Analog Devices Inc. Magnetfeldsensoren

Magnetfeldsensoren von Analog Devices integrieren große Mengen von Hallzellentechnologie und Messschaltkreisen zur Minimierung von temperaturbedingten Abweichungen, die Teil der Silizium-Hallzellen-Charakteristika sind. Die Konstruktion der Magnetfeldsensoren maximiert die Vorteile einer monolithischen Implementierung und bietet gleichzeitig ausreichend Flexibilität, um die Anforderungen einer Vielzahl von Anwendungen mit minimalem Komponentenaufwand zu erfüllen.

Position sensors are available in single-turn and multiturn configurations. Single-turn position sensors measure a single rotation, while multiturn sensors measure multiple rotations, even in the absence of power. The ADI MagIC+ current sensors utilize AMR platforms to enable innovative sensing technologies and deliver radical improvements over incumbent core-based Hall technology or CT-based solutions.

Merkmale

Single-turn position/current sensors
- Reduced motor torque ripple
- Improved motor efficiency and smoothness
- Improved responsiveness
- Lower system power and reduced heat
- Linear/rotary arrangements are possible
Multiturn position/current sensors
- Measures multiple rotations in the absence of power
- “True power-on” single chip multiturn position sensor
- 46 turn (0 to 16,560°) measurement range, clockwise and counterclockwise
- Enables
  - Simplified actuator systems that reduce size, weight, and costs
  - Elimination of backup or continuous power to the actuator
- Eliminates the need for
  - Backup battery + memory + single-turn sensor
  - Continuous power + memory + single-turn sensor
  - Mechanical reduction gearbox + single-turn sensor
  - Linear position sensors or transducers

MagIC+ current sensors
- Flexible form factor
- Reduce solution thickness up to 7x compared to solutions with flux concentrators
- Up to 10x less power consumption compared to closed-loop sensors
- High-resolution measurements (>100dB)
- MHz operation possible
- DC capable
- Zero offset
- High-precision open-loop DC and AC measurement
- Highly integrated coreless solution with signal conditioning, temperature compensation, and coil drivers
- Wide magnetic flux density range up to ±8mT
- Zero offset over temperature and life when chopped and flipped
- High bandwidth for fast response times

Applikationen

Single-turn position/current sensors
- Industrial
  - Servo drives
  - Process control equipment
  - Factory automation equipment
- Automotive
  - Starter generator motor (SGM)
  - Electrical power steering (EPS)
  - Electrical braking

Multiturn position/current sensors
- EPS steer-by-wire actuators
- Multiturn for occupant safety
- Automotive and industrial rotary to linear actuators
- Industrial factory automation
Current sensors
- Absolute magnetic field measurement with a high field range
- Current clamp meters
- General current measurement