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PV inverters are two major categories: one is the classification according to the scope of application; another one is classified by the output waveform.
(A) Application by Category:
(1) Common Inverter
12V or 24V DC input, AC 220V, 50Hz output power from 75W to 5000W, and some models have AC-DC converter that is UPS function.
(2) inverter / charging machine
In this type of inverter, the user can use various forms of power supply for AC load: AC when using alternating current through an inverter to supply the load, or for battery charging; when no AC, batteries AC power to the load . Use it in conjunction with a variety of power: such as batteries, generators,
Solar panels and wind turbines.
(3) posts and telecommunications dedicated inverter
Providing telecommunications, communications inverter 48V high-quality, good product quality, high reliability, modular (module 1KW) inverter, and having N + 1 redundancy, scalable (power from 2KW to 20KW ).
(4) Aviation, army special inverter
Such inverter as the 28Vdc input and provides the following AC output: 26Vac, 115Vac, 230Vac, the output frequency may be: 50Hz, 60Hz and 400Hz, the output power range from 30VA to 3500VA. Also for aviation dedicated DC-DC converter and the inverter.
(B) the output waveform classification:
(1) square wave inverter
AC voltage waveform is a square wave inverter output is a square wave. Such an inverter circuit used in the inverter is not exactly the same, but the common feature is relatively simple lines, a small number of power switch used. Design of power is generally between one hundred watts to kilowatts. Advantages square wave inverter is: Line is simple, cheap, and easy maintenance. The disadvantage is that due to the square-wave voltage contains a large number of high-order harmonics generated additional losses in the electrical load with core inductor or transformer in for some radio and communication equipment interference. In addition, these inverters also pressure range is not wide enough, the protection function is not perfect, relatively large noise and other shortcomings.
(2) step wave inverter
AC inverter output voltage waveform such as step wave inverter to achieve stair-step output also has a great variety of differences in the number of different lines ladder, the output waveform. Advantages step wave inverter is, for example, the output waveform wave significantly improved, reducing high harmonic content, when the ladder to reach 17 or more quasi-sine wave output waveform can be achieved. When using transformerless output, high overall efficiency. The disadvantage is that the ladder wave superposition circuit using more power switches, some of which form line also requires multiple sets of DC power input. This gives a balanced grouping with wiring and battery charging solar phalanx are in trouble. In addition, the step voltage wave radio communications equipment and some are still some high-frequency interference.
(3) sine wave inverter
AC voltage sine wave inverter output waveform is a sine wave. Advantages sine wave inverter, the output waveform is good, low distortion, interference to radio and communication equipment, low noise. In addition, the protection function, high efficiency of the unit. Disadvantages are: line relatively complex, maintenance of high technical requirements, more expensive.
Inverters above three types of classification, in favor of photovoltaic systems and wind power systems designers and users on the inverter identification and selection. In fact, the same waveform of the inverter circuit is still a big difference in principle, the use of control devices and methods, and so on.
Hanfong New Energy Technology Co., Ltd. is a professional power inverter manufacturer and solar inverter manufacturer, our products enjoy an excellent reputation in the market, if you need quality inverter, please contact us.