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參數(shù)資料
| 型號： | AN-18 |
| 英文描述： | TOPSwitch Flyback Transformer Construction Guide |
| 中文描述： | 回掃變壓器的TOPSwitch施工指南 |
| 文件頁數(shù)： | 28/32頁 |
| 文件大?。?/td> | 275K |
| 代理商： | AN-18 |
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AN-18
A
7/96
28
DESCRIPTION
Core Type, Material,
Part #
Bobbin Type,
Part #
Number of Primary Turns
Number of Secondary Turns
Number of Bias Winding Turns
Primary Wire Size
Secondary Wire Size
Bias Winding Wire Size
Core Gapped Inductance
Coefficient
Primary Inductance
Reinforced Insulation
Tape Width
Basic Insulation
Tape Width
Margin Tape Width
Sleeving Size
CELL #
-
-
D45
B30
D46
D56
D67 (See Text)
See Text
C47
D44
B27
See Text
B28
N/A
VALUE
EF20, Siemens N67
Part# B66311-G-X130
EF20, 10 PIN, Siemens PIN
B66206-A 1110-T1
94 turns
9 turns
9 turns
32 AWG
26 AWG Triple Insulated
24 AWG
205 nH/T
2
±
5%
1829
μ
H +/-10%
N/A
12.0 cm
N/A
N/A
TRIPLE INSULATED WIRE TRANSFORMER CONSTRUCTION
PARAMETERS FROM TABLE 6 SPREADSHEET
Table 8. Construction Parameters for Triple Insulated Wire Design Example.
SYMBOL
-
-
N
P
N
S
N
B
AWG
AWG
S
AWG
B
A
LG
L
P
BW
M
-
Secondary Wire Size
From cell ( B66) of the Table 6 spreadsheet, a secondary bare
wire area of 540 circular mils is required to make the secondary
CMA equal the primary CMA. From cell (D67), the closest
AWG wire size that can satisfy this requirement with a single
wire is calculated as 22 AWG. This wire size is too large for use
at 100KHz, and several smaller parallel wires should be used
instead to allow full utilization of the wire cross-sectional area.
From the wire table in Appendix A, it can be seen that two
parallel strands of 26 AWG triple insulated wire (CM of 252.8
circular mils per wire) have a total bare wire area of 505.6
circular mils, which is within 10% of the required CM of 540
circular mils. The current capacity of the parallel winding can
be calculated from the formula:
CMA
N
CM
I
S
SRMS
=
×
CMA
is the current capacity of the secondary winding in
circular mils per ampere, N is the number of strands in the
secondary winding, CM is the bare area of a single secondary
conductor in circular mils (from the wire table in Appendix A),
and I
SRMS
is the secondary RMS current from cell (D62) of the
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