Frequency converters are power conversion devices. The frequency converters are going to convert basic fixed-frequency, fixed voltage sine-wave power towards a variable-frequency and variable-voltage output being used for controlling the speed of the induction motors.
The main function of a frequency converter for aquatic applications would be in providing energy savings. By having to control the speed of the pump than the case of flowing through by using throttling valves, energy savings actually is substantial. Speed reductions of 20% could actually lead to 50% of energy savings.
A frequency converter is available in different types and this can likewise offer the best possible method in matching pumps and fan flow rates to system requirements. Frequency converters are in fact usually used. This will convert the standard plant power to an adjustable voltage and frequency to power AC motors. Frequencies that are applied to the AC motor will determine the motor speed. An AC motor in fact are same standard motors which in fact could be connected to the AC power line. Also, through incorporating the bypass starters, the operation could be maintained even when the inverter would fail.
There are also added benefits of frequency converters like an increased bearing and pump seal life. Through maintaining the pressure that’s needed in the pump in satisfying system requirements, pump will not be subjected towards any high pressure. This would then help the components in lasting longer. The same benefits also could be obtained from fans which have been operated by frequency converters.
To get the best efficiencies as well as reliability, many specifiers which acquires detailed information from manufacturers on frequency converters diagnostic capabilities, efficiency, requirement on maintenance and its general operational features. They will then make a detailed analysis in order to know which system would actually give out the best possible return for the investment.
Not only will it give energy saving features and getting better process control because there are also some other benefits that it can offer like:
Frequency converters could be used to control process pressure, flow or temperature and you don’t have to use a separate controller. The suitable sensors and electronics likewise are being used to interface a driven equipment with a frequency converter.
The maintenance costs also could be lowered because lower operating speeds could result to longer life for the motors and bearings.
With the maintenance of such devices, it also helps in eliminating throttling dampers and valves on associated controls.
With a controlled ramp-up speed on liquid systems, it helps in eliminating water hammer issues.
The case of the frequency converter limiting torque on the user-selected level can in fact protect driven equipment that can not tolerate excessive torque.