Electrodynamic Vibration Test Equipment | Electromagnetic Shaker China Manufacturer
Electrodynamic Vibration Test System is used to simulate vibration states under various conditions by means of electromagnetic excitation to determine the vibration resistance, stability, and reliability of various components and finished products in service life.
Our electrodynamic shakers can accept a wide range of payloads to reproduce Sinusoidal, Random, Resonant search and dwell, Classical shock, Road simulation, and other vibration modes in single-axis or X, Y, Z multi-axis directions. The electrodynamic vibration test systems conform to ISO, IEC, ASTM, DIN, UL, MIL, and other international standards, widely used in aerospace, precision instruments, energy, communications, electronics, and other industries.
We take the vibration test of lithium-ion batteries in the UN 38.3 chapter of the dangerous goods transport safety manual formulated by the United Nations as an example. A set of the electrodynamic vibration test system with a small vibration shaker is a must-have device to complete this test. The standard requires the vibration on the cells or batteries to be a sinusoidal waveform with a logarithmic sweep of 7 Hz and 200 Hz and back to 7 Hz traversed in 15 minutes. You need to mark 3 mutually perpendicular mounting positions on the sample first (note that one of the vibration directions must be vertical to the terminal face) and then mount one of them on the electrodynamic shaker table with the help of the auxiliary devices. Start the machine after setting the logarithmic frequency sweep parameters on the computer. The machine will repeat the logarithmic frequency sweep 12 times in 3 hours and then end automatically. You are required to test the remaining two vertical positions of the sample in the same way. It will take a total of at least 9 hours to test one sample.
According to the weight of different sample cells or batteries (with 12 kg as the dividing line), the parameter settings for one-way logarithmic frequency sweep in the standard are different. In the first segment, both stipulate that the sample should be tested at an initial frequency of 7 Hz and a peak acceleration of 1 g until it reaches 18 Hz. You need to allow the machine to increase the peak acceleration from the second segment. For samples with a mass less than or equal to 12 kg, the peak acceleration is required to reach 8 g when the vibration frequency is about 50 Hz (The amplitude is maintained at 0.8 mm), and keep the acceleration until 200 Hz arrives. For samples with mass greater than 12 KG, the peak acceleration is required to reach 2 g when the vibration frequency is about 25 Hz (The amplitude is maintained at 0.8 mm), and maintain the acceleration until 200 Hz reaches.
UN38.3 vibration test spectrum
If you are interested in other lithium-ion battery safety testing equipment, please click HERE to learn more from AMADE TECH.
Electrodynamic Shaker Working Principle
The working principle of an electrodynamic vibration shaker is similar to that of a loudspeaker. That is, A current-carrying conductor moves under the action of electromagnetic force in a constant magnetic field. The armature of the electromagnetic shaker is located in a space with a high magnetic induction intensity.
When the required vibration signal is generated from the signal generator or vibration controller of the vibration test system and transmitted to the drive coil of the armature after being amplified by the power amplifier, the excitation force of the armature is generated when the corresponding alternating current passes through the drive coil. The vibration shaker table will generate the required vibration waveform.
Model | AT-EV1005 | AT-EV101 | AT-EV202 | AT-EV203 | AT-EV204 | AT-EV206 | AT-EV210 | AT-EV320 | AT-EV350 | AT-EV470 | >>more |
Frequency range (Hz) | 5~6000 | 5~6000 | 5~4000 | 5~4000 | 5~4000 | 5~4000 | 5~3000 | 5~2500 | 5~2700 | 5~2500 | >>more |
Rated Sine force (kfg/kN) | 55/0.539 | 100/9.8 | 200/1.96 | 300/2.94 | 400/3.92 | 600/5.88 | 1100/10.78 | 2000/19.6 | 5000/49 | 7000/68.6 | >>more |
Rated shock force (kfg/kN) | 100/9.8 | 200/1.96 | 400/3.92 | 600/5.88 | 800/7.84 | 1200/11.76 | 2200/21.56 | 4000/39.2 | 10000/98 | 14000/137.2 | >>more |
Max. acceleration Sine/Ranom (g) | 30/30 | 65/60 | 80/60 | 100/60 | 100/60 | 100/60 | 100/60 | 85/60 | 90/60 | 100/60 | >>more |
Max. displacment peak-peak (mm) | 20 | 20 | 38 | 38 | 38 | 51 | 51 | 76 | 76 | 100 | >>more |
Max. velocity (m/s) | 1.6 | 1.8 | 2.0 | 2 | 2 | 2 | 2 | 2 | 2 | 1.8 | >>more |
Payload (kg) | 20 | 100 | 100 | 120 | 120 | 300 | 300 | 300 | 500 (Up to 2000) | 500 (Up to 2000) | >>more |
Armature mass (kg) | 1.7 | 1.5 | 2.5 | 3 | 4 | 6 | 11 | 24 | 55 | 70 | >>more |
Considering the Electrodynamic Vibration System has a fairly wide range of uses accepting specimens of different sizes and shapes, AMADE TECH is able to provide different models and configurations of vibration shakers with low, medium, and high excitation forces to meet a wide variety of usage scenarios allowing the vertical vibration and horizontal vibration.
