"The Principle of Electric Motor Rotation" PPT courseware on electric motors and generators

Description

"The Principle of Electric Motor Rotation" PPT courseware on electric motors and generators

teaching objectives:

1. Understand that the current-carrying wire will be affected by force in the magnetic field, and know that the direction of the force is related to the direction of the current and the magnetic field.

2. Know that the force exerted on a current-carrying conductor in a magnetic field is related to the strength of the current and the strength of the magnetic field.

3. Apply the knowledge you have learned to analyze the working principle of the motor, and use the force of the magnetic field on the current to analyze and solve certain practical problems.

4. Know what a commutator is and its function. Know the energy conversion of electric motors.

Important and difficult points:

(1) The force exerted on a current-carrying conductor in a magnetic field is related to the strength of the current and the strength of the magnetic field.

(2) Analyze the working principle of the electric motor

Experiment: Explore the effect of magnetic fields on electric current

Experiment name: Explore the effect of magnetic field on electric current

Experimental phenomenon: The switch is closed and the metal rod is found to move.

Energy conversion: electrical energy into mechanical energy

Experimental conclusion: A current-carrying conductor will be acted upon by a force in a magnetic field, and the direction of the force is related to both the direction of the current and the direction of the magnetic field.

Experimental applications: electric motors, moving coil speakers (speakers)

1. Structure of electric motor:

Magnets, coils, commutators, brushes.

2. Commutator:

(1) The structure of the commutator: consists of two metal (copper) semicircular rings insulated from each other;

(2) The function of the commutator: when the coil has just rotated through the equilibrium position, it automatically changes the direction of the current in the coil to make the coil continue to rotate.

3. Working principle of electric motor:

The energized conductor is acted upon by force in the magnetic field, causing the coil to rotate. At the same time, the direction of the current in the coil is changed in time through the commutator to maintain the continuous rotation of the coil.

4. Advantages of electric motors:

It has simple structure, low cost, high efficiency, easy operation and little environmental pollution.

Precautions:

1. The force direction of the energized conductor in the magnetic field indicates the rotation direction of the motor; (If you change one of them, it will change.)

2. The force exerted by the energized conductor in the magnetic field indicates the rotation speed of the motor. The larger the force, the faster the rotation speed.

Thinking: How to change the speed of the motor?

(1) Increase the current;

(2) Increase the magnetism of the magnet;

(3) Add lubricating oil to reduce the friction between the coil and the rotating shaft.

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

1. Magnetoelectric current meter;

2. Moving coil speakers (speakers);

3. Electric toys and robots.

Structural diagram of a moving coil speaker:

Keywords: Teaching courseware of electric motors and generators, teaching courseware of the principle of electric motor rotation, Guangdong and Shanghai version physics PPT courseware download for the second volume of the ninth grade, download of the ninth grade physics slide courseware, download of the PPT courseware of electric motors and generators, PPT courseware of the principle of electric motor rotation Courseware download, .PPT format;

For more information about the "Principles of Motor Rotation of Electric Motors and Generators" PPT courseware, please click the "Principles of Electric Motors and Generators PPT Rotation of Electric Motors" ppt tag.

"Principle of Electric Motor Rotation" Electric Motors and Generators PPT Courseware 4:

"The Principle of Electric Motor Rotation" PPT Courseware on Electric Motors and Generators 4 Review Review 1. The main components of the electric motor: the stator with magnets and the rotor with coils 2. Simplification of coils: coil group, one group of coils, one coil, and one section of conductor 3. Conjecture about motor rotation...

"Principle of Electric Motor Rotation" Electric Motors and Generators PPT Courseware 3:

"Principle of Motor Rotation" Motor and Generator PPT Courseware 3 1. Learning Objectives: 1. Understand that energized wires will be acted upon by forces in the magnetic field, and know that the direction of the force is related to the direction of the current and the direction of the magnetic field. 2. Know the magnitude of the force exerted on a current-carrying conductor in a magnetic field..

"Principle of Electric Motor Rotation" PPT Courseware of Electric Motors and Generators 2:

"The Principle of Electric Motor Rotation" PPT courseware of electric motors and generators 2 1. Why can electric motors rotate? Conjecture: A current-carrying conductor (coil) may experience a force in a magnetic field. Experimental investigation ①. The effect of magnetic field on energized conductor. The experiment shows that: when connected...

File Info

Update Time: 2024-11-23

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

Preview