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A PWM strategy dedicated to RMS current reduction in DC link capacitor of an embedded three phase inverter
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| Author(s) |
Thê Dung NGUYEN, Nicolas PATIN, Guy FRIEDRICH |
| Abstract |
This article presents an extension of the Double Carrier Pulse Width Modulation strategy (DCPWM)presented in [1] called Extented DCPWM (Ext-DCPWM) strategy aiming at reducing the RMS currentowing through DC link ltering capacitors on embedded systems. Instead of utilizing two adjacentactive vectors as classic PWM strategies, this new strategy utilizes two non-adjacent active vectors in thecase of low modulation index or three consecutive active vectors in the case of high modulation index.Analytical calculations show that this new strategy is particularly eective in terms of ltering capacitorRMS current for high power factor compared to space vector PWM (SVPWM) which is used as thestrategy of reference. It is also shown that induced switching losses of this new strategy can be 50\%lower than that of SVPWM. The implementation on DSP boards can be done easily with help of currentsensors. |
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| Filename: | 0547-epe2011-full-18364106.pdf |
| Filesize: | 479.8 KB |
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| Type |
Members Only |
| Date |
Last modified 2012-01-26 by System |
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