DC-DC converter sliding mode controller and method based on power constant-speed reaching law

A kind of DC-DC, control method technology, applied in the field of DC-DC converter sliding mode controller of fast reaching law

Active Publication Date: 2020-01-10
SHANGHAI MARITIME UNIVERSITY
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AI Technical Summary

Problems solved by technology

The sliding mode controller and the method aim to solve the serious problem of chattering phenomenon in the output of the sliding film variable structure control in the DC-DC converter, realize the composite control of the sliding film variable structure under the action of time-varying disturbance, and improve the control of the sliding film variable structure Accuracy and Noise Immunity

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  • DC-DC converter sliding mode controller and method based on power constant-speed reaching law
  • DC-DC converter sliding mode controller and method based on power constant-speed reaching law
  • DC-DC converter sliding mode controller and method based on power constant-speed reaching law

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Embodiment Construction

[0083] The present invention will be further described below through specific embodiments in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present invention, and are not intended to limit the protection scope of the present invention.

[0084] The present invention is a direct-current (DC-DC) converter sliding mode controller based on power constant velocity reaching law, such as figure 1 As shown, the sliding mode controller is set in the step-down converter (BUCK converter), and is respectively connected with the power supply 1, the inductance / current collector 2 and the switching device 3, and the sliding mode controller includes a model building block 4, a calculation module, detection module 5 and control module 6; the first input terminal of the model building module 4 is connected to the power supply 1, and the second input terminal is connected to the inductance / current collector 2, and receives the voltage information and...

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Abstract

The invention discloses a DC-DC converter sliding mode controller based on a power constant-speed reaching law. The sliding mode controller is arranged in a BUCK converter, and is connected with a power supply, an inductive current collector and a switching device. The DC-DC converter sliding mode controller comprises a model construction module, of which the first input end is connected with thepower supply and the second input end is connected with the inductive current collector; a calculation module, of which the first input end is connected with the output end of the model construction module; a detection module, of which the input end is connected with the output end of the calculation module, and the first output end is connected with the second input end of the calculation module;and a control module, of which the input end is connected with the second output end of the detection module, and the output end is connected with the switching device. According to the method, the problem of serious buffeting phenomenon of output control of a sliding mode variable structure in a DC-DC converter is solved, composite control of the sliding mode variable structure under the actionof time-varying disturbance is realized, and the control precision and the anti-interference performance of the sliding mode variable structure are improved.

Description

technical field [0001] The invention relates to the technical field of step-down converters, in particular to a sliding mode controller and method for a DC-DC converter based on a power constant velocity reaching law. Background technique [0002] DC-type step-down converter is a power electronic device that can reduce the input fixed DC voltage to another DC adjustable voltage, and is widely used in medical, aerospace, communication, computer and other industries. [0003] Sliding mode variable structure control has fast response speed and superior dynamic performance, and is insensitive to parameter changes and disturbances. The research on its control strategy has achieved rich results, and the quantitative mathematics of converter output deviation and boundary layer in steady state has been established. The relationship and the selection basis of sliding mode coefficient and boundary layer thickness are given, which improves the robustness of the system. [0004] For th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/00
CPCH02M3/00
Inventor 周瑞平李军军刘冲唐代卫
Owner SHANGHAI MARITIME UNIVERSITY
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