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When customizing magnetic ring inductors, you need to pay attention to the following aspects: 1. Determine the requirements: First of all, it is necessary to clarify the use and requirements of magnetic ring inductors. For example, is it used in power filters, transformers, or other circuits? How to choose the size of the inductor? All of these factors affect the final customization result. 2. Choose the right material: According to the requirements of the magnetic ring inductor, choose the right material. Commonly used materials are ferrite, Ndfeb magnetic powder and so on. Different materials have different characteristics, such as low loss and high frequency performance of ferrite, high permeability and high saturation strength of Ndfeb magnetic powder. Therefore, it is necessary to understand the performance characteristics of the material before customization in order to make the right choice. 3. Positioning size: the size of the magnetic ring inductor is directly related to its quality and service life. In the customization process, the length, width and thickness of the required inductor should be accurately measured, and the total number of turns required should be calculated. At the same time, it is also necessary to consider the heat dissipation problem to ensure that the inductor will not overheat or burn out at the operating temperature. 4. Ensure insulation: magnetic ring inductors are usually composed of multiple coils, and each coil needs good insulation to prevent short circuits and leakage. Therefore, in the process of customization, it is necessary to check the insulation of each coil and carry out the necessary treatment to ensure that the insulation effect is good. In addition, it is also necessary to pay attention to whether the connection between the coils is correct to avoid failures caused by poor contact. 5. Control winding process: The process of winding magnetic ring inductors involves many details, including the order of coil arrangement, the distribution of turns, the direction of winding, and so on. In the customization process, it is necessary to strictly follow the prescribed operating process to ensure that the quality of the winding meets the requirements. At the same time, it is also necessary to test the inductor after winding to ensure that all the indexes meet the design requirements. 6. Pay attention to the heat dissipation problem: the magnetic ring inductor will heat up when working in a high temperature environment, and if the heat dissipation is not enough, the inductor will be damaged. Therefore, it is necessary to pay attention to the heat dissipation of the inductor and take corresponding cooling measures when customizing. Fans and heat sinks can be used to improve the heat dissipation efficiency and ensure that the inductor runs under normal working conditions. In short, customizing magnetic ring inductors is a complex process that requires adequate preparation in terms of determining requirements, selecting suitable materials and positioning dimensions to obtain satisfactory results. At the same time, it is also necessary to pay attention to the insulation and heat dissipation problems to ensure the efficient and stable operation of the inductor.

The magnetic ring inductor consists of a magnetic ring, a coil and a magnetic conductor. A magnetic ring is a toroidal magnet, usually made of ferrite or magnetic nanocrystalline material, with high permeability and low magnetic loss. The coil is wound around the magnetic ring and the current is induced in the magnetic ring by the magnetic field generated by the coil. The magnetic conductor passes the magnetic field to the magnetic ring and converts the measured magnetic field into an electrical signal. Ii. Features: 1, simple structure: magnetic ring inductor is composed of a small number of basic components, simple structure, low manufacturing cost. 2, small size: due to the use of magnetic ring as the core, the size of the magnetic ring inductor is relatively small, suitable for use in limited space occasions. 3, light weight: magnetic ring inductor is made of lightweight materials, light weight, easy to carry and install. 4, high reliability: magnetic ring inductor structure is simple, no mechanical moving parts, so it has high reliability and stability. 5, good linear performance: the current and magnetic field characteristics of the magnetic ring inductor are relatively linear, which can provide accurate measurement results. Third, the working principle: When the current passes through the coil, the magnetic field generated by the coil is induced into the magnetic ring. The permeability and shape of the magnetic ring affect the distribution of the magnetic field. By measuring the magnetic field in the magnetic ring, the amount of current passing through the coil can be determined. The working principle of magnetic ring inductors is based on ampere's law and magnetic induction law. 4. Application: Magnetic ring inductors are widely used in current measurement, magnetic field detection and protection devices in power systems. In power systems, magnetic ring inductors can be used to measure the current in high-voltage lines, detect fault currents, and protect transformers.

