3-Phase BLDC Motor Sensorless Control Using MC56F8013

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3-Phase BLDC Motor Sensorless Control using MC56F8013, Rev. 04 Freescale Semiconductor
ContentsChapter 1Introduction1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.1.1 Pump, Fan and Compressor Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.1.2 Why Sensorless Control?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.2 Freescale Hybrid Controller Advantages and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Chapter 2Control Theory2.1 The Brushless DC Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132.2 Power Stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162.3 Mathematical Description of the BLDC Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172.3.1 Power Stage — Motor System Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172.3.2 Mathematical Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182.3.3 Back-EMF Sensing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Chapter 3System Concept3.1 System Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253.2 Sensorless Drive Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 263.3 System Blocks Concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283.3.1 PWM Voltage Generation for BLDC Motors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283.3.2 ADC Sampling Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 293.3.3 Back-EMF Zero Crossing Detection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 303.3.4 Sensorless Commutation Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32Chapter 4Hardware4.1 Hardware Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454.1.1 Hardware Implementation Using EVM33395 Evaluation Motor Board . . . . . . . . . . . . . . . . 464.1.2 Hardware Implementation with Micro Power Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.2 Component Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.2.1 MC56F8013 EVB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 474.2.2 Power Stage Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 484.2.3 Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Chapter 5Software Design5.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 535.2 Main Software Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 533-Phase BLDC Motor Sensorless Control using MC56F8013, Rev. 0Freescale Semiconductor 5
Page 1: 3-Phase BLDC Motor SensorlessContro
Page 7 and 8: Appendix B.Glossary3-Phase BLDC Mot
Page 9: Chapter 1Introduction1.1 Introducti
Page 12 and 13: Introduction• Ability to sequenti
Page 14 and 15: Control TheoryVoltage120120Phase AP
Page 16 and 17: Control Theory2.2 Power StageThe vo
Page 18 and 19: Control Theory2.3.2 Mathematical Mo
Page 20 and 21: Control TheoryFigure 2-6 shows that
Page 22 and 23: Control Theory2.3.3.2 Effect of Mut
Page 24 and 25: Control TheoryChannel 1 in Figure 2
Page 27 and 28: Sensorless Drive Conceptcontroller.
Page 29 and 30: System Blocks Conceptcommutation co
Page 31 and 32: System Blocks ConceptThe Freescale
Page 33 and 34: System Blocks ConceptStart MotorAli
Page 35 and 36: System Blocks ConceptAfter several
Page 37 and 38: System Blocks ConceptPhase Back-EMF
Page 43 and 44: System Blocks Concept• Zero cross
Page 45 and 46: Chapter 4Hardware4.1 Hardware Imple
Page 47 and 48: Component Descriptions4.1.2 Hardwar
Page 49 and 50: Component DescriptionsThe SMOS eval
Page 51 and 52: Component DescriptionsMotorConnecto
Page 53 and 54: Chapter 5Software Design5.1 Introdu
Page 55 and 56:
Main Software Flow ChartMain LoopIs
Page 57 and 58:
5.3.1 Application State Machine Pro
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Chapter 6Application Setup6.1 Appli
Page 61 and 62:
Application Descriptionfault signal
Page 63 and 64:
The FreeMaster software supports th
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Application Setup6.2.1 MC56F8013 EV
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Projects FilesIn this application,
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Chapter 7Tuning7.1 IntroductionThe
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7.3.1.2 UDCBUS_FILT_INDEXFiltering
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Application Related ParametersOutpu
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Application Related Parameterscommu
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Motor Related ParametersThis parame
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Motor Related Parameters0: A top, B
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Motor Related ParametersFor a detai
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Motor Related ParametersCommutation
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Motor Related ParametersWhere;T_Cmt
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Motor Related Parameters7.5.5.1 Par
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Motor Related ParametersThe integra
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Appendix A.References1. Design of B
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Appendix B.GlossaryAC — alternati
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How to Reach Us:Home Page:www.frees
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3-Phase BLDC Motor Sensorless Control Using MC56F8013

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