Electricity: motive power systems – Battery-fed motor systems
Patent
1992-03-30
1994-07-26
Shoop, Jr., William M.
Electricity: motive power systems
Battery-fed motor systems
318527, 318300, 318381, 318251, H02P 100
Patent
active
053329546
ABSTRACT:
Optimal constructions for two motor/controller configurations are disclosed. The controller structure includes an H-bridge for controlling field current using synchronous-rectification of MOSFET devices, and a circuit for chopping the armature current using synchronous-rectification of MOSFET devices arranged in a half bridge. The controller may be configured with a series-wound or a separately excited DC traction motor. In the series-wound motor/controller configuration, the field and the armature current are separately controlled. In the separately excited motor/controller configuration, the field of the motor is preferably wound so that the rated field current is achieved at about 20% of the rated battery voltage. This provides a separately excited motor in which the field current can be boosted by a factor of 5 to achieve high start-up and low speed torques which match the torque outputs of a series-wound motor under similar operating conditions.
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Article entitled "Microprocessor-Based High-Efficiency Drive of a DC Motor," IEEE Transactions on Industrial Electronics, vol. IE-34, No. 4, Nov. 1987, pp. 433-440.
Martin David
Shoop Jr. William M.
Solaria Research Enterprises Ltd.
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