Ronnie Sullivan
Member
I went to a job yesterday where they wanted me to speed up a motor.
The motor is a 4KW 3 ph 1440 rpm with a gear box attached.
It at present runs direct online - with no mechanical speed control.
The machine is a (Chinese copy) pillow maker
Sheets of foam are fed into a cutting machine that cuts it into foam chunks, this is then transported on a short belt that go into a second cutter that shreds the chunks into small pieces. (Then onto the pillow filling part)
The 1st cutter and belt are on inverters to control the size of the chunks and shredded chunks.
But like always - they want more production from the machine.
If they speed up the first 2 motors (faster blades - faster conveyor belt)
The shredding motor cant cope and does not shred the foam properly.
So they want me to speed up the final shredding motor using an inverter so they can sync everything.
The motor is Chinese 380V 50HZ (currently running on 415V and has done for years)
I don't know what HZ they will want to run at (neither do they) I'd take a guess about 70HZ
What are the problems running a motor at this overspeed for a few hours at a time?
Anything I should take into consideration?
Thanks
The motor is a 4KW 3 ph 1440 rpm with a gear box attached.
It at present runs direct online - with no mechanical speed control.
The machine is a (Chinese copy) pillow maker
Sheets of foam are fed into a cutting machine that cuts it into foam chunks, this is then transported on a short belt that go into a second cutter that shreds the chunks into small pieces. (Then onto the pillow filling part)
The 1st cutter and belt are on inverters to control the size of the chunks and shredded chunks.
But like always - they want more production from the machine.
If they speed up the first 2 motors (faster blades - faster conveyor belt)
The shredding motor cant cope and does not shred the foam properly.
So they want me to speed up the final shredding motor using an inverter so they can sync everything.
The motor is Chinese 380V 50HZ (currently running on 415V and has done for years)
I don't know what HZ they will want to run at (neither do they) I'd take a guess about 70HZ
What are the problems running a motor at this overspeed for a few hours at a time?
Anything I should take into consideration?
Thanks