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Wireless voltage feedforward control system and method applicable to input-series/output-parallel system

A voltage feedforward, control system technology, applied in the direction of converting DC power input to DC power output, control/regulation system, output power conversion device, etc., can solve the problems of complex control and poor reliability of input series/output parallel system , to reduce complexity, reduce current stress, and avoid communication connections

Inactive Publication Date: 2017-06-20
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a new input series / output parallel wireless voltage feedforward control system and method for the existing input series / output parallel system with complex control and poor reliability.

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  • Wireless voltage feedforward control system and method applicable to input-series/output-parallel system

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Embodiment Construction

[0023] Such asfigure 1 As shown, the present invention provides a wireless voltage feedforward control system suitable for an input series / output parallel system, the input series / output parallel system includes N converters, and N is a positive integer greater than or equal to 2; The input ends of the N converters are connected in series and the output ends are connected in parallel. The wireless voltage feedforward control system includes N control branches, and each control branch matches a converter; each control branch includes an adder, a current sampling unit, a comparator, a driver, two proportional amplifiers and two transfer unit. The input terminal of the first proportional amplifier is connected with the input terminal of the converter, the output terminal of the first proportional amplifier is connected with one input terminal of the adder, and the other input terminal of the adder inputs the reference level V ref , the output of the adder is connected to the pos...

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Abstract

The invention discloses a wireless voltage feedforward control system and method applicable to an input-series / output-parallel system. The wireless voltage feedforward control system comprises N control branches, wherein each control branch is matched with a converter and comprises a summator, a current sampling unit, a comparator, a driver, two proportional amplifiers and two transfer units, an input voltage signal, an output voltage signal and a current signal are processed to generate a sinusoidal pulse width modulation (SPWM) control signal, a power switch device of the converter is driven to achieve wireless voltage feedforward control of the input-series / output-parallel system, and the stable running of the input-series / output-parallel system is ensured. By the wireless voltage feedforward control system, a power converter can work in an occasion with a higher input voltage, the voltage stress and the current stress of the power device in the converter are reduced, communication connection among converters is prevented, the system reliability is improved, and the design complexity is reduced.

Description

technical field [0001] The present invention relates to the technical field of power electronics, in particular to a control system and method for input series / output parallel connection of isolated and non-isolated DC-DC converters. Background technique [0002] A DC-DC converter is a power conversion device that converts DC power into an effective output fixed voltage. According to whether the input and output terminals of the converter are electrically isolated, it can be divided into non-isolated DC-DC converters and isolated DC-DC converters. DC converters are widely used in various fields. [0003] With the development of modern industry and the increase of electrical equipment, the requirements for the reliability of the power supply are getting higher and higher. A single power supply cannot meet the occasions of inputting high voltage and high power due to the limitation of the voltage and current stress of the power switching device. Multiple converters need to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00
CPCH02M3/00H02M1/0016H02M1/0074H02M1/0083
Inventor 石健将刘鑫郑祥杰
Owner ZHEJIANG UNIV
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