"Magical Little Motor" Energy PPT Download

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"Magical Little Motor" Energy PPT Download

Part One Content: New Lesson Learning

Why is the rotor constructed like this?

When power is supplied to the coil from the commutator, you can see that the rotor core can pick up the pins, and the rotor is three electromagnets.

Guess: What route does the current flow through the coil?

How small electric motors work

The purpose of the commutator is to switch on the current and change the direction of the current.

During the rotation of the small motor, the brushes contact the three metal rings of the commutator in sequence, and the direction of the current passing through the rotor coil will automatically change.

The secret of small electric motor rotation

guess:

1. Why does the small motor rotate?

2. The small motor is the result of the joint action of various parts. How are these three parts put together?

3. The rotation of the rotor is definitely related to the action of force. How will the magnets on the housing interact with the rotor electromagnets?

What we found:

Applying electricity to an energized coil will produce magnetism; then put a magnet close to the rotor, and the rotor will rotate.

Magnets and electromagnets attract or repel each other.

Magical little motor PPT, part 2: expansion and extension

The electric motor uses the principle of magnetic effect of current. The electric motor is divided into DC motor and AC motor according to the different power sources used.

There are many types of electric motors. Generally, the selection of lubricant for electric motors depends on the bearing type, rotation speed, temperature, load, etc.

Summary

An electric motor is a machine that uses electricity to generate power. Although the sizes are very different and the uses are different, the basic working principle is the same: using electricity to generate magnetism, and using the interaction of magnetism to rotate.

Magical little motor PPT, part 3: Classroom exercises

1. Fill in the blanks

1. The rotor is actually ( ).

2. The interaction between magnet and electromagnet drives ( ).

3. The function of the small motor commutator is ( ).

4. The "V" shaped fork plays the role of ( ).

5. There is ( ) on the motor casing.

2. Judgment questions

1. An electric motor is a machine that uses electricity to generate magnetism and uses the interaction of magnetism to rotate. ( )

2. The rotor is equivalent to an electromagnet. ( )

3. The rotation direction of the small motor is related to increasing the number of winding turns of the coil. ( )

Magical little electric motor PPT, Part 4: Homework

After returning home, check the information and explain where the electric motor is used?

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"Magical Little Motor" Energy PPT Courseware 4:

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Update Time: 2024-10-04

This template belongs to science courseware Science Edition for Sixth Grade Science Volume 1 industry PPT template

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