Active Member
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[China]
Address: B Blding,Huangpu Runhe Industrial Park, Zhentou Road,Huangpu Community, Shajing street, Bao'An District Shenzhen P.R.C
Contact name:Lau
Shenzhen Dowis Electronics Co.,Ltd |
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Shenzhen Dowis Electronics Co., Ltd. is a professional manufacturer of electronic transformers, inductors, and filters integrating R&D, production, and sales. It is a national high-tech enterprise and has passed the IATF16949:2016 automotive industry quality management system certification, the product has passed the "UL""CQC" and other safety certifications. The products are widely used in communication equipment, new energy vehicles, industrial control equipment, high-power LED drives, and other market areas. The industry has high visibility. In addition to the domestic market, but also exported to many countries in Europe and the United States.
In order to further expand production capacity, it has set up a special test area construction area in Zhaoqing YueGui cooperation in 2018 of 14000 square meters of manufacturing center named ZhaoQing Sheng Xiang electronic technology co., Ltd. Its management technical team has rich experience in cooperating with customers from well-known domestic enterprises and overseas. The design of products can fully follow customer’s needs and services with a good quality control system, and it has been recognized by many famous enterprises as the core suppliers. We look forward to cooperating with you.
1. Drawing (Unit: mm)
2. Winding Structure
3. Process of Winding
| winding | Barrier tape | Pin | Wire & Description | TS | Winding Method | Groove position | Insulating Tape (light yellow) | Tube | method of entering Axle | Direction of Axle | |||||
| Top | Pin Side | Start | End | Start | End | Tape Type | TS | Start | End | ||||||
| N1 | 4 | 3 |
∮0.40mm*1P 1UEW-F | 16 | Tightly wind 1 layer | P4 Groove | Between P3&P4 | W7.8 | 1 | / | / | Pin towards Left | Front | ||
| N2 | 3 | NC |
∮0.20mm*2P 1UEW-F | 14 |
Tightly wind 1 layer, start from the top *Pin3 is temporarily hung in the top groove. After winding, cut off the NC end and then hang the top lead on PIN3 (i.e., NC at the PIN end) | Between P3&P4 | Hanging | W7.8 | 3 | / | / | Pin Towards Left | |||
| N3 | (B) | (A) |
∮0.65mm*1P TIW-B | 7 | Evenly wind 1 layer | Bottom | Top | W7.8 | 3 | 20L*22 | 20L*30 | Pin Towards Left | |||
| N4 | W1.5*1TS | W1.5*1TS | 2 | (5) | ∮0.20mm*2P 1UEW-F | 5 |
Tightly wind in the middle | Between P2&P3 | Between P4&P5 | W7.8 | 1 | / | 24L*10 | PIn Towards Right | |
| N5 | 3 | 1 |
∮0.40mm*1P 1UEW-F | 15 |
Tightly wind in the middle | Between P3&P4 | Between P1&P2 | W7.8 | 3 | / | / | Pin Towards Left | |||
4. Electrical Specification
| Item | Test Terminal | Test Condition | Standard Requirement | Equipment | |||
| semi-manufactured goods | Manufactured goods | OC Exam | |||||
| Inductance Test | 4 | 1 | 100KHz, 0.1V | 285~315µH | 280~320µH | 300µH±8% | TH1062 or equal |
| Leakage Test | 4 | 1 | 100KHz.0.1V (short connection N2,N3,N4) | 10µH max | 10µH max | 10µH max | TH1062 or equal |
| Direct Current Resistance | 4 | 1 | DC 25℃ | 0.5Ω max | 0.5Ω max | 0.5Ω max | TH2511 or equal |
| 2 | 5 | 85mΩ max | 85mΩ max | 85mΩ max | |||
| A | B | 25mΩ max | 25mΩ max | 25mΩ max | |||
| Turns Test | All winding | 20KHz, 1V | 31:7:5 (±0.2Ts) Pin4,5,B homopolar | CH3250 or equal | |||
| High-Voltage Insulation Test | A (flywire) | Pin 1+2 | AC-50Hz-3mA | 4500V, 1sec | 4500V, 1sec | 4000V, 60sec | CJ2670 or equal |
| Pin 1 | Pin 2 | 1800V, 1sec | 1800V, 1sec | 1500V, 60sec | |||
| Pin 2 | Core | 500V,1Sec(Alarm is qualified) | |||||
