I have a 1 HP 3 phase power hacksaw. I have several 3 phase motors to choose from. 1/2 hp to 3 HP. Maybe higher if I dig some more. Is it best to match HP? Thanks.
RRT,
is your 1hp motor failing? or are you wanting to try to do a motor swap for some other reason?
On a direct 3Ph setup you can put what ever you like since the motor is 3Ph and the incoming line is 3Ph.
example: if you had a 220 setup. the 220 doesn't care what you put on it and neither will the 3Ph. however as you go up in Hp
so will the amperage draw. a supply cable or breaker change might be in order.
However if your using a VDF driver. then first I would consult the manual for your particular device. but in general I would say
its ok to go =< the rated Hp for such device but never more than.
Then you have the equipment. I would also say if the equipment was engineered correctly. the motor that ships with it
should be the telltale for the targeted/desirable Hp.
best!
Sam
I have a 1 HP 3 phase power hacksaw. I have several 3 phase motors to choose from. 1/2 hp to 3 HP. Maybe higher if I dig some more. Is it best to match HP? Thanks.
RRT;60793 I am not changing the motor on the power hack. I was trying to determine the best HP for the extra 3 phase motor used in converting single phase 220 to 3 phase for the power hack. Oh said:RRT,
Sorry, Im a little confused... you also say your "not changing the motor".
Sounds to me like your considering/wanting to change out the PH(power hack) motor for perhaps a better setup using one of the motors you already have?
but all your motors are 3 phase?
So you will need either 3Ph source , or a Phase convertor or a VFD.
and then how to choose? which motor.
If your considering a VFD. the VFD chosen will clearly state the voltages/amperage conversions for 3Ph motor in question.
Im not an EE but i think in general it doubles or gets cut in half depending on which way you look at it.
Also, if you have the 220 source thats what I would stick with. but you could even drop down to 110/115 as a source. if you went with the 1Hp.
after that I think 220 will be the standard for any motors >1hp. (in general). also I know theirs some loss in amperages when converting. But Im pretty sure
the VFD eats up the losses on the source side. not the motor side so 1hp=1Hp, and 2hp=2hp. so no loss on the motor side.
So I think its safe to say that a 1Hp 3phase setup with 3 phase as its source is the same as a 1hp 3phase using a VFD with 220 as a source is pretty much the same result 1Hp.
I hope I hit the target!
Sam
Here you have "several" 3 phase motors...
RRT,
Sorry, Im a little confused... you also say your "not changing the motor".
Sounds to me like your considering/wanting to change out the PH(power hack) motor for perhaps a better setup using one of the motors you already have?
but all your motors are 3 phase?
So you will need either 3Ph source , or a Phase convertor or a VFD.
and then how to choose? which motor.
If your considering a VFD. the VFD chosen will clearly state the voltages/amperage conversions for 3Ph motor in question.
Im not an EE but i think in general it doubles or gets cut in half depending on which way you look at it.
Also, if you have the 220 source thats what I would stick with. but you could even drop down to 110/115 as a source. if you went with the 1Hp.
after that I think 220 will be the standard for any motors >1hp. (in general). also I know theirs some loss in amperages when converting. But Im pretty sure
the VFD eats up the losses on the source side. not the motor side so 1hp=1Hp, and 2hp=2hp. so no loss on the motor side.
So I think its safe to say that a 1Hp 3phase setup with 3 phase as its source is the same as a 1hp 3phase using a VFD with 220 as a source is pretty much the same result 1Hp.
I hope I hit the target!
Sam
Sam, he wants to build a RPC...and is asking what motor to use.