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Address: No. 18, Xinye Road, High-Tech Zone, Qingdao,Shandong, China
Contact name:Cindy
QINGDAO ENNENG MOTOR CO.,LTD. |
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Green Energy 10kw 20kw Low Rpm Permanent Magnet Wind Turbine Generator
Product Drawing
Technical Parameter
Rare earth Nd-Fe-B permanent magnets |
Low Speed |
Direct Drive ,no use gear-box |
SKF bearing |
Power factor close to 1 |
Maintenance free , can be used in all environments . |
Long life time >20years, could run at high speed 24 hours 365
days. |
Customized : Voltage, Speed, Power, Frequency etc. |
Multi poles design, improve the frequency and efficiency of
rectifiers and inverters. |
H class insulation, vacuum pressure impregnation. |
Excellent heat dissipation , also can add fan cooling |
Detailed Pictures
A permanent magnet generator (PMG) is an electric generator that uses permanent magnets to create a magnetic field. The magnetic field is used to induce a voltage in a coil of wire that is connected to the generator. This voltage is then used to power electrical devices or to store energy in batteries.
The structure
The design of a PMG is relatively simple. It consists of a rotor, stator, and permanent magnets. The rotor is a rotating shaft that contains permanent magnets. The stator is a stationary component that surrounds the rotor and contains the coils of wire. When the rotor spins, the magnetic field created by the permanent magnets cuts across the coils of wire in the stator, inducing a voltage.
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.
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.
Advantages of permanent magnet generator
1.Simple structure and high reliability
The permanent magnet generator eliminates the excitation winding, carbon brush and slip ring structure of the excitation generator, and the whole machine has a simple structure, which avoids failures such as easy burnout and disconnection of the excitation winding of the excitation generator, easy wear and tear of carbon brushes and slip rings, etc., and the reliability is greatly improved.
2. Small size, lightweight, high specific power
The adoption of the permanent magnet rotor structure makes the internal structure design of the generator very compact, and the volume and weight are greatly reduced. The simplification of the structure of the permanent magnet rotor also reduces the moment of inertia of the rotor, increases the practical speed, and achieves a very high specific power (that is, the ratio of power to volume).
3. Good power generation performance at medium and low speeds
In the case of the same power level, at idle speed, the output power of the permanent magnet generator is twice that of the excitation generator, that is to say, the excitation generator of the actual power level of the permanent magnet generator.
4. Can significantly prolong battery life and reduce battery maintenance work
The main reason is that the permanent magnet generator adopts a switch-type rectification and voltage stabilization method, which has high voltage regulation accuracy and a good charging effect. It avoids the shortening of battery life caused by over-current charging. The open-type rectification output of the permanent magnet generator uses small current pulses to charge the battery, and the charging effect is better with the same charging current, thereby prolonging the service life of the battery.
5. High efficiency
The permanent magnet generator is an energy-saving product. The permanent magnet rotor structure eliminates the excitation power required to generate the rotor magnetic field and the mechanical loss of friction between carbon brushes and slip rings, which greatly improves the efficiency of the permanent magnet generator. The average efficiency of ordinary excitation generators is only 45% to 55% in the speed range between 1500 rpm and 6000 rpm, while that of permanent magnet generators can be as high as 75% to 80%.
6. Using a self-starting voltage regulator
No need for external excitation power supply. The generator generates electricity as long as it spins. When the battery is damaged, the car charging system can still work normally as long as the engine is running.
7. Especially suitable for working in humid or dusty harsh environments.
8. No radio interference
The permanent magnet generator has no carbon brush and no-slip ring structure, which eliminates the radio interference caused by the friction between the carbon brush and the slip ring; also reduces the requirement of the generator for the ambient temperature.
