资料介绍
The brushless DC fan (BDC Fan) has become the air
mover of choice in computing equipment, office
automation products, home entertainment systems,
and the like. Unlike conventional DC fans, the BDC fan
is mechanically robust because it contains no rotating
commutator/brush assembly to shed dust particles,
wear out, or act as an ignition source. In addition, its
magnetic coils are stationary and are usually mounted
within a rigid frame for superior structural integrity and
thermal dissipation. BDC fans are electrically quiet:
they lack the rotating magnetic fields of AC motors and
the arcing of conventional DC motors that broadcast
electronic noise. TB064
Intelligent Thermal Management Using Brushless DC Fans
to act as a “last line of defense” against system melt-
Author: Microchip Technology Inc..
down. A thorough design must take other factors into
account:
INTRODUCTION 1. The BDC fan consumes a significant amount of
current, yet may not always be required. It is
The brushless DC fan (BDC Fan) has become the air ther
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