Make a 2000 Watt inverter, 12 volt power supply, which kind of transistor, how many? How to calculate? Thank you The power supply is 12 volt battery, so many tubes should be divided into two parallel?

Make a 2000 Watt inverter, 12 volt power supply, which kind of transistor, how many? How to calculate? Thank you The power supply is 12 volt battery, so many tubes should be divided into two parallel?

Go to check the circuit diagram on the Internet and have a look at the information in this respect. What is not clear here, don't even understand the circuit diagram

Calculation formula of power factor of industrial electricity
How to calculate the power factor after knowing the data of positive total active power, positive peak active power, positive average active power, positive Valley active power and positive total reactive power?

Hehe
Can not calculate, but also need to know the total reactive power
At present, the calculation formula of average power factor of industrial power consumption adopted by the state is as follows:
Average power factor = total active energy / (square root (square of total active energy + square of total reactive energy))
Power factor is to measure the efficiency of electrical equipment (intermediate transmission equipment, power distribution equipment, etc., which can be regarded as generalized electrical equipment)
The original definition of power factor is:
Power factor = active power / apparent power, and the value is between 0 and 1.00. The closer to 1.00, the higher the power factor is, the higher the electrical efficiency of the equipment will be
A large number of inductive devices (transformers, motors, etc.) in the power grid need a large amount of inductive reactive power because of the need to establish the working magnetic field, which leads to the low power factor of the power grid
Capacitor work needs to establish electric field, also need reactive power, but it is capacitive reactive power, its phase is just opposite to the inductive reactive power. So the capacitive reactive power of shunt capacitor can compensate (offset) the inductive reactive power of motor, transformer and so on, so as to use electrical equipment to reduce the reactive power demand of power grid, improve the power factor. This is the principle of capacitance compensation
For more questions about reactive power compensation, you can learn from our website: please search "Shenzhen Aote electric appliance technology center FAQ". Baidu does not allow us to send the website address, please forgive me!

There are three resistors a, B and C connected in a triangle. The resistors are all 30 ohm. Three power supply voltages 380 V are connected to the three vertices of the triangle to calculate the total power
Wait for the answer
380 * 380 / 20 * 3 is about 21000w
30 ohm and a 60 ohm shunt resistor are equal to 20
I don't know if it's OK to calculate like this? Now it's just a tangle between what you calculate and this

It can be regarded as a single resistor connected to 380V power supply, three groups in total. Ptotal = (380 * 380 / 30) * 3 = 14440w

The workshop needs to install a fan with 220 V power supply and 10 kW power. Try to find out the cross-sectional area of the conductor (set the allowable current density of the conductor as 5 A / mm square). If the conductor with 6 mm square section is used, what will happen?
I want to calculate the formula. How did the formula come from

According to the power factor of single-phase motor 0.85, the fan current is about 55A, and the cross-sectional area of conductor should not be less than 10 square meters