Power regeneration contributing to energy saving

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. For example, when a power of 70 kW is required for power driving and a power of 30 kW is required for regenerative driving, the power consumption is reduced by 30%.

One of the two regeneration modes can be selected depending on the application.

Using regenerative power can increase power efficiency and reduce the CO2 emission (power consumption) of the equipment. This creates the new added value of contributing to carbon neutrality.

The FR-XC series converter can connect to up to 10 VFDs^*1 together, though its predecessor FR-CV series converter is designed to connect to up to 6 VFDs.
The power returned from a VFD during regenerative driving can be supplied to another VFD, saving the overall energy.
None of the VFDs requires a brake unit, which enables total space and cost reduction.

*1 If you want to connect 11 or more VFDs, contact your sales representative.

For power driving, the VFD supplies power. For regenerative driving, the FR-XC series converter returns power to the power supply. (In this mode, the FR-XC series converter cannot be used as a common converter.)
The capacity of the FR-XC series converter is selectable according to the regenerative power of the system. Thus, the compact converter is applicable for the regenerative power smaller than the VFD capacity, which contributes to space saving. (Refer to page 20 for selection.)
For example, if you use the 30 kW VFD and the regenerative power of your system is 5.5 kilowatts, you can choose the 7.5 kW converter instead of the 30 kW converter.
The converter with its harmonic suppression function disabled can be used in the power regeneration mode.

The regeneration mode is changed with the selection switch, and the harmonic suppression function is enabled or disabled according to the parameter setting.
A single FR-XC series converter can be used as a backup converter for different applications. (Use the converter in combination with the dedicated stand-alone reactor (FR-XCL) or the dedicated box-type reactor (FR-XCB).)