Technical and economical considerations in the application of variable-speed drives with electric motor systems

In the European Union (EU), variable-speed drives (VSDs) were identified as the motor systems technology having the most significant electricity savings potential. In the EU, the identified economic electricity savings potential with the application of VSDs, by the year 2015, in industrial and tertiary sectors, are 39 and 8 TWh/year, respectively. However, only a small percentage of this potential is being used. In this paper the characterization of the current market of the VSDs is presented, including the average prices, the installation costs, and the total sales in each EU country, per power range. Selected VSD applications are presented. The key barriers to a wider application of VSDs are identified. In particular, the power quality and reliability problems associated with the use of VSDs are presented and possible technical solutions are discussed.

[1]  S. Barker.  Avoiding premature bearing failure with inverter fed induction motors , 1999 .

[2]  Anibal T. de Almeida,et al.  Energy efficiency improvements in electric moters and drives , 1997 .

[3]  Thierry Lebey,et al.  Off line measurements of partial discharges in turn insulation of low voltage rotating machines , 2000, Conference Record of the 2000 IEEE International Symposium on Electrical Insulation (Cat. No.00CH37075).

[4]  Doyle F. Busse,et al.  Characteristics of shaft voltage and bearing currents , 1997 .

[5]  Thomas A. Lipo,et al.  Circulating type motor bearing current in inverter drives , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[6]  Werner Leonhard,et al.  Control of Electrical Drives , 1990 .

[7]  Mutsuo Nakaoka,et al.  3-level 3-phase voltage-fed soft-switching inverter with new space voltage vector modulation scheme and its feasible evaluations , 2000 .

[8]  Doyle F. Busse,et al.  Bearing currents and their relationship to PWM drives , 1997 .

[9]  Tore Undeland,et al.  Power Electronics: Converters, Applications and Design , 1989 .

[10]  G. C. Stone,et al.  Examples of stator winding partial discharge due to inverter drives , 2000, Conference Record of the 2000 IEEE International Symposium on Electrical Insulation (Cat. No.00CH37075).

[11]  B. S. Oyegoke.  Voltage distribution in the stator winding of an induction motor following a voltage surge , 2000 .

[12]  Bimal K. Bose,et al.  Power Electronics and Variable Frequency Drives , 1996 .

[13]  Y. Q. Xiang,et al.  A novel Active Common-mode-voltage Compensator (ACCom) for bearing current reduction of PWM VSI-fed induction motors , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[14]  Annette von Jouanne,et al.  The Effects of PWM Inverters on the Winding Voltage Distribution in Induction Motors , 2001 .

[15]  S. Hilfert,et al.  An approach for measuring partial discharges in PWM inverter driven induction machines , 2000, Conference Record of the 2000 IEEE International Symposium on Electrical Insulation (Cat. No.00CH37075).

[16]  Hamid A. Toliyat,et al.  Predicting the transient effects of PWM voltage waveform on the stator windings of random wound induction motors , 1999 .

[17]  Matthias Berth,et al.  Electrical stress and failure mechanism of the winding insulation in PWM-inverter-fed low-voltage induction motors , 2000, IEEE Trans. Ind. Electron..

[18]  Mutsuo Nakaoka,et al.  Feasible performance evaluations of 3-level 3-phase voltage source soft-switching inverter using IGBT modules , 1999, Proceedings of the IEEE 1999 International Conference on Power Electronics and Drive Systems. PEDS'99 (Cat. No.99TH8475).