Fan with brushless direct current motor

摘要

A fan includes a stator including a stator coil assembly ( 5 ) having a plurality of coils, and a circuit board ( 6 ) having a circuit to control the electrical current flowing through the coils, and a rotor including a hub ( 31 ) carrying a permanent magnet ( 33 ) facing to the stator coil assembly. At least two sides of the circuit board are substantially straight so that a plurality of such printed circuit boards can be compactly laid out side by side on a substrate ( 600 ) for producing the printed circuit boards.