Motor Testing Equipment
Torque and speed
Torque range 5 mN·m–50 N·m
Speed range 5–60,000 r/min

Torque and speed for ultrahigh-speed motor
Maximum torque 100 mN·m
Maximum speed 120,000 r/min

Pull-in torque and pull-out torque
Cogging torque and torque ripple

Sugawara’s Dynamometers
use hysteresis brakes.
A hysteresis brake is a high-performancebrake used in dynamometers to achieve highmeasurement accuracy. It generates a stableload torque according to the strength of theexcitation current regardless of rotation speed.

■Hysteresis brake features●High-accuracy control●Maximum speed 60,000 r/min

Stable load control from low-speed to high-speed rotation*Maximum speed depends on torque rating and model.

●Structure that minimizes the inertia moment of the rotor●Long life owing to a non-contact brake●Excellent thermal properties—torque not easily affectedby temperature rise in the brake or surroundings●Compact configuration compared with motor brakes

Dynamometer System
Torque accuracy

DM5001 / HB-N Series± 0.1%●Speed accuracy ± 0.01%●Maximum speed 60,000 r/min

Dynamometer using a reliable hysteresis brakewith superb reproducibility unaffected by inertia
Improved measurement accuracy and ease of use
Expanded lineup of convenient functions
and strong production-line/development-bench support●Simple start-up without the need for PID settings●Simple, software-based torque calibration●Simultaneous measurement of temperature, flow rate, etc. by adding an I/O option●Four measurement units can be connected with a single controller●Endurance tests along time axis enabled by evolved measurement modes■Hysteresis brake principles
StatorHysteresis brake
Coil

Frame

Encoder

Bearing

Load cell

Rotor

Hysteresis brake structure

A hysteresis brake is structured to rotate a rotor made of highpermeability magnetic material inside an air gap containing amagnetic field formed by a cog-wheel-shaped stator. The
magnetic flux flowing in the stator passes through the rotor,
creating magnetic friction between the rotor and the stator, andacting as a non-contacting brake. This magnetic friction is
proportional to the strength of the magnetic flux penetrating therotor, and the strength of this magnetic flux can be adjusted bychanging the strength of the exciting current applied to the coil.
Therefore, a hysteresis brake makes it easy to adjust thebraking force regardless of the rotation speed of the rotor.

Torque detector structure

The brakes of HB-N series Dynamometers are supported
by bearings on the equipment frame. When the rotor isrotated by the motor under measurement and braked bymagnetic friction with the stator, a reaction force isgenerated on the stator and the stator tries to rotate. This
reaction force is detected by a load cell as the brake
torque. Since the rotational moment acting on the stator is
detected in an extremely static fashion, it is lesssusceptible to vibration than methods that involve detecting
torque on a rotating shaft, and results in a stable detection
method that is suitable for high-speed rotation.

3

Torque and Speed Measurement

DM5001 Controller
The DM5001 controller for the HB-N series
Dynamometers demonstrates outstanding
performance in combination with TORQuick
specialized software.

■ Main features●Four HB-N Series Dynamometers can be connectedwith a single controller.

●Analog torque and speed outputs provided as
standard●Diverse expanded functions by adding an I/O option
Connections can be made with external equipments enablinga variety of expanded functions.
►Simultaneous measurement of voltage signal
inputs from external sensors

Using an analog 4 ch input (0–10 V), it is possible to simultaneously
measure and store voltage inputs from external sensors such astemperature and flow rate sensors. The scaling and unit of these
inputs are user-configurable. These input data can be plotted
simultaneously on a graph of torque measurements, and can also
be configured as pass/fail judgment criteria.

►Controls an external motor power supply

This function allows you to switch a motor’s power supply on andoff (via contact inputs). Also, if you use a power supply that has ananalog input function, the analog voltage output function allows
you to change the power supply voltage during the measurement
sequence.

■ Specifications
Analog output
Torque analog output

Max ±10 VDC ±1%
Voltage and torque are individuallyconfigurable

Speed analog output

Max ±10 VDC ±1%
Voltage and speed are individuallyconfigurable

I/O option (Optional)

Digital input 4 ch, Digital output 4 ch
Analog input 4 ch, Analog output 2 ch
Contact output for power supply
control (NO, NC) 1 ch

InterfaceUSB 2.0 or greater (Type A)

Temperatures

0–40°C

Humidity

20–90%RH,
without dew condensation

Power requirement

100–240 VAC±10%, 50/60 Hz

Power consumption

30 VA or lessDimensions (W×H×D)

430×148×360 mm

Weight

8 kg

I/O Option

Please specify I/O options
when ordering DM5001.

