Why the yoke of a DC motor is made of cast iron?

It carries the magnetic field flux.In small generator, yoke are made of cast iron. Cast iron is cheaper in cost but heavier than steel. But for large construction of DC generator, where weight of the machine is concerned, lighter cast steel or rolled steel is preferable for constructing yoke of DC generator.

What is the purpose of yoke in DC generator?

Yoke. The external structure of the DC generator is known as Yoke. It is made of either cast iron or steel. It provides necessary mechanical power for carrying the magnetic-flux given through the poles.

Why is yoke made up of cast steel?

For the same reason the pole core has a wide curved pole shoe to aid in reducing the reluctance of the magnetic path. Lower reluctance means high magnetic permeability of the material. This is why the yoke is made up of hollow steel or cast iron, as both of these have low reluctance and high permeability.

What material is the DC generator stator yoke made of?

cast iron
Yoke: The outer frame of a dc machine is called a yoke. It is made up of cast iron or steel. In small DC machines, it is made up of cast iron and in the case of large DC machines, it is made up of cast steel.

What is the material of yoke?

Materials used for Yoke: It is prepared by using cast iron. For large machines rolled steel, cast steel and silicon steel is used. They provides high permeability.

Why is the length of the yoke made larger?

Why is the length of the yoke made larger? Explanation: The length of the yoke is usually made larger than the pole cores. It is because to cover and protect the field windings.

What is the reason for dc generator fails to build up voltage?

The failure of the build up process of a dc generator is caused by no residual magnetism, reversed field connection and high resistance of field circuit.

What is the material used for the yoke of a DC brush motor?

The magnetic frame or the yoke of DC motor made up of cast iron or steel and forms an integral part of the stator or the static part of the motor. Its main function is to form a protective covering over the sophisticated inner parts of the motor and provide support to the armature.

What is the material used for the yoke of a dc brush motor?

What is the formula for the depth of the yoke?

What is the formula for the depth and height of the yoke for stepped core? Explanation: The depth of the yoke of stepped core is equal to the width of the largest stamping. The height of the yoke for the stepped core is also equal to the width of the largest stamping. 2.

Which loss occurs in the yoke of a dc machine?

209. Which loss occurs in the yoke of a DC machine? (D) no loss.