Projects / Electrical / Electrical project 64

Universal Motor Speed Controller with Feedback (Mixer and Drill Type)

Approx. component budget: Rs. 3,000 - 6,000

Objective

Keep the speed steady for a household-type motor and measure speed drop with and without feedback.

What you will build

A triac phase-angle controller with a tacho or back-EMF feedback that keeps the speed steady under varying load for a universal motor.

Results you can expect

• Speed vs load with and without feedback
• Speed regulation percentage
• Input power factor and harmonics
• And motor temperature rise

What you will learn

Triac control, feedback loops and the behaviour of a universal motor.

Tools and notes

Triac, optocoupler zero-cross circuit, Arduino, tachometer or back-EMF sensing, power meter. Mains supply is used, so build in an enclosure with isolation and a fuse.

Resume points from this project

• Built and tested Universal Motor Speed Controller with Feedback (Mixer and Drill Type); objective: keep the speed steady for a household-type motor and measure speed drop with and without feedback.
• Measured and analysed speed vs load with and without feedback and speed regulation percentage; 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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