DM5001 Controller■ System configuration
POWER

Controls the torque measurement unit by specialized software via
the controller●DM5001 is compatible with the following power meters for voltage and

POWER

current measurements.

COGGING TORQUE & TORQUE RIPPLE TEST SYSTEM

ATV-100

DM5001 Controller

Yokogawa Test & Measurement Corporation
HB-N Series Dynamometers

WT5000 Precision Power Analyzer (*1),
WT1800E/WT1800 High-Performance Power Analyzer
WT300E/WT300 Digital Power Analyzer

HIOKI E.E. CORPORATIONPower Analyzer PW3390
Power Meter PW3335/PW3336/PW3337(*2)

TORQuick CT

Software4

WT1800E High-Performance
Power Analyzer, etc.
(Optional)*1 Select WT1800E from the command type settings of WT5000.
A maximum of 6 elements can be used. Supports only the 760901 and 760902 elements.
*2 In current measurement, supports only measurements using the current input terminals.

Software
TORQuick CT
TORQuick software for motor evaluation is developed with the user in mind.
It can measure a variety of motor speed/torque characteristics in combination with a Dynamometerand can manage and store data on Windows. Its user-friendly, highly sophisticated interface enables
high-accuracy measurements through simple operations.

■ Main features●User-friendly graphical user interface

The graph displays 5 axes × 3 items in real time. We have improved the operability of this display by adding a graph axis auto setting function.
You can also customize the graph line style and dot appearance. It is also easy to change the power analyzer settings in the software.

Measurement graph

Power meter settings●Automatically recognizes the models of the connected Dynamometers●More than 60 measurement items

Torque / Speed / Time / Output power / Direction of rotation / Voltage / Current / Electric power /Efficiency / Power factor / Voltage frequency / Current frequency etc.

●Diverse measurements according to use►High accuracy point measurementswith simple settings►Sweep measurements enabling
continuous measurements►Load simulations envisioning
actual usage

S-T characteristics (speed–torquecharacteristics) can be measured by simply
setting measurement points. Torque control,
speed control, and brake control can be
combined within one measurement. The data
is not affected by moment of inertia because
it measures values at stable operating points.

In addition to point measurements, sweep
measurements that continuously vary control
values can be performed. Measurement time
can be set as desired, which is suitable formaking measurements over a short period tosuppress heating effects.

A variety of tests such as endurance tests
and cycle tests can be performed. This
enables load simulation tests that envision
actual usage conditions, and sincemeasurements can be set up to 10,000
cycles, enables endurance tests that combine
testing and idling states.

►Inspection mode specialized forpass/fail testing►Manual mode where measured
values are displayed in real time

■ Operating conditions

Pass/fail testing can be performed by setting
the upper and lower limits for up to fivemeasurement items based on torque, speed
or braking. By specifying a file name inadvance, you can automatically generate afile listing the time, sequence number andresults of each measurement.

In this mode, you can set and control thetorque, speed or braking at a single point,and display all the corresponding measured
values in real time. This mode can be used
for simple behavior observations and for themeasurement of starting torque.

OS

Windows10 (64bit)
Professional
Japanese or English version

CPUIntel Core i5 or later processor

Memory8 GB or more recommended

HDD

256 GB or more recommended

MonitorHD FWXGA 1366×768 or greater

DVD drive

One or more units(required for software installation)

Com. Ports USB port × 1
When connected to a power meter,
the following are required separately:
Yokogawa WT Series: USB × 1
HIOKI PW Series: LAN (Ethernet
100BASE TX) × 1

5

Torque and Speed Measurement

HB-N Series Dynamometers■ Main features●Measurement accuracy at industry's highest level
Torque accuracy: ±0.1% of the rated torque *1
Speed accuracy: ±0.01%●Adopts a high-reliability hysteresis brake

The hysteresis brake used here has a long track record of highreliability due to an original structure developed by Sugawara.
This structure improves torque control performance and reduces
vibration during rotation by narrowing the gap between the rotor
and stator and minimizing the inertia moment of the rotor.

●Stable measurement from low-speed to high-speed
Stable measurements can be performed from low-speed tohigh-speed regions because it detects torque from the force of
movement of the brake’s stator. The maximum speed is 60,000
r/min (speed differs according to torque rating). An optional rotary
encoder for the measurement of extremely low speeds supports
10–10,000 r/min (600 P/R) and 5–5,000 r/min (1200 P/R).

