What is a large inductor?

The largest inductor ever known to me was Fermi National Accelerator Lab’s Tevatron magnet. If memory serves it was 1000 Henries running continuously at 1400 DC Amperes. Energy storage must have been right around 1 GigaJoule.

What factors need to be considered when selecting a coupled inductor?

When selecting an inductor for a buck converter, as with all switching regulators, you’ll need to define or calculate the following parameters:

• Maximum input voltage.
• Output voltage.
• Switching frequency.
• Maximum ripple current.
• Duty cycle.

What factors need to be considered when designing selecting a coupled or any other inductor?

RF Considerations When an inductor is needed for an RF application, you must keep two factors in mind:

• Q factor (quality), which relates to the inductor’s resistance value. High Q factor is always the more ideal value.
• Self-Resonant Frequency (SRF), which is the frequency when the device ceases its role as an inductor.

Why are inductors so big?

Ultimately, the physical size of a inductor is related to the energy it can store. Different core materials can store different amounts of magnetic energy per volume, but within the same core material, inductor size is largely dictated by energy storage.

What is the largest inductor value?

Murata Manufacturing Co., Ltd. has recently developed a film-type high-frequency chip inductor（*1） that has the world’s largest inductance value（*2） of 39 nH.

How do coupled inductors work?

Coupled inductors function in dc-dc converters by transferring energy from one winding to the other through the common core. They are available in many sizes, inductance values, and current ratings and most are magnetically shielded for low electromagnetic interference (EMI).

What is the difference between coupled inductor and transformer?

Coupled Inductor: – A coupled inductor is an inductor with two or more windings on the same core which takes advantage of magnetic coupling to influence the behavior of each winding on the other. Transformer: – A magnetic device that transfers energy instantaneously through its magnetic field.

Does size of inductor matter?

Different core materials can store different amounts of magnetic energy per volume, but within the same core material, inductor size is largely dictated by energy storage. where J is the energy in Joules, A the current thru the inductor in Amps, and H the inductance in Henrys. So yes, size matters.