Control method for full-load input voltage equalizing of input-series-output-parallel combination converter

A technology of series output and control method, which is applied in the direction of irreversible DC power input conversion to AC power output, DC power input conversion to DC power output, and AC power input conversion to DC power output, etc., to achieve good stability and design. Reasonable and reliable effect

Inactive Publication Date: 2009-01-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0006] The purpose of the present invention is mainly to address the shortcomings of the above-mentioned existing ISOP combined converters that cannot realize voltage and current equalization under no-load or light-load conditions, and to provid

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  • Control method for full-load input voltage equalizing of input-series-output-parallel combination converter
  • Control method for full-load input voltage equalizing of input-series-output-parallel combination converter
  • Control method for full-load input voltage equalizing of input-series-output-parallel combination converter

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Embodiment Construction

[0021] The accompanying drawings disclose several specific embodiments of the present invention without limitation, and the present invention will be further described as follows in conjunction with the accompanying drawings.

[0022] See attached figure 1 , is the block diagram of the input series output parallel combined converter of the topology module in which the isolated DC converter used in the present invention is, V in the figure in Indicates the input high-voltage DC power supply, and the ISOP combined converter with n modules as shown in the figure can convert the input high-voltage DC power supply into a suitable load R ld The required DC power supply, C in the diagram d1 ~C dn It is connected in series with n high-voltage DC power supply V in The voltage-dividing capacitors at both ends, and the lower voltages at both ends of each voltage-dividing capacitor can provide the corresponding working power supply for the corresponding topology modules No. ld It need...

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Abstract

The invention relates to a control method for sharing voltage when inputting full load of an input-series-output-parallel combined converter. A sinusoidal modulation signal with a phase difference of Pi/n is increased on basis of the output signal vo_EA of a sharing output voltage regulator and the output signal vcd_EAi of each module input voltage-sharing regulator included in the drive signals of each input-series-output-parallel topology module control terminal. The increased sinusoidal modulation signal together with the signals vo_EA and vcd_EAi as a new error signal of each circuit is intersected with sawtooth waves VRAMPi inside a control chip to obtain a drive signal of each topology module switching tube, thereby controlling the ordered turn on and off of each topology module switching tube. The introduction of sinusoid with certain amplitude phase difference can obviously improve the problems that the duty cycle regulation space of some converter is lost and the problems caused by thereof when no-load or light-load. The control method of the invention has reasonable design, realizes the purposes of voltage-sharing and current-sharing under full load condition and is a control method with good stability and high reliability.

Description

technical field [0001] The invention relates to a control method for input voltage equalization of an input series output parallel combined converter, in particular to a control method for input voltage equalization of the converter within the full load range, which belongs to the field of DC voltage conversion. Background technique [0002] With the development of modern power electronics technology and the birth of high-frequency switching devices, switching power supplies are developing in the direction of high frequency, integration and modularization. As one of the series-parallel technologies of standard modules, the combination converter of input series output parallel (hereinafter referred to as ISOP) has the advantages of short development cycle and low system cost brought by standard modularization, and has become a research hotspot in recent years. It is suitable for occasions with high input voltage and high output power in industrial production and power system ...

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Application Information

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IPC IPC(8): H02M7/48H02M7/483H02M3/335
Inventor 陈乾宏金吉颜红
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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