Peltier controller is a thermal electric device, which is used to drive thermal electric coolers (TECs). The Peltier controller is packaged in a compact metal enclosure (see figure 1), which keeps it user-friendly. And the packaging method can also block the interferences from other electronics.(more)

Various types of laser drivers can be found in the product line of Analog Technologies, Inc. If you are looking for a proper laser driver, just look at here. The laser drivers are designed and developed for different purposes: ultra low noise, high efficiency, or constant current, etc. All types of laser drivers are of high quality and low cost.(more)

The working voltage and current of TEC can be regulated. In the actual working conditions, its cooling capacity, input power and refrigeration coefficient also change with the working voltage and current. According to the current change, the following is about the analysis of cooling capacity and refrigeration coefficient.(more)

During cooling process, thermoelectric cooler (TEC module) has dynamic changes in its current, voltage, and temperatures in hot and cold ends, so its performance changes dynamically too. The research on dynamic cooling effect of TEC is good to improve the operating performances of these devices. (more)

TEC modules, also called Peltier cooler, is a compact electronic components based on semiconductor materials. When injecting a DC current in the two ends of peltier cooler, the heat will be transfer from one side of the component to the other side. It's worth mentioning that with the current direction change, the heat flow direction will be changed. Therefore, both cooling and heating can be achieved in a TEC module, which can be used to control temperature with precision.(more)

The thermodynamic law can be applied to both TEC modules and traditional mechanical cooler.(more)

In actual applications, thermoelectric cooler includes two or more couples of semiconductor galvanic arms. Put electric and heat conductive inducer in series to make a single component. A TEC module is made up of one or multiple such single component in series from the view of current path, and in parallel from the view of heat path. The single component and inducer is generally installed between the two ceramic plates, which are used to connect all the parts mechanically, and keep every single component and other structure insulated from the outer soldering surface. When all the parts are correctly installed, the TEC module usually has a square shape with the height of 2.5-5mm.(more)

From (3), (13) and (14), it is shown that when Th -Tc>△Tmax, the cooling capacity qc<0. At the same time, TEC cannot cool, but start heating, which is not allowed in practical work. So the working current should be controlled in range of I0≤I≤Isat, which can ensure the cooling capacity qc≥0. Although based on the analysis of the cooling capacity qc, the general range of working current can be determined, but in practical work, the refrigeration coefficient is still an important indicator. From (9), when the working current of TEC satisfies the following relations, the TEC can reach the maximum refrigeration coefficient βmax:(more)

3 Thermoelectric materials In the view of the research and development of thermoelectric materials, lead telluride is used as a thermoelectric material in the early days, and then TAGS alloy is developed for P-type element (N-type is still PbTe). The temperature of the hot end can be up to 600℃. After using new thermoelectric materials in hundred watt thermoelectric generator and universal thermoelectric generator, the hot end temperature can reach 1000℃ and its mechanical properties and oxidation resistance are very good. In the condition of high temperature, this material is not easy evaporated and can work in vacuum and in air.(more)

Low dimensional thermoelectric (0~3D) material is a new research in recent years. Because of the function of the quantum well and quantum wire, low dimensional material has extraordinary thermoelectric property. The low dimension can increase α and phonon boundary scattering of the potential well surface. Terry M Tritt obtained the different dimension curve of Bi2Te3 with the change of quantum welldW(quantum wire thickness). The result shows that three dimensional material do not change with the change of dW; however, in the condition of the dimension reduction, the value of ZT will increase sharply when dW reduces, which shows that low dimensional material can improve ZT value of thermoelectric materials.(more)