Bidirectional high-frequency isolation type DC/DC module
A technology of high-frequency isolation and two-way transmission, which is applied in the direction of control/regulation system, high-efficiency power electronic conversion, and regulation of electric variables, etc. It can solve the problems of two-way transmission, failure of traction motor to provide emergency energy, and failure to realize energy, etc., to achieve two-way The effect of flow, improving the operating range of the circuit, and increasing the power density of the system
Inactive Publication Date: 2020-02-07
ZHUZHOU CSR TIMES ELECTRIC CO LTD
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is that the existing vehicle-mounted auxiliary converter system cannot realize two-way
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[0025] 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.
[0026] The existing rail transit vehicle-mounted high-frequency auxiliary conversion system usually can only realize the one-way flow of energy, that is, the energy can only be charged by the traction DC bus through the high-frequency auxiliary conversion system to charge the battery and supply power for the auxiliary load, and the energy cannot be reversed. flow. Moreover, due to the limitation of capacity ...
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The invention discloses a bidirectional high-frequency isolation type DC/DC module for realizing bidirectional transmission of electric quantity. The bidirectional high-frequency isolation type DC/DCmodule is characterized by comprising: a three-level boosting and voltage reduction circuit; and two bidirectional LLC full-bridge resonance conversion circuits, wherein the two bidirectional LLC full-bridge resonance conversion circuits are respectively connected with the three-level boosting and voltage reduction circuit. The bidirectional high-frequency isolation type DC/DC module can be applied to a bidirectional high-frequency auxiliary conversion system to realize the bidirectional transmission of power between the traction intermediate DC bus and the auxiliary intermediate DC bus, thereby realizing the bidirectional transmission of electric quantity between a traction intermediate DC bus and an auxiliary intermediate DC bus, so that the bidirectional energy flow of the conversion system is realized, and the rail emergency traction demands are met. Specifically, the three-level boosting and voltage reduction circuit can also reduce the voltage and current stress of a chopper circuit while realizing bidirectional power transformation, and improve the working range of the circuit; and the bidirectional LLC full-bridge resonance conversion circuit can realize the electric isolation of the bidirectional power transformation and input/output, meanwhile all switching tubes thereof can realize zero-voltage turn-on when used as chopper tubes, and can achieve zero-current turn-offwhen used as rectifier tubes, thereby improving the transformation efficiency.
Description
technical field [0001] The invention relates to a vehicle-mounted power system, in particular to a wide-range bidirectional high-frequency isolation DC / DC module capable of realizing bidirectional transmission of power between a traction intermediate DC bus and an auxiliary intermediate DC bus. Background technique [0002] With the popularization of bullet trains and high-speed rail, rail transit has become a common mode of transportation. The traditional on-board auxiliary converter system for rail transit has the problems of large volume and low power density, and the energy of the existing high-frequency auxiliary converter system for rail transit can only be transmitted in one direction, that is, the energy can only be transmitted by the traction DC bus through the high The frequency auxiliary conversion system charges the battery and supplies power to the auxiliary load, and the energy cannot flow in reverse. [0003] The existing high-frequency auxiliary conversion s...
Claims
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Login to view more IPC IPC(8): H02M3/335
CPCH02M3/3353H02M1/0058Y02B70/10
Inventor 周峰武张小勇饶沛南曹金洲张庆
Owner ZHUZHOU CSR TIMES ELECTRIC CO LTD
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