Electricity: motor control systems – Closed loop speed control system for dc motor with commutator – Armature control by digital or combined analog and digital...
Patent
1992-05-20
1994-06-28
Shoop, Jr., William M.
Electricity: motor control systems
Closed loop speed control system for dc motor with commutator
Armature control by digital or combined analog and digital...
388904, 388906, 3889075, 388930, 318599, 318602, 318609, H02P 517
Patent
active
053254600
ABSTRACT:
A system and method for controlling the speed of a motor operating in an extremely low speed range and having a rotary pulse encoder which outputs a pulse whenever a rotation axle of the motor has rotated through a predetermined angle. The extremely low speed range is defined such that its pulse interval of the output pulses is longer than a speed control period of the system are disclosed, load torque estimated value observer is provided. The least order disturbance observer includes a first calculating block which calculates an estimated value of the motor speed n.sub.M ' (j) of a motor model on the basis of a torque command and a load torque estimated value: a second calculating block which calculates an average value of the motor speed at each pulse interval n.sub.M ' (j).
REFERENCES:
patent: 4680518 (1987-07-01), Kurakake et al.
patent: 4740885 (1988-04-01), Gose et al.
patent: 4851754 (1989-07-01), Sakamoto et al.
patent: 4862343 (1989-08-01), Nomura et al.
patent: 4885520 (1989-12-01), Sugimoto et al.
Matsumoto Tatsuoki
Mori Masayuki
Yamada Tetsuo
Kabushiki Kaisha Meidensha
Martin David
Shoop Jr. William M.
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