Case Study 2: Medium-Voltage Motor Drive Built with DCMC
The use of multilevel converters in electric drives is a topic of great interest, especially when dealing with medium-voltage machines. Besides the main advantage of voltage extension when using multilevel converters, the synthesis of a stepped voltage waveform impacts positively in some key aspects of the conversion system, as, for example, the insulation failures due to common mode voltages and wave reflections, the lifetime reduction of motor bearings due to parasitic capacitive currents, and machine derating due to the harmonic currents on the windings [1]. Due to the lower harmonic content of the stepped voltage waveforms, the multilevel converters are also ...
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