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controller for a high-power, brushless dc motorDriving and braking torques controllable. Control circuit operates 7-kW, 45-lb-ft (61-N-m), three-phase, brushless dc motor in both motor and generator modes. In motor modes, energy from power source is pulse-width modulated to motor through modified "H-bridge" circuit, in generator mode, energy from motor is pulse-width modulated into bank of load resistors to provide variable braking torques. Circuit provides high-resolution torque control in both directions over wide range of speeds and torques. Tested successfully at bus voltages up to 200 Vdc and currents up to 45 A.
Document ID
19870000263
Document Type
Other - NASA Tech Brief
Authors
Fleming, David J.
(Martin Marietta)
Makdad, Terence A.
(Martin Marietta)
Date Acquired
August 13, 2013
Publication Date
June 1, 1987
Publication Information
Publication: NASA Tech Briefs
Volume: 11
Issue: 6
ISSN: 0145-319X
Subject Category
ELECTRONIC COMPONENTS AND CIRCUITS
Report/Patent Number
MFS-28168
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.