According to reports recently organized by the Physicists Organization Network, the United States scientists have developed a new type of photovoltaic materials, solar panels made with it, low cost and high efficiency. For more than 40 years, scientists have been hoping to develop bulk photovoltaic materials that, in addition to the energy of ultraviolet light, can also harness the power of visible light and infrared light, and the new materials have finally made their way.
The new material was developed by scientists from the University of Pennsylvania and Drexel University and has three outstanding advantages. First, it produces thinner solar panels than silicon-based solar panels that currently dominate the market. Second, its raw materials are cheaper than the materials used in current high-end thin-film solar cells. Third, this material is a ferroelectric material, which means that its polarity can be turned on and off, contributing to the theoretical limitation of solar cell materials beyond the current photoelectric conversion efficiency.
Part of the reason for the low efficiency of solar panels is that particles collected from the sun will scatter around when they enter the solar cell. If you want all the particles to flow in one direction, you need multiple layers of different guiding materials. The particles will lose a little bit for each layer of material, which reduces the energy efficiency of solar cells. New materials make fewer solar cell guide layers and therefore less energy loss; moreover, ferroelectric materials use less energy to direct particles.
It took the scientists five years to finally design the new material, consisting of perovskite crystals of potassium citrate and lanthanum gallate. The results show that its performance far better than the current ferroelectric materials and can absorb 6 times more solar energy. The researchers said that further improvement and adjustment of the composition of the material will further increase energy efficiency.
Jonathan Spanneil of Drexel University’s Materials Science and Engineering said: “The new material is surprising because it consists of cheap, non-toxic and abundant elements, unlike the current high-efficiency thin-film solar cells. Composite semiconductor materials."
Researchers use a set of tools to prove that new materials can move energy in one direction rather than stagger between layers, thus minimizing energy loss. This ability is called the body-photovoltaic effect and has been known to scientists since the 1970s. But until now, scientists have observed this effect only in the ultraviolet rays. Actually, most of the sunlight's energy is in visible light and Infrared spectrum. With new materials, they finally observed this effect in visible light and infrared light.
Moreover, they also proved that by adjusting the percentage of new material components, the energy band gap of the material can be reduced. Spanneil said: "The band gap of this material is in the UV range, but only 10% increase in Niobium Niobate will make its band gap into the visible range and approach the ideal value of solar energy conversion efficiency. "(Liu Xia)
High Speed Door Motor And Control Box
Our company have German SEW Motor, Japan Mitsubishi Controller. Our own brand Hofic servo motor and controller. Chinese famous brand SEJ motor and Holip controller.
About our German SEW Motor and Japan Mitsubishi Controller: It is easy to find the ideal energy-efficient motor for your application at SEW. The series has a suitable design in its range for the globally applicable efficiency classes. Select the power and frequency within this motor design and you have already taken care of the most important selection criteria.All other motor options are of course available independently of the efficiency class. A comprehensive braking concept and cost-optimised built-in encoders ultimately complement the motor range. Comprehensive braking concept and combinations i.e. up to three different brake sizes per motor size featured in the range: Cost-optimised built-in encoders integrated into the motor. Motors for efficiency classes IE1 to IE4.Compact design saves space and costs. Future-proof, also as regards environmental protection (standards). Reduction in operating costs when using energy-efficient motors; our energy-efficient motors conform to the efficiency classes.
About servo High Speed Door Servo Control System: Our rolling gate servo control system is suitable for high speed and high usage soft and hard rolling gate. The whole system is in a small and light package, it has high torque and high operating speed, lower noise, high reliability, smooth and soft operating curves, it`s suitable for high speed and usage environment. The rolling curtain can be controlled by pull switch, push button, Bluetooth, ground radar, ground magnetic sensors. Operating Speed: 1M/s; Operating Width: ＜16 ㎡; Daily operating time: ＞2000 time; Rated voltage: 220v; Rated Output: 0.75 KW/1.5KW.
The system can operated via: 1) control box; 2) inching electronic control; 3) continuous automatic operation; 4) emergency stop; 5) single side operation box; 6) time delay; 7) ground radar and/or magnetic sensors. Please refer to Wiring Terminal for eternal connections.
System has fuse/safety wire shutdown switch for three-phase power protection, fuse/safety wire for operating circuit protection, and temperature sensing relay for motor protection.
Stroke Controller utilizes absolute value encoder. Connect the absolute value encoder and reducer via encoder`s axle, and fix the wings on to the reducer, than insert the aviation plug into plug receptacle.
The mounting screw for the control box must inspect regularly to prevent screw been getting loose and falling off. Check the internal and external wirings. Check and change the oil for the redactor on regular basis.
Precision: The system use Full closed-loop servo control and Double Encoder design. This is to ensure long operating life and to prevent overshooting during operating.
Stability: The system utilizes integrated design concept, in order to simplify internal wiring and prevent any function caused by wiring and terminal connections.
High Speed: Motor max speed is 2500 rpm; door max operating speed is 2 m/s.
Smooth: The torque servo system can adjust torque to the load automatically, and its speed curve mode step less speed regulating to ensure a smooth operation.
About SEJ motor and Holip controller: Three-phase asynchronous motor with magnetic brake has broad uses, It is suitable for various mechanical main drive and auxiliary drive, and it is also used for various required rapid stopping and correct positioning. The braking time within 0.2 second. Electric motor is added the DZM series direct current electromagnetic arrester by the basic series(Y series) electric motor.The protection class of electric motor part is IP44,the arrester part is IP23.if be applicable to bad environment can also make the arrester part into IP44,but customer have to put forward a special request while ordering,the manufactory can design a manufacturing exclusively. Its structure diagram is picture 1 and 2,picture 1 is the structure with hand release.Picture 2 is the structure without the hand release.Its operating principle BE, after being to make the retardation coil(6)to connect direct current power supply,because of the function of electromagnetic force,electromagnet(7)attract gag bit(5),and compress spring(24),make arrester disc(2)away from the friction surface of the gag bit(5)and shield(26)(the electrical motor can immediately operate normally).When the power supply cuts off after,the electromagnet(7)loses electromagnet force,the spring(24)releases the gag bit(5)and compress tightly to arrester disc(2),the arrester function,stop(the motor shaft)quickly,make electric motor shop turning to move,for the second time connect power supply will repeat above-mentioned action.
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Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.spiralfastdoor.com