Introduction of Conducted Immunity Testing

Introduction of Conducted Immunity Testing

This paper is a brief introduction and description for conducted immunity testing which based on IEC 61000-4-4 fast transient burst test, IEC 61000-4-5 lightning surge test, IEC 61000-4-11 voltage cycle drop test and IEC 61000-4-12 ring wave test.

 

IEC 61000-4-4 establishes a common and reproducible reference for evaluating the immunity of electrical and electronic equipment when subjected to electrical fast transient/bursts on supply, signal, control and earth ports. The test method documented in this part of IEC 61000 describes a consistent method to assess the immunity of an equipment or system against a defined phenomenon.

 

IEC 61000-4-5 relates to the immunity requirements, test methods, and range of recommended test levels for equipment to unidirectional surges caused by over-voltages from switching and lightning transients. Several test levels are defined which relate to different environment and installation conditions. These requirements are developed for and are applicable to electrical and electronic equipment. The object of this standard is to establish a common reference for evaluating the immunity of electrical and electronic equipment when subjected to surges.

 

IEC 61000-4-11 defines the immunity test methods and range of preferred test levels for electrical and electronic equipment connected to low-voltage power supply networks for voltage dips, short interruptions, and voltage variations. This standard applies to electrical and electronic equipment having a rated input current not exceeding 16 A per phase, for connection to 50 Hz or 60 Hz A.C. networks. It does not apply to electrical and electronic equipment for connection to 400 Hz A.C. networks.

 

IEC 61000-4-12 relates to the immunity requirements and test methods for electrical and electronic equipment, under operational conditions, to non-repetitive damped oscillatory transients (ring waves) occurring in low-voltage power, control and signal lines supplied by public and non-public networks. The object of this basic standard is to establish the immunity requirements and a common reference for evaluating in a laboratory the performance of electrical and electronic equipment intended for residential, commercial and industrial applications, as well as of equipment intended for power stations and substations, as applicable.

LISUN Engineer do installation and training in Algeria

LISUN Engineer do installation and training in Algeria

 

This customer inquiry three months ago, and visit our company about two months ago to learn about our product deeply. They are a pretty LED lighting manufacture, and we believe that there would be many orders between us in the future.

 

After the visiting, they finally decided to purchase the devices we recommended them before: GDJS-013A High and Low Temperature Humidity Chamber, LVD-100KG Electrodynamic Vibration Generator System and SG61000-5SB Surge Generator. Our customer express that they are very satisfied with our service, and would cooperate with us again in the near future.

 

Many thanks to our customers for your support, we would try our best to provide the best products, the best price and the best service to you!

 

Below are a few photos of installation & training:

[caption id="attachment_9410" align="alignnone" width="600"] Figure 1: A photo of the customer and our engineer (right) in front of the High and Low Temperature Humidity Chamber[/caption]

[caption id="attachment_9411" align="alignnone" width="600"] Figure 2: The SG61000-5SB Surge Generator purchased by our customer[/caption]

[caption id="attachment_9412" align="alignnone" width="600"] Figure 3: The LVD-100KG Electrodynamic Vibration Generator System purchased by our customer[/caption]

Five kinds of LED Efficiency

Compare LED efficiency and life, the conception of efficiency is more complex. Firstly, there are three kinds of general efficiency, please check the Diagram 1.

	Luminous Efficiency(lm/W)	Conversion Efficiency
lamp beads	Connect lamp beads to DC power source directly, the rate of lamp beads flux and consumption power	Connect lamp beads to DC power source directly, the rate of light power and total consumption power.
	Luminous Efficiency= lamp beads flux/ consumption power	Conversion Efficiency= lamp beads light power/ total consumption power
Single LED in the application Environment	Connect lamp board to DC power source directly, the rate of lamp board flux and consumption power	Connect lamp board to DC power source directly, the rate of light power and total consumption power.
	Reflect the average luminous efficiency of lamp beads	Generally, do not consider this parameter
LED Power Driver	×	Connect with AC power, the rate of output power and input power
	×	Driver Conversion Efficiency=Driver output power(Pout)/Driver input power(Pin)
Total luminaries	Connect total luminaries to AC power source directly, the rate of output flux and input power	Connect total luminaries to AC power source directly, the rate of output light power and input power
	Total Luminaries Luminous Efficiency= Total luminaries Output flux/Input power	Generally, do not consider this parameter

