เพื่อนช่างแสนดี (techno100,000D): VFD

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What is a VFD ?

Variable Frequency Drive (VFD) is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor. Other names for a VFD are variable speed drive, adjustable speed drive, adjustable frequency drive, AC drive, microdrive, and inverter. Frequency (or hertz) is directly related to the motor’s speed (RPMs). In other words, the faster the frequency, the faster the RPMs go. If an application does not require an electric motor to run at full speed, the VFD can be used to ramp down the frequency and voltage to meet the requirements of the electric motor’s load. As the application’s motor speed requirements change, the VFD can simply turn up or down the motor speed to meet the speed requirement.

What is an Inverter? – Inverters offer speed or torque control of electric motors.

Cr: Gloogle.com

Maybe you have walked past without noticing them or maybe you know exactly how many you have, either way electric motors play an important role in our everyday lives which most of us are unaware of but, they move and run most things we need for business and pleasure.

All these motors consume electricity so need a corresponding amount of energy to provide the torque or speed needed. If the torque or speed is too high or low, mechanical controls are used to control output. A motor’s speed should match exactly what is required by the process, otherwise the result is inefficiency with a lot of wasted materials and energy.

Not knowing how to control motors can mean a lot of energy gets wasted which isn’t good for any business. A way to control these motors, which not only saves energy, but improves productivity and reduces maintenance costs, is to use an inverter.

What is an Inverter?

So what is an inverter? Ours are sometimes called AC drives, Variable Speed Drive (VSD) or Variable Frequency Drives (VFD). The correct term is frequency converter. They sit between the electrical supply and the motor. Power from the electrical supply goes into the drive. The drive then regulates the power which is then fed to the motor. Inside the drive, the input power is run through a rectifier that converts the incoming AC power to DC power.

DC power is then fed into capacitors inside the drive to smooth out the electrical wave form which provides a clean power supply for the next step. Power then flows from a capacitor to an inverter which changes the DC power to the output AC power that goes to the motor. This step allows the drive to adjust the frequency and voltage that is supplied to the motor based on your current process demands. This means the AC power is run to the speed or the torque of the demands needed. This is why you can save large amounts of money using our AC drives.

ACS880 control with Android

ACS880 control with Android

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ACS880 series industrial drives by ABB

Simplifying your world without limiting your possibilities. The new ACS880 series industrial drives are all-compatible, meaning that the drives are designed to tackle any motor-driven application, in any industry, whatever the power range. The drives can be flexibly connected to automation networks.