| Title |
A study on the Noise Reduction of Uninterruptible Power Supply using Random PWM Method |
| Authors |
Tae-Wook Eom ; Byung-Soon Lee ; Jae-Hak Lee |
| DOI |
http://dx.doi.org/10.5207/JIEIE.2014.28.11.100 |
| Keywords |
Uninterruptible Power Supply ; Carrier Frequency Modulated PWM ; Space Vector Modulation |
| Abstract |
In this paper, Uninterruptible Power Supply(UPS) Inverter system using Carrier Frequency Modulated PWM (CFM-PWM) is proposed to reduced harmonics and electromagnetic noise. Power conversion of UPS system is executed by the ON-OFF operation of semiconductor switching devices. However, this switching operation causes the surge and EMI which deteriorate the reliability of the UPS system. This Problems improved by Random PWM switching method. The simulation results of the proposed system was compared with the system using conventional method using Matlab/Simulink. The results show that the output voltage and current harmonics of the proposed UPS system significantly decreased and spread into wide band area by the proposed Carrier Frequency Modulated PWM(CFM-PWM) method based on the Space Vector Modulation. |