Phase Difference Torque Detector
TH-2000/1000 series |
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The TH-1000 series torque detectors employ a new
magnetic phase difference method with improving
functionality while maintaining the advantages of
Ono Sokki’s conventional torque detectors. They
incorporate high durability and long service
life---the biggest features of our torque detectors.
The new magnetic phase difference method does not
require AC power supply to an auxiliary motor for
rotation detection change. TH-1000 series is a standard type torque detector with the rotation speed range up to 6000 r/min. The TH-2000 series is a high-speed rotation type which can be used for torque characteristic test of high-speed rotating motor such as an EV/HEV motor, a centrifuge machine or the like. The
characteristic data of the detector can be
automatically set up on the TH-5100 torque meter
when power is turned on.
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| TH-2000/1000 series is used in combination with the TH-5100
Digital Torque Meter. |
TH-5100 Digital Torque Meter |
The TH-5100
torque meter is designed for exclusive use with the
TH series, and can convert the phase difference
signal from the TH series detectors into torque
value. Rotation speed which is measured by an optional
rotation detector attached to a torque detector can be
displayed on the meter as well as torque value. By
incorporating the TH-0510 power calculation display
function (option), power output value (W) can be
calculated from torque and rotation. Moreover, the
TH-5100 features various types of output functions such
as analog output, BCD and RS-232C, which are so helpful
for data recording or data processing. Being compact in
size, it takes up less space in panel mounting use. |
Features
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High accuracy: ±0.1% / F.S.
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Suitable for torque characteristic test for high-speed rotating body up to 20,000 r/min.
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Long service life: Non contact phase
difference method adopted in the rotating and the signal
detecting section.
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Superior noise withstanding: Line driver
output with strong noise immunity
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Switching of the rotation direction (CW/CCW)
is no longer required.
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High-speed analog output, updating every 50µs
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Long distance cable extension up to 50m (matching not required)
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CE marking
Detection principle
of the New Magnetic Phase Difference method
The above drawing shows the interior structure
of a torque detector. It is configured with a
rotating shaft, phase difference plates where a
drive coil and detection coils are located face
to face. A magnetic signal that flows from the
excited drive coil to the phase difference
plates is converted into an electric signal by
the two detection coils. When torque is applied
to a rotating shaft, the rotation torque is
twisted. Change of torsion angle appears as a
phase difference of magnetic flux in the
magnetic circuit. The magnetic signal is
converted into voltage signals by the two
detection coils and amplifier while the drive
coil is excited. And then, the TH-5100 torque
meter calculates the torque value from the phase
difference.
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System Configuration
Overview Specification
•TH-1000 series
| Model name |
Torque capacity |
Applicable rotation range |
Inertia moment |
Spring constant |
TH- |
N･m |
r/min |
kgm2 |
N･m/rad |
| 1204 |
2 |
0 to 6,000 |
6.95 × 10－5 |
1.67 × 102 |
| 1504 |
5 |
0 to 6,000 |
6.95 × 10－5 |
4.12 × 102 |
| 1105 |
10 |
0 to 8,000 |
7.70 × 10－5 |
7.75 × 102 |
| 1205 |
20 |
0 to 8,000 |
7.70 × 10－5 |
1.57 × 103 |
| 1505 |
50 |
0 to 6,000 |
1.19 × 10－3 |
6.18 × 103 |
| 1106 |
100 |
0 to 6,000 |
1.19 × 10－3 |
1.27 × 104 |
| 1206 |
200 |
0 to 6,000 |
1.34 × 10－3 |
2.54 × 104 |
| 1506 |
500 |
0 to 6,000 |
1.34 × 10－3 |
6.18 × 104 |
•TH-2000 series
| Model name |
Torque capacity |
Applicable rotation range |
Inertia moment |
Spring constant |
TH- |
N･m |
r/min |
kgm2 |
N･m/rad |
| 2204 |
2 |
0 to 20,000 |
6.95 × 10－5 |
1.67 × 102 |
| 2504 |
5 |
0 to 20,000 |
6.95 × 10－5 |
4.12 × 102 |
| 2105 |
10 |
0 to 20,000 |
7.70 × 10－5 |
7.75 × 102 |
| 2205 |
20 |
0 to 20,000 |
7.70 × 10－5 |
1.57 × 103 |
| Accuracy |
±0.1 % （display average
value per 1-second, static calibration） |
| Critical torque |
180 % of rated torque |
| Breakdown torque |
400 % of rated torque |
| Influence of temperature on sensitivity |
0.02% / °C/ F.S |
| Influence of temperature at zero point |
0.02% / °C / F.S. |
| Applicable rotation detector |
MP-981（option） |
| Operating temperature range |
0 to ＋40 °C |
| Storage temperature range |
－20 to ＋60 °C |
| Operating humidity range |
95 % RH or less |
| Vibration resistance |
50 m/s2 or
less |
| Gear teeth for rotation detector |
Provided as standard
accessory （60 P/R） |
| Power requirement |
Supplied from the
TH-5100 Digital Torque Meter |
| Accessories |
Instruction manual x 1
copy, calibration chart x 1 copy |
Option |
・Torque signal
cable (TH cable)
| Model name |
Length （m） |
| TH-0105 |
5 |
| TH-0110 |
10 |
| TH-0120 |
20 |
・MP-981 Magneto-electric rotation
detector
・MX-8100 series rotation signal cable
| Model name |
Length （m） |
| MX-8105 |
5 |
| MX-8110 |
10 |
| MX-8120 |
20 |
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Note: The TH-5100 Digital Torque Meter is used
in combination.
