Electromagnetic vibration testing system LEES

Electromagnetic vibration testing system LEES simulates the vibration environment under the laboratory condition,and test the impact strength as well as reliability of various vibration test applications.

In the laboratory ,with the aid of vibration testing system,model simulation of reproduction of sinusoidal.random,resonant search and dwell, classical shock and simulation,etc.can be achieved.It is essential for product quality assurance,new product research and development.

Product Details

ES series electromagnetic vibration testing system is specially designed to meet the need for long time operation. installation of vibration resistant base can achieve vertical and horizontal vibration. The standard platform is installed with high efficiency airbag shock isolation device so that the vibration transmitted to the building can be minimized, at the same time avoid the need of additional foundation in most of the cases.

A complete set of vibration testing system is composed of shaker. power amplifier and vibration measuring control system.in

accordance with the relevant national and international standards(such as:. MIL-STD. DIN.ISO.ASTM,IEC.ISTA,GB.GJB,JIS.BS.etc.) to provide technical support for establishing product quality inspection.

Features

Rugged suspension system and linear motion guiding.strong carrying capacity.good guiding functions, high stability
Load center airbag has high static stiffness and low dynamic stiffness.strong carrying capacity, perfect performance on amplitude variation
High efficiency D class power switching, 3-sigma peak current provide finest power consumption and minimize harmonic distortion
Quick self-diagnosis with safety interlock, high safety reliability Airbag shock isolation device for vibration platform without the need of additional foundation, perfect reproduction of vibrational wave and reduce vibration transmittance
Provide horizontal and vertical expansion platform for different application.

Simple controller operation

Vibration test machine is used to test the objects/products property in a vibration Transportation environment,such as boat, car, truck and train. It is widely applied to electronic, electrical and mechanical, photoelectric, auto-mobile, toys, packaging, etc.

Main features:

LCD computer control, easy operation.
Even vibration, easy to adjust amplitude, predicate amplitude.
Large amplitude adjustment range, low noise.
Human engineering design.
Fixed frequency, sweep frequency and multistage random test function.

Testing methods:

Random Vibration Testing replicates complex frequencies in a chosen bandwidth. Vibration environments may have input from multiple sources, such as wheels over a road. In these vibration exposures, it may be more accurate to analyze and test using random vibration.In random vibration the primary concern is the spectral content of the vibration being generated.

Most random vibration tests are conducted using Gaussian random suppositions where maximum amplitude is not definable,and levels are measured in RMS values. Sinusoidal Vibration Testing with sinusoidal vibration,the relationship betweenacceleration, velocity and displacement is fixed and frequency dependent. Variation in any one of these three parameters affects another, and for this reason, all of them should be considered simultaneously when specifying or observing sine vibration.Sine Sweep Vibration Testing: are sweeps across a frequency spectrum at a specific rate to identify resonant frequencies of a Unit Under Test (UUT).Sine Dwell Vibration Testing are dwells at a specific frequency, often at a resonant frequency, to duplicate a worst case condition for the UUT. Sine-on-Random Vibration Testing is performed by overlaying a sine dwell on a random vibration profile.

The Working Principle of Vibration Exciter

The Working Principle of the electromagnetic vibration exciter is similar to a loudspeaker whereby electrical conductor is moved by the action of electromagnetic force in the magnetic field.The force to accelerate the moving part is generated by the balance between driving current and magnetic flux. Therefore,by controlling the driving current,one can control of the vibration generator.

Electromagnetic vibration testing system

The maximum acceleration level of the electromagnetic vibration exciter is determined by the maximum current and the load,At low frequency,displacement of moving part will limitation and the acceleration will not reach high level,The resonance frequency of the moving element is set higher than the upper limit of the frequency range.

The performance of vibration generator can be reflected by the chart that display the maximum acceleration under different frequency.By using a log-log plot,the displacement can be restricted to a linear representation with slope of 6 dB/octave.

Test requirements and model selection guide

To choose a suitable vibration test system,the most important thing is to know the exciting force required to perform the vibration test.To evaluate and calculate the exciting force,the following test specifications should be known:

Clear Testing Requirements
Maximum Displacement
Frequency（Frequency Range）
Maximum Velocity
Maximum Acceleration
Specimen Mass and Fixation

The specimen fixation is selected based on the upper limit of test frequency and specimen size,either vertical expansion platform or horizontal slip table,Specimen mass is needed to evaluate the required exciting force for vibration test

Evaluation of Armature Mass

When evaluating the exciting force needed for vibrating test,you can choose a temporary armature mass（according to the model of EV series).

