Small, high-rigidity torque detector
RHシリーズ
Expanding the scope of "measuring" and measuring the torque of various products.
In the automotive industry, electrification is progressing rapidly, and many types of motors are being used. There is a demand for motors that minimize cogging torque and torque ripple, which are causes of vibration and noise.
Therefore, a highly rigid torque sensor capable of accurately capturing torque fluctuations is required. Meanwhile, overseas, there is a growing demand for high-speed rotation specifications in motors for EV scooters and air conditioning compressors.
We have developed a torque detector that can meet these requirements.
High precision: Enables accurate performance evaluation tests of motors and other components.
Linearity, including hysteresis, can be achieved at ±0.05% FS (half of our previous standard), enabling highly accurate measurements.
High precision: Enables accurate performance evaluation tests of motors and other components.
For EPS motors, an accuracy of 1% relative to the torque capacity is required.
Furthermore, the torque sensor requires the next lower digit.
(If the torque capacity is 6 N·m, then 0.1% of 6 N·m = 0.006 N·m.)
A torque detector with a torque capacity of 10 N·m will have an accuracy of 0.06% FS.
We have developed a torque detector that can meet this requirement.
Dimensional comparison with the SS series
SS Series Torque Detector
Axle length: 220 mm
Body width: 117 mm
Height: 167 mm
Center height: 50 mm
Mass: approx. 5.5 kg
RH Series Torque Detector
Shaft length: 119 mm
Body width: 108 mm
Height: 125 mm
Center height: 50 mm
Mass: approx. 2 kg
Application examples of the compact, high-rigidity torque detector RH series
Graduate School of Frontier Sciences, The University of Tokyo
To minimize "iron loss" generated by the motor, a custom-made motor bench was used to investigate the mechanism.
| RH-1105 | RH-1205 | |
|---|---|---|
| Power supply voltage | DC 24V (18-30V) | |
| Power consumption | 20W or less | |
| Power input connector | R03-RB12F | |
| Operating temperature range | 0～+50 °C | |
| Operating humidity range | 20-85%, provided there is no condensation. | |
| Storage temperature range | -10 to +60 °C | |
| Storage humidity range | 20-85%, provided there is no condensation. | |
| CE marking |
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| FCC | FCC Part 15 Subpart B Class A | |
| ICES | ICES-003 Issue7 + Amendment1 ClassA | |
| safety | IEC61010-1: Overvoltage Category I, Earth Protection Class III, Pollution Degree 2 | |
| Torsional rigidity (design value) | 10 N·m: 3.6 kN·m/rad | 20 N·m: 6.9 kN·m/rad |
| Moment of inertia (design value) | 10 N·m: 24.3 × 10⁻⁶ kg·m 2 | 20 N·m: 24.6 × 10⁻⁶ kg·m 2 |
| Rated rotational speed (standard) | 16,000 r/min | |
| Rated rotational speed (Optional RH-0502 when adjusting balance) |
20,000 r/min | |
| Outline drawings |  |
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| Accessories | Instruction manual, inspection chart, key | |
(1) To ensure accurate measurement, it is recommended to perform a zero torque correction at the start of measurement.
(2) Do not use in environments that exceed the specified temperature and humidity limits.
(3) When using or storing the product for extended periods, avoid high temperature and high humidity environments, as this may affect its performance.