Thanks for your reply Kremmen!
I will answer in order:
-I planned on using MOSFETs and read that the base of them couldn't switch at the rate I am planning to do it. Since I am using a PIC18F2550 that works at 48MHz CPU speed and the PWM I use to switch the IGBT gate is at 100us to emulate the sine wave.
100us is actually quite OK for a MOSFET, no problem at all. You just need to pick a suitable MOSFET. It is actually the IGBT that is slow; their internal structure has built in features that cause a slow turn-off. That's why you don't find IGBTs in high frequency switching circuits, whereas you do find MOSFETs.
The speed of your MCU is irrelevant if you are using a gate driver such as the IR2110 to control the actual gate. IR has plenty of app notes for the IR2xxx family, just google and you wil find them.
-Yes, it is a single-phase induction motor. I got it from a LG washer machine great state. I got it for free and here in Perú DC brushless motors are really expensive and can't even talk about getting one from another country. I am designing the full brige it is just that the IR2110's Datasheet just shows the half bridge and I am trying to understand how it works so that I can design the full bridge.
Please make very sure what you actually have. As far as i understand, modern washers do _not_ use induction motors. They are either brush universal motors or brushless DC motors that are actually 3 phase AC motors. If you can provide a photo, it will clarify.
In any case a washer motor is... well. Like using a cannon to shoot a fly. It has orders of magnitude more power than you need to spin that little LED contraption. Also potentially dangerous because they are direct off line motors and you maybe would be better off not having that.
-Yes, I just plan to speed the led ring up to a constant speed.
Then you will get by with a very, very much smaller motor.
I will try to find one DC brushless motor but in that case how can I calculate the HP that it will require? Sorry I know this is a mechanics question and will ask somewhere else also but if anyone has any idea it would be great.
Its OK, i do a lot of that
In this case the power you need is only that needed to overcome bearing and air friction. There is no traction load at all. If the ring is well balanced and you have good bearings (like say the shaft ends in a needlepoint resting on a hard bearing cup), the power will be almost nothing, a few watts at most. So even a small toy motor could probably pull this off. The motor does not by any means have to be a _brushless_ motor. That is an unnecessary complication because brushless motors are very complex to control compared to brush motors.
I really aprecciate your help.
De nada. Happy if i can help.