Hidraulic Motor vs Electric Motor VFD driven
Hidraulic Motor vs Electric Motor VFD driven
(OP)
Hello friends,
I would like to know how to make correct electric motor power calculation when you replace a hidraulic motor with one electric vfd driven.
If we have 7 KW 300 RPM load requirements: Can I use a 750 RPM(8 poles-50 Hz) motor and decrease the speed up to 300 rpm ( 20 Hz), then for constant torque aplication calculate the new KW at 750 RPM like KW = 7 x 750/300 = 17.5 KW?
Thanks for the inputs
petronila
I would like to know how to make correct electric motor power calculation when you replace a hidraulic motor with one electric vfd driven.
If we have 7 KW 300 RPM load requirements: Can I use a 750 RPM(8 poles-50 Hz) motor and decrease the speed up to 300 rpm ( 20 Hz), then for constant torque aplication calculate the new KW at 750 RPM like KW = 7 x 750/300 = 17.5 KW?
Thanks for the inputs
petronila





RE: Hidraulic Motor vs Electric Motor VFD driven
Gunnar Englund
www.gke.org
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100 % recycled posting: Electrons, ideas, finger-tips have been used over and over again...
RE: Hidraulic Motor vs Electric Motor VFD driven
RE: Hidraulic Motor vs Electric Motor VFD driven
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If we learn from our mistakes I'm getting a great education!
RE: Hidraulic Motor vs Electric Motor VFD driven
I heartily second the suggestion for a gear-box.
Bill
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"Why not the best?"
Jimmy Carter
RE: Hidraulic Motor vs Electric Motor VFD driven
Thanks for the inputs
A 8 pole motor and a gearbox are spensive, then I will propouse a solution including a 4 pole vfd driven motor with a load beltdriven with pulleys witha 1:2 ratio
Carlos