深圳宝博洛科技有限公司

We use laser machines to remove paint and solder flat coils.

The magnetic permeability of an inductor is a physical quantity that represents the magnetic conductivity of a material. It plays an important role in inductance, which is mainly reflected in the following aspects:
• Determine the self-inductance coefficient of the inductor: The higher the magnetic permeability, the greater the magnetic field strength generated in the inductor. Under the same current change, the greater the change in magnetic flux, and thus the greater the self-inductance coefficient. For example, when making a high-frequency transformer, a ferrite material with a higher magnetic permeability is selected as the magnetic core to obtain a larger inductance to meet the circuit’s requirements for inductance.
• Influence on the energy storage capacity of the inductor: The ability of the inductor to store magnetic field energy is related to the magnetic permeability. Materials with high magnetic permeability can store more magnetic field energy under the same current and number of coil turns. In some circuits that require energy storage, such as energy storage inductors in switching power supplies, high magnetic permeability materials are needed to achieve efficient energy storage.
• Change the operating frequency characteristics of the inductor: Materials with different magnetic permeabilities will cause the inductor to exhibit different characteristics at different frequencies. Generally speaking, high permeability materials can provide larger inductance in low frequency bands, but in high frequency bands, due to hysteresis loss, eddy current loss and other reasons, the inductance performance may decrease. Low permeability materials may perform better in high frequency bands. For example, in RF circuits, air-core inductors (permeability close to vacuum permeability) or ceramic inductors with low permeability are often used to avoid excessive losses and performance degradation at high frequencies.
• Used to screen electromagnetic shielding materials: In situations where electromagnetic shielding is required, high permeability materials can be used to guide magnetic lines of force and confine the magnetic field to a certain area, thereby reducing electromagnetic interference. By selecting materials with suitable permeability, components such as inductors can be effectively electromagnetically shielded, improving the stability and reliability of the circuit.

Our engineering team designed three inductors for a project for a client in Spain,Nov 22nd 2025

Bobbin EE1667 for india customers and shipped in 7th May 2025

Power switches made from wide-bandgap semiconductor materials such as silicon carbide or gallium nitride are now widely used in power converters. The high-speed switching characteristics, along with the low reverse recovery charge of SiC transistors or the zero reverse recovery charge of GaN HEMTs, enable designers to create smaller and more efficient power systems than silicon-based alternatives.

However, despite all the advantages of GaN and SiC, these switch types are still somewhat exotic compared to the tried and trusted silicon MOSFETs or IGBTs. Reference and demonstration designs such as the GaNdalf II (2 kW bridgeless totem-pole PFC stage) and GaNSTar (500 W LLC converter) boards developed by Future Electronics can provide a useful blueprint for designers undertaking their first GaN and SiC power switch-based projects.

Now, Future Electronics’ Power Systems Design Lab in London has implemented a SiC-MOSFET-based design for a 3 kW LLC power supply that steps down a nominal input of 390 VDC to a nominal output of 49 VDC.

Because the SiC MOSFETs switch at a fast switching frequency of 250 kHz, this new SoniC demo design board can save about 30% of total space compared to a 3 kW silicon MOSFET-based design, where the maximum switching frequency is typically no more than 100 kHz. The faster switching performance of the SoniC board allows the use of smaller magnetic components and capacitors.

The design team’s approach was based on the principle of using standard off-the-shelf components or (in the case of the transformer) conventional designs that any small to medium OEM can easily produce at low cost. The design also avoids less conventional magnetic assembly methods, such as copper tape on the secondary or planar magnetic designs and structures.

3 kW LLC converter design for mass market

The board’s bill of materials (BOM) consists of components that are available to OEMs through distribution channels:

Four Onsemi NTH4L045N065SC1650-V SiC MOSFET switches on the primary side, with a typical on-resistance of 45 mΩ at 15 V gate-source voltage

Four Onsemi NCD57000 primary-side isolated high-current gate drivers

A wound bobbin and core transformer and separate wound bobbin and core independent resonant inductors

Onsemi’s off-the-shelf NCP4390 LLC controller — an advanced pulse frequency modulation (PFM) controller for LLC resonant converters using charge control technology for synchronous rectification

Eight Onsemi FDMT80080DC 80 V MOSFETs driven by four Onsemi NCP51530 half-bridge drivers and four NCP4308 synchronous rectification controllers

Using 250 kHz The SiC MOSFETs with a high switching frequency can use a much smaller resonant inductor and transformer than a 3 kW converter based on silicon MOSFETs.

