Brake resistor

Connecting the brake resistor allows for quick deceleration because the regenerative power is processed. (The brake torque increases.)Therefore, when an exte... 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 >>

Amount of heat

The inverter (FR-A520-5.5K) itself generates approximately 310 W of heat. This is the amount generated under the inverter rated current 100% load. Since the ... More Details >>

Winding control

As an example, you can use an inverter to feed the cord at the constant speed under dancer control using a combination of the deviation detector and deviatio... 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 >>

Controlling multiple VVVFs via communication from personal computer

To control multiple inverters using arbitrary signals (4 to 20 mA) simultaneously, it is recommended to connect the signals (4 to 20 mA) in series. (This doe... More Details >>

FR-A800

No. Check the parameter setting of the A500(L), and then adjust the parameter setting of the A800 to those of the A500(L). For the details, refer to the repl... More Details >>

Soft-PWM

The inverter uses PWM control to change the output voltage and frequency to vary the motor speed. PWM stands for Pulse Width Modulation. Voltage is chopped i... More Details >>

Heat generation quantity of FR-A500

The heat generation quantity of the FR-A520-5.5K is 310 W. (Reference: The heat generation quantity of the FR-A220E-5.5K is 330 W.) For other capacities, ref... More Details >>

Clutch connection of load

Since a large load is applied to the motor when the electromagnetic clutch turns on, overcurrent may occur if the load is heavy. To ensure that the rated cur... More Details >>