Proportional motor drive control

Details Proportional motor drive control Proportional motor drive control

1981-05-22

1983-12-27

Wayner, William E.

Automatic temperature and humidity regulation

Ventilator type

62186, 236 78C, F24F 700, F25D 1704

Patent

active

044225717

ABSTRACT:
An air conditioning control system has inputs for room temperature and air velocity voltage signals. Both signals are scaled and compared to determine which signal is larger, and the magnitude of the difference. The control circuit drives a variable speed damper motor in a direction determined by the greater of the two scaled input signals. The motor is driven at a rate proportional to the magnitude of the difference between the two signals. Means for setting the maximum and minimum open damper positions are provided within the control circuit.

REFERENCES:
patent: 3941310 (1976-03-01), Travaglio et al.
patent: 4042173 (1977-08-01), Boyer et al.
patent: 4284237 (1981-08-01), Harris et al.

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