Advantages of Permanent Magnet Alternator

Permanent magnet alternator is also called direct drive permanent magnet synchronous generator.

 

Direct drive, the most direct meaning is direct drive, is a new type of motor directly combined with the movement of the executive part, that is, the motor directly drives the machine to run, there is no intermediate mechanical transmission link, direct drive with the force of the generator is also known as gearless wind generator.

 

Permanent magnet, meaning that this material itself has magnetic, not magnetization, generally will not demagnetization, permanent magnet material also known as "hard magnetic material". A material that can maintain constant magnetism once magnetized, having a wide hysteresis loop, high coercivity and high remanence.

 

The direct drive permanent magnet synchronous generator is driven by the direct connection of multi-pole motor and impeller, which eliminates the traditional part of gear box and increases the number of magnetic poles so that the rated speed of the motor decreases.

 

As we all know, gearbox is the most prone to failure of wind turbine components, so the reliability of direct drive permanent magnet synchronous generator is higher than that of doubly-fed asynchronous wind generator. The impeller absorbs wind energy and converts it into mechanical energy, which is transmitted to the generator to generate electricity through the spindle. The electricity generated is connected to the network through the boost transformer after the full power converter.