Exploration of magnetoelectricity, experiments of magnetoelectricity

Summary. In order to obtain a strong magnetic field, the coil should be embedded in the stator core slot, and the electromagnet should be used instead of the permanent magnet as the rotor Large rotating pole generator can provide a voltage of several thousand volts to tens of thousands of volts, and the power can reach hundreds of thousands of kilowatts, or even more than one million kilowatts

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First of all, we need to connect a circuit that can generate electricity magnetically, and find two small magnets.

The positive and negative poles are reversed, one is placed on the table, resting, and the other is held in the hand.

Feeling a little resistance, one end of the wire is connected to the light-emitting diode.

Then cut the magnetic inductance line between two small magnets.

In order to obtain a strong magnetic field, the coil should be embedded in the stator core groove, and the electromagnet should be used instead of the permanent magnet as the rotor Large rotating magnetic pole generator can provide a voltage of several thousand volts to tens of thousands of volts, and the power can reach hundreds of thousands of kilowatts, or even more than one million kilowatts.

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Principle of magnetic generation: When a part of the conductor of a closed circuit is cut by magnetic inductance lines, the phenomenon that an electric current will be generated on the conductor is called electromagnetic induction, and the current generated is called induced current.

If a straight metal wire passes through an electric current, then a circular magnetic field will be created in the space around the wire. The greater the current flowing through the wire, the stronger the magnetic field generated. The magnetic field is circular and surrounds the wire.

The direction of the magnetic field can be determined according to the "right-hand spiral rule" (also known as Ampere's rule): the thumb of the right hand is extended, and the other four fingers are bent together towards the palm. In this case, the direction of the four fingers is the direction of the magnetic field, while the direction of the thumb is the direction of the current.

In fact, the magnetic field generated by this straight wire is similar to the effect of placing a circle of small magnets around the wire with the ends of the NS poles connected.

The principle is different. 1. Electromagnetism: There is a magnetic field around the energized conductor. The relationship between the direction of the magnetic field and the current can be determined.

2. Magnetic electricity: When a part of the conductor of the closed circuit is cut by the magnetic inductance line, the phenomenon that an electric current will be generated on the conductor is called electromagnetic induction.

The principle of magnetoelectric generation refers to the phenomenon that when a magnetic field interacts with a conductor, an electric current is generated in the conductor

1.Magnetic field generation and basic concepts:

The magnetic field is generated by the motion of a charged object and can be generated by passing an electric current through a wire or magnet; A magnetic field is made up of magnetic field lines and is directional and magnitude. The strength of the magnetic field can be expressed by the intensity of magnetic induction b in Tesla (t).

2.Faraday's Law of Electromagnetic Induction:

Faraday's law of electromagnetic induction is a law that describes the interaction between a magnetic field and a conductor to produce an induced electromotive force; When the conductor moves relative to the magnetic field, or when the magnetic field changes, an induced electromotive force is generated in the conductor; The magnitude of the induced electromotive force is proportional to the rate of change of the magnetic induction intensity, and the direction is determined by the right-hand rule.

3.Induced electromotive force and current generation:

When an induced electromotive force is generated in a conductor, if the conductor is a closed loop, the induced electromotive force drives the charge to move within the conductor to form an electric current; The free electrons in the conductor are subjected to the force, move through the conductor, and generate an electric current; The magnitude of the current is related to the induced electromotive force and the impedance of the conductor.

4.Application of the principle of magnetism and electricity:

The principle of magnetism is the basic principle in electric power and electronic technology, and is widely used in the working principle of electromagnetic equipment such as transformers, generators, motors, etc.; The principle of magnetoelectric generation is also used in industrial fields such as induction heating and induction welding; The generation of induced electromotive force can also be used to measure the strength and direction of magnetic fields, such as Hall effect sensors.

5.Limitations of the principle of magnetogeneticism:

The principle of magneto-generation is only applicable to the generation of induced electromotive force, and cannot directly convert the magnetic field into electrical energy; The energy conversion efficiency in the principle of magneto-electrification is affected by many factors, such as the strength of the magnetic field, the material and shape of the conductor, etc.

