# How does electromagnetism produce the rotation of a DC motor?

Contents

The armature is connected to a DC power source through a pair of commutator rings. When the current flows through the coil an electromagnetic force is induced on it according to the Lorentz law, so the coil will start to rotate.

## How does electromagnetism make a motor move?

An electric motor converts electrical energy into physical movement. Electric motors generate magnetic fields with electric current through a coil. The magnetic field then causes a force with a magnet that causes movement or spinning that runs the motor.

## What causes DC motors to rotate?

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. … This way the rotor can keep spinning.

## Do DC motors use electromagnetism?

A simple direct current (DC) motor is illustrated below. … The armature, carrying current provided by the battery, is an electromagnet, because a current-carrying wire generates a magnetic field; invisible magnetic field lines are circulating all around the wire of the armature.

## How do you rotate a DC motor?

Your DC motor can be configured to turn in either direction by simply inverting the polarity of the applied voltage. The change in the flow of current switches the direction of the spinning force, causing the motor’s shaft to begin turning in the opposite direction.

## How does electricity power a motor?

Electric motors work by converting electrical energy to mechanical energy in order to create motion. Force is generated within the motor through the interaction between a magnetic field and winding alternating (AC) or direct (DC) current. … Electric Motors have an array of applications.

## How can electricity be used to produce motion?

How can electricity be used to produce motion? It can be used to produce motion when a current flows through the wire, the current is reversed, the magnetic force pulls the wire up. … An electric motor used and electric current to produce motion. A generator uses motion to produce an electric current.

## How do motors rotate?

Electric motors use magnets to convert electricity into motion. … The attractive and repulsive forces of the permanent magnets around it make the electromagnet spin. This circular motion is then used to power anything from a fan to an electric car.

## What is the rotating part of DC machine?

A rotor is the rotating part of the DC machine that brings about the mechanical rotations.

## How do DC motors control speed?

Thus, the speed of a DC motor can be controlled in three ways:

1. By varying the supply voltage.
2. By varying the flux, and by varying the current through the field winding.
3. By varying the armature voltage, and by varying the armature resistance.
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## Which of the following rule is used to determine the direction of rotation of DC motor?

DC Generators use Fleming’s right-hand rule to find the direction, not use Fleming’s left-hand rule.

## How is torque produced in a DC motor?

When a DC machine is loaded either as a motor or as a generator, the rotor conductors carry current. These conductors lie in the magnetic field of the air gap. Thus each conductor experiences a force. … Hence torque is produced at the circumference of the rotor and rotor starts rotating.

## Does the DC motor rely on permanent magnets or electromagnets?

The most basic form of an electric motor is a brushed direct current (DC) motor that uses a free to rotate rotor made of a current carrying conductor (simply a piece of wire bent into a rectangular loop) and static permanent magnets as the stator.

## How does a DC motor spin in reverse Arduino?

To control the direction of the motor, the pins in1 and in2 must be set to opposite values. If in1 is HIGH and in2 is LOW, the motor will spin one way, if on the other hand in1 is LOW and in2 HIGH then the motor will spin in the opposite direction.

## How do you rotate a DC motor in both directions using Arduino?

Arduino Code

Attach IN2 of the IC to pin 9 of Arduino. Link EN A of IC to pin 2 of Arduino. Attach SENS A pin of IC to the ground. The motor will run in the clockwise direction for the first 3 seconds and then anti-clockwise for the next 3 seconds.

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