Features Of Permanent Magnet Water / Hydro Turbine Generator


1. The permanent magnet generator rotor adopts rare earth permanent magnet steel, no external excitation, no carbon brush, no sparks, no excitation winding, high motor rotor strength, no excitation control box, high generator efficiency, compact structure, and high reliability. The volume-to-weight ratio of the electric excitation generator with the same parameters is reduced by 30%, which reduces the construction cost.

2. The generator can achieve low-rated speed, eliminating the need for gearbox pulleys, etc. The hydraulic turbine directly drives the generator to improve system efficiency. The generator can output a power frequency of 50HZ at low speed. With the grid-connected inverter, the turbine can be released. In the dry season, the generator set runs at a low speed and supplies power to the grid through the inverter; during the summer wet season, the turbine can eat more water, and the generator set runs at high speed, which can generate more electricity. The generator runs efficiently throughout the speed range.

3. Protection level: IP54, to prevent water, mud, and dust from entering the inside of the motor, and has a long service life. It is especially suitable for field needs. It is widely used in wind power, hydropower, ocean power, and other new energy power generation occasions.

4. The motor is air-cooled or water-cooled, and the temperature is low. The motor adopts imported oil-containing bearings, which are maintenance-free, have high reliability, and have a long service life. The motor voltage, speed, power, and other parameters can be changed according to the needs, and the generator can be made into a horizontal or vertical type. It can use spline shaft extension, double shaft extension, front end stop output, etc., and can be treated with three preventions.


The difference between a permanent magnet hydroelectric generator and an excitation generator is that its excitation magnetic field is generated by a permanent magnet. The permanent magnet is both a magnetic source and a component of the magnetic circuit in the motor.

The magnetic performance of the permanent magnet is not only related to the manufacturing process of the manufacturer, but also related to the shape and size of the permanent magnet, the capacity of the magnetizer, and the magnetizing method, and the specific performance data is very discrete.

Moreover, the magnetic flux and magnetomotive force that the permanent magnet can provide in the motor also vary with the material properties, size, and motor operating state of the rest of the magnetic circuit.

In addition, the magnetic circuit structure of the permanent magnet generator is diverse, the leakage magnetic circuit is very complicated and the leakage magnetic flux accounts for a large proportion, the ferromagnetic material part is relatively easy to saturate, and the magnetic permeability is nonlinear. These all increase the complexity of the electromagnetic calculation of permanent magnet generators, making the accuracy of the calculation results lower than that of electrically excited generators.

Therefore, it is necessary to establish a new design concept, re-analyze and improve the magnetic circuit structure and control system; it is necessary to apply modern design methods and research new analysis and calculation methods to improve the accuracy of design calculations; it is necessary to study the use of advanced testing methods and manufacturing craft.


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