Specification of the
TH-5100 Digital Torque Meter
| Torque input section |
Input signal |
Output signal from the
TH-1000 series torque detector |
| Rotation speed input section |
Input signal |
Output signal from the
MP-981 rotation detector |
| Input frequency |
1 Hz to 100 kHz（accuracy
assurance: from 10 Hz） |
| Power requirement |
12 ± 0.6 VDC, 100 mA max |
| Applicable connector |
R03-PB6M（TAJIMI
ELECTRONICS CO., LTD） |
| Display section |
Display device |
LED 7-segment |
Display items |
Torque, rotation speed |
Display range |
Torque: -99999 to 99999
Rotation speed: 0 to 99999 |
Display / output update time |
1 s / 10 s / external
gate (TRIG IN signal) |
Display unit |
Torque: N・m
Rotation speed: r/min |
Display accuracy of torque |
± 0.1% / F.S. ± 1
count（1-second average value） |
Display accuracy of rotation speed |
± 0.02% / F.S. ± 1
count（1-secondaverage value） |
| Analog output section |
The number of channels |
2 channels |
Output items |
Torque, rotation speed |
| Output format |
Isolated voltage output
(Common is shared between 2 channels.) |
Output voltage |
±10 V |
| Time constant |
Torque ：Selectable from
500 ms, 63 ms, 16 ms or 1.6 ms
Rotation speed：0.16 ms |
| Temperature drift |
±0.01% / F.S. / °C |
Update time |
50 μs |
| Applicable connector |
CO2 type (BNC) plug |
| BCD output section |
The number of channels |
2 channels |
Output items |
Torque, rotation speed |
Output update time |
1 s / 10 s / external
gate （TRIG IN signal） |
Output format |
Positive logic open
collector output |
Applicable connector |
DX40-50P（HIROSE ELECTRIC
CO.,LTD） |
| RS-232C |
Baud rate |
9600 bps（fixed） |
| Functions |
Input of setup
conditions, output of value display / setup status |
| Applicable cable |
AX-5022 (Ono Sokki, 2 m ) |
| Remote function |
Input items |
Trigger input / clear
input / torque polarity change |
Output items |
Trigger output / READY
output (ready to measure signal) |
| Input format |
No-voltage contact input
or logic input |
| Output format |
No-voltage contact output |
| General specification |
Power requirement |
100 to 240 VAC, 50/60 Hz |
| Power consumption |
Approx. 12 VA or less
（100 VAC） |
| Isolation resistance |
500 VDC at megohm 10 MΩ
or more |
| Withstand voltage |
1500 VAC, one minutes |
| Operating temperature range |
0 to +40 °C |
| Storage temperature range |
-10 to +55 °C |
| Outer dimensions |
76 (W) × 142 (H) × 302
(D) mm (not including protruded section) |
| Weight |
Approx. 2 kg |
| Accessories |
Unit label, connector for
remote, four rubber foots, power cable (1.9m), instruction
manual |
■Option
TH-0510 Power calculation display function |
| Calculation |
Power(W)=2p/60 × torque (Nm) × rotation speed (r/min) |
| Display |
Selective display |
rotation (fixed), torque or power (selectable) |
| Display range |
-99999 to +99999 |
| Unit |
W, kW, mW (available to stick a unit label |
| Accuracy |
Torque display accuracy + rotation speed display accuracy |
| Output |
Selective output |
Output can be selected from torque or power output in both analog output and BCD output. |
Time constant |
Depending on the torque setup |
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TH-0511 High-speed analog output function |
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Overview |
The TH-0511 improves the response ability and the filter function of the TH-5100.
The time constant of analog output can be selected up to 0.16 ms (additional three choices: 0.16/0.4/0.8).
It makes it possible to measure torque ripple in high-speed rotation and see the relation of input current and output torque of the motor.
The new digital low-pass filter enables extraction of torque fluctuation signals accurately, which makes damping rotation torsional resonance of a sensor and an object so much. The frequency of the filter setup is selectable from 50 Hz to 5 kHz (five choices: 50/100/500/1k/5k) depending on your application.
This optional function can make a measurement of rotating speed closer to the actual status and greatly helps improvement of motor performance and efficiency in R&D, or delivery inspection. |
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Specification |
The followings are added to the setup menu of the time constant of analog output.
Output time constant: 0.16/0.4/0.8 [ms]
Digital low pass filter: 50/100/500/1k/5k [Hz] |
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Measurement example |
Frequency analysis of cogging torque of a DC brushless motor (12 poles) in 200 to 3000 r/min (The time constant: 0.16 ms)
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Revised: 2011/12/01
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