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THE ELECTRIC BICYCLE PROJECT INCLUDING AN INVESTIGATION OF HUMAN CYCLING PERFORMANCE

THE ELECTRIC BICYCLE PROJECT INCLUDING AN INVESTIGATION OF HUMAN CYCLING PERFORMANCE. S. I. Brand, N. Ertugrul and W.L. Soong University of Adelaide School of Electrical and Electronic Engineering Adelaide, Australia. INTRODUCTION. BENEFITS OF ELECTRIC BICYCLES CLEAN QUIET EFFICIENT

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THE ELECTRIC BICYCLE PROJECT INCLUDING AN INVESTIGATION OF HUMAN CYCLING PERFORMANCE

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  1. THE ELECTRIC BICYCLE PROJECT INCLUDING AN INVESTIGATION OF HUMAN CYCLING PERFORMANCE S. I. Brand, N. Ertugrul and W.L. Soong University of Adelaide School of Electrical and Electronic Engineering Adelaide, Australia

  2. INTRODUCTION • BENEFITS OF ELECTRIC BICYCLES • CLEAN • QUIET • EFFICIENT • ECONOMICAL • REDUCED TRAFFIC CONGESTION PROJECT SCOPE • DETERMINE HUMAN POWER FROM • Stationary Tests and Mobile Tests • DESIGN AND BUILD CUSTOM HUB • INVESTIGATE BATTERY OPTIONS • DEVELOP CONTROL SYSTEM

  3. HOW MUCH POWER? A Horsepower = 746 Watts How much is a “Human Power”? CYCLING POWER DATA • ATHLETE TIME TRIALS (A.I.S.) • STATIONARY DYNAMOMETER TESTS • MOBILE CYCLING TESTS

  4. BICYCLE DYNAMOMETER

  5. MEASURED PARAMETERS • DYNAMOMETER • WHEEL SPEED • PEDALLING TORQUE • OUTPUT CURRENT • OUTPUT VOLTAGE • MOBILE DATA LOGGING SYSTEM • WHEEL SPEED • PEDALLING TORQUE • GEAR RATIO

  6. DATA LOGGING SYSTEMS • STATIONARY TESTING • LABVIEW SOFTWARE • DESKTOP COMPUTER • DAQ CARD • MOBILE TESTING • VISUAL DESIGNER SOFTWARE • DATA SAMPLING HARDWARE • LAPTOP COMPUTER

  7. PEAK CYCLIST POWER SUSTAINED CYCLING POWER

  8. MOBILE DATA RESULTS MOTOR POWER

  9. HORSE AND HUMAN POWER COMPARISON BICYCLE POWER REQUIREMENTS • 450 WATTS PEAK • 200 WATTS CONTINUOUS

  10. 160 WATT-HOURS WILL PROVIDE • 25 MINUTE POWERED RANGE • 50 MINUTE PEDAL ASSIST RANGE BATTERY ENERGY DENSITY

  11. WASHING MACHINE MOTOR WOODEN MOCK-UP MACHINING ALUMINIUM FRONT WHEEL MOTOR DEVELOPMENT

  12. MOTOR EFFICIENCY BRUSHLESS MOTOR - DC MOTOR DYNAMOMETER

  13. CONTROL SYSTEM 3-PHASE BRIDGE INVERTER BOARD

  14. MICROCONTROLLER and PROGRAMMING • MICROCHIP PIC16F877 • 14 BIT CORE • 20MHz • 33 INPUT/OUTPUT PINS • 8 ANALOG INPUTS • MICROCHIP RESOURCES • PIC MICROCONTROLLERS • MPLAB SOFTWARE • PRODUCT DATA SHEETS • APPLICATION NOTES • C – COMPILER • CHIP PROGRAMMER

  15. MOTOR WAVEFORMS • 100% PWM 40% PWM

  16. CONCLUSIONS and FUTURE WORK • DIRECT DRIVE HUB MOTOR • EFFICIENT (84%) AND LOW MAINTENANCE • BICYCLE POWER REQUIREMENTS • 200 WATT CONTINUOUS, 450 WATT PEAK • BATTERY CAPACITY • 160 WATT-HOUR • USER INTERFACE • LCD DISPLAY and KEYPAD • INPUT - CUSTOMISED RIDER SETTINGS • OUTPUT - SPEED, DISTANCE AND BATTERY STATE • CUSTOM BUILT MOTOR • RARE EARTH MAGNET ROTOR • INCREASE EFFICIENCY • REDUCED WIEGHT

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