i have an oldish 3 phase 2hp motor i want to use for a project, i want to use a vfd inverter so i can both run it from 240v ac and also vary the speed
I have a few questions perhaps someone could help with;
The plate on the motor doesn’t mention if it’s delta or star, a look at the connections shows that there are 3 wires plus earth so i am pretty sure its delta as believe although it’s not absolutely necessary there
is nearly always a 4th wire for neutral in a star config. it has a starter control that i think probably starts it in star and runs it in delta. The resistances between terminals are comparable at about 7 ohms. Is it a fair assumption that it is a delta?
it’s rated for 415 volts. do you think this refers to the phase to phase voltage and therefore 240 would be sufficient? this diagram refers to both 415 and 230, although its a star configured motor.
Does anyone have a recommendations for a cheap, reasonable VFDs? i think i am leaning towards a huanfang chinese vfd, not the cheapest but lots seem to be used for home made cnc machines to control the spindle speeds, there is lots of online support and they are remotely controllable via rs485 which might be useful for future use.
see below for pictures of the motor plate, wiring and starter controls.
any help is very much appreciated