Temperature characteristic compensation method and circuit of control system

Abstract

The invention discloses a temperature characteristic compensating method and a temperature characteristic compensating circuit for a control system, wherein a thermistor is arranged in a corresponding position of a control circuit, and automatic adjustment of the control system along with ambient temperature variation is realized by utilization of the characteristic that the resistance of the thermistor is changed along with temperature variation, namely the control system can be subjected to parameter adjustment and can be also subjected to simple structural switching. The temperature characteristic compensating method and the temperature characteristic compensating circuit for the control system can make the control system have certain self-adaptive adjusting ability on temperature variation of an application environment, and improve the system performance.

Description

technical field [0001] The invention relates to a control technology of an analog control system, in particular to a compensation technology for temperature characteristics of a control system of an analog control system. Background technique [0002] With the development of electronics, information and computer technologies, some circuits with control feedback systems, such as AC-DC (AC / DC) converters, DC-DC (DC / DC) converters (hereinafter referred to as converters) are used in the application field It is becoming more and more extensive, and the performance requirements for the converter are getting higher and higher. [0003] AC / DC converters and DC-DC converters can be collectively referred to as switching power supplies. It is a power supply that uses modern power electronics technology to control the time ratio of switching transistors on and off to maintain a stable output voltage. Switching power supplies are generally determined by pulse width Modulation (PWM, Puls...

AI Technical Summary

Problems solved by technology

[0012] However, in practical applications, the environmental conditions of the converter (mainly temperature, but also humidity, air pressure, etc.), input and output conditions (input voltage, load current, load capacitance, etc.) generally vary widely.

However, PID control does not have the ability to adapt to the changes in the above-mentioned application conditions. It is difficult to fully realize the high performance of the control system under a wide range of application conditions, and sometimes it is even impossible to achieve system stability in the entire range.

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