01-05-2021
9 Slot 6 Pole Motor
Main Question or Discussion Point
# of poles and # of slots, what does it mean? What is the difference between say a 4 pole 12 slot Neu motor and a 6 pole 18 slot Tenshock motor or for that matter 6 pole 9 slot Tenshock all of the same or very similar Kv? To remove ads between posts. Jun 30, 2013, 09:57 PM #2; Knife Liddle.
Often I'm reading on other sites that if a 2 pole 3600RPm (synchronous speed) motor were connected so that the ratio would lower the speed to the same as a 4 pole (2X) and so on with 6 pole (3x) the output HP will remain the same. However the larger the number of poles the larger the motor and like wise the cost! If that were so why would anyone want to buy a more expensive 4 or 6 pole motor if the same HP output were available by gearing or belting a 2 pole motor?
I remember when in High School my father bought a lathe for me but the motor had a bad start winding. It was a 1750rpm 1HP single phase motor. Once started the motor ran fine. Getting it started was the problem and done with a rope to pull start it! I went to Sears back when they had all their stuff made in USA and seen that a 3500rpm, 1HPmotor was half the price of a 1750rpm, 1HP motor so I purchased it and belted it down to the same speed. However it did not have the same power as the replaced 1750rpm motor and could be easily stalled with a heavy cut that would not stall the other motor.
Some time later when in Collage I mentioned it to my Electrical Engineering Professor and he showed me why! Been a Loooooong time ago. Can anyone provide me the calculation similar to his.
Frank
I remember when in High School my father bought a lathe for me but the motor had a bad start winding. It was a 1750rpm 1HP single phase motor. Once started the motor ran fine. Getting it started was the problem and done with a rope to pull start it! I went to Sears back when they had all their stuff made in USA and seen that a 3500rpm, 1HPmotor was half the price of a 1750rpm, 1HP motor so I purchased it and belted it down to the same speed. However it did not have the same power as the replaced 1750rpm motor and could be easily stalled with a heavy cut that would not stall the other motor.
Some time later when in Collage I mentioned it to my Electrical Engineering Professor and he showed me why! Been a Loooooong time ago. Can anyone provide me the calculation similar to his.
Frank
Bldc Motor 9 Slot 6 Pole
36 pole induction motor
36 pole induction motor
Hi There,
I'm in the process of trying to design a 36 pole induction motor for one of our test beds in the factory. It'll be used to test a range of winches that we manufacture and by controlling this motor through a VSD we can perform certain tests without the primary gear box that gets fitted to the completed unit.
I've looked on the web at the various motor manufacturers - a motor of this size (55kW)does not exist as far as I can see, hence my efforts to design a fit for purpose motor.
Despite my best efforts, all I can achieve is a 25kW design, that runs, but with a terrible power factor (copper losses and a huge differential reaction are killing the machine).
My question (eventually) is this: is this a viable proposition in motor design? Should I be looking at a different type of motor (such as a brushless DC or similar)?
Has anybody had any experience with a motor of this size?
Best Regards
I'm in the process of trying to design a 36 pole induction motor for one of our test beds in the factory. It'll be used to test a range of winches that we manufacture and by controlling this motor through a VSD we can perform certain tests without the primary gear box that gets fitted to the completed unit.
I've looked on the web at the various motor manufacturers - a motor of this size (55kW)does not exist as far as I can see, hence my efforts to design a fit for purpose motor.
Despite my best efforts, all I can achieve is a 25kW design, that runs, but with a terrible power factor (copper losses and a huge differential reaction are killing the machine).
My question (eventually) is this: is this a viable proposition in motor design? Should I be looking at a different type of motor (such as a brushless DC or similar)?
Has anybody had any experience with a motor of this size?
Best Regards