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Magnetic Stator of Linear Motor

• Magnet is also widely usd in the stator of motors, like linear motor and voice coil motor(VCM). Our design and assembly technologies can fit to customers' intergration system, providing stable and homogeneous magnetic flux
• There are mang hiden technologies in the stator assembly of  linear motor. With similar cost, our assembly experience and documented technology specification will make high reliability happen, flat  and shining appereance, perfect gluing effect without overflow, even flux distribution,etc

             Magnetic Flux Analysis

  The factors that may determine the efficiency and cost of Linear Motor

      1.   Magnet

• N, M, H, SH, EH, AH series NdFeB magnet, AH has the highest coercivity(Hcj) and working temperature,  which is determined by element Dy. The price of Dy is 4 times of Nd, so unless necessary, please use magnets as low coercivity as possible(like N or H or SH)

• Price among N, M, H is only 3%, while 10%~15% between SH and H. Thus if the magnet is chose to be over SH grade, it would be very expensive

• The thickness of the rectangular magnet is better to be bigger than 1mm, otherwise the non-conforming rate is high.

• Usually ¡Ó0.1 for L and W, ¡Ó0.05 for Thickness

• Surface treatment: price of NiCuNi is 1.5 times as Zn, while NiCuNi+epoxy is 2 times as NiCuNi

      2.   Steel Part

• It¡¦s often to buy steel plate in the market of 1, 2, 3, 4 5, 6, 8, 12, 15mm, so please try to make your design closer to those, for instance, the thickness 8.2mm is much more expensive than 7.8mm. since to machining 8.2mm ,we have to use 12mm thickness plate, but for 7.8mm, 8mm plate is far enough

• Roughness: normally RA6.3 for the gluing surface and RA3.2 for others. If it¡¦s required to reach 1.6, we have to grind the surface, which means higher cost

• Please try to avoid the tolerance which is stricter than ¡Ó0.01mm

• Surface treatment: Oxidation(USD1~1.5/kg), Zn(USD1.5~2/kg), NiCuNi(USD3~4/kg), NiCuNi+epoxy(USD4~6/kg)

• Usually  1.0114(German)/Q235(China)/A283A(US)

        3.   Assembly:

• Cost of glue

• Labor cost: it¡¦s not very precise to calculate.

An example here:

• Magnet: 48H

• Tolerance of magnet, L¡Ó0.1  x  W¡Ó0.1  x  T¡Ó0.05

• Material of steel part: Q235, 5mm thickness

• Plating: NiCuNi for both magnet and steel part

Type 1: USD200/meter

      Type 2: USD300/meter

      Type 3: USD420/meter