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AC motor controller with 180 degree conductive switchesAn ac motor controller is operated by a modified time-switching scheme where the switches of the inverter are on for electrical-phase-and-rotation intervals of 180.degree. as opposed to the conventional 120.degree.. The motor is provided with three-phase drive windings, a power inverter for power supplied from a dc power source consisting of six switches, and a motor controller which controls the current controlled switches in voltage-fed mode. During full power, each switch is gated continuously for three successive intervals of 60.degree. and modulated for only one of said intervals. Thus, during each 60.degree. interval, the two switches with like signs are on continuously and the switch with the opposite sign is modulated.
Document ID
20080004748
Acquisition Source
Johnson Space Center
Document Type
Other - Patent
Authors
Oximberg, Carol A.
Date Acquired
August 24, 2013
Publication Date
October 31, 1995
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
Patent Number: US-PATENT-5,463,300
Patent Application Number: US-PATENT-APPL-SN-112160
Funding Number(s)
CONTRACT_GRANT: NAS9-18200
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
US-PATENT-5,463,300
Patent Application
US-PATENT-APPL-SN-112160

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