 

Firstly, for lamp beads, there are two concepts of efficiency:

1. Lamp beads luminous efficiency, how much light can be issued every 1W input power. This efficiency is the indicator to measure the light efficiency of lamp beads, not the indicator to measure the light efficiency of total luminaries. Therefore, the light efficiency of single LED is the basic for the light efficiency of total luminaries; it is not equal to the light efficiency of the total luminaries.


2. Lamp beads conversion efficiency means that every 1W input power, how much power is used to emit light. Luminous efficiency is generally used. Conversion efficiency is often used to assess the development level of the chip.

Secondly, the efficiency of lamp beads in the application environment generally does not use. However, it is generally used to assess the quality of number of lamp beads, which is irrespective of the case without driver, the ratio of lamp beads direct consumed power in lamp board and the lamp board total luminous amount. The lumen amount calculated by this way can reflect the average luminous efficiency of a number of lamp beads, to determine the quality of number of lamp beads.

In addition, more people may be familiar with driver efficiency, it is the driver conversion efficiency that is the ratio of drive input power and drive output power.

Finally is the total luminaries luminous efficiency. This formula is simple; it is the ratio of luminaries luminous total amount and input total power. For the optical conversion efficiency generated by the lamp structure is a little special, lamp structure optical conversion efficiency=total luminaries total flux/lamp board total flux, which is defined as the ratio of the light emitted by lamp board of the light emitted by the total luminaries; this contains at least the optical attenuation because of expanding light board or translucent panel.

People usually confuse the total luminaries luminous efficiency and lamp beads luminous efficiency. We can roughly think the relationship between them: Total luminaries luminous efficiency=lamp beads luminous efficiency in the application environment-driver conversion efficiency –structure optical conversion efficiency.

In this relationship formula, we can see that total luminaries luminous efficiency should be less than lamp beads luminous efficiency, except the effect brought by the driver conversion efficiency mentioned above, there is also a problem often overlooked, that is the influence of lamp structure. Lamp structure influence is not only the influence of diffusion plate, especially for a side emitting type of lamp, its optical conversion efficiency is very low. It can be a bottleneck of side-emitting type of lamp. Therefore, if we say total luminaries luminous efficiency, you should deduct driver conversion efficiency and lamp structure conversion efficiency.

Efficiency is a relative complex concept in LED lighting. At the same time, we also need to point out that efficiency is not unchangeable; it can change with the work environment. For example, work temperature will make efficiency change. Therefore, when we talk about LED efficiency, not only we should point out which efficiency, but also efficiency in what temperature. Lisun LPCE-2(LMS-9000A) Spectroradiometer & Integrating Sphere system is for total luminaries luminous efficiency.

 

Lisun LPCE-2(LMS-9000A) Spectroradiometer & Integrating Sphere system is widely applied to Luminaries manufacturing enterprise and lab, such as Sharp Electronics in Memphis TN(USA), CS TECH MEXICO, S.A. DE C.V. (Mexico), DORADO Praha s.r.o. (Czech) etc. The reason why Lisun can win some many customers is because we always practice the motto of right products, right price and right service. Lisun will continue feedback good quality products and superior service in the feature.

 

LISUN Engineer Visit Turkey to do Installation & Training

LISUN Engineer Visit Turkey to do Installation & Training

 

LISUN’s after-sale service is absolutely the first class! The quality of our service won’t change due to the size of the order. Such as this customer, they purchased one set of LPCE-2 Spectroradiometer & Integrating Sphere LED Test System, LISUN arranged an engineer dedicated to provide the customer installation & training to their company. Our customer is very satisfied with the service, and said that they would like to continue cooperations with LISUN in the future.

