Low Noise And Maintenance Low Rpm Permanent Magnet Alternator
Product Drawing
Technical Parameter
| No. | Parameter | Units | Data |
| 1 | Rated output power | KW | 200 |
| 2 | Rated speed | RPM | 500 |
| 3 | Rated output voltage | VAC | 400 |
| 4 | Rated current | A | 300 |
| 5 | Efficiency at rated speed | | ＞95.3% |
| 6 | Winding type | | Y |
| 7 | Rated frequency | Hz | 50 |
| 8 | Poles | | 12 |
| 9 | Rated torque | Nm | 3880 |
| 10 | Start torque | Nm | ＜60 |
| 11 | Temperature rise | °C | 90 |
| 12 | Max working temperature | °C | 130 |
| 13 | Generator diameter | mm | See the drawing |
| 14 | Shaft diameter | mm | See the drawing |
| 15 | Housing material | | Casting Iron |
| 16 | Shaft material | | Steel |
| 17 | Bearing | | SKF |
| 18 | Weight | Kg | 1250 |
| | | |
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.
