DIY Electric Scooter: Building with an Alternator and Homemade Speed Controller

If you're looking to build a cost-effective and environmentally friendly mode of transportation, an electric scooter powered by an alternator as a brushless DC (BLDC) motor could be the perfect solution. In this article, we'll outline the steps to create your own electric scooter using an alternator and a homemade speed controller.

Step 1: Gather Parts and Tools
The main parts required for this build include an alternator, a speed controller, a drive belt or chain, and a wheel with a sprocket or pulley. You will also need a basic understanding of electrical and mechanical systems in order to assemble and test your scooter.

Step 2: Choose the Right Alternator
The heart of your electric scooter is the alternator, which will act as a BLDC motor. When selecting your alternator, consider factors such as power output, voltage, and ease of mounting. A car alternator can be a suitable option since they are readily available and provide sufficient power.

Step 3: Design the Speed Controller
As the name suggests, the speed controller is responsible for dictating the speed of your scooter. Designing a homemade speed controller can be achieved using a microcontroller, some MOSFETs, and other electronics components. There are many open-source ESC (Electronic Speed Controller) designs available online that can help you build your own.

Step 4: Locate the Three Phase Outputs
To use the alternator as a BLDC motor, find the three-phase outputs within the alternator and connect them to the speed controller. This will allow you to control the motor's speed using the speed controller.

Step 5: Assemble the Scooter
Now that your main components are ready, it's time to assemble the scooter. Attach the alternator to the scooter frameAttach the alternator to the scooter frame, along with the drive belt or chain. Connect the wheel with a sprocket or pulley to the alternator, allowing the motor to generate movement.

Step 6: Connect the Electronics
Carefully connect the speed controller to the alternator and the battery, making sure to follow safety procedures and guidelines for handling electrical components. Once everything is connected, test the scooter to ensure it operates smoothly and safely.

Step 7: Finishing Touches
Add any additional accessories or cosmetic touches to personalize your electric scooter. You can even add features such as lighting or electronic bells to improve safety and visibility.

Building your own electric scooter using an alternator as a BLDC motor and a homemade speed controller is an exciting and rewarding project for those interested in both mechanics and electronics. With the right tools, parts, and knowledge, you can create a sustainable and cost-effective mode of transportation tailored to your specific needs.