A non-isolated dc-dc converter with large step-down ratio
A DC-DC, non-isolated technology, used in output power conversion devices, instruments, DC power input conversion to DC power output and other directions, can solve problems such as being unsuitable for large ratio step-down applications, and achieve small size , the working principle is simple, the number of effects is low
Active Publication Date: 2020-05-22
XI AN JIAOTONG UNIV
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Problems solved by technology
But the shortcomings are also obvious. The topology determines the voltage ratio. As the voltage ratio increases, the number of switched capacitors and active switch tubes increases. Therefore, the simple switched capacitor topology is not suitable for large variable ratio drops. Pressure application field
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[0027] The present invention is described in further detail below in conjunction with accompanying drawing:
[0028] refer to figure 1 , the non-isolated DC-DC converter with large step-down ratio according to the present invention includes a power supply Uin, a switched capacitor unit and a switched inductor unit, wherein the switched capacitor unit includes a first switch tube S1 and a second switch tube S2 , the third switch tube S3, the first capacitor C1 and the second capacitor C2, the switch inductance unit includes the first inductor L1, the second inductor L2, the fourth switch tube S4 and the fifth switch tube S5; the positive electrode of the power supply Uin and the One end of the first switching tube S1 is connected, the other end of the first switching tube S1 is connected to one end of the second capacitor C2 and one end of the second switching tube S2, and the other end of the second switching tube S2 is connected to the first capacitor C1. One end, one end of...
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The invention discloses a non-isolated high-step-down-ratio DC-DC converter. A positive electrode of a power supply is connected with one end of a first switch tube, the other end of the first switchtube is connected with one end of a second capacitor and one end of a second switch tube, the other end of the second switch tube is communicated with one end of a first capacitor, one end of a secondinductor and one end of a fifth switch tube, the other end of the second inductor is connected with one end of a fourth switch tube and one end of a load, the other end of the fifth switch tube is connected with one end of the first inductor and the other end of the load, the other end of the first inductor is connected with the other end of the fourth switch tube, the other end of the second capacitor and one end of the third switch tube, and the other end of the third switch tube and the other end of the first capacitor are connected with a negative electrode of the power supply. The numberof devices in the converter is small, and the converter can be applied to the application field of large-transformation-ratio voltage reduction.
Description
technical field [0001] The invention relates to a DC-DC converter, in particular to a non-isolated DC-DC converter with a large step-down ratio. Background technique [0002] Power electronics technology is an important supporting technology in the field of national economy and national security, and an important technical means to achieve energy conservation and environmental protection and improve people's quality of life. High-efficiency and high-quality power conversion is the ultimate goal of the development of power electronics technology. The invention is based on the basic theory of switched capacitance and switched inductance, and designs a brand-new non-isolated DC-DC converter with large step-down ratio. Non-isolated large ratio DC-DC converters are now widely used in DC distributed systems, portable electronic devices, communication systems, and voltage regulation modules. Especially in the voltage regulation module of the data center, with the rapid developmen...
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IPC IPC(8): H02M3/156H02M3/158
CPCH02M3/156H02M3/158
Inventor 王来利于龙洋朱梦宇杨成子马伟裴云庆杨旭
Owner XI AN JIAOTONG UNIV