Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1987-07-07
1989-03-21
Shoop, Jr., William M.
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318329, 318434, G05B 500
Patent
active
048146781
ABSTRACT:
A speed control apparatus for a motor comprising a motor model formed of a motor current model and a motor speed model connected in cascade, a basic torque instruction signal being applied to the motor model, and first and second control loops comparing output signals from the motor current model and the motor speed model with an instantaneous actual motor current signal and an instantaneous actual motor speed signal respectively and generating first and second correction signal to be added to the basic torque instruction signal to form a corrected torque instruction signal which is applied to a motor current control circuit, whereby a speed oscillation is suppressed even when the motor is driving an oscillatory load.
REFERENCES:
patent: 4556830 (1985-12-01), Schwalm et al.
patent: 4656401 (1987-04-01), Ninomiya et al.
patent: 4684856 (1987-08-01), Kahkipuro
Matsuda Toshihiko
Omae Tsutomu
Sukegawa Takashi
Tobise Masahiro
Hitachi Ltd
Martin D.
Shoop Jr. William M.
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