Typically, an 18KW motor would be too large to be single phase because then the windings' conductors will be too large inorder to carry such high currents. I,myself,don't think such a motor exist since a cheaper 3phase motor could be used instead.
Single phase motor winding is often checked just by listening to the noise that the motor is making. An experienced person can tell if the motor is working at single phase or double phase.
A three-phase motor will not start if one or two phases aren't connected. If while running one or two phases "drop out", it will continue to run for awhile, but will eventually burn out, unless connected to a motor saver.
There is no such thing as 3 phase to a DC motor. DC is direct current and is totally different from AC. 3 phase only exists in AC or Alternating Current
No. That would be a single phase motor.
The difference between a single phase and a three phase motor is the amount of power conductors that feed the device. As to the other part of the question a three phase motor will not start or run on single phase. The phase angles on three phase are 120 degrees apart on a single phase system they are 180 degrees apart.
The motor cannot be altered to work on single phase power. You will either have to put in a new single phase motor or use a phase convertor box. Do a google search for phase convertor - you will find plenty.
its simple: its either single phase or three phase connection
In star connection when two phase is short,it work as single phase system. In delta when one phase is open ,it work as a single phase.
You will need to install a phase converter or change the motor to single phase. You can find a licensed electrician at www.contraxtor.com
how reversing an ac single phase induction motor to wark as induction generator
Use VFD to make 3 phase from single phase source.
Single phase Induction motor