In che modo i diversi apparecchi elettronici scelgono gli induttori in base a proprietà diverse?

For inductors there are 5 main properties to consider before choosing, namely:
Dimension (mm), Inductance (uH), DCR (mOHM), Isat (A) and Irms (A).

1. Dimension (mm):
   • This refers to the physical size and shape of the inductor. The dimensions of an inductor can impact its overall size, weight, and suitability for specific applications. Larger dimensions may allow for higher power handling capabilities, but they might also be less desirable in compact electronic devices.
2. Inductance (uH):
   • Inductance is a measure of an inductor's ability to store energy in its magnetic field when current flows through it. It is typically measured in microhenries (uH). The inductance is influenced by the number of turns in the coil, the coil's dimensions, and the magnetic properties of the core material.
3. DCR (mΩ) - DC Resistance:
   • DCR stands for DC Resistance and is a measure of the resistance of the wire in the inductor. This resistance dissipates power in the form of heat when current flows through the inductor. A lower DCR is generally desirable because it results in less power loss.
4. Isat (A) - Saturation Current:
   • Saturation current is the maximum current that an inductor can handle before the core saturates. When the core saturates, the inductance drops, and the magnetic properties change. It's important to operate the inductor below its saturation current to maintain stable inductance.
5. Irms (A) - RMS Current:
   • Irms is the root mean square (RMS) current that the inductor can handle without significant performance degradation. It is a measure of the effective current that produces the same heating effect as a corresponding DC current.

The interactions between these properties depend on the specific requirements of the application. For example:

• In power supply applications, a designer may prioritize high inductance to store more energy, low DCR to minimize power loss, and a saturation current that exceeds the maximum expected current in the circuit.
• In compact electronic devices, the physical dimensions of the inductor may be a critical factor, influencing the choice of a smaller, more compact design.

  The choice of an inductor involves a trade-off between various parameters based on the specific needs of the application, balancing factors like size, inductance, resistance, and current handling capabilities, for example the following appliance has the following properties:

Appliance	Dimension (mm)	Inductance (uH)	DCR (mΩ)	Isat (A)	Irms (A)
Power Supply	Compact	High	Low	Adequate	Varies
Audio Amplifier	Varies	Medium to High	Low	Adequate	Low to High
Inductive Charging	Compact	Medium to High	Low	Adequate	Varies
Motor Control	Compact	Medium	Moderate	Adequate	Varies
RF Circuits	Compact	Low to Medium	Low	Adequate	Varies
Appliance	Dimension (mm)	Inductance (uH)	DCR (mΩ)	Isat (A)	Irms (A)
LED Drivers	Small to Medium	Low to Medium	Low	Moderate	Low to Medium
DC-DC Converters	Varies	Medium to High	Low to Moderate	Adequate	Varies
Switching Power Supplies	Compact to Large	Medium to High	Low to Moderate	Adequate	Varies
Magnetic Ballasts (Fluorescent Lights)	Varies	Medium to High	Low to Moderate	Adequate	Varies
Uninterruptible Power Supplies (UPS)	Varies	High	Low to Moderate	Adequate	Varies
Electric Motors (e.g., HVAC)	Varies	Medium to High	Moderate	Adequate	Varies
Microwave Ovens	Compact to Large	Low to Medium	Low to Moderate	Adequate	Varies
Refrigerators	Varies	Low to Medium	Low to Moderate	Adequate	Varies
Washing Machines	Varies	Medium	Moderate	Adequate	Varies
Air Conditioners	Varies	Medium to High	Moderate	Adequate	Varies
Televisions	Varies	Low to Medium	Low to Moderate	Adequate	Varies
Computer Power Supplies	Compact to Large	Medium to High	Low to Moderate	Adequate	Varies
Electric Vehicles (EVs)	Varies	High	Low to Moderate	Adequate	Varies
Solar Inverters	Varies	Medium to High	Low to Moderate	Adequate	Varies
Welding Machines	Varies	High	Low to Moderate	Adequate	Varies

In light of this, and properties of different kind of inductors, one can choose the different type of inductors accordingly:

Inductor Type	Dimension (mm)	Inductance (uH)	DCR (mΩ)	Isat (A)	Irms (A)
Molded Power Choke	Compact to Large	Medium to High	Low to Moderate	Adequate	Varies
Common Mode Choke	Compact to Large	Low to Medium	Low to Moderate	Adequate	Varies
Ferrite Based SMT Power Choke	Small to Medium	Low to Medium	Low to Moderate	Adequate	Varies
Traditional Inductor	Varies	Low to High	Low to High	Varies	Varies
Multilayer Beads & Inductors	Tiny to Small	Low to Medium	Very Low to Low	Limited by Size	Limited by Size
Customized Design	Varies	Varies	Varies	Varies	Varies

DJSelectronique, Shenzhen has been providing high cost-performance inductors for decades to Chinese domestic market as well as International clients, Please contact us to get the inductors most suitable for your project.