The FR-A800 high performance frequency inverters from Mitsubishi Electric UK combine innovative functions and reliable technology with maximum power, economy and flexibility.  FR-A800 is particularly well suited to demanding applications like extruders, centrifuges and winding machines.

For applications like cranes, lifting gear, and high-bay warehousing systems the FR-A800 delivers  smooth cargo handling work at low speed and high torque for the slow and stable movements required for heavy objects.

Sensorless vector controls

Even without encoders the FR-A800 continuously calculates the optimum magnetic flux for every operating state. A complex motor model and the specifications of the connected standard asynchronous motor are used to improve torque constancy across an extended speed range.

For example, the system can generate torque of up to 200% from a very low starting frequency of just 0.3 Hz. Known as real sensorless vector control (RSV), this Mitsubishi Electric technology can be used to regulate the torque. This makes it possible to use inverters for many applications that were previously the exclusive domain of DC or closed-loop vector drives.

Accurate line control is necessary for the machining of products such as paper, thread, wires, all kinds of sheet, and tape. FR-A800 is designed respond rapidly to changes in line speed and suppress the occurrences of winding unevenness on the production of consistently high-quality products.

Precise speed and torque

When operated with an encoder, the FR-A800 drives deliver ultra-precise speeds across the entire control range (precision ±0.01 %) and extremely fine torque control (±10 % precision and ±5 % repeatability). This outstanding performance makes it possible to switch from simple servo systems to inexpensive frequency inverter systems.

Cutting-edge machine tools are handling harder and thinner materials, and FR-A800 is capable of controlling accurate high-speed rotation essential for fine machining and precise cutting of hard and difficult-to-grind materials.

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