Output waveform classification

Output waveform classification
(1) square wave inverter
AC voltage square wave inverter output waveform is a square wave. Such inverter inverter circuit used is not exactly the same, but the common feature is relatively simple lines, a small number use the power switch. Design pure sine wave online ups 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, resulting in additional losses in the load appliances with core inductor or transformer in on the radio and some communications equipment interference. In addition, these inverters also pressure range is not wide enough, the protection function is not perfect, the noise is relatively large defects.
(2) step wave inverter
AC inverter output voltage waveform of such a stepped wave, a stepped wave inverter output is also to achieve a great variety of different line number stepped difference, the output waveform. Advantages step wave inverter, the output waveform for example, a significant improvement in waves, reducing high harmonic content, when the ladder when you reach 17 or more can be achieved quasi-sinusoidal output waveform. When using transformerless output, high overall efficiency. The disadvantage is that the ladder wave superposition line using the power switch more, some of which also require multiple sets of lines in the form of a DC Ups power manufacturer input. This gives a balanced group with wiring and battery charging solar phalanx were trouble. In addition, voltage step wave radio and some communications equipment are still some high-frequency interference.

The inverter only has straight AC conversion function

The inverter only has straight AC conversion function, also has a maximum limit to carry forward the usefulness and functionality of the solar system maintenance function problems. Summed up the initiative to stop the operation and function of the maximum industrial ups power supply point tracking control function, anti-alone operation function (and network systems), active voltage regulation function (and network systems), DC detection function (and network systems), the DC ground fault detection function (and network systems). Here brief introductions active operation and shutdown function and maximum power point tracking control function.
An initiative to stop the operation and function of the morning after sunrise, solar radiation intensity gradually strengthen, the output of solar cells also increased, when the tasks required to reach the inverter output power, the initiative to start the operation of the inverter. After entering operation, the inverter output will be at all times the solar cell module custody, only the output power of the solar cell module is greater than the inverter output Outdoor cabinet required for the task, the inverter will continue to operate; stop until sunset, even rainy days inverter can operate. When the output of solar modules become smaller, the inverter output is close to 0, the inverter will constitute standby mode.
2, the maximum power output of the solar tracking control function module is included with the intensity of solar radiation and the solar cell module itself temperature (chip temperature) and change. Else because the solar cell module having a voltage drop with the increase of the current characteristics, and thus be able to obtain the best task exists the maximum power point. Changes in the intensity of solar radiation is obviously the best task point is also in transition. Related to these changes, the task has been to make solar modules at maximum power point point, the system always get the maximum power output from the solar components, such restraint is the maximum power point tracking control. Most important feature of solar power inverter system that covers the use of the maximum power point tracking (MPPT) in this function.