Inverter operation at instantaneous p...

When performing the automatic restart after instantaneous power failure, input the operation signal (STF or STR) and selection of automatic restart after ins... More Details >>

Calculation of inverter acceleration ...

Refer to the Technical Sheet No.23 (Capacity Selection and Continuous Operation) for reference for selection. Optional capacity selection software is also pr... More Details >>

Inverter's heat generation quantity

The heat generation quantity while the inverter is outputting the rated current is as follows:1. FR-A520-3.7K: 230 W2. FR-A520-7.5K: 420WThe heat generation ... More Details >>

Power factor improving effect by option

Installing the high power factor converter brings the power factor improving effect of 99% or higher.Therefore, when the high power factor converter is used,... More Details >>

Power supply phase loss

The following is the case for the FREQROL-A500 series:1. When the R phase or S phase is lost, the inverter stops since it loses the control power supply.2. W... More Details >>

Brake unit selection

Since the FR-A540-0.75K has a brake transistor for resistor regenerative driving inside the inverter, you do not need to use BU. Just remove the jumper from ... More Details >>

Output phase loss protection error

- How to find out lost phaseMeasure the three-phase current when the error has occurred.The phase with a small (or no) phase current is lost.- Possibility of... More Details >>

Term definition and advanced magnetic...

1. Maximum torque available for output from the motor when combined with an inverter for a short period of time (1 minute or less). 　　It depends on the contr... More Details >>

Simple torque control using stall pre...

Basically, torque control cannot be performed. Instead, control speed to adjust the winding torque. It is possible to use the current limit function to preve... More Details >>

What happens if reset occurs during o...

This is because when the inverter restarts while the motor is coasting, an overcurrent trip can occur during the restart process. However, the recent types o... More Details >>