Industry News

Application field of inverter

2020-10-17

1. The 220V electricity obtained by the inverter in the car is 220V 50HZ, the high-end ones are sine waves, and the cheap ones are generally square waves.

The sine wave type is the same as the electricity used on the socket, and the square wave type can actually be used, but if you use a fan and other equipment with a motor, there will be some noise. The reason why the square wave is used is The cost of this modulation method is relatively low. Generally, the maximum power of this vehicle-mounted inverter is only 500 watts, and the air conditioner is generally more than 700 watts. And, do you really want to install home air conditioners in the car? ? ? The air conditioners in automobiles, including those in buses, let the engine directly drive the compressor instead of using electricity. If there is an additional electric conversion process in the middle, the loss will be even greater. And it's not easy to install, it's better to use car air conditioners.

2. Connect laptops, TVs, disc players, etc., as long as they are used at their rated power, there is no problem, but it should be noted that they are connected to the car battery, although they are usually 11V and automatically protect them from power failure. Avoid the low voltage causing the car to fail to start, but it is still not suitable for use when the engine is not running, so if the load is relatively large, it is recommended to start the engine. If it is to charge the phone, there is no problem.

3. On electric vehicles, there is a module called DC-DC, which is also called a DC converter. This module inputs 48V and outputs 12V, so you only need to buy a 12V input car inverter to use it. Of course, if you can buy a 48V input inverter, it is better, but it is estimated that it is difficult to buy. Moreover, this module generally can only provide 5A current, but at most 10A, and the car lights are also used, so it is easy to overload.

Suggestion: If you can, buy an extra DC converter, this converter is dedicated to your inverter, and then if the DC converter can only provide 5A, then the inverter input should be less than 5A, otherwise the module may be damaged Of course, some DC converters have high currents. If there is no place to repair the car, you can go to some electrical appliance stores or ask them to repair them to give you a large current, or multiple DC converters in parallel can also be used. In short, Don't overload him.

4. There is a vvvf traction inverter on urban rail vehicles, which is used for frequency conversion and voltage transformation. When the train is traction, the high voltage (usually dc750V or DC1500V) is converted into three-phase electricity with adjustable frequency and voltage to supply the traction electric motor. During braking, the three-phase electric energy generated by the inertia of the train driving the rotation of the traction motor can be converted into direct current and fed back to the grid or consumed by the energy consumption module.

The main applications of inverters in the communication field are:

Provide AC auxiliary power for DC power supply.

Some maintenance tools require AC power, and DC power cannot provide AC power and can be provided with the help of an inverter.

Provide DC-AC conversion function for photovoltaic grid-connected power system.

Invert the direct current generated by the solar system into alternating current and input it into the grid.