D.C. fan control circuit device for linearly variable cooling

Details D.C. fan control circuit device for linearly variable cooling D.C. fan control circuit device for linearly variable cooling

1992-09-24

1994-11-08

Ro, Bentsu

Electricity: motive power systems

Switched reluctance motor commutation control

318434, 318472, 388903, 388934, H02P 602, G05D 2324, H02H 7085

Patent

active

053630246

ABSTRACT:
A control circuit for controlling a linearly variable speed cooling D.C. fan includes a stator including at least two pairs of main poles, two pairs of auxiliary poles and a Hall effect element provided at either of auxiliary poles. The control circuit also includes a rotor which as a casing, at least two pairs of N and S poles and a plurality of blades. Further, the control circuit includes a driving IC including an amplifier and two switching transistors, a temperature sensor detachable to a connector means, for determining a revolution speed of the D.C. fan that matches to the detected temperature, and a breakdown protection unit provided between said driving IC and said temperature sensor.

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patent: 5099181 (1992-03-01), Canon
Paul R. Emeral, "A Merged Hall Effect/Power IC," Proceedings of the IEEE 1987 Custom Integrated Circuits Conference, Portland, Oreg., May 4-7, 1987, pp. 280-284.

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