For More Information On This Product | Motorola M68HC08 manual

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

User Guide

Application Hardware and Software Configuration

NOTE: Application control from PC master software requires that PC master software control mode must be set. Before changing PC master software/manual control mode (by PC Master Mode Radio button) the controller board START/STOP switch must be set to STOP. This is a protection feature that prevents the motor from unexpected starts!

•Start the motor (Start Motor button)

NOTE: To start the motor with PC master software control mode, two conditions must be fulfilled. START/STOP switch on the controller board must be set to START and Start Motor button on PC master software control page must be “pressed down”.

•Stop the motor (Stop Motor button)

•Set the required speed of the motor (via bar graph)

•Clear failures (Clear Failures button)

PC master software displays the following information:

•Required speed of the motor

•Actual speed of the motor

•dc-bus current

•Temperature of the power stage

•Fault status (no fault, over-voltage, under-voltage, or over-current in dc-bus)

•Motor status — running/stopped

NOTE:	Hardware board identification is not implemented in the software.
	Therefore, the PC master software control window displays Power Stage
	board, Optoisolation board: Not Recognized.
	If the fault status is different from the no faults (when over-current,
	over-voltage, or under-voltage fault), the red LED blinks and the motor is
	stopped. This state can be exited by application RESET or Clear
	Failures button on the PC master software control page.
NOTE:	It is strongly recommended that you inspect the entire application to
	locate the source of fault before starting it again.
DRM028 — Rev 0	Designer Reference Manual


MOTOROLA	User Guide	125
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Motorola M68HC08 manual For More Information On This Product

