Motor speed control apparatus for motors
Patent 5737483 Issued on April 7, 1998. Estimated Expiration Date: 
October 25, 2015. 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.
October 25, 2015. 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 ReferencesMethod of detecting the speed of a motor Speed controlling system and a predictor Method and apparatus for isolating and identifying periodic Doppler signals in a turbine Patent #: 5471880 InventorsApplicationNo. 548047 filed on 10/25/1995US Classes:388/805, By phase or frequency modification318/609, "Reset" systems (P.I.)318/632, With compensating features388/902, Compensation388/906, Proportional-integral system388/907.5Computer or microprocessorExaminersPrimary: Masih, KarenAttorney, Agent or FirmForeign Patent References
International ClassH02P 005/06AbstractA motor speed control apparatus is provided in which the controllable frequency band of the control system can be sufficiently enhanced with a comparatively simple structure even if the frequency generator equipped into the motor is low in output frequency and the rotational accuracy can be highly improved even if the disturbance of high frequency components of load torque is applied to the motor. The frequency band of the control system can be improved by using the estimated speed signal as the speed feedback signal. A motor speed control apparatus superior in disturbance control characteristic can be realized through the feed forward compensation of an estimated load torque.Field of SearchBy phase or frequency modificationField control, or field and armature control, by analog (only) circuitry Computer or microprocessor Compensation Proportional-integral system Monitoring means Load or torque "Reset" systems (P.I.) With rate (P. I. D.) (e.g., reset windup prevention) With compensating features SELF-COMMUTATED IMPULSE OR RELUCTANCE MOTORS SPACE-DISCHARGE-DEVICE COMMUTATED MOTOR Digital or numerical systems Program- or pattern-controlled systems With "feed-rate" control | |
