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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
power supply; Then, visual reality of the computer by 10 or 16 for a group, each group by an air switch control, the entire Internet café Can be grouped into 4-6 groups or more. According to the load of each trunk, reasonable choice of power cord model. In general, the backbone of the use of copper core lines, the following branch lines can be used aluminum cor
notify the relevant personnel to leave the device and obtain the permission of the person in charge before pressurization. The regulator should be monitored and Sung during pressurization, high-pressure test staff, in all pressurization, should focus on not chatting with others, at any time to guard against exceptions. The operator shall stand on the insulation pad; 7. When the wiring is changed or the test is completed, the test
In the past, on-site cabling was very simple. The sensor can be either power-supply or passive. The power supply type requires 2, 3, or 4 cables, and the passive type requires only 2 cables. At the same time, the sensors are both analog-type and support 12, 24, 36, 48VDC, or 110, 220VAC voltages. The field controller p
When buying a computer, you are too concerned about the speed of the CPU, the memory capacity, the speed, and the hard disk capacity and speed, this is also the most transparent, and the majority of businesses are most willing to publicize and boast to use. However, we all ignore a very important issue. The power supply of the PC is the foundation for other compo
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
zhonggang, will you also consider the Usage Performance of the variable-frequency power source and the time for using the components?In fact, this is quite normal. After all, the frequency conversion power supply is also an electronic product. This idea is correct. So, let me first talk about the internal accessories
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
Most of the mobile power inside the use of lithium-ion batteries, when users operate or use improper, the battery may be due to a short circuit and then lead to security incidents, it has become an impact on the use of mobile power security a major hidden danger. The charging wire uses PVC plastic skin What is causing the short circuit of the mobile power
I have talked about the principle of variable frequency power supply before, but many users and enterprises still do not know it, and do not pay much attention to the normal maintenance and maintenance of Variable Frequency Power Supply in Hong Kong. When using the Frequency Conversion
to flow out. If all these factors are taken into account, the time required for the energy storage filter capacitor to fully power is several times larger than the above calculation result.In addition, the duty cycle of the anti-exciting switching power supply is constantly changed according to the output voltage. Whe
, and the hard drive indicator is often bright, can not hear the spindle motor and click the sound, unable to enter the operating system, but gently move the chassis or gently slap the chassis, it may return to normal. 2, read and write a large number of data is more prone to panic, almost every time after the restart caused by the partition table files and Fat files lost, and will lose the hard disk of important documents, music and pictures and so on. 3, when the random head can not be norma
"buzz" sound. If the fan is not working properly, it may burn the motor for a long time, causing damage to the whole switching power supply. For the above Power fan sound reasons, usually need to do the following maintenance work. The Power box is the easiest place to assemble dust, if the
Power Management Module ( PMM ) and power supply monitoring introductionPower Management Module and supply Voltage SupervisorI think power management and monitoring is a very complex and difficult to control part, not only involvesThe choice of source mode involves complex i
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
Recently the computer has always crashed, my CPU model is Intel Celeron, the core voltage by default of 1.5V, after the boot into the BIOS check to see the CPU operating voltage is only 1.2V. The computer has always been relatively stable, how can i solve this computer failure? [Analysis and exclusion] From the above analysis, Because the default operating voltage of the CPU is 1.475V, today, only 1.2V work voltage, so the reason for the computer often die is the CPU is not enough to cause, th
Powerbus Technology Powerbus is a power bus technology that is the only bus technology in the industry that can support high-power load power and high-speed communication, compared to other power-supply bus technologies: ①powerbus powe
ahead of time. In the switching power supply on the output capacitor is a special requirement, is generally required to work at a temperature of 105 degrees, low ESR, high ripple resistance. To the market to buy 10 parameters to meet the requirements of the 2200uf/16v Taiwan Teapo Electrolytic Capacitor, a total of 5 yuan. For safety, replace all four output cap
The cause analysis and solution of the power supply light of notebook computer is not bright/flashing continuously One, the power light is not bright First of all, The notebook power light is not lit, there are two situations: If the LEDs on the external
Among the many Internet Access Technologies, the emerging Power Line Communication technology is particularly eye-catching. The power supply's online network speed can reach 200 Mbps. This absolute advantage will threaten the Traditional Ethernet access power cord communication technology, the basic principle is to use existing
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