Contents

Freescale Semiconductor, Inc M68HC08 For More Information On This Product Designer Reference Manual Rev Sensorless Bldc Motor Control Using MC68HC908MR32 Revision history List of Sections List of Sections Table of Contents Table of Contents Title List of Figures List of Figures List of Tables List of Tables Benefits of the Solution ContentsIntroduction Application Functionality Introduction System Concept System Description System Description System Specification Software written in C language specifications are listed Software SpecificationSoftware parameter tuning to a customer motor Software Specifications High-Voltage Hardware Set Specification Hardware and Drive Specifications Motor -Brake Set High Voltage Hardware Set Specifications Low-Voltage Hardware Set Specification Low-Voltage Evaluation Hardware Set SpecificationLow Voltage Evaluation Hardware Set Specifications Low Voltage Hardware Set Specifications Bldc Motor Targeted by This Application Bldc Motor ControlBrushless DC Motor Control Theory Semiconductor, Inc Bldc Motor Control Brushless DC Motor Control Theory Bldc Motor Back EMF and Magnetic Flux Why Sensorless Control? 2 3-Phase Bldc Power Stage Power Stage Motor Topology Indirect Back EMF Sensing Stator Winding Equations Same expressions can also be found for phase a and B Effect of Mutual Inductance Phase Voltage Waveform Mutual Inductance Effect Detail of Mutual Inductance Effect Effect of Mutual Phase Capacitance Mutual Capacitance Model 10. Distributed Back-EMF by Unbalanced Capacity Coupling 11. Balanced Capacity Coupling Back-EMF Sensing Circuit Inc Alignment Starting Back-EMF Acquisition Running Used Control TechniqueSensorless Commutation Control Alignment 14. Commutation Control Stages Running 15. Alignment Freescale Semiconductor, Inc Commutation time calculation is shown in Figure Running Commutation Time Calculation 17. Bldc Commutation Time with Zero Crossing Sensing Service of received back-EMF zero crossing Where Starting Back-EMF Acquisition Freescale Semiconductor, Inc 18. Vectors of Magnetic Fields 19. Back-EMF at Start Up Computation coefficients are different Starting Commutation Time CalculationRunning Commutation Time Calculation, but the following PC Master Software Application ControlSpeed Control PC Master Software Communication Commands Communication with PC Master Software Specifications Name Type Representing Description Range PC Master Software API Variables BIT6 Reserved MotorStatusDef, FailureDef BIT2 Reserved SpeedRangeMaxRPM*PerSpeedMAXRange/PerZCrosFltT2 PerSpeedMAXRange and zero crossing period PerZCrosFltT2 Freescale Semiconductor, Inc Hardware Design System Configuration and DocumentationMC68HC908MR32 Control Board For High-Voltage Hardware Set cofiguration EVM Motor Board Phase Low Voltage EVM Bldc Motor For Low-Voltage Evaluation Motor Hardware Set configurationLow-Voltage Hardware Set configuration Components will describe the individual boards High-Voltage Hardware System Configuration High-Voltage Hardware Set Configuration See References Described in MC68HC908MR32 Control Board User’sManual Motorola document order number Low-Voltage Evaluation Motor Hardware System Configuration Low-Voltage Evaluation Motor Hardware Set Configuration System configuration for low-voltage hardware set is shown Low-Voltage Hardware Set Configuration Low-Voltage Hardware System Configuration 1 MC68HC908MR32 Control Board All HW Sets ComponentsReferences Electrical characteristics in -1apply to operation at 25C 4shows a block diagram of the board’s circuitry High-Voltage Hardware Set Components Electrical Characteristics of Control Board1 3-Phase AC/BLDC High Voltage Power Stage Phase AC High Voltage Power Stage Optoisolation Board Electrical Characteristics of Power Stage Electrical Characteristics Electrical Characteristics of the Optoisolation Board EVM Motor Board 3 3-phase Bldc High Voltage Motor with Motor BrakeLow-Voltage Evaluation Motor Hardware Set Components Electrical Characteristics of the EVM Motor Board Electrical Characteristics of the EVM Motor Board2 3-phase Low Voltage EVM Bldc Motor Characteristics of the Bldc motor Low-Voltage Hardware Set Components 1 3-Ph AC/BLDC Low Voltage Power Stage Block Diagram Section 2 3-phase Bldc Low Voltage Motor with Motor Brake Software Design Data Flow Main Software Flowchart State DiagramIntroduction Data Flow Software Variables Software Variables and Defined ConstantsImportant system variables are listed in Table Process Measurement Start/Stop Switch Reading and Start/Stop DecisionSys3Def Process Back, EMF Zero Crossing Sensing Main Data Flow Part1 Process Fault Control Fault Stop Freescale Semiconductor, Inc Main Data Flow Part 2 Alignment, Starting Closed Loop Control System Process Desired Speed Setting Process Alignment Control Processes Commutation and Zero Crossing Preset and SetBldc Speed Control and Calculation Bldc Commutation and Zero Crossing Selection Main Software Flowchart Main Software Flowchart Freescale Semiconductor, Inc Main Software