The following factors need to be considered when choosing a good quality magnetic ring inductor: 1. Brand reputation: Choosing magnetic ring inductors from well-known brands can improve product quality and reliability. Well-known brands usually have high manufacturing standards and quality control systems, and can provide better product warranty and after-sales service.Magnetic loop Inductor 2. Quality certification: Ensure that the toroidal inductor has passed the relevant quality certification, such as ISO 9001 quality management system certification. These certifications prove that the manufacturer has adopted strict standards and processes in product design, manufacturing and quality control. 3. Specifications and performance: Select the toroidal inductor with appropriate specifications and performance according to your needs. This includes parameters such as inductance, current capacity, frequency range, size and operating temperature. Ensure that the specifications and performance of the toroidal inductor meet the application requirements.High Frequency Transformers 4. Quality Control: Understand the supplier's quality control measures and processes. The supplier should have strict raw material procurement, production process control and product testing to ensure product consistency and reliability.Magnetic Ring Inductor 5. Technical support: Choose suppliers who can provide good technical support. They should be able to provide support such as product selection advice, application guidance and troubleshooting to help solve problems and improve product performance. 6. Reference Evaluation: Refer to other users' evaluation and feedback to understand their experience and performance evaluation of the toroidal inductor. This can help determine the reliability and performance of the product. To summarize, choosing a good quality toroidal inductor requires comprehensive consideration of brand reputation, quality certification, specifications and performance, quality control, technical support and reference evaluation. By choosing a well-known brand, understanding the supplier's quality control measures, and referring to user reviews, you can improve the accuracy and quality of your magnetic ring inductor purchase.

Magnetic ring inductors are a common type of electronic component, and their service life is affected by a variety of factors, including environmental conditions, operating temperature, load type, and the quality of the inductor itself. The following are some considerations that can extend the life of a toroidal inductor:Magnetic loop Inductor Proper use: Ensure that the toroidal inductor is properly connected in the circuit to avoid overcurrent or overvoltage conditions. In addition, make sure the inductor is well fixed and supported to avoid mechanical damage.Rod Inductor Temperature control: The operating temperature of the toroidal inductor should be effectively controlled. Excessive temperatures can lead to degradation or even damage to the inductor. If possible, try to choose inductors with low power consumption and low heat, or control the temperature of the inductors through heat sinks.Flat Inductor Moisture and dust protection: Toroidal inductors should be kept in a dry and clean environment as much as possible. Moisture and dust can affect the performance and service life of inductors. In humid environments, inductors may corrode, while in dusty environments, inductors may short-circuit. Noise Reduction Design: Some toroidal inductors are designed with noise reduction, which can help to reduce the noise of the inductors during operation and thus increase their service life. Quality assurance: When purchasing toroidal inductors, try to choose a brand and model with reliable quality. Good quality inductors will outperform poor quality inductors in terms of service life, performance and stability. Regular maintenance: Regularly check the condition of the toroidal inductor, including whether it is overheated or broken. If any problems are found, they should be repaired or replaced immediately. By following the above steps, you can effectively extend the service life of your magnetic ring inductors and ensure that they will perform well throughout their life cycle.

A high-frequency transformer is a transformer that is capable of operating at high frequencies. While conventional low frequency transformers usually operate at 50 or 60 Hz, high frequency transformers are capable of operating at thousands of Hz or even higher frequencies.Magnetic loop Inductor High frequency transformers have some of the following characteristics: 1. small size: because high frequency transformers operate in the high frequency range, the core and coils it requires can be much smaller, so the size and weight of the transformer can be greatly reduced.Rod Inductor 2. high efficiency: high-frequency transformers work in the high-frequency range, its energy loss is less than that of low-frequency transformers, thus improving the efficiency of energy use. 3. lower temperature rise: due to the lower energy loss of high-frequency transformers, their temperature rise is also relatively low, and can achieve higher power density.Flat Inductor 4. Applicable to electronic equipment: due to the small size and high efficiency of high-frequency transformers, they are widely used in electronic equipment, such as power adapters, electronic inverters, wireless charging and so on. It should be noted that the design of high-frequency transformers is different from that of low-frequency transformers, and more high-frequency characteristics and circuit design factors need to be considered.

