Experimental evaluation of the incidence of operating conditions on measurement uncertainty of conducted emissions by power drive systems

An experimental study about uncertainty in measurements of conducted emissions of variable speed drives due to variations of operating conditions is presented in this paper. The research is part of a wider experimental program aimed at determining what quantities affect emissions most significantly so that electromagnetic compatibility test procedures are performed under appropriate conditions according to the specific destination of the equipment under test, in such a way that results represent the worst case scenario for compliance testing. A global index based on the average weighted distance between measurements and standard limits is introduced to help determine which parameters show predominant influence. Effects of voltage asymmetry and amplitude, motor's frequency, and applied torque have been investigated. Results show that frequency of motor and load applied cause the most relevant changes in emissions

[1]  Li Ran,et al.  Measurement of conducted electromagnetic emissions in PWM motor drive systems without the need for an LISN , 1999 .

[2]  G. Bucci,et al.  On-line digital measurement for the quality analysis of power systems under non-sinusoidal conditions , 1996, Quality Measurement: The Indispensable Bridge between Theory and Reality (No Measurements? No Science! Joint Conference - 1996: IEEE Instrumentation and Measurement Technology Conference and IMEKO Tec.

[3]  William J. Diamond.  Practical Experiment Designs for Engineers and Scientists , 1981 .

[4]  Carmine Landi,et al.  Quality assessment of electrical drives with strongly deformed supply waveform , 2001 .

[5]  Carmine Landi,et al.  A digital measurement station for RF-conducted emissions monitoring , 2002, IEEE Trans. Instrum. Meas..

[6]  N Allaith,et al.  Investigation of conducted emissions produced by a PWM inverter-fed motor drive , 1998, 8th International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.98EX227).

[7]  Giovanni Bucci,et al.  On-line digital measurement for the quality analysis of power systems under nonsinusoidal conditions , 1999, IEEE Trans. Instrum. Meas..

[8]  Antonio Testa,et al.  A comparative analysis of high frequency currents generated by pulsewidth modulation techniques , 1999, IEEE International Electric Machines and Drives Conference. IEMDC'99. Proceedings (Cat. No.99EX272).

[9]  C. De Capua,et al.  New measurement approach to variable speed drive testing based on multilevel multivariable experiments theory , 1999, IMTC/99. Proceedings of the 16th IEEE Instrumentation and Measurement Technology Conference (Cat. No.99CH36309).

[10]  Domenico Capriglione,et al.  Evaluation of the measurement uncertainties in the conducted emissions from adjustable speed electrical power drive systems , 2004, IEEE Transactions on Instrumentation and Measurement.

[11]  Aldo Boglietti,et al.  Induction motor high frequency model , 1999, Conference Record of the 1999 IEEE Industry Applications Conference. Thirty-Forth IAS Annual Meeting (Cat. No.99CH36370).