What is Frequency Convertor ?
A frequency converter is a power conversion device. The frequency converter converts a basic fixed-frequency, fixed voltage sine-wave power to a variable-frequency, variable-voltage output used to control speed of induction motors.
Why do we need Frequency Convertor ?
Basic function of a frequency converter in aquatic applications is to provide energy savings. By controlling speed of a pump rather than controlling flow through use of throttling valves, energy savings can be substantial. By way of example, a speed reduction of 20% can yield energy savings of 50%. The following describes speed reduction and corresponding energy savings. In addition to energy savings, impeller, bearing and seal life is greatly improved.
Frequency Convertor is available in many different types, it offer optimum method for matching pump and fan flow rates to system requirements. Frequency converter is most commonly used. It converts standard plant power (220 V or 380 V, 50 Hz) to adjustable voltage and frequency to power AC motor. The frequency applied to AC motor determines motor speed. The AC motors are usually same standard motors that can be connected across AC power line. By incorporating by pass starters, operation can be maintained even if inverter should fail.
To obtain maximum efficiency and reliability, many specifiers obtain detailed information from manufacturers on frequency converter efficiency, required maintenance, diagnostic capabilities within frequency converter, and general operational features. Then, they make detailed analysis to determine which system will give the best return on their investment. To know more about different types of Frequency Convertor click on these pictures.
ADDITIONAL BENEFITS OF FREQUENCY CONVERTERS
In addition to energy savings and better process control, frequency converters can provide other benefits:
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A frequency converter may be used for control of process temperature, pressure or flow without use of a separate controller. Suitable sensors and electronics are used to interface driven equipment with frequency converter.
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Maintenance costs can be lowered, since lower operating speeds result in longer life for bearings and motors.
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Eliminating throttling valves and dampers also does away with maintaining these devices and all associated controls.
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A soft starter for motor is no longer required.
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Controlled ramp-up speed in a liquid system can eliminate water hammer problems.
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Ability of a frequency converter to limit torque to a user-selected level can protect driven equipment that cannot tolerate excessive torque.
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