A magnetic ring inductor is a type of sensor that uses a magnetic ring (a toroidal core of magnetic material with high permeability) to achieve an inductive effect. It consists of a coil wound around a magnetic ring. When the current through the coil changes, the magnetic field strength inside the ring changes, causing a self-inductive electromotive force inside the coil.Magnetic Ring Inductor The operating principle of the magnetic ring inductor is based on the self-inductive inductance effect. When current passes through the coil, the magnetic field generated inside the coil magnetises the toroid to form a stable magnetic field. When an external magnetic field is applied to the toroid, the state of magnetisation of the toroid changes accordingly, resulting in a change in the magnetic field inside the coil, which generates an induced potential at both ends of the coil. Magnetic ring inductors have the following features and applications: 1. High accuracy: Magnetic ring inductors have high sensitivity and stability to provide accurate inductance measurements.High Frequency Transformers 2. Wide Frequency Range: Magnetic ring inductors are capable of operating over a wide frequency range and are suitable for signal processing at different frequencies.Electronic Components 3. Anti-interference ability: Since the magnetic ring inductor uses magnetic field changes to achieve the measurement, it is less affected by electromagnetic interference and external magnetic fields. 4. Wide range of applications: Magnetic ring inductors are widely used in the fields of power electronics, motor drive, automation control, instrumentation, etc. for measuring physical quantities such as current, displacement, speed, position, and so on.

Electronic components are the basic units that make up electronic circuits and systems. Depending on the nature of their use and function, they can be divided into two main categories: passive components and active components. The following are introduced separately:Flat Inductor 1. Passive components: Passive components are components that cannot amplify and control electrical signals, mainly including resistors, capacitors, inductors, diodes, transient suppression diodes, optocouplers, etc. Passive components are the main components in electronic circuits, basically every electronic circuit needs to use passive components. Magnetic loop Inductor 2. Active components: Active components are components that can amplify and control electrical signals and produce energy directly, mainly including transistors, field-effect tubes, bipolar transistors, amplifiers, operational amplifiers, diodes, optoelectronic devices and so on. Active components are widely used in various types of electronic equipment for power supplies, amplifiers, control circuits and other aspects.High Frequency Transformers Electronic components have an important position in the modern electronics industry and are the basic components of electronic products, which are widely used in various fields such as computers, communications, automobiles, household appliances, medical equipment and aviation, and have become an important part of modern industry. With the continuous progress of science and technology and the rapid development of the electronics industry, the types and uses of electronic components will continue to increase and expand.

Inductors are devices that create and manipulate magnetic fields and are one of the basic devices commonly used in the field of electrical engineering. Because inductors have special functions that cannot be replaced by integrated circuits, such as noise reduction and filtering, frequency selection and transforming signal peaks, they are widely used in power electronics, communications, automation control, medical and other fields.Magnetic loop Inductor The basic structure of an inductor is a part of a conductor coil wound around a magnetic core. When a current is passed through the conductor coil, an electromagnetic field is formed, which has magnetic energy, and it is the charge stored within the inductor, also known as inductance.Rod Inductor The inductance of an inductor is the amount of change in the electrical energy stored in the conductor coil as the current changes. When the current changes, the electromagnetic energy stored in the conductor coil also changes, which results in an electrical potential difference at both ends of the inductor. This potential difference is called the induced potential, which is in the opposite direction to the magnetic field when the current changes. This is a device that uses the laws of electromagnetic induction to store electrical energy. Normally, the inductance of an inductor is determined at the time of design as required. The greater the inductance of the inductor, the greater its ability to store stored energy. Generally, inductors are measured in units of Henry, H. Commonly used are mH and uH. The most common role of inductors in electrical circuits is that of filters. The characteristics of the inductor are used to separate signals of different frequencies, thus achieving a filtering effect.Flat Inductor In addition to storing energy and filtering, inductors can also perform a variety of circuit functions such as transforming peak signals, matching networks and common mode suppression.

