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BLDC motor control with Hall Effect sensors using the 9S08MP

Posted: 16 Apr 2010 ?? ?Print Version ?Bookmark and Share

Keywords:Hall effect sensors? 9S08MP motor control? BLDC motor control?

This application note describes a brushless DC (BLDC) motor control system using a predefined hardware reference design.

This application uses the MC9S08MP 8bit MCU. The device has specialized control hardware that allows for reduced software overhead and higher control efficiency. BLDC motors are more frequently used over traditional brushed motors for their increased efficiency and reduced maintenance needs, mainly through elimination of wearable and friction-causing brushes. The reduced cost of embedded systems, plus the features in microcontrollers like the MC9S08MP make it more convenient to offer motor control systems for BLDC motors (even with their incremented cost) because of the need for permanent magnets. The benefits in ease of control usually outweighs the added cost of BLDC motors. Their speed is directly proportional to the applied voltage, low maintenance and ease of customization of control parameters.

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