Permanent Magnet Generator VS Excitation Generator

1. Permanent magnet generator can operate at variable speed

The electric excitation generator can only run at a constant speed. When the speed changes greatly, the AVR of the electric excitation generator will desperately increase the excitation current, and to a certain extent, the excitation coil will be burned. The rotor of the permanent magnet generator uses a strong constant magnetic field, and changes in rotational speed will not burn out the motor.

2. The permanent magnet generator can be used in high temperatures, high humidity, and marine environments.

The permanent magnet generator does not require an excitation winding, and the rotor does not generate heat. The generator only needs to cool the outer surface of the motor, and the cooling air only needs to blow on the motor casing. On special occasions, it can also be easily water-cooled. The rotor excitation winding of an electric excitation generator is a concentrated winding and is the main source of heat. It must be cooled by outside air entering the generator. It cannot be used in humid environments such as the ocean.

3. Permanent magnet generators have obvious advantages in low-speed situations

The permanent magnet generator rotor does not have an excitation coil and can be easily made into multi-poles, such as 100 poles. The generator can generate 400V 50HZ electric energy at 60 rpm. It is almost impossible to make an electric excitation generator with 100 poles, since the cost of making it is much higher than that of a permanent magnet generator.

Permanent Magnet Generator VS Excitation Generator插图

4. High-efficiency permanent magnet generator with high power

At present, large-capacity generators all adopt the electric excitation method, that is, an excitation winding is installed on the generator rotor, and the main magnetic field of the generator is generated by applying an external current. Since the winding is wound with multiple turns of coils, this generator The speed generally cannot be too high; the permanent magnet generator has no excitation winding, no carbon brushes, and no collector ring. The motor speed can be designed to be very high. The power of the generator is proportional to its speed, so the permanent magnet generator can output more power under the same volume, and the permanent magnet generator is small.

5. High-efficiency permanent magnet generator with high efficiency

The permanent magnet generator is inlaid with rare earth permanent magnet materials in the rotor core, which is used to generate the main magnetic field of the generator. It eliminates the need for excitation windings and excitation control systems, and no longer requires an external power supply for excitation. Therefore, the high-efficiency permanent magnet generator generates electricity more efficiently than electric excitation. The machine efficiency is more than 10% higher.

6. High-efficiency permanent magnet generator with high reliability

Because the permanent magnet generator does not have an excitation winding, it eliminates the collector ring, carbon brush device, and excitation control part. Therefore, the permanent magnet generator has high reliability and compact structure, is small in size, and is lightweight.

7. High-efficiency permanent magnet generators can be easily used in electric motors

The permanent magnet has a strong magnetic field on the rotor of the permanent magnet generator, so this motor can be easily operated as a motor and is especially suitable as a test motor. When the equipment under test drags the motor to run, the motor can emit electric energy. At this time, the motor provides a load torque to the equipment under test, and the torque characteristics of the equipment under test can be detected; when the equipment under test needs to be driven to rotate by other power When the motor acts as a motor to drag the equipment under test to run, the braking performance, sliding condition, moment of inertia, back electromotive force and other parameters of the equipment under test can be tested. When the motor operates as a motor, it has smooth and continuous step-less speed regulation and starting torque. It has the characteristics of large, small starting current, high speed, and can use alternating current or direct current.

8. High-efficiency permanent magnet generator has strong adaptability

High-efficiency permanent magnet generators have high specific power, high efficiency, high speed, high reliability, less heat generation, lightweight, simple structure, small size, and can be easily operated as motors, especially suitable for special occasions such as aerospace, military, vehicles, test equipment, etc.

Boost your business with our high quality services

Ask For A Quick Quote

We will contact you within 1 working day, please pay more attention to the email.