Is electric power va the same as electric power w?

Is electric power va the same as electric power w?

Remember that it is effective but not useful but not useful!
What is the relationship between them? Let’s look at their formula:

The cosine of the phase difference (Φ) between voltage and current is called the power factor, and is represented by the symbol cosΦ.
According to the formula, we can see that the relationship between them is: S2=P2+Q2

We can draw three types of power success triangles. The two right-angled sides represent active power and reactive power respectively, and the oblique side represents apparent power.


Add to this:
In communication Circuit In, by power supply There are two types of power supplied to the load: one is active power and the other is reactive power.

Active power is the electrical power required to keep the electrical equipment running normally, which is the electrical power that converts electrical energy into other forms of energy (such as mechanical energy, light energy, thermal energy).

Reactive power is relatively abstract. It is used to exchange electric field and magnetic field in circuits and is used to establish and maintain the electric power of the magnetic field in electrical equipment. It does not work externally, but transforms into other forms of energy. Any electrical equipment with electromagnetic coils consumes reactive power to establish a magnetic field. Reactive power is by no means useless power, it is of great use Electric motor It is necessary to establish and maintain a rotating magnetic field to rotate the rotor, thereby driving mechanical movement. The rotor magnetic field of the motor is established by obtaining reactive power from the power supply. The transformer also needs reactive power to make the primary coil of the transformer generate a magnetic field and induce the voltage in the secondary coil. Therefore, without reactive power, the motor will not rotate and the transformer will not transform.