High Speed, High Resolution Rotary Position Sensor AS5147P
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The AS5147P is a high-resolution rotary position sensor for high speed (up to 28krpm) angle measurement over a full 360 degree range. This new position sensor is equipped with a revolutionary integrated dynamic angle error compensation (DAEC™) with almost 0 latency. The robust design of the device suppresses the influence of any homogenous external stray magnetic field. A standard 4-wire SPI serial interface allows a host microcontroller to read 14-bit absolute angle position data from the AS5147P and to program non-volatile settings without a dedicated programmer. Incremental movements are indicated on a set of ABI signals with a maximum resolution of 4096 steps / 1024 pulses per revolution. The product is defined as SEooC (Safety Element out of Context) according ISO26262 including FMEDA, safety manual and third party qualification.
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High Speed, High Resolution Rotary Position Sensor AS5147P
- 1. Confidential © ams AG 2015 High Speed High Resolution Rotary Position Sensor AS5147P
- 2. Confidential © ams AG 2015 Page 2 Product segment matrix Magnetic Position Sensors Product Click on the part # to get the datasheet Position measurement Motor Control 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 | AS5047P AS5600 AS5601 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - AS5132 | AS5134 AS5115 | AS5215 AS5147 | AS5247 AS5147P AS5161 | AS5162 AS5261 | AS5262 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - product portfolio new products − not applicable/available LinearRotary
- 3. Confidential © ams AG 2015 Page 3 Internal Comparison / Improvements AS5147P AS5147 AS5147P Core Resolution [bit] 14 14 Maximum speed [rpm] 14.500 28.000 Encoder resolution [bit / deg] 11 / 0.18 12/ 0.09 Encoder pulses max. 512 (bin) max. 1024 (bin) INL [deg] +-1 +-1 Noise [deg rms] 0.06 0.06 System propagation delay [us] Output readout rate at SPI 1.9* 1.9* DAE @1.7/14.5k/28k rpm 0.02*/0.17* 0.02*/0.17*/0.35* Output interfaces SPI, PWM ABI, UVW SPI, PWM ABI, UVW ISO26262 conform No SEooC according ISO26262 * DAEC™ … Dynamic Angle Error Compensation
- 4. Product Overview / Key Features AS5147P Benefits • Easy to use – Low latency & High refresh Rate • Lower system costs (no shielding) • High resolution for motor & position control • Simple replacement – reduce system cost • Fast high resolution position feedback • Provides absolute & incremental angle measurements • Supports safety challenging applications Key features • DAEC™ Dynamic Angle Error Compensation • Immune to external stray magnetic fields • 14-bit core resolution • Encoder output: 1000 / 1024 pulses • Maximum speed up to 28.000 rpm • SPI, PWM, UVW and ABI Interfaces • SEooC according ISO26262 • AEC-Q100 qualified Applications • Electric Power Steering (EPS) • Gearbox and Brake Actuator • Starter & Alternator and Pump Motor • BLDC/PMSM motor commutation • Rotary position sensors
- 5. Confidential © ams AG 2015 Page 5 AS5147P - (“SEooC”) according ISO26262 Safety element out of context ISO26262 SEooC flow: Product developed with assumed safety goal / ASIL level - Safety Analysis of the architecture - Sensor development in adherence to ISO26262 - User Guide: Safety Manual to achieve ASIL - Development process evidence - PPAP - Safety Plan - Certifications - Certification by independent certification company - Safety support - Customer refined FMEDA - FIT Rate - Safety Manual - Pin-FMEA Document - Application Notes - Support concept phase at customer - Support integration at customer Certified by independent ISO 26262 certification company SEooC according ISO 26262 to support ASIL Level X FMEDA FIT Calculation Safety Manual Fully qualified sensor AEC Q-100 Grade0 Sensor developed with Safety Goals
- 6. Confidential © ams AG 2015 Page 6 DAEC™ - A Revolutionary solution AS5147P - Integrated Dynamic Angle Error Compensation™(DAEC™)– patent published Dynamic Angle Error Hardware Compensation integrated! No Software needed! External HW + SW compensation needed MagneticPositionSensorSystem MPS … Magnetic Position Sensor
- 7. Confidential © ams AG 2015 Page 7 DAEC Dynamic Angle Error Compensation AS5147P benefits No DAEC: Error increases with rpm! DAEC reduces the error to almost zero! Low Latency High Output refresh rate No DAEC: slow refresh rate - additional error DAEC: Correct angle at correct time! Competition AS5147P Control loop Error High output refresh rate !
