Electric power converter control circuit capable of achieving self-regulation of parameter of controller

Abstract

The invention provides an electric power converter control circuit capable of achieving self-regulation of a parameter of a controller. The circuit comprises an electric power converter main circuit, and also comprises an actual inductor energy detection circuit WL, an actual capacitor energy detection circuit WC, an output detection circuit WR, an actual energy analysis circuit W, an inductor expected energy computing circuit EL, a capacitor expected energy computing circuit EC, an output expected energy computing circuit ER, an expected energy analysis circuit E, an energy analysis circuit V, an adjustable PI controller circuit K, a driving signal generation circuit P and a difference computing circuit F. The invention provides the control circuit which regulates the PI parameter of the controller based on energy stored in the inductor and the capacitor in the electric power converter and the difference between the actual output energy of the electric power converter and the corresponding expected energy, and defects of the existing PI controllers can be solved under the premise of effectively controlling the electric power converter.

Description

technical field [0001] The invention relates to a control circuit of a power converter. Background technique [0002] In the controller design of the power converter, the PI controller is widely used because of its advantages of high reliability, good robustness, simple and effective algorithm, etc. However, the PI controller with fixed parameters has poor adaptability under different working conditions, and it is difficult to ensure that the expected control requirements are met during the dynamic adjustment process such as overshoot and oscillation, especially when the load changes, such problems are more prominent , resulting in poor output power quality. Although the existing PI parameter self-tuning control technology can effectively improve the control effect of the PI controller, there is a problem of complex algorithm, which needs to be further solved. Contents of the invention [0003] The object of the present invention is to provide a power converter control c...

AI Technical Summary

Problems solved by technology

However, the PI controller with fixed parameters has poor adaptability under different working conditions, and it is difficult to ensure that the expected control requirements are met during the dynamic adjustment process such as overshoot and oscillation, especially when the load changes, such problems are more prominent , resulting in poor output power quality

Although the existing PI parameter self-tuning control technology can effectively improve the control effect of the PI controller, there is a problem of complex algorithm, which needs to be further solved

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