Calculate the required excitation force

Vibration test machine selection guide

Air cooling Vibration Test Systems

Air Cooling Electromagnetic Test System takes the advantages of wide frequency range,reliability,small in size,easy to move,easy operation.,etc.We are providing a lots of models for your options.Sine force range is from 1KN to 70KN,the loading capacity is from 70KGs to 1000KGs.We are also providing the integrated climatic simulations and mechanical test equipment.

Features

Sine force range：1kN~70kN
High quality Spring,Excellent performance for Low Frequency.
Ratio of Random and Since force:1：1
Excellent Magnetic Uniformity.
Expand 2 times Sinusoidal Excitation Force.(Option 3 Times）
Sine,Random,Shock.,etc test.
Max Displacement(P~P（mm）):25mm,40mm,51mm,76mm or 100mm
Excellent performance of Blower,low noise and long life.
Optimization design of Armature：Light，Excellent Resistance Vibration

Technical parameters:

Model	LEES-1-150	LEES-1S-150	LEES-2-150	LEES-2-230	LEES-3-150	LEES-3-230	LEES-6-230	LEES-10-240	LEES-10d-240
	Φ60Φ120Φ15013×MB				Φ100Φ200Φ23017×MB	Φ60Φ120Φ15013×MB	Φ100Φ200Φ23017×MB	Φ100Φ200Φ23017×MB	Φ100Φ200Φ24017×MB10
Rated random excitation force/Sinusoidal excitation force(KN)	1	1.5	2	2	3	3	6	10	10
Shock Force（KN）	2	3	4	4	6	6	12	20	20
Frequency Range（Nz）	5-4500	5-4500	5-4500	5-2500	5-4000	5-2500	5-3500	5-3000	5-5000
Max Acceleration（m/s²）	500	750	1000	250	1000	350	1000	1000	1000
Max Speed（m/s）	2	2	2	1.5	2	1.5	1.8	1.8	1.8
Max Displacement P~P（mm）	25	25	25	40	25	40	51	51	51
Max Loading（kg）	70	70	70	140	120	140	300	300	300
Shaker Model	ET-1	ET-1.5	ET-2	ET-2	ET-3	ET-3	ET-6	ET-10	ET-10d
Equivalent Mass of Moving parts(kg)	2	2	2	8	3	8.5	6	10	10
Size of head expander(Working table)（mm)	150	150	150	230	150	230	230	240	240
Weight（kg）	395	395	395	430	480	430	590	900	900
Size L×W×H（mm）	3	3	3	3	3	3	3	2.5	2.5
Power Amplifier Model	SDA-1	SDA-1S	SDA-2	SDA-2	SDA-3	SDA-3	SDA-6	SDA-10	SDA-10
Power Amplifier（KVA）	1	1.5	2	2	3	3	6	10	10
Power Supply（KVA）	4	4.5	5.5	5.5	6.5	6.5	16	21	21
Weight（kg）	160	160	200	200	200	200	240	400	400
Size L×W×H（mm）	607×820×1593
Cooling Method	Forced air cooling
Blower Model	B-200	B-200	B-200	B-200	B-200	B-200	B-1000	B-1000	B-1000
Power（KW）	0.75	0.75	0.75	0.75	0.75	0.75	4	4	4
Rate of flow（m³/s）	0.1	0.1	0.1	0.1	0.1	0.1	0.33	0.33	0.33
Pressure（kpa）	1	1	1	1	1	1	3.5	3.5	3.5
Weight（kg）	30	30	30	30	30	30	115	115	115

