Control method for improving dynamic performance of high-power direct-current electronic load

Abstract

The invention discloses a control method for improving the dynamic performance of a high-power direct-current electronic load, the direct-current electronic load comprises a PWM (Pulse Width Modulation) rectifying circuit and a BUCK circuit, and the BUCK circuit is connected in parallel with the output end of the PWM rectifying circuit; interrupting points A, C, E and G are respectively arranged at adjacent vertexes of carriers, and updating points B, D, F, H and J are respectively arranged at adjacent carrier bottom points starting from a first carrier bottom point after the interrupting point A; before the moment of the interruption point A, the control mode is output current PI control, after the moment of the interruption point A, the control mode is switched into inductive current prediction control, the direct current electronic load adjusts the load current from 0 ampere to the instruction current, and after the load current reaches the instruction current and is stabilized for a plurality of cycles, the control mode is switched back from the inductive current prediction control to the output current PI control; the direct-current electronic load has the advantages that high load current dynamic performance can be obtained, and therefore the application field of the direct-current electronic load can be expanded.

Description

technical field [0001] The invention relates to the field of testing equipment, and more particularly to a control method for improving the dynamic performance of a high-power direct current electronic load. Background technique [0002] The DC electronic load is essentially a power electronic device that can realize the closed-loop control of DC current. Compared with traditional energy-consuming loads such as resistance, the DC electronic load has flexible applications such as constant current, constant resistance, and constant power. The energy is fed back to the power grid, saving energy and protecting the environment. There are more and more important application requirements in applications such as battery pack charging and discharging equipment, semiconductor device test systems, fuel cell characteristic load simulation, and photovoltaic array simulation power supplies. [0003] High dynamic performance and high steady-state accuracy are the core indicators of DC ele...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the control method of the prior art DC electronic load cannot obtain high load current dynamic performance, thus it is difficult to expand the application field of the DC electronic load

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