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Decoupling control method for output voltage and flying capacitor voltage of double closed-loop control system of three-level DC-DC converter

A double-closed-loop control and flying-capacitor technology is applied in control/regulation systems, DC power input to DC power output, output power conversion devices, etc., to achieve strong anti-disturbance, fast dynamic response speed, and no trouble in the start-up process. The effect of overshoot

Inactive Publication Date: 2017-09-15
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are some effective control methods in the prior art, the method of using the sliding mode technology to control the output voltage while using the self-tuning fuzzy PID technology to control the decoupling and balancing of the flying capacitor voltage is still blank, which is urgently needed in this field. Technicians solve corresponding technical problems

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  • Decoupling control method for output voltage and flying capacitor voltage of double closed-loop control system of three-level DC-DC converter
  • Decoupling control method for output voltage and flying capacitor voltage of double closed-loop control system of three-level DC-DC converter
  • Decoupling control method for output voltage and flying capacitor voltage of double closed-loop control system of three-level DC-DC converter

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Embodiment Construction

[0053] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0054] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The invention provides a decoupling control method for an output voltage and a flying capacitor voltage of a double closed-loop control system of a three-level DC-DC converter. The method comprises a first step of modeling for a double closed-loop control system of a three-level DC-DC buck converter; a second step of controlling an output voltage according to a slide mode control theory; and a third step of performing decoupling control on the flying capacitor voltage according to self-tuning fuzzy PID control.

Description

technical field [0001] The invention relates to the field of automation control, in particular to a decoupling control method for the output voltage and the flying capacitor voltage of a double closed-loop control system of a three-level DC-DC buck converter. Background technique [0002] In the power conversion occasions of high input / output voltage, it is often difficult to select a power switching device with a suitable withstand voltage value. The multi-level converter uses flying capacitors to share the input voltage equally among the switches in series, which can not only reduce the voltage stress of the switch tubes and reduce the volume of the output filter, but also improve the dynamic characteristics, so the input / output voltage Higher medium and high power conversion occasions have broad application prospects. However, there is a coupling relationship between the output voltage of the multilevel converter and the voltage of each flying capacitor, which is a stron...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/158
CPCH02M3/158
Inventor 凌睿张腾胡睿王峰刘金平刘辉杨常浩
Owner CHONGQING UNIV