Precision Cogging Torque and Torque Ripple Measurement for Motor Development
The Sugawara ATM-100, ATV-100, and ATV-100S are precision motor test systems designed to measure cogging torque and torque ripple with high angular resolution and minimal mechanical influence.
Cogging torque can contribute to uneven rotation, vibration, noise, and control disturbances in permanent-magnet motors. Sugawara's vertical measurement architecture eliminates axle bearings from the torque sensor arrangement, reducing mechanical loss that could otherwise affect low-torque measurements.
0.01°
Angular measurement resolution across the ATM / ATV Series
1 mN·m to 10 N·m
Torque range covered by interchangeable sensor options
Up to 36,000 Points
Measurement data acquired per revolution at low rotational speeds
Up to 50 r/min
High-speed cogging torque measurement with the ATV-100S
The ATM-100 is optimized for lower-torque motors from 1 mN·m to 100 mN·m. The ATV-100 supports 100 mN·m to 10 N·m measurement at speeds up to 20 r/min, while the ATV-100S extends the same higher-torque platform to 50 r/min for faster motor evaluation.
Cogging Torque Measurement
Measures periodic torque variations caused by magnetic interaction between the rotor and stator in permanent-magnet motors.
Torque Ripple Measurement
The same system can evaluate both cogging torque and torque ripple for comprehensive motor torque analysis.
Minimal Mechanical Loss
Vertical torque sensors use no axle bearings, reducing mechanical loss that could otherwise introduce measurement error.
0.01° Angular Resolution
High angular resolution supports detailed characterization of periodic torque variations throughout motor rotation.
Up to 36,000 Data Points
At low rotational speeds, the system acquires up to 36,000 measurement points per revolution for detailed waveform analysis.
Interchangeable Torque Sensors
Five torque sensor ratings cover measurement ranges from 1 mN·m to 10 N·m.
High-Speed ATV-100S
The ATV-100S extends the ATV platform to rotational speeds up to 50 r/min for faster cogging torque measurement.
TORQuick CT Analysis
Dedicated software supports XY, polar-coordinate, and FFT display, torque-ripple analysis, and measurement data evaluation.
Brushless DC Motor Development
Evaluation of cogging torque and torque ripple in permanent-magnet
brushless motors.
Servo Motor Evaluation
Measurement of torque variation that can influence positioning
accuracy, smoothness, noise, and vibration.
Stepping Motor Development
Detailed characterization of periodic torque behavior during
low-speed rotation.
Motor Quality Control
Comparative measurement of production motors to evaluate consistency
of cogging torque and torque characteristics.
Motor Design Validation
Evaluation of rotor, stator, magnet, and design changes through
precision torque measurement.
Fan & Pump Motors
Customized fixtures can support motors such as fan and pump motors,
including configurations without a protruding shaft.
ATM-100 / ATV-100 / ATV-100S Comparison
| Specification | ATM-100 | ATV-100 | ATV-100S |
|---|---|---|---|
| Torque Sensors | TSA-1MN / TSA-10MN / TSA-100MN | TSA-100MN / TSA-1N / TSA-10N | TSA-100MN / TSA-1N / TSA-10N |
| Rated Torque | 1 mN·m / 10 mN·m / 100 mN·m | 100 mN·m / 1 N·m / 10 N·m | 100 mN·m / 1 N·m / 10 N·m |
| Torque Accuracy | ±0.5% of rated torque | ±0.5% of rated torque | ±0.5% of rated torque |
| Rotation Speed | 0.1–20 r/min | 0.1–20 r/min | 0.1–50 r/min |
| Speed Setting | 0.1 r/min increments | 0.1 r/min increments | 0.1 r/min increments |
| Angular Resolution | 0.01° | 0.01° | 0.01° |
| PC Connection | USB; RS422 optional at order | USB; RS422 optional at order | USB; RS422 optional at order |
| Power | 90–240 VAC, 50/60 Hz | 90–240 VAC, 50/60 Hz | 90–240 VAC, 50/60 Hz |
| Dimensions | 300 × 350 × 540 mm | 600 × 350 × 391 mm | 600 × 350 × 391 mm |
| Weight | 70 kg | 75 kg | 75 kg |
Data Acquisition by Rotation Speed
| Rotation Speed | Data Points / Revolution | Sampling Interval | Applicable Models |
|---|---|---|---|
| 0.1–1.5 r/min | 36,000 | 0.01° | ATM-100 / ATV-100 / ATV-100S |
| 1.6–3.0 r/min | 18,000 | 0.02° | ATM-100 / ATV-100 / ATV-100S |
| 3.1–8.0 r/min | 7,200 | 0.05° | ATM-100 / ATV-100 / ATV-100S |
| 8.1–15.0 r/min | 3,600 | 0.10° | ATM-100 / ATV-100 / ATV-100S |
| 15.1–20.0 r/min | 1,800 | 0.20° | ATM-100 / ATV-100 / ATV-100S |
| 20.1–30.0 r/min | 1,200 | 0.30° | ATV-100S |
| 30.1–40.0 r/min | 900 | 0.40° | ATV-100S |
| 40.1–50.0 r/min | 720 | 0.50° | ATV-100S |
