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Powertrain

Motor

We use a Brushless DC (BLDC) motor from Kunray (model MY1020, 72V 3000W), along with its supplied controller.
The motivation for selecting an electric motor over a combustion engine is discussed in the FAQ.

Motor Specifications

  • Type: High-speed BLDC motor (Brushless DC)
  • Model: Kunray MY1020
  • Nominal voltage: 48VDC (?)
  • Nominal power: 2000W–2500W (?)
  • Nominal current: (?)
  • Rated speed: (?)
  • Max speed: (?)
  • Max torque: (?)
  • Material: Aluminum housing, full copper winding
  • Weight: ~8 kg
  • Dimensions: ~16.9 cm length x 9.6 cm height
  • Shaft: 10mm diameter, no keyway (non-standard)
  • Product link (Amazon): Kunray 72V 3000W Motor Kit

Note: For transmission system details (chain, sprockets), see Transmission

Controller Specifications

  • Input voltage: 48V (?)
  • Max current: (?)
  • Max supported power: (?)
  • MOSFETs: (?)
  • Phase angle: (?)
  • Undervoltage protection: (?)
  • Built-in features:
  • Reverse mode
  • PWM speed control
  • Three speed modes (low/medium/high)
  • High/low-level braking input
  • Hall sensor support
  • Sensorless mode supported
  • Ignition lock (anti-theft)
  • Cruise control
  • Soft start
  • Twist-grip throttle control
  • Product link (AliExpress): Kunray BLDC Controller 72V

Throttle Pedal Sensor

The throttle pedal sensor has the following wire assignments:

  • Red: Vcc
  • Yellow: Ground
  • Green/Blue: Signal

The twist-grip throttle that comes with the motor kit also includes:

  • Voltage range: 12V–72V
  • Functions: Throttle signal, 3-speed selector, reverse mode
  • Cable length: ~1.5 m
  • Material: Rubber + ABS

Assembly

This section will include real photos of the kart assembly taken from OwnCloud.

Important: During the first installation, the red steering part was mounted in the wrong orientation. Refer to these pictures to ensure correct assembly in future setups.

(Insert images here once available)

To be added:

  • Full wiring table (cable color, pin name, voltage, function)
  • Integration with control system (e.g., microcontroller / bluepill)
  • DAC details (used to convert PWM signal if applicable)