SPF 4000-12000T HVM
电容和电感都是一种储能元件 ，不同的是电容是以电场的形式储存电能，电容的容量越大，储存的电量越多。 而电感则是以磁场的形式存储能量，电感器磁芯的磁导率越大，电感量也越大，则能够储存的能量也越多。
工频隔离变压器 ，是指频率为工频(50HZ)的变压器，变压器初级和次级都有电感，与逆变器里面的滤波电感，都可以储存一定的电能。而当电感流过电流时，由于电流会存在磁场，当电流的磁场经过磁芯时，电流磁场会打破“磁畴”的平衡状态，使“磁畴”同时趋向于外部磁场的方向， 进而导致磁芯此时会对外表现出磁场。而这个磁芯磁场从无到有的过程，其实就是电感储存磁场的过程。
As can be seen from the figure above, the peak power of the off-grid inverter using high-frequency isolation technology can reach twice the rated power; Off-grid inverter with power frequency isolation technology, the peak power can reach three times the rated power. Then, a 3kW high-frequency off-grid inverter can drive a 1P air conditioner (starting power about 5.5kVA), and a 12kW power-frequency off-grid inverter can drive a 6P air conditioner (starting power about 33kVA). The inverter provides starting energy for the load, partly from the battery or photovoltaic modules, and the excess is also provided by the inverter itself (internal energy storage components -- capacitors and inductors).
SPF 4000-12000T HVM
Capacitors and inductors are both energy storage components. The difference is that capacitors store electric energy in the form of electric fields. The larger the capacity of capacitors, the more electricity they store. Inductors store energy in the form of magnetic fields. The larger the permeability of the inductor's magnetic core, the larger the inductance, and the more energy can be stored.
The principle of the capacitor can be seen from its structure. As shown in the figure above, there is a metal plate on each side leading to two electrodes separated by insulating material. In the case that no external electric field is applied to both ends of the capacitor, the positive and negative charges on the two plates are in a state of equilibrium.
As shown above, when both ends of an electric field applied in capacitance, end plate began to gather on the positive, the other end of the plate is gathered negative charge, as at the ends of the capacitor voltage rising to power supply voltage, capacitance charging to stop, if disconnect external circuit, capacitance on energy will not disappear, the reason is that with positive and negative charge on the characteristic of "the same, opposites attract", The charges at both ends attract and store energy.
Power frequency isolation transformer, refers to the frequency of power frequency (50HZ) transformer, transformer primary and secondary have inductance, and inverter inside the filter inductance, can store a certain amount of electric energy. When the inductor flows through the current, there will be a magnetic field. When the magnetic field of the current passes through the magnetic core, the current magnetic field will break the equilibrium state of the "magnetic domain" and make the "magnetic domain" tend to the direction of the external magnetic field, resulting in the magnetic field of the core at this time. The process of the core magnetic field from scratch is actually the process of inductive storage of magnetic field.
Inductance is a component formed by enameled wire wound on an insulating skeleton or magnetic core. When the coil is energized, can produce a magnetic field in the surrounding, when through the current communication ingredients, fields changing, according to the principle of electromagnetic induction, the change of magnetic field lines and can produce inductive electromotive force on both ends of the coil, but the direction of the electromotive force and the original electromotive force in the opposite direction, and to hinder the current changes.
It can be seen that the main function of inductance is to hinder the change of current. As the current increases, it blocks the increase and stores some of the energy through the magnetic field. When the current is reduced, it blocks the reduction of the current in the circuit and releases the stored energy to maintain the current. Because the inductor has the property of storing energy, it has the function of filtering and delay.
Photovoltaic off-grid system, the output power is determined by the load. When a motor and other inductive load is started, a very large current is needed in a short time, and these energies cannot be provided by photovoltaic and battery. If the overload output of lithium battery is carried out in a short time, it will cause an explosion. However, the capacitor, inductor, transformer in the inverter can store power, but also a short time to magnify several times the output without damage.