In the 12th Five Year Plan of the country, it is pointed out that "to adapt to the requirements of large-scale cross regional transmission and new energy generation grid connection, accelerate the construction of modern power grid system, further expand the scale of power transmission from west to east, improve the regional backbone power grid, and develop large capacity and high efficiency such as ultra-high voltage..."
Compared to other inductors, power inductors in general electronic circuits can only pass through smaller currents and withstand lower voltages; The main feature of power inductors is that they are wound with thick wires and can withstand tens, hundreds, thousands, and even tens of thousands of amperes.
When any inductor is energized, there is a certain amount of power, which is usually reactive power. If the DC resistance of the inductor wire is considered, it also consumes a certain amount of active power during operation.
But if the current passing through the inductor is much smaller than the current allowed by the wire, it is generally not called a "power inductor". For example, in the receiver circuit of a radio, the thickness of the wire only needs to consider the size of the loss, and there is no need to consider the current carrying capacity, so it is not a power inductor.
The so-called power inductance generally refers to those inductors with high current. In addition to the inductance, the size of the current passing through should also be considered.
Power inductors are used in automotive electronics, disk drives for mobile phones, cameras, laptops, and portable audio players.
The widespread application of high-power conversion terminal components on circuit boards has also led to an increase in the demand for high-efficiency DC converters and more precise inductors.
