The basic working principle of inductance is based on the law of electromagnetic induction. When current passes through an inductor, a magnetic field is generated around it and stores magnetic field energy; when the current changes, the magnetic field also changes, generating an electromotive force (reverse voltage) to resist the change of current. This characteristic makes the inductor “resist” the change of current in the circuit, especially playing an important role in high-frequency circuits.
The unit of inductance is Henry (H), that is, when the current change rate is 1 ampere/second, the electromotive force generated by the inductor is 1 volt. Common inductance values range from microhenry (μH) to millihenry (mH), depending on the application scenario.
Inductors in computers are electronic components that convert electrical energy into magnetic energy and store it. The main functions of the inductor include passing DC, blocking AC, tuning, filtering signals, filtering noise, stabilizing current, and suppressing electromagnetic interference.
Definition and Basic Principle of Inductance
Inductance is the ratio of the magnetic flux of the wire to the current when an alternating current passes through the wire, generating alternating magnetic flux inside and around the wire. When the current in the coil changes, the surrounding magnetic field will also change accordingly. This changing magnetic field will generate an induced electromotive force in the coil, which is the self-inductance phenomenon of inductance. In addition, when two inductor coils are close to each other, the change in the magnetic field of one coil will affect the other coil. This phenomenon is called mutual inductance.
Types and Structures of Inductors
Inductors are generally composed of a skeleton, windings, shielding, packaging materials, magnetic cores or iron cores. The skeleton is usually made of plastic, bakelite or ceramic, and is used to fix the windings and magnetic cores. The windings are made of enameled wire, yarn-wrapped wire or plastic-wrapped wire. Depending on the needs, the inductor can be wire-wound or non-wire-wound. Non-wire-wound inductors are mostly used in modern computers.
The Main Functions of Computer Inductors Include the Following Aspects
1. Filtering: Inductors are often combined with capacitors to form filter circuits to filter out high-frequency noise in the power supply and ensure the purity of the DC level.
2. Energy Storage: Inductors can store the magnetic field energy generated by the current and release it when the current changes to keep the circuit stable.
3. Signal Conditioning: In high-frequency circuits, inductors are used to regulate and transmit signals, especially in radio frequency circuits and antennas.
4. Power Management: Inductors are widely used in switching power supplies (such as DC-DC converters) to achieve voltage conversion and voltage regulation functions by storing and releasing energy.
5. Impedance Matching: In high-frequency circuits, inductors are used to achieve impedance matching, reduce reflections and losses during signal transmission, and improve signal transmission efficiency.
6. Frequency Selection: Inductors have the characteristics of frequency selection and can filter signals within a specific frequency range, such as building bandpass or bandstop filters in radio frequency circuits.
The types and application scenarios of inductors include air-core inductors, ferrite inductors, common-mode inductors, and winding inductors. Air-core inductors are suitable for high-frequency signal circuits, ferrite inductors are suitable for low-frequency to medium-frequency applications such as power supply filtering, common inductors are used to suppress common-mode interference signals, and winding inductors are widely used in switching power supplies and electronic filters.
Advantages of Shenzhen Zhenhua Inductors
Founded in 2001, Shenzhen Zhenhua Ferrite Ceramic Electronics Co., Ltd. is a leading technology developer in the passive component industry, with business covering multi-layer chip inductors, wound chip inductors, common mode inductors, NTC thermistors, transformers and capacitors. Our product line has been widely used in communications, consumer, computer, lighting, security, smart grid, medical equipment, automotive, aerospace and other fields.
Other advantages include:
Fully automated manufacturing
High reliability AEC-Q200
ISO 9001 quality standard
RoHS compliant
REACH compliant
Why Choose Shenzhen Zhenhua?
Our company has more than 1,000 inductors and 15 years of experience in this field. It is a product that produces extremely low resistance over a wide frequency range. Shenzhen Zhenhua is widely recognized by the global technical team for designing, manufacturing and providing high-quality, high-performance signal integrity and noise filtering solutions. Worldwide delivery. If you need samples, please contact us: sales@ZXcompo.com.