Different models vary in excitation force, frequency range, displacement, velocity, armature weight, dimension, machine layout, etc. One vibration shaker is available to turn flexibly for supporting vibration table testing in both directions.
If required, the electrodynamic shaker is allowed to be integrated into the temperature and humidity test chamber to provide specimens with artificial environments under the vibration test so as to access the environmental adaptation of vibrating specimens accurately.
If you have any questions, please feel free to reach us for solutions. Our sales engineers will propose the most suitable configuration and model according to your test requirements.
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Horizontal+vertical electrodynamic shaker system
Electrodynamic vibration system with an environmental chamber
Learn More About the Electrodynamic Shaker and Vibration Test System
Frequency Range: Expressed in units of Hz. The lower limit is 1 Hz. The maximum value is the frequency value of the electrodynamic shaker under the premise of rated exciting force, maximum displacement, and maximum acceleration.
Rated Exciting Force: The thrust that the electromagnetic shaker can generate when it is running. Expressed in units of KGF or KN.
Maximum Displacement: The maximum double-amplitude stroke that the armature inside the vibration shaker can generate. This value is limited by the mechanical operation of the shaker. Units are expressed in mm p-p.
Maximum Acceleration: The maximum acceleration value that the electrodynamic shaker can generate under no-load conditions. Expressed in units of g or m/s2
Payload: The maximum load weight that can be accepted on the electrodynamic shaker table. The unit is expressed in kilograms.
Maximum Velocity: The maximum running speed produced by the electrodynamic shaker. The unit is expressed in m/s.
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A complete electrodynamic vibration test system constitutes a high-frequency shaker, vibration slip table(if required), power amplifier, vibration controller, sensor, PC, cooling device, environmental test chamber(if required), etc.
High performance and reliability
- The vibration controller adopts the advanced distributed structure system. The DSP processor performs the closed-loop control, and the PC is independent of the control ring, which ensures the real-time and high efficiency of the control system and can timely and quickly respond to any changes in the test system, ensuring stability and high precision of the control system.
- The hardware uses the 32-bit floating point DSP processor with the main frequency up to 300 MHz and the 24-bit resolution ADC/DAC, combined with the high-precision floating point digital filtering and the low noise design technology of the hardware circuit. The dynamic range of the controller’s random control is greater than 90 dB, and the signal-to-noise ratio is greater than 100 dB to ensure the high precision of the analysis effectively.
Easy to Operate
- Windows-based testing software brings convenient operation and rich auxiliary functions.
- The system has a powerful automatic guide and automatic test report generation function.
- Rich and intuitive test parameter settings are available.
- The USB 2.0 interface makes it more closely and harmoniously connected with the computer.
Powerful Functionality & Flexibility
- It is a powerful vibration control platform that can accomplish multiple complex tests.
- On the same hardware platform, different application software can be configured to complete various analysis tasks to meet your additional testing and analysis needs.
- The controller adopts a modular design, which can configure corresponding hardware and software according to different user needs to meet different test requirements.
Test Safety
- The controller provides small-scale signal control to get a preview of system vibration control.
- This method helps the test engineer to predetermine the noise level and get a rough idea of the system’s transfer function and other characteristics.
