AC Inverters

AC Drives

AC Inverter Drives in the UK with SDS Drives

An AC drive is a device that is used to control the speed of an electric motor. The speed is controlled by changing the frequency of the electrical supply to the motor. The three-phase voltage in the national electrical grid connected to a motor creates a rotating magnetic field in it. The rotor of the electrical motor will follow this rotating magnetic field.AC drives are used to drive the AC motor especially three phase induction motors because these are predominant over other motors in most of the industries. In industrial terms, AC drive is also called as variable frequency drive (VFD), variable speed drive (VSD), or adjustable speed drive (ASD). Though there are different types of VFDs (or AC drives), all of them work on the same principle that converting fixed incoming voltage and frequency into variable voltage and frequency output. The frequency of the drive determines the how fast motor should run while the combination of voltage and frequency decides the amount of torque that the motor to generate.

A VFD is made up of power electronic converters, filter, a central control unit (a microprocessor or microcontroller) and other sensing devices.The ac drive controls the speed of the pump and fan by changing the electrical energy supplied rather than damping the air- or water flow. It is like reducing the speed of a car by pressing less on the accelerator instead of using the brake to slow down the speed. The payback time of an AC drive is typically one year or less.

Other benefits of using AC drive to control the speed of fan or pump are:
- Smooth ramp up and down causes less stress to the mechanics of fans and pumps and to air ducts and water piping.
- Slowing down the speed rather than damping the output will result in lower noise levels.
- By letting you decide the best equipment for your application, providing the AC drive fits that choice and supporting you every step along the way, we help you engineer the best possible AC drive solutions and find the optimum outcome for your challenges without compromises.

Get in touch with SDS Drives today and let us help you with our AC Drive solutions.

Tel: +44 (0)1179 381800


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