Features Applications ■ Dual torque outputs ■ Column drive steering systems ■ Non-contacting sensor technology ■ Rack drive steering systems ■ Production proven design ■ Pinion drive steering systems ■ Electronic calibration ■ ±4 ° to ±10 ° torque angle ranges available ■ Self-diagnostics and diagnostic output Non-Contacting Torque Sensor for Electric Power Steering with Parallel Outputs Introduction Bourns® Torque Sensors offer non-contacting solutions for column, rack and pinion drive electric power steering systems. Based on production proven technology, Bourns® Torque Sensors meet the full range of steering system design requirements including resolution, accuracy, and repeatability. Simple installation and electronic calibration ensure efficient and accurate system integration. Dual parallel slope outputs facilitate system interface and together with sensor self-diagnostics, provide enhanced system reliability. Electrical Specifications1 Operating Voltage ..............................................5.0 vdc ±0.5 vdc Output Voltage .................................... Analog ratiometric, PWM Torque Angle Accuracy (includes Linearity) ..................................................1 % of FS2 Torque Angle Resolution ........................................ 0.02 % of FS Electrical/Magnetic Hysteresis ................................. 0.1 % of FS Sensor Power Current Draw........................................... < 10 mA Source Current, 10 kΩ Load ............................................ ≤ 1 mA Mechanical Specifications Mechanical Hysteresis .......................................................... N/A Torque Angular Range ............................................. ±4 ° to ±10 ° Total Angular Travel ............................................... ±720 ° typical Environmental Specifications Operating Temperature Range ..........................-40 °C to +65 °C Storage Temperature Range ........................... -40 °C to +85 °C3 Dither Life @ 25 °C ...........................................3.5 million @ ±5 ° Life @ -40 °C to +65 °C .......................................2 million ±360 ° 1 Each output. 2 Preliminary. 3 Column drive systems. Contact Bourns for rack drive and pinion drive systems requiring a +125°C temperature range. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. Performance4 EPS Torque Sensor with Dual Parallel Outputs 100 T1 T2 80 60 40 20 0 -20 0 20 60 80 100 120 Torque Angle (% of Range) T1 T2 4 Typical performance for a torque angle range of ±4.5 °. Each output has a common source. Non-Contacting Torque Sensor for Electric Power Steering with Parallel Outputs Product Dimensions Dimensions and specifications shown are typical. Sensor wire harness supplied with customer-specified sealing grommet and electrical connector. The Bourns® Torque Sensor can be mechanically and electrically modified to meet the customer’s specific packaging requirements. Please contact Bourns with your application requirements. 80 21 DIMENSIONS: MM Europe: Bourns Sensors GmbH Robert-Bosch-Str. 14 D-82054 Sauerlach Phone: +49 (0) 8104 646-0 The Americas: Bourns, Inc. 1660 N. Opdyke Road, Ste. 200 Auburn Hills, MI 48326-2655 USA Phone: +1 248 926-4088 Asia: Bourns, Inc. 10F, No. 146, Sung Jiang Road Taipei, Taiwan, 104 PRC Phone: +886 2 2562-4117 www.bourns.com [email protected] 04/11 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications.