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What Happens When Power Inverter Goes Bad?

Views:102     Author:Site Editor     Publish Time: 2019-10-08      Origin:Site


Power Inverter (Vehicle Power Supply) is a convenient power converter which can convert DC 12V DC power supply into AC 220V AC power supply. Here are some common problems of power supply inverters.



Q: SMT patch technology is used in the manufacture of power supply inverters. What is SMT patch technology?

A: SMT is called automatic programming placement machine. SMT is actually a packaging form of resistor and capacitor components.It has high precision, small size, high degree of automated processing, and good component soldering reliability. The power inverter is to realize the processing and production of products through SMT.



Q: What is a single chip microprocessor?

A: All power supply inverters with high and low voltage alarm, protection and other parameters and functions realized by CPU microprocessor are called single chip microprocessors.



Q: What is a simulator?

A: The simulator is a kind of machine that separates components to realize the functions of various parameters of power supply inverters.



Q: What are the performance characteristics of power supply inverters?

A: The power supply inverter can convert DC12V to 220V. It has the following functions:

1) Input high and low voltage alarm and protection.

2) Overload protection.

3) instantaneous impact twice the rated power.

4) Overload and short circuit protection.



Q: What is the working principle of power supply inverters?

A: The PWM pulse is realized by the CPU microprocessor, and the low voltage 12V is changed to a DC voltage of about 300V by the high frequency transformer. Then the CPU outputs a 50 Hz AC drive signal to drive the power switch to operate. Through the successive conduction conversion of the power tube, an AC voltage of an average effective value of 220V in the form of a square wave is output.



Q: Is the output voltage of the power supply inverter stable?

A: The output voltage of the power supply inverter can be stabilized by its feedback confirmation. No-load and rated voltage changes less than 10V.



Q: How to determine whether the stability value is safe for users?

A: The power inverter fully considers the external environment. When an overload or short circuit occurs, the power inverter will automatically protect the power off.



Q: What is the output frequency of the power supply inverter? What is the output frequency?

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



Q: What is the continuous output power?

A: Continuous power refers to the power supply inverters can work continuously under normal conditions.



Q: What is the peak output power?

A: Peak power refers to the power that the power supply inverters can withstand at the moment of start-up, usually refers to the load of motor type. When starting, the instantaneous start-up power, which is formed by large start-up current, is called peak output power.



Q: What is the difference between the continuous output power of the power inverter and the peak output power?

A: The continuous power and peak power vary depending on the meaning of their expression.

Continuous Load = Current Value * 220 (AC Voltage)

Start-up Load = 2 x Power Value

Generally speaking, the startup load of an electrical appliance or electric tool determines whether the power converter is capable of driving it.



Q: What is an inductive load?

A: Usually, the load with inductance parameters, that is, the load with current lead voltage characteristics, is transformed into inductive load.



Q: What is a capacitive load?

A: Generally, the load with capacitive characteristic parameters, that is, the load with voltage lead current characteristics, is called capacitive load.



Q: What is the difference between inductive load and capacitive load?

A: The load characteristics are different. First of all, when selecting the load, it must meet the rated power of the power inverter. As long as the conditions of power supply inverters are satisfied, their capacitance and inductive load effects are the same.



Q: What is the difference between the output waveform of the power supply inverter and the output voltage of 220V?

A: The power inverter outputs an analog sine wave, while the other is a true sine wave.



Q: What is the difference between the output waveform of the power supply inverter and the output voltage of 220V?

A: The 220V voltage output from the power inverter is exactly the same as the city voltage.



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

A: The power inverter can only be used for input DC voltage of 11V-15V.



Q: Can the power inverter work beyond or below the output value?

A: Below the input value, the power inverter issues a low voltage alarm, please pay attention to the power load. When the input voltage is low, the power inverter is automatically protected. Above this input value, the power inverter is automatically protected. When the input voltage is much greater than that, the power components of the power inverter are damaged.



Q: How to understand the conversion efficiency of power supply inverters?

A: Conversion efficiency of power supply inverters generally refers to the ratio of effective output power to total input power. It is understandable that the higher the conversion efficiency, the better.



Q: What is the no-load current value of the power supply inverter?

A: No-load current refers to the current consumed by the power supply inverter without load.



Q: What role does the cooling fan of the power supply inverter play?

A: The cooling fan of the power inverter mainly acts as a heat sink. The side panel fan is used to draw air to form air convection, so that the power components of the power inverter operate in a safe temperature environment.


As a power converter for DC-to-AC used in automobile mobile, the power inverter will bring convenience to the life, and it is also a must-have item for car.



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