Motor control circuit for a simulated weight stack

Details Motor control circuit for a simulated weight stack Motor control circuit for a simulated weight stack

A - Human Necessities

63

B

273/77

A63B 21/00 (2006.01) A63B 21/005 (2006.01) G05D 3/14 (2006.01) G05D 15/01 (2006.01) H02P 7/285 (2006.01) A63B 24/00 (2006.01)

Patent

CA 1280135

Abstract A control for a DC motor coupled to a user inter- face 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. A circuit is provided to generate a control voltage which follows the displacement signal when it is less than a maximum torque signal, the control voltage following the maximum torque signal when it is less than the displacement signal. The control voltage 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.

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