Fuji Electric’s FRENIC-MEGA drive series are high performance, multifunctional inverters providing the industry’s highest performance for three-phase motor applications. They offer expanded power ratings and flexible configurations that support 1/2 HP through 1000 HP motors. They are designed for 24/7 operation with embedded motor protection and critical maintenance functions.
Fuji Electric's FRENIC-MEGA continues to provide the highest level of quality, robust design, easy to use interface, and competitive price for general-purpose industrial drives. Additionally the FRENIC-MEGA series offers more high-performance features and functions that are typically only found on “high-end” drives allowing one product family to cover a broader range of applications.
The FRENIC-MEGA series includes a common interface, common programming and industrial network connectivity and is exceptionally suited for industrial applications where standardizing on one product across a facility can lead to increased productivity.
Ideal for highly accurate control such as positioning
PG vector control * This option card is sold separately.
Effective in providing highly accurate control for applications such as printing presses.
Speed control range: 1:1500
Speed response: 100Hz
Speed control accuracy: ±0.01%
Current response: 500Hz
Torque accuracy: ±10%
* The above specifications may vary depending on the environment or conditions of use.
Fuji’s original dynamic torque vector control has further evolved.
Besides the dynamic torque vector control, the inverter is equipped with the motor constant tuning for compensating even a voltage error of the main circuit devices and the magnetic flux observer of a new system. This allows a high starting torque of 200% even at a low-speed rotation of 0.3Hz.
Improved durability in overload operation
The inverter performs short-time acceleration and deceleration with the maximum capacity by extending the time specification of overload current ratings compared with our previous models. This improves the operation efficiency of cutting machines or conveyance equipment.
Overload durability: 200% for 3 sec and 150% for 1 min.
The standard model is available in two specifications concerning the operational load.
| Classification |
Overload current rating |
Major use |
| HD (High duty) spec |
200% for 3 sec, 150% for 1 min |
Operation under heavy load |
| MD (Middle duty) spec |
150% for 1 min |
Operation under constant torque load |
| LD (Low duty) spec |
120% for 1 min |
Operation under light load |
Expanded capacity for the braking circuit built-in type
A braking circuit is built in the 22kW or smaller models as a standard feature. These inverters are applicable to machines that use regenerative loads such as a vertical conveyance machinery.
(7.5kW or smaller models also incorporate a braking resistor.)
* Inverters with built-in braking circuit are available on request for 30kW to 160kW models in 400V series.
Maximizing the performance of a general-purpose motor
Speed sensor-less vector control
Useful for the applications that require a high starting torque, such as a gondola type multi-level car parking tower.
Speed control range: 1:200
Speed response: 20Hz
Speed control accuracy: ±0.5%
Current response: 500Hz
Torque accuracy: ±10%
Improved reaction to the fluctuation of impact load
When a load fluctuation occurs, the inverter can provide a torque response in the class-top level. It controls the flux to minimize the fluctuation in the motor speed while suppressing the vibration. This function is best suited for the equipment that requires stable speed such as a cutting machine.
Quicker response to the operation commands
The terminal response to the operation commands has had an established reputation. FRENIC-MEGA has further shortened this response time, achieving the industry's top response time.
This function is effective in shortening the tact time per cycle in processes which include frequent repetitions.
Convenient function for operations at the specified speed
The pulse train input function is equipped as standard.
It is possible to issue the speed command with the pulse train input (single-phase pulse and a sign of command value) from the pulse generator, etc. (Maximum pulse input frequency: 100kHz)
Ratio operation
The ratio operation is the function particularly convenient for adjusting two or more conveyance systems. The ratio of the main axis speed to the two or more trailing axes can be set as a frequency command. On the machine that handles load variation such as a conveyance machine, the conveyance speed can be adjusted easily.
Thorough protection of the braking circuit
The inverter protects the braking resistor by monitoring the braking transistor operation. The inverter outputs a dedicated signal for the detection of the braking transistor failure. A circuit for shutting off the input power supply must be provided outside of the inverter. When this signal is output, the power is shut off; thus protecting the braking circuit.
Optimum function for preventing an object from slipping down
The reliability of the brake signal was increased for uses such as vertical conveyance.
Conventionally, the current and frequency values have been monitored when the brake signal is output. By adding a torque value to these two values, the brake timing can be adjusted more easily.
Dancer control function optimum for winding control
The PID value, calculated by comparing the target value and the feedback value, is added to or subtracted from the reference speed. Since the PID calculator gain (in proportional range) can be set to a low value, the inverter can be applied to the automatic control system that requires quick response such as a speed controller.
More functions are available to meet various requirements
(1) Analog inputs: voltage input through 2 terminals with polarity, current input through 1 terminal
(2) Slow flowrate level stop function (Pressurized operation is possible before slow flowrate operation stop.)
(3) Non-linear V/f pattern at 3 points
(4) Dummy failure output function
(5) Selection of 4 motors
(6) S-shape accel./decel. range setting
(7) Detecting disconnection of the PID feedback
Advanced network function
RS-485 communications is possible as a standard function (terminal base).
Besides the port (RJ-45 connector) shared with the keypad, an additional RS-485 port is provided as a standard function. Since the interface is connected through the terminal strip, multi-drop connections can be easily made.
Designed life 10 years
The designed lives of the various consumable parts inside the inverter have been extended to 10 years, which also extends equipment maintenance cycles.
The conditions used for the calculation of the parts' life are: an ambient air temperature of 40°C and under the load rate of 100% (HD spec) or 80% (LD spec) * The design life is a calculated value and is not guaranteed.
Full support of life warnings
The inverter is equipped with the functions for facilitating the maintenance of the equipment.
Compliance with RoHS Directives
MEGA complies with European regulations that limit the use of specific hazardous substances (RoHS) as a standard. This inverter is environment-friendly as the use of the following six hazardous substances are restricted: Lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyl (PBB), and polybrominated biphenyl ether (PBDE)
About RoHS:
The Directive 2011/65/EU, promulgated by the European Parliament and European Council, limits the use of specific hazardous substances included in electrical and electronic devices.