Inverters are devices that, due to the widespread use of electricity, are an essential element of almost every mechanism powered by electricity. The above gives rise to the thesis that even basic knowledge about inverters will allow in the future to locate the fault, independently purchase a new device adapted to the requirements of the damaged machine, or even replace it. What are inverters? How do they work? Which of the offered inverters are the best?
What is an inverter and what is it used for?
The inverter (VSD) allows you to change the amplitude and frequency of the mains voltage supplying the asynchronous electric motor, which allows you to change its angular rotation. Depending on the type inverters support three-phase ( three-phase inverters ) or single-phase ( single-phase inverters ) powered motors.
Industrial inverters are irreplaceable in every case where there is a need to increase the efficiency and efficiency of machines and devices powered by electricity.
Check out the offer of inverters at the Onninen wholesaler
Machines and devices using inverters:
lathes,
CNC machine tools,
Compressors,
Hand and table drills,
submersible pumps,
fans,
Belt conveyors.
The above list does not exhaust all possibilities. We just wanted to point out the huge ones the importance of inverters in the economy and everyday life, a clear example of which are the well-known trams.
Inverters are also used in popular photovoltaic installations , where there is a need to send the produced direct current to electrical sockets. These are devices that are of invaluable importance as a connection between two power systems: AC and DC.
The main division line of inverters is as follows:
Direct inverters;
Intermediate inverters.
Devices are further differentiated in terms of control method and power source.
Due to the control method, we distinguish:
Scalar inverters,
Vector inverters.
Division taking into account the power source:
Power inverters;
Voltage inverters.
The undoubted advantage of using inverters is a significant reduction in the level of power consumption necessary for the operation of electrical machines. This results in significant savings in enterprises and households.
Check out the offer of inverters at the Onninen wholesaler
How does the inverter work?
The inverter is responsible for the time course of the alternating current voltage. This concerns the form and quality of the output signal, which usually takes the form of a sinusoidal function comparable to the voltage curve generated by a synchronous generator.
Modern electronic inverters are able to provide clean, accurate sine wave output voltage and their efficiency can reach up to 98%. This result is close to the physically feasible limit.
The efficiency of the inverter is expressed as the ratio of the alternating current (AC) output power to the direct current (DC) input power.
η = P(AC) / P(DC)
Explanation of the meanings of the symbolism contained in the formula:
η – inverter efficiency
P – alternating current (AC) output power;
P – direct current (DC) input power.
By increasing or decreasing the voltage frequency, you can adjust the rotational speed and start of the machine. It is important that the voltage is proportional to the frequency.
TOP 5 best inverters
LS Electric G100 series frequency converter, 3-phase
LG repeater deserves attention due to its reliability and ease of installation resulting from its small dimensions. Communication is provided by the Modbus RTU/RS485 protocol. In addition, the inverter is equipped with an EMC C3 filter, LED keyboard, potentiometer and braking module.
VLT® Micro Drive FC-51 inverter 22 KW, 380 - 480 VAC, IP20
The second item on the list was the lack of an operating panel, which can be purchased separately.
The VLT® Micro Drive FC-51 inverter is characterized by reliability, simplicity of installation and operation and, most importantly, modern technological solutions that ensure that, despite its small size and simplified operation to a minimum, the VLT® Micro Drive FC-51 will meet the requirements of demanding applications. complex control program.
Three-phase inverter Uin = 3 × 400 V AC, Iwe = 26 A, Uwy = 3 × 400 V AC, Iwy = 25 A, Pmax = 11 kW
The F&F inverter is equipped with a 32-bit DSP processor. In this way, it was possible to ensure the implementation of advanced asynchronous control algorithms
three-phase motor in a short time, which results in high efficiency of the inverter.
DC1-345D8FB-A20CE1 inverter 2.2 kW 3-phase 400 V
The Eaton inverter is a modernized and expanded version of DC1, enriched with new solutions.
The DC1-345D8FB-A20CE1 inverter has:
Sensorless vector control;
Possibility to operate modern PM, BLDC, SyncREL engines
Greater resistance to environmental conditions thanks to the use of painted electronics boards.
VLT Micro Drive FC-51 inverter
Our ranking ends in fifth place VLT Micro Drive FC-51 inverter . This does not mean that this device is worse than the others. We simply could not use higher positions ex aequo.
We would like to add that the above list is subjective, which means that it may differ from others available on the Internet. We would like to remind you that our knowledge base is constantly updated, where you can find everything about broadly understood utility energy. We invite you to read.