Reconfigurable DC/DC converter
A technology of converter and switching switch, which is applied in the direction of output power conversion device, conversion of DC power input to DC power output, instruments, etc., which can solve the problems of reduced power conversion efficiency, low equipment utilization rate, and unsuitable energy storage, etc., to achieve The effect of reducing energy conversion links, reducing construction costs, and saving input
Pending Publication Date: 2017-12-26
重庆聚陆新能源有限公司
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Problems solved by technology
For example, to transfer the energy of the energy storage battery to the output bus of the DC fast charging pile, it still needs to go through two DC / DC converters, one of which is connected to the energy storage battery and the public DC bus, and the other DC / DC The converter is connected to the public DC bus and the output bus of the DC fast charging pile. On the one hand, this reduces the power conversion efficiency; Each converter has a considerable idle time, and the utilization rate of the equipment is low
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[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be described in detail below in conjunction with specific embodiments. Obviously, following examples will help those skilled in the art to further understand the present invention, but it does not constitute limitation of the present invention, for those skilled in the art, can create similar under the general idea of the present invention Attached picture. These all belong to the protection scope of the present invention.
[0029] figure 2 The structure diagram of a non-isolated DC / DC converter as the basic two-port DC / DC converter includes a non-isolated DC / DC converter and two switches K1 and K2. In the structure based on non-isolated DC / DC, the two switches need to realize the single-pole double-throw function. For the changeover switch K1, its common contact is connected to the positive pole of the D port, and th...
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The invention relates to a reconfigurable DC / DC converter, and belongs to the technical field of power electronic technology and new energy. The reconfigurable DC / DC converter comprises a DC / DC converter body, a first changeover switch and a second changeover switch, the DC / DC converter body is provided with three external ports connected with direct-current loads or power supplies, an internal DC / DC converter body is used for converting the power of two internal ports, the first changeover switch is used for connecting the external port I or the external port III to the internal port I, and the second changeover switch is used for connecting the external port II or the external port III to the internal port II. The internal two-port DC / DC converter can be reused in a time sharing manner, and power conversion between any two of the direct-current loads or the power supplies connected with the three external ports is realized, so that the number of power devices is decreased. Charging of an energy storage battery by a power grid and charging of an electric vehicle by the energy storage battery are realized by only one basic two-port DC / DC converter, and charging efficiency and equipment utilization rate are remarkably increased.
Description
technical field [0001] The invention relates to the technical fields of power electronics and new energy, in particular to a reconfigurable DC / DC converter. Background technique [0002] The DC microgrid directly exchanges power between the DC power supply and the load through the common DC bus without going through the intermediate process of AC conversion. The DC side of most DC power sources such as energy storage batteries and active rectification can also operate in DC load mode, and its power is bidirectional. The output voltage type of energy storage batteries and most renewable energy sources is DC, and many residential and commercial loads are DC internally. Even high-power industrial applications such as variable frequency drives also require DC voltage. The current rapid development of DC fast charging piles for electric vehicles is also an increasingly large DC load. The energy storage battery connected to the public DC bus can directly provide energy to the DC...
Claims
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Login to View More IPC IPC(8): H02M3/00
CPCH02M3/00H02M1/0083
Inventor 陆帅姚志刚宋扬
Owner 重庆聚陆新能源有限公司