Testsystems

Magnetic Test Benches

Magnetic field testing with absolute precision

From design validation to series testing: identify magnetic irregularities before they cost you, and raise the quality bar for every motor that leaves your line.

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Trusted by leading companies

BMW Siemens ABB tesa STIHL

Detailed reports

Measure and analyse in seconds

Customise evaluation

Select criteria and tolerances on your own

Automated

End-of-line testing

Inline

Production integration

Faster testing.
Fewer defects.
Lower costs.

Magnetic imbalances and NVH issues get more expensive the later you find them. Koob test benches measure the magnetic field of permanent-magnet and externally excited rotors in as little as 8 seconds, fully automated, with 100% end-of-line inspection. From prototype to series production.

Min. cycle time
8 s
Automatic evaluation
Pass/Fail
Individual evaluation
Per pole
Measuring range
±0.5/1/2 T
Rotor temperature
20–55 °C
Calibratable
DAkkS
Explore test benches Read more about the advantages
Koob mobile test bench with a rotor clamped in the fixture and a workstation showing a 3D field plot.
Our mobile test bench with a single sensor

Configurations

Built for your application

Every Koob test bench is modular. Choose your motor type, deployment, and sensor setup, then add optional modules.

Motor type

  • PSM
  • EESM
  • AFM
  • Linear magnets

Deployment

  • Mobile
  • Inline

Sensors

  • Single sensor
  • Sensor array

Add-on

  • Optical 3D scanner
Build your test bench

Advantages

Why measure the magnetic field

Electric motors work through the interplay of electric currents and magnetic fields. The quality and orientation of those fields set the torque, the efficiency and the smooth running of the machine. Testing them is therefore decisive in securing the motor’s performance, reliability and service life.

Our test systems enable high-resolution analysis of the magnetic fields in permanent-magnet and externally excited rotors — contactless, automated and in real time. The results are valuable across the entire product life cycle: from validating early prototypes, through in-line inspection in series production, to targeted maintenance in operation.

Choose a test bench Read the full article
Torque
Flux density in the rotor sets what the motor can deliver
Efficiency
Better material use, lower weight and size for e-mobility
Smooth run
Magnetic imbalance is where NVH complaints start

What a measurement gives you

  1. Detect Design and Manufacturing Defects

    Deviations in the magnetic field reveal incorrectly installed magnets, demagnetized components, or misaligned rotors before the part leaves the production line.

  2. Reduce Power Loss Through Optimal Pairing

    Calibrated parts are specifically paired: a strong rotor is matched with a weaker counterpart. The result is more consistent performance and higher yield.

  3. Validate Simulations Using the Actual Part

    Measurements show whether the simulated magnetic field matches reality. This forms the basis for reliable drives at OEMs and Tier 1 suppliers.

  4. Verifying EMC in Sensitive Areas

    Magnetic stray fields can interfere with sensors and control units in medical technology and the automotive industry. Measurements detect them early on.

  5. Early Detection of Damage During Operation

    Demagnetization and mechanical damage leave traces in the magnetic field. This enables targeted maintenance rather than blanket maintenance, resulting in less downtime.

Our clients & Partners

In Good Company

Trusted by leading companies and research institutions. Become part of our network.

  • Karlsruher Institut für Technologie
  • Valeo
  • Vitesco Technologies
  • ZF
  • STIHL
  • Schaeffler
  • Siemens
  • ABB
  • BMW
  • Audi Sport
  • Daimler Truck
  • SEG Automotive
  • Keyence
  • tesa
  • HIWIN
  • HAHN Automation Group
  • Sturm Gruppe
  • BBS

FAQ

Questions & answers

Can you measure our motor without us buying a test bench?

Yes. With our contract measurement service we measure and analyse your rotors for you — in our test lab or, at plants in Germany, directly on-site with our mobile test benches, using a sensor array or a single sensor as your task requires.

You receive a 3D model of the magnetic field together with the measurement data, for example to compare against your simulation.

More on contract measurement
How do you detect faults you cannot see on the rotor?

Electric motors are quiet, which makes unwanted noise and vibration (NVH) stand out all the more. One main cause is magnetic imbalance in the rotor. Our test systems measure polarity, pole strength and pole symmetry, and so detect deviations that would otherwise only become noticeable in the finished drive.

Read article
How do our test systems contribute to structured fault detection and prevention (FMEA)?

In electric motors, even the smallest faults on the rotor or bearings can lead to a loss of performance or to total failure. An FMEA helps to identify and prevent such faults systematically, before they occur. Koob’s magnetic field test systems and 3D scanners reliably detect typical fault patterns such as irregular magnetic fields or dimensional deviations, so that faulty components are never installed in the first place.

Read article
Industrial laser profile sensor projecting a blue measurement line across a component.

Automated Inspection

Automatically measure components and detect missing features and defects.

Dual measurement

Geometry and magnetic field captured in a single cycle, with position-accurate correlation between the two data sets.

Live 3D scanner view showing a laser contour profile captured from a rotor.

Industrial 3D Scan

Instant geometric measurement

Our laser contour measurement enables precise geometric analysis of your components – from length control and part presence detection to runout inspection.

  • Part presence detection
  • Length/position control
  • Runout and flatness inspection
Read more about our Industrial 3D scan services

More from Koob

Our services

As a holistic technology partner, we offer you a broad spectrum of specialized services in measurement technology, test bench development, software, electronics, and manufacturing.

Ready to talk specifics?

Tell us what you need to measure.

Send us your rotor specification and the tolerances you have to hold. We will come back with a concrete proposal for the bench, the cycle time and the integration.

Start an inquiry