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

1 IntroductionThis application note describes a brushless DC (BLDC) motorcontrol system Using a predefined hardware reference design. Itexplains the hardware concept (not in detail), for further detailsabout the hardware, look for the user guide titled 3-PhaseBLDC/PMSM Low-Voltage Motor Control Drive (documentLVMCDBLDCPMSMUG) and the user manual titledMC9S08MP16 Controller Daughter Board for BLDC/PMSMM otor Control Drive (document LVBLDCMP16 DBUM) application uses the MC9S08MP 8-bit microcontroller. Thedevice has specialized control hardware that allows for reducedsoftware overhead and higher control motors are more frequently used over traditional brushedmotors for their increased efficiency and reduced maintenanceneeds, mainly through elimination of wearable andfriction-causing brushes.

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.

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  Permanent, Magnet, Permanent magnets

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