Electricity: motive power systems – Constant motor current – load and/or torque control – Control of motor load or device driven
Patent
1993-01-07
1994-03-22
Ro, Bentsu
Electricity: motive power systems
Constant motor current, load and/or torque control
Control of motor load or device driven
318254, 388819, H02P 706, H02P 602
Patent
active
052967875
ABSTRACT:
A method for regulating a motor current in phase windings of a brushless d.c. motor, wherein current is applied to the phase windings individually via an electronically controllable, d.c.-voltage intermediate-circuit converter with switchable semiconductor valves and respective freewheeling diodes connected in parallel with each thereof in individual bridge arms, and an actual value of the motor current is measured exclusively in the d.c.-voltage intermediate circuit, includes switching off, in a motor mode of operation, only one switchable semiconductor valve of the energized bridge arms for a period of time dependent upon the rotational speed of the motor when a reference value of the motor current is reached.
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Albrecht Kai
Meyer Helmut
Greenberg Laurence A.
Heidelberger Druckmaschinen AG
Lerner Herbert L.
Ro Bentsu
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