- 8. Confidential © ams AG 2015 Page 8 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
- 9. Confidential © ams AG 2015 Page 9 AS5147P Application Example for EPS Torque measurement, hand wheel, and motor position and control AS5147P - Motor position sensor (On-Axis) Fast digital Interfaces; SPI, ABI, UVW, and PWM Accuracy ≤ 1.0o; with 14 bits resolution Max RPM up to 28K Fast refresh rates/low latency; 1.9 µs Torque and hand wheel Sensor unit [TAS] EPS Motor Motor position sensor IC controls commutation of brushless DC motor. Torque sensing requirements [TOS] Hand wheel position requirements [SAS] (On-Axis or Off-Axis)
- 10. Confidential © ams AG 2015 Page 10 • Commutation feedback for brushless DC motor • Provides fast and accurate measurements At startup: provides phase coil information via UVW signals At speed: provides position measurement via SPI or ABI signals • Eliminates the need for discrete hall sensors in stator AS5147P Enables Efficient Motor Commutation Brushless DC (BLDC) Motor - preferred choice for EPS
- 11. Confidential © ams AG 2015 Page 11 AS5147P Technical Advantages Advanced magnetic position sensors in Electronic Power Steering (EPS) applications Superior durability through contactless “system-on-chip” solution No wear High reliability Insensitive to humidity, dust, dirt, etc. Lower Systems Cost Small surface mount Wide mechanical tolerances reduce manufacturing costs End-of-Line Sensor Programming for lower production costs High Accuracy Rotary position error accuracy of < ±1.0o
- 12. Confidential © ams AG 2015 Page 12 AS5147P Technical Advantages (Cont.) Advanced magnetic position sensors in Electronic Power Steering (EPS) applications DAEC Low latency High refresh rate Increased Functional safety via on-sensor diagnostics Enabler for safety critical applications (ISO26262 safety standard)
- 13. Confidential © ams AG 2015 Page 13 Competitive Product Positioning AS5147P Angular Position Sensor AS5147P Competitive ICs Provides ultra-low latency, very fast output refresh rates, stray field immunity, and high accuracy performance, while reducing system costs and enabling improved ISO 26262 system safety compliance. Provides ultra-low latency, fast output refresh rates, stray field immunity, and high accuracy performance, while enabling reduced system costs. AS5147P vs Competitive ICs AS5147P vs Discrete Sensors Angular Position Sensor AS5147P Discrete Sensors
- 14. Confidential © ams AG 2015 Page 14 Competitive Positioning against Competitive IC Solutions AS5147P The AS5147P rotary position sensor IC provides ultra-low latency, superfast output refresh rates and high accuracy performance at reduced system costs. Angular Position Sensor AS5147P Competitive ICs Unlike competitive rotary position sensors ICs, the AS5417P. Is immune to stray magnetic fields for improved performance and lower system costs (no shielding required) Has ultra-low intrinsic propagation delay and noise for better accuracy performance Provides an extremely fast output refresh rate of just 1.9usecs Supports very high speed rotational shaft applications Provides sub +/-1.0o angle measurement accuracy over temperature Requires a smaller target magnet for lower system costs Is packaged in a low profile (1.0mm nom) height TSSOP-14. Provides robust customer configurability, including zero-position location, for end-of-line programming
- 15. Confidential © ams AG 2015 Page 15 Competitive Positioning Against Discrete Solutions AS5147P Provides ultra-low latency, stray field immunity, and high accuracy performance, while reducing system costs and enabling improved ISO 26262 system safety compliance. Unlike discrete motor commutation solutions, the AS5147P. Provides high speed motor position information and motor commutation feedback in a single device. Enables higher levels of ISO 26262 system safety compliance. Has lower system costs with elimination of discrete Hall switches Is immune to stray magnetic fields for improved performance and lower system costs (no shielding required) Is singularly packaged in a low profile (1.0mm nom) height TSSOP-14. Angular Position Sensor AS5147P Discrete Solutions
