Recent content by J_B

Ok, thanks a lot for this. Very helpful. So its possible, but not efficient. How would the losses manifest itself? As heat in the wall of the vessel?

Hi again, I haven't been able to get this one out of my head - the reason for doing this is to transfer power into a pressure vessel without using a bulkhead/fittings to gain access into the vessel. For complete reliability/integrity. I have attached a drawing that shows two 3-phase...

Even if the set-up could be the same as a transformer but the core forms part of the metal barrier? Does a transformer core need to be insulated from anything metallic around it?

Hi folks, This is probably a fairly basic question with a fairly easy answer. I was wondering if you could use the concept of inductive power transfer using a copper coil on each side of a metal barrier? If that metal barrier was a non-magnetic alloy. I have attached 2 drawings showing 3...

I'm trying to see if I can open and close a flow valve. Just need to work out how much force I can get out of an appropriate linear actuator run off 2 or 3 CT's.

NascentOxygen, Now what? Now I will try to calculate what torque I can achieve from this secondary micromotor to see if I can do anything with it. Or what force I can generate from a linear actuator (lead screw torque calc) Windadct, Thanks for this - good info. J_B

If I had a CT on 2 of the phases only driving a 2 phase AC micro motor, would it work given that the primary source is 3 phase? They would be 240 degrees out and the 120 degrees out I suppose?

Psparky, Thanks for your input. I'm not trying to get free power - I just want to know if it's feasible and worth looking into. I'd like to drive a micro linear actuator from a 5kv, 140 amps 3 phase circuit via 3 current transformers. Something like this...

Windadct, I hadn't seen your last post before replying my last post (I'm on my phone). I don't actually have details of the CT yet as I haven't begun designing it. But I have the details of the primary 3 phase circuit.

If 2 of the lines have a break in them, but the source is "on" what will happen at the motor? Nothing because current can't flow in one phase only? Or would the one phase that is still good burn out? I can't go into too much detail about what I want to achieve at this stage as I want to find...

Thanks for the info guys. Could you point me in the direction of some calculations that would allow me to work out the power available to the secondary motor given that I know the voltage and current of my primary lines. In a 3 phase induction motor, are the phases connected at the motor in...

Windadct, Thanks a lot for this. Would it even work for a particularly high power primary motor driving a very small secondary micro motor?

Hi folks, I'm a Mech Eng who is trying his hand at some Electrical design so please forgive my ignorance. My set-up is as follows: I have a 3 phase source powering a 3 phase induction motor. If I then went half way along my power cable and put a separate current transformer on each of the...