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The Mitsubishi A500 series delivers a major leap in dynamic performance to 120:1 speed control range in drive mode and 25:1 in regenerative braking mode without encoder feedback.
At low speeds the A500 series delivers unrivalled smoothness with torque ripple under 5 per cent a 3 Hz. Used with a motor fitted with encoder feedback, speed control range extends to 1000:1, speed variation range falls to 0.02 per cent and the A500 series can deliver short-term zero speed holding torque of 150 per cent.
On-line Auto Tuning (OLAT) continuously re-optimises control as the motor temperature or other parameters change and ‘soft' PWM control greatly reduces acoustic noise.
A500 series features:
The ability to maximize inverter performance New levels in drive performance have been achieved thanks to the use of advanced flux vector control, an original technology developed by Mitsubishi. * 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 to 60Hz, driving mode) * Combining this function with a motor equipped with PLG feedback improves high-precision operations still further (built-in option FR-A5AP). - Speed control range .......... 1:1000 (driving mode) - Speed variation rate .......... +/-0.02% (driving mode) - Zero speed holding torque .... 150% (short time rating) * 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. Less than half that of a conventional Mitsubishi inverter at 1 Hz. * Further improving the responsiveness of current detection has reduced the occurrence of trips arising from over-current. * The addition of a number of new functions such as PID control and brake sequence function has made it possible to handle various applications. * Up to three option cards can be mounted internally * Network connection with a PLC is possible, e.g. Control & Communication Link (CC-Link).
Simple operation and maintenance * The FR-DU04 control panel with simple operation is provided as standard on all models. Parameter setting values also can be stored by FR-DU04. * The FR-PU04, LCD parameter unit with backlight is available as an option. (8 different languages are available on this unit.) * Removable control terminal block makes maintenance easier. * The life of the cooling fan has been extended by the use of ON/OFF control, and also replacement is easier.
Environment friendly * In addition to the conventional low-noise mode, Mitsubishi has developed its own original Soft-PWM control method which suppresses the increase in acoustic noise and limits RFI noise to minimum levels similar to those of the Mitsubishi FR-Z Series inverter. * A compact and light weight direct current reactor (DCR) can be connected to units of all capacity (0.4K to 55K). It is also possible to connect a high power factor converter (FR-HC) that comply with Japanese harmonic guidelines (conversion factor: K5=0). * Combining with the optional EMC filter makes it easy to comply with European EMC Directives.
Global specification * Comply with UL, cUL and EN (Low Voltage Directive) as standard. * The optional FR-PU04 parameter unit supports 8 languages. * NEMA1 compliance is standard up to 22K. * IP40 compliance up to 22K with the optional cover. * Open network such as DeviceNet and Profibus-DP are available. * The communication standard RS-485 is built-in. * Sink/Source logic is selectable.
A500 series technical specification
V/F control or Advanced magnetic flux vector control
Power supply voltage
200V class ... 3-phase 200 to 220V50Hz, 200 to 240V60Hz (0.4K to 22K) 200V class ... 3-phase 200 to 220V50Hz, 200 to 230V60Hz (30K to 55K) 400V class ... 3-phase 380 to 480V50Hz/60Hz (0.4K to 55K)