| The Breakroom > The Water Cooler |
| Phase Converters ! |
| << < (2/3) > >> |
| RobWilson:
Here we go :bang: A VFD is not what I am looking for ,thought that was clear . I am looking for a larger Rotary Phase Converter to run my shop , As Jo points out I would need 3 VFD's on each milling machine and 2 per lathe . so thats 17 VFD'S in total . Jo, Pete any chance I could please trouble you for a photo of the inside of your Transwave converters ,just interested to see whats inside the box . Cheers Rob |
| awemawson:
A true rotary converter uses the dual wound motor to transform from 240v to 415v, but it is perfectly practical to use a separate transformer for this function, and a pilot motor together doing the same function. Before I moved here and had 3 phase delivered to the door I made several static and rotary phase converters, and also had a couple of Transwave ones which were super reliable. All you need is a transformer, a pilot motor, a voltage sensitive relay and two banks of capacitors (start & run). Capacitors are best to be paper / oil filled and rated at 500v (the voltage sensitive relay 'looks' at the third (generated) phase and switches in / out the start bank of capacitors) |
| RobWilson:
Hi Andrew , Interesting . Did your Transwave use a dual wound motor as a rotary transformer ? from the few photos I have seen on the web of the larger converters, there dose not seam to be a separate transformer . The other supplier I mentioned in post 1 looks to use a separate step up transformer ,similar to whats in my static converter I have now . any pros cons to either method ? To lazy and I dont have the time to make one :palm: Rob |
| inthesticks:
Morning Rob I just dug these out and then read your not interested in building one. I will upload them anyway you may find the 7.5 HP schematic interesting and others may be interested in building their own. Cheers CB |
| awemawson:
Rob, yes both my Transwave Rotary Converters used a dual wound motor to get the higher voltage. I specified '5 wire' output ie 3 phases, neutral and earth, as having the neutral at the machine is often very useful for running 240 volt single phase lights etc between phase #1 and neutral. (You can just add a pilot motor to your current static converter which will allow starting of much larger loads than without it) |
| Navigation |
| Message Index |
| Next page |
| Previous page |