Custom Rare Earth Neodymium Magnets for Wind Turbine Generator

A wind turbine is a device that converts the wind’s kinetic energy into electrical power. And the core element is wind turbine generator. The generators used permanent magnet are called permanent magnet generator. Because they rely on the high magnetic field generated by a permanent magnet to convert mechanical energy into electrical power.

The wind industry prefers permanent magnet. This magnet is also a type of rare earth magnet made of expensive rare earth elements. They are worth the expense because there is no need for external power source to initiate a magnetic field in the PM generator. This is an advantage for wind farms in remote locations. The self-excitation also means a bank of batteries or capacitors for other functions can be smaller.

The permanent magnets are usually mounted on a rotor. Some rare earth magnets are also mounted on the stator and let the coils rotate.

Permanent Magnet Selection for Wind Turbine

Some factors need to be assessed in choosing the permanent magnet for wind turbine. So it’s critical to understand the characteristics of magnet materials, different sizes and shapes.

There are four classes of commercialized magnets used today. And each has its own magnetic properties. They are Alnico, Ceramic, Samarium Cobalt and Neodymium Iron Boron magnet.

Since NdFeB magnet is the strongest magnet at room temperature of all of the magnetic materials. And it offers high flux density operation and the ability to resist demagnetization. Generators in many of the newest turbines have started using neodymium magnets.

Ferrite magnet is the cheapest magnet with low magnetic force. So sometimes wind turbine manufacturer probably change ferite to rare earth magnets.

Both smco and alnico magnets can work under high temperature. But samarium cobalt has higher magnetic field.

Another factor that needs to be considered is the shape and size of the magnet. We provide permanent magnets for wind turbine generator with various shapes and sizes.

Magnet Grade	42, N48, N50, N38SH, N42SH, N48SH to N35SHT
Magnet Coating	Ni-Cu-Ni triple plated, Zn, black epoxy coated etc.
Magnet Shape	segment, rectangular blocks, wedge, and trapezoid etc.
Regular Size	2″ x 1″ x 3/8″, 2″ x 1″ x 1/2″, 2″ x 1″ x 1″ , 4″ x 2″ x 1″, 240x80x40mm, 70x50x25mm, 90x35x30mm

Rare Earth Magnet Manufacturer for Wind Turbine

China Magnets Source Material Limited is able to manufacture different kinds of high performance permanent magnets for wind turbine generator. Nowadays, the step-up gearboxes are being increasingly replaced with variable speed generators, increasing the demand for magnetic materials in wind turbines. So if you need rare earth magnets in wind turbines, please feel free to contact us.