Electric Bobby Car Hoverboard Upgrade

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This project puts two pairs of hoverboard motors in a Bobby Car toy vehicle, to give it 4x4 traction and a top speed of 29km/h with turbo activated.

Specifications

  • Project start: January 2019
  • Main controller: STM32F103 72MHz ARM Cortex-M3 core
  • Motors: 4x direct drive 3-phase brushless DC electric wheel hub motors, 36V 350W ea
  • Tire type: non-pneumatic rubber tire, road pattern
  • Tire size: 7-inch / 170 mm
  • Battery: Lithium-ion rechargeable 18650-cells, 10S2P 36V 4400mAh 158.4Wh pack with XT60 connector
    • Upgrade: Controller can handle 13S (48V), 12S battery upgrade easiest
  • Charger: Lithium-ion charger 42V 2A 3-pin connector with built-in fan
    • Upgrade: External charger for anything else
  • Internal connectors: JST Sales America B4B-XH-A(LF)(SN) 2.5mm pitch

Inspiration