Brushless DC motors for disk drives

The use of brushless dc motors in rigid disk drives has become an important segment of the motor market. The flexibility and simplicity of design makes these motors ideal in an application where management of space is of great importance. The switching circuits of these motors add controllability to the performance and make a high degree of speed-control a possibility. The unique operating conditions in disk drives are reflected in the specifications describing these motors. In addition to the electrical and mechanical requirements, the materials used are strictly controlled and specified.

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