Amorphous alloys are a new type of alloy material that emerged in the 1970s. They are formed by rapidly cooling and solidifying liquid metal, resulting in a ribbon-like material with short-range order and long-range disorder. Heat treatment of this amorphous alloy can produce crystals with diameters of 10-20 nm (uniformly distributed within a matrix of the amorphous material), known as nanocrystalline materials.
From a process perspective, nanocrystals are obtained by heat treating amorphous alloys, and the matrix of the nanocrystalline is still amorphous. Therefore, most literature often discusses amorphous and nanocrystalline materials together. Currently, amorphous (nanocrystalline) materials can be divided into four categories: iron-based amorphous, iron-nickel-based amorphous, cobalt-based amorphous, and nanocrystalline. 1. Iron-Based Amorphous
Iron-based amorphous materials are primarily composed of iron, silicon, boron, and carbon. They are characterized by strong magnetic properties, with saturation magnetic induction reaching approximately 1.4-1.7 T. They are also inexpensive and are suitable for replacing silicon steel sheets in applications with frequencies below 10 kHz. 2. Iron-nickel based amorphous materials are mainly composed of iron, nickel, silicon, boron, etc. Its saturation magnetic induction intensity is about 1T and its magnetic permeability is high. It can be used to replace silicon steel sheets and Permalloy and is often used in transformer related products.
Cobalt-based amorphous materials
Cobalt-based amorphous materials are primarily composed of cobalt, silicon, and boron. Other elements may be added to meet specific performance requirements. Their saturation magnetic flux density is around 1 T, and their permeability is high. They are generally used in demanding products and can replace ferrite. However, due to the presence of the rare metal cobalt, they are very expensive. 4. Nanocrystals: Nanocrystals are composed of iron, silicon, boron, and small amounts of copper and niobium, with copper and niobium being the key raw materials for nanocrystals. They are first processed into amorphous ribbons, then heat-treated to produce a hybrid material of nanocrystals and amorphous materials. Nanocrystals offer superior performance and are relatively inexpensive, making them widely used in various high-frequency transformers and inductors.
In terms of application, amorphous (nanocrystalline) materials operate in the frequency range of 50 Hz to 100 kHz. They possess excellent magnetic properties: high magnetic flux density, high initial permeability, high resistivity, high residual magnetic flux density, low coercivity, and low high-frequency losses, making them a magnetic material with exceptional overall performance. The main advantages of amorphous (nanocrystalline) materials in transformers and common-mode inductors are as follows:
1. High effective permeability, requiring fewer turns for equal inductance and resulting in a smaller size;
2. Fewer turns, resulting in lower distributed capacitance;
3. Low coercivity and loss;
4. High Curie temperature and excellent stability;
5. Excellent frequency characteristics, effectively handling noise spikes. Amorphous (nanocrystalline) materials significantly improve the efficiency of transformers and inductors, reduce size, weight, and energy consumption, and are therefore currently widely used in high-power switching power supplies, inverters, UPS power supplies, charging stations, automotive electronics, and power monitoring.

The sales lady was very busy on weekends. When the customer needed an inductor urgently, she sacrificed her precious weekend time, dared to make breakthroughs, and delivered the inductor to the customer in time.

A competitive team can meet the needs of customers beyond expectations and then improve itself. I believe there is no such motivated and aggressive team in the market. This is our secret weapon to defeat our peers.

