Abstract
In this paper, the modeling methodology of the AC drive system with a Parallel Quasi-Resonant DC Link Inverter (PQRDCLI) is described. A presented modeling approach is an attractive tool used for the effective evaluation of a common-mode (CM) voltage and grounds current reduction methods. Designed models of inverter, induction machine (IM), and cable are simple, thus the methods for parameter extraction are not complicated. Verification of the proposed modeling approach was realized with the use of the the Synopsys (Mountain View, CA, USA) SABER simulator, while simulation results were experimentally verified. Operation principles of the proposed PQRDCLI converter topology are also described. Based on simulation and experimental results, it was confirmed that the proposed PQRDCLI solution represents required performance within the reduction of common-mode voltage and ground current in electric drives. Moreover, comparisons from a simulation complexity point of view have been performed to the existing methods. The evaluation is being shown at the end of the paper. It is confirmed that the presented method is simple, fast, accurate, and robust as well.
Highlights
The use of the modern power semiconductor devices enables the operation of variable-frequency drives with carrier frequencies up to 200 kHz [1]
Based on simulation and experimental results, it was confirmed that the proposed Parallel QuasiResonant DC Link Inverter (PQRDCLI) solution represents required performance within the reduction of common-mode voltage and ground current in electric drives
It can be supposed that the reliability of the drive system fed by should be higher aspects into account, it can be supposed that the reliability of the drive system fed by PQRDCLI
Summary
The use of the modern power semiconductor devices enables the operation of variable-frequency drives with carrier frequencies up to 200 kHz [1]. Energies 2020, 13, 5090 currents occurrence are proposed, for example the use of conductive greases, application of insulated bearings or motor shaft grounding These methods do not fully eliminate the bearing’s currents problem, because these solutions do not affect the CM voltage. Proposed solutions, dedicated to EMI analyses, ensures high accuracy of simulation results in a range of frequency up to tens of MHz [12] These models take into account many aspects, e.g., the impact of parasitic capacitances (including nonlinear capacitances of semiconductors), resistances and inductances of paths and cables, skin effects, etc. Simulation enables evaluation of PQRDCLI properties at the beginning of the designing process when a target topology is developed This task requires to use the models of semiconductor devices reflecting the dynamics of their switching process. The presented modeling approach may be successfully used for the evaluation of reduction of CM voltage and iPE current
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