A compact active filter to eliminate common-mode voltage in a SiC-based motor drive

Common-Mode Voltage Elimination in Multilevel Power Inverter-Based Motor Drive Applications

“…Although, these converters are more efficient than siliconbased converters, their high switching frequencies and high dv /dt worsen the aforementioned CMV problem [14], [29]- [31].…”

Mitigation of Common Mode Voltage Issues in Electric Vehicle Drive Systems by Means of an Alternative AC-Decoupling Power Converter Topology

“…In order to extend the results of the study close to the real application, the performance of the proposed AC-decoupling topology is simulated using a complete and accurate EV model (including vehicle dynamics and a detailed propulsion system model) by means of state-of-the-art digital real-time simulation.Energies 2019, 12, 3349 2 of 27 the commutations of the power converter devices generate significant high-frequency CMV variations (Figure 1a). As a result, these voltage variations can produce not only high electromagnetic interferences (EMI) [6][7][8], but also shaft voltages (Figure 1b) in the electric machine [9][10][11], producing new capacitive paths [10]. These paths result in high-frequency leakage currents (Figure 1c) circulating through the motor bearings [12][13][14].…”

“…This will allow significantly increasing the operating switching frequencies when compared to conventional insulated gate bipolar transistor (IGBT) based Si technologies. As a consequence, CMV-derived issues will become more prevalent, as the faster switching will introduce faster CMV variations over time (dv/dt) [9][10][11]20].Considering all the previous, mitigation of CMV in electric drives has become a relevant research topic for the scientific community and the industry [6,7,[21][22][23]. In this context, the inclusion of dedicated filters (passive or active) [21,23,24] and the implementation of specific modulation techniques [21,[24][25][26] are widespread CMV reduction solutions.Alternatively, it is possible to use specific power conversion topologies (derivatives from the conventional two-level three-phase inverter topology) to achieve the same goals.…”

“…This will allow significantly increasing the operating switching frequencies when compared to conventional insulated gate bipolar transistor (IGBT) based Si technologies. As a consequence, CMV-derived issues will become more prevalent, as the faster switching will introduce faster CMV variations over time (dv/dt) [9][10][11]20].…”

Filter design of high power density converter with weight, size and thermal considerations

“…Active filters use controllable devices to produce the voltage to cancel CM voltage, includes different modulation schemes, filter topologies, and inverter configurations [40][41][42]. One of the popular methods is the adoption of multilevel converter to reduce CM voltage.…”