With the continuous improvement of computing power, the amount of data transmitted through various connections is increasing exponentially, and the demand for information processing in data centers has surged to support the rapid development of technologies such as large models and artificial intelligence.
💚 Under such market development trends, semiconductor processors such as CPUs, GPUs, and FPGAs are constantly optimized in manufacturing processes and rapidly developing towards miniaturization, with significantly enhanced data processing capabilities. Driven by the continuous improvement of the capabilities of these core processors, the power supply circuits that match them have also undergone tremendous changes.TLVR in power supply circuits
🧡 Advanced processors are moving towards smaller sizes, resulting in lower power supply voltages used in them, but the current consumed has increased significantly, and the power consumption of advanced processors has been rising. Many industry manufacturers predict that power consumption will become the biggest constraint on the further development of advanced computing.One of the problems caused by low voltage and high current characteristics is how the power supply circuit responds to rapid load fluctuations. In a circuit where the voltage is already very small, it is very difficult to maintain a stable and reliable voltage output under large current load fluctuations.
💚 In order to meet the needs of today’s advanced processors for power circuits, TLVR is a very common circuit configuration for dealing with rapid load fluctuations in low-voltage and high-current applications, that is, power supply voltage regulation across inductors. The principle is to use the coupled inductor secondary winding to connect a series tuned inductor to increase the coupling current, thereby quickly increasing the transient current response speed.
💙 In the TLVR circuit configuration, each phase switch is connected to an inductor with an additional winding, and then the winding of each phase and the compensation inductor are connected in series to form a loop. The TLVR configuration greatly improves the power supply capability, enabling these advanced processors to achieve higher transient response performance, while reducing power loss, and also reducing overall size and system cost.Inductors for TLVRIn TLVR, the selection of inductors is very critical, which greatly affects whether the power supply configuration can meet the performance requirements of today’s data-driven applications. TLVR power inductors can provide critical regulation capabilities to the circuit, maintain continuous current by accumulating and releasing energy, and can provide high current and high inductance for power supply systems of different voltage levels.

🧨 The most primitive inductor is the iron core coil used by British M. Faraday to discover the electromagnetic induction phenomenon in 1831. In 1832, American J. Henry published a paper on the self-induction phenomenon. People call the unit of inductance Henry, abbreviated as Henry. In the mid-19th century, inductors found practical application in devices such as telegraphs and telephones.

🎈 The inductors used in experiments by H.R. Hertz of Germany in 1887 and N.J. Tesla of the United States in 1890 are both very famous, known as Hertz coils and Tesla coils, respectively. If a current flows through an inductor, it will attempt to maintain the current when the circuit is disconnected.

Sometimes customers buy my products not because of the low price or the thoughtful and considerate service. Different customer groups have different reasons and preferences for purchase. Some young friends will buy our products because of the differentiated packaging. Some even buy them not because the cakes are delicious, but because of the beautiful and cute candles on the cakes. We can only know the customers’ little thoughts by observing the details.

Customer received our samples and test in 27th April 2025

In the dream, I was arguing with my partner. He approved a product made by a 60-year-old uncle relative, which was substandard. I said this was disrespectful to the client and irresponsible. He replied that it was fine since cost-cutting and efficiency were in vogue. I told him that with a saving mindset, you would be far from wealth. Alone at the seaside, I felt inexplicably downcast and happened to run into an old female investor. I shared everything with her, but then I woke up, and tears kept flowing.

• My name is Ruby Chen, born and raised in Hunan Province, China.
• I am of Han ethnicity,
• I love electronics and business design and investing, I love making friends and traveling.
• I also love my family and my sweetheart.
• From component manufacturing to consumer electronics design,
• we are doing our best to do this and attract more and more customers
• to us. Products are designed by top engineers and
• have their own patents and global market certification certificates.
• I am an electrical engineering graduate, enjoying my first taste of designing and manufacturing hardware. My first circuit board was a very low-speed microcontroller board, using mostly DIP and through-hole components, like something from the 80s. It is easy to convert a breadboard to a PCB using these packages, but they are large, and the cost per square inch is very high for project boards running in the single digits. To keep costs down, I designed a board using only SMT components, which is more compact (and more complex) than any other board I have made before. I wanted to verify as much as possible that my design would work before making the board, so that I would not waste my limited budget and have to postpone the making of a new board.
• Our company has in-depth cooperation with LG of South Korea, providing SMD OEM services for inductors. Since the cooperation started in December 2018, the compound annual growth rate has exceeded 17%. It has been widely recognized and supported by magnetic component customers.

