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Inverter is an electronic device that converts direct current (DC) power into alternating current (AC) power, and it is widely used in renewable energy fields such as solar power and wind power. An inverter is a direct current that converts direct current generated by solar panels or wind turbines into alternating current that can be used in domestic or industrial use. Empty and closed.

On-board inverter.

Inverters are an important part of renewable energy systems such as solar panels and wind turbines, and their power output and efficiency directly affect the performance and efficiency of the entire system.

The working principle of the inverter is to convert the DC power supply into AC power through the converter, filter and other components in the circuit. The inverter can automatically adjust the output voltage and bucket frequency according to the size of the input power to adapt to different electrical loads. The inverter can also realize grid interconnection and connect the power output of renewable energy to the grid to support and supplement the power supply of the state cracked grid.

The inverter is an important part of the current renewable energy power generation system, which has important application value and market prospects. With the continuous development and popularization of renewable energy technology, the performance and efficiency of inverters will also be continuously improved, making greater contributions to sustainable development and environmental protection.

Theoretical value: the time that a 12V 36A battery with a 12V 500W inverter can be used.

12 36 300 = hours).

48a can be used 12 48 300 = hours).

100a can be used 12 100 300 = early source 4 (hours).

Actual time such as spike slag = theoretical time power factor of the inverter.

The battery output is DC.

A conventional sine wave oscillator is sufficient for alternating current with a low power output.

Direct current, the peak value of the sine wave generated can be approachable, and the effective value is about. If you want to get a higher voltage, you can use a step-up transformer (you can use a step-down transformer to adjust the primary and secondary sides).

The sine wave oscillator can use a capacitive three-point oscillator, and the circuit is as follows:

In the figure, cc is a coupling capacitor, and a large capacitor can be used. The output frequency of the oscillator depends on C1, C2 and L.

f=1/[2π√（c1+c2）/（l*c1*c2）]

The kind of step-up transformer that needs to be wound by yourself, the circuit is very simple, but this transformer is not easy to find.

UPS is a kind of power electronic equipment that integrates digital and analog circuits, automatic control inverters and maintenance-free energy storage devices What are the types of UPS?

Backup UPS is our most commonly used, it has automatic voltage stabilization, power-off protection and other basic and important functions of UPS, although there is generally a conversion time of about 10ms, the alternating current output of the inverter is a square wave rather than a sine wave, but due to the simple structure and has the advantages of cheap and high reliability, it is widely used in microcomputers, peripherals, POS machines and other fields;

** UPS structure is more complex, but the performance is perfect, can solve all power problems, its significant feature is that it can continuously output pure sine wave alternating current without interruption, and can solve all power supply problems such as spikes, surges, frequency drifts, etc.; Due to the large demand, it is usually used in critical equipment and network centers and other environments with demanding power requirements;

Compared with the backup type, the modular UPS has a filtering function, strong anti-mains interference ability, the conversion time is less than 4ms, and the inverter output is an analog sine wave, so it can be equipped with network equipment such as servers and routers, or used in areas with harsh power environments; In particular, the UPS of the four-way MD series, which is far lower than the type, is a better choice that should be vigorously used by users.

The inverter is a part of UPS.

Alternating current to direct current. Turn off the direct current of the electrical components. Alternating current.

The working process is like a rectifier circuit, a flat wave circuit, a control circuit, and an inverter circuit.

1.Rectifier circuits.

Rectifier circuit function: AC power conversion, DC power supply, rectifier circuit is generally a separate block rectifier module.

2.Flat-wave circuits.

Flat wave circuit rectifier, rectifier DC voltage, including 6 times the frequency of the power supply, pulse voltage, external inverter, pulse generation current, DC voltage change, suppression voltage wave using electric capacitor, absorption pulse voltage (current), general frequency converter power supply, DC part of the main circuit margin, so power saving, the use of simple capacitor filtering flat wave circuit.

3.Control circuits.

The current variable frequency governor is basically controlled by 16-bit, 32-bit single-chip microcomputer or DSP control core.

The inverter voltage transmission frequency speed regulation device provides a control signal circuit, weighs the main control circuit, and the control circuit is composed of the circuit: frequency, voltage operation circuit, main circuit, voltage, current detection circuit, motor speed detection circuit, operation circuit, control signal is sent to the drive circuit and inverter motor protection circuit.

The inverter adopts the control type, that is, speed control, rejection control, PID or its type.

The inverter circuit is the opposite of the rectifier circuit, the frequency of the DC voltage conversion of the inverter circuit is determined by the AC voltage, so that the bridge and bridge power off device conducts and shuts off the three-phase phase difference of U, V and W at the transmission end, and the three-phase AC voltage with an electrical angle of 120°.