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Magnetic Position Sensors

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Position sensors are sensors, which measure linear or angular position. Following the trend towards robust and intelligent sensor systems and applications ams offers a broad portfolio of non-contacting (without physical contact), hall-based and intelligent magnetic position sensors with high reliability and long functional life. With these position sensor solutions we are serving high-growth applications within the automotive (safety critical automotive applications concerning transmission, pedal, steering, chassis), consumer (home appliances), industrial (manufacturing, building and office automation, medical) and robotics markets.

We offer our customers and potential customers more than just a product. Our value proposition supports high-performance, superior durability, adherence to the most stringent safety requirements, and best-in class stray field immunity. Based on our differential principle (patented technology) all ams magnetic position sensors can withstand external magnetic stray fields above the limits required by the most demanding OEM’s. This is growing increasingly in importance, especially in the automotive arena as the drivetrain of vehicles becomes partially or wholly electrified, the environment becomes more electromagnetically and mechanically harsh, and new standards such as ISO11452-8 (immunity to magnetic fields) and ISO26262 (functional safety) become adopted.

Based on the fact that rotary and linear magnetic sensor technology shows robust growth, and particular trends in the automotive industry, like the need for contactless technologies (increased need for precision & safety), improvements in reliability & precision, lower CO2 emissions requirements, cost reduction, and the increased use of brush-less (BLDC) motors favors ams. We are encouraged to put significant weight behind magnetic position sensors for applications in automotive systems. A vivid example of these automotive trends can be seen a BLDC Motor for electronic power steering (on-axis motor position sensing and control in an Electric Power Steering (EPS) system). The motor position sensor controls the commutation of a brushless DC motor employed in the system. Sophisticated position sensor ICs with multiple sensing elements on a single die enable faster and more accurate acquisition of information. Stability over temperature, robustness against tolerances and interfering field, high number of pole pairs, high speeds (up to 30.000 rpm), angle error below 1° degree, ISO26262-compliance and redundant magnetic position sensors eliminating the concern of “loss of assist” make an ams position sensor the leading solution for automobile EPS systems.

Publicada em: Tecnologia
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Magnetic Position Sensors

  1. 1. Confidential © ams AG 2015 Magnetic Position Sensing Of course, with complete stray field immunity February 2015 Heinz Oyrer Senior Manager Global Marketing Business Line Position Sensors
  2. 2. Confidential © ams AG 2015 Page 2 Focus • Designing and manufacturing advanced analog sensor solutions • Markets: communications, consumer, industrial, automotive and medical • Solutions: intelligent light sensors, RFID/NFC, chemical sensors, active-noise- cancelling ICs, position sensors, ultra-low power management, and more • Standard products & custom solutions (ASICs & foundry services) People: • More than 1,700 employees in 20 countries • 12 design centers • 20 sales offices • 30 channel partners Manufacturing • IDM with 30+ years of experience • Advanced processes: CMOS, HV-CMOS and SiGe, 3D TSV • Certified for automotive & medical production • Full service foundry including packaging and testing options • 8 inch wafer fab in Austria (155k wspa) • Test facility in Calamba, Philippines • Strong relationships with global manufacturing partners Financials • Revenues 2014 EUR464m/$614m (2013: EUR378m/$502m) • Revenues Q4 2014 EUR139m/$174m (Q4 2013: EUR103m/$141m) About ams Shaping the world with sensor solutions
  3. 3. Confidential © ams AG 2015 Page 3 World of Sensors Providing a seamless human-machine interface for a richer and more intuitive user experience Communications & Consumer • Ambient light, color & proximity sensing • Gesture recognition • NFC based contactless payment solutions • Active noise cancellation • Power management solutions • Safety systems • Battery management • Position sensing • Comfort & chassis sensors • Advanced driver assistance Environment • Lightning sensors • Gas sensors • Seismic analysis • Temperature sensors • Day light harvesting Industrial • Industrial/building automation • Motion control • Heat, Ventilation & Air conditioning (HVAC)) • Position sensing • Digital x-ray • Computed Tomography • Surgical Robots • Diagnostic equipment Medical Automotive Health/Fitness • Diabetes management • Heart rate monitors • Medication tracking • Activity trackers
  4. 4. Confidential © ams AG 2015 Page 4 We envision enriching lives by improving safety, enhancing energy efficiency, and increasing user convenience. Becoming market leader with position sensor solutions. We create value for our customer by solving their system and application problems with our superior technical expertise and support in position sensing. ams Position Sensors – at a Glance Vision, mission, strategy
  5. 5. Confidential © ams AG 2015 Page 5 Position sensors are sensors, which measure linear or angular position. Following the trend towards robust and intelligent sensor systems and applications ams offers a broad portfolio of non-contacting (without physical contact), hall-based and intelligent magnetic position sensors with high reliability and long functional life. With these position sensor solutions we are serving high-growth applications within the automotive (safety critical automotive applications concerning transmission, pedal, steering, chassis), consumer (home appliances), industrial (manufacturing, building and office automation, medical) and robotics markets. ams Position Sensors – at a Glance Systems and markets
