Transcription of BLDC Motor Contr ol with Hall Eff ect Sensors Using the …
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BLDC Motor Contr ol with Hall Eff ect Sensors Using the …
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. The reduced cost of embedded systems,plus the features in microcontrollers like the MC9S08MP makeit more convenient to offer Motor control systems for BLDC motors (even with their incremented cost) because of the needfor permanent magnets.
Figure 1.Three-phase BLDC/PMSM low voltage motor control drive 2.1 BLDC Basics The BLDC basics are: • The 3-Phase BLDC motor • Commutation—Moving the BLDC motor • Controlling speed and torque 2.1.1 Three-Phase BLDC Motor The brushless BLDC motor is also referred to as an electronically commuted motor. There are no brushes on the rotor ...
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