Tuesday, March 20, 2018

By Karen Murphy


An electric motor refers to an electric device that operates by converting electrical energy into mechanical energy. The reverse process, which involves converting mechanical energy into electrical energy is done by another machine called an electric generator. The two machines have a lot of properties in common. These two machines find a lot of use in the modern society as many processes revolve around them. When in search of electric motors Toronto should be given priority.

The generation of force in these devices depends on magnetic fields interacting in the machine and the winding of currents. Basically, these devices operate on this principle. The reverse application of electrical motors is used in the transport industry under a phenomenon known as regenerative braking. It involves conversion of mechanical power into electricity which in turn stops the locomotive.

This device has many independent parts working together to create a system which achieves the needed effect. Some of the parts include air gap, windings, stator, commutators, bearings, and rotor. The moving part is known as the rotor. It turns the shaft and thereby delivering mechanical power. A rotor has conductors which convey current to the magnetic fields of the stator resulting into generation of power that turns the shaft.

Depending on the design the stators can have permanent conductors while the rotors are designed with permanent magnets. An axis in normally included so that the shaft can rotate around it. Bearings are included to ensure the rotor is permanently held in its position and that it rotates within its axis. The shaft extends to the outside through the bearings.

Stators make the stationary components of the electromagnetic circuit of the machine. They may be made of permanent magnets or windings. The core of the stator is composed of several sheets of thin metals, which are called laminations. The purpose of the laminations is to reduce losses of energy, which would otherwise occur if solid cores were used instead.

In every motor some distance is allowed between the stator and rotor. The included air gaps are very tiny. Air gaps are made small as possible to avoid the negative impact caused on the motor by large air gaps. Interestingly, air gaps account for the low power factor of electric motors. As such, the issue of air gaps is a very important aspect in the design of motors.

Wires which are laid in coils in these devices are known as windings. In most cases, these wires are wrapped around laminated magnetic cores. This was they can form magnetic poles when electricity passes through them. Magnetic pole configurations known are of two types. The major two magnetic pole configurations are the nonsalient-pole machine and the salient-pole machine. The various motor producers have their own preferences when it comes to using magnetic pole configuration.

These machines have several applications in commercial, industrial and household appliances. They are included in the designs of appliances like industrial fans, power tools, pumps and blowers, machine tools, household appliances, and disk drivers. They can be connected to AC and DC sources. Internal construction, electric power source type and application among other aspects can be used in classification of these devices.




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