Optimal trajectory based start-up control of LCC resonant converter for X-ray generator applications

Zhang, Shanlu; Li, Lei; Zhao, Zhennan; Fan, Shengfang; Wang, Cheng

doi:10.1016/j.egyr.2022.02.266

Cited by 3 publications

(1 citation statement)

References 10 publications

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“…where, the base values of the circuit parament are listed in Table 1. By normalizing all voltages with the voltage factor V in and all currents with the current factor V in /Z 0 , the following expressions can be derived as [20]:…”

Section: Analysis Of State Trajectory-based Startup For Lcc Convertermentioning

confidence: 99%

Digital Implementation of LCC Resonant Converters for X-ray Generator with Optimal Trajectory Startup Control

Zhao

Zhang

et al. 2022

WEVJ

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High voltage LCC resonant converters have been widely used in X-ray imaging systems in automobile nondestructive testing (NDT) applications. Low ripple voltage waveforms with fast-rising time under no-overshoot response are required for safety in such applications. The optimal state trajectory control (OTC) based on the state plane model is one of the most effective control methods to optimize transient response. Dynamic variations of the resonant voltages/currents are described as corresponding trajectories on the state plane. The transient relations can be determined by evaluating the geometric relationships of the trajectories. However, the LCC resonant converter has more state variables, resulting in more complex calculations that make the state trajectory control challenging. Furthermore, the startup duration is the most demanding process of the state trajectory control. In this paper, a digital implementation based on a hybrid controller built in a field-programmable gate array (FPGA) is proposed for LCC resonant converters with optimal trajectory startup control. A coordinated linear compensator is employed to control the switching frequency during steady-state conditions, hence eliminating the steady-state error. The experimental results were conducted on a 140-kV/42-kW LCC resonant converter for an X-ray generator. It achieves a short rising time of output voltage with no additional current or voltage stress in the resonant tank during startup compared to the conventional digital implementation control.

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Section: Analysis Of State Trajectory-based Startup For Lcc Convertermentioning

confidence: 99%

Digital Implementation of LCC Resonant Converters for X-ray Generator with Optimal Trajectory Startup Control

Zhao

Zhang

et al. 2022

WEVJ

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VFC-FFC Hybrid Control For Full-bridge LCC Resonant Converters Based on Single-Carrier Modulation

Wang

Zhang

et al. 2022

2022 IEEE 17th Conference on Industrial Electronics and Applications (ICIEA)

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A Novel Approach for Improving the LCC Resonant Converter Efficiency Over Wide Load Variation Ranges

Shahsevani

Beiranvand

2023

2023 14th Power Electronics, Drive Systems, and Technologies Conference (PEDSTC)

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Optimal trajectory based start-up control of LCC resonant converter for X-ray generator applications

Cited by 3 publications

References 10 publications

Digital Implementation of LCC Resonant Converters for X-ray Generator with Optimal Trajectory Startup Control

Digital Implementation of LCC Resonant Converters for X-ray Generator with Optimal Trajectory Startup Control

VFC-FFC Hybrid Control For Full-bridge LCC Resonant Converters Based on Single-Carrier Modulation

A Novel Approach for Improving the LCC Resonant Converter Efficiency Over Wide Load Variation Ranges

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