Frequency Converters: Importance and Applications
Today, the term "frequency converter" is becoming increasingly familiar not only to electrical professionals but also to a wide range of enterprises and households. The implementation of frequency control methods for electric motors has become a common occurrence, and the possibilities they provide open new horizons for the automation of various systems involving synchronous or asynchronous electric motors. With the latest technologies, converters are becoming more accessible, compact, and reliable.
The main principle of the frequency control method for electric drives is that, unlike traditional systems where the motor can only operate in two modes - "on" and "off", the use of a frequency converter enables smooth adjustment of the rotation speed and torque by changing the voltage at the input of the electric motor.
The results of applying frequency control are impressive:
- significant reduction in electricity consumption;
- decrease in starting loads;
- additional automation opportunities;
- reduction of emergency situations;
- simplification of maintenance;
- improvement of system performance indicators.
Examples of the Application of Frequency Control
Let’s consider several areas where frequency converters are used most actively.
Pumping Equipment
Water supply systems are a vivid example of effective frequency converter application. Here are some examples where their use optimizes the operation of pumping equipment:
- wells;
- lifting pumps;
- booster pump stations;
- filtration systems;
- boiler houses and heaters;
- equipment for the food industry;
- closed-loop water circulation systems.
Pressure control in pipelines and production processes was previously done using mechanical devices, which complicated maintenance and led to frequent failures. The frequency regulation method allows stabilizing the pressure at the pump's output by installing sensors that relay data to the converter, which adjusts the voltage parameters.
Ventilation and Air Conditioning Systems
In forced air systems, frequency control allows:
- controlling temperature and humidity;
- adjusting the load on the electric motor;
- monitoring air pollution.
This significantly enhances the system's operational efficiency, reducing energy consumption and potential failures.
Conveyor and Transport Systems
Since these systems are characterized by high mechanical loads, the application of a frequency converter ensures:
- soft start and stop;
- stability of rotation speed;
- high energy efficiency.
Industry, Transport, and Agriculture
Frequency converters are widely used in the manufacturing industry, agriculture, and transport. By adding them to electric motors, significant energy savings can be achieved while increasing equipment reliability.
Modern solutions in the field of frequency control for electric drives significantly improve the efficiency of mechanisms and enable reduction of energy costs, which supports environmental cleanliness.
Thus, frequency converters open new prospects for various sectors, enhancing their efficiency and reliability.