The main stock of generator sets is Shanghai Diesel Co., Ltd. (600841).
Shanghai Diesel Co., Ltd. (600841): power generator leader According to the closing information on December 3, the stock price of Shanghai Diesel Diesel Co., Ltd. fell 0.96%. within 5 days. As of 3:00 p.m., the stock traded 13.51 yuan, down 0.66 percent, with a total market value of 22.042 billion yuan.
The 2020 annual report shows that Shanghai Diesel Co., Ltd. achieved a net profit of 203 million yuan, a year-on-year increase of 73.98% and a compound growth rate of 18.46%. the last four years; earnings per share were 0.2350 yuan.
The company's main activity is the design, production and sale of diesel engines for construction machinery, vehicles, ships and generators. Products are available in construction machinery, trucks, bus, agricultural machines, ships, mobiles. Power plants and other areas.
What type of generator?
The classification of generators includes:
Generators are divided into: DC generators and alternators; AC generators are divided into: synchronous generators and asynchronous generators (rarely adopted); can also be divided into single-phase generator and three-phase generator.
There are many types of generators. In principle, they are divided into synchronous generators, asynchronous generators, single-phase generators and three-phase generators.
In terms of generation methods, they are divided into steam turbine generators, hydraulic generators, diesel generators, gasoline generators, etc. In terms of energy, it is divided into thermal generators, hydraulic generators, etc.
Detailed information:
1. Operating characteristics:
The performance of synchronous generators is mainly characterized by no-load characteristics and on-load operating characteristics. These features provide an important basis for users to choose generators.
2. No-load characteristics:
When the generator is not connected to a load, the armature current is zero, which is called no-load operation. At this time, the three-phase motor stator winding only has the no-load electromotive force E0 (three-phase symmetry) induced by the excitation current If, and its size increases with the increase of If. However, due to the saturation phenomenon in the core of the motor magnetic circuit, the two are not proportional. The curve reflecting the relationship between the no-load electromotive force E0 and the excitation current If iscalled no-load characteristic of the synchronous generator.
3. Armature Reaction:
When the generator is connected to a symmetrical load, the three-phase current in the armature winding will produce another rotating magnetic field, called the armature. reaction magnetic field. Its speed is exactly equal to the speed of the rotor and the two rotate synchronously.
The armature reaction magnetic field and the excitation magnetic field of the synchronous generator rotor can be approximately considered to be distributed according to the sinusoidal law. The spatial phase difference between them depends on the temporal phase difference between the no-load electromotive force E0 and the armature current I. The armature reaction magnetic field is also related to the charge state.
When the generator load is inductive, the armature reactionThe magnetic field acts as a demagnetizer, which will decrease the generator voltager; When the load is capacitive, the armature reaction magnetic field acts as a magnetizer, which will increase the output voltage of the generator.
Baidu Encyclopedia - Generator
Generators can be divided into DC generators and AC generators Since AC generators are superior to DC generators in many aspects, DC generators are generators. eliminated, and currently all cars use alternators. Alternators are divided into the following categories according to different classification methods:
Five categories according to overall structure
(1) Ordinary alternator (one). generator which requires a voltage regulator when used)
(2) Integrated alternator (the generator and regulator are transformed into an integrated generator)
(3) Alternator with pump ,
(4) Brushless alternator (generator that does not require brushes)
(5) Alternatorpermanent magnet (generator with magnetic poles made of permanent magnets)
It is divided into four categories according to the structure of the rectifier
(1) Six-tube alternator
(2) Eight-tube alternator
(3) Nine-tube alternator
(4) Eleven-tube alternator
Constructed according to winding of the magnetic field Two types of iron types
(1) One end (negative pole) of the magnetic field winding of an internally grounded alternator is directly grounded (connected to the case)
(2) Externally grounded One end (negative pole) of the magnetic field winding of the iron type alternator is connected to the regulator, and then connected to the iron after have passed through the regulator.