A finite element method for transient analysis of power electronic motor drives including parasitic capacitive effect and external circuit

A two dimensional (2-D) finite element method (FEM) of transient electromagnetic field for modeling power electronic motor drives is presented. The proposed method takes into account the parasitic capacitive effect and can be coupled with arbitrarily connected circuits. The FEM formulation which includes the displacement current in the direction of the modelpsilas depth is deduced. The displacement current effect in the plane of the solution domain is represented by coupling the circuit of capacitances into the FEM equations. By introducing additional unknowns, the final set of the system equations has a symmetrical coefficient matrix. A method using electric charge as an excitation for the computation of the capacitance matrix is also proposed for reducing the computation time. The developed algorithm has been applied to simulate systems with power sources having high frequency and/or high dv/dt.

[1]  David B. Hyypio,et al.  Simulation of cable and winding response to steep-fronted voltage waves , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[2]  E. Persson,et al.  Transient effects in application of PWM inverters to induction motors , 1991, Conference Record of 1991 Annual Pulp and Paper Industry Technical Conference.

[3]  Russel J. Kerkman,et al.  Cable characteristics and their influence on motor over-voltages , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[4]  C. J. Melhorn,et al.  Transient effects of PWM drives on induction motors , 1995, Proceedings of 1995 Industrial and Commercial Power Systems Conference.

[5]  David Leggate,et al.  Interaction of drive modulation and cable parameters on AC motor transients , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[6]  A. von Jouanne,et al.  Voltage distribution in the windings of an AC motor subjected to high dV/dt PWM voltages , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[7]  K. Overshott,et al.  The effect of high-voltage lightning impulses on the core properties of transformers , 1989, International Magnetics Conference.

[8]  Hamid A. Toliyat,et al.  Predicting the transient effects of PWM voltage waveform on the stator windings of random wound induction motors , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[9]  A. H. Bonnett,et al.  Analysis of the impact of pulse-width modulated inverter voltage waveforms on AC induction motors , 1994, Proceedings of IEEE Pulp and Paper Industry Conference.

[10]  Ali Abur,et al.  Simulation of voltage stress on the inverter fed induction motor winding supplied through feeder cable , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[11]  Russel J. Kerkman,et al.  PWM inverters and their influence on motor overvoltage , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[12]  D. Lin,et al.  Modeling of solid conductors in two-dimensional transient finite-element analysis and its application to electric machines , 2004, IEEE Transactions on Magnetics.

[13]  A. Hussein,et al.  Modeling and simulation of traveling waves in induction motor drives , 1997, Proceedings of APEC 97 - Applied Power Electronics Conference.

[14]  Yifan Tang,et al.  Analysis of steep-fronted voltage distribution and turn insulation failure in inverter fed AC motor , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[15]  Gary L. Skibinski,et al.  Effect of surge voltage risetime on the insulation of low voltage machines fed by PWM converters , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.