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Sensored BLDC Motor Control Using dsPIC30F2010

From Microchip Technology, Inc.
 

 
The dsPIC30F2010 is a 28-pin 16-bit MCU specifically designed for embedded motor control applications. AC Induction Motors (ACIM), Brushless DC (BLDC) and DC are some typical motor types for which the dsPIC30F2010 has been specifically designed. In this application note we discuss how the dsPIC30F2010 is used to control a sensored BLDC motor. Please refer to AN901 for details on how BLDC motors operate and general information on what needs to be done to run and control BLDC motors. This application note discusses the specific implementation using the dsPIC30F2010. It touches only briefly on BLDC motor details. BLDC motors are basically inside-out DC motors. In a DC motor the stator is a permanent magnet. The rotor has the windings, which are excited with a current. The current in the rotor is reversed to create a rotating or moving electric field by means of a split commutator and brushes. On the other hand, in a BLDC motor the windings are on the stator and the rotor is a permanent magnet. Hence the term inside-out DC motor.

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