Performance Characteristics of the Reduced Common Mode Voltage Near State PWM Method

Date

2009-07-01

Author

Un, E.
Hava, Ahmet Masum

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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 overall performance compared to other methods. NSPWM has low common mode voltage and this results in low common mode current. NSPWM has low switching losses comparable to those of DPWM methods. it has low current ripple compared to the classical methods, and it exhibits no significant overvoltage problems in long cable applications as its pulse pattern involves a sufficient distance between the polarity reversing voltage pulses.

Subject Keywords

Common Mode Current, Common Mode Voltage, EMI, Harmonic, Inverter, Long Cable, PWM, Ripple, Scalar PWM, Space Vector, Voltage Reflection, VSI

URI

https://hdl.handle.net/11511/55769

Journal

EPE JOURNAL

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Department of Electrical and Electronics Engineering, Article

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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...
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...
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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

E. Un and A. M. Hava, “Performance Characteristics of the Reduced Common Mode Voltage Near State PWM Method,” EPE JOURNAL, pp. 41–49, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55769.