This paper focuses on designing a distributed dc-link capacitor bank using multi-layer series-connected ceramic capacitors (MLSCs) which have higher operating temperature, lower ESL and lower...
Investigation of Busbar-Structure for High Power Converter Yifeng Zhu Abstract In high power converter design, low-inductance busbar connecting DC capacitors and power devices is main concern to improve the quality of the whole power electronics system. This paper analyzes and designs a busbar structure in
filter combining a transmission-line busbar filter and a one-turn inductor for dc-fed three-phase motor drive systems, " IEEE Transactions on Power Electr onics, pp. 5588–5602, 2013.
Measurements of various capacitor/bus structures havedemonstrated that the ESL seen at the IGBT terminals is dominated by the interconnection when using properly designed annular form factor capacitors. While the capacitor ESL does have an effect, the contribution is typically around 20% of the total. The inductance values measured for a 1000 µF capacitor have been
This paper focuses on designing a distributed dc-link capacitor bank using multi-layer series-connected ceramic capacitors (MLSCs) which have higher operating temperature, lower ESL
Investigation of Busbar-Structure for High Power Converter Yifeng Zhu Abstract In high power converter design, low-inductance busbar connecting DC capacitors and power devices is main
Based on this, the design principle of the laminated busbar is proposed, and an optimized design structure of the laminated busbar suitable for the large-capacity back-to-back converter is given. Finally, the results were
The physical structure of bus bars offers unique features in mechanical design. For example, complete power distribution subsystems can also act as structural members of a total system. The proper design of bus bars depends on an application''s mechanical and electrical requirements. This section includes basic formulas and data to aid design engineers in specifying bus bars
Abstract— Busbar structures must first achieve the principal function of a low inductive, multiport interconnection. Therefore, large sheets, very close to each other are used. An interesting issue is to use the inherent capacitive effects of busbars for achieving an integrated EMI filter function.
The corners and edges of the busbar structure are radiused in such a way that the radius of the bend made is always greater than or equal to the thickness of the busbar conductor [12]. Figure 12
Abstract—This paper presents a comprehensive analysis about bus bar design procedure. Some applications in terms of rated power and shape are investigated regarding their particular re-quirements and challenges. The dc-link capacitor selection is
Mounting Structure for Capacitor Bank. Laminated bus bars provide a low inductance connection for capacitors. The assembly was designed for an automated production process and the assembly is the DC capacitor bank used in conjunction with high current, high speed switching applications. Positive and negative layers are formed and laminated without outside insulation.
– DC link capacitor, – Bus structure, – Internal IGBT branches. • Different IGBT input configurations will be evaluated • Inductance and overshoot measurements will be conducted -> validate 20% overshoot reduction with SBE''s integrated capacitor/bus. Analysis of IGBT input (1) • Flux3D magneto-dynamic finite element analysis platform used to evaluate the inductance of
The role of a busbar is to link several points of a power electronics converter: capacitors, semiconductors, and often to achieve series or parallel association of these devices.
Based on this, the design principle of the laminated busbar is proposed, and an optimized design structure of the laminated busbar suitable for the large-capacity back-to-back converter is...
Abstract— Busbar structures must first achieve the principal function of a low inductive, multiport interconnection. Therefore, large sheets, very close to each other are used. An interesting
This paper presents the design of a busbar for a 500 kVA three-level active natural clamped converter. The layout of the busbar is discussed in detail based on the analysis of the multiple
Abstract—This paper presents a comprehensive analysis about bus bar design procedure. Some applications in terms of rated power and shape are investigated regarding their particular requirements and challenges. The DC-link capacitor selection is one of the first and most important steps.
When this capacitor structure is integrated with a suitable laminar bus topology for connection into the IGBT module, a significant reduction in equivalent series inductance (ESL) can be achieved as compared to traditional designs. Operating in this new low-ESL regime, the need for external by-pass capacitors (often referred to as "snubbers") to mitigate voltage overshoot can
Based on this, the design principle of the laminated busbar is proposed, and an optimized design structure of the laminated busbar suitable for the large-capacity back-to-back converter is...
Abstract—This paper presents a comprehensive analysis about bus bar design procedure. Some applications in terms of rated power and shape are investigated regarding their particular re
In this paper, an X-shaped busbar structure for cancelling the parasitic inductances of capacitors in a differential-mode (DM) filter are proposed and its improvement
This paper focuses on designing a distributed dc-link capacitor bank using multi-layer series-connected ceramic capacitors (MLSCs) which have higher operating temperature, lower ESL and lower volume than film capacitors. The paper addresses the design of a busbar assembly connecting several MLSCs to the inverter power modules and the power source. The main
Abstract—This paper presents a comprehensive analysis about bus bar design procedure. Some applications in terms of rated power and shape are investigated regarding their particular requirements and challenges. The DC-link capacitor selection is one of the first and most
In this paper, an X-shaped busbar structure for cancelling the parasitic inductances of capacitors in a differential-mode (DM) filter are proposed and its improvement effects are investigated by evaluating the voltage gains calculated from the scattering parameters obtained from both measurement and 3D EM simulation. The results
MOUNTING STRUCTURE FOR CAPACITOR BANK Laminated bus bars provide a low inductance connection for capacitors. The assembly was designed for an automated production process and the assembly is the DC capacitor bank used in conjunction with high-current, high-speed switching applications. Positive and negative layers are formed and laminated
Based on this, the design principle of the laminated busbar is proposed, and an optimized design structure of the laminated busbar suitable for the large-capacity back-to-back converter is given. Finally, the results were effectively verified by simulation analysis and a 180 kW integrated intermediate frequency auxiliary power converter.
As a key component of a large-capacity converter, the laminated busbar can improve the reliability, integration and power density of the converter and has great advantages in reducing the parasitic inductance of the switching loop. The laminated busbar suitable for a high-capacity back-to-back converter has a complex structure, and couple with each side converter.
This paper presents the design of a busbar for a 500 kVA three-level active natural clamped converter. The layout of the busbar is discussed in detail based on the analysis of the multiple commutation loops, magnetic cancelling effect, and DC-link capacitor placement.
The most common and easiest connection method for a capacitor onto a bus bar is a screw or bolt on connection. Soldering or spot welding connection methods can also be used, but they greatly increase the cost and complexity of the design. In sum, the bus bar design starts along with the power electronics converter design.
There are ten capacitors in two rows. The orange plate is the negative/positive busbar while the yellow one is the neutral busbar. The finalized busbar design for single phase is shown in Fig. 12. Fig. 10.
The laminated structure of the bus bar creates a high frequency capacitor that helps mitigate the noise propagation , , though this unintended filter is likely not enough to completely remove the issue. An unavoidable result of fast switching devices is the high frequency harmonics, termed Electromagnetic Interfer-ence (EMI) .
This is in good coherence with the remark of section III: the influence of external conductors on the loop inductance of a busbar is weak. The rest of the paper will thus focus only on the three "actives" sheets of copper: the DC Bus (cyan and grey) and the capacitor interconnection (black).
V. CONCLUSIONS This paper presents the design of a laminated busbar for a 500 kVA three-level ANPC converter. With the consideration of multiple commutation loops and the current flowing directions in the converter, the layout of the busbar is specially designed to achieve the magnetic cancellation between adjacent busbar layers.
In the application scenario of a back-to-back converter with multi-bus capacitors in parallel, the capacitor parallel affects the instantaneous current distribution of the switch in the laminated busbar so it is necessary to analyze the instantaneous current distribution of the multi-capacitor parallel busbar theoretically.
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