3-Phase BLDC Motor Sensorless Control Using MC56F8013

Hardware• Configurable ADC pin connections• DC-bus over-voltage sensing and over-current sensing• Phase back-EMF sensing• Zero crossing detection• Tacho-dynamo interface for digital/analog sensing• Push-buttons (Reset, Up, Down)• RUN/STOP toggle switch• Indication LEDs (Power ON, Fault, User, PWM)• On-board power regulation from an external 12 VDC supplied power input• All GPIOA, GPIOB, GPIOC pins available to user via header pinsUNI-3ConnectorOvervoltage andOvercurrent TrimpotsPower SupplyConnectorFigure 4-3. MC56F8013 EVB4.2.2 Power Stage BoardsThe BLDC sensorless application can run on two low voltage (12 VDC) power stages. These powerstages are described below.4.2.2.1 EVM33395 Evaluation Motor BoardFreescale’s embedded motion control series SMOS evaluation motor board is a 12-volt, 8-amp,surface-mount power stage with an analog SMOS driver. In combination with one of the embeddedmotion control series control boards, it provides a development platform that allows algorithms to bewritten and tested without the need to design and build a power stage. It supports algorithms that use Hallsensors, encoder feedback, and back-EMF signals for sensorless control.3-Phase BLDC Motor Sensorless Control using MC56F8013, Rev. 048 Freescale Semiconductor