FR-A540-0.4K - Frequency inverter - MITSUBISHI

The Culmination of Mitsubishi’s Expertise Reaches into the Realms of Advanced Technology Expanding the Potential of Inverters

Announcing the FR-A500 Series, a new line of advanced inverters that combines Mitsubishi Electric’s original technology with the benefits of its vast pool of accumulated expertise. Beginning with advanced magnetic flux vector control, which allows high-precision operations at ultra-low speeds, Mitsubishi has mastered many aspects of advanced technology to equip this series with performance of the highest order. With their astonishing top-level specifications, this new series opens up an entirely new area of potential for inverters in the 21st Century. 

■ Advanced Flux Vector Control

New levels in drive performance have been achieved thanks to the use of advanced flux vector control, an original technology developed by Mitsubishi.

● High-precision Operations without a PLG

The units feature a RISC processor which is used for on-line auto tuning, turning the motor quickly when starting. This allows it to perform high-precision operations that are unaffected by motor temperature, as well as stable high-torque operation from ultra low speeds. Speed control range: 1:120 (0.5~60Hz, driving mode) Using the auto tuning function, high precision operation is possible with motors from all over the world.

● Boost Performance even further with PLG feedback

Combining this function with a motor equipped with PLG feedback improves high-precision operations still further (builtin option FR-A5AP).

* Use an inverter that is one rank higher than the motor capacity. Speed control range: 1:1000 (driving mode) Speed variation rate: ±0.02% (driving mode) Zero speed holding torque: 150% (short time rating)

■ Smart Driver

Uneven rotation at low speeds has been greatly improved by the use of a smart driver (a newly developed ASIC) which directly monitors and controls the main circuit's status.

• Uneven rotation: less than half that of a conventional Mitsubishi inverter at 1 Hz

■ High-response Current Limit

Further improving the responsiveness of current detection has reduced the occurrence of trips arising from overcurrent. This makes it possible to deal more effectively with the momentary large currents that occur when starting a reverse coasting motor or when switching an MC ON and OFF on the inverter output.

■ New Functions

The addition of a number of new functions has made it possible to handle various applications.

Some examples are:

• Power failure deceleration stop function → Rotary cutters, etc.

• PID control → Air-conditioning, etc.

• Brake sequence function → Conveyors, etc.

• Commercial power supply inverter switch-over sequence function → Pumps, etc.