# Make an Electromagnetic Motor: Overcome Short-Circuiting

• v_pino
In summary, in order to make an electromagnetic motor, we wrap a coil of wire around a core, which acts as a magnetic circuit. The core is laminated and therefore insulated from the inducing conductor to prevent short-circuiting. This is similar to the way transformers work. The core is not necessary but greatly improves efficiency.
v_pino
In order to make a electromagnetic motor, we wrap a coil of wire around a core. But wouldn't the metal core conduct as well, so we end up short-circuiting the system?

v_pino said:
In order to make a electromagnetic motor, we wrap a coil of wire around a core. But wouldn't the metal core conduct as well, so we end up short-circuiting the system?

They don't actually touch, the core is laminated (i.e. insultated from the inducing conductor). For example, if you look at a transformer drawing, you'll normally see the coils drawn with a slight separation or gap from the core.

Since motors work off of transformer action, you have the same effect in a motor.

http://en.wikipedia.org/wiki/Image:Flux_leakage.svg

Hope that helps.

CS

The wire is insulated.

So what is the purpose of the metal core?

v_pino said:

So what is the purpose of the metal core?

The metal core forms a magnetic circuit directing the magnetic flux to where it is most useful. A core is not required but make things much more efficient.

## 1. What is an electromagnetic motor?

An electromagnetic motor is a type of motor that uses the principles of electromagnetism to convert electrical energy into mechanical energy. It consists of a coil of wire, called an armature, which is surrounded by a permanent magnet. When an electric current is passed through the coil, it creates a magnetic field that interacts with the magnetic field of the permanent magnet, causing the armature to rotate.

## 2. What is short-circuiting in an electromagnetic motor?

Short-circuiting in an electromagnetic motor occurs when the current in the coil flows in a path other than through the armature. This can happen when the wires in the coil touch or when the insulation on the wires wears off, causing the current to bypass the armature and not produce the desired movement.

## 3. How can I overcome short-circuiting in an electromagnetic motor?

One way to overcome short-circuiting in an electromagnetic motor is to use thicker wires with better insulation to prevent the wires from touching. Another method is to use a commutator, which is a mechanical switch that reverses the direction of the current in the coil, ensuring that it always flows through the armature.

## 4. What materials do I need to make an electromagnetic motor?

To make an electromagnetic motor, you will need a coil of wire, a permanent magnet, a battery or power source, and a switch or commutator. You may also need some basic tools, such as pliers and wire cutters, to assemble the motor.

## 5. Are there any safety precautions I should take when making an electromagnetic motor?

Yes, when working with electricity, it is important to take proper safety precautions. Make sure to use a low-voltage power source, such as batteries, and avoid using high-voltage sources. Also, be sure to wear protective gear, such as safety glasses, and work in a well-ventilated area. If you are unsure about any step in the process, seek guidance from a trained professional.

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