What are three things needed in an electric motor?
The three things you need to make a motor are 1) a rotating part, called a rotor, with magnets that have alternating polarity; 2) one or more electromagnets; and 3) a commutator that switches the direction of current in the electromagnets back and forth in the correct sequence to keep the rotor spinning.
What equipment is used in electric motors?
The electronic devices such as water pumps, fans, refrigerators, mixer grinders and other appliances use electric motors to function. Electric motor uses the electric energy to rotate a metal strip by using the magnetic properties of flowing alternating current.
What two things do electric motors need to work?
Electrically, a motor consists of two components which move relative to each other and which together form a magnetic circuit:
- Field magnets – This part creates a magnetic field which passes through the armature. …
- Armature – This is the part through which the electric current flows which develops the force.
What materials are motors made of?
So, what are these motor component materials made from? Powder metal components for motors generally consist of iron, nickel, and cobalt. Iron is the cheapest of the three, so many designers turn there first. Cobalt is rarely used on its own, but is sometimes added to iron.
What are the 7 parts of electric motor?
Different Parts of an Electric Motor and Their Function
- A power supply – mostly DC for a simple motor.
- Field Magnet – could be a permanent magnet or an electromagnet.
- An Armature or rotor.
What devices use motors?
The electric washing machine, invented Alva J. Fisher in 1906, is a common home appliance that makes use of an electric motor. Other home appliances that use electric motors include clothes dryers, vacuum cleaners, fans, air conditioners, refrigerators and freezers.
What device reverses current?
The direction of the current is reversed by a commutator in the coil of a motor. The commutator is like a rotatory electrical switch.
What is an electric motor Class 10?
Electric motor is a device that converts electrical energy to mechanical energy. Parts of a Electric Motor. Insulated Copper wire: A rectangular coil of wire ABCD. Magnet Poles: A magnet as placed above ie North Pole and South Pole.
What do brushes do in a motor?
Carbon brushes, or electric motor brushes, play an important role in motors and generators, serving as electrical conductors. This is achieved by passing electrical current between the motor’s stationary and rotating wires. A carbon brush may have one or more carbon blocks and one or more shunts or terminals.
How does a homemade electric motor work?
This simple electric motor works by the magnetic force F = IL x B. The current goes around the coil so that it points one direction in one end of the loop and in the other direction at the other end of the loop. The magnetic field at both of these spots points in the same direction.
Do electric motors have horsepower?
An electric motor’s output is measured in kilowatts. Companies that build electric cars continue to talk about horsepower because consumers are still more familiar with that type of unit. The equation is as simple as hp = kW x 1.369, so a 100-kW motor produces 136 horsepower.
What is a good electric motor?
An electric motor is an electromechanical device that converts electrical energy into mechanical energy. Most often, the movement is rotary, with mechanical energy characterized by rotational speed and motor torque. This buying guide will only cover this type of motor.