Design News, March 2013

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Mechatronics in the marketplace Corrosion-resistant PreCision Ball Bearings Applications include thermal processes, chemical processing, and hydraulic pumps AST Bearings LLC now offers a range of solutions allowing precision ball bearings to withstand harsh environments, including exposure to moisture, chemicals, high temperatures, and vacuum conditions. Among the options available are stainless-steel (AISI, 440C, AISI 304, SV30) rings and balls, balls made of silicon nitride or titanium-carbidecoated steel, rings specially coated with thin dense chromium (TDC), and special seals, retainer materials, and lubricants. Applications for these enhanced bearings include thermal processes, chemical processing, hydraulic pumps, vacuum environments, fuel pumps, and pharmaceutical and food processing. AST Bearings LLC HigH Power resistors target HeVs Optimized design reduces field failures caused by surge currents in high-power applications TT electronics' WPRT Series of Wirewound Power Radial Terminal Resistors are qualified to AEC-Q200 and designed to address the specific requirements of highpower applications including hybrid electric vehicles (HEVs). This new resistor family is constructed from a high purity ceramic rod with force-fit end-caps, over which is wound a wire element. This is then placed within a ceramic case using fireproof insulation cement. As a result, the resistors are totally flameproof under specified temperature and overload conditions. The unique design has been optimized for its surge performance, making it useful for electric vehicles and motor drives. Manufactured to the highest tolerance, the WPRT Series also improves assembly, as it fits perfectly into automotive protective moldings. The WPRT Series can be used in HEV pre-charge and BDU discharge applications, as well as protecting motors from inrush current. Its surge-protection design means it is also suitable for UPS systems. The range comprises six power ratings; from 10W to 50W, with a maximum of 250W overload withstand for the WPRT50 (50W) range. Availability conforms to E24 standard resistor values. TT electronics H6-DiMensional Motion sensor Can be used in transportation, motion, and industrial applications Honeywell's Inertial Measurement Unit (IMU), 6-D Motion Variant, 6DF Series is designed to provide motion, position, and navigational sensing from a durable single device over six degrees of freedom. The six degrees of freedom are achieved by using MEMS (microelectromechanical system) technology to sense translational movement in three perpendicular axes (surge, heave, sway) and rotational movement about three perpendicular axes (roll, pitch, yaw). Because the movement and rotation along the three axes are independent of each other, such motion is said to have "six degrees of freedom." The 6DF Series IMU measures the motion of the equipment onto which it is attached and delivers the data to the equipment's control module using an industry-standard CAN SAE J1939 communications protocol. This capability allows the equipment operator to focus on other functions, enabling more precise control than can be achieved by using only the human eye, thus increasing safety, stability, and productivity. Honeywell Design News | march 2013 | www.d esign n –M12–

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