Which is bigger, generator or motor, and the difference between motor and generator?

Generators are also known as synchronous generators, and the power systems of China and a bunch of countries led by the former Soviet Union are all 50Hz frequency, and 60Hz in Western countries. When you say 1500 rpm, you mean a generator with 2 pairs of poles. The 1500 rpm motor you are talking about is also a synchronous motor, if it is an asynchronous motor, the speed should be about 1480, there is a slip rate, and the asynchronous motor is divided into squirrel cage type (such as Y series) and winding type (such as ZR series).

I can tell you clearly that synchronous motors can be used as generators, and generators can also be used as motors.

Therefore: 1. The 1500 rpm motor and generator you mentioned are essentially the same thing. So it's just as heavy.

2. If you are talking about 20kw generator and 20kw squirrel cage motor, then the generator is heavy.

3. If you are talking about 20kw generator and 20kw winding motor, then the motor is heavy.

4. If you are talking about commercial integrated 20kw generators including diesel engine parts, then the generators are heavier than other forms of motors.

As for torque, the torque of the motor is only related to the voltage, and the higher the voltage, the greater the torque.

As for the fact that there is no torque in the generator, if there is, it is the output torque of the 20kw diesel engine.

It's detailed enough, divide, take it.

They have nothing to do with the speed of the size, in terms of power, the same power and the generator can not carry the same power of the motor, in the conversion of electricity there is a reactive power, that is, useless power, that is, loss.

The synchronous motor can be used as a generator, and the generator can also be used as a motor, and when the generator is used as a synchronous motor, it is called a generator in the system for synchronous condenser operation.

The rotating motor and generator are essentially the same thing. So it's just as heavy.

2. If it is a 20kw generator and a 20kw squirrel cage motor, then the generator is heavy.

3. If it is a 20kw generator and a 20kw winding motor, then the motor is heavy.

4. If the commercial integrated 20kw generator includes the diesel engine part, then the generator is heavier than other forms of motors.

It should be a slightly larger generator, if it is a product of the same era.

But I haven't noticed that there is such a low speed generator as 1500 rpm.

Motor refers to an electromagnetic device that converts or transmits mechanical energy and electrical energy according to the law of electromagnetic induction. The main function of the electric motor is to generate driving torque, which serves as a power source for various machinery. The main role of the generator is to use mechanical energy to convert into electrical energy, and most commonly, to use thermal energy, water level energy, nuclear energy, etc., to push the generator rotor to generate electricity.

The structure of the electric motor and the generator is exactly the same, and both are composed of coils, magnets, commutators, brushes, and other parts. In other words, the same motor can be used as both an electric motor and a generator.

The professional saying is: the electrical energy emitted by the generator is related to the strength of the magnetic field and the mechanical energy transmitted to the shaft of the motor; The mechanical energy output from the motor to the rotating shaft is related to the electrical energy and magnetic field strength input from the grid to the motor; The magnetic field is the medium, which is the medium to realize the electromechanical energy conversion. It's not hard to spot:

Generators are made based on electromagnetic induction; The motor is made according to the principle of the movement of an energized conductor under force in a magnetic field; The right-hand rule is used to judge the direction of current in the generator, and the left-hand rule is used to determine the direction of conductor movement in the motor. The generator needs external work to convert mechanical energy into electrical energy, and the motor does external work to convert electrical energy into mechanical energy.

Knowledge development - the development direction of inverter motors.

1) Insulation performance. Class B temperature rise design, Class F insulation manufacturing. The use of polymer insulating materials and vacuum pressure impregnated paint manufacturing process and the use of special insulation structure make the electrical winding use insulation withstand voltage and mechanical strength greatly improved, which is enough to be competent for the high-speed operation of the motor and resist the high-frequency current impact of the inverter and the damage of voltage to the insulation.

2) Vibration and rotational speed. The mechanical parts with high balance quality and vibration level R (vibration reduction level) have high machining accuracy, and special high-precision bearings are used to enable high-speed operation.

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The forced ventilation and heat dissipation system all adopt imported axial fans with ultra-quiet, high life and strong wind power.

