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High-frequency-link power-conversion system having direct double-frequency ripple current control and method of use

Title: High-frequency-link power-conversion system having direct double-frequency ripple current control and method of use.
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Name(s): Li, Hui, inventor
Liu, Xiaohu, inventor
Type of Resource: text
Genre: Utility
Text
Date Created: 2013-09-05
Date Issued: 2014-04-29
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: A direct double-frequency ripple current control in a two-stage high-frequency-link (HFL) based fuel cell converter that can achieve low-frequency ripple free input current without using large electrolytic capacitors is provided. To eliminate the double-frequency ripple current disturbance introduced by the single-phase inverter load, a proportional-resonant (PR) controller is developed to achieve an extra high control gain at designed resonant frequency. This high gain can be viewed as the virtual high impedance for blocking the double-frequency ripple energy propagation from inverter load to fuel cell stack. More particularly, the proposed control system can realize the utilization of all capacitive ripple energy sources in the system by regulating all the capacitors to have large voltage swing and the voltage swing is synchronized to keep real-time balancing of the transformer primary-side and secondary-side voltages. As a result, the zero-voltage-switching (ZVS) operation for all switching devices in the dc-dc stage can be guaranteed.
Identifier: FSU_uspto_8711585 (IID), 8711585 (patent number), 1616461 (inventor key), 14/018988 (app id), 6c9256d97d167832cbab694dc904bd27 (assignee id)
Cited by US patents: 1
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_uspto_8711585
Use and Reproduction: Copyright not evaluated
Owner Institution: FSU

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High-frequency-link power-conversion system having direct double-frequency ripple current control and method of use. (2014). High-frequency-link power-conversion system having direct double-frequency ripple current control and method of use. Retrieved from http://purl.flvc.org/fsu/fd/FSU_uspto_8711585