How does the inductor work?

An inductor is a device that converts electrical energy into magnetic energy and stores it. It is made of coiled wires. The working principle of the inductor is to use the law of electromagnetic induction, that is, when the current passes through the inductor, a magnetic field will be generated; When the magnetic field changes, induced electromotive force is generated in the inductor.

The characteristic of the inductor is that the direct current is a path, and the alternating current is a barrier, and the degree of obstruction is proportional to the AC frequency and the inductance. The main functions of inductors are:

1, choke: use the reverse electromotive force generated by the inductor to block the change of current, often used in high or low frequency choke coils.

2, tuning and frequency selection: The use of inductors and capacitors in parallel to form LC tuning circuit, to achieve a certain frequency of AC signal selection or amplification, often used in radio, radio and other fields.

3, choke: the use of inductor through DC and AC resistance characteristics, to suppress the rectified pulsating DC signal, often used in filtering, transformer, AC coupling and other occasions.

4, filter: The use of inductors and capacitors to form a filter circuit to smooth the DC signal or remove clutter interference, often used in rectification, voltage regulation and other occasions.

5, oscillation: The use of inductors and capacitors to form a oscillation circuit to turn the DC signal into an AC signal, often used in transmission, reception and other occasions.

What are the commonly used components of electrical control systems?
Electrical control system commonly used devices have a lot, according to the search results, I listed the following for you:

1, circuit breaker: also known as automatic air switch, can be manually switched, but also can be used to distribute power, do not frequently start asynchronous motor, the power line, motor, etc. to protect, when they occur serious overload, short circuit or undervoltage failure can automatically cut off the circuit.

2, contactor: composed of two parts of the electromagnetic mechanism and contact system, can remotely control the circuit on and off, often used for frequent load start control occasions.

3. Thermal relay: It is a relay that uses the thermal effect principle generated by the current through the component to reverse the time limit action, mainly used for overload protection of asynchronous motors.

4, intermediate relay: also known as contactor relay, is an input signal into a plurality of output signals or signal amplification relay, mainly used in the control circuit to transmit intermediate signals or expand contact logarithm.

5, button: is a commonly used small current master electrical appliance, the use of finger press or release to achieve contact closure or disconnection, so as to control the main circuit or control circuit on and off. Buttons come in different colors and shapes to distinguish different functions and roles.

6, indicator light: is a commonly used display element, the use of different colors of light to indicate the operation or stop state of the equipment, monitoring whether the power supply of the control appliance is normal, and whether the loop is on and off.

7, universal transfer switch: also known as multi-stage transfer switch, is a control of multi-loop master electrical equipment, to operate the handle rotation to achieve the contact in the specified order to close or disconnect. Mainly used for the conversion of various control lines; Commutation measurement and control of voltmeter and ammeter; Power distribution line conversion and remote control; Direct control of small capacity motor starting, speed regulation and commutation.

8, travel switch: is a commonly used small current master electrical appliance. Using the collision of the moving parts of the production machinery to make its contact action to realize the switch or break the control circuit, to achieve a certain control purpose.

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