Knowledge of the power inverter

Definitions
Power inverter ( car power ) is a way to convert the DC power DC12V and AC220V AC mains the same , for general electrical use , is a convenient power converters.
?Market conditions
Power Inverter in foreign markets was generally welcomed. Abroad due to the higher prevalence of motor vehicles , there is no occasion when they go out in the mains work or travel to connect car battery with an  vehicle power inverters   , electrical appliances and power tools driven by what works to promote
After China's entry into WTO, more and more private buyers in the domestic market , therefore , as a DC power inverter for use in the car on the move to AC power converter will bring convenience to your life , but also the essential car owners supplies.
Wide range of uses
Power inverter applies not only to vehicle systems , as long as there is DC12V power of the occasion, can use the power inverter will convert DC12V AC220V AC, bring convenience to your life . 5 high and low voltage alarm and shutdown role is reflected in how ? High and low voltage power  solar inverters   when the alarm on and off the red LED lights , and an alarm sounds .
Protection
Power inverter when the battery using the battery , the battery voltage drops to 9.5V, the power inverter will automatically shut down to ensure that the car can be started normally , the battery will not be damaged.
How to Protect
Power inverter is an electronic circuit by internal settings, battery protection function automatically . 8 What is the most prone to failure ? How do I exclude ? When using a power inverter , shutdown and alarm if the phenomenon , check the following:
1 ) driven by electrical power exceeds the value of 6000 watt power inverters the rated power of the inverter .
2 ) power inverter and battery and electrical connections are good .
3 ) Use the process down , whether the temperature alarm , then a period of inactivity can continue to use .
Note that the use of battery power inverter power system voltage value, and read the instructions before using the fine .

Two-level inverter

Conventional  800 watt inverter is also commonly called the two-level converter and
inverter bridge circuit is generally used, this topology is relatively simple. Solar cell characteristics of a current source type, the PV array corresponds to a large inductance in series with the current source, and in this way connected to the grid, the grid is called the current source. To improve the grid current, the AC side filter capacitor needed, for photovoltaic cells connected in series to the inductor in the corresponding DC bus. Due to the presence of large inductance, the DC loop current is not easy to change when the  24 volt inverters  switching operation is not guaranteed if the inverter input current is stable, easy to produce higdi / dt, affect the safe operation of the inverter.

Inverter

The inverter is a DC power (battery, battery) into alternating current (typically 220 volts 50HZ sine wave or 12 volt inverter square wave) devices. The most common emergency power, are generally the reverse into 220V DC bottle exchange. Simply put, the inverter is a direct current into alternating current devices.
Whether it is in a remote mountain village, or the wild need or emergency power inverter is a very good choice. More common is the room will be used UPS, when a sudden power outage, UPS batteries can reverse into AC DC Reid for computer use, thus preventing data caused due to 24 volt inverters sudden power loss problems. Able to provide uninterrupted power supply, with some security and reliability, stability. The inverter can also be supporting the use of the generator can effectively save fuel, reduce noise, wind energy, solar energy field, the inverter is essential. The inverter can also use small cars, boats, portable AC power supply equipment in the field

Characteristic frequency inverter

A high load capacity
2 quiet, efficient operation
3 front panel LED indicators and adjustable switch selectors
4 optional settings lead-acid batteries, gel batteries, or glass fiber separator (AGM) batteries
5 three-stage charging (current charge, absorption, and float), resulting in improved performance
6.70A automatic 3 stage battery charger
7 fast switching (to the battery grid and battery grid) of standby power
8 low idle  24 volt inverters  (less than 1 watt) and the engine can be consistent with energy conservation in the absence of load.
9 low battery, overload, high power, high temperature protection circuit
10. Has sustained life under extreme environmental conditions
11 high overload capability can bear large loads,  24v inverter  case of overload stable processing circuit board conformal coating to protect them from corrosion and improve the reliability of the service life of the Netherlands
12. Durable powder-coated, corrosion-resistant steel chassis, with waterproof function

12-volt and 24-volt 48-volt inverter What's the difference?

The inverter output is the same as 220V, but not the same as the input voltage. To see what the power of your own most convenient, you can choose which of the 24v inverter  In addition, the input voltage is high, the use of undervoltage protection will be more wide, easier to use.
If 12V input inverter, less than 10V, the protection of the general will not work (most products). 48V input to the inverter 41 volt only protection.

Inverter structure and working principle

The inverter is a power adjusting means consisting of a semiconductor device, mainly for converting the DC power into AC power. Generally composed of a boost circuit and an  car inverters  bridge circuit. Boosting circuit boosting the DC voltage of the solar battery to the inverter output control DC voltages required; put the bridge circuit of the inverter DC voltage equivalent to the boosted common frequency is converted into an AC voltage. The inverter is constituted by the main switching element such as a transistor by the switching element regularly repeating ON - OFF (ON-OFF), the output of the DC input to AC. Of course, this is simply an  grid inverters  output waveform generated by the opening and closing of the circuit is not practical. Generally requires the use of a high frequency pulse width modulation (SPWM), brought close to the sine wave voltage across the width becomes narrow, the center voltage of the sine wave is widened, and in a half cycle of the switching element is always in one direction at a constant frequency operation, the thus formed a pulse wave train (quasi-sine wave). Then let the pulse wave form by a simple sine wave filters.

Power Inverter Precautions

1 ) TV, monitor , such as a motor when starting the peak power , although the power converter can withstand twice the nominal peak power , but some of the electrical power in accordance with the peak power required may exceed the peak output power of the converter , overload induced current is turned off . While mppt solar controllers multiple appliances could happen , then you should turn off electrical switches , open the converter switch , and then turn on electrical switches one by one , and should be the first to turn on the highest peak of appliances.
2 ) In use, the battery voltage begins to drop when the input DC voltage converter down to 10.4-11V, alarms emit a buzzing sound , then a computer or other sensitive electrical appliances should be promptly closed , if ignored alarm sound, the conversion will the voltage to 9.7-10.3V , the automatic shutdown to avoid excessive battery is discharged , power protection turns off, the red light is on ;
3 ) shall2000 watt power inverter

 start the vehicle , to the battery charge to prevent power failure, affect the car started and battery life ;
4 ) Although the converter is no overvoltage protection , input voltage exceeds 16V, may still damage the converter ;
5 ) After continuous use , the shell surface temperature to rise to 60 ℃, attention to smooth airflow , temperature sensitive objects away from the impact

.