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State machine controller-based Boost DC-DC converter load estimation method

A state machine and converter technology, which is used in control/regulation systems, output power conversion devices, DC power input to DC power output, etc., can solve the problems of inability to improve robustness and long adjustment time.

Inactive Publication Date: 2019-08-02
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The boundary control method can achieve a better dynamic response when the load is known, but if the load disturbance is large, it consumes a long adjustment time
The system cannot achieve good robustness over a large load range

Method used

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  • State machine controller-based Boost DC-DC converter load estimation method
  • State machine controller-based Boost DC-DC converter load estimation method
  • State machine controller-based Boost DC-DC converter load estimation method

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Embodiment Construction

[0128] 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.

[0129] 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 state machine controller-based Boost DC-DC converter load estimation method. The method comprises steps: 1, a differential equation is established under a different circuit structure according to a control variable selected by a Boost converter, and a phase plane relative to the control variable is established; and a second-order sliding mode control-based finite state machine controller is established for the Boost converter, and in a condition without output overshoot, second-order sliding mode control-based finite state machine controller convergence conditions areacquired; 2, according to the workflow of the state machine and the working characteristics of the Boost circuit, the estimation formula and the estimation program workflow of a load when a left halfplane of the phase plane works is derived and obtained; and 3, according to the workflow of the state machine and the working characteristics of the Boost circuit, the estimation formula and the estimation program workflow of the load when a right half plane of the phase plane works is derived and obtained.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a load estimation method of a Boost DC-DC converter based on a state machine controller. Background technique [0002] Pulse width modulation (PWM) control is widely used in direct current - direct current (DC-DC) converters. It obtains the output switching signal according to the output voltage and other state variables, and controls the DC-DC converter to track the reference voltage. This method requires the use of an integral term of the output error to ensure zero error at steady state. Its main advantage is that it enables the converter to operate at a constant switching frequency, making it very good electromagnetic compatibility (EMI). However, it also has some disadvantages: [0003] 1) The integral term may slow down the dynamic response of the converter; [0004] 2) It is a control method based on small signals, and the dynamic performance of the converter can only ...

Claims

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Application Information

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IPC IPC(8): H02M3/158
CPCH02M3/158
Inventor 凌睿邓策亮
Owner CHONGQING UNIV
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