Do you know that there exists electric motors everywhere? Intensive testing . in the house, previously car, in the garden mower, in the washing machine, in the cake mixer, food processor, microwave; the list just goes on and on. But have you asked yourself how it works or have you just taken its presence for granted knowing it is there and yet dismissing because part of everyday life?
The fact is, you do not know how it works since have taken its presence for granted so if your little child of 5 asks you ways it works, you wouldn't know what to treatment. Here are a few basics so at least you won't get embarrassed in front of your five year old girl.
An electric motor is in fact about magnets and magnetism. The motor utilizes the magnets for the reasons like creating motion.
Take for example a simple toy magnet. There are two opposites which can attract and repel. So if there is one end which is labelled 'north' and the other 'south,' then the north will attract the south. Its northern border end will repel another north end, and the south end will also repel the other south end. This is the exact principle inside the motor. There are continuous attraction and repelling forces which will create a rotation motion.
The rotor of an electric motor is an electromagnet. Might be made of copper wound in a circle around a soft iron body. The magnetic field is a permanent magnet but there are two semi-circular magnets that are fitted inside the casing of steel.
Larger motors and generators' electromagnets are also the area magnets which are today being used in cars.
Small electric motors
Inside a small motor unit are two small permanent magnets inside of a casing, two brushes that are housed and a winding wire around metal laminations or shafts with winding wire wound on them, this is known as the armature or the windmill.
There are three poles to the rotor leads to it to move significantly. If there are two poles the electromagnet is the balancing point and between the two poles is a field magnet. For three poles the motor can start turning from any steer.
Now, each time the commutator (a switch can reverse the direction in the current between the rotor and the external circuit) changes the direction among the field in a two-pole type motor, it will short out the battery for a little while. This will waste the battery and drain it of its potency. The three poles will fix this problem for it will only shift the direction when the repulsion is at its strongest point.
Now, there are motors with varying number of poles but this really depends on the size of the motor and what it is being used. There are a handful which use very rare but powerful magnets that is boost the power a lot; however, this makes the motor very expensive.
Today, the commutator just isn't as well utilized as electronics are now commonly used which will rid the motor from sparking and constant servicing.
In short, an electric motor utilizes electrical energy to manufacture a mechanical energy with the usage of magnets and magnetic area.