  6. 6. Confidential © ams AG 2015 Page 6 We offer our customers and potential customers more than just a product. Our value proposition supports high-performance, superior durability, adherence to the most stringent safety requirements, and best-in class stray field immunity. Based on our differential principle (patented technology) all ams magnetic position sensors can withstand external magnetic stray fields above the limits required by the most demanding OEM’s. This is growing increasingly in importance, especially in the automotive arena as the drivetrain of vehicles becomes partially or wholly electrified, the environment becomes more electromagnetically and mechanically harsh, and new standards such as ISO11452-8 (immunity to magnetic fields) and ISO26262 (functional safety) become adopted. ams Position Sensors – at a Glance Offering
  7. 7. Confidential © ams AG 2015 Page 7 Rotary and linear magnetic sensor technology shows robust growth, and particular trends in the automotive industry. The need for contactless technologies (increased need for precision & safety), improvements in reliability & precision, lower CO2 emissions requirements, cost reduction, and the increased use of brush-less (BLDC) motors favors ams. Therefore we are encouraged to put significant weight behind magnetic position sensors for applications in automotive systems ams Position Sensors – at a Glance Automotive
  8. 8. Confidential © ams AG 2014 Agenda Value proposition Introduction to position sensing Why magnetic position sensors Target markets and selected applications Technology Product portfolio Innovation, quality, safety and support
  9. 9. Confidential © ams AG 2015 Page 9 Value Proposition Magnetic Position Sensors Best-in class stray field immunity High-performance, superior durability Adherence to the most stringent safety requirements Comprehensive customer support • Industry-leading robustness against unwanted magnetic stray fields, vibration, and misalignment facilitated by the use of a patented differential sensor technology. • Ultra-high precision to ensure system reliability • Designed to meet the most challenging demands of safety critical applications – own automotive qualified fab • Knowledge and technology resources, along with a close working relationship, to develop and deliver what the customer needs www.ams.com/magnetic-position-sensors
  10. 10. Confidential © ams AG 2015 Page 10 Sensors which measure linear or angular position • Contacting: through a mechanical connection • Non-contacting: without physical contact Non-contacting position sensors are • More reliable • Offer a longer functional life due to the absence of mechanical parts and physical contact Strong trend • From simple angle and distance sensors towards robust, intelligent sensor systems and applications with multiple simultaneous measurement axes. ams position sensors • Non-contacting, hall-based and intelligent magnetic position sensors ! What are position sensors? Non-contacting position sensors
  11. 11. Confidential © ams AG 2015 Page 11 CAGR position sensing technology 2013 - 2018 Market split 2018 CAGR position sensing by technology Rotary and linear magnetic sensor technology shows robust growth Source: Intechno 2012
  12. 12. Confidential © ams AG 2015 Page 12 Target applications Position Sensors Focus automotive applications - EPS, chassis level, transmission, throttle, acceleration pedal, brake, actuator Focus motor and motion control application, DAEC™ - automotive, automation, robotics Replace discrete solutions, optical encoder replacement, resolver replacement White goods, rotary knobs, potentiometer replacement
  13. 13. Confidential © ams AG 2015 Page 13 The need for contactless technologies • Increased need for precision & safety (i.e. ISO26262) Improvements in reliability & precision • More electronics in the car, higher precision in powertrain applications e. g. start/stop systems, powertrain hybridization, Lower CO2 emissions requirements • Better sensor performance & higher resolution, e.g. steering applications with reduced standby current and a smart “measurement on demand” Cost reduction • Sensors with new digital interfaces i.e. SENT, PSI5 with enhanced robustness/diagnostic, cost reductions for the entire signal chain Increased use of brush-less (BLDC) motors • Major advantages of brushless DC motors include higher efficiency at converting electricity into mechanical power, reduced noise, longer lifetime and higher reliability. Trends in the automotive market Position sensors
  14. 14. Confidential © ams AG 2015 Page 14 Selected automotive applications Magnetic Position Sensors Exhaust gas recirculation (EGR) Electronic Power Steering (EPS) Gearbox / Gearshifter Steering Wheel / Column Automatic-manual (AMT) / Dual-clutch transmission (DCT) Throttle (TPS) Pedals Chassis level
  15. 15. Confidential © ams AG 2015 Page 15 Magnet Electrics (AS5262) Mechanics Automotive application example Acceleration Pedal Position Sensor  Throttle control  Contactless position sensing  Precision position measurement for better control  Magnetic stray field immunity  Failure diagnostics  Fully redundant – ASIL D (according ISO26262)
  16. 16. Confidential © ams AG 2015 Page 16 Automotive application example BLDC and PMSM motor control and commutation
  17. 17. Confidential © ams AG 2015 Page 17 • Magnetic position sensing is becoming the leading solution for automobile EPS systems • Sophisticated sensor devices with multiple sensing elements on a single die enable faster and more accurate acquisition of information. • Precise position of the automobile's steering wheel, improved performance of its EPS system while keeping costs and required space to a minimum.  Stability over temperature  Robustness against tolerances  Robustness against interfering field  Up to 7 pole pairs  Up to 30.000 rpm  Angle error <1° deg  ISO26262-compliance  Redundant magnetic position sensors eliminate the concern of “Loss of Assist”. Integrated position sensing in EPS Position Sensors BLDC Rotor Position Sensor Electric Power Steering leads the steering market, EPS outperforms other markets in growth. The motor position sensor controls the commutation of a brushless DC motor employed in the system.
