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An inductive energy storage type isolated dc-dc converter and its control method

A DC-DC, isolated technology, applied in the direction of adjusting electrical variables, control/regulation systems, DC power input conversion to DC power output, etc., can solve problems such as large volume, numerous stray parameters, and difficulty in mastering principles, and achieve Enhanced common-mode noise suppression capability, realizing the effect of buck-boost conversion

Active Publication Date: 2022-04-08
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the isolation transformer as a passive component has a large volume when the switching frequency of the power electronic converter is low, and the parameter design of the isolation transformer is complicated, there are many stray parameters, it is relatively difficult to grasp the principle, and the high-power high-frequency transformer magnetic Difficulties in material processing and design restrict the development of large-capacity isolation transformers

Method used

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  • An inductive energy storage type isolated dc-dc converter and its control method
  • An inductive energy storage type isolated dc-dc converter and its control method
  • An inductive energy storage type isolated dc-dc converter and its control method

Examples

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Embodiment 1

[0030] Such as figure 1 As shown, one aspect of the present invention provides an inductive energy storage type isolated DC-DC converter, including a primary side loop, a secondary side loop and a controller.

[0031] The primary side loop includes the first power semiconductor switching element T 1U , the second power semiconductor switching element T 1M , the third power semiconductor switching element T 1L and the first capacitor, the first power semiconductor switching element T 1U , the second power semiconductor switching element T 1M , the third power semiconductor switching element T 1L are sequentially connected in series and form a first series branch, the first capacitor C 1 with the first series branch and the primary side DC voltage source V 1 in parallel. The first power semiconductor switching element T 1U and the second power semiconductor switching element T 1M There is a first node H between 1 , the second power semiconductor switching element T 1M...

Embodiment 2

[0041] Such as image 3 As shown, the other features of this embodiment are the same as those of Embodiment 1, the only difference is that the power semiconductor switching elements are IGBT, reverse conduction IGBT, IGBT and diode in series, and diode.

Embodiment 3

[0043] Such as Figure 4 As shown, the other features of this embodiment are the same as those of Embodiment 1, the only difference is that the series combination of power semiconductor switching elements is sequentially from left to right the series connection of IGBTs, the series connection of reverse conduction IGBTs, and the series combination of IGBTs and diodes. The overall series connection, the series connection of diodes, and the anti-series connection of reverse conduction IGBT.

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Abstract

The invention discloses an inductive energy storage type isolated DC-DC converter and a control method thereof, and relates to the field of power electronics and electric transmission. The inductive energy storage type isolated DC-DC converter includes a primary side loop, a secondary The side loop and the controller, and an inductor is connected between the primary side loop and the secondary side loop. The inductive energy storage type isolated DC-DC converter of the present invention utilizes the electrical isolation characteristics of the semiconductor power device itself when it is turned off to realize the isolation between the input and output of the converter, stores electric energy through the inductance, the input side charges the inductance, and the output side Absorb the energy of the inductor, through the time-sharing turn-on of the power semiconductor switch on the input side and the output side, the time-sharing transfer of energy is realized, combined with the switching characteristics of the semiconductor device, and then the electrical insulation between the input side and the output side can be realized to realize the output voltage and input voltage Electrical insulation, and can achieve buck-boost conversion, and without the use of isolation transformers.

Description

technical field [0001] The invention relates to the field of power electronics and electric transmission, in particular to an inductive energy storage type isolated DC-DC converter and a control method thereof. Background technique [0002] Isolated DC-DC converters are widely used in mobile phone chargers, car chargers, electric vehicle charging piles, power electronic transformers, modular multilevel converters, data centers, microgrids, and multi-converter module series-parallel combination systems , energy routers and other fields are widely used. [0003] Generally, isolated DC-DC converters include forward DC-DC converters, flyback DC-DC converters, push-pull DC-DC converters, half-bridge isolated DC-DC converters, full-bridge isolated type DC-DC converter, LLC type isolated DC-DC converter, etc. With the innovation of technology and the deepening of research, a variety of isolated DC-DC converters have emerged, but all isolated converters have isolation transformers...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/12
CPCH02M3/3353H02M1/12
Inventor 马俊鹏王顺亮张芮刘天琪
Owner SICHUAN UNIV
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