Lecture 18 AC synthesis I

Lecture 18 AC synthesis I - Lecture 18: DC-AC Inverters and...

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Lecture 18: DC-AC Inverters and Low Frequency AC Synthesis
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2 Applications Inverters as Amplifiers Four quadrant operation Interface of renewable resources UPS, variable frequency power sources AC Motor Drives Utility applications – power flow control, power quality Power Amplifiers – Ex: Switch mode audio amplifier diode rectifier switch-mode inverter ac motor 60 Hz source EEE 498/591 – Raja Ayyanar
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3 Different Switching Schemes Square wave, pulse-width controlled Selective harmonic elimination Sinusoidal pulse width modulation (SPWM) Space vector PWM Multilevel converters high frequency and line frequency EEE 498/591 – Raja Ayyanar + + + + o v d V A B AB v
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4 Time 60ms 65ms 70ms 75ms 80ms 85ms 90ms 95ms 100ms V(R1:1) -200V 0V 200V Frequency 0Hz 0.1KHz 0.2KHz 0.3KHz 0.4KHz 0.5KHz 0.6KHz 0.7KHz 0.8KHz 0.9KHz 1.0KHz 100V 300V Square Wave Switching and its Harmonic Spectrum EEE 498/591 – Raja Ayyanar
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5 Time 40ms 45ms 50ms 55ms 60ms V(VOUT+,PWR_SWITCH4:in) V(V4:+)*200 -220V -110V 0V 110V 220V
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Lecture 18 AC synthesis I - Lecture 18: DC-AC Inverters and...

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