Magnetic ring inductors are a common electrical component that consists of a magnetic metal ring and a coil. When a current flows through the coil on a magnetic ring inductor, a magnetic field is created in the ring, which changes the magnetic properties of the ring and causes a certain voltage to be induced in the coil.Magnetic loop Inductor Magnetic ring inductors work by using the principle of electromagnetic induction to induce a current by changing the magnetic flux in the magnetic field. Magnetic loop inductors are commonly used in electronic circuits and communications equipment to measure the strength, frequency and phase of electrical signals in a wide range of applications including low frequency oscillators, amplifier feedback, signal generators, timers, power supplies and more.High Frequency Transformers Magnetic ring inductors offer many advantages: 1. high operating frequency: silicon steel cores have low ferromagnetic losses and low interface impedance, and the operating frequency of well-designed magnetic ring inductors can reach 300Mhz.Flat Inductor 2. High precision: The inductance of magnetic ring inductors is within a certain range, the impedance of which is highly accurate and stable, and can be used in many precision measurement systems. 3. Good stability: magnetic ring inductors are magnetically stable and can be preserved for decades. 4. Lightweight and small: Magnetic ring inductors can be manufactured with some very small magnetic rings, which are small enough to be used in small devices on circuit boards. Overall, magnetic ring inductors are used in a wide range of applications including electronic circuits, communications equipment, automotive electronics, medical equipment, industrial science and technology. Their stable performance, high accuracy and reliability have led to their widespread use in many electronic components.

Magnetic toroidal inductors, also known as toroidal inductors, toroidal inductors, toroidal induction coils, etc., are electronic components used to detect magnetic fields based on the principle of magnetic induction. The magnetic ring inductor works by relying on the permeability of the toroidal ferromagnetic core and the induced potential on the coil to measure the magnetic field.Magnetic Ring Inductor A toroidal inductor consists of a toroidal ferromagnetic core and a coil. The core is usually made of iron, nickel, cobalt and other magnetic materials, and the permeability of the material determines the performance of the inductor. The coil, on the other hand, is usually made of conductive materials such as copper wire. When the magnetic field passes through the toroidal core, its magnetic lines of force pass through the coil, and an induced potential is generated within the coil, the value of which is proportional to the strength of the magnetic field.Rod Inductor Magnetic ring inductors are widely used in meters, computers, communication equipment, robots, automobiles, electromagnetic locks and other fields. Among them, magnetic ring inductor has excellent performance in measuring the strength and position of magnetic field. It is widely used in the field of magnetic field measurement, such as measuring the magnetic field of motors, transformers, and power lines, as well as measuring the geomagnetic field and magnetic resonance imaging.Electronic Components In magnetic resonance imaging, magnetic ring inductors are widely used to detect magnetic field gradients and determine the location and strength of magnetic resonance signals by measuring changes in the magnetic field. In robotics, magnetic ring inductors can be used to measure the end position of a robot, as well as to measure the torque and load of a robot during operation. However, magnetic ring inductors also have their limitations. Factors such as the size and shape of their coils and cores, and ambient temperature can affect their performance. Also, when the magnetic field strength is too high, the core tends to saturate and the coil induces unreliable potential, so a reasonable design of the inductor structure is required to fully utilize its measurement performance. In addition, the characteristic curve of the magnetic ring inductor is nonlinear, and its uncertainty needs to be considered and reasonably corrected. In general, magnetic ring inductors have high accuracy and sensitivity in their measurement range and are widely used for magnetic field measurement, position detection, positioning and measurement. Its performance and accuracy are closely related to the needs of applications in industry, mining and scientific research, and can meet a wide range of measurement requirements.

Magnetic rods are mainly used to filter various fine powders and liquids, semi-liquids containing iron impurities and other substances with can be magnetic, can be used in chemical, food, scrap recycling, carbon black and other fields.Magnetic loop Inductor Magnetic rod inductor coils, also known as R-rod inductors, have a large number of applications in the automotive field, mainly focusing on integrated safety systems, adaptive cruise control systems, anti-collision and anti-collision alarm systems, and communication systems with electronic navigation.High Frequency Transformers The function of magnetic rod inductor coils is mainly to filter noise, prevent other information interference, and ensure the safe operation of the car.Flat Inductor

