Principles of alternators and the need for purchase

An alternating current generator utilizes the principle of electromagnetic induction to convert the mechanical energy generated by the engine driving the generator shaft into electrical energy output.

　　According to Faraday's law of electromagnetic induction, when the magnetic flux (number of magnetic lines of force) passing through the area enclosed by a closed circuit changes (due to relative motion between the conductor and the magnetic field), an induced electromotive force is generated in the circuit. If the circuit is a closed conductor loop, an induced current is produced.

　　An alternating current generator is designed and manufactured based on the above principle, except that the generator's magnetic field is an electromagnetic field. When a current flows in a fixed direction through two carbon brushes (e.g., current flows into carbon brush a and out of carbon brush b), a magnetic field is generated near the coil. The direction of the magnetic field is determined using the right-hand rule. To increase the strength of the magnetic field, a soft iron core is inserted into the center of the coil, which forms a magnet when current flows through it. The magnetic field lines around the magnet emerge from the north pole (N) and return to the magnet via the south pole (S), forming a closed loop. A shaft is fixed to the soft iron. When the engine drives this shaft to rotate, a rotating magnetic field is formed, causing relative motion between the conductor and the magnetic field.

Features of AC generators:

Features of AC generators (compared to DC generators):

1. Compact size, lightweight, and copper-saving;

　　2. Simple structure, reliable operation, easy maintenance, and long service life;

3. Good low-speed charging performance (self-excited method to establish electromotive force);

4. Low radio interference;

5. The regulator used has a simple structure (only a voltage regulator, which inherently has current-limiting and current-cutting functions).

Classification of AC generators

(1) By overall structure

① Conventional AC generator

　　② Integral-type AC generator

　　③ Pump-equipped AC generator

　　④ Brushless AC generator

　　⑤ Permanent magnet AC generator

　（2）By rectifier structure

　　① Six-tube generator

　　② Eight-tube generator

　　③ Nine-tube generator

　　④ Eleven-tube generator

　(3) By Different Types of Magnetic Field Winding Grounding

　　① Internal Grounding Type

　　② External Grounding Type

Selecting the appropriate model requires comprehensive consideration of the following key factors:

Power Output: Ensure that the generator's rated power meets your power requirements.

Voltage and Frequency: Ensure compatibility with the existing power system.

Environmental Adaptability: Factors such as temperature, humidity, and altitude may affect generator performance.

Fuel Efficiency and Durability: Opt for models with low operating costs and high reliability to reduce long-term operational expenses.

Common Application Areas

Manufacturing: Powering heavy machinery and production equipment.

Transportation: Used in marine, aviation, and automotive power systems.

Renewable Energy: Playing a critical role in wind and hydroelectric power systems.

Backup Power: Providing emergency power for homes, commercial facilities, and critical infrastructure.