Snowmobile handlebar heater control

Details Snowmobile handlebar heater control Snowmobile handlebar heater control

1996-01-11

1998-05-26

Dougherty, Thomas M.

Electricity: single generator systems

Automatic control of generator or driving means

Thermal conditions

322 36, 322100, 219240, H05B 100

Patent

active

057571651

ABSTRACT:
A solid state control circuit controls handlebar heaters on a snowmobile or similar responding loads. Circuit is supplied by AC voltage with variations in frequency and waveform of the AC input. A portion of this input is rectified and compared with a rectified portion of the output voltage. The difference between these two signals is used to supply two amplifying devices. A control signal to a switching device selectively connects one polarity of the AC to the load. The circuit is adapted to be disabled by the application of an external voltage typically from a brake light switch and bulb. The opposite polarity of the waveform is controlled from the AC to the load by sensing the DC component across the load and using a second switching device to drive this DC value to a negligible value. Components are incorporated that are sensitive to temperature and also waveform to produce higher output heating at high vehicle speed and lower operating ambient temperatures or airflows.

REFERENCES:
patent: 3755685 (1973-08-01), Minks
patent: 4490779 (1984-12-01), Minks
patent: 4791349 (1988-12-01), Minks
patent: 5117178 (1992-05-01), Roth
patent: 5202811 (1993-04-01), Minks
patent: 5349161 (1994-09-01), Bockholt
patent: 5525896 (1996-06-01), Minks

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