Motorola M68HC08 EVM Board Settings, EVM board settings are the same for all hardware platforms

Page 117

Freescale Semiconductor, Inc.

Freescale Semiconductor, Inc.

User Guide

Application Hardware and Software Configuration

PC Master S/W	START/STOP	SPEED
RS232	switch	potentiometer

to evaluation
board	connect
indication	JP13!
LEDs

to power stage board

Figure 6-4. Controller Board

6.4.1.5 EVM Board Settings

EVM board settings are the same for all hardware platforms.

CAUTION: Remember, the MMDS MCU clock must be set to 4 MHz. Change the crystal oscillator, or set oscillator W1 to MMDS, and set for 4 MHz in the debugger!

6.4.2 Software Setup

In order to run the sensorless BLDC application the following software is needed:

• Metrowerks compiler for HC08 — installed on your PC computer

• Sensorless BLDC application HC08 software files (located in bldc_zerocros08MR32 directory)

DRM028 — Rev 0		Designer Reference Manual

MOTOROLA	User Guide	117
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Contents Freescale Semiconductor, Inc M68HC08For More Information On This Product Designer Reference Manual Rev Sensorless Bldc Motor Control Using MC68HC908MR32Revision history List of Sections List of Sections Table of Contents Table of Contents Title List of FiguresList of Figures List of Tables List of Tables Benefits of the Solution ContentsIntroduction Application FunctionalityIntroduction System Concept System DescriptionSystem Description System Specification Software written in C language specifications are listed Software SpecificationSoftware parameter tuning to a customer motor Software SpecificationsHigh-Voltage Hardware Set Specification Hardware and Drive SpecificationsMotor -Brake Set High Voltage Hardware Set SpecificationsLow-Voltage Evaluation Hardware Set Specification Low Voltage Evaluation Hardware Set SpecificationsLow-Voltage Hardware Set Specification Low Voltage Hardware Set Specifications Bldc Motor Control Brushless DC Motor Control TheoryBldc Motor Targeted by This Application 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 StagePower Stage Motor Topology Indirect Back EMF Sensing Stator Winding EquationsSame expressions can also be found for phase a and B Effect of Mutual Inductance Phase Voltage WaveformMutual Inductance Effect Detail of Mutual Inductance Effect Effect of Mutual Phase CapacitanceMutual Capacitance Model 10. Distributed Back-EMF by Unbalanced Capacity Coupling 11. Balanced Capacity Coupling Back-EMF Sensing Circuit Inc Used Control Technique Sensorless Commutation ControlAlignment Starting Back-EMF Acquisition Running Alignment 14. Commutation Control StagesRunning 15. AlignmentFreescale Semiconductor, Inc Commutation time calculation is shown in Figure Running Commutation Time Calculation17. Bldc Commutation Time with Zero Crossing Sensing Service of received back-EMF zero crossingWhere Starting Back-EMF Acquisition Freescale Semiconductor, Inc 18. Vectors of Magnetic Fields 19. Back-EMF at Start Up Starting Commutation Time Calculation Running Commutation Time Calculation, but the followingComputation coefficients are different Application Control Speed ControlPC Master Software PC Master Software Communication Commands Communication with PC Master Software SpecificationsName Type Representing Description Range PC Master Software API VariablesBIT6 Reserved MotorStatusDef, FailureDefBIT2 Reserved SpeedRangeMaxRPM*PerSpeedMAXRange/PerZCrosFltT2 PerSpeedMAXRange and zero crossing period PerZCrosFltT2Freescale Semiconductor, Inc Hardware Design System Configuration and DocumentationMC68HC908MR32 Control Board For High-Voltage Hardware Set cofigurationEVM 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 boardsHigh-Voltage Hardware System Configuration High-Voltage Hardware Set ConfigurationDescribed in MC68HC908MR32 Control Board User’s Manual Motorola document order numberSee References Low-Voltage Evaluation Motor Hardware System Configuration Low-Voltage Evaluation Motor Hardware Set ConfigurationSystem configuration for low-voltage hardware set is shown Low-Voltage Hardware Set ConfigurationLow-Voltage Hardware System Configuration All HW Sets Components References1 MC68HC908MR32 Control Board Electrical characteristics in -1apply to operation at 25C 4shows a block diagram of the board’s circuitryElectrical Characteristics of Control Board 1 3-Phase AC/BLDC High Voltage Power StageHigh-Voltage Hardware Set Components Phase AC High Voltage Power Stage Optoisolation Board Electrical Characteristics of Power StageElectrical Characteristics Electrical Characteristics of the Optoisolation Board3 3-phase Bldc High Voltage Motor with Motor Brake Low-Voltage Evaluation Motor Hardware Set ComponentsEVM Motor Board 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 motorLow-Voltage Hardware Set Components 1 3-Ph AC/BLDC Low Voltage Power StageBlock Diagram Section 2 3-phase Bldc Low Voltage Motor with Motor BrakeSoftware