The principle of magnetoelectric generation refers to the phenomenon that when the magnetic field interacts with the conductor, an induced electromotive force will be generated in the conductor, which will drive the charge finger to move in the conductor to form an electric current. This principle is the basis of power and electronic technology, and is widely used in the working principle of various electromagnetic devices as well as induction heating and induction welding in the industrial field. However, the principle of magneto-generation can only realize the conversion from magnetic field to electrical energy, and its energy conversion efficiency is affected by many factors.

The principle of magnetoelectric generation refers to the fact that when a conductor changes the magnetic flux in the magnetic field, it will generate an electromotive force inside the conductor, resulting in a circular rise of electric current.

This phenomenon is described by Faraday's law of electromagnetic induction. According to this law, when the magnetic flux changes through a region, an electromotive force is induced in that region. The change in magnetic flux can be produced by a change in the density of magnetic inductance lines in the magnetic field or by the relative motion of the conductor and the magnetic field.

The reason for this phenomenon is that during the change of the magnetic field, the magnetic field exerts a force on the free electrons in the conductor, which causes the electrons to move in the conductor, which in turn generates an electrically induced electromotive force. If the conductor forms a loop, then this electromotive force causes the electrons to form a flow in the conductor, resulting in an electric current.

In general, the principle of magnetogenesis is based on the principle of electromagnetism, mainly the interaction between the magnetic field and the electric field. The application of magnetism is very wide, including various electrical equipment and technologies, such as generators, electric motors, electromagnets, and many more.

Magnetic electro-reaction

When a conductor moves in a magnetic field or the strength of the magnetic field changes, an electric field is generated inside the conductor. This electric field causes electrons to flow inside the conductor, resulting in an electric current. If the conductor is closed into a loop, an orange electromotive force and current will be formed.

Magneto-electric reactions are based on the principles of electromagnetism and are known in physics as Faraday's law of electromagnetic induction. This law describes the phenomenon of electromotive force and electric current caused by changes in magnetic flux. Magneto-electro-reaction is an important application of electromagnetism, which has a wide range of applications in production and life, such as generators, transformers, electromagnetic induction furnaces and so on.

In industrial production, magneto-electric reactions are widely used in generators and transformers to convert and transmit electrical energy through the interaction between changing magnetic fields and conductors. At the same time, magneto-electric reaction is also widely used in induction furnaces, which use electric current to generate heat energy and use it to melt metals and other materials to achieve automation and efficiency in industrial production.

Magneto-electricity was discovered by the British scientist Faraday. The principle of magnetic generation is that when the conductor of a closed circuit cuts the magnetic inductance line, the phenomenon that an electric current will be generated on the conductor is called electromagnetic induction, and the current generated is called Qingyuan induced current. Generators are made based on this principle.

Discovery processIn 1831, Faraday, a master of electricity, discovered that magnetism can generate electricity. He found two copper wires about 62 meters long and a thick wooden stick, and wound the two copper wires around the wooden sticks, and the two ends of the copper wires were connected to the galvanometer power supply. Then he closed the power supply in the on-response state, at this time, he seemed to feel the needle of the ammeter jump, and then the finger returned to 0 o'clock, could it be that the induced current was generated at the moment of the switch?

Faraday pulled the switch off and was about to reassemble it to see the switch again, and when the switch was pulled back, he saw the pointer bounce again, and then back to 0 o'clock. He repeatedly pulled the switch open and closed, and found the same result.

Based on this experiment, Faraday summarized the law of electromagnetic induction: when the magnetic flux passing through the induction loop changes, an induced current will be generated in the loop, and the direction of the induced current always hinders the change of the magnetic flux in the loop, and the magnitude is proportional to the change in the magnetic flux per unit of time. Negatively charged, electrons flow in the opposite direction to a conventional current within the metal.