Toroidal Standard and Custom Cores
Overview
As always in transformer design the user may vary the main parameters like duty cycle, frequency, induction level and the iron/copper ratio in order to reach specific objectives, or the next larger core size may be selected to accommodate a larger number of secondary windings, high voltage windings, multiple tapings or electrostatic screens. In every case the outcome will be a power rating different from the 60 Hz/15kG power capacity listed in the table.
Going the other way, when used for autotransformers at e.g. 120V/240V step up or step down the power capacity is twice the listed VA rating.
Custom Designs
Cores with custom specified OD, ID and height are available from a fraction of an ounce to 100 lbs or more. If required, please call us at 1-800-836-5920 or send an e-mail to sales@bridgeportmagnetics.com.
Design Information
As always in transformer design the user may vary the main parameters like duty cycle, frequency, induction level and the iron/copper ratio in order to reach specific objectives, or the next larger core size may be selected to accommodate a larger number of secondary windings, high voltage windings, multiple tapings or electrostatic screens. In every case the outcome will be a power rating different from the 60 Hz/15kG power capacity listed in the table.
Going the other way, when used for autotransformers at e.g. 120V/240V step up or step down the power capacity is twice the listed VA rating.
Custom Designs
Cores with custom specified OD, ID and height are available from a fraction of an ounce to 100 lbs or more. If required, please call us at 1-800-836-5920 or send an e-mail to sales@bridgeportmagnetics.com.
Our cores are available in three different configurations. You may order the cores as bare cores, epoxy fluidized or encapsulated in polycarbonate film.
The table below contains basic design information for our standard cores; approximate dimensions and the weight of completed power transformers. It also lists suggested voltage per turn, as well as the estimated voltage drop under load which is useful for calculating secondary windings.
The temperature rise listed is for complete transformers with equally loaded primaries and secondaries, operating at 100% duty cycle.
We stock the following Silicon Steel Toroidal Cores
|
P/N (#) |
ID (in) |
OD (in) |
HT (in) |
BUILD (in) |
Finished / Transformer / Weight (lbs) |
Estimated VA Rating |
V/TURN (@ 60Hz 15kG) |
% (Voltage Drop) |
|---|---|---|---|---|---|---|---|---|
|
0 |
1.375 |
2 |
1 |
0.313 |
0.43 |
46 |
0.077 |
17.5 |
|
10 |
1.5 |
2.375 |
1 |
0.438 |
0.7 |
77 |
0.107 |
11 |
|
20 |
1.625 |
2.875 |
1 |
0.625 |
1.16 |
130 |
0.153 |
8 |
|
30 |
1.75 |
3.25 |
1 |
0.75 |
1.55 |
180 |
0.184 |
6.7 |
|
40 |
1.875 |
3.375 |
1.125 |
0.75 |
1.83 |
233 |
0.207 |
6.3 |
|
50 |
2 |
3.5 |
1.25 |
0.75 |
2.12 |
295 |
0.23 |
6 |
|
60 |
2.125 |
3.75 |
1.375 |
0.813 |
2.7 |
396 |
0.274 |
4.7 |
|
70 |
2.25 |
4 |
1.5 |
0.875 |
3.38 |
522 |
0.322 |
4.5 |
|
80 |
2.5 |
4.375 |
1.5 |
0.938 |
3.98 |
690 |
0.345 |
4 |
|
90 |
2.625 |
4.5 |
1.625 |
0.938 |
4.47 |
824 |
0.373 |
3.8 |
|
100 |
2.75 |
4.875 |
1.625 |
1.063 |
5.42 |
1026 |
0.423 |
3.6 |
|
110 |
3 |
5.25 |
1.75 |
1.125 |
6.69 |
1392 |
0.483 |
3.5 |
|
120 |
3.250 |
5.500 |
2.000 |
1.125 |
8.11 |
1867 |
0.551 |
3.5 |
|
130 |
3.375 |
5.875 |
2.000 |
1.250 |
9.53 |
2237 |
0.613 |
3.3 |
|
140 |
3.500 |
6.125 |
2.125 |
1.313 |
11.06 |
2683 |
0.684 |
3.0 |
|
150 |
3.625 |
6.375 |
2.500 |
1.375 |
14.16 |
3548 |
0.843 |
2.7 |
|
160 |
4.000 |
7.125 |
2.500 |
1.563 |
17.90 |
4909 |
0.957 |
2.5 |
|
170 |
4.250 |
7.375 |
3.000 |
1.563 |
22.45 |
6650 |
1.149 |
2.3 |
|
180 |
4.375 |
8.000 |
3.000 |
1.813 |
27.72 |
8174 |
1.333 |
2.1 |
|
190 |
4.750 |
8.625 |
3.000 |
1.938 |
32.03 |
10300 |
1.425 |
2.0 |
|
200 |
5.000 |
9.000 |
3.500 |
2.000 |
40.38 |
13744 |
1.716 |
1.8 |
|
210 |
5.500 |
10.000 |
3.500 |
2.250 |
50.29 |
18710 |
1.930 |
1.0 |
|
220 |
6.000 |
11.000 |
3.500 |
2.500 |
61.29 |
24740 |
2.145 |
1.2 |
|
L10 |
1.375 |
2.500 |
0.562 |
0.563 |
0.50 |
47 |
0.077 |
14.3 |
|
L20 |
1.750 |
3.250 |
0.750 |
0.750 |
1.16 |
135 |
0.138 |
8.3 |
|
L30 |
2.250 |
4.000 |
1.000 |
0.875 |
2.25 |
348 |
0.214 |
6.5 |
|
L40 |
2.750 |
5.250 |
1.125 |
1.250 |
4.64 |
835 |
0.345 |
4.8 |
|
L50 |
3.000 |
6.000 |
1.375 |
1.500 |
7.65 |
1458 |
0.506 |
3.1 |
|
L60 |
4.000 |
7.000 |
1.500 |
1.500 |
10.20 |
2827 |
0.551 |
3.0 |
|
L70 |
4.375 |
8.000 |
1.750 |
1.813 |
16.17 |
4768 |
0.777 |
2.6 |
|
L80 |
4.750 |
8.625 |
2.000 |
1.938 |
21.35 |
6867 |
0.950 |
2.4 |
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Contact Us for Information and Sales
6 Waterview Drive, Shelton, CT 06484