China maps a wind turbine future without rare earth magnets

Equally Dongfang Electric and also XEMC, which are usually among China’s five largest turbine suppliers, will offer direct-drive equipment without magnets with their Chinese customers subsequent year, they notify Recharge.

“We have done the R&D [research and development] and testing inside our factory. Next calendar month, we will finish the initial prototype and test that on a wind flow farm, ” claims Song Xiaoping, key engineer at XEMC.

XEMC provides, until now, marketed permanent-magnet direct-drive mills.

The new 2MW product, using electrical excitation as opposed to magnets to commence the turbine, should go on sale inside 2012, says Track.

Dongfang’s 2. 5MW electrical-excitation direct-drive model will probably be ready by the conclusion of the yr, says Chen Team, vice-general manager on the company’s New Vitality equipment business product.

The adoption regarding alternative technology comes after the expense of magnets rocketed earlier in 2010, following a surge in the price tag on neodymium and dysprosium.

Neodymium hit a peak of 1. 79m yuan ($280, 000) every tonne in May well, up from 330, 000 yuan inside January. Magnets made up of the metal increased from about 65 yuan every piece to 350 yuan, in accordance with Shi Ran, a great analyst at Cina International Capital Firm (CICC). Goldwind, the particular world’s largest manufacturer of permanent magnet direct-drive mills, uses 4, 000 magnets pieces in each and every 1. 5MW equipment.

Prices of the particular rare earths have got since dropped, but magnets are already more resilient because of the added value, claims Melvin Hill, a great analyst at Cookware Metal in Beijing.

XEMC and Dongfang count almost entirely around the Chinese market, where turbine prices are already falling for no less than the past 36 months. They dropped simply by about 20% inside the first half with this year to an average of 3, 588 yuan every kW.
Electrically excited synchronous generators already are offered by In german turbine maker Enercon. The technology utilizes copper coils that induce a magnetic field each time a current is activated. Copper coils were a pricey option until rare-earth magnets prices soared, but have become comparatively cheaper.

Chen believes copper prices tend to be transparent than people of rare earths. He adds in which Dongfang is “fully capable” regarding developing the technology in-house for the 2. 5MW product.

Both companies will continue to offer the permanent-magnet direct-drive turbines with a higher price compared to the new designs.
“It is dependent upon the requirements individuals customers, ” claims Song. “For the particular Europeans, they choose the permanent-magnet direct-drive, but we have to consider the Oriental market. It can be a special market together with low prices. ”
XEMC has recently had to increase prices in 2010. Song adds the company wants to keep a direct-drive expert, as it feels the technology has advantages inside the offshore market. XEMC installed any prototype of the 5MW offshore turbine inside the Dutch province regarding North Holland inside June.

Growth inside the offshore market is anticipated to drive significant requirement for direct-drive turbines as a result of their lower maintenance needs relative to geared machines. Forecasts suggest usage of the technology can grow by 18% annually to 2020.
The impact regarding soaring rare-earth prices continues to be felt predominantly simply by Chinese turbine suppliers, which were the initial to enter mass production with the technology, notes Charlie Sawyer, secretary-general with the Global Wind Vitality Council, at any press briefing inside Beijing.

While companies which includes Siemens and GE are suffering from permanent-magnet direct-drive wind turbine models, they never have yet sold huge quantities.

“The price regarding rare earths can hurt the Chinese competitors greater than anyone else, and also especially Goldwind, ” claims Sawyer.

In Come july 1st, CICC analysts Chen Hua and also Shi Ran estimated the higher magnet rates would add 500 yuan/kW to the expense of a typical Goldwind 1. 5MW turbine and reduce the company’s gross perimeter from 20% a year ago to less than 13% in 2010.

However, China’s second-­largest wind turbine maker also produced a 3MW “hybrid” prototype — which usually uses half the magnets with the company’s permanent-magnet direct-drive machine — in ’09. It could opt to bring the equipment into commercial creation if magnet rates stay high, point out other analysts.

Yinhe Windpower, any newcomer in Cina, is also contemplating replacing permanent magnets, but a swap in technology would only be described as a last resort, claims managing director Lars Andreasen.