- A number of safety checks and interlock settings ensure the safety of testers, samples, and shaker system to the greatest extent.
- If the system is abnormal, you can immediately press the built-in emergency key to end the test.
Test Report Generation
- The system supports the function of quickly generating test reports in word format or PDF format with one click, and you can quickly get the current test results.
- The test report contains information such as the basic test control function description, the specific test setup parameters, the control target spectrum curve, the test time domain, frequency domain curves, etc.
- It allows you to modify and make according to different test report specifications, supports direct printing and print preview, and can perform online sending.
Under the current wave of globalization, whether you are entering the regional or international market, it is the consensus of people to improve product quality.
Electrodynamic Vibration Table testing is an indispensable tool to help your product jump into the ranks of high quality. The shaker vibration test aims to simulate a series of vibration phenomena of the sample in actual operating conditions and to grasp in advance whether the sample can withstand these vibrations in the life cycle.
In the research and development stage of the product, shaker vibration testing shall be conducted to analyze the vibration modal of the product under different vibration states, test the ultimate strength of the product and formulate relevant specifications. Then, according to the destructiveness of vibration, the failure analysis and improvement of the product are carried out to avoid other problems after the mass production of the product in the later stage. At the same time, it helps to confirm whether the product design and function meet the standard requirements. For example, when a carrier rocket is ignited and launched, the engine will produce low-frequency vibration along with the intense combustion of the internal fuel. And with the rapid increase of the rising speed, the aerodynamic boost will cause the rocket to vibrate violently. An electrodynamic shaker to simulate these vibrational environments is indispensable during the development phase. All components in the rocket must pass these vibration tests 100% to ensure the safety of the launch.
After any product is produced, there will inevitably be subjected to collisions, bumps, or direct vibrations during storage, transportation, and use, which may lead to functional failures. For example, when a car engine is running, various high-frequency and low-frequency vibrations will be generated, including torque fluctuations, vibrations caused by uneven road surfaces, vibrations generated during shifting, and vibrations caused by combustion pressure pulses. Suppose you are a supplier of engine attachments. In that case, it is an effective means to test product quality and ensure durability and stability by placing the produced product samples in these vibration environments. Another example is lithium batteries. Because their raw materials are chemically active, to ensure that there will be no short circuit, fire, or explosion during transportation and use, almost all lithium battery safety standards such as UN38.3, IEC 62133, and UL 1642 require them to pass the vibration test.
Electrodynamic vibration testing is also an effective means for the quality inspection department to conduct random inspections on specific products to screen out product defects. The problems that can be found include loose fixings, poor contact, defective parts, defective solder joints, cracking and damage of components, abnormal short circuit, noise resulting from vibration, abnormal function failure, and so on.
In summary, an electrodynamic vibration shaker system can bring you the following benefits:
- Provide the basis and reference for project development.
- Facilitates Input Process Quality Control.
- Improve and enhance product quality.
- Provide correlation conditions related to vibration.
- Offer the basis for product quality assurance and commitment.
- Reduce maintenance costs and increase profitability.
- Improve the overall image of the company.
Facing so many models, you may be confused about which electrodynamic vibration shaker system is suitable for your testing. Don’t worry. The following content will help you.
First, you need to determine the vibration type of the electromagnetic vibration test you want to perform, such as Sine sweep, Random, Shock, Resonant search and dwell, etc., so that our sales engineers can give the corresponding configuration according to your requirements. One set of our vibration test system is allowed to implement different test types.
Second, you need to tell us the maximum payload required for your experiment. The maximum load is related to the excitation force required by the vibration shaker, which directly affects what load level of the shaker we will recommend to you. The price of different levels of shaker varies by thousands of miles. To avoid wasting performance and save costs for you, we will recommend the most suitable one according to your sample and test requirements. The exciting force unit is KGF or kN, and the formula for calculating the exciting force will be described in detail in the next section.
The frequency, displacement, acceleration, vibration speed, and other data required by your test also need to be informed to us so that we can quickly determine whether these data are covered by the corresponding rated parameters of our equipment.
You also need to advise us of your sample’s dimensions, required vibration direction, and installation method. We will configure a corresponding extension table (Regular vertical extension table or slip table) to accommodate your sample, and corresponding holes will be reserved on the metal table to facilitate the installation of the sample. We will equip the machine with corresponding fixtures to fasten the specimen. If your sample is of unconventional shape, we can customize its corresponding auxiliary devices.
