Title:
CURRENT CONTROLLED MOTOR AMPLIFIER SYSTEM
Document Type and Number:
WIPO Patent Application WO2003038985
Kind Code:
A3
Abstract:
Aspects of a current controlled motor amplifier system (100) are provided. These aspects include a current source motor amplifier (100) comprising current source means on each leg of a top half (102) of the H bridge configuration and switching means on each leg of a bottom half (104) of the H bridge configuration. A motor (106) is coupled to the current source motor amplifier at a center portion of the H bridge configuration. Control circuitry is coupled to the current source motor amplifier for controlling the switching on of the current source motor amplifier for a predetermined time to operate the top half (102) of the H bridge configuration essentially as a linear constant current source and the bottom half (104) of the H bridge configuration in switching mode. The aspects also allow for simplified circuitry to protect against overvoltage conditions and eliminate electrical damping in applications with higher rotational velocities associated with induced back emf.
Inventors:
TIERLING KOLLIN
Application Number:
PCT/US2002/033485
Publication Date:
February 12, 2004
Filing Date:
October 22, 2002
Export Citation:
Assignee:
IMMERSION CORP (US)
International Classes:
H02M3/158; H02P7/00; (IPC1-7): H02P7/36
Foreign References:
| US6456024B1 | 2002-09-24 |
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