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The main target of this paper is optimizing the slot-opening shift for cogging torque reduction in BLDC motors. In a slot-opening shift method there is no skew, therefore the known drawbacks of the skewing is prevented. In the first part of the paper the slot-opening shift method for a BLDC motor is discussed. In this case, it is desired to find a method for cogging torque reduction without deteriorating...
This paper presents a method to reduce the cogging torque of PM BLDC with concentrated windings by combining teeth notching and rotor magnets skewing. For motors with concentrated windings, the method of reducing cogging torque by skewing rotor magnets is not quite available because of the large slot pitch. Then the method of teeth notching is also introduced in. The number of notches that should...
Based on the characteristics of transverse flux permanent magnet machine (TFPM), a novel multi-pole and multi-phase TFPM topology with assembled stator and concentrated flux rotor is presented in this paper. The associated electromagnetic fields of the prototype are investigated by means of three dimension equivalent magnetic network method (3DEMNM). It is shown the unique multi-phase structure of...
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