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Hi,
I am building an modified sine wave inverter . and I need to know about AC switches. We must use half-bridge switch to make provide ac modified sine wave, but I don`t know what kind of switch is good for it?
For me I would go with IGBT's being they are robustly built, easy to control with a dedicated driver IC and little else, plus they generaly have high voltage ratings and good current handling abilities in a small package and are rather cheap to buy.
For basic ratings I would suggest using something with a 2x volt rating over your peak rail voltages and at least 4x your estimated peak amps you plan on switching so any that are rated at 600 V or higher and 30+ amps should be good enough.
As far as frequency goes 50 Hz is pretty low far as IGBT's are concerned so that wont be a problem with any model you chose.
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