4Q ABS Motors Test System is a turnkey stand-alone test bench to measure all require performance tests for ABS motors. The system can be found in tests lab and in production floor as EOL performance test bench.


Passive (de-energized winding) Tests:

  • Winding resistance & inductance line-to-line
  • Back EMF Constant
  • Cogging & Friction Torque
  • High Speed Friction Torque
  • Low Speed Friction Torque / Magnetic Drag


Active (energized winding) tests:

  • Ripple Torque with order analysis.
  • Torque Constant
  • Full tests: Torque, Speed, current, voltage, Power In, Power out and efficiency.

Ramp Performance Tests:

Ramp up and ramp down performance. The Motor Under Test (MUT) is installed in the test fixture and voltage is applied to the MUT terminals. The test cycle will ramp down the MUT from No load to the pre-defined speed within the ramp down time setting, keep The MUT on steady speed and torque for some defined time and ramp up the MUT to the no load speed within the ramp up time settings.

The motor performance curve is calculated from the average value between acceleration and deceleration performance curves.

4Q ABS Motor Test stand
figure2: abs motors
Time Vs Torque

4Q-ABS is designed to supply high-speed and high dynamic performance using ‘High Speed’ asynchronous vector motors as load machines.


The system is also designed to have low vibration level and give easy tools for the alignment of the MUT in the test bench. All measurement items such as torque and speed can be easily calibrated using the system software interface along with the electrical measurement of Voltage and Current that can be calibrated also.

Ambient temperature0 to 50℃
Surrounding Humidity90%RH or below
Power input1Ø, 230VAC 50/60Hz
Power input3Ø, 380VAC 50/60Hz
Measurements and results
       Speed range0 to 10000 rpm
       Angle0.09° (4000PPR)
       RotationCW and CCW
       Torque / Speed / Cogging / Friction / Rotation / Current / Voltage / Power In / Power Out / Efficiency values
        All Tests vs. speed or torque display
        Harmonic analysis – 1-150 order


Model Number4Q-EPS 054Q-EPS 104Q-EPS 20
Rated Torque5 [Nm]10 [Nm]20 [Nm]
Accuracy Scale0.1 % F.S
Ordering No:  4Q-ABS-___  
4Q-ABS-05: 05[Nm] 
 4Q-ABS-10: 10[Nm]
4Q-ABS-20: 20[Nm] 
Example4Q-ABS-20 mean 4Q ABS test system with 20Nm range.
For more details contact us