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Charger system

A charger and voltage technology, applied in the direction of collectors, electric vehicles, electrical components, etc., can solve the problems of low efficiency of two-stage charger equipment

Active Publication Date: 2012-07-11
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The invention proposes a charger system, which solves the problem of low efficiency of the existing two-stage charger equipment, and can realize constant current charging and constant voltage charging of electric vehicles

Method used

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Embodiment Construction

[0069] Such as figure 1 As shown, the embodiment of the present invention includes a high-frequency rectifier, a high-frequency DC transformer and a controller. The high-frequency rectifier and the high-frequency DC transformer are connected through a DC bus, and the controller generates the first to sixth driving signals and sends them to the high-frequency The rectifier and the controller generate seventh and eighth driving signals and send them to the high-frequency DC transformer.

[0070] Such as figure 2 As shown, the controller of this embodiment includes a sampling conditioning module, a double closed-loop control module, a first signal generation module and a second signal generation module;

[0071] Such as image 3 As shown, the double closed-loop control module performs the following operations:

[0072] (2.1) Judging whether u 0 0 * , if yes, go to step (2.2), otherwise go to step (2.4), output voltage set value u 0 * =110V, which is the charging cut-off v...

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Abstract

The invention discloses a charger system, and belongs to power electronic and power automatic equipment. The charger system is suitable for electric automobile charging occasions, and the problem of relatively low efficiency of the conventional two-stage charger equipment is solved. The charger system comprises a high-frequency rectifier, a high-frequency direct current transformer and a controller, wherein the high-frequency rectifier is connected with the high-frequency direct current transformer through a direct current bus; and the controller generates driving signals from one to six and sends the driving signals to the high-frequency rectifier, generates seventh and eighth driving signals and sends the seventh and eighth driving signals to the high-frequency direct current transformer, and comprises a sampling and conditioning module, a double-closed-loop control module, a first signal generation module and a second signal generation module. The charger system has the characteristics of high power factor and low current harmonic of the high-frequency rectifier and the characteristics of high efficiency and electrical isolation of the high-frequency direct current transformer, so that two working modes of constant current charging and constant voltage charging for an energy storage battery and a power battery are realized; and the charger system is suitable for charging systems of electric chargers.

Description

technical field [0001] The invention belongs to power electronics and power automation equipment, and in particular relates to a charger system, which is suitable for electric vehicle charging occasions. Background technique [0002] Energy and the environment have become the most concerned issues in the world. Energy is the foundation of the economy, while the environment is an important factor restricting economic and social development. Energy saving and environmental protection promote the development of automobiles towards electric vehicles. The development and popularization of electric vehicles is inseparable from the construction of chargers (stations), and chargers in charging stations are non-linear loads that will generate harmonics, which is a kind of harm to the power grid. pollute. With the large-scale development of electric vehicles, the number of charging stations is large and widely distributed, and the corresponding demand for chargers is also increasing....

Claims

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Application Information

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IPC IPC(8): H02J7/10
Inventor 段善旭刘宝其陈昌松蔡涛方支剑
Owner HUAZHONG UNIV OF SCI & TECH
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