Let’s take the Vibration test in the UN38.3 standard as an example. If the test object is small cells or batteries, we will recommend you the following core configuration for the electromagnetic shaker:
| Maximum excitation force | 300 kgf / 2.94 kN |
| Frequency | 1 ~ 2500 Hz |
| Max. Displacement | 38 mm P-P |
| Max. Acceleration | 100 g |
| Max. Velocity | 2 m / s |
| Payload | 120 kg |
| Vibration table type | Vertical |
| Table size | 400 mm x 400 mm |
Please rest assured that it is not complicated.
We will provide detailed setup instructions. But not only that, because if we only provide text to guide you on how to set up and install the equipment, it may not be so intuitive. And some installation details may confuse and overwhelm you when operating. After considering this, we think a video is the best setup guide.
We will set up and run the machine in our factory before shipping for each electrodynamic vibration test system. The entire process will be shot and sent to you. The video content will be very detailed, as detailed as how to connect each wire, where to connect it, where to set each parameter, and so on. In this way, after you receive the device, you just need to follow the steps of the video to operate and complete the setup step by step so that it will not be error-prone and you can quickly complete the setup. For those devices that are too bulky and need to be disassembled for shipment, we’ll be providing on-site installation and instruction, such as the composite electrodynamic vibration test system with a temperature and humidity environmental chamber.
Our after-sales staff is always by your side. If you have any questions during your setup and use, please feel free to contact us. Our engineers will help you solve the problem immediately.
Thanks to the professional vibration test software installed in the computer that goes with the vibration test system, it helps us simplify the procedure and makes the operation and control of the experiment very easy and convenient.
After mounting the specimen, the software allows you to set the test channel and input desired parameters in segments, such as frequencies, displacements, peak accelerations, velocities, etc. Finally, schedule your test based on the standard you follow. Well, up to this point, all the settings on the software have been completed. You can save all of these settings to your computer if you want. When conducting the same test project next time, you can directly call these data to start the test, which is very convenient.
Next, you just need to start the device, and the machine will take care of the rest. The system will automatically execute all the commands you preset. All real-time data and curves will be displayed on the computer screen throughout the test. The shaker will automatically stop when the test tasks are completed one by one. The detailed test report will pop up on the screen in PDF or WORD format for your review.
What do you think? Isn’t it simple?
Before the vibration test is carried out, it is time to determine whether the electromagnetic shaker you choose can meet your test requirements. Among a series of parameters of the vibration test equipment, the most important thing is to calculate whether the excitation force required for the test is within the rated excitation force range of the shaker. Newcomers who have just come into contact with the vibration test equipment may find it challenging to start. This article briefly introduces how to calculate the excitation force for vertical vibration from the perspective of practical application.Your Content Goes Here
Sine Force (p – p)
The calculation formula is as follows:
F=(M0 + M1 + M2) x A x 1.3
Where
F is the required sine force, in KGF
M0 is the mass of the armature of the shaker, in kg
M1 is the extension table and fixture mass, in kg
M2 is the specimen mass, in kg
A is the acceleration, in g (1g = 9.8 m/s2)
1.3 is a constant safety factor
Random force (Rms) = F/(Sine force divided by )
Shock force = F x 2 (Sine force times 2 )
Suppose conducting a vibration test on a sample with a mass of 0.5 kg. The vertical extension table mass is 15 kg. The fixture mass is 0.5 kg. The armature mass is 3 kg. The required peak acceleration is 8 g.
- The required Sine force is: (3 + 15 + 0.5 + 0.5 ) x 8 x 1.3 = 197.6 KGF
- The required Random force is: 197.6 / 1.414 = 139.7 KGF
- The required Shock force is: 197.6 x 2 = 395.2 KGF
To ensure that the armature is always within a reasonable displacement range when it continuously performs high-frequency motion in the up and down or back and force directions, we need to make the position of the armature always in the middle of the test stroke before the vibration test.
