Definition of the brushless DC motor

The authors assert that previously available definitions of a brushless DC motor are inadequate to distinguish it from other types of brushless motors in the industry. A formal definition of a brushless DC motor is proposed. The definition includes the components of the motor and the types of circuits to energize the stator windings.<<ETX>>

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[2]  Syed M. Peeran,et al.  Brushless DC Motors Using Unsymmetrical Field Magnetization , 1987, IEEE Transactions on Industry Applications.