●Extensive product lineup with torque ratingsfrom 5 mN·m to 50 N·m

13 models of Dynamometers to choose from according to motor
output power for making high-accuracy measurements●Features air bearings for low-torque models●Short base plate models and temperature chambermodels are provided as standard.

■ Dynamometer Specifications
Models

HB-5MN

HB-10MN

HB-20MN

HB-50MN

HB-100MN

HB-200MN

HB-500MN

HB-1N

Torque rating

5 mN·m

10 mN·m

20 mN·m

50 mN·m

100 mN·m

200 mN·m

500 mN·m

1 N·m

Torque detection

Brake-stator reaction force detected by strain-gauge load cell

Torque accuracy±0.1% of full scale (accuracy of the system including DM5001 Controller, after calibration) *1

Max. speed

40,000 r/min

60,000 r/min

Speed detection

50,000 r/min

Speed accuracy±0.01%

Power rating (5 min)

7.5 W

15 W

30 W

75 W

120 W

170 W

300 W

400 W

Power rating (continuous)

1.5 W

3W

6W

15 W

25 W

35 W

60 W

80 W

Brake

Hysteresis brake

Brake support
Brake rotor momentof inertia

Air bearings
kg·m 2Brake cooling

0.6×10−6

0.8×10−6

WeightBall bearings
1.0×10−6

2.6×10−6

2.8×10−5

210×246×400 mm

1.9×10−4

210×276×500 mm
20 kg

18 kg

29 kg

26 kg

AC100–240 V
30 VA or lessPower consumption
Shaft shape

9.2×10−6

Air cooling by fan

Power requirement
Shaft diameter3.9×10−6–

Dimensions (W×H×D)

Φ3

Φ4

Φ6

Φ10
D-cut

Round

160 mmShaft height

130 mmStandard motor jig

MMJ-7C

MMJ-9CΦ25–100 mm

Φ50–150 mm

Diameter of attachable motor*1: After calibration with the DM5001 Controller. Torque accuracy is ±0.25% for 1200 P/R optional models of HB-500MN, HB-1N, HB-2N, and HB-5N.
*2: All the models have two kinds of low-speed encoder options, 600 P/R type (10–10,000 r/min) and 1200 P/R type (5–5,000 r/min).

6

30,000 r/min

Rotary encoder of 60 P/R (standard models) *2*3: Power rating (3 min) for HB-50N

■ Calibration■ Power absorption curve

Calibration is necessary for measuring correct torque values.
A separately sold calibration jig set (calibration bar and weight) is used
for this purpose. The calibration bar is attached to the shaft and theweight is suspended from the end of the bar. Calibration is achieved bysimply pushing the CAL button. No volume adjustments are necessary.

The allowable time for continuous loading of the Dynamometer
varies with the power it absorbs. The Dynamometers must be
used correctly according to the following graphs of power
absorption curve. Contact us for the graphs of other models.
Continuous use beyond the limit indicated in the graphs will
make it difficult to obtain correct data and may cause damage.
For models greater than the HB-2N, the brake current is
automatically cut off to set the brake torque zero when theabsorption power exceeds the limit.

HB-200MN

200
180
160

■ MMJ-series Motor Mounting Jigs
MMJ-series Motor Mounting Jigs have an adjustment function for
centering the motor and measurement shafts. Four models areavailable for twelve measurement units ranging from HB-5MN to
HB-20N.
Since the surface of the V block of MMJ
on which the motor under test is placed isdesigned to be parallel with the shaft of
the Dynamometer, the shafts of the motor
and Dynamometer will be parallel when
they are simply mounted on the V block if
the motor body and the shaft are parallel.
As a result, alignment is easy to achieve.

POWER [W]

140
120
100
80
60
40
20
0

0

10

20

30

40

50

60

70

80

90

100

80

90

100

80

90

100

MAXIMUM TIME [min]

HB-2N

700

■Safety coverIn certain cases, an incorrectly aligned coupling may be damaged
during measurements causing it to fly off or scatter, which could
cause an injury. Always take appropriate safety measures such asattaching a safety cover. A safety cover is available from Sugawara(option).

