Control system for a separately excited DC motor
July 8, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesD.C. motor control Method and apparatus for high efficiency operation of electromechanical energy conversion devices Speed control for truck Turning speed controller for electric vehicles having dual drive motors Traction motor optimizing system for forklift vehicles Traction motor controller for forklift vehicles Optimizing system for vehicle traction motors Speed-dependent traction motor controller for vehicles Regulation system for decoupled efficiency optimized operation of DC traction motors Speed regulation of DC motor using current sensing means InventorsApplicationNo. 889227 filed on 07/08/1997US Classes:388/801, Field control, or field and armature control, by digital or combined analog and digital circuitry318/432, CONSTANT MOTOR CURRENT, LOAD AND/OR TORQUE CONTROL388/907.5Computer or microprocessorExaminersPrimary: Ro, BentsuAttorney, Agent or FirmForeign Patent References
International ClassH02P 005/178AbstractA microprocessor based control system generates optimal field and armature currents for a separately excited DC motor. The current levels for the field and armature coils are set by feedback control. Armature and field current setpoints are established in accordance with tabulated values selected for providing a required torque and speed in an optimal fashion. A table of corresponding values of armature voltage is also maintained. If the actual armature voltage is below the calculated value, then the field current setpoint is boosted by an amount sufficient to optimize output torque.Other References
Field of SearchField control, or field and armature control, by digital or combined analog and digital circuitryBridge circuit Computer or microprocessor ALTERNATING CURRENT COMMUTATING MOTORS Universal or A.C.-D.C. motors CONSTANT MOTOR CURRENT, LOAD AND/OR TORQUE CONTROL Control of motor load or device driven | |
