To Next PageTo Next PageHow to stabilize machine movement with Mitsubishi Electric FR-E820-0008 Inverter?
Unstable machine movement when using a Mitsubishi Electric Inverter can stem from a couple of issues. First, the speed control gain might not be suitable for the machine; try adjusting Pr.820 and Pr.821. Second, the response might be slow due to the inverter's acceleration/deceleration time setting; setting the optimum acceleration/deceleration time may help.
What causes rotation ripple in Mitsubishi Electric Inverter at low speed?
Rotation ripple during low-speed operation with a Mitsubishi Electric Inverter can be caused by a high carrier frequency affecting the motor rotation. Try setting Pr.72 lower. Alternatively, the speed control gain might be too low; in this case, set Pr.820 higher.
Why does hunting (vibration or acoustic noise) occur in the motor or the machine of my Mitsubishi Electric Inverter?
Hunting in your Mitsubishi Electric Inverter's motor or machine can occur due to several reasons: * The speed control gain might be too high. Try setting Pr.820 lower and Pr.821 higher. * The torque control gain might be too high. Try setting Pr.824 Torque control P gain 1 (current loop proportional gain) lower. * The motor wiring might be incorrect. Verify the wiring.
What to do if motor speed fluctuates in Mitsubishi Electric FR-E820-0008 Inverter?
If the motor speed fluctuates with your Mitsubishi Electric Inverter, consider the following: * Check that the speed command sent from the controller is correct and take EMC measures. Also, try setting Pr.72 lower and Pr.822 Speed setting filter 1 higher. * Torque shortage can cause speed fluctuations. Raise the torque limit. * 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.
Why Mitsubishi Electric FR-E820-0008 Inverter motor does not run at the correct speed?
If your Mitsubishi Electric Inverter motor isn't running at the correct speed, it could be due to: * The speed command from the controller differing from the actual speed, possibly affected by noise. Ensure the speed command is correct and implement EMC measures. You can also lower the setting of Pr.72 PWM frequency selection. * An incorrect setting for the number of encoder pulses. Verify the Pr.369 setting (under Vector control). * A difference between the command speed and the speed recognized by the inverter. Readjust the bias and gain (Pr.125, Pr.126, C2 (Pr.902) to C7 (Pr.905)) of the speed command. * Motor constant variations due to increased motor temperature. Enable online auto-tuning at startup by setting Pr.95 (Pr.574) = "1" (under Real sensorless vector control).
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 |
