Projects / Electrical / Electrical project 6

BLDC Motor Speed Controller with Hall-Sensor Commutation

Approx. component budget: Rs. 6,000 - 11,000

Objective

Build a BLDC controller and compare its speed regulation, efficiency and torque-speed behaviour with a brushed DC motor drive.

What you will build

A small BLDC motor, a three-phase MOSFET bridge with drivers, a microcontroller reading the Hall sensors, a speed potentiometer and current sensing.

Results you can expect

• Speed vs throttle
• Torque-speed curve
• Efficiency at different loads
• Current limit response
• Comparison with a brushed motor

What you will learn

Electronic commutation, three-phase bridges and motor control, central to EVs, drones and fans.

Tools and notes

Arduino/STM32, MOSFET driver ICs, tachometer, Excel. Use a current limit and a fuse, and keep fingers away from the rotating shaft.

Resume points from this project

• Built and tested BLDC Motor Speed Controller with Hall-Sensor Commutation; objective: build a BLDC controller and compare its speed regulation, efficiency and torque-speed behaviour with a brushed DC motor drive.
• Measured and analysed speed vs throttle and torque-speed curve; wrote the report and presented the results in a viva. Add your own numbers: [x].

Replace [x] with your own measured results. Write only what you really did.

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