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Combined type DC transformation system and control method thereof

A technology of DC conversion and DC converter, which is applied in the direction of DC power input conversion to DC power output, control/regulation system, and adjustment of electrical variables, etc. It can solve problems such as increasing the complexity of circuit topology and increasing the difficulty of control

Active Publication Date: 2019-06-04
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above solutions increase the complexity of the circuit topology and increase the difficulty of control
In addition, frequency conversion control is still used, which cannot avoid electromagnetic interference problems caused by wide-ranging changes in switching frequency

Method used

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  • Combined type DC transformation system and control method thereof
  • Combined type DC transformation system and control method thereof
  • Combined type DC transformation system and control method thereof

Examples

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Embodiment Construction

[0033] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] as attached figure 1 , attached figure 2 , attached image 3 And attached Figure 4 As shown, the combined DC conversion system consists of an input DC voltage source (V in ), DC transformer, dual-input DC transformer or dual-output DC transformer, non-isolated DC converter and load (R o )composition. The DC transformer includes a DC voltage input terminal (v 1 ) and a DC voltage output (v 2 ). Non-isolated DC converters consist of a DC voltage input (v 3 ) and a DC voltage output (v 4 ). Dual-input DC transformers consist of two DC voltage inputs and one DC voltage output (v 7 ), the two DC voltage input terminals are respectively the first DC voltage input terminal (v 5 ) and the second DC voltage input terminal (v 6 ). Dual output DC transformers contain a DC voltage input (v 8 ) and two DC voltage output terminals,...

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PUM

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Abstract

The invention discloses a combined type DC transformation system and a control method thereof, and belongs to the technical field of power electronic transformers. The combined type DC transformationsystem is composed of a DC transformer, a double-input or double-output DC transformer and a non-isolated DC transformer. The combined type DC transformation system directly transfers most input powerto a load, system power loss is reduced, and the system efficiency is improved; the DC transformer and the double-input and double-output DC transformers work in open loop in the optimal state, circuit parameters are optimized in design, and the total efficiency is improved further; and the combined type DC transformation system is especially suitable for high-efficiency reliable large-power DC-DC electric energy transformation occasions including aerospace, military weapons, smart power grid, new energy power generation, new energy automobile and data center power supply systems.

Description

technical field [0001] The invention relates to a combined direct current conversion system and a control method thereof, belonging to the technical field of power electronic converters, in particular to the technical field of direct current-direct current electric energy conversion. Background technique [0002] DC-DC power conversion is widely used in various fields of the national economy such as aerospace, military weapons and equipment, smart grids, new energy power generation, new energy vehicles, and data center power supply systems. According to whether the DC / DC converter is isolated, it can be divided into isolated DC / DC converter and non-isolated DC / DC converter. According to the input and output voltage relationship of the DC converter, it can be divided into a step-up DC / DC converter and a step-down DC / DC converter. For example, in a photovoltaic power generation system or a fuel cell power generation system, the voltage generated by a single photovoltaic cell ...

Claims

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Application Information

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IPC IPC(8): H02M3/158H02M3/335
Inventor 贾益行吴红飞刘越邰雨邢岩
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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