Weitere ähnliche Inhalte Ähnlich wie Infineon Angle Sensors for Automotive Applications (20) Kürzlich hochgeladen (20) Infineon Angle Sensors for Automotive Applications2. Angle Sensors at a glance
An Angle Sensor…
detects the angle of a magnet
is factory calibrated
is ideal for Steering angle and
Brushless DC motors
is available with analog or
digital outputs
2013-06-26
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 2
3. Angle Sensor based on integrated Magneto
Resistive (ixMR) Technologies
Infineon Angle Sensors
ixMR Technologies
GMR
The sensor detects the
orientation of an applied
magnetic field by measuring
sine and cosine angle
components with monolithically
integrated magneto resistive
elements
Magneto resistive technology is
now widely used in automotive
applications such as Steering
angle, Electric Power Steering
(EPS) and Throttle
AMR
Hexternal
M
I
Permalloy
80% Ni / 20% Fe
Inplane
sensitivity
High sensitivity
Low Jitter
3600 angle
range
For fields up to
80mT
Monolithically
integrated in
CMOS, BiCMOS
Copyright © Infineon Technologies AG 2013. All rights reserved.
Inplane
sensitivity
High sensitivity
Low Jitter
1800 angle
range
Medium field
range
Monolithically
integrated in
CMOS, BiCMOS
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4. Infineon´s ixMR technology is fast and
robust against Mechanical Tolerances
Improved
tolerance to
misalignment
High speed
2013-06-26
The ixMR element senses a field’s direction, not
intensity. Variations in field intensity within the sensor’s
range therefore have minimal impact on angle accuracy
The area sensitive to ixMR is very small. Therefore it is
easier to keep it within the homogenous zone of the
magnetic field in case of small mechanical failure.
Infineon
Angle Sensor
Low
Sensitivity to
air gap
variation
ixMR technology is extremely fast. Its speed is not
limited by the reaction time of the MR element but by
delay in the amplifier circuit
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 4
5. More than a Sensing Element:
Integrated and calibrated Angle Sensors
Monolithically integrated
Magneto Resistivity sensing
element for better reliability
and cost
High update rate up to 43µs
(23kHz) for Motor
commutation applications
Incremental interface output
for easy replacement of
optical encoders
2013-06-26
Factory calibrated for best
accuracy over temperature
Infineon
Angle Sensors
Unambiguous output over
3600 allowing better motor
control and noise
performance
Up to two parallel interface
for optimal safety concept
integration
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 5
6. Angle Sensor for Automotive Applications
Brushless DC Rotor Position Sensing (e.g. EPS, Actuators)
An angle sensor on the shaft of a
Brushless DC motor allows to replace
the resolver for lower cost solution
Sensor Requirement
Fig: Angle sensor acting as rotor position sensor example
360O range
Low delay
Infineon Solution
Dual die for redundancy
Two interfaces operating in parallel
TLE5009
High accuracy through internal autocalibration
TLE5012B
2013-06-26
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 6
7. Angle Sensor for Automotive Applications
Steering Angle
Nonius Principle measure more
accurately than could be done by
reading a uniformly-divided straight or
circular measurement scale. For
Infineon, this principle allows to
measure the steering angle over
several turns and provides some
redundancy for safety purposes
180
160
140
120
100
80
60
40
20
0
0
200
400
600
800
1000
1200
1400
Fig: Nonius scale
Sensor Requirement
Fig: Steering angle calculation example using Nonius Principle
360O range
Low delay
Infineon Solution
Low cost
Functional safety features
TLE5009
Calculated angle
TLE5011
PWM/SPC interface
TLE5012B
2013-06-26
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 7
8. Product Portfolio: From single analog to
complex digital sensors
Bloc Diagram
Interface Type
Output Format
IFX Solution
0110100
Digital angle
0110100
Digital sin/cos
TLE5011
Analog sin/cos
TLE5009
1101010
2013-06-26
TLE5012B
Copyright © Infineon Technologies AG 2013. All rights reserved.
TLE5109
NEW
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9. TLE5012B: 3600 Digital Angle Sensors
Key features
Designed for 3.3V & 5V systems
15bit absolute angle resolution
42µs update-rate of calc. angle
SPI with 8Mbit/s
Interfaces: HSM, IIF, SPI, PWM, SPC
Description
Unambiguous detection on measurement
over 360º angle range
≤1° angle error over all
Automotive qualified (-40°C /150°C)
Application
Smallest angle error over lifetime and
temperature
Integrated angle calculation
Rotor position sensing for electric motor
commutation
High update rate and resolution best
for dynamic applications
Steering angle sensing
Two parallel interfaces available
General angular sensing
Extended range of safety features
2013-06-26
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 9
10. TLE5011: 3600 Digital Angle Sensors
Key features
Designed for 3.3V & 5V systems
360° angle range
16 bit sin/cos values
Interfaces: SSC (SPI) upto 2Mbit/s
Internal diagnostics
Automotive qualified (-40°C /150°C)
Description
Unambiguous detection on measurement
over 360º angle range
Digital, 16 bit sine/cos output
Application
Rotor position sensing for electric motor
commutation
Steering angle sensing
Integrated data processing
High update rate and resolution best
for dynamic applications
Extended range of safety features
Valve or flap position sensing
2013-06-26
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 10
11. TLE5009: 3600 Analog Angle Sensors
Key features
Analog output of sine and cosine
Constant amplitude over temperature
Built in offset temperature compensation
~9µs delay time
Description
≤3° angle error
Unambiguous detection on measurement
over 360º angle range
Up to 30,000rpm
Automotive qualified -40°C /150°C
Application
Steering angle
Brushless DC motor commutation
Rotary switch
General angular sensing
2013-06-26
Preamplified signals no additional
amplifier necessary
Temperature compensated amplitudes
use of full ADC-range over temperature
Single ended and differential analog
output independent of used µC
Diagnostic functions improve of safety
level
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 11
12. TLE5109: 1800 Analog Angle Sensors
NEW
Key features
Analog output of sine and cosine
Constant amplitude over temperature
Built in offset temperature compensation
~9µs delay time
Description
≤1.2° angle error
Unambiguous detection on measurement
over 180º angle range
Up to 30,000rpm
Automotive qualified 125°C
Application
Steering angle
Brushless DC motor commutation
Rotary switch
General angular sensing
2013-06-26
Preamplified signals no additional
amplifier necessary
Temperature compensated amplitudes
use of full ADC-range over temperature
Single ended and differential analog
output independent of used µC
Diagnostic functions improve of safety
level
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 12
13. Infineon Sensors – Making lives easier,
safer and more comfortable
Infineon Angle Sensors
Infineon has already established a very strong position in the
automotive sector with the broadest magnetic sensor portfolio in the
market
We have shipped over 2 billion magnetic sensors to customers in the
automotive, consumer and industrial application sector
Angle sensor detects angle based on Monolithically integrated Magneto
Resistive (iXMR) technologies for better reliability and cost
Factory calibrated angle sensors for down to 1.00 accuracy
Angle sensors for automotive applications such as Steering angle,
Brushless DC rotor position steering
We offer various products featuring analog or digital outputs
2013-05-02
Copyright © Infineon Technologies AG 2013. All rights reserved.
Page 13