Motor Test Bench / Dynamometer
Test instrumentAutomatedSemi-automatic
No-load, load, T–N curve, efficiency, back-EMF and Hall-phase testing.
✓ Expert reviewed All content on this page has been reviewed by a senior motor engineer.
Selection criteria
Torque range and accuracy, speed range, data acquisition.
Supply chain
Shenzhen and Huizhou makers build hysteresis and powder dynamometers and motor test systems for small motors, alongside the Shenzhen office of a Taiwanese test brand. Match torque range to the motor and check that the software automates T–N curves and efficiency maps.
Buyer FAQ
- Hysteresis, magnetic-powder or eddy-current dynamometer?
- Hysteresis brakes are precise and smooth down to zero speed — ideal for small motors up to a few hundred watts. Magnetic-powder brakes give high torque at low speed. Eddy-current brakes suit higher power and speed but cannot load at standstill; for regenerative or four-quadrant tests use a motor-generator (AC) dynamometer.
- What should the end-of-line test include?
- At least no-load speed and current, a load point or short T–N curve, back-EMF, Hall signal sequence, hipot and noise / vibration. Full efficiency maps are for type testing and sampling, not every unit.
- How accurate does the torque measurement need to be?
- Choose a torque sensor whose range is 1.5–2 × the motor's peak torque, with accuracy around 0.1–0.2 % of full scale for efficiency work. Calibrate traceably and check zero drift before each shift.
Where it is used
Motor assembly process
- 57 mm Inner-rotor BLDC Motor11. End-of-line test
- 42 mm Two-phase Hybrid Stepper Motor (NEMA 17)11. End-of-line test
- 57 mm Two-phase Hybrid Stepper Motor (NEMA 23)11. End-of-line test
- 37 mm Brushed DC Gear Motor (spur gearbox)10. Run-in & motor test, 12. Gear motor end-of-line test
- 86 mm Two-phase Hybrid Stepper Motor (NEMA 34)12. End-of-line test
- 57 mm Integrated BLDC Motor (built-in driver)12. End-of-line test
- 70 mm Outer-rotor BLDC Motor12. End-of-line test
- AC Servo Motor (60–130 mm flange)12. Encoder mounting & commutation alignment, 13. End-of-line test
- Coreless Brushed DC Motor (16–22 mm)11. Run-in & end-of-line test
- IEC Three-phase Induction Motor (frames 80–160, IE3)12. Routine & efficiency test
- Linear Motor & Voice-coil Motor12. Performance test on linear stage
- Direct-drive Torque Motor & Robot Joint Module8. Encoder mounting & calibration, 10. Joint calibration: backlash, stiffness & accuracy, 11. End-of-line test