We all know that in the application of inductor solutions, selection is crucial. With the widespread application of electronic equipment, electromagnetic compatibility has become an issue that cannot be ignored in circuit design. As a commonly used electromagnetic interference suppression device, ferrite beads play an important role in electronic equipment. Let’s discuss the specification selection of ferrite bead inductors in general.
Basic Principles of Ferrite Beads:
The material of the beads is ferrite, which has high magnetic permeability, high temperature resistance, and can generate inductive reactance within a certain frequency range. The inductive reactance value changes with the frequency. At low frequencies, the inductive reactance value of the beads is low, but as the frequency increases, the inductive reactance value will gradually increase. When the frequency reaches a certain value, the inductive reactance value of the beads will suddenly decrease, and high-frequency noise can be well absorbed at this time.
Ferrite Bead Material:
The main material of magnetic beads is ferrite, which is a metal oxide with high magnetic permeability, composed of iron, manganese, zinc and other elements. Among them, manganese ferrite and zinc ferrite are the most commonly used magnetic bead materials. Manganese ferrite has a higher magnetic permeability and can produce inductive reactance at lower frequencies, while zinc ferrite has a lower magnetic permeability and is mainly used for high frequencies.
Function of Ferrite Beads:
Ferrite beads are a kind of soft magnetic material made of ferrite, which has the characteristics of high resistivity and low coercivity.
It can effectively absorb electromagnetic interference, reduce electromagnetic interference between electronic devices, and improve the electromagnetic compatibility of equipment.
How to Select SMD Ferrite Beads?
1. Determine the interference source and interference frequency
Before selecting ferrite beads, you must first determine the interference source and interference frequency. By analyzing the electromagnetic interference of the equipment, determine the interference frequency and interference source type that need to be suppressed, and provide a basis for selecting appropriate ferrite beads.
2. Select the appropriate ferrite bead model
Select the appropriate ferrite bead model according to the interference source and interference frequency. Generally speaking, the smaller the ferrite bead model, the stronger its suppression ability; the larger the model, the weaker its suppression ability. Therefore, when selecting ferrite beads, you need to choose according to the actual situation.
3. Consider the installation method and size of ferrite beads
The installation method and size of ferrite beads will also affect their suppression effect. When selecting, you need to consider factors such as the structure of the equipment and the size of the space, and choose the appropriate installation method and size.
Application Examples of Ferrite Beads:
We take a specific electronic device as an example to explain how to choose a suitable ferrite bead. The device is subject to high-frequency electromagnetic interference during operation, resulting in performance degradation. By analyzing the interference source and interference frequency, select the appropriate ferrite bead model and installation method. After actual testing, the electromagnetic compatibility of the equipment has been significantly improved.
The selection method of ferrite beads is introduced, including determining the interference source and interference frequency, selecting the appropriate ferrite bead model, and considering factors such as installation method and size. Through the introduction of actual application cases, it is proved that choosing a suitable ferrite bead can effectively improve the electromagnetic compatibility of the equipment.
In order to ensure the selection of suitable ferrite beads SMD to ensure its performance and applicability.
ZXcompo has many years of project experience and has accumulated rich experience in the selection of SMD ferrite core inductors. Here are some suggestions for you:
1. Determine the application requirements: Clarifying the requirements is a key step in selecting specifications, because the selection of inductors is to solve application problems;
2. Pay attention to the rated current: When selecting ferrite core inductors, avoid excessive rated current, as this may cause the inductor to overheat and degrade performance.
3. Pay attention to the application environment: The use environment will affect the performance of the inductor, so when selecting, consider environmental factors such as operating temperature range, humidity, and vibration.
4. Package size and installation method: The size and installation method of ferrite core inductors should be compatible with the design of the equipment for easy integration and maintenance.
5. Performance parameters: The selection of performance parameters is also based on the use requirements. Don’t pursue performance that is too large or too small in one aspect unilaterally.
In summary, when selecting ferrite beads, it is necessary to comprehensively consider application requirements, environmental conditions, performance parameters, and convenience of installation and maintenance, etc., to ensure that the selected magnetic head can effectively meet the expected electromagnetic interference suppression requirements. I hope this article can help readers better understand and apply ferrite beads.
Advantages of Zxcompo Inductors
Zxcompo products include multilayer power inductors, wound surface mount inductors, and molded surface mount inductors for power and signal lines. A full range of passive electronic and magnetic components including inductors, capacitors, resistors, transformers, and filters are available. Our products are widely used in automotive, telecommunications, consumer electronics, and other fields. Each product is designed to achieve performance and maximize signal and power efficiency while saving space.
Other advantages include:
Fully automated manufacturing
High reliability AEC-Q200
ISO 9001 quality standards
RoHS compliant
REACH compliant
Why choose Zxcompo?
Our company has more than 1,000 types of inductors and 15 years of experience in this field. It is a product that produces extremely low resistance over a wide frequency range. Zxcompo is widely recognized by a global technical team for designing, manufacturing, and providing high-quality, high-performance signal integrity and noise filtering solutions.
Zxcompo brand inductors, also known as coils or reactors, are passive electronic components that resist changes in the current flowing through them. Core material, winding type and geometry play a critical role in the performance of power inductors. Shipping worldwide. Simply contact us for samples: sales@ZXcompo.com.
