The inverter converts direct current energy (battery, battery) into alternating current (generally 220V,50Hz sine wave). It consists of inverter bridge, control logic and filter circuit. Widely used in air conditioning, home theater, electric grinding wheel, power tools, sewing machine, DVD, VCD, computer, TV, washing machine, range hood, refrigerator, video recorder, massager, fan, lighting and so on. In foreign countries because of the high penetration rate of cars to work or travel, you can use the inverter to connect the battery to drive electrical appliances and various tools. The on-board inverter output through the cigarette lighter is 20W, 40W, 80W, 120W to 150W power specifications. More power inverter power is connected to the battery through the connection line. By connecting household appliances to the output of the power converter, various appliances can be used in the car. Electrical appliances that can be used are: mobile phones, laptops, digital cameras, cameras, lighting, electric shavers, CD players, game consoles, handheld computers, power tools, car refrigerators and all kinds of travel, camping, medical emergency appliances.
Characteristic
1. High conversion efficiency, fast start;
2. Good safety performance: the product has 5 protection functions of short circuit, overload, over/under voltage and over temperature;
3. Good physical properties: the product is made of all-aluminum shell, good heat dissipation performance, hard oxidation treatment of the surface, good friction resistance, and can resist a certain external extrusion or impact;
4. Strong adaptability and stability with loadRange of application 1. Use office equipment (such as computers, fax machines, printers, scanners, etc.);
2. Use household appliances (such as game consoles, DVDS, stereos, cameras, electric fans, lighting fixtures, etc.);
3. Or need to charge batteries (mobile phones, electric shavers, digital cameras, camcorders, etc.);
Application fields
1. The 220V electricity obtained by the inverter on the car is 220V 50HZ, the high-end point is sine wave, and the cheap one is generally square wave.
The kind of sine wave and the electricity used on the socket is the same, and the square wave can also be used, but if you use a fan and other motor equipment, there will be some noise, the reason why square wave is used is because this modulation method is relatively low cost. In general, the inverter of the car, the maximum power is 500 watts, the air conditioning is generally more than 700 watts, and you really want to put the home air conditioning on the car?? The air conditioning in the car, including those buses, is to let the engine directly drive the compressor, not electricity, if there is a more electric conversion process in the middle, the loss is greater. And it's not easy to install, you might as well use a car air conditioner.
2. Pick up a notebook, TV, disc player and the like, as long as it is used at his rated power, there is no problem, but it needs to be noted that he is connected to the car battery, although he is generally 11V automatically protect the power off, to avoid too low voltage resulting in the car can not start, but it is not suitable for use in the case of the engine is not running, so if the load is relatively large, We still recommend starting the engine. It's fine if it's a charging dock for your phone.
3. Electric vehicle, there is a module called DC-DC, he is also called DC converter, this module input 48V, output 12V, then you only need to buy a 12V input vehicle inverter can be used. Of course, if you can buy a 48V input inverter is better, but it is estimated that it is difficult to buy and, this module generally can only provide 5A current, but at most 10A, and what are the lights also need to be used, so it is easy to overload, it is recommended that if you can, buy a DC converter, this converter is dedicated to your inverter power supply. Then if the DC converter can only provide 5A, then the inverter input should be less than 5A, otherwise it may damage the module, of course, there are some DC converter current is very large, if the repair place is not, you can go to some electrical stores or ask them to repair to give you a large current, or multiple DC converters can also be in parallel, in short, Just don't overload him.
4. There is a vvvf traction inverter on urban rail vehicles, which is used for variable frequency and variable voltage. When the train is pulled, the high voltage (generally dc750V or DC1500V) is changed into a three-phase power supply traction motor with adjustable frequency and voltage. During braking, the three-phase electric energy generated by the rotating traction motor driven by the train inertia can be converted into direct current and fed back to the power grid or consumed through the energy consumption module.
The main applications of inverters in the field of communication are:
Some maintenance tools require AC power. The DC power supply cannot provide AC power. You can use an inverter to provide AC power.
The direct current generated by the solar system is converted into alternating current and input to the power grid.
Main classificationBy wave string properties
It is mainly divided into two categories, one is sine wave inverter, and the other is square wave inverter. The output of the sine wave inverter is the same or even better sine wave alternating current as the grid we use every day, because it does not exist in the grid electromagnetic pollution. The output of the square wave inverter is a poor quality square wave AC, and its positive maximum to negative maximum is generated almost at the same time, which causes severe instability to the load and the inverter itself. At the same time, its load capacity is poor, only 40-60% of the rated load, can not take inductive load. If the load is too large, the third harmonic component contained in the square wave current will increase the capacitive current in the incoming load, and the power filter capacitance of the load will be damaged seriously. In response to the above shortcomings, there is a quasi sine wave (or improved sine wave, modified sine wave, simulated sine wave, etc.) inverter, the output waveform from the positive maximum to the negative maximum between a time interval, the use effect has been improved, but the quasi sine wave waveform is still composed of broken lines, belongs to the category of square wave, continuity is not good. In summary, sine wave inverters provide high-quality AC power and can drive any kind of load, but the technical requirements and costs are high. Quasi-sine wave inverters can meet most of our electricity needs, high efficiency, low noise, moderate price, and thus become the mainstream products in the market. The production of square wave inverter uses a simple multivibrator, and its technology belongs to the level of the 1950s, which will gradually withdraw from the market.
Inverters are divided into coal inverters, solar inverters, wind inverters and nuclear inverters according to the different power sources. According to different uses, it is divided into independent control inverter and grid-connected inverter. In the world, the efficiency of solar inverters is higher in Europe and the United States, the European standard is 97.2%, but the price is more expensive, and the efficiency of other inverters in China is below 90%, but the price is much cheaper than imports. In addition to the power, waveform, the efficiency of the selection of inverters is also very important, the higher the efficiency, the less energy wasted on the inverter, the more power used for electrical appliances, especially when you use a small power system this importance is more obvious.
By the nature of the source flow
Active inverter: The current in the current circuit is connected to the power grid on the AC side rather than directly connected to the load of the inverter;
Passive inverter: The current in the current circuit is not connected to the power grid on the AC side and is directly connected to the load (that is, the direct current is inverted to a certain frequency or an adjustable frequency of AC supply load)
By grid-connected type It is divided into off-grid inverters and grid-connected inverters.
By power class
Divided into high power inverter, medium power inverter, low power inverter
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