Noise from motor at low speed

It is considered to be caused by inverter PWM control. It can be suppressed by raising the PWM carrier frequency (Pr.72), but the entire noise and leakage cu... More Details >>

Driving 200 V motor by 400 V inverter

A 400 V inverter does not operate when 200 V is supplied to it, therefore the motor does not rotate. A 200 V motor can be rotated by a 400 V inverter, howeve... More Details >>

Motor heat generation at low-speed operation

When using the FR-A540-3.7K in Advanced magnetic flux vector control, operating the motor continuously under the 100% torque at up to 3 Hz does not cause a h... More Details >>

Output current

Increasing the value of Pr.0 (Torque boost) increases the output voltage, and the output current also increases.Note that increasing this value too high puts... More Details >>

Changing parameters

Before you change Pr.7 and Pr.8, you must switch to the PU operation mode. Switch to the PU operation mode and change them. More Details >>

Speed change due to power supply voltage fluctuation

1. The output frequency satisfies the "control specification/frequency precision" even when the power supply voltage changes, but the output voltage cannot r... More Details >>

Suggestion for replacement of inverters

We do not offer book type inverters. Therefore, the S500 is recommended to replace the Z123 because of its compact design. If regenerative driving matters, c... More Details >>

TH3 terminal of the MT-BR5

The resistor unit MT-BR5 manufactured in February 2016 or later has output terminal TH3 (NC contact) as a fault output terminal. More Details >>

Combination of the FR-F800 and MM-EFS

Yes, it can. Set "12" or "112" to the MM-EFS capacity used for Pr.80 (Motor capacity) and Pr.998 (PM parameter initialization). More Details >>

FR Configurator2

No, it cannot. Purchase IQ-Works2 or FR Configurator2. Upgrading to from IQ-Works to IQ-Works2 is for a fee. More Details >>