Model	LEES-20-320	LEES-20-445	LEES-30-370	LEES-30-550	LEES-40-370	LEES-40-445	LEES-50-445	LEES-60-445	LEES-20LS3-3
	Φ120Φ250Φ32017×M10	Φ200Φ400Φ44517×M10	Φ150Φ300Φ37017×M10	Φ200Φ300Φ400Φ500Φ55033×M10	Φ150Φ300Φ37017×M10	Φ200Φ250Φ32017×M10			Φ100Φ200Φ300Φ34021×M10
Rated random excitation force/Sinusoidal excitation force(KN)	20	20	30	30	40	40	50	60	60
Shock Force（KN）	40/60*	40/60*	60/90*	60/90*	80/120*	80/120*	100/150*	120/180*	40/60*
Frequency Range（Nz）	5-3000	5-2800	5-2800	5-2000	5-2800	5-2700	5-2700	5-27700	5-3000
Max Acceleration（m/s²）	1000	700	1000	500	1300	800	1000	1000	800
Max Speed（m/s）	2	2	2	2	2	2	2	2	2
Max Displacement P~P（mm）	51	51	51	51	51	51	51	51	76
Max Loading（kg）	300	300	500	500	500	800	800	800	800
Shaker Model	ET-20	ET-20	ET-30	ET-30	ET-40	ET-40	ET-50	ET-60	ET-20LS3
Equivalent Mass of Moving parts(kg)	20	28	30	55	35	50	50	60	25
Size of head expander(Working table)（mm)	320	445	370	445	445	445	445	445	340
Weight（kg）	1695	1700	2490	2540	2490	4500	4500	4500	1695
Size L×W×H（mm）	1222×760×1052		1328×854×1140	1328×854×1158	1328×854×1140	1730×1139×1272			1222×760×1067
Power Amplifier Model	SDA-20	SDA-20	SDA-30	SDA-30	SDA-40	SDA-40	SDA-50	SDA-60	SDA-20
Power Amplifier（KVA）	20	20	30	30	40	40	50	60	25
Power Supply（KVA）	44	44	54	54	73	73	82	95	44
Weight（kg）	450	450	500	500	500	550	550	700	450
Size L×W×H（mm）	620×1010×2106								607×820×1593
Cooling Method	Forced air cooling
Blower Model	B-2000LN	B-2000LN	B-3000	B-3000	B-5000	B-5000	B-5000	B-7000	B-2000LN
Power（KW）	7.5	7.5	7.5	7.5	1.5	1.5	1.5	22	7.5
Rate of flow（m³/s）	0.46	0.46	0.46	0.46	11	11	11	1.6	0.46
Pressure（kpa）	3.5	3.5	8.8	8.8	7.7	7.7	7.7	8	3.5
Weight（kg）	140	140	180	180	255	255	255	340	140

Model	LEES-30LS4-445	LEES-40LS4-445	LEES-50LS3-445	LEES-60LS3-445	LEES-50LS4-445	LEES-60LS3-445	LEES-50LS4-445
	Φ200Φ400Φ44517×M10		Φ200Φ400Φ44517×M12			Φ200Φ300Φ400Φ500Φ55033×M12
Rated random excitation force/Sinusoidal excitation force(KN)	30	40	50	60	50	60	70
Shock Force（KN）	60/90*	80/120*	100/150*	120/180*	100/150*	120/180*	140/210*
Frequency Range（Nz）	5-2600	5-2600	5-2600	5-2600	5-2600	5-2500	5-2500
Max Acceleration（m/s²）	750	900	900	1000	900	730	850
Max Speed（m/s）	1.8	1.8	2	2	2	1.8	1.8
Max Displacement P~P（mm）	100	100	76	76	100	76	76
Max Loading（kg）	500	500	800	800	800	1000	1000
Shaker Model	ET-30LS4	ET-40LS4	ET-50LS3	ET-60LS3	ET-5OLS4	ET-60LS3	ET-70LS3
Equivalent Mass of Moving parts(kg)	40	45	55	55	56	82	82
Size of head expander(Working table)（mm)	445	445	445	445	445	550	550
Weight（kg）	2540	2540	4500	4500	4500	7300	7300
Isolation Frequency（Hz）	2.5	2.5	2.5	2.5	2.5	2.5	2.5
Size L×W×H（mm）	1328×854×1213		1730×1139×1293		1730×1139×1348	1820×1297×1373
Power Amplifier Model	SDA-30	SDA-40	SDA-50	SDA-60	SDA-50	SDA-60	SDA-70
Power Amplifier（KVA）	30	40	50	60	50	70	70
Power Supply（KVA）	54	73	82	95	82	95	108
Weight（kg）	500	550	550	700	550	550	700
Size L×W×H（mm）	620×1010×2106
Cooling Method	Forced air cooling
Blower Model	B-3000	B-5000	B-5000	B-7000	B-5000	B-7000	B-7000
Power（KW）	7.5	15	15	22	15	22	22
Rate of flow（m³/s）	0.46	11	11	1.6	11	1.6	1.6
Pressure（kpa）		7.7	7.7	7.5	7.7	7.5	7.5
Weight（kg）	180	180	255	340	255	340	340