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Home > products > Permanent Magnet Alternator > 5-2000kw Rare Earth NdFeB Permanent Magnet Alternator China Factory

5-2000kw Rare Earth NdFeB Permanent Magnet Alternator China Factory

Product Details

Place of Origin: China

Brand Name: ENNENG

Certification: CE

Model Number: PMG

Payment & Shipping Terms

Minimum Order Quantity: 1

Price: USD 1000-5000/set

Packaging Details: seaworthy packing

Delivery Time: 15-120 days

Payment Terms: L/C, T/T

Supply Ability: 20000 sets/year

Get Best Price
Highlight:

2000kw Permanent Magnet Alternator

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Rare Earth NdFeB PM Alternator

Name:
5-2000kw Rare Earth NdFeB Permanent Magnet Alternator China Factory
Current Type:
AC
Power Range:
5-2000kw
Protection Grade:
IP54 IP55
Bearing Brand:
SKF
Cooling Method:
Natural Cooled
Insulation Class:
H
Efficiency:
93%
Voltage:
400v
Material:
Rare Earth NdFeB
Name:
5-2000kw Rare Earth NdFeB Permanent Magnet Alternator China Factory
Current Type:
AC
Power Range:
5-2000kw
Protection Grade:
IP54 IP55
Bearing Brand:
SKF
Cooling Method:
Natural Cooled
Insulation Class:
H
Efficiency:
93%
Voltage:
400v
Material:
Rare Earth NdFeB
5-2000kw Rare Earth NdFeB Permanent Magnet Alternator China Factory

5-2000kw Rare Earth NdFeB Permanent Magnet Alternator China Factory

 

Product Drawing

5-2000kw Rare Earth NdFeB Permanent Magnet Alternator China Factory 0

 

Technical Parameter

No. Parameter Units Data
1 Rated output power KW 250
2 Rated speed RPM 600
3 Rated output voltage VAC 400
4 Rated current A 375
5 Rated frequency Hz 50
6 Poles   10
7 Efficiency at rated speed   >95.9%
8 Winding type   Y
9 Insulation   H class
10 Rated torque Nm 4150
11 Start torque Nm <80
12 Temperature rise °C 90
13 Max.working temperature °C 130
14 Generator diameter mm See the drawing
15 Shaft diameter mm See the drawing
16 Housing material   Casting Iron
17 Shaft material   Steel
18 Bearing   SKF
19 Weight Kg 1800
 

 

Detailed Pictures

5-2000kw Rare Earth NdFeB Permanent Magnet Alternator China Factory 1

What is the permanent magnet generator?

Permanent magnet generators are devices that convert mechanical movements to electricity using their own magnetic fields. It’s a type of electric motor that uses permanent magnets rather than windings on its field. These devices are commonly used in wind turbines, steam turbines, gas turbines, and engines to create electrical power. They consist of two main components: a rotor with powerful magnets and a stator with copper coils. The rotor is made from permanent magnets, and it can generate magnetic fields. Magnetic parts are set around the stators as well, so fluxes could compass them. The stator is composed of rotating coils. Once receiving the magnetic power, the stator generates electricity consequently. In this way, the movement of the rotors is transformed into electric energy. The more stator coils we have, the more electric currents we get.

 

The structure

 

The permanent magnet generator is mainly composed of a rotor, end cover, and stator. The structure of the stator is very similar to that of an ordinary alternator. The biggest difference between the structure of the rotor and the alternator is that there are high-quality According to the position of the permanent magnet on the rotor, the permanent magnet generator is usually divided into a surface rotor structure and a built-in rotor structure.

5-2000kw Rare Earth NdFeB Permanent Magnet Alternator China Factory 2

Working Principle

 

 

The permanent magnet generator uses the principle of electromagnetic induction in that the wire cuts the magnetic field line to induce an electric potential and converts the mechanical energy of the prime mover into electrical energy output. It consists of two parts, the stator, and the rotor. The stator is the armature that generates the electricity and the rotor is the magnetic pole. The stator is composed of an armature iron core, uniformly discharged three-phase winding, machine base, and end cover.

The rotor is usually a hidden pole type, which is composed of excitation winding, iron core and shaft, guard ring, center ring, and so on.

The excitation winding of the rotor is fed with DC current to generate a magnetic field close to the sinusoidal distribution (called the rotor magnetic field), and its effective excitation flux intersects with the stationary armature winding. When the rotor rotates, the rotor's magnetic field rotates together with it. Every time a revolution is made, the magnetic lines of force cut each phase winding of the stator in sequence, and a three-phase AC potential is induced in the three-phase stator winding.

When the pm generator is running with a symmetrical load, the three-phase armature current synthesizes to generate a rotating magnetic field with synchronous speed. The stator and rotor fields interact to generate braking torque. The mechanical torque input from the turbine overcomes the braking torque and works.

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Features

① The generator has many poles, which improve the frequency and efficiency, saving the cost of rectifiers and inverters.

② Finite Element Analysis is used when designing the generator, compact structure. Low startup torque, solves the problem of small wind startup, improving wind energy utilization.

③ Leave out the gear increaser, improve the reliability and efficiency of the generator, and lower the amount of maintenance.

④ H class insulation, vacuum pressure impregnation.

⑤ Have many structures such as vertical axis, horizontal axis, internal rotor, external rotor, and plate type.

⑥ Strong rotors, the generator could achieve high speed.

⑦ Small size, lightweight, high energy density, suitable for special situations.

⑧ Run efficiency throughout the whole speed range, high efficiency.

⑨ Use imported high-speed oil-contained bearings, maintenance free, and high reliability.

⑩ The parameters like voltage, speed, and power can be customized. The shape can be changed. Spline shaft, biaxial extension, and flange can be used.
 
Application
 
1. Permanent magnet generators provide the ideal solution for the Wind Industry.

By matching the power and speed of the generator to that of the wind turbine, the power system becomes more efficient. No gearboxes are needed, and the efficiency of the alternator exceeds 90%.

 

2. Variable speed generators provide a solution for Hydro Industry.

Increased efficiency from variable speed technology could make many more small hydro sites economically feasible to develop.

 

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Future of Permanent Magnet Generator

Based on current trends and advancements in technology, the future of permanent magnet generators looks promising. These generators are becoming increasingly popular in various industries, including wind and hydropower generation, due to their high efficiency, low maintenance, and reliability.

 

One of the significant advantages of permanent magnet generators is their ability to generate power at low speeds, making them ideal for use in low-wind areas and small-scale applications. They also have a more compact design, which reduces the overall weight and size of the generator, making it easier to install and transport.

 

With the growing demand for renewable energy sources, permanent magnet generators are likely to play a significant role in the future of energy production. As technology advances, these generators are expected to become more efficient, cost-effective, and versatile, making them suitable for a broader range of applications.

 

Overall, the future of permanent magnet generators looks bright, and they are likely to continue to be a popular choice for renewable energy production.