用于 Encap 马达公司的主轴电动机 Spindle Motors for Encap Motors Corporation 生产一个磁盘驱动器的主轴电动机，怎样提高的效率，减小和降低噪音跟减少产品的成本一样重要？

How do you make a disk drive’s spindle motor significantly more efficient, smaller and whisper quiet as well as dramatically reduce production costs?

按照 Encap 马达公司，将 Konduit 和工程塑料和附加的热传导混合物一起封装。Encap又选择了聚苯硫醚（PPS）树脂和陶瓷填充，作为他们的设计。

According to Encap Motors Corporation, you encapsulate it with Konduit., composites of engineering thermoplastics and thermally conductive additives. For their designs, Encap selected a polyphenylene sulfide (PPS) resin and a ceramic filler.

直到 Konduit 合成物，封装发动机或其他非填充热塑性塑料卷曲系统或绝缘密封材料显示出有限的成功。而对于启动器，这样的绝缘材料会导致发动机无法承受运转变热。甚至更加坏的是在发动机内，他们的热膨胀性能不能与电缆和其他材料很好的匹配。于是发动机热度上升，在发动机内绝缘密封材料比其他材料膨胀更大，导致电缆的早期破损和设备失效。

Until Konduit composites, encapsulating motors or other coil wound systems with unfilled thermoplastics or nonconductive encapsulants showed limited success. For starters, such materials are insulating, causing the motors to run unacceptably hot. Even worse, their thermal expansion properties are a poor match for wire and other materials in the motor. So as the motor heats up, the nonconductive encapsulants expand more than the materials in the motor, causing premature breakage of the wire and failure of the device.

相反，Konduit 合成物，比传统非填充热塑性塑料的热传导率大 10 到 50 倍，能帮助驱散热量从主轴发动机到基础盘。这样能使发动机运转效率达到了最高。并且，Konduit 的线形热膨胀系数能和其他材料匹配，如：铜，铁和铝，消除了由于热膨胀而导致的电缆的早期破损和设备失效。

Conversely, Konduit composites, with thermal conductivity ten to 50 times greater than traditional unfilled thermoplastics, help dissipate heat from the spindle motor to the base plate. As result, the motor runs at peak efficiency. What’s more, the CLTEs of Konduit composites can be matched to materials like copper, steel and aluminum, virtually eliminating premature device failure due to thermal expansion.

另外，Konduit 生产的产品能减少数量和改善复杂部件的重大设计。特别是，柔韧电路，焊接，绝缘电缆和绝缘固定片－零部件整合－都被消除了，降低了 30％的生产成本。降低了噪音的等级，而且 Konduit合成物通过了磁盘驱动器工业严格的清洁和除气测试。

In addition, Konduit makes it possible to reduce the number and complexity of parts for significant design improvements. Specifically, the flexible circuits, solder, wire insulator and stator insulator—and assembly of these components—are eliminated, resulting in a 30% cost reduction. Noise levels are significantly reduced. And Konduit composites pass the disk drive industry’s stringent tests for cleanliness and outgassing.

所有这些都是一种革新的主轴电动机产品。你能说，这把磁盘驱动器设计带到了一个完全崭新的领域。

All of which makes for a revolutionary new breed of spindle motor. You could say it puts a whole new spin on disk drive design.

Encap 主轴电动机选择 Konduit 的优势 减小了热量的上升/提高了效率 与许多金属的线形热膨胀系数接近 降低了 30%的生产成本 成分减小化/巩固 降低了噪音

Benefits of Konduit. Composites in Encap Spindle Motors Reduces thermal rise/increased efficiency CLTEs comparable to many metals 30% reduction in production costs Component downsizing/consolidation Noise reduction

A GE Plastics Company

东莞市明聚塑胶有限公司 中堂镇北潢公路吴家涌路口 523220 电话：0769-8181396 传真：0769-8182580 www.mingjuplastics.com

Case History

Konduit TM

性能 Property 单位 Units

聚苯硫醚为基材/ PPS-Based KonduitTM

物理性能 Physical 比重 Specific Gravity - 2.25 机械性能 Mechanical 拉伸强度 Tensile Strength Psi 7,600 拉伸延伸率 Tensile Elongation % 0.5 弯曲强度 Flexural Strength psi 11,600 弯曲模量 Flexural Modulus psi 2,150,000 缺口悬梁式冲击 Notched Izod Impact ft-lb/in 0.3 热性能 Thermal HDT @ 264 psi HDT @ 264 psi ℃ 260 热导电率 Theraml Conductivity Through Plane W/mK 1.0 热导电率 Thermal Conductivity In Plane W/mK 1.0 电性能 Electrical 绝缘强度 Dielectric Strength volts/mil 299 绝缘常数@ 60Hz Dielectric Constant @ 60Hz - 4.99 抗 Arc Arc Resistance sec 207 分散因数@ 60Hz Dissipation Factor @ 60Hz - 0.0092 表面电阻 Surface Resistivity Ohms/sq 1014-16

产品代码：第一个字母（基础树脂）：O=聚苯硫醚，M=聚丙烯，P=尼龙 6 Product Codes:Firter Letter(base resin):O=PPS,M=PP,P=Nylon 6 第二个字母（主要填充物）：T=热填充 Second Letter (primary filler): T=Thermal Filler 第三个字母（次要填充物）：F=玻璃纤维增强 Third Letter(secondary filler): F=Glass Fiber Reinforcement

线形热膨胀系数(in/in/℉×10-6)

钢铁 Steels 铜 Copper 基于聚苯硫醚的 Konduit PPS-Based Konduit 铝 Aluminum 聚对苯二甲酸乙二醇醚玻纤填充 PET Glass Filled 聚苯硫醚玻纤填充 PPS Glass Filled 尼龙玻纤填充 Nylon Glass Filled 环氧玻纤填充 Epoxy Glass Filled

热传导率（Wm/K）

聚丙烯（0.2） PP(0.2) 尼龙（0.24） Nylon(0.24) 聚苯硫醚（0.3） PPS(0.3) 环氧（0.75） Epoxy(0.75) Konduit（1-10）* Konduit(1-10)*

CLTE(in/in/℉×10-6)

0 5 10 15 20 25 30 35 40

Thermal Conduc

0 0.25 .5 .75 1

tivity (Wm/K)

.2 .3 .4 5 6 .7 8 9 10

注释： Note: *实际的数值依赖于基础树脂和填充物。 * Actual figure dependent on base resin and filler. 以上资料只供参考用途。 The information are intended as a general guide only.