What is the Inductance of the Micro DC Motors?

An inductor is an electrical element that is composed of a wire or coil used to store and release electromagnetic energy. The main function is to change the size and direction of the current and store electricity. It is one of the important components in electronic circuit and is widely used in various electronic equipment and communication systems.

The basic principle is to use the magnetic field generated by a current in a wire or coil to store energy. When the current passes, it creates a magnetic field around the wire or coil that is stored in the inductance. When the current changes, this magnetic field also follows the change and creates an electromotive force that reverses the current change. Therefore, it has the property of resistance to the current change.

Inductor is used to describe the ability of the device to counter the current change. If the stronger the ability to counter the current change, the greater the sensitivity of the inductor, and the smaller the vice versa. For the DC excitation, the final inductance is in a short-circuit state (the voltage is 0). However, in the process of electrification, the voltage and current are not zero, which means that there is power, the process of accumulating these energy is charging, it stores the energy in the way of magnetic field, releasing energy when needed (such as the current when the external excitation cannot maintain the steady state).

The unit is Henry (H), which represents the magnitude of the magnetic field generated by the unit current in the inductance. The size depends on the coil length, the cross-sectional area, and the magnetic permeability of the material. In general, the more turns of the coil, the larger the value. In addition, the core material of the coil will also affect the size, the common core materials are iron core, air and ferrite.

The inductor is also a kind of energy storage element, it does not consume electric field energy, but converts the electric field energy, stored in the form of magnetic field energy; the current flowing through the ideal inductor can not be changed, the current through it will produce self-inductive electromotive force, the change trend is opposite to the direction of the applied voltage change (negative feedback). The characteristics of it through two voltage modes: DC voltage and AC voltage; add DC voltage at the inductor (the intermediate resistance R): at the moment, it generates the same applied voltage (in the subsequent inductor principle) in the opposite direction with high impedance in the circuit (open circuit); As the current increases, until the current becomes stable, it is short circuit in the circuit; the energy released by the power supply is completely converted into the magnetic field energy of it. Add AC voltage at both ends of it, the self-inductive electromotive potential behind the current phase 90, the applied voltage ahead of the current phase 90, the self-inductive electromotive potential and the external AC voltage phase is completely opposite; inductor impedance XL=j ω \ omega \ omega L; through the calculation of the inductor impedance, we know that the inductor impedance and inductor sense value and signal frequency are proportional, so as to get the application of the inductor intuitively: large inductor is used for "direct resistance", small inductor is used for "low and high resistance", just opposite to the capacitor.

There are multiple applications in electronic circuits. One of these common applications is as a filter for eliminating high-frequency noise in the power source. The inductance can prevent the high-frequency signals from passing through, thus ensuring a stable DC signal in the circuit. Another common application is used as a major component of the transformer, used to change the voltage and power of the current. It can also be used to generate oscillator circuits and to regulate the size of the current.

In addition to the above applications, it also plays an important role in wireless communication and power transmission. In wireless communication, for adjusting the operating frequency of the antenna and for enhancing the ability to receive and transmit signals. In the power transmission, it is used to control the size and direction of the current and improve the efficiency and stability of the power system.

The above are some professional knowledges on inductance by VSD Motors. For more relevant information, please contact us.