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Chapter: Special Electrical Machines - Permanent Magnet Brushless D.C. Motors

Classification Of BLPM Dc Motor

BLPM dc motors can be classified on the basis of the flux density distribution in the air gap of the motor. They are (a). BLPM Square wave dc motor [BLPM SQW DC Motor] (b).BLPM sinusoidal wave dc motor [BLPM SINE WAVE DC Motor]

CLASSIFICATION OF BLPM DC MOTOR

 

BLPM dc motors can be classified on the basis of the flux density distribution in the air gap of the motor. They are

 

(a). BLPM Square wave dc motor [BLPM SQW DC Motor]

 

(b).BLPM sinusoidal wave dc motor [BLPM SINE WAVE DC Motor]

 

(a) BLPM Square wave motor

These are two types: 180Ԏ pole arc. 120Ԏ pole arc.

 

Air gap flux density distribution in 180Ԏ BLPM SQW motor as shown in fig.



 

Fig 4.11 Air gap flux density distribution in 180Ԏ BLPM SQW motor.

 

Air gap density distribution of BLPM DC SQW motor with 120Ԏ pole arc, as shown in fig.


(b)BLPM Sine wave DC Motor

 

Air gap density distribution of BLPM dc sine wave motor as shown in fig.




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