Our electrodynamic shakers employ a photoelectric automatic centering system that relies on non-contact sensors to detect whether the armature is centered. It keeps the armature centered by adjusting the air volume of the air spring. When you disassemble or assemble the sample, the center holding device will automatically deflate or inflate so that the armature is always in the center of the travel. When the center indicator on the table lights up green, it means that the armature has been centered. If the indicator light is red, it is in an abnormal state, and you need to check the cause further. This device keeps the armature in the center position even when the shaker is in motion.
In the actual vibration test, the size of the sample or fixture is often larger than the area of the armature platform of the electrodynamic shaker. At this time, we need to expand the original table area to meet the mounting requirements of the sample. The standard method is to mount an auxiliary extension vibration table.
An extended vibration shaker table is generally required for vibration table testing in a vertical direction. The table is available in polygonal and circular shapes.
If vibration in a horizontal direction is required, we can configure a vibration slip table for the electromagnetic shaker to conduct the slip table vibration testing. The slip table comprises a slip plate, a connector, a natural granite plate, a horizontal slip table base, an independent oil source, etc.
The need for additional supports and guides on the extended table depends on the weight of your product and the eccentric loading during the test. AMADE TECH can provide you with different specifications of load-bearing airbags and different forms of guide devices. If you equip a proper auxiliary support and guide device, the bearing capacity and anti-eccentric load capacity of the shaker can be significantly improved.
For large specimens and products with heavy loads and complicated disassembly and assembly, the vibration table lifting device can be used to raise the vertical extension table to a certain height so that the electrodynamic shaker body can be turned into a horizontal direction to connect with the slip table for horizontal vibration testing, which eliminates the need to remove the vertical extension table.
We have specially configured a servo protection system for the electrodynamic vibration test system. It can provide protection against temperature, wind pressure, over-displacement, over-voltage, over-current, input under-voltage, external fault, control power supply, logic fault, and input phase loss. These protection mechanisms escort your shaker table vibration testing and allow you to use this device without worries.
Of course. We can design and manufacture all kinds of fixtures and auxiliary devices for you. The fixtures will be compatible with your vibration test tables and your samples. We are capable of analyzing the fixture, predicting the frequency response after manufacture, and using the various process to reduce the Q value, finally helping you complete the given test.
On the one hand, we configure a split air blower directly connected to the shaker body through a thick retractable air pipe. The power of the blower varies according to the specification of the shaker, and a muffler box is equipped to reduce noise. When the electrodynamic vibration test system runs, the blower will bring a strong airflow to the inside of the shaker body for cooling.
On the other hand, we have specially designed the interior of the shaker body and adopted a new type of air duct structure. For example, the excitation coil adopts a honeycomb air duct, and the middle magnetic ring adopts a double-layer split air duct. These measures have greatly improved the cooling effect of the shaker.
Yes. In order to meet the composite test requirements for vibration testing of samples under specified temperature and humidity requirements, we can integrate the vibration test system and the environmental chamber with temperature and humidity control functions into a set of equipment to achieve vibration testing on the sample under high temperature, low temperature, constant temperature or constant humidity conditions.
We can provide the composite testing equipment available only in vertical vibration or the one integrating horizontal and vertical vibration functions.
During the test, the combined equipment allows the specimen to be exposed to a simulated environment that integrates temperature, humidity, and vibration. The allowable test temperature range is as low as -70°C and as high as 150°C. The settable relative humidity range is 20% ~ 80%. Selectable vibration types include Sine vibration, Random vibration, Classic shock, RSTD, Sine plus random, etc. You are allowed to select a single condition or multiple conditions in conversion for one testing.
Compared with a single test condition, the composite-condition test can fully consider various working conditions and more realistically simulate the product’s transportation and actual use environment. The electrodynamic vibration test system with an environmental test chamber is a piece of critical testing equipment for judging the adaptability of products in vibration state to various environments, exposing product defects, and identifying product reliability.
The required voltage for all devices is 3-phase 380 V, 50 Hz. The total power of the equipment is different according to different models. The low is only 9 kW, and the high is more than 100 kW. The air pressure requires a minimum of 0.5 MPa, which is subjected to the actual equipment.
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Please feel free to contact us for more details on the product, price, lead time, payment terms, shipment methods, etc. AMADE TECH sales specialists will respond within one working day.
