Small high-rigidity torque detector

RHシリーズ

In the automotive industry, as electrification rapidly advances and many motors are used, motors that minimize cogging torque and torque ripple, which cause vibration and noise, are in demand. Therefore, a highly rigid torque detector that can accurately capture torque fluctuations is required.
The RH series achieves approximately 4.5 times the torsional rigidity compared to our products, allowing for accurate measurement of torque fluctuations.

This is an example of measuring torque fluctuations of the RH torque detector and a general low-stiffness torque detector using the CF-9400A FFT analyzer.

The above graph shows the frequency analysis results of torque fluctuations for the RH torque detector and a typical low-stiffness torque detector.
Because the RH torque detector has higher torsional stiffness compared to the typical low-stiffness torque detector, it can raise the device's resonance frequency, allowing for accurate measurement of the torque that is originally intended to be measured (in this case, torque ripple caused by the primary component of cogging torque).
Additionally, the RH torque detector has achieved smoother and flatter measurements up to higher frequencies.

There is a growing demand for high-speed rotation in motors for applications such as EV scooters and air conditioning compressors. The RH series can measure rotation speeds up to 20,000 r/min, which is about 2.5 times higher than our previous models, allowing for stable measurements from low to high speeds.

Traditionally, it was necessary to use a torque detector in combination with a computing display unit, but now it is possible for the torque detector to output signals independently. This contributes to cost reduction.

The product has become very easy to handle due to its miniaturization, lightweight design, counterless feature, and uniform center height, making replacement simple.

	RH-1105	RH-1205
power supply voltage	DC 24 V (18–30 V)
power consumption	20 W or less
Power input connector	R03-RB12F
Operating Temperature Range	0～+50 °C
Operating Humidity Range	20 to 85% humidity; however, there must be no condensation.
Storage Temperature Range	-10 to +60 °C
Storage Humidity Range	20 to 85% humidity; however, there must be no condensation.
CE marking	Low Voltage Directive: 2014/35/EU Standard EN61010-1 EMC directive: 2014/30/EU Standard EN61326-1 RoHS Directive: 2011/65/EU, standard EEN IEC 63000 * (EU) 2015/863 adds four substances.
FCC	FCC Part 15 Subpart B Class A
ICES	ICES-003 Issue 7 + Amendment 1 Class A
safety	IEC61010-1: Overvoltage Category I, Ground 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 revolutions per minute
Rated rotational speed (Option RH-0502 during dynamic balancing adjustment)	20,000 r/min
Outline Dimensions
Accessories	Instruction manual, inspection chart, key

(1) To measure accurately, it is recommended to perform a torque zero 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 for long periods, avoid high temperature and humidity environments. This may affect performance.

最終更新日:2025/09/03