Inverters-FREQROL-E Series　-FREQROL-E800- Energy saving

General-purpose motor (SF-PR)

The Mitsubishi Electric SF-PR high-performance energy saving motor conforms to the Japanese domestic Top Runner Standard (IE3 equivalent). Its energy-saving operation contributes reduction in the electricity charges, which in turn lowers the running cost.
Motor constants are stored in the inverter. Energy-saving operation can be started just by setting parameters.

PM motor (MM-GKR, EM-A)

The PM motor achieves even higher efficiency as compared to the general-purpose motor.
The setting for driving PM motors is enabled just by setting parameters.

Why is a PM motor so efficient?

• No current flows to the rotor (secondary side), and no secondary copper loss is generated.
• Magnetic flux is generated with permanent magnets, and less motor current is required.

Further energy saving operation is enabled by using IE3/IE4 induction motors or permanent magnet embedded (PM) motors.
FR-E800 inverters support both induction motors and PM motors, enabling step-by-step replacement of existing devices. Users can replace inverters first and then motors. There is no need to replace them all at once.

Advanced optimum excitation control

A large starting torque can be provided with the same motor efficiency under Optimum excitation control. Without the need of troublesome adjustment of parameters (acceleration/deceleration time, torque boost, etc.), acceleration is done in a short time. Also, energy saving operation with the utmost improved motor efficiency is performed during constant-speed operation.
When Advanced magnetic flux vector control is selected, Advanced optimum excitation control is available.

Energy saving monitoring

The energy saving effect can be checked using an operation panel, output terminal, or network.
The output power amount measured by the inverter can be output in pulses. The cumulative power amount can be easily checked.^*1

*1This function cannot be used as a meter to certify electricity billings.

Power regeneration function (optional)

While the motor rotates to drive the machine during power driving, the machine rotates the motor during regenerative driving, which results in energy saving since the motor serves as a generator which returns the power to the power supply.
By using the multifunction regeneration converter (FR-XC) as a common converter, the power returned from an inverter during regenerative drive can be supplied to another inverter, which in turn saves energy.
Only the FR-XC in power regeneration mode is available for the FR-E800-SCE.