BRUSHLESS DC MOTORS FOR WINCHESTER DISC DRIVES
Spindle motors and in particular Winchester disc drives are becoming very dominant among the many applications of brushless d.c. motors. The flexibility and simplicity of design makes these motors ideal in an application where management of space is of great importance. The switching circuits necessary for these motors add controllability to the performance and make a high degree of speed-control a possibility. Economically, the brushless motor is acceptable even with the additional cost of the switching circuit. This has been made possible by the lower cost of electronic integrated circuits in the past few years.
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