The frequency inverters, which currently exist on the market, are installed to control motors in various plants and used. The frequency inverters, which currently exist on the market, are installed to control motors in various plants and used. Here the system function plays no role, the inverter is responsible only for the operation of the motor. He influenced the start-up operation, the operating speed and the braking without wear on moving parts, because the converter works purely electrically. All functions are combined in one unit and can be separately adjusted to ECU, and adapted to the needs. Thus single phase and three phase machines can be operated easily, irrespectively of the frequency. The task of the inverter is the change of in amplitude and frequency.

While the amplitude is converted to its height or strength and the frequency is changed in height. The interaction of the two conditions affect the excitement in the engine, so the speed is controlled. The advantage of This type of control is that it is very economical and little loss of energy. The method of frequency change direction is also relatively low-maintenance and caused only little or no additional costs. To ensure the functioning of the inverter, modern microcontrollers are used in the high-tech devices. These are very quick in response and can respond within microseconds to changes.

Furthermore, the chipsets are very resistant and can be programmed individually for each application and configured. This is important, if sometime an other drive is built or rebuilt. Then the inverter on the new parameters of the new engine must be set only and through reprogramming, this is done quickly. The different designs of the transmitter as with most devices there are there even when the frequency converters is a series of various designs and sizes. The size of the converter depends of the load to be controlled and the number of connected machines, so the overall performance Plant. The smallest sizes are intended for mounting on top-hat Rails and the largest listed as its own switching or control cabinet and are much larger in the building. In between, almost anything is possible and depends on the needs of the system and the requirements of the environment. A more attention should be paid to the cooling. First of all, heat is generated by the transformation of the input voltage and also a little temperature caused the power supply to the processor. Therefore should be sure, depending on the frequency converter is greater, the more important is the transfer of heat energy and compliance with the cooling. Small transducers are cooled only through openings in the housing, making them soft and quiet. Often additional fans are used with greater frequency converters. This is important for the longevity of the transmitter and the internal components.