What effect does an inductive load have on current?
Reactive/Inductive Load – An inductive load converts current into a magnetic field. Inductive reactance resists the change to current, causing the circuit current to lag voltage.
Why inductive load draws more current?
A highly inductive load means an unacceptable voltage drop from sending end to receiving end (load side), due to high reactive current over the transmission line. When load power factor is improved, the line current goes down, and hence drop over the transmission line, resulting in higher voltage at receiving end.
Which parameter suddenly change inductive load?
An oscillatory transient is a sudden change in voltage or current or both in bidirectional polarity (positive and negative). In other words, frequency variations within the voltage cycle up to 5 MHz are called oscillatory transients.
What is difference between resistive load and inductive load?
In resistive loads, such as light bulbs, the voltage and current waves match, or the two are in phase. As you might guess from the name, resistive loads only resist the current and are the simplest type of load. In inductive loads, such as an electric motor, the voltage wave is ahead of the current wave.
Is an inductive load leading or lagging?
Power factors are usually stated as “leading” or “lagging” to show the sign of the phase angle. Capacitive loads are leading (current leads voltage), and inductive loads are lagging (current lags voltage).
Is the load inductive or capacitive?
Capacitive load is similar to that of inductive load. In capacitive loads also, current & voltage are out of phase with each other. The only difference is that, in capacitive load current leads the voltage by 90 deg. Whereas, in inductive load current lags behind the voltage by 90 deg.
What is inductive and capacitive load?
Compared to resistive loads, inductive load current peaks after voltage. Consequently, inductive coils produce lagging power factors. Capacitive load elements use capacitors that store electrical charge. They resist changes in voltage, which causes current to peak before voltage during each electrical cycle.
What is the power factor of inductive load?
zero
For the purely inductive circuit, the power factor is zero, because true power equals zero.
How do you know if current is leading or lagging?
If the resulting current phase angle is more negative in relation to the driving (source) voltage phase angle, then the power factor is said to be “lagging”. If the resulting current phase angle is more positive in relation to the driving (source) voltage phase angle, then the power factor is said to be “leading”.
Why inductor does not allow sudden change in current?
A sudden change in current means, di changes for time dt equal to zero. Therefore, the voltage value becomes infinite. Infinite voltage does not exist. Hence the sudden change of current is not allowed by an inductor.
What is the output waveform of an inductive load?
If the load is resistive, the output current waveform will be a copy of the voltage waveform as shown in Fig.14.4 (a). The output voltage is a square (or quasi-square) wave. However with an inductive load Fig.14.4 (b), the load current i is delayed although the output voltage wave is still a square.
What is inductive load and reactive load?
Load which consumes only reactive power is called as inductive load. And if you look at the voltage and current waveforms of such load, you’ll find that, the voltage & current are out of phase with each other by 90 deg. Now, when I say they out of phase, that means, both the waveforms reaches their peak value at different times.
What is the difference between voltage waveform and current waveform?
If the load is purely resistive, the current reproduces the voltage waveform. If instead the load is inductive, the current waveform is smoothed and the current harmonic content will be lower than the voltage. Each branch of bridge inverter may be realized with BJTs, MOSFETs, or IGBTs.
How does an inductive load filter harmonics?
An inductive load filters the higher order harmonics of the current, and the current in the RL branch is smooth and approaches a sinusoidal wave. Figure 4.10. Harmonic spectrum of the output voltage of a bipolar PWM bridge inverter.