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WHBD Toroidal Transformer
- Category：Toroidal transformers
- Overview of toroidal transformers The core of the toroidal transformer is a transformer seamlessly rolled from high-quality cold-rolled silicon steel sheets. The coil of the toroidal transformer is evenly wound on the iron core, and the direction o
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Overview of toroidal transformers
The core of the toroidal transformer is a transformer seamlessly rolled from high-quality cold-rolled silicon steel sheets. The coil of the toroidal transformer is evenly wound on the iron core, and the direction of the magnetic field lines generated by the coil almost completely coincides with the magnetic circuit of the iron core. Compared with the laminated type, the excitation energy and iron core loss will be reduced by 25%.Internal structure advantages of toroidal transformers
The core of the toroidal transformer is made of high-quality cold-rolled silicon steel sheets (thickness is generally below 0.35mm), seamlessly rolled, which makes its core performance better than traditional laminated cores. The coil of the toroidal transformer is evenly wound on the iron core, and the direction of the magnetic field lines generated by the coil almost completely coincides with the magnetic circuit of the iron core. Compared with the laminated type, the excitation energy and iron core loss will be reduced by 25%. The toroidal core is wound by silicon steel tape, the toroidal core has a continuous magnetic circuit, and the laminated core transformer has an air gap between the EI sheets; therefore, there is a large air gap and the magnetic resistance is laminated The main disadvantage of transformers. The toroidal core has no air gap, and the electrical noise is much smaller than that of the EI-type and C-type core transformers. The use of vacuum impregnation technology can make the iron core a solid whole without deformation during winding and processing; because the ring-shaped iron core is very strong, vibration and audio noise are reduced.Toroidal transformer fixing method
There are many fixing methods for toroidal transformers, the most common method is to use the center hole of the toroidal transformer to fix. It should be noted that fixing parts such as screws should not ground the top pressure plate and the lower bottom plate of the transformer at the same time, so as not to form a short-circuit ring;Toroidal isolation transformer performance index list
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Toroidal isolation transformer performance index list (some examples) |
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model |
Power ( VA) |
Primary DC copper resistance ( Ω±20% ) |
No-load current ( ≤mA ) |
No-load loss |
Dielectric strength between primary and secondary |
Adjustment rate |
Insulation class |
Full load temperature rise |
Efficiency ( ≥% ) |
|
WHDB-50 |
50 |
35 |
15 |
1.5 |
3.5/60S |
10.5 |
B |
35 |
88 |
|
WHDB-100 |
100 |
15.5 |
25 |
2.5 |
3.5/60S |
8.5 |
B |
40 |
89 |
|
WHDB-200 |
200 |
6.2 |
35 |
4.5 |
3.5/60S |
7 |
B |
50 |
90 |
|
WHDB-500 |
500 |
1.9 |
45 |
7.5 |
3.5/60S |
5.5 |
B |
65 |
92 |
|
WHDB-1000 |
1000 |
0.85 |
80 |
12 |
3.5/60S |
5 |
B |
75 |
93 |
Common specifications and dimensions of toroidal (type) isolation transformers
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Ring (type) isolation transformer model list (some examples) |
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power |
All copper ( WHDB series) |
Semi-aluminum ( WHDB-L series) |
All aluminum ( WHDB-2L series) |
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Dimensions |
Installation hole distance |
Dimensions |
Installation hole distance |
Dimensions |
Installation hole distance |
|
|
100VA |
54×98 |
78×78 |
55×100 |
78×78 |
55×103 |
78×78 |
|
200VA |
65×108 |
90×90 |
66×110 |
90×90 |
72×113 |
90×90 |
|
320VA |
72×127 |
105×105 |
73×128 |
105×105 |
75×130 |
105×105 |
|
400VA |
77×133 |
105×105 |
78×135 |
105×105 |
82×135 |
105×105 |
|
500VA |
79×138 |
115×115 |
85×140 |
115×115 |
90×140 |
115×115 |
|
800VA |
91×148 |
130×130 |
93×150 |
130×130 |
97×155 |
130×130 |
|
1000VA |
97×157 |
130×130 |
100×165 |
130×130 |
102×165 |
135×135 |
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Remarks: Dimensions can be customized according to customer requirements, please contact customer service & call: |
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