Contents
How do you determine the value of an inductor?
First, the procedure to use when selecting an inductor is described.
- Calculate the required inductance L.
- Calculate the maximum current flowing in the inductor (output current + one-half of the ripple. current).
- Select an inductor having the calculated value L (or a value close to it) and with an inductor.
What is the use of inductor in power supply?
Inductors are typically used as energy storage devices in switched-mode power devices to produce DC current. The inductor, which stores energy, supplies energy to the circuit to maintain current flow during “off” switching periods, thus enabling topographies where output voltage exceeds input voltage.
What is inductor and how it works?
An inductor is a passive electronic component which is capable of storing electrical energy in the form of magnetic energy. Basically, it uses a conductor that is wound into a coil, and when electricity flows into the coil from the left to the right, this will generate a magnetic field in the clockwise direction.
Why is an inductor important to a DC power supply?
An inductor is an important component of a DC/DC power supply. There are many considerations to make when choosing an inductor, such as inductance value, DCR, size, and saturation current. The saturation behavior of the inductor is often misunderstood and can be troublesome.
Can a power supply filter be made from one inductor?
A good power supply filter can be built from a single inductor and damped capacitor. This is called an LC filter. Other designs are possible, with more or fewer components. The design process is to first generate the requirements for the inductor LB, choose a candidate for the inductor, and then design the filter around it.
How can I tell if my power supply inductor is saturated?
Sometimes it is inconvenient to test the inductor current, as it may require partially lifting the inductor off the PCB to measure its current. Another trick is to measure the inductor temperature with a thermal camera. If the temperature significantly exceeds the design expectation, that may indicate that the inductor is saturated (see Figure 9).
What are the main requirements for inductor selection?
Final inductor selection depends on four main design requirements: efficiency, electromagnetic interference (EMI), available space, and cost. In handheld battery powered equipment high efficiency from the smallest possible part is required. Also as the electronics are tightly packed, low EMI is essential.