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Control method for improving dynamic response of switch power

專利號
US10097077B2
公開日期
2018-10-09
申請人
SOUTHEAST UNIVERSITY（CN Nanjing）
發(fā)明人
Shen Xu; Chong Wang; Xianjun Fan; Weifeng Sun; Shengli Lu; Longxing Shi
IPC分類
G05F1/70; G05F1/00; A61B17/32; B41J2/00; H02M3/158; H02M1/08; G05B19/042; H02M1/00
技術(shù)領(lǐng)域
mode,module,voltage,pid,load,lth,vo,dynamic,htl,output
地域： Nanjing

摘要

A control method for improving dynamic response of switch power is based on a closed-loop control system comprising a sampling module, a dynamic control module, an error calculation module, a PID module, a mode control module, and a PWM module. The sampling module samples an output voltage Vo, and the dynamic control module compares the output voltage Vo with a set maximum voltage Vomax, a set minimum voltage Vomin, and a reference voltage Vref, so as to determine whether to adopt a dynamic mode. In the dynamic mode, when the output voltage Vo changes greatly, the output voltage Vo is rapidly restored to a stable voltage by inputting large power or small power.

說明書

4. The present invention can improve the flexibility of the circuit design. Due to the relationship between the slope and the mode time of the heavy-to-light load mode and the light-to-heavy load mode, the mode time can replace the function of the voltage slope; both the voltage slope and the mode time can be applied in analog design and digital design, making the application control be wider and improving the dynamic response of the circuit.
5. The present invention can be applied to various switch power circuit structures, and has universality, reusability and portability.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1a is a structure block diagram of a system of a control method according to the present invention;

FIG. 1b is a structure block diagram of a voltage monitoring module in FIG. 1a; and

FIG. 1c is a structure block diagram of a slope calculation module in FIG. 1a;

FIG. 2 is an application diagram of a heavy-to-light load HLT mode;

FIG. 3 is an application diagram of a light-to-heavy load LTH mode;

FIG. 4a is a structure drawing embodiment of a closed-loop circuit having a multi-mode control flyback converter according to the present invention;

FIG. 4b is a relationship between a switch frequency and a load current when a flyback system is working in a normal working mode under a steady-state;

權(quán)利要求

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