Methods and apparatus to power an exercise machine

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United States of America Patent

PATENT NO 9579534
SERIAL NO

14026928

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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Methods and apparatus to power an exercise machine are disclosed herein. An example method includes measuring a power supply current produced by a user of the exercise machine. A rotations per minute of the exercise machine is measured. A power supply reference current is determined, the power supply reference current based on a user selected wattage and the rotations per minute. A differential power supply current is calculated based on the power supply reference current and a measured current of a power supply of the exercise machine. A power supply duty cycle is calculated based on a previous power supply duty cycle, a time constant, the differential power supply current, and a previous differential power supply current, the power supply duty cycle to control power supplied to a console of the exercise machine. The power supply duty cycle is output to a power output controller.

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Patent Owner(s)

Patent OwnerAddress
LIFE FITNESS LLC9525 BRYN MAWR AVENUE ROSEMONT IL 60018

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
David, Ferdinand Hainesville, US 3 59
Jiang, Ming Villa Park, US 245 5621
Sutkowski, Robert Homer Glen, US 3 59
Wong, John Buffalo Grove, US 56 1305

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