Adjustable frequency drive systems and methods of employing power compensation

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 11300632
APP PUB NO 20200191878A1
SERIAL NO

16223865

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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An apparatus, such as an adjustable frequency drive (AFD), includes an inverter configured to be selectively coupled to a motor in a first mode and an AC line in a second mode and a control circuit configured to operate the inverter as a motor drive in the first mode and as a power compensator in the second mode. The power compensator may provide power factor correction. The control circuit may include a scalar controller configured to control the inverter according to a voltage vs. frequency characteristic determined by a field weakening point reference and the control circuit may vary the field weakening point reference in the second mode. The inverter may have an input coupled to a DC bus and the control circuit may be configured to adjust a frequency of the inverter in the second mode to increase a voltage on the DC bus.

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Patent Owner(s)

Patent OwnerAddress
EATON INTELLIGENT POWER LIMITED30 PEMBROKE ROAD DUBLIN 4 D04 Y0C2 D04 Y0C2

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Farr, Thomas Arthur Candler, US 11 44
Maurin,, Jr John David Arden, US 2 3
Simms, Stan Rex Arden, US 11 17

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