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System and method for controlling Buck converter based on phase path planning and tracking

A converter control and trajectory planning technology, used in control/regulation systems, output power conversion devices, DC power input conversion to DC power output, etc. Effect

Active Publication Date: 2017-08-01
重庆华创智能科技研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Numerous studies have focused on switching surface configurations but few have precisely controlled phase trajectories

Method used

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  • System and method for controlling Buck converter based on phase path planning and tracking
  • System and method for controlling Buck converter based on phase path planning and tracking
  • System and method for controlling Buck converter based on phase path planning and tracking

Examples

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Embodiment

[0059] This embodiment is based on the Buck converter control system of phase trajectory planning and tracking, such as figure 1 As shown, the Buck circuit in the Buck converter includes a power supply, a switch tube, a diode, an inductor, a capacitor, and an output resistor. The power supply, switch tube, inductor, and capacitor are sequentially connected in series to form a loop, and the output resistors are connected in parallel at both ends of the capacitor. A reverse diode is connected between the low-level end of the switching tube and the negative pole of the power supply, and the switching element in the Buck converter is PWM-controlled by a controller, and the controller is provided with a load identifier, a trajectory planner, a supervisor, Trajectory predictive controllers, PI controllers, selectors and digital pulse width regulators;

[0060] The load identifier is used to detect the load parameters of the Buck converter; the load at the output end of the Buck conv...

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PUM

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Abstract

The invention belongs to the field of power and electron technology, and provides a system and a method for controlling a Buck converter based on phase path planning and tracking. PWM control is carried out on a switch element in the Buck converter by a controller, and the controller is internally provided with a load recognizer, a path planning device, a supervising device, a path prediction controller, a PI controller, a selector and a digital pulse-width regulator; the load recognizer is used for detecting the load parameter of the Buck converter; the path planning device is used for establishing a state model and planning a phase path of the Buck converter; the path prediction controller is used for detecting an inductive current value, and comparing with a prediction planning inductive current value to realize tracking control for dynamic paths; the supervising device is used for outputting a control strategy switching signal; the PI controller is used for realizing steady tracking; the selector is used for selecting a control strategy; and the digital pulse-width regulator is used for driving the switch element in the Buck converter to realize the PWM control. According to the system and the method, quick response for the Buck converter and accurater control for the Buck converter are realized.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a Buck converter control system and method based on phase trajectory planning and tracking. Background technique [0002] There are complex nonlinear behaviors in power electronic systems. The research on these behaviors leads to various nonlinear control methods and improves the characteristics of the system. In the application field, the response time of the system is a very important characteristic for the power electronic system, and many nonlinear control methods have been used to realize the fast response of the system start-up process and load switching process. Theoretically speaking, optimal control theory is applied to power electronic systems to generate optimal switching sequences that control fast response processes, that is to say minimum time response processes. In the simplest form, the optimal time control strategy realizes dynamic adjustme...

Claims

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Application Information

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IPC IPC(8): H02M3/157
CPCH02M3/157
Inventor 唐春森王智慧孙跃苏玉刚戴欣叶兆虹朱婉婷顾振博谭若兮
Owner 重庆华创智能科技研究院有限公司
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