Projects / Electrical / Electrical project 70

Linear Induction Motor Demonstrator

Approx. component budget: Rs. 4,000 - 8,000

Objective

Show how a rotating motor principle can be unrolled into straight-line motion and measure thrust.

What you will build

A flat linear stator with three-phase windings that moves an aluminium or copper plate along a track, driven from a 3-phase low-voltage supply.

Results you can expect

• Thrust vs supply voltage and frequency
• Speed vs slip
• Air-gap effect
• And efficiency compared with a rotating motor

What you will learn

Travelling magnetic fields, linear motors (as used in maglev and rail launches) and thrust measurement.

Tools and notes

Laminated core and winding or a rewound stator, 3-phase source from VFD, spring balance, aluminium plate. Keep the voltage low and cover all live terminals.

Resume points from this project

• Built and tested Linear Induction Motor Demonstrator; objective: show how a rotating motor principle can be unrolled into straight-line motion and measure thrust.
• Measured and analysed thrust vs supply voltage and frequency and speed vs slip; 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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