Electricity: motive power systems – Braking – Automatic and/or with time-delay means
Patent
1979-02-26
1981-11-24
Smith, Jr., David
Electricity: motive power systems
Braking
Automatic and/or with time-delay means
318398, 318447, H02P 516
Patent
active
043027113
ABSTRACT:
A drive circuit is provided for controlling the energization of a DC motor as a function of speed to maintain the motor speed equal to a speed defined by a speed command signal. The speed command signal is summed with a velocity feedback signal to produce a speed error signal which is used as an input to a motor drive circuit. In accordance with the invention, the speed error signal is limited in order to continuously limit the current through the motor to a continuously changing maximum depending on the speed of the motor. During an initial part of the speed range, the limiting level is increased to maintain a constant maximum motor current. During an intermediate speed range, the limiting level decreases so as to sharply decrease current with increasing motor speed; and during a final speed range, the limiting level increases so as to gradually decrease current with increasing motor speed.
REFERENCES:
patent: 3179865 (1965-04-01), Carton
patent: 3293522 (1966-12-01), Lewis
patent: 3450973 (1969-06-01), Toby
patent: 3508132 (1970-04-01), Peterson
patent: 3548278 (1970-12-01), Soyameria
patent: 3649897 (1972-03-01), Messick
patent: 3735225 (1973-05-01), Raatz
patent: 3812409 (1974-05-01), Dinger
Morser Alfred H.
Szekely Paul
LandOfFree
DC Servomotor circuit having drive current controlled as a funct does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with DC Servomotor circuit having drive current controlled as a funct, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and DC Servomotor circuit having drive current controlled as a funct will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2176736