Electric motor end-of-line test bench

When it makes sense

Every motor gets the same check

A hand-held sound check catches obvious problems. It stops being enough when:

Every motor on the line needs a noise and vibration check before it ships.
Results depend on which operator runs the test.
A bearing or assembly fault needs to be caught before the motor reaches the customer.

Hardware

What the bench uses

A drive spins the motor through a speed profile. Accelerometers and a microphone record vibration and noise, and the program turns them into spectra, orders and a pass or fail result.

The test

How the test works

Run the motor through its speed profile with the motor drive.
Record the vibration, the sound and the speed together.
Calculate the spectra, the orders and the band levels, and compare each value with its limit.
Store the pass or fail result with the serial number of the motor.

Software

The open-source software behind it

Your plantReceives the results

MES and quality databaseResults over OPC UA, MQTT or SQL

OpenEOLRuns the workflow

Task engine Open sourceRuns the speed profile and the measurement together

GUI framework Open sourceOperator screens with live data and the result

Reports and database Open sourceOne record for each motor

AnalysisOpen-source tools in the workflow

FFT and power spectral density Open sourceOpenEOL functions used for spectra and band levels

Sound level Open sourceOpenEOL function with A weighting and octave or third-octave bands

Order trackingAngle-domain resampling for order levels from the speed reference

Bearing fault sorting Open sourcepyBearing computes fault frequencies and runs envelope analysis

DriversTalk to the hardware

OpenEOL IO drivers Open sourceNI DAQmx or Dewesoft for acquisition, Modbus or CANopen for the motor drive, or other OpenEOL drivers

Vendor runtimeNI-DAQmx from NI, when NI hardware is used

Open-source tools such as pyBearing run inside the OpenEOL workflow, so your engineers can read and change every step. Order tracking and the pass or fail limits are built for each motor type.

Related use cases

Other motor and rotating tests

Bearing noise test station

Vibration or force signatures sorted by bearing fault type and severity.

Details

Custom motor test bench for torque and efficiency

Torque, speed and efficiency measured on a dynamometer, for motors of any size.

End-of-line acoustic test

A declared sound power number and a pass or fail booth for the acoustic half.

Details