Shenzhen Kunyo is a trusted manufacturer specializing in custom transformers and inductors, offering high-quality magnetic components backed by our experienced R&D and production teams.
Since our founding, we have remained committed to the principles of superior quality, competitive pricing, reliable service, and integrity. These values guide everything we do and have earned us the trust and praise of customers across the industry.
We are known for fast delivery, consistent product quality, and honest, responsive service. Over time, we have built a strong reputation and established a respected brand image in the magnetic component sector.
With reasonable pricing, a stable inventory of standard materials, and efficient production capabilities, we are fully equipped to support both high-volume orders and small-batch customizations.
Common mode inductors (Common mode Choke), also known as common mode chokes, are often used in computer switching power supplies to filter common mode electromagnetic interference signals. In board design, common mode inductors also play the role of EMI filtering, used to suppress the electromagnetic waves generated by high-speed signal lines from radiating outward.
A common mode choke is an electrical component, and it is usually made of two coils wound around the same magnetic core. It is widely used in electronic devices to prevent common mode interference and ensure the stability and reliability of the equipment. A common mode choke is an electrical filter designed to block high-frequency noise common to multiple data or power lines while allowing the desired DC or low-frequency signals to pass through. Common mode (CM) noise current is typically generated by sources such as unwanted radio signals, unshielded electronic devices, inverters, and motors. If this common mode noise is not filtered, it can interfere with electronic devices and circuits. For example, if our computer power supply does not have a common-mode chokes, there may be a lot of interference signals, making the computer run unstably.
We are expert at meeting customer needs with custom specifications. And we take pride in manufacturing chokes,and inductors specifically tailored to your application, delivering the precise impedance you require.
Common-mode chokes typically feature two windings coiled around a shared magnetic core. This clever design acts like two partners working in unison to safeguard the circuit. When common-mode current flows through both windings, it creates magnetic fields in the same direction, which combine to effectively counteract and suppress common-mode noise.
The choice of magnetic core material plays a significant role in the choke’s performance. For instance, ferrite cores are well-suited for high-frequency applications due to their excellent noise attenuation properties.
The operation of common-mode chokes is quite remarkable. For common-mode currents, the magnetic fields generated by the windings reinforce one another, enhancing the choke’s noise-suppression effect. In contrast, for differential-mode currents—where the current flows in opposite directions through the windings—the magnetic fields cancel each other out. This enables the choke to filter out unwanted common-mode noise while allowing the desired signal (differential-mode current) to pass through unimpeded.
The types of common-mode chokes can be classified according to their structure and application.
The magnetic core-type common-mode Chokes is usually composed of two coils and a magnetic core. The magnetic core is generally a magnetic material of ferrite or other types of materials. This common-mode Chokes is generally used in low-frequency equipment
The magnetic core-type common-mode Chokes is usually composed of two coils and a magnetic core. The magnetic core is generally a magnetic material of ferrite or other types of materials. This common-mode Chokes is generally used in low-frequency equipment
Intelligent common-mode chokes, this is a special common-mode chokes, which can adjust the inductance and capacitance values according to the actual needs of the circuit.
Inductance is an important parameter of common-mode chokes. Its size affects the suppression effect of common-mode noise. The larger the inductance, the stronger the suppression ability of low-frequency common-mode noise. But it cannot be too large, which may affect the normal operation of the circuit.
This rated current is like the power limit that the common-mode chokes can withstand. If the current in the circuit exceeds the rated current of the common-mode chokes, the common-mode chokes may heat up or even be damaged. Therefore, when selecting a common-mode chokes, it is necessary to select a common-mode chokes with a suitable rated current according to the actual current in the circuit.
DC resistance affects the DC signal transmission in the circuit. If the DC resistance is too large, the DC voltage drop in the circuit will increase, which may affect the normal operation of other components in the circuit.
Common-mode chokes are widely used across a broad range of electronic devices, including power converters, communication systems, robotics, and traffic control equipment. Their primary purpose is to suppress interference caused by common-mode noise.
Noise issues are particularly common during the operation of electronic equipment, especially in systems operating at high frequencies. In such cases, common-mode chokes play a crucial role in minimizing electromagnetic interference, thereby improving the overall stability and reliability of the circuit.
In summary, common-mode chokes are essential components in modern electronics for mitigating common-mode noise. They help ensure consistent circuit performance, and different types can be selected based on the specific requirements of the application.
To select the right common-mode choke, start by considering the operating frequency of your circuit. For high-frequency applications, choose a choke with strong high-frequency performance.
Next, match the inductance value to the level of common-mode noise present in the circuit. It’s also important to ensure the choke’s rated current can handle the circuit’s current load without overheating or saturation.
Finally, take into account the physical size and cost of the choke. Aim for a solution that meets your electrical performance needs while remaining compact and cost-effective.
Established in 2013, Shenzhen Kunyo Technology is committed to designing and manufacturing custom magnetic components, including high-frequency transformers, low-frequency transformers, audio transformers, power transformers, and inductors.
Contact us right now to get more information, we will have people reply within 12 hours.
You can get a price of this model or send us any question to get any information you would like to know, we will reply to you soonest.