Uninterruptible power supply
A power supply and voltage technology, which is applied in the direction of current collectors, emergency power arrangements, battery circuit devices, etc., can solve the problems of magnetic flux saturation and inrush current, uninterruptible power supply production cost and volume increase, etc. , to achieve the effect of reducing impact and taking quality into account
Active Publication Date: 2013-01-16
DELTA ELECTRONICS INC +1
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Problems solved by technology
[0006] However, the above-mentioned methods will not only increase the production cost and volume of the UPS, but also can only suppress the inrush current phenomenon of a single load
If the uninterruptible power supply's power supply includes multiple inductive loads with different ratings and different start-up times, the above methods still cannot effectively solve the problems of magnetic flux saturation and inrush current
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[0145]Some typical embodiments embodying the features and advantages of the present invention will be described in detail in the description in the following paragraphs. It should be understood that the present invention can have various changes in different aspects, but all of them do not depart from the scope of the present invention, and the description and drawings therein are used for illustration in nature, not for limiting the present invention. invention.
[0146] see figure 1 , which is a schematic circuit diagram of an uninterruptible power supply according to a preferred embodiment of the present invention. Such as figure 1 As shown, the input side of the uninterruptible power supply 1 receives the three-phase commercial power V provided by the power supply system (not shown in the figure). in1 ~V in3 , and the output side of the uninterruptible power supply 1 is connected to a first inductive load 2a and a second inductive load 2b, such as a three-phase transfo...
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The invention discloses an uninterruptible power supply, which comprises a rectifier circuit generating DC voltages, an energy storing unit, an inverter circuit for switching the DC voltages into three-phase modulating voltages, a filtering circuit, a bypass switch circuit and a control circuit, wherein the bypass switch circuit makes three-phase load voltages used as a three-phase electric supply or three-phase inverter voltages; and the control circuit controls the operation of the uninterruptible power supply. When the three-phase electric supply is interrupted or abnormal, the bypass switch circuit and the inverter circuit work; at the moment that a second inductive load works and in the later steady state, the control circuit can adopt magnetic flux compensation strategies in different operating modes to adjust the value of the three-phase load voltages, thereby compensating or correcting the magnetic flux of the second inductive load; and therefore, the magnetic flux distribution of the second inductive load does not cause the state of magnetic saturation.
Description
technical field [0001] The invention relates to a power supply, in particular to an uninterruptible power supply with the function of suppressing surge current. Background technique [0002] With the rapid development of the information industry and high-tech industry, most precision electronic instruments and equipment need to rely on high-quality power supply to maintain normal operation. Among various power supply methods, the Uninterruptible Power Supply (UPS) can not only ensure the reliability of the power supply source, but also provide high-quality power waveforms, so that the Uninterruptible Power Supply has become an An optimal solution for providing high-quality power. [0003] Generally speaking, the uninterruptible power supply is disposed between the external power supply system and the load. When the power quality provided by an external power supply system such as commercial AC is sufficient to meet the needs of the load, the uninterruptible power supply ca...
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IPC IPC(8): H02J7/00H02H9/02H02J9/06
Inventor 蔡文荫廖仁诠郑博泰陈淯星
Owner DELTA ELECTRONICS INC