"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 2

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"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 2

1. 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.

Thinking: When the switch is closed, - the light is on; when the switch is off, - the light is on.

4. Application of electromagnetic relay: The use of electromagnetic relay can realize the work of using low voltage and weak current to control high voltage and strong current; it can also realize remote control and automatic control. Such as: electric bells, automatic water level alarms, anti-theft alarms, etc.

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.

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?

Thinking: Can the iron core in the electromagnet be replaced with a steel core?

3. Solenoid valve controls 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.

electromagnet

1. Definition: A energized solenoid inserted into an iron core is called an electromagnet

2. Working principle: Use the magnetic effect of current to work

3. Factors affecting the strength of magnetism:

(Control Variable)

a. The size of the current

b. Number of turns of coil

c. Whether there is an iron core

4. Advantages:

a. The presence or absence of magnetism can be controlled by turning on or off power;

b. The strength of magnetism can be controlled by changing the size of the current.

c. Magnetic pole transformation can be controlled by changing the direction of current.

5. Application: electromagnetic crane, electric bell, maglev train, electromagnetic relay

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For more information about the PPT courseware "Magnetic Phenomenon Electromagnet and Its Application", please click the Magnetic Phenomenon ppt Electromagnet and Its Application ppt tag.

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 6:

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 6 1. Advantages of Electromagnets 1. The presence or absence of magnetism of electromagnets can be controlled by turning on and off electricity. 2. The magnetic strength of the electromagnet can be controlled by the size of the current. 3. The magnetic poles (south and north pole) of the electromagnet can...

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 5:

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 5 Thinking Review 1. What is the difference between electromagnets and ordinary magnets? 2. How can the presence and strength of the magnetism of the electromagnet be controlled? 3. Why is the core of electromagnet made of soft iron? Instead of steel...

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 4:

"Electromagnets and Their Applications" Magnetic Phenomenon PPT Courseware 4 Apply what you learn 1. The scientist who first discovered the magnetic effect of electric current is: _____. 2. Oersted's experimental explanation: There is a magnetic field around a current-carrying conductor. The direction of the magnetic field and the direction of the current Regarding 3. Magnetic induction of energized solenoid..

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Update Time: 2024-07-26

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