 

Below is a photo of LISUN engineer (the left), our client (the right) and the LPCE-2 LED test system:

[caption id="attachment_9350" align="alignnone" width="800"] LISUN engineer (the left), our client (the right) and the LPCE-2 LED test system[/caption]

LISUN engineer Joye do installation and training in Korea

LISUN engineer Joye do installation and training in Korea

 

This time, our young engineer Joye Yang set off to do installation and training for our customer in Korea. This customer has purchased some instruments from LISUN before and they are very satisfied with our products and service.

 

They purchased LSG-1700B Rotation Luminaire Goniophotometer (Big Size), SG61000-5 Surge Generator and EMI-9KA EMI EMI Receiver System from us this time. Below is the group photo of our customer and Joye:

[caption id="attachment_9304" align="alignnone" width="800"] LISUN engineer Joye do installation and training in Korea[/caption]

 

Automotive LED Light

Automotive LED Light

 

In China, cars are becoming more and more popular. With the development of automobile industry, automotive lights are also developing. Automobile lights have experienced Incandescent Light, Halogen Light and HID(High-Intensity Discharge) Light, to the current era of Automotive LED Light.

 

Automotive LED Light has many advantages:

1. Energy-saving and Environmental Protection: LED directly converts power energy to light energy, power consumption is equivalent to one tenth of traditional lamp; it saves fuel consumption. LED spectrum is without ultraviolet and infrared, it has small glare. It does not contain mercury pollution. Waste can be recycled.


2. Life is long. LED life is very long.


3. Volume is small. Designer can change the lamp mode freely. Automobile style can be diversified.


4. Performance is stable, seismic performance is strong.


5. Reaction is fast and it does not require heat start time. It can prevent rear-end, which can ensure traffic safety.

 

Automotive LED light also has many problems to be resolved.

1. Cost problem. The price of LED light is generally higher than other traditional light sources.


2. Cooling problem. 80% of high power LED is converted to heat. If heat can’t be exported, it will make the temperature of LED interface too high, which will affect the product life cycle, luminous and stability.


3. Luminous Efficiency problem.


4. Electromagnetic Interference problem. Automotive electronic products are very sensitive to electromagnetic interference, especially the navigation system, wireless circuits and AM radio band machine.

 

As the leading manufacturer of test instrument, Lisun designed the EMS-ISO7637 Automotive Electronics Multifunctional Immunity Test System. This system is according to ISO7637, ISO16750, and GB/T 21437 standards, which is use for testing Road vehicles -- Electrical disturbances from conduction and coupling.

LISUN participate in the largest Lighting Fair in Russia - Interlight Moscow

LISUN participate in the largest Lighting Fair in Russia - Interlight Moscow

 

Interlight Moscow is held from November 7 to 10, 2017,  Interlight Moscow is not only the biggest show in Russia and Eastern Europe covering the whole range of products related to lighting, electrical engineering, home and building automation, but also the largest professional lighting exhibition among the Russian region and the CIS countries. LISUN got rich harvest through participating this exhibition.

 

In addition to the local lighting manufacturers in Russia, this exhibition also attracted professionals in lighting from the surrounding country. We promoted our brand, got many customers, won new orders, and also met professionals such as university professors, laying another cornerstone for our future development.

 

Finally, we share a few photos below:

[caption id="attachment_9276" align="alignnone" width="800"] Figure 1: Panorama of our booth[/caption]

[caption id="attachment_9277" align="alignnone" width="800"] Figure 2: LISUN engineer is introducing our Integrating Sphere & Spectroradiometer Test Systems[/caption]

[caption id="attachment_9278" align="alignnone" width="800"] Figure 3: LISUN engineer is introducing our other products to customers[/caption]