POWER [W]

600
500
400
300
200

HB-2N

HB-5N

HB-10N

HB-20N

HB-50N

2 N·m

5 N·m

10 N·m20 N·m

50 N·m

100
0

0

10

20

30

40

50

60

70

MAXIMUM TIME [min]25,000 r/min

20,000 r/min

7,000 r/min

12,000 r/min

600 P/R
1.5 kW

3.0 kW

6.0 kW

12 kW *3120 W

0.3 kW

0.7 kW

1.2 kW

4 kW

0.5×10 −3

1.8×10−3

6.3×10−3

2.1×10−2

6.1×10−2

Cooling by fan and blower
300×325×600 mm
56 kg

63 kg

500×500
×1000 mm500×537×1245 mm

550×1300
×1300 mm

180kg

210kg

500kg

AC100 V
Φ15

Φ18

5
4
3
2
1
0

0

10

20

30

40

50

60

70

MAXIMUM TIME [min]3 Phase AC200/220 V
1kVA or less

200VA or less
Φ12

6
POWER [kW]600 W

HB-20N

7

Φ20

Φ30

Key seat
200 mm

230 mm

250 mm

MMJ-10C

MMJ-12B

Φ60–180 mm

Φ40–200 mm

Customization
available

Power (motor output power) is calculated as follows.

Power [W] =Torque [N·m] × Speed [r/min] × 0.1047

7

Torque and Speed Measurement

Short-base-plate HB-NS Dynamometers
Ideal for measuring motors with special shapes.
HB-NS is a short-base-plate type of Dynamometer in the HB-N series.
A system that combines HB-NS and customized base plates and jigs
can be built for specially shaped motors that cannot be mounted withstandard MMJ Motor mounting jigs.
Seven models to choose from with torque ratings from 50 mN·m to 5 N·m.

■Application examples●Development of specially shaped motors for pumps, power tools,
in-vehicle use, etc.

●Performance testing of a power tool

Supports measuring of motors with a long shaft
by combining with an extended base plate

Customized Jigs and Base Plates
Sugawara can propose a variety of jigs andcouplings tailored to motor model and shape tosupport the customer’s measurement needs.
Raised base plates and extended base plates are available formounting the short-base-plate type HB-NS dynamometers.

Axial fans

Cylindrical attachment

Output shaft

MMJ-C Series Motor
Mounting Jigs

Supports measuring of large-diameter motors
by combining with a raised base plate
8

Fixed type motor mounting jig

Jig set for axial fans

HB-NT Dynamometers for Temperature /Humidity Environmental Testing
POWER

POWER

POWER

CONTROLLER

DM-5001

Measures motor load characteristics ina temperature/humidity-controlled state
within a temperature chamber.
HB-NT is a Dynamometer used in combination with atemperature/humidity environmental testing instrument(temperature chamber).
It can be used to perform simulation tests, endurance
tests, etc. under diverse environmental conditions.

■ Main features●Enables high-accuracy measurements by directly
attaching the temperature-chamber motor
mounting jig to the Dynamometer to correctlyalign the measured motor.

●Enables simultaneous plotting of chamber■Application examples●Development/evaluation of motors for continuously variable
valve-lifting (CVVL) systems in automobile engines●Understanding change in torque characteristics under
low/high-temperature environments for various
vehicle-mounted motors and actuators

temperature, motor winding temperature, etc. on
the torque measurement graph using an optional
I/O module.

●Can be used as an ordinary Dynamometer byattaching a standard MMJ Motor Mounting Jig.

●Seven models to choose from with torque ratingsfrom 50 mN·m to 5 N·m.

●All seven models have the same size enablingcommon use with one temperature chamber.

Effective for evaluating power-window motors, etc.

Low-speed Measurement Option
Minimum Rotation Speed 5 r/min
Two options are provided for low-speed
measurements.
HB-*e6: 10–10,000 r/min
HB-*e12: 5–5,000 r/min
In addition to evaluating geared motors and near-stall
performance of motors, it can be used for measuringpull-out torque of stepper motors. This option can beselected for all HB-N series models including HB-NSand HB-NT (only e12 for the HB-50N model).

■Application examples●Motor development/evaluation● In-wheel motor for automated guided vehicle (AGV)● Hollow-shaft motors for industrial robots● Motors for automobile seat adjusters● Motors for automobile door-mirror drivers● Motors for audio use●Measurement of pull-out torque in actuators (stepper motors)
for surveillance cameras

Enables measurement of low-speed motors such as
hollow-shaft motors for industrial robots
9Torque and Speed Measurement

EMA-100 / EMM-100M
Ultrahigh-Speed Motor Torque Tester
Measures ultrahigh-speed motors usinga hysteresis brake

120,000 r/min
There is a growing demand for increasing the speed of
motors for use in automobiles, home appliances, andother fields. High-speed operation enables high output
without increasing size and a compact configuration
while maintaining output.
EMA-100

Sugawara’s EMA-100/EMM-100M Ultrahigh-Speed
Motor Torque Tester features a built-in small-diameter,
low-inertia hysteresis brake enabling measurement ofrotation speeds up to 120,000 r/min.

