Why does capacitive load increase voltage?
When we connect capacitive load to the alternator magnetization effect will happen inside the alternator because of armature reaction. It makes rise in amount of flux inside the alternator. Hence the terminal voltage increases.
Why the output voltage of transformer increases when capacitive loading is used?
The voltage is higher because the capacitive current passes through the impedance of the transformer. The impedance is mainly an inductance. So the voltage across this impedance is phase shifted of 90° in advance with the current.
Why does secondary terminal voltage decrease when a load on a transformer increases?
This resistance is combination of winding resistance and reflected reactance of the primary. As load increases, load current increases. This will increase voltage drop across Zth i.e. equivalent internal resistance of the transformer. Hence load or terminal voltage of transformer will decrease.
How does transformer increase secondary voltage?
- Any increase in the number of turns in the primary will reduce the volts per turn ratio, thus lowering the secondary voltage.
- Any decrease in the number of turns in the primary will increase the volts per turn ratio, thus increasing the secondary voltage.
What is the effect of capacitive load?
Capacitive loads are the third type, and are opposite of inductive loads. Capacitive loads include energy stored in materials and devices, such as capacitors, and cause changes in voltage to lag behind changes in current.
Why does capacitive load decrease line current?
In a capacitive circuit, when capacitance increases, the capacitive reactance XC decreases which leads to increase the circuit current and vise versa. In oral or verbal, Capacitive reactance is a kind of resistance. When resistance increases, the circuit current decreases and vice versa.
What is the effect of inductive and capacitive load on the generated voltage of an alternator?
If the synchronous generator is connected with the inductive load its voltage regulations are highly positive. If the load is resistive then the voltage regulation is less positive. If the load is capacitive then the voltage regulation is negative.
What is the effect of using resistive capacitive and inductive load on alternator?
If the load is purely resistive, the power factor is 100\% and the voltage drop will be approximately8\% to 20\% of the no-load voltage. An inductive load brings a more appreciable voltage drop of 25\% to 50\% of the no-load voltage and a capacitive load tends to raise the alternator output voltage.
Why no load voltage is greater than full load voltage?
The reason the full-load voltage is less than the no-load voltage is because when there is no load on the source, the voltage drop across its internal impedance is equal to zero.
How does secondary voltage increase?
So if you want a 12V secondary you wind 12 turns; 24V requires 24 turns, etc. If you want the transformer to increase voltage, you have to add more turns. The one volt per turn transformer would make 200 volts with 200 turns; 240 volts with 240 turns etc.
How does a transformer increase voltage?
When a source of AC is connected to one of the coils, that coil creates a magnetic field that expands and collapses in concert with the changing voltage of the AC. In other words, as the voltage increases across the coil, the coil creates an expanding magnetic field.