A Design Method of Multiphase DCDC Robust Controller

Abstract

The invention relates to a multiphase DCDC controller design method. The method is based on a generalized multiphase DCDC boost converter model, adopts each group of independent control methods, and comprehensively analyzes the parameter uncertainty of the linear model, system disturbance input and secondary Nonlinear, a robust control model for multiphase boost converters is established. This model is suitable for various circuit topologies such as single-phase boost, typical magnetically integrated multi-phase boost, coupled inductor multi-phase boost, etc., and fully considers parameter uncertainty, disturbance input, and quadratic nonlinearity, and has high applicability. Good robust stability and robust performance. The robust controller designed by this method has the characteristics of good stability, insensitivity to bounded uncertainty and interference, and realizes the system stability and transient performance requirements of the high-power multi-phase DCDC converter under the wide working range, and solves the problem of The problem of multi-phase interleaved DCDC controller design is solved.

Description

technical field [0001] The invention relates to a design method of a multiphase DCDC controller, which can be used in the field of power electronic equipment. Background technique [0002] The multi-phase DC-DC converter adopts a multi-phase parallel topology and uses multiple groups of devices to achieve the design goal. While breaking through the power limit of a single device, it also effectively reduces the demand for capacitance and inductance, thereby improving power density. . In addition, lower output ripple, more controllable objects and design margins improve the control flexibility and working reliability of the DC converter. [0003] Although the multi-phase DC-DC converter has the characteristics of high power, high power density, flexible control and high reliability, its structure is complex and there are many devices, and due to the problems of circuit stray parameters and phase asymmetry, it is difficult to accurately model very difficult. Moreover, the p...

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Problems solved by technology

[0003] Although the multi-phase DC-DC converter has the characteristics of high power, high power density, flexible control and high reliability, its structure is complex and there are many devices, and due to the problems of circuit stray parameters and phase asymmetry, it is difficult to accurately model very difficult

Moreover, the parameter uncertainty and quadratic nonlinearity of the multiphase DC-DC converter affect the stability and reliability of the control. Commonly used control methods such as PID control, sliding mode control, and pole configuration cannot effectively deal with the variable parameters of the system. deterministic, and in the design, for the convenience of processing, the quadratic nonlinearity is often ignored

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