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  • DC Motors: Principle of Operation
    Electric motors run by electromagnetism. However, there are also other types of motors that utilize electrostatic forces or piezoelectric effect. In the case of a PMDC {Permanent Magnet DC) motor, motion is produced by an electromagnet (armature) interacting with a fixed field magnet (housing
  • Slotless vs Slotted Brushless DC Motor Designs
    Due to their mechanical commutation, brushed DC have limited operational lifetime and are confined to low speeds typically less than 12K rpm.
  • Sensorless BLDC Control with Back-EMF Filtering
    This application note describes a sensorless brushless DC (BLDC) motor control algorithm, implemented using the dsPIC (R) digital signal controller (DSC). The algorithm works by digitally filtering the back-Electromotive Force (back-EMF) on each phase of the motor and determining when to commutate

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