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Permanent overhead magnets

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BLDC Motor Contr ol with Hall Eff ect Sensors Using the 9S08MP

www.nxp.com

magnetic pole. Magnetization of the permanent magnets and their displacement on the rotor are chosen in such a way that the back-EMF (the voltage induced into the stator winding due to rotor movement) shape is trapezoidal. This allows a rectangular-shaped 3-phase voltage system (see Figure 3) to create a rotational field with low torque ripples.

  Permanent, Magnet, Permanent magnets

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