HDmag MHAD – high-resolution, bearingless absolute encoder with additional incremental signals

Durable and space-saving, for shafts up to 42 mm in diameter.

Maintenance-free operation, reduced mounting depth, and a virtually unlimited lifetime are the main benefits of bearingless encoders. With a 50 mm rotor diameter, the new HDmag MHAD is suitable for up to 42 mm shafts,

so the HDmag MHAD is perfect for applications under extremely cramped mounting conditions.

Mouse over the numerals and learn more about our new bearingless encoder:

Redundante AbtastungZwei Schnittstellen in einem GerätSicherer und einfacher AnschlussHohlwelleRobustes Sensor-Aluminiumgehäuse in Schutzart IP 67Axiale Toleranz20 mm BautiefeRedundante AbtastungFunktionsüberwachungRadiale Toleranz 1 mm20 mm BautiefeLagerlose Konstruktion mit magnetischem Messprinzip

Two interfaces in one device

The singleturn encoder provides incremental signals in addition to the absolute position via SSI or CANopen. These signals are used for rotational speed control or can be processed in a second servo loop.

Safe and easy connection

The short-circuit-proof and polarized connection protects the electronic assembly from secondary damage caused by installation errors.

Hollow shaft

The compact rotor is suitable for direct installation on shafts ranging from 20 to 42 mm in diameter.

Robust sensor aluminum housing in protection class IP 67

The robust housing design provides reliable protection from mechanical damage and penetration of dust and moisture.

Axial tolerance: +/- 1 mm

The encoder is also suitable for use on the loose bearing side and in case of axial shaft play.

Redundant sensing

Mounting a second sensor on the same rotor is also an easy and cost-effective way to implement safe applications. In extreme cases, the special housing shape allows the use of up to four sensors. This allows compact and flexible implementation of systems with a redundant design and a high level of availability, precisely tailored to the application.

Function monitoring

The integrated sine-cosine monitoring system for sensor signals guarantees correct position values at all times. An integrated LED indicates the current status. At the same time it serves as an adjusting aid and simplifies installation. Any occurring warnings are reported to the control system via the interface.

Radial tolerance: 1 mm

The radial tolerance of 1 mm also allows use during large shaft movements as well as operation at shaft temperatures higher than the operating temperature of the sensing head. The distance prevents heat transmission from the shaft to the sensor.

Overall depth: 20 mm

Installation does not require any additional installation space and is also possible on the A-side or between the motor and ventilator. The rotor is attached flexibly and the shaft end also remains free for other purposes.

Bearingless design with magnetic measuring principle

No wear parts and virtually unlimited lifetime. The magnetic sensing system is resistant to frost, condensation, liquids and dust and is very shock- and vibration-resistant. The wide temperature range from -40 to +85° C and resistance to condensation also allow outdoor use.

  • Product
    • MHAD 50 HDmag

      • Resolution 16 bit and additionally up to 8,192 pulses per revolution
      • Through hollow shaft 20...42 mm
      • Overall depth 20 mm
    Further information

    Integrated function monitoring and redundancy
    The bearingless encoder also features high operational safety and maximum availability.

    Application example: commercial vehicles
    The bearingless encoder is impervious to environmental influences and is therefore ideally suited for commercial vehicles.

    Highlights
      • Absolute encoders (singleturn) with additional incremental signals
      • Resolution: 16 bit
      • Magnetic sensing Bearingless, no mechanical wear parts
      • Virtually unlimited lifetime
      • Low overall depth (20 mm) Easy to implement, redundant sensing with up to 4 sensing heads
      • High resistance to shocks and vibrations
      • Large radial and axial tolerance (1 mm and/or ±1 mm)