Flowchart Main Software Loop Freescale Semiconductor, Inc Freescale Semiconductor, Inc Software Flowchart Interrupts State Diagram Application State Transitions Initialize MCU State diagram for this software is shown in FigureInitialize Application Stand-By Freescale Semiconductor, Inc Stand-by State Align State Starting Commutation Time Calculation Freescale Semiconductor, Inc 10. Back-EMF Acquisition Commutation Time Calculation Service of CommutationSet Explained in 5.5.5 Back-EMF Acquisition State Service of Received Back-EMF Zero CrossingRunning State Over Current 11. Running State Stop State 12. Stop State Fault State See Figure Implementation NotesSoftware Files Software files and structure are described in section Set Bldc Commutation and Bemf Zero Crossing Selection Preset Bldc Commutation and Bemf Zero Crossing SelectionBldc Commutation and Zero Crossing Selection Desired Speed Calculation Bldc Speed Control and CalculationPWM Duty Cycle PWMValMax = DUTYPWMMAX*MCPWMMODULUS Timer Timers Function TIMACh3Int Designer Reference Manual DRM028 Rev 108 Software Design Application Suitability Guide User GuideMinimal Application Speed Motor’s nominal speed Motor Suitability Maximal Application SpeedVoltage Closed Loop Mutual Inductance Designer Reference Manual DRM028 Rev 112 User Guide Hardware setups are shown in -1, -2, Application Hardware and Software ConfigurationHardware Configuration Low-Voltage Evaluation Motor Hardware Set Configuration High-Voltage Hardware Set Configuration Low-Voltage Hardware Set Configuration Controller Board Settings Software Setup EVM Board SettingsEVM board settings are the same for all hardware platforms Application HC08 Software Files \bldczerocros08MR32\sources\bldc08.c, main program Application PC Master Software Control Files Execute from Evaluation Board Software ExecutionBuild Execute from Pre-programmed MCU When the software is built, the S-record fileBldczerocros08mr32MMDS.sx is generated Application Control PC Master Software Remote Operating Mode Manual Operating Mode PC Master Software Control Window For More Information On This Product Tuning for Customer Motor User Guide Tuning for Customer Motor Follow-up for Software Customizing to Customer Motor Follow-up for Advanced Software Customizing Start the PC master software parameters tuning application To have PC master software installed on your PC computer 11. PC Master Software Parameters Tuning Control Window Software Parameters Setting Follow-up Labels in the File const.h Parameters File Selection Software Customizing to Power Stage\bldczerocros08MR32\sources\constcustlv.h, definitions for Example of Software Customizing to Hardware Range 0,infinity Voltage Setting Hardware CustomizingCurrent Setting Hardware Customizing Modified maximal measurable voltage is 55 V, so set Example of Software Customizing to Hardware Maximal and Minimal Voltage Limits Setting Software Customizing to Motor Voltage and Current SettingsDetailed description starts here Range 0,VOLTRANGEMAX Range 0,CURRENTRANGEMAXA Maximal and Minimal Current Limits Setting Range 0,8 Alignment Current and Current Regulator SettingCurrent during alignment state before motor starts Α From Evaluation Board Parameters Tuning with PC Master Software Project FileSet constcustx.h 12. PC Master Software Current Parameters Tuning Window Designer Reference Manual DRM028 Rev 142 User Guide MUSTCHANGEEXPERnn in file constcustx.h Commutation time period to discharge coil current ∝s Commutation Parameters Start-up Constants and Maximal Commutation Period Range -128,127 Start-up PeriodMaximal commutation period limit ∝s Constcustx.h Alignment Current and Current Regulator Setting 6.5.4.3Constcustx.h Set #define Percmtstartus in constcustx.h Ensure Percmtstartus =PERCMTMAXUS /2 Constcustx.h file #define Speedpiregigain 13. PC Master Software Start Parameters Tuning Window Range 0,255 Software Customizing to Motor Speed Control SettingNumber of commutations per motor revolution Range 0,SPEEDRANGEMAXRPM Maximal speed range rpmMinimal speed of the drive rpm Speedminrpm = 0.07 to 0.5SPEEDMAXRPM User Guide 153 Execute from Evaluation Board Start motor see Application Control and PC Master Software Set PC master software control mode and start motor seeRemote Operating Mode For the PWM frequency setting, follow the label PWM Frequency and Current Sampling Period SettingPWM frequency setting is provided by PWM Frequency Current Sampling Period PWM Frequency SettingPWM period = Periodpwmus = SETPERPWM*2 EQ CANCHANGEPERCURSAMPn in const.h file Conclusion Software Parameters Setting and TuningPERCST1US = Periodpwmus * Setpercs ∝s Current Sampling Instant User Guide 159 Designer Reference Manual DRM028 Rev 160 User Guide Appendix A. References AN1627, Motorola Motor using MC68HC705MC4 document order number SG40N Appendix B. Glossary Glossary Serial communications interface module SCI a module that Designer Reference Manual DRM028 Rev 166 Glossary Freescale Semiconductor, Inc HOW to Reach US USA/EUROPE/LOCATIONS not Listed