Thermoelectric cooler ( TEC ) plays an important role in its application products. According to the characteristics, weakness and application range, the following problems should be determined when selecting TEC. 1.Determining TEC working state The size and direction of working current can determine the cooling, heating and constant temperature performance. Although cooling mode is most commonly used, cooling and constant temperature performance cannot be ignored. 2.Determining the actual temper...(more)
High reliability and long life time can be achieved when the thermal cycling times is few, the temperature change range is narrow, upper temperature limit is low, as well as that temperature change is slow. On the contrary, in a wide temperature range, high changing speed, many times cycling, it will shorten the life time of TECs largely. Its noteworthy that the absolute life time of TECs depends largely on the total cycling times, not the total time for the cycling. Different TECs will largely ...(more)
It can be seen as the reliability test for TECs to make continuous thermal cycling to TECs in a wide temperature rang. Especially temperature of TECs in this process rises to very high. Compared with most applications, this process will cause higher failure rate. Most of failures are rooted in unmatched thermal expansion coefficients of thermal materials and other components. This is inevitable. It performs as initial failure, but sometimes, performance degeneration will be observed before failu...(more)
Thermoelectric coolers ( TECs ) are built based on Peltier effect, which can both heat and cool depending on the direction of input DC current. Because of having no noise, no vibration, no refrigerant, light weight, compact size and some other advantages, TEC has been widely used for cooling certain components in electronic devices and radio communication equipment. There are some operating instructions that you should know before using TEC. Correct installation and usage 1.One side of TEC is mo...(more)
Thermoelectric cooler ( TEC ) is based on Peltier effect, which can both cool and heat. According to changing the polarity of direct current, the same TEC can realize cooling or heating. This effect is achieved by the principle of thermoelectric. In principle, TEC just plays a role of a heat transfer tool. Physical picture of TEC There are advantages as follows: 1.There is no need of any refrigerant and it can work continuously. 2.TEC has two functions, cooling and heating. In general, the cooli...(more)
In the installation process, its necessary to avoid wrong installation, which makes influence to the TEC modules . There are the following points that may affect the reliability of the TEC modules during the installation: a) TECs have high mechanical strength under pressure, but they have a small shear strength. Accordingly, TECs cannot be placed in a mechanical system that plays a main supporting role. Moreover, in the applications that may involves shocking and impact, its better to install th...(more)
In the system of optical communication, laser driver is an important part of an optical transmitter and it provides enough current to drive laser diode with direct modulation or enough voltage to drive electoral absorption device with indirect modulation. In order to meet different demands of design, our company has developed a variety of series of laser drivers and laser controllers : ultra-low noise laser controllers, high efficient laser controllers, high efficient laser drivers, dual channel...(more)
c) In order to avoid TECs losing effect due to obvious mechanical vibration, do not place any large mass device without support on the cold end of TECs. When involving lass mass device, its better to use chucking to fix the TECs between heat sinks and the object. Or place the device on a cold plate that can be media at first. At this time, damping screws can effectively increase the shear strength of the whole mechanical system. d) The TECs shall insulate from moisture in the air in order to avo...(more)
