A method for suppressing the transformer bias magnetic field of a guide rail vehicle phase-shifting full-bridge charger

A phase-shifting full-bridge and transformer technology, which is applied in the field of guide rail vehicles, can solve problems affecting control performance and high-frequency transformer bias, and achieve the effects of suppressing bias, improving system stability, and improving dynamic performance and steady-state performance

Active Publication Date: 2021-02-02
XIAN YONGDIAN ELECTRIC
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Problems solved by technology

However, the high-frequency transformer in the phase-shifted full-bridge main circuit often has magnetic bias due to load and main circuit parameter asymmetry, which affects the control performance.

Method used

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  • A method for suppressing the transformer bias magnetic field of a guide rail vehicle phase-shifting full-bridge charger
  • A method for suppressing the transformer bias magnetic field of a guide rail vehicle phase-shifting full-bridge charger
  • A method for suppressing the transformer bias magnetic field of a guide rail vehicle phase-shifting full-bridge charger

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Embodiment Construction

[0024] The transformer bias suppression control method of the guide rail car phase-shifting full-bridge charger of the present invention adopts a voltage and current double closed-loop control strategy. In the case of voltage control, the outer loop is the voltage loop, and the inner loop is the bias correction loop; the voltage outer loop and the current outer loop sample the output voltage and current, and then enter the PI regulator for adjustment; the bias correction inner loop samples the primary current of the transformer , after variable damping adjustment, then PI adjustment. Such as figure 2 and Figure 4 , the control method of the present invention specifically comprises the following steps:

[0025] 1) First, the maximum value and minimum value of the primary side current of the transformer are sampled, and the forward maximum value I of the primary side current of the transformer is collected at the moment when the leading bridge T1 is turned off TMAX , collec...

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Abstract

The invention discloses a transformer bias suppression control method for a phase-shifting full-bridge charger of a guide rail car: on the basis of the conventional phase-shifting full-bridge voltage and current loop control, a transformer bias correction link is added, and the primary side current of the transformer is used as the bias current. Magnetic correction loop feedback. By using the transformer bias correction control loop control of the present invention, the phase shift angles of T1 and T4 phase shift angles and T2 and T3 phase shift angles are not completely symmetrical, but according to the maximum value of the forward current of the primary side of the transformer and the reverse The maximum current is adjusted separately. While suppressing the transformer bias, it also improves the rapidity and robustness of the control system. And passed the practical application verification, the control method has broad industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of guide rail cars, and relates to a method for suppressing magnetic bias, in particular to a method for suppressing magnetic bias of a transformer of a phase-shifting full-bridge charger for a guide rail car. Background technique [0002] With the great-leap-forward development of China's railway technology, as well as the enhancement of China's comprehensive national strength and the improvement of people's living standards, the requirements for the environment and comfort are getting higher and higher. The advantages of large passenger volume, flexibility and convenience have become the research object of many OEMs. The whole vehicle design of light rail vehicles tends to adopt the design principles of light weight and miniaturization more and more, and the requirements for the DC power supply unit of guide rail vehicles are also the same, so the performance index of the DC power supply of the train, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335
CPCH02M3/33569H02M1/0038
Inventor 李东李岩王喜乐葸代琪张宇龙余华张涛高永军
Owner XIAN YONGDIAN ELECTRIC
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