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Low Rpm Permanent Magnet Alternator Low Noise And Maintenance

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Low Rpm Permanent Magnet Alternator Low Noise And Maintenance

Country/Region china
City & Province qingdao shandong
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Product Details

Low Noise And Maintenance Low Rpm Permanent Magnet Alternator​

 

Product Drawing

 

Technical Parameter

No.ParameterUnitsData
1Rated output powerKW200
2Rated speedRPM500
3Rated output voltageVAC400
4Rated currentA300
5Efficiency at rated speed >95.3%
6Winding type Y
7Rated frequencyHz50
8Poles 12
9Rated torqueNm3880
10Start torqueNm<60
11Temperature rise°C90
12Max working temperature°C130
13Generator diametermmSee the drawing
14Shaft diametermmSee the drawing
15Housing material Casting Iron
16Shaft material Steel
17Bearing SKF
18WeightKg1250
    
 

Detailed Pictures

What is the permanent magnet generator?

The permanent magnet generator is a device that converts mechanical energy to electrical energy. In this device, the rotor windings have been replaced with permanent magnets. Permanent magnet generators are used mostly in industrial applications like turbines and engines to produce commercial electrical energy, the permanent magnet alternator is an alternate source of energy and has multiple benefits which make it a great device for a variety of residential, commercial, and industrial applications.

 

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.

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.

 

The permanent magnet alternator’s rotor is directly equipped with a wind turbine so that it can generate fixed electrical power. The efficiency of permanent magnet synchronous alternators is way higher than that of asynchronous generators. It offers a variety of merits over asynchronous generators and they are as follows:

 

 

· Direct drive (No speed multiplier, no gearbox needed)

 

· Virtually no maintenance

 

· Highest power-to-weight ratio in direct drive

 

· High efficiency

 

· Simplification of mechanical design · Easy mechanical interface

 

· Cost optimization

 

· They are environmentally friendly and do not rely on the external weather to produce electricity

 

· They are smaller in size and hence require very less space compared to other types of generators.

 

· These permanent magnet generators run for years and beyond without any wear and tear. Additionally, they are soundless and noise-free thus making zero sound pollution.

 

 

APPLICATIONS OF PERMANENT MAGNET GENERATOR

· Low-speed, direct-drive PMGs operate without any gearbox and fast-rotating parts, resulting in increased reliability and superior drive train efficiency.

· Generator can be designed with a segmented stator construction. This provides redundancy and makes it possible to repair the generator in the nacelle without full disassembly. Optionally, our generator design can use the generator bearing as a turbine main bearing to integrate the turbine brake system into the generator construction. Benefits are simplicity, fewer components, and therefore, higher reliability.

· With the rising cost of electricity, an increasing number of populations are looking for an alternate source of energy and permanent magnet generators fit this gap perfectly. These generators can also reduce the strain on the environment as they do not use any non-renewable sources of energy for producing electricity.

 

 

 

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