Bus Bar Design for High-Power Inverters

Partial Stray Inductance Modeling and Measuring of Asymmetrical Parallel Branches on the Bus-Bar of Electric Vehicles

“…High-speed switching devices produce lots of EMI noise during the fast on-off process, which usually interferes with nearby equipment through conduction or radiation [8][9][10]. Typical problems caused are measurement errors in sensors, false control signals, and interference in the gate voltages of switching devices [8].…”

“…Typical problems caused are measurement errors in sensors, false control signals, and interference in the gate voltages of switching devices [8]. Excessive noise can deteriorate control, reduce efficiency, and cause malfunctions of system.…”

“…Due to the low stray inductance, the laminated bus-bar has now been widely used in power electronics and converter products [5][6][7]. With power devices continuing to move upwards in current levels and switching frequency, laminated bus-bars have been attracting increasing interest from both industry and academia for the system benefits they exhibit [8]. The over-voltage spikes across the semiconductor during switching directly results from the commutation loop stray inductance.…”

Improvement of Heat Dissipation Characteristics of Cu Bus-Bar in the Switchboards through Shape Modification and Surface Treatment

“…At this time, because the plate surface area facing each other is relatively large, the bus-bar is not stabilized due to the influence of the electromagnetic field. The bus-bar cannot bend in the three-axis direction when the bus-bar is placed in the switchboard, hence, the volume of the switchboard increases.Cylindrical bus-bar was developed to resolve the problems of plate-shaped bus-bars, and they can reduce the interference of electromagnetic fields from adjacent bus-bars while occupying a relatively small volume [9,10].However, in the same manner as the plate-shaped bus-bar, the electric resistance characteristic of the cylindrical bus-bar is changed due to the deformation of the joint parts by the pressing process during the fastening of the bus-bar. In addition, the current path of the joint parts is changed due to the screw, resulting in a localized temperature rise.…”

“…Cylindrical bus-bar was developed to resolve the problems of plate-shaped bus-bars, and they can reduce the interference of electromagnetic fields from adjacent bus-bars while occupying a relatively small volume [9,10].…”