Design Data Flow Main Software Flowchart State DiagramIntroduction Data FlowSoftware Variables and Defined Constants Important system variables are listed in TableSoftware Variables Start/Stop Switch Reading and Start/Stop Decision Sys3DefProcess Measurement Process Back, EMF Zero Crossing Sensing Main Data Flow Part1 Process Fault Control Fault StopFreescale Semiconductor, Inc Main Data Flow Part 2 Alignment, Starting Closed Loop Control System Process Desired Speed SettingProcesses Commutation and Zero Crossing Preset and Set Bldc Speed Control and CalculationProcess Alignment Control Bldc Commutation and Zero Crossing Selection Main Software FlowchartMain Software Flowchart Freescale Semiconductor, Inc Main Software Flowchart Main Software Loop Freescale Semiconductor, Inc Freescale Semiconductor, Inc Software Flowchart Interrupts State DiagramApplication State Transitions Initialize MCU State diagram for this software is shown in FigureInitialize Application Stand-ByFreescale Semiconductor, Inc Stand-by State Align State Starting Commutation Time Calculation Freescale Semiconductor, Inc 10. Back-EMF Acquisition Service of Commutation SetCommutation Time Calculation Service of Received Back-EMF Zero Crossing Running StateExplained in 5.5.5 Back-EMF Acquisition State Over Current 11. Running State Stop State 12. Stop State Fault StateSee Figure Implementation NotesSoftware Files Software files and structure are described in sectionPreset Bldc Commutation and Bemf Zero Crossing Selection Bldc Commutation and Zero Crossing SelectionSet Bldc Commutation and Bemf Zero Crossing Selection Desired Speed Calculation Bldc Speed Control and CalculationPWM Duty Cycle PWMValMax = DUTYPWMMAX*MCPWMMODULUSTimer TimersFunction TIMACh3Int Designer Reference Manual DRM028 Rev 108 Software Design Application Suitability Guide User GuideMinimal Application Speed Motor’s nominal speedMaximal Application Speed Voltage Closed LoopMotor Suitability Mutual Inductance Designer Reference Manual DRM028 Rev 112 User Guide Application Hardware and Software Configuration Hardware ConfigurationHardware setups are shown in -1, -2, Low-Voltage Evaluation Motor Hardware Set Configuration High-Voltage Hardware Set ConfigurationLow-Voltage Hardware Set Configuration Controller Board Settings EVM Board Settings EVM board settings are the same for all hardware platformsSoftware Setup Application HC08 Software Files \bldczerocros08MR32\sources\bldc08.c, main program Application PC Master Software Control Files Software Execution BuildExecute from Evaluation Board Execute from Pre-programmed MCU When the software is built, the S-record fileBldczerocros08mr32MMDS.sx is generated Application ControlPC Master Software Remote Operating Mode Manual Operating ModePC 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 computer11. 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 HardwareVoltage Setting Hardware Customizing Current Setting Hardware CustomizingRange 0,infinity Modified maximal measurable voltage is 55 V, so set Example of Software Customizing to HardwareMaximal and Minimal Voltage Limits Setting Software Customizing to Motor Voltage and Current SettingsDetailed description starts here Range 0,VOLTRANGEMAXRange 0,CURRENTRANGEMAXA Maximal and Minimal Current Limits SettingAlignment Current and Current Regulator Setting Current during alignment state before motor starts ΑRange 0,8 Parameters Tuning with PC Master Software Project File Set constcustx.hFrom Evaluation Board 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 ParametersStart-up Constants and Maximal Commutation Period Start-up Period Maximal commutation period limit ∝sRange -128,127 Constcustx.h Alignment Current and Current Regulator Setting 6.5.4.3Constcustx.h Set #define Percmtstartus in constcustx.h Ensure Percmtstartus =PERCMTMAXUS /2Constcustx.h file #define Speedpiregigain13. PC Master Software Start Parameters Tuning Window Software Customizing to Motor Speed Control Setting Number of commutations per motor revolutionRange 0,255 Maximal speed range rpm Minimal speed of the drive rpmRange 0,SPEEDRANGEMAXRPM Speedminrpm = 0.07 to 0.5SPEEDMAXRPM User Guide 153 Execute from Evaluation Board Set PC master software control mode and start motor see Remote Operating ModeStart motor see Application Control and PC Master Software For the PWM frequency setting, follow the label PWM Frequency and Current Sampling Period SettingPWM frequency setting is provided by PWM FrequencyPWM Frequency Setting PWM period = Periodpwmus = SETPERPWM*2 EQCurrent Sampling Period CANCHANGEPERCURSAMPn in const.h file Conclusion Software Parameters Setting and TuningPERCST1US = Periodpwmus * Setpercs ∝s Current Sampling InstantUser Guide 159 Designer Reference Manual DRM028 Rev 160 User Guide Appendix A. References AN1627, Motorola Motor using MC68HC705MC4 document order numberSG40N Appendix B. GlossaryGlossary 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