Registered Users Mitglied

2 speed 3 Phase motors and inverters

I have acquired an old British milling machine with a 2 speed 50Hz 3 phase motor. The ID plate states HP 1.5/1.5 RPM 1420/700 2.2/2.8A continuous rating.
From the above it would seem to be a 4/8 pole induction motor. There being no 3 phase supply available, it is being run on a static capacitive inverter which trips when attempting to run on the higher speed. It's fine on the lower.
1/ Why would the inverter trip/overload when trying to run as 4 pole when the rating plate seems to indicate that a lower amperage would be needed?
2/ Would something like a modern Mitsubishi inverter be able to run the existing motor and if not why?

Verwandt Posts