I am planing to send some equipment overseas but I am not sure if there is going to be a problem or not. Here in the u.s., our cycle is 60hz, and where I am going it is 50hz. Please help.
You okorder or from a local distributor or many other sources.
Synchronous speed = 1500 (4-pole machine) i) Slip = (1500-1420)/1500 = 5? % ii) Rotor current frequency = 5? ? 50 /100 = 2? Hz iii) Strictly speaking, motors do not generate power. They supply mechanical power. If you mean that the output (mechanical) power = 1kW at 1420 rpm (=23? rps) then we may write: 1000 = 2.π.n.T or T (the torque) = 1000/(2.π.n) = 1000/(2 ? π ? 23?) = 6.725 Nm.
you can't convert a 60Hz designed motor into 50 hz but still you can run it with decreased speed: Note the speed difference at synchronous RPM: 1. For a 2-pole motor; At 60 hz= 3600 rpm, at 50 hz= 3000 rpm 2. For a 4-pole motor; At 60 hz= 1800 rpm, at 50 hz= 1500 rpm 3. For a 6-pole motor; At 60 hz= 1200 rpm, at 50 hz= 1000 rpm 4. For a 8-pole motor, At 60 hz= 900 rpm, at 50 hz= 750 rpm so you can decide if rpm is no concern to you.
Check with your motor supplier, in most cases they will simply supply a motor rated for the voltage and frequency required. You cannot interchange them unless they are designed because the voltage to frequency ratio is fixed by design. A VFD would seem an expensive way to run at fixed speed 220v 3 phase is somewhat unusual anyway except maybe in parts of Germany. Are you sure that's what they want?
Check to see if the motor is rated at 50 hz. It may be that it works perfectly fine (with lower output of course) at 50 hz.