Magnetic ring inductor is a commonly used inductive component, which relies on the magnetic field of the magnetic ring to achieve the inductance. With the advantages of small size, light weight, stable performance and high reliability, magnetic ring inductors are widely used in electronics, communications, computers, automatic control and other fields.High Frequency Transformers Structure and working principle of magnetic ring inductor A magnetic ring inductor is composed of a magnetic ring and a coil wound on the ring. The magnetic ring inductor works by using the magnetic field generated in the coil to magnetize the ring, which forms a stable magnetic field after magnetization to produce inductance.Flat Inductor Performance of Magnetic Toroidal Inductors Magnetic ring inductors have the advantages of high quality factor, high magnetic induction strength, and large inductance values. Its quality factor is the lossless factor of the component, which means that no energy is lost in the circuit. The magnetic induction strength of a magnetic ring inductor is the strength of the magnetic field in the ring. The higher the magnetic induction strength, the higher the inductance value. The inductance value of a magnetic ring inductor is its important parameter. It is the proportional relationship between the electromagnetic induction strength that can be generated through the magnetic ring inductor and the current that flows through it.Magnetic loop Inductor Applications of Magnetic Toroidal Inductors Magnetic ring inductors are widely used in electronics, communications, computers, automatic control and other fields, such as Power supply filtering: In various power supply circuits, the high frequency noise in the power supply is filtered out by inductive components to make the power supply output smooth and stable. Wireless charging of cell phones: Using the principle of magnetic induction, electrical energy is transferred between the cell phone body and the charger through the magnetic ring inductor to achieve wireless charging. Photographic audio and video equipment: In photographic audio and video equipment, magnetic ring inductors are often used as sound filters to improve sound quality by filtering out excess high-frequency noise in the circuit. Automatic control systems: In automatic control systems, magnetic ring inductors are used as signal transmission components to achieve various automatic control functions through signal conversion and transmission. In short, magnetic ring inductors as a mature electronic components in a variety of electronics, communications, computers, automatic control and other fields have a wide range of applications, for the realization of a variety of electronic equipment, high performance, high efficiency has an important role.

Electronic components are various devices, components and parts used to build electronic circuits and realize signal processing, control and transmission. With the development of modern electronic technology, the application of electronic components is becoming more and more extensive, and has become an important and indispensable part of modern industrial production and science and technology fields. In this paper, we will discuss the uses of electronic components from the following aspects.Magnetic loop Inductor Building electronic circuits The main use of electronic components is to build various electronic circuits, such as analog circuits, digital circuits, power electronic circuits, microelectronic circuits, filter circuits, and so on. These circuits can perform a variety of different functions such as signal processing, signal amplification, signal control, signal transmission, etc. Electronic components can be connected and combined in a specific way to achieve various functions according to the needs of the circuit.High Frequency Transformers Realization of information processing and control Electronic components are an important part of building information processing and control equipment such as computers, communication systems, modern control systems and automation systems. Various components inside a computer, such as CPU, motherboard, memory, hard disk, display, etc., are made up of electronic components. The equipment in the communication system, such as telephone, modem, transmitter, etc., are made up of electronic components. Various sensors, actuators, controllers, etc. in modern control systems and automation systems are composed of electronic components. These devices enable a variety of complex information processing and control functions that improve production and work efficiency.Flat Inductor Realization of energy conversion and regulation Electronic components can also be used to realize energy conversion and regulation, such as power supplies, inverters, inverters, etc. Power supplies can convert AC power into DC power and provide stable and reliable power to various devices through different protection circuits such as voltage regulation and overcurrent. Inverter can convert DC power into AC power, which has an important role in the application of solar, wind and other renewable energy into electrical energy. Inverters can regulate the frequency and voltage of electrical energy, thus realizing applications such as speed regulation and power saving of motors. Application in the field of security and protection Electronic components can also be used in the field of security and protection, such as infrared sensors, radar, thermal imagers and so on. These devices can detect changes in the surrounding environment and objects, and send out corresponding signals to achieve safety protection of the observed area or object. Applications in the medical field Electronic components can also be used in the medical field, such as electrocardiograms, blood glucose meters, blood pressure monitors, etc. These devices can detect the physiological parameters of the human body and output the data to a computer or monitor to help doctors diagnose diseases, predict conditions, and give corresponding treatment plans. To sum up, electronic components have a wide range of applications in modern industrial production, science and technology, communications, computers, automation, medical and other fields. Electronic components not only bring convenience and efficiency to people's production life, but also promote the progress and development of technology and industry.

