Method and system for determining the number of wedges for a slot in a dynamoelectric machine
A method and system is provided for calculating a number of wedges for a slot in a dynamoelectric machine. The method includes the steps of providing a computer that is programmed to perform a method for calculating, which includes the steps of acquiring a length of the slot, acquiring a length of one or more wedges, and calculating a number of wedges required for the slot. The number of wedges required for the slot is displayed on a display device.
1. A method for calculating a number of wedges for a slot in a dynamoelectric machine comprising:
(A) acquiring a length of said slot;
(B) acquiring a length of one or more wedges;
(C) calculating, using a computer, a number of said one or more wedges required for said slot using the length of the slot and the length of the one or more wedges;
(D) calculating, using a computer, an end spacing distance (L ES ) with the following equation:
L ES =L EP +L CV /2
where,
L EP is an end packet length,
L CV is a cooling vent length; and
wherein, the number of said one or more wedges required for said slot is communicated to a display device and then displayed on the display device.
2. The method according to claim 1 , said method for calculating further comprising the steps of:
acquiring a number of vents in said slot;
acquiring a length of said vents;
acquiring a core length;
acquiring the end spacing distance;
acquiring a middle spacing distance;
calculating a body wedge length using the length of the one or more wedges and the middle spacing distance;
calculating at least one end wedge length using the end spacing distance and the middle spacing distance; and
calculating a number of body wedges required for said slot, using the length of the slot, the body wedge length and the end wedge length.
3. The method according to claim 2 , said method for calculating further comprising the steps of:
calculating a center wedge length, by using the body wedge length and the end wedge length.
4. The method according to claim 1 , said method for calculating further comprising calculating a middle spacing distance (L MS ) with the following equation:
L MS =(( L S −(2 *L ES ))/( N CV −1))
where,
L S is the length of said slot;
L ES is an end spacing distance; and
N CV is a number of cooling vents in said slot.
5. The method according to claim 4 , said method for calculating further comprising a determining step to determine if said number of wedges is an integer value.
6. The method according to claim 5 , said method for calculating further comprising calculating a number of body wedges (N BW ) with the following equation:
N
BW
=
(
L
S
-
L
EW
1
-
L
EW
2
-
L
2
W
1
-
L
2
W
2`
L
BW
)
.
where,
L S is the length of said slot;
L EW1 is the length of an end wedge;
L EW2 is the length of an end wedge;
L 2W1 is the length of a second wedge;
L 2W2 is the length of a second wedge;
L BW is a body wedge length; and
wherein, L 2W1 and L 2W2 are set equal to zero if no second wedges are present.
7. The method according to claim 4 , further comprising a determining step to determine if said number of wedges is an integer value.
8. The method according to claim 7 , said method for calculating further comprising calculating a number of body wedges (N BW ) with the following equation:
N
BW
=
(
L
S
-
L
EW
1
-
L
EW
2
-
L
2
W
1
-
L
2
W
2`
L
BW
)
where,
L S is the length of said slot;
L EW1 is the length of an end wedge;
L EW2 is the length of an end wedge;
L 2W1 is the length of a second wedge;
L 2W2 is the length of a second wedge;
L BW is a body wedge length; and
wherein, L 2W1 and L 2W2 are set equal to zero if no second wedges are present.
9. A system for calculating a number of wedges for a slot in a dynamoelectric machine comprising:
a computer, the computer programmed to perform the steps of:
(A) acquiring a length of said slot;
(B) acquiring a length of one or more wedges;
(C) calculating a number of said one or more wedges required for said slot using the length of the slot and the length of the one or more wedges;
(D) calculating an end spacing distance (L ES ) with the following equation:
L ES =L EP =L CV /2
where,
L EP is the end packet length,
L CV is the cooling vent length; and
a display device for receiving and subsequently displaying the number of said one or more wedges required for said slot.
10. The system according to claim 9 , said computer further programmed to calculate a middle spacing distance (L MS ) with the following equation:
L MS =(( L S =(2 *L ES ))/( N CV −1))
where,
L S is the length of said slot;
L ES is the end spacing distance; and
N CV is a number of cooling vents in said slot.
11. The system according to claim 10 , said computer further programmed to perform a determining step to determine if said number of wedges is an integer value.
12. The system according to claim 11 , said computer further programmed to calculate a number of body wedges (N BW ) with the following equation:
N
BW
=
(
L
S
-
L
EW
1
-
L
EW
2
-
L
2
W
1
-
L
2
W
2`
L
BW
)
.
where,
L S is the length of said slot;
L EW1 is the length of an end wedge;
L EW2 is the length of an end wedge;
L 2W1 is the length of a second wedge;
L 2W2 is the length of a second wedge;
L BW is a body wedge length; and
wherein, L 2W1 and L 2W2 are set equal to zero if no second wedges are present.
13. The system according to claim 10 , said computer further programmed to perform a determining step to determine if said number of wedges is an integer value.
14. The system according to claim 13 , said computer further programmed to calculate a number of body wedges (N BW ) with the following equation:
N
BW
=
(
L
S
-
L
EW
1
-
L
EW
2
-
L
2
W
1
-
L
2
W
2`
L
BW
)
.
where,
L S is the length of said slot;
L EW1 is the length of an end wedge;
L EW2 is the length of an end wedge;
L 2W1 is the length of a second wedge;
L 2W2 is the length of a second wedge;
L BW is a body wedge length; and
wherein, L 2W1 and L 2W2 are set equal to zero if no second wedges are present.