3-Phase BLDC Motor Sensorless Control Using MC56F8013

The FreeMaster software supports the following control actions.• Sets the required speed of the motor• Sets the maximum DC-bus current (current limitation level)• Adjusts all PI controllers, motor, commutation parameters• Resets fault status• Performs speed stimulus/profileThe FreeMaster software displays the following information:• Required speed of the motor• Actual speed of the motor• Application status — stop/run/fault• Commutation status — stop/alignment/starting/running• DC-bus voltage and DC-bus current (filtered)• Phase voltages/back-EMF voltages• Fault status — No fault/DC over-voltage/DC under-voltage/DC over-current• Alarm status — current limitation• Scopes for DC-bus voltage, DC-bus current and speed• Recorders for DC-bus voltage, DC-bus current, and back-EMF voltagesApplication DescriptionStart the FreeMaster software window’s application, BLDC Sensorless.pmp. Figure 6-2 illustrates theFreeMaster software control window after this project has been launched.NOTEIf the FreeMaster software project (.pmp file) is unable to control theapplication, it is possible that the wrong load map (.elf file) has beenselected. FreeMaster software uses the load map to determine addressesfor global variables being monitored. After the FreeMaster software projecthas been launched, this option may be selected in the FreeMaster softwarewindow under Project/Select Other Map FileReload.3-Phase BLDC Motor Sensorless Control using MC56F8013, Rev. 0Freescale Semiconductor 63