When the motor is powered by DC current, a magnetic field is created within the stator, attracting and repelling the magnets on the rotor. This causes the rotor to start rotating. To keep the rotor rotating, the motor has a commutator.
How does electromagnetism make a motor move?
A simple electric motor can be built using a coil of wire that is free to rotate between two opposite magnetic poles. When an electric current flows through the coil, the coil experiences a force and moves. … The electromagnet is now repelled by the south pole of the permanent magnet, and moves away from it.
What causes an electromagnetic to spin in a motor?
Inside an electric motor, permanent magnets are set onto a ring surrounding a coil of wire. When the appliance’s switch is flicked on, electrons flow through the wire, turning it into an electromagnet. The attractive and repulsive forces of the permanent magnets around it make the electromagnet spin.
What household items have DC motors?
Where can we find DC motor at home? Kitchen appliances like blenders and mixers use electric motors. Most washer and dryer machines use an AC motor to be able to spin in either direction. Small DC motors can be found in DVD or CD players, and the disk drive of a computer.
What factors will affect the rotation of the simple electric motor?
The speed of rotation of the coil can be increased by:
- increasing the size of the current;
- using a stronger magnet;
- increasing the number of turns of wire in the coil;
- reducing friction between the coil and the axel it rotates on.
How can a motor spin fast?
One easy way to make the motor run faster is to add another magnet. Hold a magnet over the top of the motor while it is running. As you move the magnet closer to the spinning coil, one of two things will happen. Either the motor will stop, or it will run faster.
How does a motor create rotation?
A coil of wire carrying a current in a magnetic field experiences a force that tends to make it rotate. This effect can be used to make an electric motor.
How do you rotate a DC motor in both directions?
Of course, the direction of current is controlled by the polarity of the voltage. So in order to change the direction of rotation, we can simply reverse the voltage, causing the current to flow in the opposite direction, changing the force by 180 degrees and the motor to be driven ‘backwards’.