Analysis and Characterization of DC Bus Ripple Current of Two-Level Inverters Using The Equivalent Centered Harmonic Approach

Date

2011-09-22

Author

Ayhan, Ufuk
Hava, Ahmet Masum

Metadata

Show full item record

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

Item Usage Stats

206
views

0
downloads

The dc bus PWM ripple current of three-phase two-level voltage source inverters is a function of the PWM method, the load current magnitude, power factor angle, and the modulation index. Thus, the ripple current characteristics are highly involved and difficult to understand. Using the double Fourier integral approach, this paper investigates the ripple current characteristics thoroughly for a wide range of operating conditions and PWM methods. Then, the equivalent harmonic approach is used to lump the ripple current carrier frequency component and its sidebands to the center as a single frequency equivalent (and the same done for the multiples of the carrier). With this approach the capacitor ESR based losses are predicted easily and the dominant frequency range can be understood better. Thus, a better inverter and dc bus capacitor design can be achieved. Analysis is supported by means of simulations and a high degree of correlation is obtained. The paper additionally evaluates and suggests PWM methods for various inverter applications with the dc bus ripple performance being the main constraint. Thus, it is beneficial for the design engineer.

Subject Keywords

Pwm, Common-mode voltage

URI

https://hdl.handle.net/11511/53380

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

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...
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...
Analytical calculation of collapse voltage of CMUT membrane Nikoozadeh, A; Bayram, Barış; Yaralioglu, GG; Khuri-Yakub, BT (2004-01-01) Because the collapse voltage determines the operating point of the capacitive micromachined ultrasonic transducer (CMUT), it is crucial to calculate and control this parameter. One approach uses parallel plate approximation, where a parallel plate motion models the average membrane displacement. This usually yields calculated collapse voltage 25 percent higher than the actual collapse voltage. More accurate calculation involves finite element method (FEM) analysis. However, depending on the required accurac...
Comparison of the Effects of Nonlinearities for Si MOSFET and GaN E-HEMT Based VSIs Yuruk, Huseyin; Keysan, Ozan; Ulutas, Baris (2021-07-01) Nonlinearities in voltage source inverters (VSIs) such as; dead time, switching time, delay time, voltage drops on the power switches, parasitic capacitance, etc., are considered to be the main sources of the output voltage distortions. These distortions result in low-order harmonics in the output current, which in turn increase core losses and create torque ripples. In particular, for low-speed applications with low-inductance motors, the control performance and the stability of the system degrades substan...

Citation Formats

U. Ayhan and A. M. Hava, “Analysis and Characterization of DC Bus Ripple Current of Two-Level Inverters Using The Equivalent Centered Harmonic Approach,” Phoenix, AZ, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/53380.