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Download Designing a Three Phase Inverter for a Permanent Magnet Synchronous Motor
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Transcript
16 Amplitude Spectrum of SquareWave 1 |Voltage[V]| 0.8 0.6 0.4 0.2 0 0 1 2 3 4 5 6 Frequency [Hz] 7 8 9 10 Figure 11: Square wave amplitude spectrum 3.3.2 Modified Sine Wave Conversion In figure 12 a modified sine wave conversion can be seen. It is an improvement in comparison to the square wave conversion. Instead of just two levels and a 50 % duty cycle it uses three levels. The Modified Sinus Wave 1 Voltage[V] 0.5 0 â0.5 â1 0 0.2 0.4 0.6 0.8 1 Time [s] 1.2 1.4 1.6 1.8 2 Figure 12: Modified sine wave conversion The Matlab code to create figure 12 and 13 can be seen in appendix A.2.