  18. 18. Confidential © ams AG 2015 Page 18 Automotive application example BLDC Motor for electronic power steering - on-axis motor position sensing and control
  19. 19. Confidential © ams AG 2015 Page 19 Automotive application example Chassis position sensor
  20. 20. Confidential © ams AG 2015 Page 20 • Humanoid robots • Industrial robots • Surgical robots • Security robots • … • Position sensing • Encoder module • … • Window shutter • Marquees • Doors • … • 3D printers • 3D scanner • Security cameras • … Robotics Industrial Automation Building Automation Office Automation Selected industrial applications Magnetic Position Sensors
  21. 21. Confidential © ams AG 2015 Page 21 Industrial application example Encoder module
  22. 22. Confidential © ams AG 2015 Page 22 • White goods • Washing machine • Dryer • Dishwasher • … • Volume control • Hi-Fi Audio • Car-Radio • Temperature Control • … • RC-Servo • Joystick • Toy-Robots • Pedals • … • Throttles in air condition • Window shutter • Marquees • Doors • Valves • Actuators • … Home appliances Home appliances Home appliances Building automation Selected consumer applications Magnetic Position Sensors
  23. 23. Confidential © ams AG 2015 Page 23 Consumer application example Potentiometer replacement
  24. 24. Confidential © ams AG 2015 Page 24 Angle position 3D position Off-axis position Linear position Hall-effect based magnetic position sensors
  25. 25. Confidential © ams AG 2015 Page 25 Normal operation Hall-based magnetic position sensors (1) The magnet is centered over the Hall sensors (2) The magnetic field is sinusoidal, the magnetic field strength increases linearly with radius => 1 turn = 1 sine wave (3) The differential amplifiers generate one sine and cosine signal with double amplitude (4) The Cordic transforms sine and cosine into angle and magnitude vertical magnetic field Bz characteristics       = )cos(*ˆ )sin(*ˆ arctan a a a a a )tan( )cos(*ˆ )sin(*ˆ a a a = a a
  26. 26. Confidential © ams AG 2015 Page 26 External magnetic stray fields Hall-based magnetic position sensors (1) An external magnetic field is present near the sensors (3) The offset does not influence the differential signal (2) The external magnetic field generates an offset on all sensors. (4) External magnetic fields do not influence the angle       = )cos(*ˆ )sin(*ˆ arctan a a a a a )tan( )cos(*ˆ )sin(*ˆ a a a = a a
  27. 27. Confidential © ams AG 2015 Page 27 Stray field immunity ams patented differential principle H2 H4 Hall 0 [V] Volts 1 2 3 4 external magnetic stray field Vdiff 1 = Vdiff 2 Note: … considering homogeneous external magnetic stray field
  28. 28. Confidential © ams AG 2015 Page 28 Becoming increasingly important in the automotive arena • Drivetrain of vehicles becomes partially or wholly electrified • Electromagnetically and mechanically harsh environment • New standards such as ISO11452-8 (immunity to magnetic fields) and ISO26262 (functional safety) All ams magnetic position sensors can withstand external magnetic stray fields above the limits required by the most demanding OEM’s. • Measurements show that at 3000 A/m = 3,768 mT, which is a current maximum OEM stress limit, ams does not show any output voltage drift over the 360 degree • No need for complicated and expensive magnetic shielding. • Dual-pixel sensor ICs provide a means for designers to achieve robust performance and to provide for compliance with the most exacting standards Stray field immunity Magnetic position sensors
  29. 29. Confidential © ams AG 2015 Page 29 Focus products Position Sensors • motor motion control, commutation AS5147, AS5247 • angle sensors – remote AS5161, AS5261, AS5162, AS5262 • (sin/cos) motor motion control AS5115, AS5215 • optical encoder replacement, motor control AS5047D • potentiometer replacement, rotary knobs AS5600, AS5601 • low power, R/C-Servo, robotics AS5050A, AS5055A • small, linear and off-axis special applications AS5510 (WLCSP, SOIC8) • high resolutionAS5048
