Modeling Induction Motor for Prediction of High frequency problems

Abstract

In this paper a novel high-frequency model of Induction motor is presented for investigating induction motor behavior in a wide electromagnetic interference (EMI)-frequency range from 100 Hz to 30 MHz. This model is suitable for prediction of common mode current, EMI problems and terminal over-voltage analysis. The model parameters are estimated by asymptotical method using novel differential and common-mode impedance measurements. The values of parameters are limited in a specified range and then optimized using genetic algorithm (GA). A least mean square method is used with GA optimization to solve the identification problem. The proposed model can also be used to predict the high-frequency problems and design EMI filters to improve electromagnetic compatibility limitation in cable fed motor-drive system. In order to validate the proposed high-frequency motor model, novel common-mode and differential-mode measuring tests have been carried out on the 9.3 kW industrial induction motor using a network analyzer in a wide frequency range as described. Very good agreement was seen between the experimental and simulation results of the proposed model in both magnitude and phase.

Synchronous Machine Winding Modeling Method Based on Broadband Characteristics

“…According to References [16][17][18], a single-phase machine high-frequency lumped parameter circuit model derived based on common mode and differential mode impedance is constructed, and the equivalent model of single-phase winding is shown in Figure 2a. In the Figure 2a, according to Reference [17], R g1 and C g1 represent the parasitic resistance and capacitance between the stator winding and the motor frame; R g2 and C g2 represent the parasitic resistance and capacitance between the stator neutral and motor frame; and R e , R Cu , and L d represent the stator iron loss, stator winding copper loss, and stator winding leakage inductance, respectively.…”

“…The connection diagram is shown in Figure 5. The common mode and the differential mode measurements can prevent the influence of other phases in a single-phase measurement, and it can contain more characteristic curve information, which is closer to the actual machine working characteristic curve than single-phase measurements [9,14,[16][17][18].…”

“…Sci. 2021, 11, x FOR PEER REVIEW 8 and it can contain more characteristic curve information, which is closer to the ac machine working characteristic curve than single-phase measurements [9,14,[16][17][18].…”

“…Therefore, it is necessary to propose a simple and fast machine winding model, which can prevent the interference of other phases in the measurement process, where the parameters have a certain practical physical significance to reflect the actual situation of the internal winding without losing a certain degree of accuracy so as to provide a research basis for the study of electromagnetic interference and other problems [9,[16][17][18]. In conclusion, this paper proposes a modeling method of synchronous machine winding based on broadband characteristics, based on the existing research.…”