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Inductance energy storage type isolated DC-DC converter and control method thereof

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: 2022-02-25
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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  • Inductance energy storage type isolated DC-DC converter and control method thereof
  • Inductance energy storage type isolated DC-DC converter and control method thereof
  • Inductance energy storage type isolated DC-DC converter and control method thereof

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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 inductance energy storage type isolated DC-DC converter and a control method thereof, and relates to the field of power electronics and power transmission, the inductance energy storage type isolated DC-DC converter comprises a primary side loop, a secondary side loop and a controller, and an inductor is connected between the primary side loop and the secondary side loop. According to the inductance energy storage type isolated DC-DC converter, isolation between input and output of the converter is achieved by means of the electrical isolation characteristic of the semiconductor power device when the semiconductor power device is turned off, electric energy is stored through the inductor, the inductor is charged through the input side, energy of the inductor is absorbed through the output side, and the power semiconductor switches on the input side and the output side are turned on in a time-sharing mode. Time-sharing transfer of energy is achieved, electrical insulation of an input side and an output side can be achieved by combining switching characteristics of a semiconductor device, electrical insulation of output voltage and input voltage can be achieved, buck-boost conversion can be achieved, and an isolation transformer does not need to be used.

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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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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