A high-frequency transformer, a transformer capable of operating in the high frequency range. High frequency transformers are widely used in various applications such as power transmission, electronic devices, medical devices, etc.Magnetic loop Inductor A, the basic definition of high frequency transformer A high frequency transformer is an electronic device made of magnetic material and coils. The most significant difference between it and an ordinary transformer is that it can work in the high frequency range higher than 50 Hz. The basic construction of a high frequency transformer is similar to that of a normal transformer in that it contains two or more coils that are separated by a layer of magnetic material. Usually, the magnetic material layer consists of an iron core or ferrite layer.High Frequency Transformers Second, the working principle of high frequency transformer The working principle of high frequency transformer is the same as ordinary transformer, it can change the voltage ratio between input voltage and output voltage by changing the turns ratio of coils. In the high frequency transformer, many interesting phenomena occur due to the high operating frequency. One of the most significant effects is the eddy current phenomenon. Eddy current is a heating and energy loss phenomenon caused by electromagnetic induction. This effect occurs when current flows in a high frequency transformer. To reduce the eddy current effect, high frequency transformers usually use low resistance coils made of thick copper wire, copper tape and copper foil. At the same time, high-frequency transformers usually use shielding on both sides of the coil to reduce the electromagnetic interference effect.Flat Inductor Third, the application of high frequency transformers High frequency transformers have outstanding performance in applications such as power converters, inverters, plasma generators, x-ray generators, magnetic resonance imagers, televisions and computer monitors. Power converters: High frequency transformers are often used in power converters. The transformer converts the input voltage to a different voltage or frequency. Plasma generators: High-frequency transformers are widely used in plasma generators. A plasma generator is a high frequency power source that generates plasma in a gas for research. X-ray generators: High frequency transformers are used in many medical devices, including X-ray generators. These devices require high voltage pulses, and high frequency transformers can provide this energy supply. Magnetic resonance imagers: High-frequency transformers are used in magnetic resonance imagers to make the current more uniform and stable. TV and computer monitor: High frequency transformers are also widely used in the inverter circuits of flat screen TVs and computer monitors. Fourth, the advantages and disadvantages of high frequency transformers The advantages and disadvantages of high-frequency transformers compared to traditional transformers are as follows. Advantages (1) Compared with traditional transformers, high-frequency transformers are more flexible and can quickly change the input and output voltage. (2) High frequency transformers can provide higher power density, i.e., it can provide higher power output in a smaller space occupied. (3) Due to the use of high frequency, the coils of high frequency transformers can use smaller wire diameters to put more coils into a smaller space, which results in higher efficiency and also reduces losses more effectively. Disadvantages Because high frequency transformers often operate at high temperatures, high frequencies, etc., they require the use of special coils, insulation and materials. This makes the cost relatively high. V. Manufacturing and testing of high frequency transformers The manufacturing and testing of high-frequency transformers is very important. The manufacturing process requires the use of special machines and tools to ensure that the quality and size of the coils are accurate. When testing high frequency transformers, many factors need to be considered, such as the use of coaxial cables, filters and attenuators to ensure that the high frequency transformer works within the intended range.

The use and role of inductors Magnetic ring inductors, flat inductors, magnetic ring inductors, rod inductors Uses : Power inductors 1.Power inductors convert electrical energy into magnetic energy for storage and release, and become an integral part of the voltage conversion circuit. 2.Lower DC resistance, lower AC resistance, improve DC superposition characteristics choke inductor. Purpose 1.Stop high frequency AC current component Increase inductance, reduce DC resistance. 2.Improve inductance, reduce DC resistance.

What is the role of electronic components 1, resistance: its function is to limit the voltage and current through; capacitor: to play the cross-coupling, filtering, isolation through the cross and tuning function.Magnetic Ring Inductor 2, inductor: block AC through DC, block high frequency through low frequency or filtering, that is, the frequency signal through the inductor coil will encounter resistance, while the low frequency signal through the resistance presented is relatively small, that is, the low frequency signal can be easier to pass, the inductor coil resistance to DC is almost zero;. 3, diode: to play the role of rectification, wave detection and voltage regulation. 4, transistor: to play the role of amplifying AC and pulse current and impedance transformation. 5, integrated circuit: to play a role in the application of the above functions in a centralized manner.