  30. 30. Confidential © ams AG 2015 Page 30 Product segment matrix Magnetic Position Sensors Position measurement Motor Control Product Linear Rotary on-axis Rotary off-axis Rotary on-axis Rotary off-axis incr. abs. incr. abs. incr. abs. incr. abs. incr. abs. AS5304 | AS5306 AS5311 | NSE5310 AS5510 | AS5013   - - -  - - - - - -   - - - - - - - - - -   - - - - AS5040 | AS5045B AS5045 | AS5048 AS5050A | AS5055A AS5047D AS5600 AS5601 - - - - - - - - - - - -  - -  -        - - - - - - - - - - - -  - -  - -  - -  - - - - - - - - - - - - - - AS5132 | AS5134 AS5115 | AS5215 AS5147 | AS5247 AS5161 | AS5162 AS5261 | AS5262 - - - - - - - - - - - -  - - - -    - - - - - - - - - -    - -    - - - - - - - - - - - -  Product Portfolio − not applicable/available LinearRotary
  31. 31. Confidential © ams AG 2015 Page 31 Zero-Defect Philosophy/Culture • AEC-Q100 automotive qualification, "Safe Launch Program“, "Burn- In" and "Three-Temperature" testing procedure Functional Safety/IC Design & Development Process • Diagnosis IP, ISO conformant development, 200mm in-house wafer fab, ISO-TS16949 • Very low defect density, ID for every automotive IC, in-house ESD/EMC lab Adhering to latest Quality/Safety Standards i.e. ISO26262 • ISO26262 - track-record for cost effective implementation, development flow conformant, safety manager for ISO26262 projects • Close collaboration between IC developer and user at FMEDA, considering all diagnosis functions, IC-internal and host system Commitment to quality & safety Magnetic Position Sensing
  32. 32. Confidential © ams AG 2015 Page 32 • AEC-Q100 Automotive grade qualified • Safety flow in parallel with product development process • Safety manual certification by independent company • Safety support and manual to achieve ASIL value in different applications • FMEDA, FIT rate, application notes • Dedicated safety manager Safety according ISO26262 Magnetic Position Sensors
  33. 33. Confidential © ams AG 2015 Page 33 Tools • Evaluation tools • Programming tools • Simulation tools (3D) EMC support • IC Level EMC tests (ams internal) • System Level tests (Germany) , according selected OEM standard, magnetic stray field tests Magnetic support • Magnet scans of given magnets • Performance simulations with scanned data and selected sensor IC over mechanical displacement • Measurement magnet with sensor IC over displacement Application support Magnetic Position Sensors
  34. 34. Confidential © ams AG 2015 Page 34 Dual die solution (redundancy) Magnetic Position Sensors  Safety critical applications (ASIL-C, ASIL-D)  Stacked die technology 150degC  Separate supply pins  Superior EMC performance
  35. 35. Confidential © ams AG 2015 Page 35 Integrated Dynamic Angle Error Compensation Magnetic Position Sensors - DAEC™ - Patent published Dynamic Angle Error Hardware Compensation integrated! No Software needed! External HW + SW compensation needed MagneticPositionSensorSystem
  36. 36. Confidential © ams AG 2015 Page 36 Key for success Magnetic Position Sensing Strayfield immunity ISO26262 capability Functional safety Hardwired logic vs. firmware Interfaces flexibility Versatile power supply Stacked die package design Long strokes Usability easy- to-use Simplification, easy to program Lower intrinsic error Sensitivity wide dynamic range Lead times Support & Tools New products
  37. 37. Confidential © ams AG 2015 Page 37 Value Proposition Best-in class stray field immunity High- performance, superior durability Adherence to the most stringent safety requirements Comprehensive customer support Magnetic Position Sensors
  38. 38. Confidential © ams AG 2015 Thank you! Please visit our landing page http://www.ams.com/Magnetic-Position-Sensors

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