How DC Motors Works? Working of DC Motors Fully Explained with 3D Animation

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Transcript

00:00This battery-powered drill uses an electric motor to spin a drill bit and drill holes in walls.

00:06Electric motors are crucial in many battery-powered devices.

00:10In this video, we'll explore how these motors work.

00:13To understand electric motors, start with a basic light bulb circuit.

00:17Electricity flows through metallic wires when pushed by voltage from a battery.

00:22When connected, the current flows from the positive to the negative terminal,

00:26lighting up the bulb.

00:28Reversing the battery or switching connections reverses the current direction.

00:32Electricity needs an uninterrupted path to flow.

00:35A break in the circuit stops the flow.

00:38Now, let's look at magnets.

00:40They have north and south poles.

00:42Opposite poles attract, while similar poles repel due to an invisible magnetic field

00:47which can be visualized with magnetic field lines.

00:50Magnets are always on, but electric motors need switchable magnets.

00:55We achieve this with electromagnets.

00:57When current flows through a wire, it creates a magnetic field,

01:01turning the wire into a magnet.

01:04This field's direction can be determined by the right-hand rule.

01:08If your thumb points in the current's direction,

01:10your fingers curl in the magnetic field's direction.

01:14Electric motors use electromagnets because they can be turned on and off.

01:19When a current-carrying wire is placed perpendicular to an external magnetic field,

01:24it experiences a force perpendicular to both the field and current,

01:28known as the motor effect.

01:31This force causes movement.

01:33In a motor, a coil of wire armature rotates within a magnetic field.

01:38The coil is connected to a commutator that reverses current direction each half cycle,

01:43keeping the coil rotating.

01:45This setup ensures continuous motion by using the motor effect.

01:50When the coil reaches vertical, the commutator temporarily breaks the circuit.

01:54The coil keeps moving due to inertia until the brushes reconnect,

01:58reversing the current and maintaining rotation.

02:01Using multiple coils and a segmented commutator improves efficiency and power.

02:06DC motors enhance power by increasing coil numbers and magnetic field strength,

02:11making them vital in technological advancements.

02:14Understanding these principles highlights the electric motor's role in modern devices.

02:19Like and follow for more informative 3D videos.

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