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Why Mitsubishi Electric Inverter acceleration/deceleration time is different?
If the acceleration/deceleration time differs from the setting, it could be due to a torque shortage, so raise the torque limit. Alternatively, the load inertia might be too high; in that case, set acceleration/deceleration time suitable for the load.
How to stop hunting in Mitsubishi Electric 800?
Hunting, which manifests as vibration or acoustic noise, can occur due to several reasons. If the speed control gain is too high, set Pr.820 lower and Pr.821 higher. If the torque control gain is too high, set Pr.824 Torque control P gain 1 (current loop proportional gain) lower. Also, incorrect motor wiring can cause hunting, so check the wiring.
What to do if Mitsubishi Electric 800 Inverter speed does not accelerate?
If the speed isn't accelerating to the command speed, it might be due to a torque shortage or the torque limit is operating. Try raising the torque limit. Another potential cause is that only P (proportional) control is being performed. Since speed deviation occurs under P control when the load is heavy, select PI control.
How to reset a Mitsubishi Electric 800 Inverter?
To reset the Mitsubishi Electric Inverter, you can use the operation panel and press the STOP/RESET key. Alternatively, switch the power OFF and then ON again. Another method is to turn ON the Reset (RES) signal for at least 0.1 seconds.
Why Mitsubishi Electric 800 Inverter motor speed is not correct?
There could be several reasons why the motor speed is incorrect. It could be due to the speed command from the controller being different from the actual speed, possibly affected by noise. To resolve this, check the speed command sent from the controller and take EMC measures. You may also need to lower the setting of Pr.72 PWM frequency selection. Another reason could be a difference between the command speed and the speed recognized by the inverter; in this case, adjust bias and gain (Pr.125, Pr.126, C2 to C7) of the speed command again. Finally, the motor constant might vary due to an increase in the motor temperature. Try enabling the online auto tuning at startup (set Pr.95 (Pr.574) = "1") under Real sensorless vector control.
Why is the fault output signal retained in my Mitsubishi Electric Inverter and how to prevent it?
Opening the magnetic contactor (MC) provided on the input side of the Mitsubishi Electric Inverter at a fault occurrence shuts off the control power to the inverter. Therefore, the fault output will not be retained.
What causes rotation ripple during low-speed operation on a Mitsubishi Electric 800?
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 is the acceleration/deceleration time different from the setting on my Mitsubishi Electric 800?
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.
Why does the motor speed fluctuate with my Mitsubishi Electric 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.
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.
General| Series | 800 Series |
|---|---|
| Type | Inverter |
| Frequency Range | 0.1 to 400 Hz |
| Power Range | 0.4 kW to 560 kW (Varies by model) |
| Overload Capacity | 150% for 60 seconds, 200% for 3 seconds |
| Control Method | V/F Control |
| Communication | RS-485 |
| Protection Functions | Overcurrent, Overvoltage, Undervoltage, Ground fault, Short circuit |
| Storage Temperature | -20 to +65°C |
| Humidity | 95% RH or less (non-condensing) |
| Enclosure Rating | IP20 |
| Braking Unit | Built-in or External (depending on model) |
| Cooling Method | Fan cooling |