EMM-100M■ Main features●Max. speed 120,000 r/min, max. torque 100 mN·m.
●Stable load control from motor stall to ultrahighspeed using a newly developed hysteresis brake.

●Low brake rotor inertia for ultrahigh speed●Simplified setup requiring no PID settings●Safe and simple measurement using a highly■Application examples●Development/evaluation of motors for vacuum cleaners,

dental handpieces, etc.
Performance testing of grinding machines and other cutting
tools

●

accurate motor fixture and novel coupling.

●Connected to the power meter, it displays 22

measurement parameters including torque,
speed, voltage, current, efficiency, and power
factor in real time

●A variety of torque control modes, including

Enables measurement of high-speed motors
for dental handpieces, etc.

point measurements, sweep measurements,and load simulation tests.

■ System configuration

Specialized Windows software saves measurement values
and graphs. Operations can also be performed by software.
POWER
CANCEL

POWER

EMA-100 Motor Analyzer●DM5001 is compatible with the following power meters forvoltage and current measurements.

MOTOR ANALYZER EMA-100

EMM-100M Dynamometer

Yokogawa Test & Measurement Corporation

WT5000 Precision Power Analyzer (*1),
WT1800E/WT1800 High-Performance Power Analyzer
WT300E/WT300 Digital Power Analyzer

10

CD-EMA-100
Software

WT1800E High-Performance
Power Analyzer, etc.

(Optional)(Optional)*1 Select WT1800E from the command type settings of WT5000.
A maximum of 6 elements can be used. Supports only the 760901
and 760902 elements.

■EMA-100 measurement examples
The use of a hysteresis brake enables applying load torquethat is stable in all speed regions from no-load rotation to
motor stall enabling correct motor measurements. No PID
settings are necessary and measurement conditions areeasy to set. Control by torque, speed, and brake amount
can be freely combined to perform tests simulating actual
usage conditions.

Measurement graph of load
characteristics of motor having
a maximum speed of 90,000 r/min■Calibration

Graph of load simulation

Calibration can be performed in Calibration Mode on the
EMA-100 by attaching a calibration bar to the EMA-100
shaft and hanging a weight from the bar.

Calibration Mode display■Coupling and motor fixture supports correct measurements
A novel coupling (patented) based on new technology
enables stable fixing of ultrahigh-speed rotating shafts.

PC3-MLH2
The motor fixture can adjust XYZ
positioning in micrometer units,
enabling precise alignment essential
to ultrahigh-speed measurements.

■ Power absorption curve■Specifications
Max. speed

120,000 r/min

Speed accuracy±0.01%+1digit

Torque rating

100 mN·m

Torque accuracy±0.5% of full scale

100

Brake

Hysteresis brake

10
0.1

Power absorption

Continuous
80 W
Within 10 sec 600 W
Within 5 sec 1000 W

Diameter of attachable motorΦ10–60 mm

POWER (W)

10000

1000

1

10
100
MAXIMUM TIME (sec)1000

Dynamometer continuous measurement time differs according to
the motor’s output power.
Please refer to the above characteristics chart.

Measurable motor shaft diameter 3–5 mm
Power requirement

AC100–240 V±10 V, 50/60 Hz

Dimensions (W×H×D), weight

EMM-100M: 230×250×400 mm, 16.5 kg
EMA-100 : 315×218×400 mm, 14 kg

11Pull-in and Pull-out Torque Measurement

SMC-2 / SMT-2 Stepper Motor Torque Tester
This tester uses the Prony braking (thread winding)method which is most commonly used in stepper motor
measurements. Combined with a specialized software,
it can measure pull-in and pull-out torque automaticallywith high precision.

■ Main features

moment of inertia of the tester●ByMinimal
adopting Prony braking, the system provides stablemeasurement unaffected by moment of inertia of the tester andcoupling loss, which is unavoidable in conventional torque testers.
The advantage is obvious especially in pull-in torque testing. The
resulting data has a high correlation with the data by traditional
double balance method.

■ Micro stepper motor measurements
The SS-R2N supersensitive sensor set is now available.
Capable of making stable and precise measurements of small
stepper motors at torque values less than 0.1 mN·m. Has also beenused successfully in measuring micro stepper motors at less than
0.002 mN·m. Can be used to measure lead-screw motors.