3) Speed regulation range. It has a wider speed regulation range and higher design quality, and is designed with a special magnetic field to further suppress the higher harmonic magnetic field to meet the design indicators of wide frequency, energy saving and low noise. It has a wide range of constant torque and power speed regulation characteristics, stable speed regulation, no torque ripple.

4) Matching relationship with inverter. It has good parameter matching with all kinds of inverters, and with vector control, it can realize zero-speed full torque, low-frequency high torque and high-precision speed control, position control and fast dynamic response control. YP series inverter special motors can be equipped with brakes, encoders are supplied, so that you can get precise stopping, and high-precision speed control through closed-loop control of speed.

5) System control combination. The combination control of reducer, special motor for frequency conversion, encoder and frequency converter is used to realize the precise control of ultra-low speed stepless speed regulation.

The difference between a motor and a generator is:

1. The motor is the motor, which is a device that converts electrical energy into kinetic energy; Whereas, a generator is a device that converts kinetic energy into electrical energy, and the two are just the opposite;

2. The motor is made with the left-handed rule; Whereas, generators are made using the principle of electromagnetic induction.

Electric motors, electrical energy is converted into mechanical energy.

Generators, where mechanical energy is converted into electrical energy.

Electric motors and generators are two opposing concepts.

First, the working principle.

Electric motor: An energized conductor is subjected to a force in a magnetic field.

Generator: By turning the rotor or a magnetic field outside, the magnetic field lines are cut to generate electricity. (Laws of Electromagnetic Induction and Laws of Electromagnetic Force).

2. Energy conversion motor: electrical energy is converted into mechanical energy.

Generators, where mechanical energy is converted into electrical energy.

There is no essential difference between generators and motors in terms of structure, because they are used in different ways and purposes, and the functions they achieve are different. Of course, in the design of the motor, there will be certain "subtle" differences in the details such as electromagnetic load and assembly structure according to the different requirements of use. The motor can be used as a generator, and the generator can also be used as an electric motor.

Given enough power to an ordinary electric motor, the motor will become an "excellent" generator. A 220V motor will turn into a 220V generator at the rated speed.

Addendum: In principle: Generators use electromagnetic induction to convert mechanical energy into electrical energy.

The motor uses the principle of an electric current being subjected to ampere force in a magnetic field to convert electrical energy into mechanical energy. Structurally: The generator is driven by an external force, turning the coil to cut the magnetic field lines and generate current.

The motor is an energized coil that moves in a magnetic field due to ampere force and drives other objects to move. Generators turn kinetic energy into electrical energy, and electric motors are the opposite. The electric motor has enough power to generate electricity, and the electricity emitted may be slightly lower than 220 volts.

Addendum: It should be the generator first. 1834 Germany Jacobi invents the DC engine 1888 Yugoslav-American Tesla invents the alternating current electric motor In 1821, the British scientist Faraday first proved that electricity could be converted into rotational motion.

The first person to make an electric motor is said to be Jacobi in Germany. Around 1834, he became a simple device: between two U-shaped electromagnets, a six-arm wheel with two rod-shaped magnets in each arm.

After the power is applied, the rod magnet and the U-shaped magnet have mutual attraction and repulsion effects, driving the wheel axle to rotate. Later, Jacobi made a large installation. Installed in a dinghy powered by 320 denier batteries, the dinghy made its first voyage on the Elbe in 1838 at a speed of only kilometres per hour

The difference between an electric motor and a generator is, first of all, the difference in the working principle.

The working principle of an electric motor is the action of a magnetic field on the force of an electric current, whereas a generator is based on the laws of electromagnetic induction and the laws of electromagnetic force.

The second is that the judgment method is different, the direction of movement of the conductor in the motor in the magnetic field is judged according to the left-hand rule, while the current direction in the generator is judged according to the right-hand rule. Finally, the purpose of work and energy conversion are different. An electric motor needs to do work on the outside world and convert electrical energy into mechanical energy, whereas a generator needs to do work on the outside world and then convert mechanical energy into electrical energy.

