3-Phase BLDC Motor Sensorless Control Using MC56F8013

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3-Phase BLDC Motor Sensorless Control using MC56F80138 Freescale Semiconductor
Chapter 1Introduction1.1 IntroductionThis reference design describes the design of a 3-phase brushless direct current (BLDC) drive based onFreescale’s DSP56F8013 dedicated motor control device.BLDC motors are very popular in many application areas. The BLDC motor does not have a commutatorand is, consequently, more reliable than the DC motor. The BLDC motor has other advantages over theAC induction motor. Because BLDC motors achieve higher efficiency by generating the rotor magneticflux with rotor magnets, they are used in high-end white goods (such as refrigerators, washing machines,and dishwashers), high-end pumps, fans, and other appliances that require high reliability and efficiency.The concept of the current application is of a closed-loop speed-controlled, trapezoidal BLDC drive, usinga back-EMF sensing control technique. It provides an example of BLDC motor control design using aFreescale digital signal processor (DSP).This reference design includes basic motor theory, system design concept, hardware implementation,software design, and tuning considerations, and includes the FreeMaster software visualization tool.1.1.1 Pump, Fan and Compressor ApplicationsBLDC motors are widely used in pump, fan and compressor applications because of their robust structure.A common feature of these applications is that they do not require position information; only speedinformation is required, and only to perform control. BLDC motors can be used without complex controlalgorithms. This reference manual presents an ideal solution using the BLDC motor, for such applications.1.1.2 Why Sensorless Control?In the BLDC motor, the rotor position must be known in order to energize the phase pair and to controlthe phase voltage. If sensors are used to detect rotor position, then sensed information must betransferred to a control unit (see Figure 1-1).3-Phase BLDC Motor Sensorless Control using MC56F8013, Rev. 0Freescale Semiconductor 9
Page 1: 3-Phase BLDC Motor SensorlessContro
Page 4 and 5: 3-Phase BLDC Motor Sensorless Contr
Page 7: Appendix B.Glossary3-Phase BLDC Mot
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
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Application Descriptionfault signal
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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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