Definition-based measurement●Achievesstable step-loss detection using a Sugawara-developed
algorithm. Enables sensitivity of step-loss detection to be selectedaccording to step angle. The pull-in torque is measured exactly
according to its definition: the maximum torque at which the motor
can start from the holding state without losing steps.

Broad measurement range●Eightmodels of Sensors, from 0.2 N to 50 N, allow wide range ofhigh-precision measurement. In addition, selecting and using anappropriate pulley enables measurement of micro motors under
0.1 mN·m and 1N·m motors too. Specialized Windows software
makes pulley diameter and other settings easy.

* Any of eight models of sensors can be installed in the Stepper Motor Tester

Easy-to-see presentation●Motorcharacteristics are easily seen on automatically plotted

Frequency-Torque curves. Data can be overlaid on the graph up
to four data sets. Torque values at any frequency can be readusing a cursor function.

Can be controlled by standard personal computers●Allows
control of measurement, display, and storage of data bystandard personal computers running Windows. Data is stored in
CSV file format enabling it to be read by other applications.

■Sample measurement data

▲Pull-in and pull-out torque curve of a low
torque (0.2 mN·m or less) micro stepper
motor. (Linear scale)
X axis: frequency Y axis: torque12▲Pull-in and pull-out torque curve of a five-phase
stepper motor. (Logarithmic scale)
X axis: frequency Y axis: torque▲Numerical data display

■ System configuration
Motor under test

Motor driver

PulleyF1Brake thread

Fixed sensor

F2

Moving sensor
Motor fixture
POWER
FREQUENCYMICRO STEPPER MOTOR TESTER

RS-232CSENSOR

SMT-2
SMC-2

SMT-2 Micro Stepper Motor Tester
SS-N Sensor Set

SMC-2 Controller

PC■Torque range■ Load-torque detection system(mN·m)

SensorSensorRating
(N)

1

5

10

20

40

SS-R2N

0.2

0.1

0.5

1

2

4

SS-R5N

0.5

0.25

1.25

2.5

5

10

SS-1N

1

0.5

2.5

5

10

20

SS-2N

2

1

5

10

20

40

SS-5N

5

2.5

12.5

25

50

100

After accelerating the motor to the measurement frequency,
the load is gradually increased. The value detected immediately
prior to step loss is taken to be the pull-out torque.

SS-10N

10

5

25

50

100

200

SS-20N

20

10

50

100

200

400

Pull-in torqueSS-50N

50

25

125

250

500

1000

Detects tension in brake thread with two sensors to calculate torquevalue. Denoting the forces detected by these two sensors as F1 andF2 [N] and the radius of the pulley including the brake thread as R[mm], torque T [mN·m] is calculated as R×(F1-F2) [mN·m].

■Automatic measurement method

After detecting the motor’s rotation direction, this method firstmeasures pull-out torque and then pull-in torque from low
frequencies according to settings.

Pull-out torqueThe drive pulse of the set frequency is output to the motor inholding state after pull-out measurement, and thepresence/absence of step loss is detected. Load is thenincreased or decreased depending on that result and the drive
pulse is again output to detect the presence/absence of step
loss. Repeating this process determines the maximum load
torque at which synchronized rotation is possible, which is taken
to be the pull-in torque.

■Specifications
Load method

Prony braking

Sensor rating

8 types: 0.2/0.5/1/2/5/10/20/50 N

Torque accuracy

Within ±1% of torque range

Begin measurement

Maximum allowable load

200% of Sensor rating

Rotate motor
at measurement frequency

Torque measurement
range

Torque range:
T=Sensor Rating × Pulley Diameter/2(refer to the torque range on the above)

Torque analog output
from SMC-2

DC 2 V/torque rating

Drive frequency range

16 Hz–50000 Hz

Drive signals for MUT

Square wave (duty 1:1), TTL-level
Voltage signal or open-collector signal

Compatible personal
computer

IBM PC/AT-Compatible

OS

Windows10 (64bit) Professional
Japanese or English version

Com. Ports

RS232C serial port

Raise load
torque gradually
Take torque value
immediately prior to step loss
as pull-out torquePull-in torquemeasurement is required

