jimraysr
Member
50 / 60 Hz
Many Electrical items have been rated for both 50 or 60 HZ and yes they run slower on 50 HZ. As I recall they were de-rated when running on 50 HZ. 2 pole motors should be 3600 RPM on 60 HZ, but are generally listed as 3450 RPM. 4 pole motors should be 1800 RPM but are listed at 1725 RPM and finally 6 pole motors 1150 RPM rather than 1200 RPM.
By the same logic, 50 HZ motors would run at 3000, 1500 and 1000 RPM synchronous speed. I have no experience with 50 HZ motors.
Much of the South American power grid was (and maybe still is) 50 HZ (or 50 cycle as was the common term)
It sounds like in fact that there are 3 phase RC controllers which could operate a three phase alternator if it has the current capacity.
Do the sensorless three phase RC motors have 6 leads?
The whole point of poly phase motors is to come closest to having a continuous push like DC motors have. Three phase motors see three lines feeding them and the sign wave of each phase is 120 degree apart. It is getting three pushes on each revolution. A washer or cooler motor (swamp box for desert rats for cheap cooling) has only one phase in it, but most have a start capacitor which gives the start winding a 2nd push with a phase shift from the capacitor and it is taken out of the circuit by a mechanical switch or a relay operated by back EMF operating a relay. Permanent split capacitor motors have a 2nd capacitor which is connected all the time to the aux. winding which is the same as the start winding. They may or may not have a starting circuit.
I am throwing all this AC motor stuff in here as it does apply if one was to motorize a three phase alternator. Electrical laws are universal and not subject to interpretation by a judge. )
Jim
Many Electrical items have been rated for both 50 or 60 HZ and yes they run slower on 50 HZ. As I recall they were de-rated when running on 50 HZ. 2 pole motors should be 3600 RPM on 60 HZ, but are generally listed as 3450 RPM. 4 pole motors should be 1800 RPM but are listed at 1725 RPM and finally 6 pole motors 1150 RPM rather than 1200 RPM.
By the same logic, 50 HZ motors would run at 3000, 1500 and 1000 RPM synchronous speed. I have no experience with 50 HZ motors.
Much of the South American power grid was (and maybe still is) 50 HZ (or 50 cycle as was the common term)
It sounds like in fact that there are 3 phase RC controllers which could operate a three phase alternator if it has the current capacity.
Do the sensorless three phase RC motors have 6 leads?
The whole point of poly phase motors is to come closest to having a continuous push like DC motors have. Three phase motors see three lines feeding them and the sign wave of each phase is 120 degree apart. It is getting three pushes on each revolution. A washer or cooler motor (swamp box for desert rats for cheap cooling) has only one phase in it, but most have a start capacitor which gives the start winding a 2nd push with a phase shift from the capacitor and it is taken out of the circuit by a mechanical switch or a relay operated by back EMF operating a relay. Permanent split capacitor motors have a 2nd capacitor which is connected all the time to the aux. winding which is the same as the start winding. They may or may not have a starting circuit.
I am throwing all this AC motor stuff in here as it does apply if one was to motorize a three phase alternator. Electrical laws are universal and not subject to interpretation by a judge. )
Jim