Design and Analysis of Sinusoidal Pulse Width Modulation Techniques for Voltage Source Inverter in UPS Application.pdf

1、PWM techniques has been researched for three decades but there is noexplicit guidelines on how one can choose the desired technique for particularapplication especially in power processing devices. Thus choosing a partic

2、ular PWMtechnique for UPS application remains a challenging task since UPS operate undervarying load conditions. All the techniques appear to give superior performance aswell as short-comings when it comes to control of

3、UPS inverter.
　　Several voltage controlled PWM methods have been proposed in literaturesuch as sinusoidal PWM, sinusoidal PWM with third harmonic injection and spacevector modulation. All these methods aim at generati

4、ng a sinusoidal inverter outputvoltage without low-order harmonics.
　　This paper provides a critical evaluation of sinusoidal PWM techniques for three-phase voltage source inverter for UPS application and proposes a f

5、ramework andguidelines for the selection of the appropriate PWM technique for specific applicationarea. First, an analytical technique is developed for determining the expression for themodulation signals used in the car

6、rier- based sinusoidal and non-sinusoidal schemes.Then sinusoidal efficient PWM techniques are introduces.
　　Several quality factors such as total harmonic factor, waveform quality andswitching losses are measured and

7、 investigated, load condition and power factor in theinverter output are determined for each application. Based on these qualities, an optimumtechnique for each application is identified. The techniques are later verifie