scholarly journals Non‐resonant soft‐switching technique with linear current on switching cycle time‐scale for switched‐capacitor DC‐DC converters

2021 ◽  
Author(s):  
Yangbin Zeng ◽  
Hong Li ◽  
Haitao Du ◽  
Bo Zhang
Keyword(s):  
Cycle Time ◽  
Time Scale ◽  
Soft Switching ◽  
Switched Capacitor ◽  
Switching Cycle ◽  
Linear Current

Novel High Step-Up Soft-Switching DC–DC Converter Based on Switched Capacitor and Coupled Inductor

2020 ◽  
Vol 35 (9) ◽  
pp. 9471-9481 ◽  
Author(s):  
Xiangjun Zhang ◽  
Lei Sun ◽  
Yueshi Guan ◽  
Shouheng Han ◽  
Hongye Cai ◽  
...  
Keyword(s):  
Soft Switching ◽  
Switched Capacitor

scholarly journals Elementary model of internal electromagnetic pinch-type instability

2017 ◽  
Vol 816 ◽  
pp. 705-718 ◽  
Author(s):  
Jānis Priede
Keyword(s):  
Time Scale ◽  
Liquid Metals ◽  
Numerical Models ◽  
System Size ◽  
Conducting Liquid ◽  
Elementary Model ◽  
Linear Current ◽  
Technical Details ◽  
Solid Walls ◽  
The Magnetic Field

We analyse numerically a pinch-type instability in a semi-infinite planar layer of inviscid conducting liquid bounded by solid walls and carrying a uniform electric current. Our model is as simple as possible but still captures the salient features of the instability which otherwise may be obscured by the technical details of more comprehensive numerical models and laboratory experiments. Firstly, we show the instability in liquid metals, which are relatively poor conductors, differs significantly from the astrophysically relevant Tayler instability. In liquid metals, the instability develops on the magnetic response time scale, which depends on the conductivity and is much longer than the Alfvén time scale, on which the Tayler instability develops in well conducting fluids. Secondly, we show that this instability is an edge effect caused by the curvature of the magnetic field, and its growth rate is determined by the linear current density and independent of the system size. Our results suggest that this instability may affect future liquid-metal batteries when their size reaches a few metres.

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