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Transcript of ELECTRIC DRIVETRAIN & PERIPHERIALS · PDF file ELECTRIC DRIVETRAIN & PERIPHERIALS...

  • ELECTRIC DRIVETRAIN & PERIPHERIALS

    BATTERY & BATTERY MANAGEMENT

    SYSTEM 48 lithium ion Samsung INR18650 cells. The cells are

    connected 4 in parallel 12 in series giving a battery

    output of 43.2V and 4.32 Ahr.

    Orion BMS Jr. equipped with cell over-voltage, under-

    voltage, over-current, and over-temperature protection.

    It also actively balances cells when charging.

    POWER DISTRIBUTION

    SYSTEM The vehicle power distribution delivers energy to the system

    components only when instructed and safe to do so. Each

    individual component of the power system is fused for

    overload and short circuit protection.

    VEHICLE COMMUNCATION Communication between modules allow data transfer.

    This allows for real time feedback from motor controller

    and BMS to be displayed on the steering mounted

    OLED screen. Micro SD data logging at rear of

    vehicle with benefits of optimising both

    driver and vehicle efficiency.

    VEHICLE GEARBOX Power transfer between motor and wheel

    requires a 12:1 reduction. The motor,

    which spins up to 6000 rpm must give a

    peak torque of 30 Nm at the wheel. Two

    stages of roller chain reduction are used

    for an efficient, compact drive system.

    SYSTEM PERIHEPRALS Several electrical peripherals are required to meet competition technical inspection and

    to emulate current on-road vehicles.

     Full lighting system including headlights, indicators, and brake lights.

     Functioning windscreen wiper system.

     High tone car horn.

    The switching of these functions are positioned on a quick release steering wheel along

    with the dead-man switch and emergency stop.

    PROJECT OUTLINE: The Shell Eco-marathon challenges young engineers from around

    the world to design, build, and drive energy-efficient vehicles. Our

    vehicle will compete at the Shell Eco-Marathon in March 2017.

    MOTOR CONTROLLER For efficient electric propulsion, a Brushless DC

    motor from Scorpion Power Systems was

    selected. Features of the motor controller

    include:

     Texas Instruments InstaSPIN-FOC

     Texas Instruments TMS320F28027F 32-bit

    microcontroller

     I2C communication

     Very low Rds(ON) MOSFETS (