Electricity: motive power systems – Positional servo systems – With particular 'error-detecting' means
Patent
1990-04-20
1992-05-26
Ip, Paul
Electricity: motive power systems
Positional servo systems
With particular 'error-detecting' means
318434, 318439, 482 5, 482 91, 482132, 482900, A63B 2124, H02D 516
Patent
active
051171708
ABSTRACT:
A control for a DC motor coupled to a user interface to provide a counterforce which simulates a weight stack in an exercise machine. The control includes a position transducer coupled to the motor to provide a signal proportional to the displacement of the user interface. In one embodiment a circuit is provided to generate a control signal which follows the displacement signal when it is less than a maximum torque signal, the control voltage following maximum torque signal when it is less than the displacement signal. In a second embodiment a microprocessor control unit is responsive to the displacement signal to provide a control signal for the motor which starts increasing from a first value when the user interface is displaced an initial amount and which continues gradually increasing to a maximum value as the user interface is moved through a given displacement from the initial displacement. The control signal is used to soft start the motor such that the counterforce provided by the motor simulates a weight stack supported by a spring over small displacements of the user interface.
REFERENCES:
patent: 3582746 (1971-06-01), Nye
patent: 3716770 (1973-02-01), Habisohn
patent: 3848467 (1974-11-01), Flavell
patent: 3868554 (1975-02-01), Konrad
patent: 3902480 (1975-09-01), Wilson
patent: 4150324 (1979-04-01), Naito
patent: 4184678 (1980-01-01), Flavell et al.
patent: 4191913 (1980-03-01), Arnold et al.
patent: 4268782 (1981-05-01), Kawada et al.
patent: 4354676 (1982-10-01), Ariel
patent: 4366420 (1982-12-01), Omae et al.
patent: 4412158 (1983-10-01), Jefferson
patent: 4513381 (1985-04-01), Houser et al.
patent: 4544154 (1985-10-01), Ariel
patent: 4563003 (1986-01-01), Bugallo et al.
patent: 4569518 (1986-02-01), Fulks
patent: 4599545 (1986-07-01), Moriki
patent: 4602373 (1986-07-01), Dorfman
patent: 4638226 (1987-01-01), Damiano et al.
patent: 4710865 (1987-12-01), Higomura
patent: 4967862 (1990-11-01), Pong et al.
Englehardt William H.
Keane Martin A.
Ip Paul
Life Fitness
LandOfFree
Motor control circuit for a simulated weight stack does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motor control circuit for a simulated weight stack, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor control circuit for a simulated weight stack will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-422381