supply path to the output transformer to maintain power output.
A power converter comprising:
- a primary AC/AC converter having restricted hold up capacity including a switching stage and an output transformer;
- and
- an auxiliary converter including one or more storage capacitors charged via a voltage step up arrangement at a voltage higher than the voltage of the switching stage of the primary converter, wherein during discontinuity of input power supply to the power converter the auxiliary converter supplies power from the one or more storage capacitors to the output transformer to maintain power output.
Dependencies are inferred from the claim text.