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What is the most commonly heard in life? Production supply chain, power supply chain, also as a huge Chinese search field also has its own industrial chain, search engine in the middle platform, the terminal of the supply chain is to search users, the source of the supply chain (site) is China's 200 webmaster services

Q : What are the problems caused by insufficient power supply? A: If the power supply is insufficient, IPC may be unable to start, Infrared night vision switch failed, NVR may be hard to boot and other abnormal problems, please be sure to use the specifications required power. Q : Is it possible to use centralized power supply? A: Can, but due to

1, the hard disk appears bad track. Bad power is easy to cause the hard drive to appear false bad, this kind of fault can be repaired by software generally. In such cases, first check the power supply. If the problem is confirmed to be a power supply, the new power supply with reliable quality and stability should be replaced. 2, CD-ROM optical disk reading perf

This is a new review on trends in Ecology Evolution, which has an impact factor of more than 10, and has a very heavy weight in ecology. My graduate program is about evolution, which belongs to molecular ecology, population genetics, and the apparent heredity of the hotspot. So concise topic, immediately attracted me, but I do not understand supply and demand what exactly mean? Because the abstract talks about the status of the controversial epigenet

Nowadays, switching power supply has replaced linear regulated power supply and is active in the electronic power design field. People gradually realized that the switch power supply has changed the technical direction of the electronic design industry. In the power supply design, safety is always the first priority. I

Troubleshooting vswitch faults: for power supply faults and port faults, in the Internet era, you will often encounter troubleshooting vswitch faults. The following describes how to resolve vswitch faults, including how to solve power supply faults. No matter how good the performance of a switch device is, there will be potential faults. Just like people, no matter how healthy they are, there will always be

Enterprise Data Center is now more and more important, how to ensure the stable operation of enterprise data Center has become a key factor, UPS is currently a lot of enterprises in the data Center standard accessories, then how to choose a suitable enterprise application of UPS power. categories of UPS In general, the UPS system is divided into three categories, for back-up, on-line interactive and online. Different vendors will provide different configurations of UPS, the customer according t

One day, I repeatedly started the machine several times, and then pressed the power key, but it didn't respond. After my check, it turns out that the power supply is not working and there is no voltage on all the feet.At first, I thought the fuse was burned out due to frequent start, but I took the power off and saw that the insurance was good. Measured with a multimeter, the circuit is indeed powered on. Then, the DC voltage after the rectification b

Study on the application of Poe power supply (I.) Introduction to Guan Jinssong PMP 2010-4-2 Poe POE refers to the transmission of data signals to some ip-based terminals (such as IP telephones, wireless LAN access point APS, network cameras, etc.) while the existing Ethernet CAT.5 cabling infrastructure is not changed Ethernet It can also provide DC-powered technology for such equipment. Poe technology can ensure the existing structure wiring securit

The main working process of UPS power supply is filtering and rectifying inverter. In addition, it also includes many auxiliary units, such as charger and battery, microprocessor, and communication interface. Because the UPS power supply is installed between the device and the mains supply, it can filter out the electromagnetic interference in the power grid, the

leave temporarily (such as go out to buy food or visitors to walk a two hours), and at this time with a computer to deal with some of the more complex tasks, processing of data, if interrupted, the next open again load, the convergence is very troublesome, then choose "Sleep" is the best The biggest feature of "sleep" is the constant power of memory, which maintains the data. At the same time, there is another Exchange file to store this data, even in the sleep process accidental power outages

form of heat,In this way, engineers will have a great challenge in design, for example, if the loss is eventually transmitted in the form of heat, thenThe circuit needs to add a larger heat sink, the result is the volume of the power supply becomes larger, and the efficiency of the machine is very low.If switching power supply in switch mode, it can not only improve efficiency, but also reduce the design d

What is a voltage-adjustable power supply? What is the principle of voltage adjustable power supply? The voltage adjustable power supply is based on the regulated switching power supply to increase the voltage, so that the output voltage can be adjustable in a large range (generally 0 V ~ A type of power

June 30, 2015 – NetSuite, a leading provider of cloud-based finance/ERP software, today announced that it is committed to improving the sound input quality of smartphones, tablets and other mobile devices, and that the silicon microphone manufacturing industry is the leader Since the use of NetSuite cloud ERP, Akustic, a wholly-owned subsidiary of the Bosch Group, has significantly improved the efficiency of its supply chain across all regions. Based

1 PrefaceThe modern induction heat treatment technology is widely used because of its high quality, high efficiency, and environmental protection. As the basis of induction heat treatment technology, the IGBT module of the inverter has been commercialized and has successfully produced 10 ~ 100 kHz IGBT inverter power supply with hundreds of kilowatts of power. Practice has proved that the use of IGBT variable-frequency power

. Generally, after more than a dozen cycles, the voltage at both ends of the energy storage filter capacitor can be charged to the maximum value. For example, if the electrical inductance of the transformer secondary coil is 10-1000, and the capacity of the energy storage filter capacitor is 10000-1592, the following formula can be obtained: ω =, or F = Hz, T = 628 microseconds, 1/4 cycle is 157 microseconds; set the switching power supply to 40 kHz,

U disk is also required to power, if the power supply is not normal use, or the computer can not correctly identify. About the U disk because of power supply cause can not use also have many kinds of situations, some friends are desktop can not use, some are notebooks, some may be the reason for USB interface, below we will answer for everyone. 1, the desktop U disk power

1. Overview of three types of non-isolated DC-DC topologies 1.1Buck type converter The buck converter topology is shown in Figure 2.2 and the buck Converter is also known as a buck-type power supply topology. When the switching tube s is on, the diode VD negative voltage is higher than the positive reverse cutoff, at which time the current is fed through the inductance L to the capacitance and load, while the inductance L stores the energy. When the

If you use your mobile phone with the data line charge can not be charged, please replace a can only charge can not transmit data microUSB line to try, this may be mobile charger in the electricity transmission to the phone. You can try to connect other phones to the mobile power supply to see if there is a situation where the electricity can not be recharged into the phone, and if not, it could be a phone or data line problem. If the mobile power

size of the gate drive voltage, the driving voltage increases, the resistance becomes smaller. Detailed relationship curves can be obtained from the manufacturer's manual. This working condition, known as the synchronous rectification of the MOSFET, is a very important working condition in the low voltage high current output switching power supply. Forward cutoff equivalent circuit of power MOSFET (1): equivalent circuit (2): Description: The power