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June 8, 2020
A generator is a mechanical device that converts other forms of energy into electrical energy. The hydroelectric generator uses the hydro turbine as the prime mover to generate electricity. The generator is usually composed of stator, rotor, end cover and bearing. Here we will talk about what is the stator in the hydroelectric generator, and what role does it have?
The stator of the hydroelectric generator is mainly composed of a machine base, an iron core and a three-phase winding coil, etc. The iron core is fixed on the machine base. The three-phase winding coil is embedded in the slot of the iron core. The unit of generator stator base, iron core and three-phase winding is collectively called generator stator, also called armature. A
The stator frame is generally round, and most small-capacity hydroelectric generators use cast iron full-round bases, and also have a box-shaped structure welded with steel plates; the large-capacity hydroelectric generators are made of steel plates with walls and rings. , Ribs and joint plates are welded and assembled. The base should have sufficient rigidity, and at the same time it should be able to adapt to the thermal deformation of the core. A
The stator core is an important part of the stator. It is composed of fan-shaped punching plates, ventilation slot plates, positioning ribs, tooth pressure plates, tensioning screws and fixing plates. The role of the stator core is: as the main component of the magnetic circuit, it provides a magnetic circuit with a small magnetic resistance for the generator to pass the magnetic flux required by the generator and to fix the winding.
The three-phase windings are made of insulated wires, and are evenly distributed in the circular slot of the iron core. The three-phase windings are connected in a Y shape. Its function is that when the rotor poles rotate, the stator windings cut the magnetic lines of force and induce an electric potential.
These are the relevant explanations and functions of the stator in the hydroelectric generator. I believe everyone has a certain understanding of the stator. The stator is the main component of the generator, and its common faults are mostly winding disconnection, short circuit, grounding, poor contact between the tension spring and the brush holder, the tension spring is burnt out, and the stator fixing bolts are loose. You can pay more attention.