Unlock instant, AI-driven research and patent intelligence for your innovation.

A power adjustable LC input series output parallel DC transformer and its control method

A DC transformer and series output technology, which is applied in the direction of converting DC power input to DC power output, adjusting electrical variables, and controlling/regulating systems, can solve problems such as unfavorable filter design, and achieve easy to implement and simple control methods , The effect of facilitating the promotion and application

Active Publication Date: 2021-06-22
SOUTHEAST UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the main disadvantage of the series resonant converter is that the voltage transfer gain curve is approximately a horizontal line at no-load, in order to adjust the output voltage, the switching frequency needs to be changed significantly, which is not conducive to the design of the filter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A power adjustable LC input series output parallel DC transformer and its control method
  • A power adjustable LC input series output parallel DC transformer and its control method
  • A power adjustable LC input series output parallel DC transformer and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070] The following is an ISOP DC transformer composed of two LC series resonant converter modules and an auxiliary bridge arm module (such as figure 2 shown) as an example, and in conjunction with the simulation results to illustrate the working principle of the technical solution of the present invention. The simulation parameters are as follows:

[0071] Simulation main parameters

[0072]

[0073] figure 2 For the topology structure diagram of the ISOP DC transformer of the two modules including the auxiliary bridge arm module, see image 3 For the control method, the driving signal of the converter is given according to the control method of the premise, that is, the LC series resonant converter module adopts a 50% duty ratio open-loop control mode, and the auxiliary bridge arm module adopts a single-transistor open mode. Figure 4 The main working waveforms of the LC series resonant converter module under the corresponding driving signals are given.

[0074] At...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a power-adjustable LC input series output parallel DC transformer and a control method. The DC transformer includes a plurality of LC series resonant converter modules and an auxiliary power control bridge arm. Among them, the open loop of the LC series resonant circuit works at the resonant frequency to realize zero-current switching. When the power is transmitted in the forward direction, the upper tube of the auxiliary bridge arm module is continuously turned off and the diode is used for freewheeling, and the lower tube is turned on at a certain duty cycle; when the power is transmitted in the reverse direction, the lower tube of the auxiliary bridge arm module is continuously turned off and the diode is used. For freewheeling, the upper tube is turned on with a certain duty cycle. The power of the entire DC transformer can be adjusted by adjusting the duty cycle of the upper tube or the lower tube of the auxiliary bridge arm module. Therefore, the purpose of power adjustment is achieved without frequency conversion.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a power-adjustable LC input series output parallel DC transformer and a control method. Background technique [0002] As an important branch of power electronics integration technology, the multi-converter series-parallel system has been a research hotspot in recent years. Since the multi-module series-parallel system has the advantages of reducing development difficulty, facilitating expansion, realizing system redundancy, and high reliability, it is widely used in systems such as distributed power generation, power electronic transformers, and uninterruptible power supplies. For multi-converter series-parallel systems, systems with different series-parallel combinations are used in different situations. Take the ISOP (Input Series Output Parallel) system as an example, which is suitable for high voltage input and high current output occasions. For exampl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/088
CPCH02M1/088H02M3/33576H02M1/0074Y02B70/10
Inventor 陈武姚金杰薛晨炀
Owner SOUTHEAST UNIV