How to understand the sine wave and square wave ou

2022-09-29
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How to understand the sine wave and square wave output of UPS

sine wave (or some write pure sine wave) is of course the best. Its waveform is the same as that generated by electricity or generator, and it is even more perfect than that obtained by electricity, but modulating sine wave is not a simple thing, which requires complex control circuit; Therefore, the cost is bound to rise. Therefore, sine wave UPS generally only appears in units with a capacity of more than 5KVA, or in some interactive units. Unless the capacity of backup units is large, there are few

sine wave has the most efficient conversion of power frequency transformer, and can load all equipment that can be used on the mains. However, due to the cost problem, there are also many uses at present, such as: the modified sine wave that corrects sine wave and square wave, that is, it is not a sine curve, but countless small segments. They are made to look like sine curve by using artificial methods, that is, the modified sine wave. The modified sine wave is also called the modified sine wave. Although it is better than square wave, it is still not as good as sine wave

square wave is even simpler. A very simple push circuit can be made, but because the square wave waveform suddenly falls from the highest point to the lowest and then to the highest, the energy loss during this period is also huge, and if the unit capacity is large, this loss may cause damage to the machine itself. Therefore, Wang Wei said that the square wave system usually does not appear on large units, And it usually appears in the ups of the backup unit with a small capacity of several hundred volt ampere. The sine wave has the highest conversion efficiency and the lowest loss, followed by the modified sine wave and the square wave

sine wave in UPS power supply know how to calibrate and detect the pressure testing machine and the difference between square wave

ups power supply output has two situations:

a, direct output of mains power after simple voltage stabilization

b, the output of mains power or battery (DC voltage) after passing through the inverter

1. Backup UPS power supply

under normal mode (a): after voltage stabilization, the municipal power output is a pure sine wave

it is understood that under the battery mode (b): the DC voltage outputs a square wave after passing through the inverter

2. Interactive UPS

under normal mode (a): after voltage stabilization, the output of mains power is pure sine wave

battery mode (b): the output of DC voltage is non pure sine wave after passing through the inverter

3. The output of UPS bypass is pure sine wave

under normal mode (a): the output of mains power after passing through the inverter is non pure sine wave

battery mode (b): the output of DC voltage is non pure sine wave after passing through the inverter

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