The hydrogenerator is a synchronous motor.
Features: Large number of poles/large diameter/short axial length/vertical type.
The stator core is made of sector-shaped electrical steel sheets. Radial ventilation trenches.
The rotor adopts salient pole type/magnetic poles are made of steel sheets with a thickness of 1-2mm/the damping winding (starting winding) suppresses the current of short circuit and weakens the oscillation of the motor/magnetic winding The poles and yoke of the magnetic pole adopt T-shaped or pigeon-shaped tail connection.
The rated speed can be calculated using the rated frequency and the number of poles, 60*f/p.
For more details, see Electrical engineering.
What are the parts of a generator?
1. A hydrogenerator consists of a water turbine and a generator. The water turbine is driven by water, just like a water wheel on the side of the road. . The generator is driven by a water turbine, via a shaft.
2. The rotating part of the generator is called the rotor and the circle around the rotor is the stator. There are copper wires inside the stator that transmit energy outside. The rotor also has copper wires. However, the rotor's copper wires are not used to provide power to the outside world. Instead, the outside world provides direct current. The rotor. Once energized, the rotor becomes an electromagnet. The electromagnet The iron rotates to produce electricity. ! !
The composition and function of each part of the hydrogenerator
The generator mainly consists of arotor (magnetic pole), a stator (armature), a rectifier and a voltage. regulator, front and rear covers, brushes and brush holders, etc.
1. Rotor
LThe function of the rotor is to generate a magnetic field. The rotor consists of claw poles, magnetic yoke, field winding, slip ring, rotor shaft, etc.
2. Stator
The stator is installed outside the rotor and secured with the front and rear covers of the generator. When the rotor rotates inside, Causes the magnetic flux in the stator winding to change and generates an alternating induced electromotive force in the stator winding.
3. Rectifier?
The function of the rectifier is to convert the three-phase alternating current from the stator winding into direct current. The rectifier consists of a rectifier plate and a rectifier diode.
4. Voltage regulator
The voltage regulator regulates the output voltage of the alternator.
5. Front and rear tips
The generator tips playent the role of fixing the rotor, stator, rectifier and brush components.
The aluminum alloy cast generator end cover can effectively prevent magnetic flux leakage, and the aluminum alloy has good heat dissipation performance.
6. Brush and brush holder
The brush is an important component of the motor and is responsible for conducting current between rotating and stationary parts.
6.
What I mentioned above is only Francis type. For Francis turbines, in addition to these, there are also bypass elbows, tailrace elbows and sometimes. Additional pneumatic device, telescopic tube, small unit, flywheel, cooling system, lubrication system, etc. For units above 1000 kW, the flywheel is on the motor.
For impact turbines and oblique impact turbines, it iss mainly include: impeller, main shaft, bearings and bearing seats, water spray elbow (containing: spray needle, spray needle rod, nozzle, etc.) , the machine seat, water diversion elbow, telescopic pipe, etc.
For axial flow turbines, it is mainly: channel chamber, channel, bearing box, main shaft, flywheel, machine cover, water guide bearing and some guide bearings, etc.
Generator; rotor, stator, slip ring, carbon brushes, bearings, cooling system, lubrication system