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.Questions. 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?
Good question CJCUK Maybe Dr Sparky can help. Also Leonardo David could have some insights.
Also, we have several posts and articles that could be helpful.
I would recommend you buy #usr249883
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