- 16. Confidential © ams AG 2015 Page 16 • AS5147P-TS_EK_AB SAP#: 990600830 • AS5147P-TS-EK-MB SAP# 990600xxx • USB I&P BOX SAP# 990600795 • SD4Y-EK-XX-PB SAP# 990600763 Adapter Board AS5147P Motor Board USB I&P Box SD4Y Programmer Support Tools AS5147P
- 17. Confidential © ams AG 2015 Page 17 DAEC™ Stray field immunity Excellent price-performance ratio Immunity to harsh environments SEooC according to ISO26262 Ease of Use Videos: AS5147P Value Proposition Summary
- 18. Confidential © ams AG 2015 Thank you! Please visit our website www.ams.com/Magnetic-Position-Sensors
Notas del editor
- Welcome ! ams launched a new version of its 47 series of magnetic rotary position sensors for motor and motion control applications. The high speed rotary position sensor AS5147P is ideal for use in ultra-high speed automotive applications, offers magnetic stray field immunity and supports ISO26262 compliance programs. During this session we will make you familiar with the most important background information , features and benefits of this new member of the ams 47 series family.
- Here is a quick overview of ams Hall-based magnetic position sensors which can address both remote and embedded applications. As shown in this slide the AS5147P is Angular on-axis rotary position sensor which can be used in applications like electric power steering (EPS), brake and accelerator pedals, pumps, double-clutch transmissions, starter motors, alternators and windscreen wiper motors.
- A comparison of the AS5147 versus the AS5147P shows improvements in the following areas: Maximum speed: up to 28k rpm Encoder resolution (bit/deg): 12/0.09 Encoder pulses: max. 1024 (bin) Noise: 0.06°rms Dynamic angle error correction (linear prediction) Dynamic angle error @28krpm: 0.35° Standard SPI interface Functional Safety: SEooC according ISO 26262
- Like other members of the 47 series, the new AS5147P features ams’ DAEC™ (dynamic angle error compensation) technology, which produces outstanding angle measurement accuracy even at very high rotation speeds. The total system cost of a design based on the 47 series is also normally far lower than the cost of an equivalent optical encoder or resolver. In the new AS5147P sensor, the maximum rated measurement speed has been increased up to 28,000rpm, thus enabling it to support many high speed rotating shaft applications that previously could only be addressed with optical encoders. The AS5147P enables manufacturers to achieve ISO26262 compliance by offering very high reliability, comprehensive analysis of the effects of directly and indirectly dangerous faults, and very low Failure In Time (FIT) rates and can be used in applications requiring any ASIL grade.
- The AS5147P was developed in adherence to the ISO26262 flow, following the SEooC (Safety Element out of Context) and AoU (Assumption of Use) guidelines specified in the standard, thus helping manufacturers to achieve the requirements of any ASIL grade ams provides a safety manual and failure mode effects diagnostic analysis (FMEDA) document for the AS5147P, guiding customers on the way to achieve their target ASIL grade in various applications. Evidence – safety case, certifications and the AECQ-100 qualification (PPAP) – is ready to provide the documentation of the AS5147P’s development process. The complete SEooC process according to the ISO26262 and the documentation supporting it are certified by an independent third party. The AS5147P provides internal diagnostic functions supporting ISO26262 processes, including magnetic field strength threshold detection, and detection of loss of magnet.
