Hydraulic excavator is a kind of multifunctional machinery, which is widely used in water conservancy engineering, transportation, electric power engineering and mining excavation and other mechanical constructions. Plays a very important role. Small Digger,Mini Excavator Trailer,Mini Hydraulic Excavator,Hydraulic Mini Excavator Shandong Nuoman Engineering Machinery Co., Ltd , https://www.chinanuoman.com
Governments are increasingly demanding energy-saving requirements to motivate dimmable light-emitting diode (LED) lighting requirements. To achieve high-performance dimming and solve flicker problems, Texas Instruments has released two highly integrated phase-adjustable phases. The AC-DC LED lighting driver can fully meet the dimming requirements of retrofit bulbs, LED ballasts, downlights and spotlights.
Xiao Yizhou, a senior application engineer for power applications in the Analog Devices market in Texas, said that traditional light bulbs can also be dimmed, but they are more power-hungry and have a shorter lifespan, making traditional bulbs that are dimmable must be repaired frequently. Introducing the LED light of the dimmable power driver IC, not only taking into account the advantages of LED energy saving 80, the service life of at least 20,000 hours, but also dimming, improving energy efficiency and accelerating the replacement of energy-saving LED lighting. Traditional light bulbs.
For the flag-saving energy-saving LED lighting market, Texas Instruments has introduced the TPS92070/LM3448 dimmable series. Its high current accuracy feature allows customers to accurately define the upper and lower limits of current, eliminating the time cost of customer calibration. Due to its high-performance structure, it can reduce the surrounding parts supporting the driver IC, further reducing the cost of customers.
Xiao Yizhou further pointed out that at present, Texas Instruments' series of dimmable driver ICs are mainly sold to Japan, Europe and the United States. However, due to different safety standards, the required driver IC specifications are not the same. For example, because the structure of the TPS92070 is designed to be isolated and safe, it can meet the safety requirements of the United States. The main shipment in Japan is the LM3448 without isolation design, and the isolation design has an impact on the overall cost of LED lamps. For 2, everything depends on customer needs.
Xiao Yizhou said that under the requirements of relevant energy-saving regulations, currently developed countries such as Japan, Europe and the United States have adopted a large number of LED lamps with dimmable driver ICs, while developing countries such as China have no relevant regulatory requirements. The lower cost, non-dimmable LED luminaires are used. As for Taiwan, although there are no relevant regulatory requirements, there are already lighting manufacturers that have introduced dimming driver ICs. Most of their applications are still dominated by the entertainment lighting market. General indoor lighting, outdoor lighting and emergency lighting have not begun to spread. In the future, if energy conservation regulations are further developed, it is believed that energy-saving LED lighting will be more prevalent.
Mini Excavator,The hydraulic drive of the excavator is closely linked, and its development is mainly based on the application of hydraulic technology. Its structure is mainly composed of engine, hydraulic system, working device, walking device and electrical control. Due to the harsh working conditions of the excavator, the required action is very complicated, so it puts high requirements on the design of the hydraulic system The hydraulic system is also the most complicated in the hydraulic system of construction machinery. Therefore, the analysis and design of the hydraulic system of the excavator has become an important part of promoting the excavator. The single-bucket hydraulic excavator is a kind of mechanical equipment for periodic operation. It consists of three parts: working device, slewing device and walking device. The working device includes a moving stick and various replacement equipment that can be replaced according to the work needs, such as front shovel, backhoe, loading bucket and grab bucket. The typical working cycle is as follows: (1) Excavating hard soil, generally during excavation Mainly stick action, use bucket cylinder to adjust cutting angle, cooperate with excavation; when digging in soft soil slope, the main action is bucket cylinder; in special excavation action, use bucket cylinder , Stick cylinder and boom cylinder combined action to ensure that the bucket moves according to a specific trajectory. (2) The full bucket lift and rotary excavation are completed, the bucket cylinder is pushed out, the arm cylinder is raised, and the full bucket is lifted; at the same time, the rotary motor is started, and the rotary table rotates in the direction of unloading soil. (3) The unloading turntable is transferred to the unloading location. The turntable brake bucket rod cylinder adjusts the discharge radius. The bucket cylinder is retracted and the bucket is unloaded. When there are strict requirements on the unloading position and height, it is necessary to move the arm kr to cooperate. (4) After the unloading is completed, the turntable rotates in the reverse direction, and at the same time, the boom cylinder and the arm cylinder cooperate to move the empty bucket down to a new digging position. The single-bucket hydraulic excavator has a very wide range of applications in construction, transportation, water conservancy construction, open-pit mining and modern military engineering. It is an indispensable main mechanical equipment in various earthwork constructions.