application examples for position sensors• automotive –chassis position sensing • capacitive...
TRANSCRIPT
Application Examples for Position Sensors
ams
Elisabeth Bürgler
19. June 2020
…contents animated slides
Application Examples SlidesContent
• Inductive position sensor
• Automotive – Traction Motor
• Automotive – Electric Break Booster
• Industry – Robot
• Magnetic Position Sensor
• Automotive – Oil Pump for Adaptive Damping Systems
• Automotive – EPS
• Automotive – Chassis Position Sensing
• Capacitive Presence Sensing
• Automotive – Hands on Detection→ coming soon
•
Traction Motor – high speed: AS5715R
Application Example – Inductive POS
Target
RX-Coils
TX-Coil
AS5715R
Automotive Traction Motor
Solutions
Contactless sensing system
• Best in class accuracy
• Low noise system
• Immune against stray fields
• Outperform ISO11452-8
• Flexible coil and PCB design
• Minimum space in axial direction
• ISO26262 certified
• Redundant coil systems allow ASIL-D
Challenges ams Solutions
Highest efficiency of the motor required
Magnetic stray fields
Compact form factor
Safety requirements - ASIL D
Very harsh environment
Active Brake System – Motor: AS5715R
Application Example – Inductive POS
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Target
RX-Coils
TX-Coil
AS5715R IC
Automotive Motors
Solutions
Contactless sensing system
• Best in class accuracy
• Low noise system
• Immune against stray fields
• Outperform ISO11452-8
• Flexible coil and PCB design
• Minimum space in axial direction
• ISO26262 certified
• Redundant coil systems allow ASIL-D
Challenges ams Solutions
Highest efficiency of the motor required
Magnetic stray fields
Compact form factor
Safety requirements - ASIL D
Very harsh environment
Industrial Robot
Application Example – Inductive POS
Target
RX-Coils
TX-Coil
AS5715R IC
Industry robots
Solutions
Best in class accuracy (error < 0.3°)
• Minimum space in axial direction required
• Individual coil shapes possible
• Immune against stray fields
• Outperform ISO11452-8
Contactless sensing system
• ISO26262 certified
• Redundant coil system allows ASIL-D grading
Challenges ams Solutions
Compact form factor
Magnetic stray fields
Harsh environment
Safety requirements
High accuracy and precision
AS5147U - Application ExampleActive Damping System – Highly Dynamic Hydraulic Pump
Position Sensor
Barrier
(aluminum)
Magnet
Highly Dynamic Hydraulic Pump
Solutions
• DAEC™ implemented
• Best in class accuracy
• Immune against stray fields
• Outperform ISO11452-8
• Contactless Sensing Principle
• Sensing trough aluminum cover possible
High speed capability – 30 krpm
• ISO26262 certified
• ASIL-C grading possible with single die sensor
Challenges ams Solutions
Magnetic stray fields
Magnet and sensor hermetically sealed
Rotation speeds > 5000 rpm
Safety requirements – ASIL-C
Highly dynamic motor/pump system
Electric Power Steering – Motor Control: AS5x47y
Application Example
Disturbing Stray Fields!
Electric Power Steering
Solutions
Best in class accuracy
• Immune against stray fields
• Outperform ISO11452-8
Small packages – TSSOP14, TQFP32…
• High speed capability – 30 krpm
• DAEC™ compensates propagation delay
• ISO26262 certified
• Dual die package enables ASIL-D grading
Challenges ams Solutions
Magnetic stray fields
Compact form factor
Rotation speeds > 5000 rpm
Safety requirements – ASIL-D
• Smooth running motor
• No torque ripple
• No acoustic noise
• High efficiency
Chassis Position Sensing – low speed: AS517xy
Application Example
Beam height control
Chassis Position Sensing
Solutions
Contactless sensing system
• Interface options – SENT, PSI5, PWM, Analog
• OTP programming
• Immune against stray fields
• Outperform ISO11452-8
SOIC8, TSSOP14, MLF16
SIP – System in Package
• ISO26262 certified
• Dual die package enables ASIL-D grading
Challenges ams Solutions
• Angle segment measurement
• Various output configurations
Magnetic stray fields
Compact form factor
Safety requirements - ASIL D
Very harsh environment