WHY IS THE INDUCTANCE WHEN THE WIRE IS WOUND IN A CIRCLE
The working principle of inductor is veritably abstract. In order to explain what inductance is, we start from the introductory physical marvels.
Two marvels and a law-- electromagnetism, magnetoelectricity and Lenz's law
1. Electromagnetism miracle
A small glamorous needle is placed next to the galvanized captain, and the direction of the small glamorous needle is veered, indicating that there's a glamorous field around the current.
Still, the glamorous field generated by each circle of captain coincides, and the glamorous field as a whole becomes stronger and can attract small objects, If we circle the captain.
2. ( moving) magnetoelectric miracle
When a part of the captain of a unrestricted circuit moves in a slice glamorous field, electricity is generated on the captain. The prerequisite is that the circuit and glamorous field are in a fairly changing terrain, so it's called" dynamic"magnetoelectricity, and the performing current is called convinced current.
We can do an trial with a motor. Generally speaking, the ordinary DC has a encounter motor, the stator part is a endless attraction and the rotor part is a coil captain. Manually rotating the rotor means that the captain is cutting the glamorous line of force, and the voltage change can be measured by connecting the two electrodes of the motor with an oscilloscope. The creator is made according to this principle.
3. Lenz's law
Lenz's law the convinced current caused by the change of glamorous flux is in the direction of defying the change of glamorous flux.
The simple understanding of this judgment is that when the glamorous field ( external glamorous field) of the captain's terrain becomes stronger, the glamorous field produced by its convinced current is contrary to that of the external glamorous field, making the total glamorous field weaker than the external glamorous field as a whole. When the glamorous field ( external glamorous field) of the captain's terrain becomes weaker, the glamorous field produced by its convinced current is contrary to that of the external glamorous field, making the total glamorous field stronger than the external glamorous field as a whole. According to Lenz's law, the direction of the convinced current on the circuit can be determined.
4. What on earth is inductance
Inductance is used to describe the capability of the device to repel the change ofcurrent.However, also the inductance of the inductor is lesser, and vice versa, If the capability to repel the change of current is stronger.
For DC excitation, the final inductor is in a short- circuit state (voltage is 0). But in the process of electrification, the voltage and current aren't zero, which means that there's power, and the process of accumulating this energy is charging, which stores the energy in the form of a glamorous field and releases energy when demanded ( similar as the current in the steady state can not be maintained by external excitation).
Inductor is an inertial device in the electromagnetic field, inertial bias don't like change, just like the flywheel in dynamics, it's delicate to rotate at first, but it's delicate to stop formerly it rotates, and it's accompanied by energy conversion.
This is why winding the line into a circle is the preface ofinductor.However, please feel free to communicate us, if you want to know further about inductors.
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