The generator works according to the principle of electromagnetic induction, the coil rotates and cuts the magnetic inductance line in the magnetic field to produce induced current, the generator converts mechanical energy into electrical energy when working, and the components are stator, rotor, brush, slip ring or commutator, the generator has two kinds of alternator and DC generator, the alternator is a slip ring, and the DC generator is a commutator. The motor works according to the principle of the force of the current on the conductor, the energized coil can rotate in the magnetic field, the electric energy is converted into mechanical energy when the motor is working, the components of the motor are stator, rotor, brush, slip ring or commutator, the motor has two kinds of DC motor and AC motor, DC motor is commutator, AC motor is slip ring. The structure of the motor and the generator are basically the same, but the principle is different.

If a diesel engine is used to rotate the rotor of the electric motor, it can also generate electricity, and conversely, if the stator of the generator is energized, the generator can also rotate, and it becomes an electric motor.

The magnet on the generator will attract iron, it is a permanent magnet steel body, there are two ways to do the generator, one is to use the permanent magnet steel body to make the rotor of the generator, when the rotor of the generator is rotated by the mechanical drag, the magnet of the rotating magnetic steel body is cut by the stator coil of the generator, so that electricity is generated, and the load is connected to the wire head of the stator, the generator power made by this method is larger, and can send out three-phase electricity, and most of the generators (such as wind turbines) are excitation power is carried out in this way, The other is to use two corresponding heteropolar permanent magnet steel bodies to make the stator, and the coil head of the rotor is connected to the slip ring with a carbon brush to connect with the load, and the generator power made by this method is small, and generally only single-phase electricity (or direct current) can be obtained;

The generator is to turn mechanical energy into electrical energy, and the motor is to convert electrical energy into mechanical energy, that is, magnetic-electric, electric-magnetic conversion.

A generator is a mechanical device that converts other forms of energy into electrical energy, and a motor is a device that converts electrical energy into mechanical energy. This ** mainly details the difference between a generator and an electric motor.

The principle is different, and the generator is made according to the phenomenon of electromagnetic induction. The motor is made according to the principle of the movement of an electrical conductor under force in a magnetic field.

The structure of the generator and the motor is basically the same, and the energized operation can be the motor; The prime mover drags the rotor to rotate, and the magnetic field cuts the stator windings to generate an electromotive force that becomes a generator.

First of all, the motor and generator are basically the same in terms of comprehensive structure, and both are reversible.

The motor is rotated by an electric coil in a magnetic field by ampere force, and drives other objects to move in the process of movement. The generator is driven by a physical external force, turning the coil to cut the magnetic field lines and generate an electric current.

Knowing the structure, we know the principle: the motor is the power that uses the current to convert into mechanical energy and drive the rotation of external objects, and the generator uses electromagnetic induction to convert mechanical energy into electrical energy.

There is no equivalence between the motor and the generator! Even if there is reversibility between the motor and the generator! But it's not a reciprocal relationship either!

Then in the process of use, we combine them and it will not become a perpetual motion machine, because there is conservation of energy. Motors are widely used in automobile motors, household appliances such as fans, refrigerators, air conditioners, vacuum cleaners, etc.

The differences between generators and electric motors are as follows:

1. The principle is different. Generators are made based on electromagnetic induction; The motor is made according to the principle of the movement of an energized conductor under force in a magnetic field;

2. Different judgment methods. The right-hand rule is used to judge the direction of current in the generator; The direction of movement of the conductor in the motor is based on the left-hand rule.

3. The purpose of work and the transformation of energy are different. Generators need external work to convert mechanical energy into electrical energy; The motor does external work to convert electrical energy into mechanical energy.

There are two types of generators, "generators" and "alternators", where generators produce direct current and alternators produce alternating current. Generators are the first form of generators useful for industrial applications, electric generators use rotating wire coils and magnetic fields to convert mechanical energy into direct current. Initially, generators were used to generate electricity and used steam as a ** to produce the required mechanical energy.

The use of power generatorsIn addition to a few low-power applications, alternators are more widely used to generate electricity. These types of generators convert mechanical energy into alternative electrical current. A rotating magnet acts as a rotor and rotates inside a set of conductor coils on the core, which becomes the stator.

As the magnetic field rotates, they produce an alternating voltage in the stator. Magnetic fields can be generated by magnets or electromagnets of magnetic field coils.