What is the use of inductive circuits and capacitive circuits being low?

Inductance and capacitance are intrinsic characteristics of the device, and the inductance of the inductive element (coil) in the circuit makes the current flowing through the current not change abruptly, so that in the AC circuit, the current phase lags behind the voltage.

On the contrary, the capacitance of the capacitive element makes the voltage at both ends of the capacitive element not change abruptly, so that in the AC circuit, the current phase is ahead of the voltage.

Most electrical appliances contain coils, motors, transformers, etc., all of which are inductive, which makes the current lag in the power grid and produces reactive power.

Shunt capacitors are needed to compensate and reduce reactive power.

It's useless, she just reflects a phase relationship, because sometimes you only know a phase difference, and you can understand the specific relationship between the two when you know that it is capacitance, so as to draw a vector diagram, and this also reflects the nature of the circuit, through more in-depth study, you will learn more.

If you still have questions, please feel free to continue the discussion.

The intrinsic characteristics of the inductance and capacitance of the device, in which the inductive element in the circuit (coil) makes the flow of current instead of abrupt change the voltage that makes the AC power circuit phase lag. Target.

The electrostatic capacitance of the opposite capacitive element, therefore, the voltage at both ends can not be abruptly changed, so in the AC circuit, its current phase is ahead of the voltage.

Most coils, motors, transformers and other equipment, are inductive, currently lagging in the power grid, generating activity. Target.

Compensation of shunt capacitors to reduce reactive power.

Inductance and capacitance refer to the phase relationship between voltage and current in a circuit.

There are three cases of the phase of voltage and current in an AC circuit:

When the load is purely resistive, the voltage and current phases are the same;

When the load is (or contains) inductive properties, the voltage phase leads the current, that is, the load is inductive;

When the load is (or contains) a capacitive load, the voltage phase lag current, or the current phase ahead of the voltage, is said to be capacitive.

Two ways to judge:Calculate the impedance of the circuit z=r+jx. If x>0 in the impedance of the whole circuit, the circuit is inductive; If x<0, then the circuit is capacitive.

It has been known that the phase angle of the voltage phasor in the elimination circuit is 1, and the phase angle of the current phasor is 2. If 1- 2>0, the circuit is inductive; Otherwise, it is capacitive. （-1-φ2<π）

Here's how to tell if a circuit is inductive or capacitive

1. Observe the components contained in the circuit.

1. If the circuit contains inductors (coils), transformers, motors and other components, the circuit is an inductive circuit.

2. If the circuit contains capacitors, oscillators and other components, the circuit is a capacitive circuit. Cong suspicion.

2. Observe the response characteristics of the circuit.

1. The response characteristics of the inductive circuit are mainly sensitive to the change of frequency, that is, it has a strong impedance to high-frequency signals and a weak impedance to low-frequency signals. When the frequency approaches infinity, the impedance of the inductive circuit approaches infinity. When the frequency of slag is close to 0, the impedance of the inductive circuit is close to 0.

2. The response characteristics of capacitive circuits are mainly sensitive to changes in frequency, that is, they have a strong impedance to low-frequency signals and a weak impedance to high-frequency signals. When the frequency approaches infinity, the impedance of the capacitive circuit approaches 0. When the frequency approaches 0, the impedance of the capacitive circuit approaches infinity.

The three states of the circuit are as follows:

1. Path: the circuit that is normally connected (there is current passing through the circuit, and the electrical appliances can work normally).

2. Circuit break: disconnect the circuit somewhere (there is no current passing through the circuit, and the electrical appliance cannot work).

3. Short circuit: the wire is directly connected to the circuit connected to the positive and negative poles of the power supply without passing through the electrical appliance (the current is very large, the power supply may be burned out, and there is almost no current passing through the electrical appliance that is short-circuited). <

<> inductance is pure inductiveness, and capacitance is capacitive.

The inductance and capacitance are good at the same time, XL greater than xc is inductive, and XC greater than XL is capacitive.

The current is capacitive and the voltage is capacitive, and the current lag voltage is inductive.

<> inductance is inductive, and Xiaoshi guesses that the core of capacitance is capacitive.

Both inductance and compact capacitance exist, XL greater than xc is inductive, and XC greater than XL is capacitive.

The current leads the voltage by the capacitance, and the current lag voltage is the inductance.

In the power system, the difference between inductive reactive power and capacitive reactive power is the positive and negative difference of power. The impact on the power system is manifested in the limited capacity of the power supply and the reduction of the utilization rate of the power supply.

The difference between the perceptual reactive power auspicious withering rate and the capacitive reactive power: be careful to punch the hole.

1. The positive and negative power is different.

Since the inductive reactive current is opposite to the capacitive reactive current, the voltage is the same. So their reactive power q=ui plus or minus is exactly the opposite, compensating each other.

2. Impact on the power system.

The reactive power is timed to absorb power from the power supply and use dry energy storage, which is not consumed. When it is negative, it outputs power to the power supply and releases energy. This storage and discharge is done by reactive current, which will heat up the wire resistor and consume energy, increasing the line loss.

When energy is stored in energy, the energy is provided by the power supply, which occupies the capacity of the power supply.

Inductive reactive power and capacitive reactive power, inductive reactive power, and depleted power

Inductive reactive power and capacitive reactive power Inductive reactive power is the function of generating electricity and magnetic alternation in the AC circuit in the electrical equipment, where it is composed of windings and magnets, in the process of energy conversion, part of the magnetic energy is restored to electrical energy, and that part of the current does not consume active power, which is called inductive reactive power. Capacitive reactive power refers to the charge and discharge between the two plates of the capacitor, and the capacitor current does not consume active power, and the power caused by this current is called capacitive reactive power. <>

Judging whether a circuit is capacitive or inductive is based on the amount of current and load.

Inductance and capacitance refer to the phase relationship between voltage and current in a circuit. When the load is inductive, the voltage phase leads the current, that is, the load is inductive, when the load is a capacitive load, the voltage phase lag current, and the current phase exceeds the voltage before the shed source, that is, the negative chain collapse load is capacitive.

The difference between the circuit accommodating the excitation and the sensibility:

An inductive load is a load with an inductance parameter. To be precise, it should be the phase difference characteristic of the load current lag load voltage for inductive loads, such as transformers, motors, etc. The other refers to the circuit in which some devices consume reactive power when they consume active power, and there is a coil load, which is called an inductive load.

Capacitive load generally refers to a load with capacitive parameters, that is, a load that conforms to the characteristics of voltage hysteresis current. When the capacitive load is charged and discharged, the voltage cannot be abruptly changed, and the corresponding power factor is negative, and the corresponding power factor of the inductive load is positive. <>