US 9,579,534 B2 · Methods and apparatus to power an exercise machine

Abstract

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.

Claims20

Dependent claims

A method to power an exercise machine, the method comprising:

measuring a power supply current produced by a user of the exercise machine;
measuring a rotations per minute of the exercise machine;
determining a power supply reference current, the power supply reference current based on a user selected wattage and the rotations per minute;
calculating, with a processor, a differential power supply current based on the power supply reference current and a measured current of a power supply of the exercise machine;
calculating, with the processor, a power supply duty cycle 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;
and
outputting the power supply duty cycle to a power output controller.

4 more elements

A tangible computer readable medium comprising instructions which, when executed, cause a machine to at least:

measure a power supply current produced by a user of the exercise machine;
measure a rotations per minute of the exercise machine;
determine a power supply reference current, the power supply reference current based on a user selected wattage and the rotations per minute;
calculate, with a processor, a differential power supply current based on the power supply reference current and a measured current of a power supply of the exercise machine;
calculate, with the processor, a power supply duty cycle 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;
and
output the power supply duty cycle to a power output controller.

4 more elements

Dependencies are inferred from the claim text.

Methods and apparatus to power an exercise machine

Life of this patent

Methods and apparatus to power an exercise machine

Life of this patent

Abstract

Claims20