Audio amplifier transformer cores
The iron core of the audio power amplifier transformer is an open structure because of its structure that the two halves are combined to form a closed magnetic circuit.
Product Description
Audio amplifier transformer core
Applied materials: It can stably provide world-class high-quality oriented silicon steel sheet materials (Baosteel, Wuhan Iron and Steel, Shougang, Nippon Steel NSC, Kawasaki JFE, Posco POSCO, Amco AK), optional material thickness: 0.05, 0.08, 0.10mm Ultra-thin silicon steel sheet, 0.1mm super silicon steel, 0.23, 0.27, 0.30mm ordinary or high magnetic induction Hi-B silicon steel sheet.
Structural features: Because the structure is two halves spliced together to form a closed magnetic circuit, it is an open structure. Therefore, the coil can be produced separately from the iron core, and then the coil is sleeved on the iron core, so the production period can be shortened.
Application areas: C-type iron cores of various specifications are widely used in 50Hz, 400Hz transformers, transformers, reactors, inductors, choke coils, and other electromagnetic components in electronic equipment.
Specification range: It can be customized according to customer requirements.
Toroidal cores
1. Physical dimensions: (mm)
| H (Min) | H (Max) | ID (Min） | ID (Max） | OD (Max） |
| 3 mm | 400 mm | 5 mm | 1000 mm | 1200 mm |
2. Processing Method:
| (1) | No cutting, No painting |
| (2) | Not cut, dipped in 1033 paint (heat resistance class 120 degrees) |
| (3) | Not cut, dipped in 4526 paint ((heat resistance class 180 degree) |
| (4) | cut, dipped in 4526 paint ((heat resistance class 180 degree) |
| (5) | Multi-section cutting, dipping 4526 paint (heat resistance level 180 degrees) |
| (6) | With plastic case (pp material, maximum temperature resistance 90 degrees) |
| (7) | Winding polypropylene film (maximum temperature resistance 90 degrees) |
| (8) | Green epoxy resin powder coating (heat resistance grade 180 degrees, usually coating thickness 0.15mm-0.5mm) |
| (9) | Black epoxy resin surface spraying (heat resistance level 180 degrees, usually coating thickness 0.03mm-0.25mm) |
3. Weight calculation
| G(g)=7.65XScXLc | ||
| Remark: Sc(cm2) =[(OD-ID)/2*H*Kc]/100, Core effective cross-sectional area | ||
| Lc(cm)=0.157(OD+ID), Core average magnetic path length | ||
| Kc： Lamination (Duty) Factor | Material | Kc |
| 0.05mm-0.1mm | 0.9-0.94 | |
| 0.23mm-0.27mm | 0.95-0.96 | |
| 0.3mm-0.35mm | 0.97 | |
4. Performance parameters
| Material | Test Frequency | Magnetic flux density (B) | Excitation strength （H) | Saturation magnetic induction （B8) |
| 0.35mm 35Z155 class | 50HZ | 1.7 Tesla | <=50A/m | 1.88 Tesla |
| 0.3mm 30Z130 class | 50HZ | 1.7 Tesla | <=40A/m | 1.88 Tesla |
| 0.27mm 27ZH100class | 50HZ | 1.7 Tesla | <=28A/m | 1.9 Tesla |
| 0.23mm 23ZH100class | 50HZ | 1.7 Tesla | <=28A/m | 1.9 Tesla |
| 0.1mm thin silicon steel | 400HZ | 1.5 Tesla | <=26.5VA/Kg | 1.82Tesla |
| 0.05mm thin silicon steel | 1000HZ | 1.0 Tesla | <=42VA/Kg | 1.75 Tesl |
| Remark:
After dipping paint or epoxy resin spraying, the electromagnetic performance of the iron core will decrease and the loss will increase. |
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5. Application:
Power Transformers, Current Transformer, voltage transformer, Inductor, Regulator, Reactor, choke coil
6. Performance characteristics
(1) High saturation magnetic induction
(2) High permeability
(3) Low loss, the iron loss of the core is equivalent to the iron loss of the material, reducing the temperature rise
(4) Ring structure, low leakage flux, compact iron core, low noise
(5) good stability
Email: sales@cb-magnetics.com
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Tel.: +86 755 2372 9530
Tel.: +86 755 6112 4460
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Add.: #509, Shangxing Building, Hebin South Rd, Xinqiao Town, Bao'an District, Shenzhen City, Guangdong Province, China