1. Eco friendly vibration test systems
reduce the impact on the environment.
Energy Saving Vibration Test Systems

2. Contents
1.
Necessity
2.
Aim
3.
Brief Summary of ED Vibration Test System


4.
System construction
Vibration generator mechanism
Energy Saving Modification of ED Vibration Test System


Manual approach to save energy tried in the past

5.
Conventional operation method
How to achieve an optimal energy saving
ECO-Shaker Technologies


System construction

6.
Energy saving vibration test system: ECO-Shaker
System operation flow
ECO-Shaker Performances


Blower acoustic noise reduction

7.
Energy saving
Reduction of electricity charge and CO2 emission
Conclusion
Energy Saving Vibration Test Systems
1

3. 1. Necessity
● What is Vibration Test?
Vibration testing examines the influences of mechanical vibration to functionality,
durability, and reliability on a component used within a certain environment.
Today, it is considered as one of the essential test methods in development and
manufacturing processes and has become a technology to sustain the reliability of
the modern social systems.
Objects of the vibration tests are exemplified as below:
Category
Parts
Assembly parts
Final product / unit
Packed product
Vehicle
Structure
Examples
Electronic parts, Mechanical parts
Printed-circuit board, Mechanical assembly
Laptop computer, Engine, Satellite, Airplane wings
Packed cargo for transportation
Automobile (Ride-comfort, Durability etc.)
House, Building, Bridge (Earthquake protection)
Energy Saving Vibration Test Systems
2

4. 2. Aim
Almost all of the vibration test equipment are driven by electricity.
Electrodynamic (ED) vibration test system, which is IMV’s major product, is basing
on the operation principle that converts electricity directly to mechanical vibration
and consumes electricity considerably.
Consequently, when energy saving modification of this system is successfully done,
following benefits are expectable:
Reduction of Testing Cost
Reduction of Environmental Impact
Energy Saving Vibration Test Systems
3

5. 3. Brief Summary of ED Vibration Test System
System construction
Energy Saving Vibration Test Systems
4

6. 3. Brief Summary of ED Vibration Test System
Vibration generator mechanism
Energy Saving Vibration Test Systems
5

7. 4. Energy Saving Modification of ED Vibration Test System
Conventional operation method
Energy Saving Vibration Test Systems
6

8. 4. Energy Saving Modification of ED Vibration Test System
Power loss in the conventional operation method
Blower power Pb : Fixed at the rating power
Drive power Pd : Varies from second to
second according to the required excitation
force
Field power Pf : Fixed at the rating power
Energy Saving Vibration Test Systems
7

9. 4. Energy Saving Modification of ED Vibration Test System
Manual approach to save energy tried in the past
Method
When it is known that the required force is
small, reduce the field current and the
blower speed prior to the test start.
(Setting needs to be switched-over by the
operator.)
Power loss by the conventional
operation
This amount is possible to
be saved.
Energy Saving Vibration Test Systems
8

10. 4. Energy Saving Modification of ED Vibration Test System
Manual approach to save energy tried in the past
Problems
Problem 1: Test might be aborted suddenly.
If an excitation force larger than the estimate prior to the test start is required, the system
will stop for safety and the test will be aborted.
Problem 2: Insufficient saving is only possible.
To avoid the risk of sudden abort of the test, to take enough margin for operating
condition is necessary. Then, only small energy saving efficiency would be expectable.
Energy Saving Vibration Test Systems
9

11. 4. Energy Saving Modification of ED Vibration Test System
How to achieve an optimal energy saving
1) Optimal setting of the field current
Power losses in the two coils are
calculated and the total power
loss is examined.
As seen in the figure, there
exists an optimal setting of
the field current at which the
total power loss (Pf+Pd)
become minimum.
Energy Saving Vibration Test Systems
10

12. 4. Energy Saving Modification of ED Vibration Test System
2) Optimal setting of the blower speed
The blower speed should be possible to be adjusted to cool down both the
armature coil and the field coil appropriately:
→ Too fast, too small saving !
→ Too slow, the coils might be burnt!
Problems that need to be overcome
 Temperature characteristics of the drive
coil and that of the field coil are different.
 Temperature characteristics are
different over the vibration generator
models.
Not only difficult to handle,
but also necessary to be treated
one by one for each generator
model.
Energy Saving Vibration Test Systems
11

13. 4. Energy Saving Modification of ED Vibration Test System
3) Readiness to any test conditions
Excitation level can be varied according to the elapsed time and/or to the
frequency through a test.
The energy-saving control should be ready to such change of the
required excitation force caused by the test conditions
Example
How to control the field current
in a test in which the excitation
force requirement varies,
especially at the circled parts
○ in the figure?
Energy Saving Vibration Test Systems
12

14. 5. ECO-Shaker Technologies
Energy saving vibration test system: ECO-Shaker
5. エコシェーカーの概要と仕組み
ECO-Shaker has solved such problems mentioned above, and has realized a
full automatic energy saving operation all the while through the given test
execution.
Features of the ECO-Shaker
Observing the drive current and the cooling air temperature, ECO-Shaker
determines the optimal field current & blower speed setting and operates
the full automatic energy saved vibration testing.
Communicating with the vibration controller K2, various types of
vibration tests are possible to be operated in energy saving manner.
Energy Saving Vibration Test Systems
13

15. 5. ECO-Shaker Technologies
System construction
Energy Saving Vibration Test Systems
14

16. 5. ECO-Shaker Technologies
System operation flow
System Start
: System boot up operation
: Start by the Operator
: Automatic control by the system
Rating field current is set (If0),
Blower speed is optimally controlled
Excitation Start
: Test is started by the operation of
the Vibration Controller
Drive current (Id0) and cooling air
temperature (Tin) are measured.
Presently required force F1 is calculated
: By the formula F=BLId=βId
β is measured for each vibrator
model
Optimal operating condition to output the
required F1 is searched and determined.
Optimal operating condition is set.
: Optimal field current and optimal blower speed are set
and realized by the variable power supplies for each.
Energy Saving Vibration Test Systems
15

17. 6. ECO-Shaker Performances
Energy saving
Actual performance of the energy saving by the data taken with
a standard system EM2601 (Rating force ：54 kN）
Energy Saving Vibration Test Systems
16

18. 6. ECO-Shaker Performances
Blower acoustic noise reduction
Blower speed is slowed for energy saving
Then, the acoustic noise by the blower is also reduced at the
same time. Work environment when the excitation force is small
can be drastically improved.
Energy Saving Vibration Test Systems
17

19. 6. ECO-Shaker Performances
Reduction of electricity charge and CO2 emission
Note:
The figures are showing a simulation result
under the assumption of below:
・Excitation Force: 25% of the rating
・Operating Ratio: 50%
・Electricity Charge: Yen16 / kWh
・CO2 Emission Rate: 0.000555 ton / kWh
Energy Saving Vibration Test Systems
18

20. 7. Conclusion
ECO-Shaker is introduced
Electricity cost is reduced
by energy saving
Blower speed is slowed by
the energy saving operation
Blower noise is reduced
Energy saving effect is
always visible and recorded.
Work environment is improved
Very good reputations by the customers who are already
using the ECO-Shaker
Patents granted for the ECO-Shaker technologies:
Japan
Patent No.4231095, No.4263229
No.4812857, No.4812858
U.S.A.
US 8,069,728 B2
Europe
China
EP08075809.7 (pending)
200810174953.4 (pending)
Energy Saving Vibration Test Systems
19