The stator core of an induction motor is made of silicon steel laminations.

The stator is the stationary part of an induction motor, and it consists of a core made of laminated steel sheets stacked together. These laminations are made of silicon steel, also known as electrical steel or transformer steel.

Silicon steel is a type of steel that is specifically designed for use in electrical applications. It is made by adding silicon to low carbon steel. The addition of silicon to the steel improves its magnetic properties, making it ideal for use in electrical components such as transformers and motors.

The stator core is made up of laminations rather than a solid piece of steel for several reasons:

1. Reduced Eddy Currents: Eddy currents are circulating currents that are induced in the core material due to the changing magnetic field. These currents can cause energy losses and heating in the core. By using laminations, the eddy currents are minimized as the laminations are insulated from each other, reducing the energy losses and improving the efficiency of the motor.

2. Reduced Hysteresis Losses: Hysteresis losses occur when the magnetic domains in the core material continuously change their alignment with the magnetic field. This causes the material to heat up. Using laminations reduces hysteresis losses as the magnetic domains within each lamination can align more easily with the changing magnetic field, reducing energy losses and heat buildup.

3. Improved Magnetic Flux: The laminations are stacked together to form a solid core, but with gaps between each lamination. These gaps help to improve the magnetic flux distribution within the core, ensuring that the magnetic field is evenly distributed and provides efficient operation of the motor.

4. Easy Assembly and Maintenance: Laminated cores are easier to assemble and disassemble compared to solid cores. This makes it convenient for manufacturing, maintenance, and repairs of the motor.

In conclusion, the stator core of an induction motor is made of silicon steel laminations due to their ability to reduce eddy currents, hysteresis losses, improve magnetic flux distribution, and provide ease of assembly and maintenance.