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Demo Kit of Electronic Bicycle - PowerPoint PPT Presentation


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Demo Kit of Electronic Bicycle. The Requirement. b. b. Bicycles are used for leisure, sports, tournaments. Bicycle is also used as a kind of transportation tool. As a transportation tool; the need of saving human energy arises. Meanwhile, the need of electronic bicycle arises. b. b.

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Presentation Transcript
the requirement
The Requirement

b

b

  • Bicycles are used for leisure,sports, tournaments.
  • Bicycle is also used as a kind of transportation tool.
  • As a transportation tool; the need of saving human energy arises. Meanwhile, the need of electronic bicycle arises

b

b

slide3
It is a bicycle with a DC motor and a rechargeable battery
  • It is not a motorcycle, so some limitations are applied
    • Speed, weight, loading
  • It is a tool, the safetyis significant.
slide4

Block diagram

Front Panel

Throttle

MCU

ST7LiteX

‘1+1’Assistant

VCC

36VDC

Cruise

Voltage monitor

PWM

Brake

TD221

Current

MOS

Battery

Array

20kHz

Relay

why use st7litex mcu
Why use ST7liteX MCU?
  • Quick and accurate compute.
  • Easy to upgrade and add new functions
  • Compatible with different sensors and requirements
  • Close loop control
  • Cheaper price & high quality performance
features of demo kit
Features of demo kit
  • Adjustable speed steplessly
    • Throttle

Holler sensor

input : 5V output : 1.2V ~ 4.7V

  • Cruise. Run the bicycle in a preferred speed.
    • No need to grasp throttle
  • Speed detection & display.
    • Holler sensor

x pulses in a cycle

slide7

Rider force

Rider force and electric power as one, push the rider and vehicle into operation

Intelligent sensor

+

controller

Electric power

motor

  • '1+1' assistant. The machine provides the same power as the rider does.
    • Need a torque/speed sensor for close loop control
slide8

k, ∫ dx, dy/dx

PID control

Speed sensor

PWM control

Torque sensor

  • Voltage low detection & warning.
  • Over current detection & protection.

Close loop

for better

performance

slide9

speed

Restore time

t

Brake or motor jam,etc

  • Run away protection. Cut off the motor power in case of uncontrolled situation, and restore the speed in a safe slow process.
schedule
Schedule
  • DEC,2003 Prototype SCH/PCB completes.
  • DEC,2003 Basic software coding complete.
  • JAN,2004 Hardware & software debug.
  • FEB,2004 Open loop debug completes.
  • Testing of full set will be made.