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Frequency converters

A frequency converter is used to regulate the frequency and thus the speed of an AC motor. Frequency converters are increasingly used in conjunction with motors to improve performance or efficiency at startup and varying operational modes.

Less energy consumption with frequency converters

The frequency converter is usually the least energy-consuming part of the overall system and can minimise the energy loss from the motor. A frequency converter can improve efficiency in many systems, because it will adapt the motor speed to the need.

Advantages of frequency converters:

  • Soft start/stop enables dimensioning compared to the normal operating situation. This reduces the loss in the transmission which would otherwise have to be oversized to stand the hard start/stop. It also reduces wear on motors, transmissions and machinery.
  • Can for shorter periods extend operating range by running motors up to a higher speed.
  • Frequency converters are making a good dynamic performance, which can be used in machines with precise control of speed. May run in an open loop without speed sensor.
  • Contains an incorporated microprocessor providing a variety of facilities - like field bus communication, local PID control, inputs from different measuring points, electricity meters and ramp up/down functions.
  • Easy to put into operation due to integrated instructions via the operator panel.
  • Stocked item which may be fitted to existing motors.