more on the deflect-o-meter results
DESCRIPTION
More on the deflect-o-meter results. 6-30-06. Test case is 36.5 kamps/turn Model does not account for the overstocked condition of the winding form/tee. Legs in this model are simple extrusions from the casting. Node 76307. How Deflection is measured (known location). X direction. - PowerPoint PPT PresentationTRANSCRIPT
More on the deflect-o-meter results
6-30-06
Node 76898
Node 76307
X direction
How Deflection is measured (known location)
Test case is 36.5 kamps/turn
Model does not account for the overstocked condition of the winding form/tee.
Legs in this model are simple extrusions from the casting
Locked post
Mounting location
all legs fixed Real Pads-200 uE 0 uE 400 uE 800 UE 400 uE 400 uE
node ux ux ux ux ux ux48970 -3.93E-05 -3.29E-06 9.28E-05 1.27E-04 -4.32E-06 1.71E-0376307 3.91E-04 4.57E-04 6.32E-04 6.68E-04 3.18E-04 2.24E-03
all legs fixed Real Pads-200 uE 0 uE 400 uE 800 uE 400 uE 400 uE
Deflection (mm)
0.429913 0.4599523 0.539362 0.54112 0.3219003 0.5302
.23 mm
movement of the individual nodes (m)
Deflection
ANSYS RESULTS
Deflect-o-meter reading for 36.5 Kamps =
Results revisited with the updated location of the deflect-o-meter
Real Pad updated model showing the deflect-o-meter path
Deflection vs differential strain
0.4
0.42
0.44
0.46
0.48
0.5
0.52
0.54
0.56
-200 0 200 400 600 800 1000
differential strain
De
fle
cti
on
(m
m)
Restraints Again
One post fixed, three posts sliding on a plane
All posts fixed in all directions
In both cases, the left front leg (north-west when viewed from above) is treated as always touching the floor. What if that leg actually moved up and the coil was essentially supported on a tripod.
The magnetic field tends to want to push that leg off the floor (see the red area on the figure on the right). By supporting it as I have here, I am forcing the coil to move and bend to accommodate my displacements, an unwanted effect.
Deflect-o-meter prediction = .54 mm Deflect-o-meter prediction = .32 mm
Picture of how leg is held vertically
It is unclear from this view how the top plate, which is intended to restrict lateral movement, is touching the support vertically or if there is a gap of some size.
Even if the leg is touching the plate, the plate is probably not suitable to restrain all vertical movement
Leg
Top lateral support plate
Letting the north-west leg go (400 µE)
Northwest leg wants to move up and the coil is then supported by three legs
The leg moves up 4-5 mm (vertical)
For 400 uE, the deflect-o-meter ANSYS reading is 0.28 mm
400 µE
Northwest leg wants to move up and the coil is then supported by three legs
The leg moves up 4.5-5.5 mm (vertical)
For 0 uE, the deflect-o-meter ANSYS reading is 0.21 mm
Letting the north-west leg go (0 µE)
0 µE
New Updated Table
0 uE 400 uE Test # 121439 Test # 121453 Test # 121461
Deflection (mm)
0.214 0.285 0.239 0.226 0.232
ANSYS RESULTS (36.5 kamps)
Deflect-o-meter Results (36.5 Kamps)
Simple Linear trend for deflection
0.200
0.210
0.220
0.230
0.240
0.250
0.260
0.270
0.280
0.290
0 50 100 150 200 250 300 350 400 450
Differential strain between winding and shell (uE)
Def
lect
ion
(m
m) Using a simple linear trend (obviously
more points are needed), the results tend to suggest that differential strain may be less than 400 uE.