Control method and device for train and its bidirectional dc-dc converter
A DC-DC, control method technology, applied in the field of vehicles, can solve problems such as affecting the working life of switching tubes
Active Publication Date: 2021-04-20
BYD CO LTD
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Problems solved by technology
Therefore, the problem existing in the related technology is that, regardless of the size of the target output power, the three Boost conversion branches all work simultaneously, causing the circuit elements to be in the working state for a long time and affecting the working life of the switch tube.
Method used
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[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0024] The following describes the bidirectional DC-DC converter control method, the bidirectional DC-DC converter control device, the bidirectional DC-DC converter and the train proposed by the embodiments of the present invention with reference to the accompanying drawings.
[0025] like figure 1 As shown, the bidirectional DC-DC converter according to one embodiment of the present invention includes a first conversion branch, a second conversion branch and a third conversion branch, and the first conversion branch, the second ...
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The invention discloses a control method and device for a train and its bidirectional DC-DC converter. The bidirectional DC-DC converter includes a first conversion branch, a second conversion branch and a third conversion branch connected in parallel, each The first conversion branch includes the upper bridge switch tube and the lower bridge switch tube connected in series and has a node, the backup bridge arm includes the series connected backup upper bridge switch tube and the backup lower bridge switch tube and has a first node, and the first nodes are respectively connected through the The control switch corresponds to the node connected to each conversion branch. The control method includes: obtaining the power to be output; judging the power range of the power to be output; When the output power is less than the preset power, control the transformation branch to work in turn; if any transformation branch is identified to be faulty, control the standby bridge arm to replace the bridge arm in the faulty transformation branch to work in turn, which can reduce the work of the switching tube Long time, prolong the life cycle of the bidirectional DC-DC converter.
Description
technical field [0001] The present invention relates to the technical field of vehicles, in particular to a control method for a bidirectional DC-DC converter, a non-transitory computer-readable storage medium, a control device for a bidirectional DC-DC converter, and a bidirectional DC-DC converter converter and a train. Background technique [0002] The bidirectional DC-DC converter has always been an important part of the power electronics field. With the development of the vehicle field, the DC-DC converter has also become one of the important components on the train. The bidirectional DC-DC converter in the related art usually adopts three Boost topology structures, that is, the output power of the bidirectional DC-DC converter is improved by connecting three Boost conversion branches in parallel, and the three Boost conversion branches are converted during the working process of the bidirectional DC-DC converter. Branches divide the total power equally. Therefore, th...
Claims
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IPC IPC(8): H02M3/10H02M1/32
CPCY02B70/10
Inventor 邬白贺王兴辉王超
Owner BYD CO LTD