Synchronous generator

An electrical special-purpose device operating in an autonomous mode from a mechanical motor is a synchronous generator. The device has found application in a private economy. It is used to generate an electrical current of industrial frequency. In addition, the invention operates as a current generator for welding equipment. The synchronous machine is mounted in diesel and gasoline power stations.

Synchronous generator. Device

The electric machine consists of:

1. The stator.

2. The rotor.

3. Winding the generator.

4. Current compounding systems.

5. Stator winding switch.

6. Welding current rectifier.

7. Cables.

8. Welding device.

9. Winding of the rotor.

10. Adjustable current source (permanent).

The synchronous generator is used in the modes: current generator 50 Hz., Welding synchronous generator, device with increased frequency. The invention makes it possible to create compact electrical aggregates of universal application. The synchronous generator drives the equipment in places with no centralized power grids. It can be used in farms far from settlements.

The characteristics of the synchronous generator are designed to create an electric generator with new consumer capabilities. This means that in the implementation of this invention, the same device can be operated as a 50 Hz or more power source, and as a supplier of rectified current for arc welding, it is endowed with a steeply flowing external characteristic of the working area. At the same time, welding properties are provided, which are not inferior to the three-winding collector welding generators of direct current.

How does the synchronous generator work?

The principle of operation is based on electromagnetic induction . There is a transformation of mechanical energy into electrical energy . The electric machine works as a generator (in its mode). In this case, the rotational frequencies of the magnetic fields of the stator and the rotor are the same. On the rotor windings voltage is applied, a magnetic field is formed. Rotating, it penetrates through the stator winding and forms EMF in it.

The rotor is phase and short-circuited type, depending on the type of winding. The auxiliary winding of the stator creates a rotating magnetic field. It induces a magnetic field on the rotor, which induces EMF. At the moment of starting the electric station the rotor creates a weak magnetic field . With the increase in speed, the EMF in the excitation winding increases. The winding voltage penetrates the rotor through the auto-adjusting unit. Control over the output voltage is carried out by changing the magnetic field. Stability is provided by changing the magnetic field of the rotor by controlling the current in its winding. This method of adjustment ensures the stabilization of the output voltage of the device.

Advantages and disadvantages of synchronous generator

The first relates to the constancy of the outgoing voltage. The downside is the possibility of overloading under increased load. The regulator can increase the current in the rotor winding. The disadvantages of a synchronous generator can also be attributed to the presence of a brush device. Over time, it will need maintenance. Nowadays this defect has been eliminated.

Modern generators of a synchronous type are produced without a brush assembly. Equipment of the new generation has a long service life, reliability in work in difficult production conditions. Built-in sensors and electronics provide real-time operation. The newest technological solutions provide a synchronous generator with high efficiency. The products are used in industry and in ship equipment.