Converter and electric transmission system
A technology of converters and rectifiers, applied in the field of power electronics, can solve the problems of large weight and volume of generators, uncontrollable voltage and current of permanent magnet generators, and inability to adjust the phase sequence relationship between current and voltage, so as to improve efficiency and The effect of saving energy, reducing power loss and improving stability
Active Publication Date: 2019-07-16
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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Problems solved by technology
[0006] However, due to the use of a three-phase uncontrollable rectifier circuit, the voltage and current of the permanent magnet generator cannot be controlled, which makes it impossible to adjust the phase sequence relationship between the current and voltage, so that the generator's Excessive weight and bulk
Method used
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[0037] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.
[0038] Also, in the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without the specific details or in the particular manner described.
[0039] figure 1 A schematic diagram of a typical c...
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The invention discloses a converter, which comprises a main and auxiliary charging integrated rectifying circuit, a middle direct-current circuit and a main inverse circuit. The main and auxiliary charging integrated rectifying circuit is used for being connected with an electric generator and a traction transformer, and conducting alternating-direct conversion on a first alternating current transmitted by the electric generator or the traction transformer to obtain a first direct current; the middle direct-current circuit is connected with the main and auxiliary charging integrated rectifyingcircuit; and the main inverse circuit is connected with the middle direct-current circuit and used for conducting direct-alternating conversion on a direct current transmitted by the middle direct-current circuit to obtain a second alternating current. Through the converter, the power loss of the electric transmission system can be effectively reduced, and the efficiency of the electric transmission system can be effectively improved; and meanwhile, through the converter, the matching difficulty of the main inverse circuit, an auxiliary inverse circuit, a traction motor and related parameterscan further be effectively lowered, the weights and sizes of key parts in the main inverse circuit, the auxiliary inverse circuit and the traction motor are advantageously decreased, the efficiency of the electric transmission system is improved, and the energy-saving degree of the electric transmission system is increased.
Description
technical field [0001] The invention relates to the technical field of power electronics, in particular to a converter and an electric transmission system. Background technique [0002] In the field of domestic rail transit engineering vehicles, such as rail grinding vehicles, changing vehicles, and catenary operating vehicles, etc., are special engineering vehicles using dual-source systems, and most of them use diesel power packs plus power supply networks (such as AC25KV, DC150V and DC750V power supply networks etc.) power supply. [0003] In terms of internal combustion power, the diesel power packs of the above engineering vehicles all use a circuit structure of diesel engine, synchronous main excitation generator and three-phase uncontrollable rectification. The diesel power pack with this circuit structure has the disadvantages of large volume and weight. [0004] For dual-power internal combustion-electric EMUs, the electric transmission system needs to be placed on...
Claims
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Login to View More IPC IPC(8): B60L50/12B61C7/04H02M7/00
CPCB61C7/04H02M7/00B60L2200/26B60L2210/30B60L50/12Y02T30/00Y02T10/72Y02T10/7072
Inventor 周少云祁善军唐雄辉文宇良章志兵何良
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD