An current inductor is a passive electrical component that stores energy in a magnetic field when electric current flows through it. This magnetic inductor usually consists of an insulated wire wound into a coil, with two terminals. It may have a magnetic core inside the coil, such as an air core, an iron core or a ferrite core.
When an electric current passes through the coil of the inductor, a magnetic field is generated around it. According to Faraday's law of induction, when the current flowing through the coil changes, the time-varying magnetic field will induce an electromotive force (emf) in the conductor. The induced voltage has a polarity that opposes the change in current that created it. That is, it resists any changes in the current through it. BST inductor coil manufacturer provides custom inductor for various applications.
Current Inductor Types by Core Design
ferrite core inductor can ben classified by many standards, one of the most popular way is to classified by core design
toroidal core inductor: The coil is wound on a toroidal core, which has very low flux leakage, but requires special winding machines for manufacturing.
Drum/Bobbin Core Inductor: The coil is wound on a bobbin. These bobbin inductors or drum inductors vary widely in power rating, voltage and current levels, and operating frequency, and are mostly used in switch mode power supplies and power conversion applications.
Features of Toroidal Inductor
• Low radiation
• Low core loss
• Low core saturation
• Operating temperature range: -55°C to +105°C
• RoHS compliant product
Since most of the toroidal core inductors are customized, in this chart, BST power inductor manufacturer only show two typical parts for reference, please contact BST for more details.
|
Part Number Example |
Inductance(μH) |
DCR(mΩ max) |
Idc(A) |
Irms(A) |
Height(mm) |
Width(mm) |
|
BST-MC-10-T |
10 |
48 |
2.5 |
2 |
8.5 |
4.5 |
|
BST-MC-1000-T |
1000 |
638 |
1.5 |
3 |
30 |
17.5 |
BST Sensor also offers additional magnetic components, including magnetic choke. If you require these in bulk, please do not hesitate to reach out to us.
Features of Radial Inductor
Low cost, high current
Inductance range from 10 - 1,000 µH
Open construction
Optional inductance tolerance: K = ±10%
Since most of the radial lead inductors are customized, in this chart, BST only show two typical parts for reference, please contact BST for more details.
Part Number Example
Inductance(μH) DCR(mΩ max) Idc(A)
BST-MC-10-R 10
0.022 5.3
BST-MC-1000-R 1000 1.7 0.53
Ferrite Core Inductor FAQs
What sets iron core inductors apart from ferrite core inductors?
Iron core inductors, used in traditional transformers, are larger with lower inductance. Conversely, ferrite core inductors, like toroidal core inductors, are smaller, offering higher inductance, ideal for compact designs favored by inductor suppliers.
What's the purpose of a ferromagnetic core inductor?
A ferromagnetic core inductor, such as a ferrite core inductor, eliminates common mode noise in signal or power lines by blocking low-frequency noise and absorbing high-frequency noise, boosting circuit reliability, as supported by inductor coil manufacturers.
What are the drawbacks of high current power inductors with ferrite cores?
High current power inductors with ferrite cores have lower saturation flux density than silicon steel, limiting their magnetic flux capacity before saturation, making them less ideal for high-power uses, per power inductor manufacturers.
What's the role of the core in a magnetic inductor?
The core in a magnetic inductor, often iron or ferrite, amplifies the magnetic field, increasing inductance. This makes inductors, including those from custom inductor manufacturers, key passive components in circuits alongside capacitors and resistors.
What are the applications of a pfc inductor?
A pfc inductor, like a power factor correction inductor, is used in power conversion, broadband, and interference suppression, leveraging its electromagnetic properties, as supplied by power inductor manufacturers.
Why are high current inductor with ferrite cores better for high-frequency uses?
High current inductors, such as pfc boost inductors, use non-conductive ferrite cores with low coercivity and minimal eddy current losses, ensuring high efficiency in high-frequency applications.
