Electromagnetic renewals use electromagnets?

Electromagnetic relay (electromagnetic relay) is an industrial control device that uses electromagnets, which uses low-voltage and weak current circuits to indirectly control the opening and closing of high-voltage and high-current circuits; Its working principle and characteristics are briefly explained below, I hope you will learn and master it in depth.

Mechanical composition and circuit composition: electromagnetic relays are generally composed of electromagnets, armatures, spring sheets, contacts, etc., and their working circuits are composed of two parts: low-voltage control circuits and high-voltage working circuits.

Basic use and working principle: In addition to the above-mentioned "weak to control strong", electromagnetic relays can also be used to achieve long-distance control and automatic control. As long as a certain voltage is added to both ends of the ** circle, a certain current will flow through the coil, resulting in an electromagnetic effect, and the armature will overcome the tensile force of the return spring under the action of electromagnetic force attraction and attract to the core, and then the dynamic contact of the armature will be engaged with the static contact (normally open contact).

When the coil is de-energized, the electromagnetic attraction disappears, and the armature returns to its original position under the reaction force of the spring, and the moving contact and the original static contact (normally closed contact) are released. In this way, it is attracted and released, so as to realize the purpose of conduction and cutting off of the controlled circuit.

Relay contact point differentiation: two types of contact points. The static contact that is in the open state when the relay coil is not energized is called the "normally open contact"; Static contacts that are turned on are called "normally closed contacts".

Nonsense is useless, how can you control a large voltage with a small voltage.

Electric fans, induction cookers, washing machines, and sweeping robots use electromagnets.

1. Electric fan:

The motors used in electric fans are usually made of electromagnets. When the current flows in the electromagnet coil, a magnetic liquid field is generated, which drives the motor to rotate.

2. Induction cooker:

Induction cooktops use the magnetic field generated by electromagnets to heat food in pots. When an electric current passes through an electromagnet, it creates a strong magnetic field at the bottom of the pot, which heats up the food inside the pot.

3. Washing machine:

The motor in the washing machine is also made of electromagnets. The rotation of the motor drives the garment bucket to rotate to complete the washing operation.

4. Sweeping robot:

The sensors used in some robot vacuums also work based on the principle of electromagnets. The current in the sensor creates a magnetic field that can be used to detect objects around the robot.

The principle of the electromagnet:

When an iron core is inserted into the acre of energized solenoids, the iron core is magnetized by the magnetic field of the energized solenoids.

The magnetized core also becomes a magnet, so that the magnetism of the solenoid is greatly enhanced due to the superposition of the two magnetic fields on top of each other. In order to make the electromagnet more magnetic, the iron core is usually made hoof-shaped. <>