Infineon Technologies AG, based in Munich, Germany, is launching a 12kW reference design for a high-performance power supply unit (PSU) designed for AI data center and server applications. It is targeted at R&D engineers, hardware designers, and developers of power electronics systems. The reference design is said to leverage all relevant semiconductor materials: silicon (Si), silicon carbide (SiC), and gallium nitride (GaN), delivering high efficiency and power density.
“In pursuit of the ever-increasing energy demands of AI, Infineon’s contribution is to provide power solutions with the highest conversion efficiency to conserve every watt,” said Richard Kunčič, Senior Vice President and General Manager of Power Switches at Infineon. “Our new 12kW high-power-density PSU reference design employs an advanced power conversion topology, leveraging CoolMOS, CoolSiC, and CoolGaN. This enables the PSU to unleash its full potential in energy efficiency, reliability, and power density.”

太陽光発電インバータ用インダクタ部品とその技術動向
太陽光発電インバータにおけるインダクタの重要性とは？簡単に言えば、「エネルギーの輸送体」です。インダクタがなければ、直流から交流への変換は機能しません。近年、太陽光発電産業が活況を呈し、インバータ技術も圧倒的な進歩を遂げていることに気づいていますか？重要な部品であるインダクタも、より大きなプレッシャーにさらされています。
かつては、インダクタンスさえあれば十分でした。しかし、今は違います。
変換効率が高く、損失が少なく、温度安定性が求められます。シリコン鋼、フェライト、アモルファス材料、ナノ結晶材料… 材料の種類はますます広がっています。私たち大中電子は、東莞で30年以上事業を展開しており、電力用変圧器、インダクタ、リアクトル、電源アダプターなどを製造しています。私たちはこの分野に精通しています。高周波化がトレンドです。インバータのスイッチング周波数は上昇しており、インダクタもそれに追いつかなければ、そのニーズに追いつくことはできません。鉄損、銅損、そして熱管理。どれも容易ではありません。
何が起こっているのでしょうか？私たちは材料選定に細心の注意を払っています。アモルファス材料やナノ結晶材料など、高い磁気伝導性と低損失性を備えた材料を広く大量に使用しています。生産ラインでは、全自動巻き取りと真空含浸を採用しています。
塗装とは、簡単に言えば、職人技によって性能が損なわれないようにすることです。
そして、サイズの問題もあります。家庭用インバータは近年小型化が進んでいますが、出力を下げてはなりません。インダクタも小型化する必要があり、高出力密度は必須条件です。
最近、お客様が「価格」について尋ねることはほとんどなく、「温度上昇はどれくらいですか？」「全負荷時の寿命はどれくらいですか？」といった質問をされることが増えていることに気づいていますか？これは、業界が真に成熟したことを示しています。
信頼性についてお話しましょう。太陽光発電所は25年間稼働させる必要があり、インバータは途中で故障してはいけません。熱設備
絶縁処理や腐食防止といった細部への配慮が不十分であれば、遅かれ早かれ問題が発生します。なぜ大中電子はプロフェッショナルと言えるのでしょうか？それは、インダクタの冷却風路のシミュレーションまで行っているからです。
エージングテストは、何度も繰り返され、ついには失敗に終わりました。
次にカスタマイズです。今日では多くのインバータメーカーが独自のトポロジーを設計しており、インダクタもそれに応じて調整する必要があります。開発プロセスにおける迅速な対応と協力体制が、パートナーシップ構築の可否を決定づけるのです。

Los convertidores CC-CC existentes tienen un ciclo de trabajo estrecho

(1), lo que reduce en gran medida la eficiencia de conversión, por lo que se requiere un convertidor CC-CC que pueda lograr una conversión de alta eficiencia sin depender de la diferencia de potencial de entrada/salida. Por esta razón, Murata es un POL delgado.
(2) Desarrollamos este producto para reducir significativamente la dependencia del tamaño del inductor y lograr una alta eficiencia en aplicaciones como reguladores, módulos de transmisión óptica que requieren montaje de alta densidad, potencia central y ASIC/FGPA. , existen restricciones en cuanto al área de montaje y la altura. Tecnología única de bomba de carga
Además del innovador método de circuito de dos etapas que combina

(3) y el circuito convertidor CC-CC existente, se utiliza un método entrelazado de dos fases

(4) para lograr una alta eficiencia del 89%. ). El rango de voltaje de entrada es de 3,0 V a 3,45 V y la corriente de salida se puede entregar a cada dispositivo a 12 A. El voltaje de salida se puede ajustar entre 0,35 V y 0,7 V dependiendo de la resistencia de retroalimentación externa.