Invention Grant
- Patent Title: Pulse width modulated inductive load controller
- Patent Title (中): 脉宽调制感性负载控制器
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Application No.: US287124Application Date: 1988-12-20
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Publication No.: US4903188APublication Date: 1990-02-20
- Inventor: Suresh Madhavan , Adam Cohen , Roger Holman
- Applicant: Suresh Madhavan , Adam Cohen , Roger Holman
- Applicant Address: MA Shirley
- Assignee: Cambridge Aeroflo, Inc.
- Current Assignee: Cambridge Aeroflo, Inc.
- Current Assignee Address: MA Shirley
- Main IPC: H02M7/5387
- IPC: H02M7/5387
Abstract:
A pulse width modulated inductive load controller including a load switching circuit having a plurality of switches which are operative in pairs; each pair including first and second switch devices for controlling power to a load. Commutation logic enables various sequential combination of pairs of switch devices and a clock defines the operation period of each sequential combination of switch device pairs. Pulse width modulation circuitry controls the closed time interval of the switch devices during the operation period of each combination of switch device pairs. Transition control circuitry maintains closed at least one of the switch devices in each sequential combination of switch device pairs after the other switch device is opened, thereby assuring that any regenerated current from the previously energized load coils is provided a path to recirculate through the load.
Public/Granted literature
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Information query
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