- The problem with the existing magnetic position sensors on the market is a delay which a result of signal processing. This causes wrong angle position outputs, especially at high rotation speeds. The value of the so called dynamic angle error depends on rotation speed. Additional hardware chips can calculate this error and do a software correction on the output angle. Therefore significant software development is needed. But still this result is not as good as using ams’ patented DAEC™. The DAEC™ Dynamic Angle Error Compensation is the unique feature of the new generation of ams’ position sensors. It is a single chip solution which reduces the Dynamic Angle Error almost to zero. It delivers all the advantages of contactless angle measurement and there is a much better accuracy over speed. Further, it is easy to use, simple to program and reduce development costs as well as time to market.
- High Output refresh rate allows for faster control loops and eliminates need for compensation. ams´ patented technology DAECTM reduces the angle error to almost zero.
- Stray field immunity against homogeneous external magnetic stray fields can be guaranteed by the ams patented principle. Thanks to the crossed differential measurements all ams magnetic position sensor can stand external magnetic stray field much above the limits required by the most demanding OEMs
- Application example – electric power steering The EPS motor with AS5147P inside controls commutation of brushless DC motor.
- Application example – efficient motor commutation Brushless DC (BLDC) motor are the preferred choice in EPS as it offers better starting torque and efficiency. The AS5147P provides fast and accurate measurements and eliminates need for discrete hall sensors in stator.
- The new AS5147P from ams ensures superior durability through contactless “system-on-chip” solution, reduces system costs and offers high accuracy of < ±1.0°.
- The AS5147P draws on patented DAEC™ (Dynamic Angle Error Compensation) technology to deliver accurate position measurements even at extremely high rotation speeds. The DAEC compensation scheme reduces the propagation delay inherent in the sensor’s signal chain to almost zero. In addition, the AS5147P supports automotive OEMs’ ISO26262 compliance programs through increased functional safety via on-sensor diagnostics.
- Unlike competitive ICs for high speed rotational shaft applications the AS5147P from ams provides ultra-low latency, fast output refresh rates, stray field immunity, and high accuracy performance, while enabling reduced system costs. Compared with discrete sensors for high speed rotational shaft applications and motor commutation the AS5147P provides ultra-low latency, very fast output refresh rates, stray field immunity, and high accuracy performance, while reducing system costs. The rigorous ISO26262 standard for automotive functional safety requires vehicle manufacturers to achieve high levels of reliability, to analyze the effects of the failure modes of components and systems, and to take measures to guarantee functional safety in the event of a predictable failure. The AS5147P enables improved ISO26262 system safety compliance.
- Competitive Positioning against Competitive IC Solutions For high speed rotational shaft applications requiring precise rotary position measurements, ams’ AS5147P rotary position sensor IC provides ultra-low latency, superfast output refresh rates and high accuracy performance, while enabling reduced system costs.
- Competitive Positioning against Discrete Solutions For high speed rotational shaft applications requiring precise rotary position measurements and motor commutation feedback, the AS5147P provides ultra-low latency, stray field immunity, and high accuracy performance, while reducing system costs and enabling improved ISO 26262 system safety compliance.
- The following tools are available supporting the evaluation and design-in of the AS5147P: - Adapter Board - Motor Board - USB I&P Box - SD4Y Programmer
- The added values for our customers can be summarized as follows: DAECTM – Dynamic Angle Error Compensation Stray field immunity Excellent price-performance ratio Immunity to harsh environments SEooC according to ISO 26262 Ease of use
- According to Heinz Oyrer, senior marketing manager at ams, ‘Offering a combination of high accuracy, compact size and low system cost, magnetic position sensors are widely regarded as the best solution for rotary position sensing in vehicles. Now with the AS5147P, ams has made a magnetic position sensor which fits seamlessly into OEMs’ ISO26262 compliance programs, and which also eliminates any concerns over the effect of stray magnetic fields’.