Three Forms of Load in AC Circuit
- Autor:Felicia
- Solte em:2022-08-22
Load refers to the electronic component connected to both ends of the power supply in the circuit, which converts electrical energy into other forms of energy.
The examples are as follows: electric motors can convert electric energy into mechanical energy, light bulbs can convert electric energy into heat and light energy, and loudspeakers can convert electric energy into sound energy.
The load of AC circuit is divided into 3 types: Resistive Load / Inductive Load / Capacitive Load.
1. Resistive Load
When there is no phase difference between load current and load voltage, the load is resistive load. Electric energy is consumed in this circuit.
2. Inductive Load
When the load current lags behind the load voltage by a phase difference, the load is inductive load. This circuit has the characteristics of storing magnetic field energy.
3. Capacitive Load
When the load current exceeds the load voltage by a phase difference, the load is capacitive load. This circuit has the characteristics of storing electric field energy.
In any AC circuit, these three loads exist at the same time. However, in actual circuits, one or two loads can often be omitted according to the strength of their effects.
Pure resistance circuit is an AC circuit that omits inductance and capacitance and only has resistance load.
The resistance of generator, transformer or other equipment is very small. The circuit composed of these appliances can be regarded as a pure inductive circuit.
When connect the capacitor to the AC power supply, if the resistance is very small and can be ignored, the circuit is a pure capacitor circuit.
Examples:
When loading an incandescent lamp, electric oven or TV, it is resistive load.
When loading an electric fan, refrigerator or air conditioner, it is inductive load.
When loading a compensation capacitor, it is capacitive load.
Resistive load and inductive load are common in daily life.
The examples are as follows: electric motors can convert electric energy into mechanical energy, light bulbs can convert electric energy into heat and light energy, and loudspeakers can convert electric energy into sound energy.
The load of AC circuit is divided into 3 types: Resistive Load / Inductive Load / Capacitive Load.
1. Resistive Load
When there is no phase difference between load current and load voltage, the load is resistive load. Electric energy is consumed in this circuit.
2. Inductive Load
When the load current lags behind the load voltage by a phase difference, the load is inductive load. This circuit has the characteristics of storing magnetic field energy.
3. Capacitive Load
When the load current exceeds the load voltage by a phase difference, the load is capacitive load. This circuit has the characteristics of storing electric field energy.
In any AC circuit, these three loads exist at the same time. However, in actual circuits, one or two loads can often be omitted according to the strength of their effects.
Pure resistance circuit is an AC circuit that omits inductance and capacitance and only has resistance load.
The resistance of generator, transformer or other equipment is very small. The circuit composed of these appliances can be regarded as a pure inductive circuit.
When connect the capacitor to the AC power supply, if the resistance is very small and can be ignored, the circuit is a pure capacitor circuit.
Examples:
When loading an incandescent lamp, electric oven or TV, it is resistive load.
When loading an electric fan, refrigerator or air conditioner, it is inductive load.
When loading a compensation capacitor, it is capacitive load.
Resistive load and inductive load are common in daily life.