Lower load
torque slightly

Pulley Diameter (mm)Output pulse of measurement
frequency for set time

Raise load torque slightly

Step loss detectedduring pulse output

Store torque value
as pull-in data

Pull-in data is already stored
Take last stored data
as pull-in torque

Power requirement

Last setmeasurement frequency

Power consumption

50 VA or lessEnd measurement

Dimensions (W×H×D)
and weight

SMT-2: 450×200×370 mm 12 kg
SMC-2: 430×132.6×360 mm 9 kg
S-N : 80×122×66 mm
0.9 kgAC 100–120 V, 50/60 Hz
AC 200–240 V, 50/60 Hz

13

Cogging Torque and Torque Ripple Measurement

ATM-100 / ATV-100 Cogging Torque Tester
To reduce motor noise and vibration, cogging torquemust be measured and reduced. Sugawara’s Cogging
Torque and Torque Ripple Test Systems can measure
cogging torque with high accuracy and no mechanicalloss for a variety of motors (DC, DC brushless, AC
servo, stepping, etc.).
These systems can play a significant role in motor
development and quality management.

■ Main features●Measures cogging torque with no mechanical loss
●Enables measurement of both cogging torqueand torque ripple on one piece of equipment

Supports a wide range of torque values at low cost through theswitching of torque sensors

High accuracy●Measurement
angle resolution: 0.01°

Maximum number of data items collected per revolution: 36,000●Exceptionally high measurement reproduction

Short takt time
●Measurements
can be completed in as little as 3 sec (at therotation speed of 20 r/min). A vertical structure simplifies axialalignment and shortens measurement time.

Convenient analysis functions●Peak-number
and frequency analysis can be performed by FFT
in addition to display functions in XY coordinates and polar
coordinates.

●Supports simultaneous measurement of various
types of external sensors

Supports voltage, current, and temperature measurements
Measurement of resolver/hole sensor output contributes toimproved controllability (using optional I/O module).

1

2
N

S

S

N

S

N

N

When turning the shaft of a permanent-magnet type of motor (brushless
motor, etc.) in a non-energized state with one’s fingertips, you can feel arelatively constant amount of friction torque and a pulsating torque at thesame time. This friction is called motor mechanical loss that arises fromthe bearings used to support the rotor and the contact made between thebrushes and commutator. The pulsating effect, on the other hand, arises
from the attraction between the rotor magnets (1) and stator-yoke teeth (2).
This friction and pulse effect are commonly called loss torque and cogging
torque, respectively.

S

What is cogging torque?

Cogging torque results in uneven torque and rotation when driving the motor, which gives rise to noise andvibration and generates disturbances in the control process. In recent years, brushless motors, which are known
for their high-efficiency, compact, and maintenance-free features in addition to high controllability, have been
installing high-performance magnets in a small space, which makes it easy for cogging torque to occur. Accurate
measurement and understanding of cogging torque is essential to the design and adoption of high-quality motors.

■System configuration
The ATM-100 and ATV-100 Cogging Torque Tester connect directly to a personal
computer running Windows.
Users can switch between five types of torque sensors from 1 mN·m to 10 N·m
on their own.

POWER

COGGING TORQUE TESTERCW

ATM-100

CCW

TORQuick CT
TORQuick
Software CT

High-accuracy torque sensors
TSA-1MN (1 mN·m)
TSA-10MN (10 mN·m)

ATM-100 Cogging Torque Tester

TSA-100MN (100 mN·m)
TSA-100MN (100 mN·m)

CW

I/O Module(Option)

CCW

TSA-1N (1 N·m)

ANGLE POSITION
POWER

CCW

TSA-10N (10 N·m)CW

COGGING TORQUE & TORQUE RIPPLE TEST SYSTEM

ATV-100

ATV-100 Cogging Torque Tester

14

Vertical sensors use no axle bearings thereby
eliminating mechanical loss that can lead tomeasurement error.
A vertical arrangement also simplifies alignmentof the sensor shaft and motor shaft.

TORQuick CT Software
TORQuick CT is specialized software developed for the ATM-100 and ATV-100 Cogging Torque Testers.
It displays cogging torque and torque ripple of the test motor on a variety of graphs.

■ Main features●Displays measurement results on a XY-coordinatesgraph, polar-coordinates graph, and FFT graph.

FFT-graph display enables processing method, window function,etc. to be selected from a pull-down menu so that desired
measurement conditions can be quickly set.

Expanded functions through an I/O module●Connecting
the I/O module to the personal computer enables avariety of expanded functions to be used.

►Simultaneous plotting of input data on graphs

Up to 8 channels of external data can be input andsimultaneously displayed with angle-torque characteristics.
Units and scaling/offset values can be set. Various types ofdata such as voltage, current, temperature, and motor rotation
position from a position sensor can be simultaneously
displayed to support motor-control development.

