Voltage regulation of the Y-source boost DC-DC converter considering effects of leakage inductances based on cascaded sliding-mode control

作者：Ahmadzadeh Soheil; Markadeh Gholamreza Arab^*; Blaabjerg Frede

来源：IET Power Electronics, 2017, 10(11): 1333-1343.

DOI：10.1049/iet-pel.2016.0767

• DC-DC power convertors
• magnetic leakage
• inductance
• variable structure systems
• voltage control
• stability
• Y-source boost DC-DC converter
• leakage inductance effects
• cascaded sliding-mode control
• high step-up DC-DC converter
• coupled inductors
• Y-source impedance network
• diode function
• diode conduction
• switch conduction
• variable structure control approach
• CSMC robustness
• CSMC stability
• output voltage regulation

In this study, a sliding mode-based controller is designed for regulating the output voltage of a high step-up DC-DC converter with three coupled inductors called Y-source impedance network. As Y-source converter can provide a very high boost at a lower shoot-through duty cycle of the switch and it has one more degree of freedom to achieve voltage boost. In order to accurately analyse the converter operation, the leakage inductance impact on diodes function in addition to other parasitic elements has been modelled. Hence, four different time intervals corresponding to switch and diode conduction have been considered. Also, an exposition of a variable structure control approach is mentioned. The method employs cascaded sliding-mode control (CSMC) to output voltage regulation of the converter. The stability and robustness of the CSMC against the variation of reference voltages and the uncertainties of the load demands have been explained. Simulation and experimental results confirm the capability and effectiveness of the proposed control method.

• 出版日期2017-9-9