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Method and device for controlling flux linkage of high frequency transformer

A high-frequency transformer and flux linkage technology, applied in the field of high-frequency transformers, can solve the problems of cumbersome flux linkage control of high-frequency transformers.

Active Publication Date: 2021-01-22
CSR ZHUZHOU ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Based on the shortcomings of the above-mentioned prior art, the present invention provides a method and device for controlling the flux linkage of a high-frequency transformer to solve the problem of controlling the flux linkage of a high-frequency transformer by adding an auxiliary magnetic core to the high-frequency transformer too complicated question

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  • Method and device for controlling flux linkage of high frequency transformer
  • Method and device for controlling flux linkage of high frequency transformer
  • Method and device for controlling flux linkage of high frequency transformer

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specific Embodiment approach

[0066] Optionally, in another embodiment of the present invention, in step S102, according to the phase shift angle of the current control cycle and the phase shift angle of the next control cycle, a specific implementation manner of calculating the transient compensation duty ratio includes:

[0067] The phase shift angle of the current control cycle and the phase shift angle of the next control cycle are calculated through the transient flux linkage offset compensation algorithm to obtain the duty cycle of the transient compensation.

[0068] Specifically, the transient compensation duty cycle is:

[0069]

[0070] in, is the phase shift angle of the current control cycle; is the phase shift angle of the next control cycle.

Embodiment approach

[0071] Optionally, in another embodiment of the present invention, in step S102, according to the average excitation current and the reference value of the excitation current in the current control cycle, an implementation manner of calculating the steady-state compensation duty cycle is specifically:

[0072] The steady-state compensation duty cycle is calculated by using the average excitation current and the reference value of the excitation current through a nonlinear flux controller.

[0073] It should be noted that the nonlinear flux linkage controller mentioned in the embodiments of the present invention refers to a nonlinear controller for controlling flux linkage, which can be understood as a nonlinear PI controller. The nonlinear controller has the characteristics of fast response and insensitivity to the sampled grassland.

[0074] Specifically, the steady-state compensation duty ratio calculated by using the average excitation current and the reference value of the...

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Abstract

The present application provides a method for controlling the flux linkage of a high-frequency transformer, including: obtaining the phase shift angle and the average excitation current of the power electronic converter in the current control cycle, and the reference value and lower value of the excitation current of the power electronic converter The phase shift angle of a control cycle; according to the phase shift angle of the current control cycle and the phase shift angle of the next control cycle, calculate the transient compensation duty cycle, and the average excitation current according to the current control cycle and the excitation current reference value, calculate the steady-state compensation duty ratio; calculate the duty ratio of the next control cycle according to the transient compensation duty ratio and the steady-state compensation duty ratio; The phase shift angle and duty ratio of the next control cycle are input to the PWM generator, and the flux linkage of the high-frequency transformer of the power electronic converter is controlled in the next control cycle. Therefore, a simple and reliable method for controlling the flux linkage of the high-frequency transformer of the power electronic converter is realized.

Description

technical field [0001] The invention relates to the technical field of high-frequency transformers, in particular to a method and device for controlling flux linkage of high-frequency transformers. Background technique [0002] High-frequency transformers are the core components in power electronic converters. High-permeability cores in high-frequency transformers are sensitive to DC bias excitation and are prone to bias saturation. When the bias magnetic saturation occurs, it is easy to cause the high-frequency transformer to be burned out. Therefore, the control of the flux linkage of the high-frequency transformer is particularly important. [0003] When controlling the flux linkage of the high-frequency transformer of the power electronic converter, it is necessary to control the flux linkage of the power high-frequency transformer in the transient state and steady state process, so as to effectively ensure that the high-frequency transformer will not enter a saturated...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/42H02M1/00
CPCH01F27/42H02M1/00H02M1/0003
Inventor 要鹏飞蒋晓华王韬孙大南龙谷宗胡贵薛芃张乐
Owner CSR ZHUZHOU ELECTRIC CO LTD
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