Influence of Inverter Output Filter on the Selection of PWM Technique

This paper deals with the suitability of various pulse-width modulation techniques for a variable-speed AC drive equipped with a sinusoidal differential-mode and common-mode filter at the inverter output. Simulations and experiments are used for the investigation. If the average common-mode voltage is changed abruptly, the filter resonance may be excited, and the common-mode voltage at the motor terminals may rise to values higher than those obtained without the filter. This phenomenon may cause difficulties when the modulation is started, and it also creates a fundamental problem when a two-phase modulation method is used. The resonance problem can be avoided by selecting a modulation technique that does not cause sudden changes in the average common-mode voltage. A starting algorithm is proposed, enabling a trouble-free start of the drive equipped with a sinusoidal common-mode filter

[1]  Alfio Consoli,et al.  Reduction of common mode currents in PWM inverter motor drives , 1997, IAS '97. Conference Record of the 1997 IEEE Industry Applications Conference Thirty-Second IAS Annual Meeting.

[2]  Y. Murai,et al.  Leakage current reduction for a high-frequency carrier inverter feeding an induction motor , 1992 .

[3]  J. Kolar,et al.  Influence of the modulation method on the conduction and switching losses of a PWM converter system , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[4]  A. Nabae,et al.  A novel PWM scheme of voltage source inverters based on space vector theory , 1990 .

[5]  J. Holtz,et al.  Pulsewidth modulation for electronic power conversion , 1994, Proc. IEEE.

[6]  Dianguo Xu,et al.  Research on a novel inverter output passive filter for reducing dv/dt at motor terminals in a PWM drive system , 2003, Sixth International Conference on Electrical Machines and Systems, 2003. ICEMS 2003..

[7]  N. Hanigovszki.  EMC Output Filters for Adjustable Speed Drives , 2005 .

[8]  H. van der Broeck,et al.  Analysis and Realization of a Pulse Width Modulator Based on Voltage Space Vectors , 1986, 1986 Annual Meeting Industry Applications Society.

[9]  Yen-Shin Lai.  Investigations into the effects of PWM techniques on common mode voltage for inverter-controlled induction motor drives , 1999, IEEE Power Engineering Society. 1999 Winter Meeting (Cat. No.99CH36233).

[10]  Hirofumi Akagi,et al.  Design and performance of a passive EMI filter for use with a voltage-source PWM inverter having sinusoidal output voltage and zero common-mode voltage , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[11]  J.K. Steinke,et al.  Use of a LC filter to achieve a motor friendly performance of the PWM voltage source inverter , 1997, 1997 IEEE International Electric Machines and Drives Conference Record.

[12]  Yen-Shin Lai,et al.  Optimal common-mode Voltage reduction PWM technique for inverter control with consideration of the dead-time effects-part I: basic development , 2004, IEEE Transactions on Industry Applications.

[13]  A. Schonung,et al.  Static Frequency Changers with "Subharmonic" Control in Conjunction with Reversible Variable-Speed A.C.Drives , 1964 .