Advantages of Closed Slot Stamping vs Open Slot Stamping
Advantages of Closed Slot Stamping vs Open Slot Stamping
(OP)
Hi Guys,
Recently i came across an information that some manufacturers of Submersible Motors use Closed slot Stamping design in Higher kW ranges over the conventional Open slot stampings. The disadvantage of a closed slot stamping will be the delay in production as it may take upto couple of days to completly sew the coil on its core.
I wonder what could be the advantage of the Closed Slot stamping motor over the one with conventional Open Slot Stamping? Can anyone throw me some light on this issue.
Recently i came across an information that some manufacturers of Submersible Motors use Closed slot Stamping design in Higher kW ranges over the conventional Open slot stampings. The disadvantage of a closed slot stamping will be the delay in production as it may take upto couple of days to completly sew the coil on its core.
I wonder what could be the advantage of the Closed Slot stamping motor over the one with conventional Open Slot Stamping? Can anyone throw me some light on this issue.





RE: Advantages of Closed Slot Stamping vs Open Slot Stamping
Typical arrangement is semi-enclosed stator slot for random wound windings (allows enough room to feed coils in conductor by conductor) and open stator slot for form wound windings.
Open slot is the only way to get that form wound winding in.
Closed slot has advantage to reduce slot harmonics. It also affects magnetic circuit design in subtle ways I'm not that up on.
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(2B)+(2B)' ?
RE: Advantages of Closed Slot Stamping vs Open Slot Stamping
RE: Advantages of Closed Slot Stamping vs Open Slot Stamping
Benefits (as mentioned above) are reduced torque ripple and also reduced need for magnetization current, as the effective air gap becomes shorter. Also rotor surface losses will be reduced, meaning slightly higher efficiency
Basically more or less same effect can be achieved with magnetic slot wedges, which I think is much more common solution with form-wound windings
RE: Advantages of Closed Slot Stamping vs Open Slot Stamping
http://en.partzsch.de/closed-slot-coils