Hi I'm working on designing a variable frequency drive for a class project. My initial thoughts were to use use 120VAC, rectify by means of a halfwave rectifier, and then invert using mosfets. I've got some IRF610 mosfets that I was going to use to build my h-bridge with. I went with the halfwave rectifier over the fullwave due to issues i saw when trying to bias the mosfets.
I've been using ltspice for my circuit simulation and it seems to work, but I know that simulation and the actual circuit functionality are not always the same. I plan on using dual element fuses on the incoming ac line rated for 4 amps, and fast acting fuses on the h-bridge. I'm building this run a .02HP motor rated for 1.4 amps.
I had thought about using a transformer on the input to keep the circuit isolated from main power, but I am unsure if it is necessary since one could just unplug the unit to service it.
A gate driver for the mosfets would probably be the optimal way to since I wouldn't have the wasted power when keeping the transistors closed. The gate driving transistors are probably necessary; i just had them there for symmetry. The transistors will then be driven by a PWM signal that I'm writing the code for.
I'm a little new to circuit design so my circuit probably needs a good amount of work. Any advice is greatly appreciated. Thanks!
I've been using ltspice for my circuit simulation and it seems to work, but I know that simulation and the actual circuit functionality are not always the same. I plan on using dual element fuses on the incoming ac line rated for 4 amps, and fast acting fuses on the h-bridge. I'm building this run a .02HP motor rated for 1.4 amps.
I had thought about using a transformer on the input to keep the circuit isolated from main power, but I am unsure if it is necessary since one could just unplug the unit to service it.
A gate driver for the mosfets would probably be the optimal way to since I wouldn't have the wasted power when keeping the transistors closed. The gate driving transistors are probably necessary; i just had them there for symmetry. The transistors will then be driven by a PWM signal that I'm writing the code for.
I'm a little new to circuit design so my circuit probably needs a good amount of work. Any advice is greatly appreciated. Thanks!
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