Inductor Transient

电感瞬态

When a battery is connected to a series resistor and inductor, the inductor resists the change in current and the current therefore builds up slowly. Acting in accordance with Faraday's law and Lenz's law, the amount of impedance to the buildup of current is proportional to the rate of change of the current. That is, the faster you try to make it change, the more it resists. The current builds up toward the value it would have with the resistor alone because once the current is no longer changing, the inductor offers no impedance. The rate of this buildup is characterized by the time constant L/R . Establishing a current in an inductor stores energy in the magnetic field formed by the coils of the inductor.

当电池连接到一个电阻和电感器的串联电路中时，电感器会抵抗电流的变化，因此电流逐渐建立起来。根据法拉第定律和楞次定律，电流建立过程中的阻抗与电流变化率成正比。也就是说，你试图让电流变化越快，电感器的阻力就越大。电流最终会达到仅由电阻单独存在的电流值，因为一旦电流不再变化，电感器就不会产生任何阻抗。这种建立过程的速率由时间常数L/R来表征。在电感器中建立电流会储存能量在由电感器线圈形成的磁场中。