Variable frequency drives are power conversion devices that can be used as AC drives, DC drives, and servo drives. Motor systems used in industrial applications consume an estimated 25% of the world's electricity. When these motors are combined with variable frequency drives for centrifugal load service, their efficiency is improved. With the advancement of power electronics technology, the cost and size of variable frequency drives have decreased while their performance has improved. Throughout the world, variable frequency drives are used in multiple end-use sectors, including infrastructure, industrial, power generation, and oil and gas. The increasing global focus on energy efficiency, coupled with an increasing awareness of the vvvf drive advantages, is driving their adoption in these sectors.
Control of Starting Currents: One of the vvvf drive advantages is their ability to start motors with zero voltage and frequency, which allows for checking the winding bending and heating of motors at any time. This helps extend the lifespan of the motor.
Reduced Power Line Interference: Any voltage sag in power lines can have adverse effects on voltage-sensitive equipment such as switches, sensors, and computers. The use of variable frequency drives can eliminate voltage sags.
Low Power Requirements at Start-Up: The power required to start AC motors across the line is much higher than the power required with variable frequency drives. When industrial customers start these motors during peak hours, they may be charged a surcharge. However, because variable frequency drives require lower starting power, this problem can be solved.
Helps Control Running Speed and Acceleration: Applications such as bottling lines for easy-to-tip products benefit significantly from gradually increasing power. This allows the conveyor to smoothly accelerate rather than jerk suddenly to full power. They also allow the speed to be remotely controlled by the controller. Control is speed, and the acceleration of the vvvf drive advantages is a major advantage in the industrial production process.
Limiting and Adjusting Torque: Drives can limit and adjust the size of torque, so AC motors never exceed this limit. The vvvf drive advantages can protect machines from damage and protect processes or products.
Energy and Cost Savings: The regulation of variable frequency drive is usually lower than the running speed of pumps and motors, which can reduce the energy consumption of motors running at constant speed at the same time. In addition, it eliminates the need for mechanical drive components, which also helps reduce overall costs.