Current controlled active flywheel type neutral point clamped in

Details Current controlled active flywheel type neutral point clamped in Current controlled active flywheel type neutral point clamped in

1989-12-04

1990-10-02

Beha, Jr., William H.

Electric power conversion systems

Current conversion

With means to introduce or eliminate frequency components

363 98, 363132, 318811, H02M 112, H02M 7521

Patent

active

049611291

ABSTRACT:
A power inverter having a neutral clamping circuit which is controlled for low harmonic output. The power inverter includes power transistors, a current sensor at the inverter output and a neutral clamping circuit connected between the inverter output and a neutral point in a DC power source which supplies the inverter. A controller circuit is connected to the current sensor, to the power transistors and to the neutral clamping circuit to selectively enable and disable the power transistors in the neutral clamping circuit in accordance with the inverter operation and current direction at the inverter output to minimize current transients at the load.

REFERENCES:
patent: 4443841 (1984-04-01), Mikami et al.
patent: 4635177 (1987-01-01), Shekhawat et al.
patent: 4670828 (1987-06-01), Shekhawat et al.

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