"Electromagnet" PPT courseware

Description

"Electromagnet" PPT courseware

Electromagnetic relay

1. Structure: Electromagnetic relay is composed of electromagnet, armature, spring, static contact, moving contact, etc.

2. Principle: Electromagnetic relays work by utilizing the magnetic effect of current.

3. The essence of an electromagnetic relay is a switch that uses electromagnets to control the on and off of the working circuit.

Let me analyze

When the switch is closed, the circuit is connected, the electromagnet has current, and the armature is attracted, and the small hammer at the lower end of the spring leaf strikes the bell. When the armature is attracted, it separates from the tip of the screw, the circuit is disconnected, the electromagnet loses its magnetism, and the spring leaf bounces back. As soon as the armature touches the screw, the circuit is connected again, and the armature is attracted again. The small hammer Knock again. As long as the switch is closed, the current circulates on and off, and the bell keeps ringing.

Solenoid valve door

1. Structure: The solenoid valve is composed of a valve body, a slide valve, an armature, an electromagnetic coil, etc.

2. Working principle: The solenoid valve door realizes the presence or absence of magnetism by changing the current on and off in the coil. The movement of the electromagnet drives the slide valve to move, completing the closing and opening of the door.

3. Other applications of solenoid valves: solenoid valves for gas water heaters, inlet and drainage systems of fully automatic washing machines, etc.

maglev train

1. Working principle of maglev train: Maglev train mainly relies on the action of magnetic field to achieve support, guidance, traction and braking functions. When the train is running, the electromagnet on the train interacts with the magnetic field generated by the track coil, causing the train to receive a large upward force, and the train will float above the track. This reduces the friction in train operation and greatly increases the speed of the train.

2. Advantages of maglev trains: high speed, comfort, no noise, no pollution, and low energy consumption.

I'll choose

Among the following examples, electromagnets are not used ( )

A.Generator B.Electric motor

C. Electric bell D. Electric water heater

How flood control alarms work

Thinking: When the water level exceeds the warning line, how is the control circuit turned on, and how is the alarm circuit turned on and alarmed?

How the thermostat works

Think: How does an incubator work?

burglar alarm

Thinking: When someone steps on the pedal, how does the alarm sound?

Keywords: electromagnet teaching courseware, E-education version third grade science PPT courseware download for the second volume, third grade science slide courseware download, electromagnet PPT courseware download, .PPT format;

For more information about the "Electromagnet" PPT courseware, please click the Electromagnet PPT tab.

"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT:

"Electromagnet Electromagnetic Relay" Electricity and Magnetism PPT Part One Content: Knowledge Management 1. Electromagnet composition: It is a solenoid with an iron core, which is composed of a coil and an iron core. There is an iron core in the electromagnet to enhance the magnetism of the electromagnet. Strong magnetism..

"Magnetic Force of Electromagnets (2)" Energy PPT Download:

"Magnetic Force of Electromagnets (2)" Energy PPT Download Part One: Review Introduction An electromagnet is a device composed of a coil and an iron core. The magnetic force of the electromagnet is related to the number of coil turns: the greater the number of coil turns, the greater the magnetic force, and the smaller the number of coil turns..

"Magnetic Force of Electromagnets (2)" Energy PPT:

"Magnetic Force of Electromagnets (2)" Energy PPT Part One Content: The group tests the selected hypothesis and formulates a group research plan. What are the factors we want to examine (i.e. the conditions that need to be changed)? How to change this condition? For the sake of fairness in the experiment, it should be controlled...

File Info

Update Time: 2024-10-19

This template belongs to science courseware E-education edition third grade science volume 2 industry PPT template

Preview