Freescale MCF51AG128三相BLDC马达控制设计方案
The concept of the application is a speed and torque closed-loop BLDC drive using a sensorless BEMFzero crossing technique. It serves as an example of a BLDC motor control design using a FreescaleColdFire V1 Family MCU.
This reference design includes basic motor theory, system design concept, hardware implementation, andsoftware design, including the FreeMASTER software visualization tool.
图2.采用MCF51AG128无传感器三相BLDC马达演示板外形图
The motor control system is designed to drive a 3-phase Brushless DC Motor (BLDC Motor) in acombined speed/torque closed-loop. The application meets the following performance specifications:
• Sensorless Brushless DC Motor Control by Back-EMF zero-crossing sensing
• Targeted at the MCF51AGx platform
• Running on a low voltage (24 V) 3-phase Motor Control Drive board
• Control technique incorporates:
— Sensorless control with the combined speed/torque closed-loop
— Using an ADC for zero-crossing sensing
— Rotation in both directions
— Full 4-quadrant operation
— Start from any motor position with rotor alignment
— Manual interface (Direction switch, Up/Down push button control)
— FreeMASTER software control interface (motor run/stop, speed/torque set-up)
— FreeMASTER software remote monitor
— MCU initialization is done by Device Initialization tool (part of Processor Expert)大电流电感
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