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Generator design

Generator design

Generator design

(OP)
Can anyone help me with a formula?  I need to calculate the force required to move the piston of a linear generator from one position to the other.  Specs currently are: 9 kW output at 409 V peak (240 vrms), stator comprised of 188 x 2mm E punchings in a circle to form a cylinder 12 cm diameter, dimensions of E's is 5cm x 5cm coil spaces, 1.46 cm steel width.  Armature made of 4 NeFeB permanent magnets with total face area of .00553 sq m and rated 1.2 Tesla.  Winding 2 coils ea 2152 turns #20 magnet wire connected "4 in hand", e.g. 4 parallel.

So my question is, will my estimated 597 Newtons force on the piston be able to move it off position TDC onto position BDC?

Thanks for any input.

Pechez les vaches.

RE: Generator design

This is a very specialized application. A modern machines text might cover this, or you may need to find a book on linear machines. Also you might try searching IEEE for articles on linear generators.

http://ieeexplore.ieee.org/

RE: Generator design

Why don't you just build the thing and hook it up to a dummy load and a dynamometer?

Mike Cole, mc5w@earthlink.net

RE: Generator design

(OP)
alehman:  Thanks for pointers.  Unfortunately no joy on IEEE site, my search there found nothing.

mc5w:  Agreed, that looks like only way.  Was hoping there might be some math to pre-design with first but apparently not.

Pechez les vaches.

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