On the Contribution of PWM Methods to the Common Mode (Leakage) Current in Conventional Three-phase Two-level Inverters as Applied to AC Motor Drives

Date

2008-10-09

Author

Hava, Ahmet Masum
Uen, Emre

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

211
views

0
downloads

This paper experimentally investigates the Common Mode Voltage (CMV) and Common Mode Current (CMC, leakage current) characteristics of various PWM methods for the classical two-level three-phase Voltage Source Inverter (VSI) as applied to induction motors. The classical SVPWM and DPWM methods which have high CMV/CMC, and the recently proposed Reduced CMV (RCMV) PWM methods, such as NSPWM and AZSPWM1 are considered. The effect of including the low cost industry solution of the Common Mode Inductor (CMI) for CMC reduction is investigated. Furthermore, the dependency of the CMC on the inverter topology is investigated by the experimental evaluation of a commercial three-level neutral-point-clamped (NPC) VSI. Based on the experimental results, it is shown that it is beneficial to employ high performance RCMV-PWM methods for the purpose of CMV/CMC reduction. It is shown that including a small CM1 further enhances the CMC performance of a drive. Such a configuration provides comparable CMC performance to that of a three-level NPC-VSI and it is more favorable as it is more economical and efficient. The experiments involve a 4-kW, 4-pole induction motor driven by a two-level VSI and a three-level NPC-VSI with diode rectifier front-ends supplied from the three-phase 400 V, 50 Hz power line.

Subject Keywords

Inverter, VSI, Two-Level, Three-Level, NPC-VSI, PWM, Common Mode Voltage, Common Mode Current, SVPWM, DPWM1, NSPWM, AZSPWM1, Common Mode Inductor

URI

https://hdl.handle.net/11511/55777

Conference Name

IEEE Industry-Applications-Society Annual Meeting

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

A High-Performance PWM Algorithm for Common-Mode Voltage Reduction in Three-Phase Voltage Source Inverters Hava, Ahmet Masum (2011-07-01) A high-performance pulsewidth modulation (PWM) algorithm with reduced common-mode voltage (CMV) and satisfactory overall performance is proposed for three-phase PWM inverter drives. The algorithm combines the near-state PWM (NSPWM) method that has superior overall performance characteristics at high modulation index, and MAZSPWM, a modified form of the active zero-state PWM method (AZSPWM1), which is suitable for low modulation index range of operation. Since AZSPWM1 has line-to-line voltage pulse reversals...
Performance characteristics of the reduced common mode voltage Near State PWM method Un, Emre; Hava, Ahmet Masum (2007-09-05) The Near State PWM (NSPWM) method, which has low common mode voltage/current is proposed for three-phase voltage source inverter drives. The method is described and its voltage linearity, output current ripple, DC bus current ripple, common mode voltage and output line-to-line pulse patterns are thoroughly studied and compared with classical PWM methods. The theory, simulation, and laboratory experiments illustrate that NSPWM has low common mode voltage, results in less common mode current, has low switchin...
Performance Characteristics of the Reduced Common Mode Voltage Near State PWM Method Un, E.; Hava, Ahmet Masum (2009-07-01) The Near State PWM (NSPWM) method, which has low common mode voltage and low common mode current, is proposed for three-phase voltage source inverter drives. The method is described and its voltage linearity, output current ripple, DC bus current ripple, common mode voltage and output line-to-line pulse patterns are thoroughly studied and compared with classical PWM methods. The theory, simulation, and laboratory experiments illustrate that in the high modulation index operating range NSPWM has superior ove...
A Near State PWM Method With Reduced Switching Frequency And Reduced Common Mode Voltage For Three-Phase Voltage Source Inverters Un, Emre; Hava, Ahmet Masum (2007-05-05) The Near State PWM (NSPWM) method, which reduces the common mode voltage/current, is proposed for three-phase PWM inverter drives. The optimal voltage vectors and their sequences are determined. The voltage linearity and DC bus and AC output PWM current ripple characteristics are studied. The method is thoroughly investigated and its performance is compared to conventional methods. Theory, simulations, and experiments show that NSPWM exhibits superior common mode and satisfactory PWM ripple performance char...
Common-Mode Voltage Reduction Pulsewidth Modulation Techniques for Three-Phase Grid-Connected Converters Hou, Chung-Chuan; Shih, Chih-Chung; Cheng, Po-Tai; Hava, Ahmet Masum (2013-04-01) This paper experimentally investigates the performance of three-phase voltage source pulsewidth modulation (PWM) converter, with the grid interfaced photovoltaic energy conversion system being the main application. In such applications the ground leakage current [common mode current (CMC)] should be much less than an ampere and this is difficult to obtain in transformerless (direct) connected systems. With the target being the reduction of the common mode voltage (CMV) and CMC, the converter performance is ...

Citation Formats

A. M. Hava and E. Uen, “On the Contribution of PWM Methods to the Common Mode (Leakage) Current in Conventional Three-phase Two-level Inverters as Applied to AC Motor Drives,” presented at the IEEE Industry-Applications-Society Annual Meeting, Alberta, CANADA, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55777.