Recently, the 26th China Refrigeration Exhibition has been held in Shanghai New International Exhibition Center. In this exhibition, Gree Electric Appliance Inc, the top air-conditioner brand, promoted numerous refrigeration air-conditioners, which stunned the audience. Among those products, permanent magnetic frequency heat pump centrifuge is the most impressive and amazing one to experts. Based on technology of PM synchronous frequency centrifuge, it is designed and manufactured for working condition of heat pumps. This technology represents as developmental direction of central air-conditioners.
Research of synchronous motors has been conducted for a long time. In order to realize energy conversion, motors are in need of direct current magnetic fields, which can be produced by permanent magnet materials.
As is known to all, air-conditioning systems of large public buildings are high energy consuming with great potential of energy conservation. Large public buildings increase by 3000 to 4000 square meters every year in our country. Therefore, energy conservation of construction attracts much attention. In recent years, many manufacturers have conducted active researches around cold water chillers, made big progress and improved performance of chillers to different extent. Also, permanent magnetic synchronous frequent centrifugal machines highlight its energy conservation, reliability and adaptability, which are superior when employed in large office buildings, hospitals, schools and shopping malls. When temperature reaches a certain degree, power capability of PM synchronous motors will become smaller, which can save energy and circulate in compress refrigeration.
Not only are permanent magnetic synchronous motors used in filed of air conditioners, but they are applied to rail transit systems. CSR Zhuzhou Electric Locomotive Co., marketed PM synchronous driving systems and traction systems. Later, permanent magnetic synchronous motors are successfully employed in electric vehicles, high-speed rail vehicles, subways and low floor vehicles. Due o small sizes, light weight, permanent magnetic synchronous have absolute advantages in power density, which are widely applied in filed of electrical vehicles, robots, air conditioners, wind power, magnetic separators and consuming electrics.
Neodymium permanent magnets are the best choice for PM synchronous motors. With high energy product, higher residual magnetism and intrinsic coercive force, neodymium magnets become main stream of a new generation of new permanent magnetic materials with high performance, which has become the best choice for magnetic steel of permanent synchronous motors in downstream applications. Besides iron in magnets, neodymium, dysprosium and terbium are added as well.
China Rare Earth Magnet Limited
Tags: Permanent Magnet
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