Transcription of BLDC motor control with Hall sensor based on FRDM-KE02Z
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BLDC motor control with Hall sensor based on FRDM-KE02Z
1 IntroductionThe speed control circuits of DC motors are simple and easyto use, and hence are very popular in motor speed controlsystems. However, due to the brushes, DC motors suffer froma lower reliability. The brushless DC (BLDC) motor is alsoreferred as an electronically commuted motor . There are nobrushes on the rotor and the commutation is performedelectronically at certain rotor a DC motor with a BLDC motor places higherdemands on a control algorithm and a control circuit. First, the BLDC motor is usually a three-phase system;so, it has to be powered by a three-phase power supply. Second, the rotor position must be known at certainangles in order to align the applied most common way to control a BLDC motor is to useHall sensors to determine the rotor position. The controlsystem senses the rotor position and the proper voltage patternis applied to the application note describes the basic DC and BLDC motortheory and the implementation of the six-step commutationmethod on KE02 sub-family MCUs.
BLDC Motor Control with Hall Sensors Based on FRDM-KE02Z, Rev 0, 07/2013 Freescale Semiconductor, Inc. 9. 4 How to control BLDC motor with FRDM-KE02Z It is almost impossible to control BLDC motor directly with KE02Z MCU since driving motor needs high voltage and large current. Actually, the MCU mainly offers the control signal and detects the ...
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