►Control of external motor power supply

XY coordinates graph

Enables ON/OFF control of the motor power supply
synchronized with the starting/stopping of torque-ripple
measurements.
Automatic ON with appropriate timing when starting
measurements and automatic OFF when stopping
measurements prevents motor damage caused by failure to
cut the power supply.

Polar coordinates graph

I/O Module (Option)

FFT graph

Input voltage signal overlaid on cogging torque■Torque calibration
Calibration can be easily performed by software. No volume
adjustments, etc. are necessary. The ATM/ATV series has avertical shaft, so the Calibration Jig Set converts the verticalforce of the weight into a horizontal force when calibration.
(The Calibration Jig Set is an option.)■Operating conditions
OS
CPU
MemoryMonitorDVD drive
Com. Ports

Windows10(64bit) Professional Japanese or English version
Intel Core i5 or later processor
8 GB or more recommended
HD FWXGA 1366×768 or greater
One or more units (required for software installation)
USB port x 1 (2 ports when using the I/O module)

15

Cogging Torque and Torque Ripple Measurement

Motor Fixtures
for Accurate Measurements

An XYZ stage for the ATM-100 and a standard motor fixtures for the
ATV-100 are provided. Customized jigs and couplings are available
according to motor type, shape, and torque characteristics. Customers
can also contact us about measurement of fan and pump motors withno protruding shaft.

XYZ stage
for the ATM-100

Standard motor fixture
for the ATV-100■ Dimensions
600
120°

350
350

300
POWER

300

350

COGGING TORQUE TESTERCW

P.C.D 180

ATM-100

CCW

3-M8

Φ250

POWER

758

ATM-100

XYZ stage

Φ130

Torque Sensor

XYZ stage

CCW

Z axis: 0–30 mm
X and Y axes: ±25 mm

CW

ANGLE POSITION
POWER

CCW

CW

Z axis: 0–30 mm
X and Y axes: ±25 mm

391

52—82

CCW

540

CW

270–300

Torque Sensor
COGGING TORQUE TESTER

43.5

Torque Sensor

COGGING TORQUE TESTER

ATM-100 + Height option HC-ATM-100

ATM-100

ATV-100

ATV-100■ Specifications
Cogging Torque Tester

ATM-100

ATV-100

Torque Sensor

TSA-1MN

TSA-10MN

TSA-100MN

TSA-1N

Rated torque

1 mN·m

10 mN·m

100 mN·m

1 N·m

Sensor shaft diameterΦ3 mm

TSA-10N
10 N·m
Φ10 mmTorque accuracy±0.5% of rated torque *1

Rotation speed

0.1–20 r/min (at intervals of 0.1 r/min)Angle resolution

0.01°

Number of acquired data items
and sampling interval

Connection with personal computer

Rotation speed [r/min]
0.1– 1.5
1.6– 3.0
3.1– 8.0
8.1–15.0
15.1–20.0

Data items
36,00018,000
7,200
3,600
1,800

Sampling interval
0.01°
0.02°
0.05°
0.10°
0.20°

USB (RS422 can be selected as an option at ordering time.)

Power requirement

100–240 VAC, 50/60 Hz

Operating temperature

0–40°COperating humidity

20–90%RH, No condensation

Dimensions (W×D×H)
Weight*1 After calibration with ATM-100/ATV-100

300 × 350 × 540 m
300 × 350 × 758 m *2

600 × 350 × 391 m

70 kg
80 kg *255 kg

*2 When HC-ATM-100 height option is selected.

Data measurement services using Sugawara's motor testers are available.
Please visit our website for more information.

The above specifications are subject to change without prior notice for
product improvement.

Products: Xenon Flash, Torque Dynamometers, Bearing Inspection Systems, etc.

Head office
Tokyo sales office

8-2 Minami-Kurokawa, Asao-ku, Kawasaki-shi, Kanagawa, 215-0034, Japan
Tel: +81-44-989-7320 Fax: +81-44-989-7338

Osaka sales office6-17 Yokomakura-Nishi, Higashiosaka-shi, Osaka, 578-0956, Japan
Tel: +81-72-966-1061 Fax: +81-72-966-0961

Nagoya sales office 1-2-29 Kamimaezu, Naka-ku, Nagoya-shi, Aichi, 460-0013, Japan
Tel: +81-52-331-6562 Fax: +81-52-331-6604
URL: https://www.sugawara-labs.co.jp/

E-mail: info@sugawara-labs.co.jp
YC2307-01