Hello all, In my workshop I have an assortment of motor driven tools - portable and mounted drill, circular saw, grinders. All of these run on single phase AC motors, 220V, 50 Hz. The saw is ~900W and the rest are all of lower rating. There is no speed controller on any of these tools. I work on different materials - wood, aluminum, mild and stainless steel. The operating speeds are different for each. Is it possible to design a single phase VFD to control speed of motors - 220VAC, 1Ph, 50 Hz, 2kW? The designs I've found are controllers for 3 phase motors. I've used triac based controllers, but want something with better control. Thanks, Mohit. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist