Low Rpm 20kw Free Energy Permanent Magnet Synchronous Generator With Ac 3 Phase Output
Product Description
Permanent Magnet Generators offer high efficiency energy conversion, particularly at partial load, and require no separate field excitation system. Our permanent magnet generators are lighter, more efficient, and require less assembly labor than competing designs. Permanent Magnet Generators are used in a large number of applications such as Wind Turbines, Hydro Turbines, motors and others.
1
Rare earth Nd-Fe-B permanent magnets
2
Low Speed
3
Direct Drive ,no use gear-box
4
SKF bearing
5
Power factor close to 1
6
Maintenance free , can be used in all environments .
7
Long life time >20years, could run at high speed 24 hours 365 days .
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Customized : Voltage, Speed, Power, Frequency etc.
9
Multi poles design, improve the frequency and efficiency of rectifiers and inverters.
10
H class insulation, vacuum pressure impregnation.
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Excellent heat dissipation , also can add fan cooling
Rated power
0.5--5000
kW
Rated rotate speed
20--3000
rpm
Rated voltage
48--1140
Vac
Frequency
60/50
Hz
Number of Poles
24
Generator type
3phase AC Synchronous generator
Magnet type
NdFeB
Winding Method
Y
Magnet temperature level
Max.120℃
Winding temperature level
Max.180℃
Effienciency
>95%
Insulate Grade
H
Insulating resistance
100Mohm Min(500Vdc)
Classification of degrees
IP54
Generatror shell material
Cast Iron
Winding material
100% Copper
Shaft material
Steel
Iron Core
Cold rolled silicon steel sheet
Bearing brand
SKF
Cooling Method
Fan Cooling
Weight (N.W /G.W )
132kg /152kg
Packing Size
870*470*570mm
Installation
Horizontal
Advantages
Alternative Energy Generators
GREEF Company provide customized generator according to each customer 's requirements of Voltage, Speed, Power, Frequency etc.
RATED POWER
RATED SPEED
RATED VOLTAGE
FREQUENCY
0.5KW
20rpm~400rpm
12V~220Vac
10Hz~60Hz
1KW
20rpm~600rpm
12V~220Vac
10Hz~60Hz
2KW
20rpm~1000rpm
12V~400Vac
10Hz~60Hz
3KW
20rpm~1500rpm
48V~690Vac
10Hz~60Hz
5KW
20rpm~1500rpm
48V~690Vac
10Hz~60Hz
10KW
20rpm~1500rpm
120V~690Vac
10Hz~60Hz
15KW
20rpm~3000rpm
120V~690Vac
10Hz~60Hz
20KW
20rpm~3000rpm
120V~690Vac
10Hz~60Hz
25KW
20rpm~3000rpm
120V~1140Vac
10Hz~60Hz
30KW
20rpm~3000rpm
120V~1140Vac
10Hz~60Hz
50KW
20rpm~3000rpm
220V~1140Vac
10Hz~60Hz
80KW
20rpm~3000rpm
220V~1140Vac
10Hz~60Hz
100KW
20rpm~3000rpm
220V~1140Vac
10Hz~60Hz
150KW
20rpm~3000rpm
380V~1140Vac
10Hz~60Hz
200KW
20rpm~3000rpm
380V~1140Vac
10Hz~60Hz
250KW
20rpm~3000rpm
380V~1140Vac
10Hz~60Hz
300KW
20rpm~3000rpm
380V~1140Vac
10Hz~60Hz
500KW
20rpm~3000rpm
380V~1140Vac
10Hz~60Hz
700KW
20rpm~3000rpm
690V~1140Vac
10Hz~60Hz
800KW
20rpm~3000rpm
690V~1140Vac
10Hz~60Hz
1MW
200rpm~3000rpm
690V~1140Vac
10Hz~60Hz
2MW
200rpm~3000rpm
690V~1140Vac
10Hz~60Hz
3MW
200rpm~3000rpm
690V~1140Vac
10Hz~60Hz
20KW
20rpm~3000rpm
120V~690Vac
10Hz~60Hz
4MW
600rpm~3000rpm
690V~1140Vac
10Hz~60Hz
5MW
600rpm~3000rpm
690V~1140Vac
10Hz~60Hz
Systems
Customer Photos
Why Choose Us
We are global supplier which focus on Permanent Magnet generator, wind turbine , wind turbine blades, controller, invertor etc.
"GREEF" have its own engineer design team which is design products ourselves. Moreover, we have successfully obtained CE approvals and supports from our customers, which boost our business day by day!
Believe in us, we can accompany you forever.
My farm is 30 kilometers from town, and connecting to the power grid would cost a fortune. Three years ago, I installed a solar panel system with a battery bank. It was sufficient during spring, summer, and fall, but in winter, we often had a week of consecutive overcast days—and the batteries would run out in just three days. Last year, I decided to add a variable-pitch wind turbine, connected it to the AC coupling port of the Deye inverter, and set up a hybrid solar-wind system. Throughout the entire winter, the battery level never dropped below 45%, and I never had to work in the dark again. The Deye app allows me to monitor both the solar and wind turbine data simultaneously, and the transition between them is so smooth it’s almost imperceptible.
Relying solely on solar power during winter on a Nordic farm is a gamble. Only by combining a variable-pitch wind turbine with a Deye inverter—creating a wind-solar hybrid system—can you get through the winter with peace of mind.
I run a small dairy farm in northern Norway, far from the power grid. A few years ago, I installed solar panels and a Deye inverter, but the solar system basically stops working in winter, and the diesel generator was costing me a fortune. This year, I added this variable-pitch wind turbine and connected it to the Deye inverter for a hybrid solar-wind system, and we haven’t had a single power outage all winter. This wind turbine starts up at low wind speeds of just 2–3 on the Beaufort scale. During blizzards, the blades automatically pitch down to slow the turbine, preventing runaway speeds, and it’s much quieter than my neighbor’s fixed-pitch model. The Deye inverter’s switching logic is smart—it prioritizes solar power when available, and automatically switches to the wind turbine when solar output drops. It’s all clearly visible on the app. Now, the diesel generator is practically idle. Wind and solar backing each other up—that’s true off-grid freedom.
“I built a small pico hydro system on the creek behind my off-grid cabin. The water head is only 3 meters and flow rate around 0.2 m³/s – too low for most generators. This axial flux coreless unit starts generating usable power at just 150 RPM. No cogging, no iron loss, and it’s silent. I’m getting 300-400W continuously, 24/7. My old induction generator would barely light an LED at that speed. Absolutely perfect for low-head hydro.”
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