Q&A on the manufacturing process of power inverter

　　This article summarizes and sorts out some problems in the manufacturing of power inverters.

　　1. What is the difference between the continuous output power and the peak output power of a power inverter?

　　Continuous power and peak power differ in what they mean.

　　Continuous load = current value 220 (AC voltage)

　　Starting load = 2 power value

　　Generally speaking, the starting load of an appliance or power tool determines whether your power converter has the ability to drive it.

　　2. What is an inverter inductive load?

　　Under normal circumstances, the load with inductance parameters, that is, the load that meets the current leading voltage characteristics, is called an inductive load.

　　3. What is capacitive load?

　　Generally, a load with capacitive characteristic parameters, that is, a load that conforms to voltage leading current characteristics, is called a capacitive load.

　　4. What is the difference between carrying an inductive load and a capacitive load?

　　Load characteristics are different. First of all, when selecting the load, it must comply with the rated power of the power inverter. As long as the usage conditions of the power inverter are met, its effect with capacitive and inductive loads is the same.

　　5. What is the difference between the output waveform of the power inverter and the output of 220V city voltage?

　　The power inverter outputs a simulated sine wave, while the mains power is a real sine wave.

　　6. What is the difference between the waveform output by the power inverter and the voltage value of the output 220V?

　　The 220V voltage value output by the power inverter is exactly the same as the market voltage value.

　　7. Is the power inverter only suitable for input DC voltage of 11-15V?

　　The power inverter can only be used with input DC voltages of 11V-15V.

　　8. Will it be suitable and work above or below this output value?

　　If the input value is lower than this value, the power inverter will issue a low voltage alarm. Please pay attention to the electrical load. When the input voltage is very low, the power inverter automatically protects. When the input value is higher than the input value, the power inverter will automatically protect. When the input voltage is much greater than the input value, the power components of the power inverter will be damaged.

　　9. How to understand the conversion efficiency of power inverter?

　　The conversion efficiency of a power inverter generally refers to the ratio of the output effective power to the total input power. It can be understood that the higher the conversion efficiency, the better.

　　10. What is the no-load current value of the power inverter?

　　No-load current refers to the current consumed by the power inverter itself when there is no load.

　　11. What is the main function of the cooling fan of the power inverter?

　　The cooling fan of the power inverter mainly plays the role of heat dissipation. The side panel fan is used to draw air to form air convection, so that the power components of the power inverter can work in a safe temperature environment.

　　1. There is SMT chip technology in the manufacturing of power inverters. What is SMT chip technology?

　　SMT is called an automatic programming patch machine. SMT is actually a packaging form of resistive and capacitive components. It has high precision, small size, high degree of automated processing, and good component welding reliability. The power inverter is processed and produced through SMT.

　　2.What is a microcontroller?

　　Any power inverter model that implements high and low voltage alarms, protection and other parameters and functions through a CPU microprocessor is called a single-chip model.

　　3.What is a simulator?

　　The model that realizes the functions of various parameters of the power inverter by separating components is called a simulator.

　　4. What are the performance characteristics of power inverters?

　　The power inverter can convert DC12V to 220V. It has the following features:

　　1) Input high voltage and low voltage alarm and protection.

　　2) Overload protection.

　　3) Instant impact 2 times the rated power.

　　4) Overload and short circuit protection.

　　5.What is the working principle of power inverter?

　　The PWM pulse is realized by the CPU microprocessor, and the low voltage 12V is converted into a DC voltage of about 300V through a high-frequency transformer. Then the CPU outputs a 50 Hz AC drive signal to drive the power switch to work. Through the sequential conduction conversion of the power tube, an AC voltage with an average effective value of 220V in the form of a square wave is achieved.

　　6. Is the voltage output by the power inverter stable?

　　The output voltage of the power inverter is confirmed by its own feedback to stabilize the voltage. The change in voltage between no-load and rated is less than 10V.

　　7. How to determine whether its stable value is safe for users?

　　The power inverter fully considers the external use environment. When overload or short circuit occurs, the power inverter will automatically shut down for protection.

　　8. What does the output frequency of the power inverter refer to? What is its output frequency?

　　The output frequency of the power inverter refers to the period of the output AC square wave. Its frequency is 50 Hz. The national power standard is 50 Hz. Generally, the cycle is 20MS, F=1/T=50HZ.

　　9.What is continuous output power?

　　Continuous power refers to the power that the power inverter can work continuously under normal circumstances.

　　10.What is peak output power?

　　Peak power refers to the power that the power inverter can withstand at the moment it is turned on, usually referring to a motor type load. The instantaneous starting power caused by the large starting current when starting is called peak output power.

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