Author Archive: ruby

PFC inductors design

Posted on by

I. The Design Background of 3000W PFC Inductor
Input voltage range: 85 – 265 VAC
Full power: 3000W
PFC architecture: The most common type is the three-phase interleaved Boost PFC (approximately 1000 watts per phase)
Operating frequency: 65 – 100 kHz (Si MOSFET) or 130 – 200 kHz (SiC/GaN)
From this, it can be concluded that:
The peak current of each phase inductance can reach over 10-15A. Both core loss and copper loss cannot be ignored, and a balanced approach must be adopted.
The inductive current contains a distinct DC component (high DC biasing capability is crucial)
II. Selection of Core Materials
At the 3000W level, the magnetic core material must possess high DC biasing capability, low loss, and controllable temperature rise. The comparison of several mainstream materials is as follows:
Iron Silicon Aluminum (Sendust)
Saturation magnetic flux density: 0 – 1 T
Advantages: Strong DC bias, low loss, EMI-friendly
Disadvantages: Low magnetic permeability, more turns are required
Applicable: 3000W three-phase interleaved, 65-100kHz per phase
2.High-Flux (Fe-Ni)
Saturation magnetic flux density: 0 – 1.5 T
Advantage: It can withstand a greater current than iron, silicon, and aluminum, and has a smaller volume.
Disadvantage: High cost
Applicable to: High peak current, high power density design

 

Automotive electronic control module (ECU/BCM/gateway board)

Posted on by

Automotive electronic control module (ECU/BCM/gateway board): The silicon-based life in motion, with functional safety defining the driving baseline
Automotive electronics are a symbiotic entity of code and steel. AEC-Q100 is merely the admission ticket, while ISO26262 ASIL-D is the gauge of the soul. What we design is not a single board, but an “electronic organ” that can maintain absolute logical clarity even under extreme electromagnetic, mechanical, and temperature stress.
Construction of technical barriers:
·ASIL-D level functional safety architecture: The main control unit employs a lock-step multi-core MCU, such as TI TDA4VM or NXP S32G, with built-in ECC memory and redundant computing units. The power system achieves full-path redundancy, even if a single DC-DC path (such as
The TPS65381 component has failed, but the backup circuit can still seamlessly take over without any interruption in the voltage output.
· Microscopic battle of electromagnetic compatibility (EMC): PCB adopts a design with more than 10 layers of HDI, strictly distinguishing analog, digital, RF and power grounds. For high-speed networks such as CAN-FD and vehicle Ethernet (100BASE-T1), precise 100Ω differential impedance control is implemented, and the radiation emission (RE) is suppressed below the CISPR 25 Class 5 limit through simulation. · Thermal management and mechanical reliability: For the high temperature of 125°C in the engine compartment, high thermal conductivity aluminum substrates and heat dissipation copper column through-hole arrays are used. The key BGA components are filled at the bottom (Underfill), and through FEA simulation verification, the fatigue life of the solder joints exceeds 15 years under 50G mechanical impact and 20Grms random vibration.
·Hardware isolation of the security gateway: The gateway motherboard utilizes multi-core SoC and hardware virtualization technology to achieve physical isolation of the infotainment domain, vehicle domain, and power domain within a single chip. Data exchange is encrypted through the hardware-accelerated MACsec engine, with a throughput of over 1 Gbps and a latency of less than 10 μs.
Shenya Electronics takes functional safety as its leading principle, ensuring that every automotive PCB assembly becomes a reliable node that complies with the ISO 26262 standard. #Intelligent Manufacturing #Embedded Systems #PCB #Industrial Automation

An inductors

Posted on by

An inductors

is a component that can convert electrical energy into magnetic energy and store it. The structure of an inductor is similar to that of a transformer, but it has only one winding. An inductor has a certain inductance, and it only impedes changes in current. If the inductors is in a state without current passing through, when the circuit is connected, it will try to prevent the current from flowing through it; if the inductor is in a state with current passing through, when the circuit is disconnected, it will try to maintain the current unchanged. Inductors are also known as choke coils, reactors, and dynamic reactors.

Insamhladh oibre ionduchtóir cumhachta!

Posted on by

Is iad ionduchtóirí cumhachta na príomhchodanna i mórán feidhmchlár cumhachta íseal-minicíochta, amhail i soláthairtí cumhachta lasctha agus tiontairí DC-DC.
Nuair a chuirtear ionduchtóir le chéile le lasc leathsheoltóra ardchumhachta a oibríonn ag minicíocht shonrach, is féidir leis an voltas aschuir a mhéadú nó a laghdú. Cuireann an voltas réasúnta íseal agus an tomhaltas cumhachta ard ceanglais an-ard i bhfeidhm ar dhearadh an tsoláthair cumhachta, go háirithe don ionduchtóir. Agus an ionduchtóir á dhearadh, ní mór fachtóirí ar nós an mhinicíocht lasctha, an sruth rátáilte, agus an timpeallacht ardteochta a chur san áireamh.
De ghnáth bíonn croí maighnéadach ag ionduchtóirí cumhachta chun a luach ionduchtais a mhéadú, rud a laghdaíonn an riachtanas maidir le minicíochtaí arda agus méid beag á choinneáil acu. Laghdaíonn an croí maighnéadach cur isteach leictreamaighnéadach le gléasanna eile freisin. Ní féidir ach foirmlí anailíseacha garbha nó foirmlí eimpíreacha a úsáid chun an impedance a ríomh, mar sin le linn chéim an dearaidh, tá gá le hinsamhladh ríomhaire nó tomhas.

