To Next PageTo Next PageWhy is my Mitsubishi Electric Inverter motor vibrating?
If hunting (vibration or acoustic noise) occurs in the motor or the machine, it might be due to a speed control gain or torque control gain that is too high, or incorrect motor wiring. Try setting Pr.820 lower and Pr.821 higher, or setting Pr.824 Torque control P gain 1 (current loop proportional gain) lower. Also, check the wiring.
Why is the machine movement unstable with my Mitsubishi Electric FR-E820-0008 Inverter?
If the machine movement is unstable, it could be due to the speed control gain not being suitable for the machine or a slow response due to the inverter's acceleration/deceleration time setting. Try adjusting Pr.820 and Pr.821 or setting the optimum acceleration/deceleration time.
What to do if Mitsubishi Electric Inverter speed does not accelerate to the command speed?
If the speed does not accelerate to the command speed, it could be due to torque shortage, causing the torque limit to operate, or because only P (proportional) control is performed. To resolve this, try raising the torque limit or increasing the capacity. If only P control is being performed, select PI control, as speed deviation occurs under P control when the load is heavy.
Why does the motor speed fluctuate with my Mitsubishi Electric FR-E820-0008 Inverter?
If the motor speed fluctuates, it may be due to variations in the speed command, torque shortage, or a speed control gain that is not suitable for the machine, potentially causing resonance. Check that the speed command sent from the controller is correct and take EMC measures. You can also try setting Pr.72 lower and Pr.822 Speed setting filter 1 higher. Additionally, raising the torque limit might help. If the speed control gain is the issue, adjust Pr.820 Speed control P gain 1 and Pr.821 Speed control integral time 1.
Why is the acceleration/deceleration time different from the setting on my Mitsubishi Electric FR-E820-0008 Inverter?
If the acceleration/deceleration time is different from the setting, it could be caused by torque shortage or a load inertia that is too high. To solve this, raise the torque limit or set an acceleration/deceleration time suitable for the load.
What causes rotation ripple during low-speed operation on a Mitsubishi Electric FR-E820-0008?
If rotation ripple occurs during low-speed operation with your Mitsubishi Electric Inverter, it could be due to a high carrier frequency affecting the motor rotation or a speed control gain that is too low. Try setting Pr.72 lower or setting Pr.820 higher.
Why does the motor speed fluctuate on my Mitsubishi Electric FR-E820-0008 Inverter?
Motor speed fluctuation in your Mitsubishi Electric Inverter can occur due to several reasons. The speed command may be varying, which can be addressed by checking the speed command sent from the controller and implementing EMC measures, setting Pr.72 lower, or setting Pr.822 Speed setting filter 1 higher. Another cause could be torque shortage, requiring you to raise the torque limit. Finally, the speed control gain might not be suitable for the machine, potentially causing resonance; adjust Pr.820 Speed control P gain 1 and Pr.821 Speed control integral time 1 to resolve this.
What to do if hunting occurs in Mitsubishi Electric FR-E820-0008 motor?
If hunting (vibration or acoustic noise) occurs in the motor or machine connected to your Mitsubishi Electric Inverter, it could be due to several reasons. The speed control gain might be too high, requiring you to set Pr.820 lower and Pr.821 higher. Alternatively, the torque control gain could be too high; in this case, set Pr.824 Torque control P gain 1 (current loop proportional gain) lower. Finally, incorrect motor wiring can also cause hunting, so check the wiring.
Why Mitsubishi Electric FR-E820-0008 speed does not accelerate?
If the speed of your Mitsubishi Electric Inverter does not accelerate to the command speed, it could be due to torque shortage, causing the torque limit to operate. Raise the torque limit or increase the capacity to resolve this. Another possibility is that only P (proportional) control is being performed. Since speed deviation occurs under P control when the load is heavy, select PI control instead.
Why is the acceleration/deceleration time different on Mitsubishi Electric Inverter?
If the acceleration/deceleration time on your Mitsubishi Electric Inverter differs from the setting, it could be due to torque shortage. In this case, raise the torque limit. Alternatively, the load inertia might be too high, requiring you to set an acceleration/deceleration time suitable for the load.
General| Series | FR-E800 |
|---|---|
| Model | FR-E820-0008 |
| Input Voltage | 200-240V AC |
| Frequency | 50/60 Hz |
| Overload Capacity | 150% for 60 seconds |
| Cooling Method | Fan Cooling |
| Enclosure Rating | IP20 |
| Output Voltage | 200-240V AC |
| Phase | 3-phase |
| Control Method | V/F control |
| Protection Features | Overcurrent, overvoltage, undervoltage, overload, overheating, short circuit, ground fault |
| Ambient Temperature | -10 to +50°C (14 to 122°F) |
| Storage Temperature | -20 to +65°C (-4 to 149°F) |
| Humidity | 95% RH or less (non-condensing) |
| Altitude | Up to 1000 m |
| Vibration | 5.9 m/s² |
