Precision Motor Torque and Performance Testing with Hysteresis-Brake Dynamometers
The Sugawara DM5001 / HB Series Motor Dynamometer System combines the DM5001 controller, HB Series hysteresis-brake dynamometers, and TORQuick software for precision motor torque, speed, output, and efficiency measurement.
The system uses a hysteresis-brake load mechanism to apply stable and repeatable load to the motor under test across a wide operating range. Thirteen HB Series dynamometers are available, allowing the measurement system to be selected according to required torque, motor output, and rotational speed.
±0.1%
System torque accuracy after calibration with the DM5001 controller
±0.01%
Rotation speed measurement accuracy
5 mN·m to 50 N·m
Torque range covered by the 13-model HB Series lineup
Up to 60,000 r/min
Maximum speed on selected HB Series dynamometers
The DM5001 can control multiple dynamometers and supports programmable torque, speed, and brake operation. When combined with compatible power meters, the system can also evaluate electrical input, mechanical output, power factor, and motor efficiency for development, validation, and production testing.
±0.1% Torque Accuracy
Provides system torque accuracy of ±0.1% of full scale after calibration with the DM5001 controller.
±0.01% Speed Accuracy
High-accuracy rotational speed measurement supports detailed motor speed-torque and performance characterization.
13 Dynamometer Models
HB Series dynamometers cover rated torque from 5 mN·m to 50 N·m, allowing the load unit to be matched to motor output and speed.
Up to 60,000 r/min
Selected HB-50MN, HB-100MN, and HB-200MN models support rotational speeds up to 60,000 r/min for high-speed motor testing.
Hysteresis-Brake Loading
The HB Series uses hysteresis brakes to provide smooth and reproducible loading over a wide range of motor operating conditions.
Torque, Speed and Brake Control
DM5001 supports torque servo control, speed servo control, and open-loop brake-current control according to the measurement sequence.
Four Dynamometers per Controller
A single DM5001 controller can connect to up to four HB Series dynamometers, simplifying multi-range motor test installations.
External Sensor Measurement
The optional I/O interface enables simultaneous measurement of signals such as motor coil temperature or airflow together with torque and speed data.
Power Meter Integration
Compatible power meters can provide voltage, current, power, efficiency, power factor, and frequency measurements alongside mechanical performance data.
Motor Performance Characterization
Measurement of torque, speed, output power, and efficiency
across motor operating conditions.
Speed-Torque Curve Measurement
Evaluation of motor torque characteristics over controlled
rotational speed and load conditions.
Motor Efficiency Testing
Combined mechanical and electrical measurement for calculating
motor efficiency when used with a compatible power meter.
Motor R&D and Validation
Comparative testing of motor designs, control parameters,
operating conditions, and performance characteristics.
Production Quality Testing
Repeatable torque and speed evaluation of motors for production
inspection and quality assurance.
Endurance Testing
Programmable operating sequences support motor endurance
evaluation over defined torque and speed conditions.
DM5001 System Specifications
| Torque Sampling Rate | 1 ms, 16-bit A/D conversion |
|---|---|
| Torque Averaging | 100 ms moving average |
| Torque Accuracy | ±0.1% of full scale after system calibration |
| Rotation Speed Accuracy | ±0.01% ±2 digits |
| Torque Control | Servo control of torque value |
| Speed Control | Servo control of rotational speed |
| Brake Control | Open-loop brake-current control |
| Mechanical Output Calculation | Torque × rotational speed |
| Analog Torque Output | ±10 VDC at torque-range full scale |
| Analog Speed Output | ±10 VDC at speed-range full scale |
| Power Requirement | 100–240 VAC, 50/60 Hz |
| Power Consumption | 30 VA |
| Operating Temperature | 0–40°C |
| Operating Humidity | 20–90% RH, no condensation |
| Dimensions | 430 × 148 × 360 mm (W × H × D) |
| Weight | 8 kg |
HB Series Dynamometer Selection
| Model | Maximum Torque | Maximum Speed | Short-Term Power Rating | Continuous Power Rating | Standard Motor Jig |
|---|---|---|---|---|---|
| HB-5MN | 5 mN·m | 40,000 r/min | 7.5 W | 1.5 W | MMJ-7C |
| HB-10MN | 10 mN·m | 40,000 r/min | 15 W | 3 W | MMJ-7C |
| HB-20MN | 20 mN·m | 40,000 r/min | 30 W | 6 W | MMJ-7C |
| HB-50MN | 50 mN·m | 60,000 r/min | 75 W | 15 W | MMJ-7C |
| HB-100MN | 100 mN·m | 60,000 r/min | 120 W | 25 W | MMJ-7C |
| HB-200MN | 200 mN·m | 60,000 r/min | 170 W | 35 W | MMJ-7C |
| HB-500MN | 500 mN·m | 50,000 r/min | 300 W | 60 W | MMJ-9C |
| HB-1N | 1 N·m | 30,000 r/min | 400 W | 80 W | MMJ-9C |
| HB-2N | 2 N·m | 30,000 r/min | 900 W | 400 W | MMJ-10C |
| HB-5N | 5 N·m | 20,000 r/min | 1,500 W | 300 W | MMJ-10C |
| HB-10N | 10 N·m | 12,000 r/min | 3,000 W | 700 W | MMJ-12B |
| HB-20N | 20 N·m | 12,000 r/min | 6,000 W | 1,200 W | MMJ-12B |
| HB-50N | 50 N·m | 7,000 r/min | 12,000 W (3 min) | 4,000 W | Custom fixture |
Selecting an HB Series Dynamometer
Select the dynamometer according to the motor's required torque, maximum rotational speed, and expected absorbed power rather than torque rating alone.
Low-torque models provide high-speed capability for compact motors, while higher-torque models provide increased braking and power absorption capacity for larger motors. Optional low-speed encoders are available when measurements must extend below the standard rotational-speed range.
System Configuration
A complete DM5001 motor dynamometer system combines the controller, an appropriately rated HB Series dynamometer, TORQuick software, motor mounting hardware, and optional electrical or auxiliary measurement equipment.
The HB Series dynamometer is selected according to required torque, motor output power, and rotational speed. Standard MMJ-series motor mounting jigs simplify motor alignment, while customized fixtures can be provided when standard mounting hardware is not suitable.
DM5001 Controller
Provides torque and speed measurement, dynamometer load control, analog outputs, and communication with the measurement software.
HB Series Dynamometer
Hysteresis-brake load unit selected according to motor torque, speed, and power requirements.
TORQuick Software
PC-based software controls the test sequence and supports motor performance measurement and analysis.
MMJ Motor Mounting Jig
Adjustable motor mounting fixtures support alignment between the motor shaft and dynamometer shaft.
Power Meter Integration
Compatible Yokogawa and HIOKI instruments can provide electrical input measurements for motor power and efficiency evaluation.
Optional I/O
Additional analog and digital I/O supports temperature, flow, external control, and other auxiliary measurements.
