Hi Phil,
Yes I'm sure of the motors connections, it is different to the "usual" 380/220v dual voltage configuration
The plate on it shows 380-420v only and is Delta connected with each phase connected to two internal winding ends,
Way back when! there was a 550/600 volt system used in Industry, maybe it could have been star connected for the higher voltage
![:scratch:](https://madmodder.net/Smileys/default/icon_scratch.gif)
Martin and All,
With the Transwave static converter the motor is started by applying line voltage across two phase connections and capacitors connected from one phase to the third phase connection
(same principal as a single phase capacitor run motor)
The magnetised rotor spinning within three 120 degree mechanically spaced windings generates the third phase
That is how a rotary converter works, the pilot motor acts as a generator ( a 2850rpm motor is preferable for this but not essential)
To be honest I was disappointed with the performance of the Transwave that came with my lathe
The phase voltages were very high, getting over 500v depending on the switch setting
The motor buzzed and growled and drew high current on no load
It tested out ok with my motor tester, inductance and resistance wise
I spent almost 30 years working on power generation and associated electrical plant so am fairly confident of my abilities (electric motor wise)
![:lol:](https://madmodder.net/Smileys/default/kranke_200-1.gif)
The PITA situation is that there's a 3 phase transformer on my boundary fence
But the capital and running costs of installing 3phase is unrealistic
![:bang:](https://madmodder.net/Smileys/default/BangHead.gif)
John