Output voltage control method of buck converter based on elm-pid

Abstract

The invention discloses a buck converter output voltage control method based on ELM-PID. The method comprises the following steps: establishing a state space equation; establishing an average state space equation; obtaining an alternating current small signal state equation and an output equation; solving a transfer function of a Buck converter; constructing a controller; initializing ELM network;carrying out ELM network adaptive adjustment; and setting resistive load disturbance and control end disturbance in a certain time period, adjusting PID parameters through ELM, and obtaining stable voltage output. According to the invention, firstly, a PID setting algorithm is designed according to an ELM principle; PID parameters are adjusted on line to achieve output voltage stabilization control, then two faults of control end disturbance and load end disturbance are given to prove that the ELM-PID controller can well cope with influence of loads and external disturbance, and the method has the advantages of being high in response speed and stability.

Description

technical field [0001] The invention relates to a Buck converter output voltage control method, in particular to an ELM-PID-based Buck converter output voltage control method. Background technique [0002] Buck converter is a high-frequency power conversion device, which is the core component of modern power conversion technology. Its function is to convert a specific DC or AC voltage into the DC voltage required by the user through different forms of circuit structures. Because the Buck converter is the basic component of other types of power converters, and has the characteristics of high efficiency, small size and light weight, it has been widely used in industry, transportation, communication, IT and daily life. [0003] As a DC power conversion unit, the Buck converter is widely used in the terminal load power supply interface of the power conversion system, and its performance directly determines the power supply index of the DC load. In the field of microelectronics...

AI Technical Summary

Problems solved by technology

In terms of the control of the bcuk converter at this stage, due to the difficulty in establishing an accurate model of the converter, it is difficult to obtain good control characteristics with traditional control methods, and there are problems in the application process such as large power consumption, low energy conversion efficiency, and slow output response speed And other problems, to a certain extent, restrict the wide application of Buck converter

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