Regenerative AC/DC/AC power converter for a plurality of motors

Details Regenerative AC/DC/AC power converter for a plurality of motors Regenerative AC/DC/AC power converter for a plurality of motors

1995-03-24

1997-05-20

Sterrett, Jeffrey L.

Electric power conversion systems

Current conversion

Including an a.c.-d.c.-a.c. converter

363 71, 318377, H02M 5458

Patent

active

056318138

ABSTRACT:
An inverter apparatus which controls an induction motor, has a forward converting unit, and can be combined with a power regeneration unit. The regenerative power converting unit has circuit arms, each being a parallel connection of a switching element and a diode, that are bridged. As a result, a DC voltage output from a forward converting unit that converts an input from an AC power supply into a DC voltage and outputs the DC voltage is inversely converted into an AC voltage and the AC voltage is returned to the AC power supply. A plurality of inversely converting units also are provided on the DC output side of the forward converting unit, and in each of those units, there are arms, each being a parallel connection of a switching element and a diode, that are bridged. The assignment can improve the utilization efficiency of a diode bridge of an inverter apparatus and a transistor bridge of a power regeneration apparatus when the inverter is used in applications where travel and elevation are handled as one set, e.g., an automated storage/retrieval system.

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patent: 5130617 (1992-07-01), Oshimia et al.

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