Overcurrent at low speed

"8" display in offline auto tuning means forced stop by the operator. This means that you stopped operation before tuning completes. 　With this forced stop, ... More Details >>

FR-E520 operation mode (Pr.79) selection

The FR-E500 manufactured before May 1998 behaved as you mentioned, and the potentiometer becomes unavailable once you set the frequency on the operation pane... More Details >>

Connection with pole change motor

Since the inverter allows for changing speed, fix the number of poles when using the pole change motor. It is recommended to fix the number of poles to four ... More Details >>

Inverter operation against power supply voltage drop

Depending on the load current, undervoltage protection (UVT) or instantaneous power failure protection (IPF) is triggered to shut off the inverter output, an... More Details >>

Output current detection

The FR-A500 series that is the successor of the FR-A200E series has a function similar to output current detection of the FR-E500. Consider using the FR-A500... More Details >>

Encoder feedback speed accuracy

The speed variation rate is as follows: 　- Encoder feedback control: ±0.2% - Vector control: ±0.02% (mentioned in FR-A5AP Instruction Manual) More Details >>

Vector motor

The constant-torque motor and vector motor are the induction motors, which consist of the stator core, gap, and rotor core. For the constant-torque motor, th... More Details >>

Countermeasure against the instantaneous power failure with the inverter

The power cannot be supplied to the control power supply separately for the FR-A024/A044 and small type FR-E500. Therefore, the UPS is not available. More Details >>

RS-485 communication

It is available since June, 2007. The model is FR-E7TR. More Details >>

Noise filter

The noise filter is not built-in the FR-E700 series. It is built in the FR-A700/F700 series with the 55K or lower capacity. More Details >>