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A DC step-down power supply based on energy control

A DC voltage reduction and energy control technology, applied in control/regulation systems, DC power input conversion to DC power output, electrical components, etc., can solve problems such as overshoot and long adjustment process, and achieve strong adaptability and excellent dynamic performance. performance, the effect of excellent steady-state operating performance

Active Publication Date: 2020-12-29
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For the control problem of DC power supply, traditional control methods such as double closed-loop PI control strategy, because the design of PI parameters is based on the frequency characteristics of the system, can achieve better control effects for a certain frequency range or circuit load conditions, but when the system frequency When there is a change, the steady-state operating point changes sharply or fluctuates in a large range, there is often an overshoot or a long adjustment process in the starting process and dynamic process of the system, and the control parameters need to be readjusted

Method used

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  • A DC step-down power supply based on energy control
  • A DC step-down power supply based on energy control
  • A DC step-down power supply based on energy control

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Embodiment Construction

[0024] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] The present invention takes a typical BUCK DC converter as an example for specific description and analysis.

[0026] A DC power supply with excellent dynamic performance proposed by the present invention is composed of a main circuit and a control circuit.

[0027] The main circuit is composed of power electronic switching device VT, freewheeling diode VD, filter inductor L, filter capacitor C, and load R. The connection method between these devices is consistent with that of a typical BUCK circuit.

[0028]The control circuit is mainly composed of signal processing circuit 1, dynamic process logic judgment circuit 2, steady state process control circuit 3, sudden increase dynamic process control circuit 4, sudden decrease dynamic process control circuit 5, NOT gate circuit 6, AND gate circuit 7, and Gate circuit 8, OR gate circuit ...

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Abstract

The invention discloses a DC step-down power supply based on energy control. The DC step-down power supply based on energy control comprises a main circuit and a control circuit, and the main circuitis a BUCK circuit; the control circuit comprises a signal processing circuit, a dynamic process logic determination circuit, a steady-state process control circuit, a sudden-increasing dynamic processcontrol circuit, a sudden-decreasing dynamic process control circuit, a first NOT gate circuit, a first AND gate circuit, a second AND gate circuit, a first OR gate circuit, a second NOT gate circuit, a second OR gate circuit, a third OR gate circuit, a third AND gate circuit, an isolation drive circuit, an input voltage sensor, an inductive current sensor, an output voltage sensor and an outputcurrent sensor. P and I parameter design is not needed in the controller, and the problem that parameter selection of a traditional PI controller has a large influence on performances is solved. Energy is taken as a control basis, and the energy of each link of the main circuit automatically changes when the load changes, so that the controller is high in adaptive capacity.

Description

technical field [0001] The invention relates to a DC step-down power supply, in particular to a DC step-down power supply for realizing circuit control through energy calculation, and belongs to the technical field of DC power supply. Background technique [0002] For the control problem of DC power supply, traditional control methods such as double closed-loop PI control strategy, because the design of PI parameters is based on the frequency characteristics of the system, can achieve better control effects for a certain frequency range or circuit load conditions, but when the system frequency When there is a change, the steady-state operating point changes sharply or fluctuates in a large range, there is often an overshoot or a long adjustment process in the start-up process and dynamic process of the system, and the control parameters need to be re-tuned. Contents of the invention [0003] Aiming at the above-mentioned prior art, the technical problem to be solved by the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/08H02M3/156
CPCH02M1/08H02M3/156
Inventor 张强武保成王禹霖宋世豪李鸿凯李梦滢年强
Owner HARBIN ENG UNIV
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