Abstract
This paper proposes a novel modeling methodology for the investigation of long-cable-fed induction motor drive overvoltage. A high-frequency cable model based on improved high-order multiple-π sections is proposed. The cable model parameters are identified from the DM impedances in open circuit (OC) and short circuit (SC). An improved high-frequency motor equivalent circuit model is developed to represent the motor high-frequency behavior for the time- and frequency-domain analyses. The motor equivalent-circuit parameters for the differential mode (DM) and common mode (CM) are extracted based on the measurements. The proposed modeling methodology is verified on an experimental 2.2 kW ABB motor drive benchmark system. The motor overvoltage transients predicted by the proposed model is in excellent agreement with the experimental results and represents a significant improvement compared with the conventional models.
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