Heat-dissipating fan
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United States of America Patent
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Jun 1, 2004
Grant Date -
Mar 18, 2004
app pub date -
Sep 18, 2002
filing date -
Sep 18, 2002
priority date (Note) -
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Abstract
A heat-dissipating fan comprises a rotor and a stator. The rotor includes a ring magnetic mounted to an outer periphery thereof. The stator includes a core. A plurality of poles integrally extend from the core of the stator. An induction coil is wound around at least one of the poles and located on an end of the pole. The heat-dissipating fan has only one stator having only one core with even-numbered poles integrally extending from the core. The fan wheel can be smoothly driven while increasing the amount of air output and improving the heat-dissipating efficiency. Further, since the poles are integral with the core, a closed loop of the magnetic field is formed when cooperating with the inductive ring magnet, thereby preventing magnetic field leakage.
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