Switching power supplies use High frequency transformers The reason. 1, for safety, regardless of high frequency or low frequency, it is necessary to isolate the high voltage with a transformer. 2, high magnet transformer both from the material and copper wire are very economical, and small volume. 3, silicon steel sheet a material of low frequency transformer, large volume, not economic, only for low frequency pulse power isolation. 4, why not use the transformer isolation at the rectifier? Because you want to switch power supply both save material and compact, you can not use a large volume of low-frequency rectifier at the front of the frequency transformer, and because the high-frequency rectifier diode can not reach the switching tube, high-frequency transformer output tens of thousands of KHz high-frequency square wave. 5, the old cell phone charger with frequency transformer, only 500mA output, because the low frequency 50Hz can not make the secondary side of the coil induction greater electric field, you want to change the output power, the primary original coil diameter and the number of turns by the limitations, if the line thick, winding the number of turns less will make the transformer no-load hot, so only the switching tube to send out high-frequency oscillation and then the output of a compact high-frequency transformer, rectified and filtered by And then regulated, in order to output a safe low-voltage high current (such as 5V4A).

Switching power supply is very common in our life, such as lighting circuits to convert the household 220V voltage into lighting lamps with 48V or 24V voltage, power chargers, etc. The work of switching power supply is inseparable from the support of driver chips, resistors, capacitors, inductors, of which the role of magnetic ring inductor is very important. What is the role of magnetic ring inductor in switching power supply? Magnetic ring inductor is a property of closed circuit, in layman's terms, is to pass DC block AC, resistance to changes in current, in high power switching power supply, electromagnetic interference is more serious, in order to suppress electromagnetic interference, often using common mode magnetic ring inductor, common mode magnetic ring inductor two windings with the same in and out, the same number of turns, switching power supply on the moment of power, there is a strong AC current over, at this time the magnetic ring inductor can suppress the changes The moment the switching power supply is turned on, there is a strong AC current over, at this time the magnetic ring inductor can suppress the change of AC current over, making the current more smooth and stable.

Magnetic ring inductor coil heating characteristics: magnetic ring inductor coil is to store energy, suppress electromagnetic interference, through the DC block AC, when the current flowing through the inductor coil is large, the coil will be hot, serious will be hot, the inductance of the inductor will decay, the inductor body surface temperature rises, when the temperature rise of the current exceeds 40 degrees Celsius, the inductor will lose inductive characteristics. In severe cases, the entire PCB board will be burned. The magnetic ring inductor coil is hot for three reasons. 1, the resistance is large, the wire diameter is small or winding the number of coils, resulting in too high copper resistance. 2, the magnetic ring material, the magnetic ring belongs to the magnetic material, with magnetic saturation capacity, the higher the permeability, the worse the magnetic saturation capacity, the smaller the saturation current, the more likely to heat up. 3, the size of the magnetic ring, the larger the size of the magnetic ring, you can use a large wire diameter coil with a small number of turns, strong current resistance, it is not easy to heat.

Common mode magnetic ring inductors are wound on both sides of the same number of turns, the same in and out, the number of turns less common mode inductors, line up a layer of general can be completed, this simple here is not introduced, the following is to introduce the number of turns, the middle of the common mode magnetic ring inductors need to be placed in the spacer winding method. The specific process is to tie a tape at each of the symmetrical semicircle of the ring, with the width of the tape slightly larger than the thickness of the spacer. The principle is that when pulling the second layer of the wire row, the coil will slip and slide to the edge on the surface of the magnetic ring, and tying the rolling tape will stop the coil from sliding to both sides. The method of operation is more expensive, but does not affect the surface finish of the magnetic ring. Method 2: Rubbing vanilla water The magnetic ring first with a high concentration of vanilla water or no diluent to the insulating oil soaked magnetic ring for a few seconds, hands wearing rubber gloves, repeatedly rubbing in the surface of the magnetic ring, so that the surface of the magnetic ring to form folds, increasing the roughness of the surface of the magnetic ring. Allow to dry naturally, you can wind the wire directly on the magnetic ring, because the surface of the magnetic ring is rougher, when pulling the wire, the coil will not slip, and after the winding is completed, you can also directly insert the spacer into it. This method is often used by magnetic ring inductor manufacturers because of its low cost and operability, but the surface finish of the magnetic ring is poor, and the surface has folds formed by insulating oil, so the overall appearance is slightly poor.