"Why Generators Can Generate Electricity" PPT Courseware on Electric Motors and Generators 4

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"Why Generators Can Generate Electricity" PPT Courseware on Electric Motors and Generators 4

Explore the principles of motor rotation

The effect of magnetic field on current: A current-carrying conductor will be acted upon by a force in a magnetic field, and the direction of the force is related to ____________ and _________.

The function of the commutator: every time the coil rotates through the equilibrium position, it automatically changes the ___________ in the coil.

The working principle of the electric motor: the principle that the energized coil is forced to rotate in the magnetic field.

Application of the principle of action of magnetic field on energized conductors

1. Magnetoelectric current meter;

2. Dynamic loudspeaker (speaker).

Get to know generators

Use wires to connect the battery, small light bulb, ammeter, and switch to form a closed circuit.

Connect a hand-operated generator and a small light bulb to the circuit. Turn the handle to make the coil rotate in the magnetic field, and the small light bulb will glow, indicating that there is current flowing through the small light bulb in the circuit.

What are the main components of a generator?

Composed of two main components: magnets and coils

A current-carrying conductor experiences a force in a magnetic field

Will electricity be generated when a conductor subjected to a force moves in a magnetic field?

Analysis and Demonstration

Conclusion: When a part of a conductor in a closed circuit moves in a magnetic field to cut the magnetic field lines, a current will be generated in the conductor. This phenomenon is called electromagnetic induction.

The current generated in the phenomenon of electromagnetic induction is called induced current

The direction of the induced current is related to the direction of movement of the conductor's cutting magnetic field lines and the direction of the magnetic field.

Transformation of energy in the phenomenon of electromagnetic induction:

Conversion of mechanical energy into electrical energy

The main application of the phenomenon of electromagnetic induction is in generators

dynamo

Principle: Electromagnetic induction phenomenon

Composition: magnet, coil

Practical alternator

The actual alternator has a relatively complex structure, but it is mainly composed of two parts: a rotor (rotating part) and a stator (fixed part). The rotor is driven by a water turbine, steam turbine or internal combustion engine.

Large generators emit very high voltages and strong currents, and generate electricity by keeping the coils stationary and the magnetic poles rotating. This type of generator is called a rotating magnetic pole generator.

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For more information about the PPT courseware "Motors and Generators: Why Generators Can Generate Power", please click the "Motors and Generators ppt Why Generators Can Generate Power" ppt tag.

"Why Generators Can Generate Electricity" PPT Courseware on Electric Motors and Generators 3:

"Why Generators Can Generate Electricity" PPT Courseware of Electric Motors and Generators 3 Review Review If the + pole of the power supply is connected to the wire, the observable phenomenon is ___________, and when the circuit is disconnected, _______________ can be observed. 1. Understand the generator Activity 2: Disassemble the generator...

"Why Generators Can Generate Electricity" PPT Courseware on Electric Motors and Generators 2:

"Why Generators Can Generate Electricity" PPT Courseware on Electric Motors and Generators 2 Understanding Generators Carefully observe the hand-operated generators shown in the picture below. What are the main components inside them? Compare the structures of generators and electric motors and see what similarities they have. Generator main...

"Why Generators Can Generate Electricity" PPT courseware on electric motors and generators:

"Why Generators Can Generate Power" PPT courseware on electric motors and generators. Understand the generator. Use wires to connect the battery, small light bulb, ammeter, and switch into a closed circuit. Connect the hand-cranked generator and small light bulb to the circuit. Turn the handle to make the coil in the magnetic field. Turn, little light bulb...

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Update Time: 2024-10-19

This template belongs to Physics courseware Guangdong and Shanghai Edition Ninth Grade Physics Volume 2 industry PPT template

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