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Three-level rectification DC/DC converter

A three-level rectification and converter technology, which is applied in the direction of adjusting electrical variables, converting DC power input to DC power output, and instruments, etc., can solve the problem that LLC circuits are difficult to meet the requirements of bidirectional operation.

Pending Publication Date: 2022-03-08
DELTA ELECTRONICS SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LLC circuits are difficult to meet the bidirectional work requirements in practical applications

Method used

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  • Three-level rectification DC/DC converter
  • Three-level rectification DC/DC converter
  • Three-level rectification DC/DC converter

Examples

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Embodiment Construction

[0084] Some typical embodiments embodying the features and advantages of the present application will be described in detail in the description in the following paragraphs. It should be understood that this case can have various changes in different aspects without departing from the scope of this case, and that the descriptions and diagrams therein are used for illustration in nature rather than to limit this case.

[0085] figure 1 It is a schematic diagram of the circuit structure of the three-level rectification DC / DC converter of the preferred embodiment of this case, figure 2 show figure 1 The equivalent circuit of a three-level rectified DC / DC converter. Such as figure 1 and figure 2 As shown, the three-level rectifying DC / DC converter 1 includes a primary circuit 11 , a resonant cavity circuit 12 and a secondary circuit 13 , which can meet the requirements of bidirectional operation while having the characteristics of a resonant circuit.

[0086] The primary cir...

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Abstract

The invention provides a three-level rectifying DC / DC converter. The three-level rectifying DC / DC converter comprises a primary side circuit, a resonant cavity circuit and a secondary side circuit, the voltage between the two primary side ends of the resonant cavity circuit is a first voltage, and the voltage between the two secondary side ends of the resonant cavity circuit is a second voltage. The secondary side circuit comprises two clamping switches, a switch bridge arm and a capacitor bridge arm. The switch bridge arm comprises four switches which are connected in series. The two clamp switches are connected in series between a node between the first and second switches and a node between the third and fourth switches. The two secondary side ends are respectively connected between the second switch and the third switch and between the two output capacitors of the capacitor bridge arm; and a node between the two clamping switches is connected between the two output capacitors. And in the change period of the first voltage, the second switch is switched on for a preset time length after the falling edge, and the third switch is switched on for a preset time length after the rising edge.

Description

technical field [0001] This case is about a DC / DC converter, especially a three-level rectification DC / DC converter. Background technique [0002] Low-voltage / DC / DC converter, bidirectional OBC (on-board charger, on-board charger) and traction inverter are the three main power conversion units of electric vehicles, among which OBC is the energy conversion unit between AC and DC. The power battery for energy supply is indispensable in the configuration of electric vehicles. In recent years, with the continuous improvement of battery life of electric vehicles, the battery voltage is changing from the traditional 400V to 800V, and the OBC is gradually transitioning from the traditional single-phase charging to three-phase charging, so the rectified voltage from AC to DC will reach 800V. From this point of view, both the primary side and the secondary side of the DC / DC converter will involve the application of 800V. [0003] In the case where the traditional 650V withstand vol...

Claims

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Application Information

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IPC IPC(8): H02M3/335H02M1/32H02M1/088
CPCH02M3/33584H02M3/33592H02M1/32H02M1/088Y02B70/10H02M1/0009H02M1/0025H02M1/083H03B5/08
Inventor 贾民立孙浩张弛章进法包彼得
Owner DELTA ELECTRONICS SHANGHAI CO LTD
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