博文

目前显示的是 十月, 2018的博文

Compare 48V power and 12V power from cost

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The cost mainly considers the difference between the four parts. We compare the whole power system. The first is the power plug-in box, because  48V DC power supply  in the telecommunications industry, large-scale application, low cost, single watt cost is much lower than the 12V server power price. Moreover, there is no calculation of the total cost difference caused by the need for multiple power plug-ins in the 12V architecture, while the 48V architecture only needs a single plug-in box. Secondly, the battery BBU, as mentioned earlier, the 12V BBU structure of the battery is often required to regulate DC / DC power supply, and the 48V structure is not required to configure, this part of the battery BBU using 48V structure is also very advantageous; Secondly, the bus bar and other transmission and distribution, because the 48V structure greatly reduces the size and number of copper bars, and only a single plug-in frame, this part of the 48V structure also has a great cost advantage;

The basic principle of PWM

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The basic principle of pulse width modulation (PWM): The control method is to control the on and off of the switching device of the  inverter  circuit, so that the output end can get a series of pulses with equal amplitude, and use these pulses to replace the sine wave or the required waveform. That is to say, a plurality of pulses are generated in the half period of the output waveform, so that the equivalent voltage of each pulse is sinusoidal waveform, and the output is smooth and the low-order harmonics are few. By adjusting the width of each pulse according to certain rules, the output voltage and frequency of the inverter circuit can be changed. For example, by dividing the sinusoidal half-wave waveform into N equal parts, the sinusoidal half-wave can be regarded as a waveform composed of N pulses connected to each other. The pulse widths are equal to ∏/n, but the amplitudes are different, and the top of the pulse is not a horizontal line, but a curve. The amplitudes of each p

Stainless steel process for outdoor cabinets

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Outdoor stainless steel cabinet technology is constantly improving, so that stainless steel cabinet has the best anti-vibration, anti-impact, anti-corrosion, anti-dust, waterproof, anti-radiation performance, in order to ensure that the equipment works stably and reliably. All designs are people-oriented, so that users can use more smoothly, SOROTEC focused on stainless steel  outdoor cabinet  technical design, and technical updates. Stainless steel cabinet is the most commonly used toughened glass doors and mesh doors. And its quality plays a key role. Usually, the front and rear door panels are never allowed to have distortion, expansion, depression, burrs and other phenomena, its flatness is usually less than 2 mm. The difference in the same slot also needs less than 2 mm, and the installed door panels can not have obvious upward or downward adverse phenomenon, to ensure the flexibility of disassembly and assembly. When opening and closing the door, it must be flexible. The ang