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MR-Sensors
Where do you use MR-sensors?
MR-sensors, evaluation electronics and magnetic scales from Sensitec are in use everywhere, where movement is being controlled and steered, where paths, angles, positions, electric or magnetic fields are measured and detected.
What is the MR effect?
The MagnetoResistive Effect, "MR-Effect", has been known for 150 years. However, its use in sensor applications was first made practically possible through the development of thin-film technology some 30 years ago.
You will find us
… at the following exhibitions and fairs.
Our exhibition team is looking forward to presenting you our new products and innovations and to giving you technical advice for your individual measuring application.
Power Electronics
High accuracy and highly dynamic response are key requirements for current sensors in power electronics applications. MR-based current sensors fulfil all these demands, while at the same time providing excellent efficiency due to their very low power consumption compared to other types of sensor.
Typical Applications
- Current sensor for inverter module
- Current sensor for servo controller
APPLICATION EXAMPLE: Current measurement for dynamic control of servo motors
Requirements
A fast and highly accurate current measurement is required for the highly dynamic control of servo motors.
Key Specifications
- Current range:
- 100 A
- Linearity error:
- < 0.2 %
- Temperature range:
- -20 °C up to +85 °C
Solution from Sensitec
The CDS4000 current sensor is mounted on the controller board. The internal signal conditioning of the sensor system means that no external circuits are necessary. The sensor is provided with a current output.
Why use MR sensor technology?
- Unipolar power supply (+5 V)
- Frequency range from DC up to 200 kHz
- Short-term overcurrent of 3 times nominal current
- Reference voltage input
- Adjustable overcurrent limit
