Created Wheels (markdown)

Wheels.md

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+# Hoverboard Wheels
+Hoverboard wheels come in different sizes(4.5",6.5",8",8.5",10"), different printing, with tube or tubeless.<br>
+All have been successfully used with this firmware as the wheel share this same characteristics:
+- same motor winding
+- 30 pole pairs
+- Wye/star wiring
+
+<img src="https://github.com/EFeru/hoverboard-firmware-hack-FOC/blob/master/docs/pictures/motor_winding.png" width="700"><br>
+
+Unfortunately the quality of the wheel might differ, over the years the inner design has been modified to cut down costs:
+- smaller stators
+- less coil wires
+
+# Using the firmware with other wheels
+The firmware might work with different type of Motor/Wheels.<br>
+Phases/hall sensor wires might have to be swapped.<br>
+You might have to update the number of [pole pairs parameter](https://github.com/EFeru/bldc-motor-control-FOC#parameters) in the FOC model for accurate  RPM/Speed measurement.
+
+# Wiring from Star to Delta
+Hoverboard wheels can be rewired from Star to Delta to trade Torque for Speed.<br>
+It should work with the firmware (to be confirmed), but will introduce a 30° phase shift, so the wheel will spin faster in one direction, which shouldn't be a problem for Scooter or Bike projects.<br>
+For Kart projects, as the wheels spin in opposite direction, you might need to swap phases so that the wheels spin fast in the right direction, knowing that reverse will be slower.
+I won't explain here how to rewire as there is already a lot of content online.
+
+# Links
+Here are a few interesting builds with hoverboard wheels, you will find many more on Youtube !!!
+* [Mounting bigger tires on a 6.5" wheel](https://www.youtube.com/watch?v=oUuCi9lp9IE)
+* [Extending the shaft on a 6.5" wheel](https://www.youtube.com/watch?v=aJ_qoiFvPzs)
+* [Mounting a disk brake on a 6.5" wheel](https://www.youtube.com/watch?v=GWQx6ymAfUk)
+* [Omniwheel](https://www.youtube.com/watch?v=QXF6hNVUydI)
+