Los inductores moldeados integrales

Posted on by

Los inductores moldeados integrales (también conocidos como inductores moldeados integrados o inductores moldeados) han ganado una gran popularidad en el mercado de componentes electrónicos en los últimos años. Las principales razones de esto se deben a los siguientes aspectos:
P 1. Ventajas estructurales: Mayor estabilidad y fiabilidad
El inductor moldeado de una sola pieza integra la bobina y el polvo magnético mediante el proceso de moldeo, evitando problemas como aflojamiento, desprendimiento y daños por vibración que pueden ocurrir en la estructura tradicional de inductores de montaje superficial de “bobinado + núcleo + encapsulado”.
Estructura sin huecos: El interior del cuerpo del inductor está densamente relleno, con excelente conducción térmica y alta resistencia a la tensión mecánica.
Alta fiabilidad: Especialmente adecuado para entornos con altas temperaturas, altas vibraciones y encapsulado de alta densidad (como electrónica automotriz, control industrial, etc.). 2. Excelente rendimiento eléctrico: Alta corriente, bajas pérdidas
Alta capacidad de conducción de corriente: La estructura general del imán ofrece una excelente disipación de calor y no es propensa a la saturación, lo que le permite soportar corrientes de trabajo más altas.
Baja resistencia a la CC (DCR): La combinación optimizada de bobinado y polvo metálico reduce la pérdida de energía y mejora la eficiencia.
Excelente rendimiento de supresión de EMI: La estructura de moldeo integrada ofrece un alto nivel de blindaje y puede suprimir eficazmente las interferencias electromagnéticas.
III. Proceso de fabricación avanzado, apto para la producción automatizada y compatible con la soldadura automática: La mayoría de los inductores integrados se presentan en encapsulado SMD estándar, adecuado para el proceso de producción SMT.
Alta consistencia y alto rendimiento: El proceso de moldeo reduce la influencia de factores humanos, lo que resulta en una mayor consistencia dimensional.
IV. Ampliamente aplicados y en línea con las tendencias de la industria. En diversos campos, como la gestión de energía, la electrónica automotriz, la comunicación 5G y la electrónica de consumo, los inductores moldeados integrados son la opción preferida:
Fuente de alimentación para vehículos: Resistente a altas temperaturas y humedad, cumple con los requisitos de la certificación AEC-Q200.
Teléfonos inteligentes, portátiles y tabletas: La demanda de miniaturización y alta eficiencia ha impulsado su adopción.
Servidores y módulos de alimentación: Existe una fuerte demanda de escenarios de alta densidad de corriente.

What is an inverter?

Posted on by

What is an inverter?
An inverter is a device that converts direct current (DC) to alternating current (AC). It is widely used in various electrical appliances. An inverter consists of an inverter bridge, control logic, and filtering circuits.

It can convert DC energy (such as from batteries or storage batteries) into fixed-frequency and fixed-voltage or variable-frequency and variable-voltage alternating current, typically in the form of a 220V, 50Hz sine wave.

Inverters are widely used in various scenarios such as in households, industries, and automobiles, for example, to power air conditioners, home theaters, power tools, lighting, and other equipment.
In photovoltaic systems, the inverter plays a crucial role.
The photovoltaic inverter can convert the direct current generated by the photovoltaic cells into alternating current at the frequency of the power grid, for off-grid or grid-connected use.

It not only has the conversion function, but also possesses special functions such as maximum power point tracking and islanding effect protection. It is a key device in the photovoltaic power generation system.

SMD Inductors unshield and shield inductors

Posted on by

The shielded patch inductor is a common electronic component that is widely used in various circuits.
It has the functions of shielding external interfering signals and providing a stable current.
This article will, from the perspective of a profound analysis of the product, introduce the principle, application scope and future development trend of shielded surface mount inductors.
The principle analysis shows that the shielded surface mount inductor is composed of a coil and a ferrite chip, and is externally covered with a shielding cover.
Its principle is to achieve the shielding of high-frequency signals through the self-inductance of the coil and the magnetic coupling of the ferrite chip.
When a high-frequency signal passes through the shielded patch inductor, an induced current will be generated in the coil, thereby blocking out external stray signals.
2. Application scope: The application of shielding patch inductors is widely seen in fields such as communication equipment and consumer electronics.
In communication equipment, shielded patch inductors are used for interference filtering, power isolation and other functions, which can improve signal transmission quality and reduce interference.
In consumer electronic products, shielding patch inductors are used in modules such as mobile communications and wireless networks to provide a stable power supply and ensure the normal operation of the devices.
3. Future Development Trends With the continuous advancement of technology, the shielding patch inductor is also evolving.