Understanding perceptual load

inductive load

Inductive load refers to a load with inductance parameters. Specifically, inductive loads, such as transformers, motors, etc., should have a phase difference characteristic of the load current lagging behind the load voltage. another

Another type refers to some devices that consume reactive power while consuming active power, and have a coil load circuit, called inductive load.

When the switch is disconnected, the inductive load will inevitably generate a reverse electromotive force, resulting in overvoltage.

The application of inductive loads in relays is to consume the electromagnetic energy stored in the electromagnetic coil through arcing between contacts.

application

Electrical appliances are divided into: a. resistive loads. b. Capacitive load. c. Inductive load, inductive load, and capacitive load do not do any useful work. Except for resistive load, most of them are inductive loads, which are a group of inductors and are usually used to compensate for capacitive current in the circuit. Therefore, when compensating, most of them use capacitors to make pure capacitive load (a group of capacitors) use more than pure inductive load. For lamps, lamps that rely on gas conduction to emit light are inductive loads, such as fluorescent lamps, high-pressure sodium lamps, mercury lamps, metal halide lamps, etc; Relying on resistive wires to emit light belongs to resistive loads, such as iodine tungsten lamps, incandescent lamps, resistance furnaces, ovens, electric water heaters, hot oil lamps, etc.

High power electrical products made using the principle of electromagnetic induction, such as electric motors, compressors, relays, fluorescent lamps, etc., require a much higher starting current (approximately 3-7 times the starting current required to maintain normal operation) during startup. For example, a refrigerator that consumes about 150 watts of electricity during normal operation can have a starting power of over 1000 watts.