If There Is Noise When The Inverter Is Started Or From An Am Radio; If The Ground Fault Interrupter Operates When The Inverter Is Run; If There Is Mechanical Oscillation - Omron SYSDRIVE RV Series User Manual

The ambient temperature is too high.
The motor rating is determined within a particular ambient operating temperature range. The motor will burn
out if it is run continuously at the rated torque in an environment in which the maximum ambient operating
temperature is exceeded. Lower the motor's ambient temperature to within the acceptable ambient operating
temperature range.
The withstand voltage between the motor phases is insufficient.
When the motor is connected to the Inverter output, a surge is generated between the Inverter switching and
the motor coil. Normally the maximum surge voltage is three times the Inverter's input power supply voltage
(i.e., 1,200 V for 400 V Class). Be sure to use a motor with a withstand voltage between the motor phases that
is greater than the maximum surge voltage. In particular, when using a 400 V Class Inverter, use a special
motor for Inverters.
Autotuning has not been performed for vector control
Vector control will not perform if autotuning has not been performed. Perform autotuning, or set the motor
parameters through calculations. Alternatively, change the Control Method Selection (A1-02) to V/f control (0
or 1).

If There is Noise When the Inverter is Started or From an AM Radio

If noise is generated by Inverter switching, implement the following countermeasures:
Change the Inverter's Carrier Frequency Selection (C6-02) to lower the carrier frequency. This will help to
•
some extent by reducing the amount of internal switching.
Install an Input Noise Filter at the Inverter's power supply input area.
•
Install an Output Noise Filter at the Inverter's power supply output area.
•
Use metal tubing. Electric waves can be shielded by metal, so encase the Inverter with metal (steel).
•
Ground the Inverter and motor.
•
Separate main circuit wiring from control wiring.
•

If the Ground Fault Interrupter Operates When the Inverter is Run

The Inverter performs internal switching, so there is a certain amount of leakage current. This may cause the
ground fault interrupter to operate and cut off the power supply. Change to a ground fault interrupter with a
high leakage detection level (i.e., a sensitivity current of 200 mA or greater per Unit, with an operating time of
0.1 s or more), or one that incorporates high frequency countermeasures (i.e., one designed for use with Invert-
ers). It will also help to some extent to change the Inverter's Carrier Frequency Selection (C6-02) to lower the
carrier frequency. In addition, remember that the leakage current increases as the cable is lengthened.

If There is Mechanical Oscillation

Use the following information when there is mechanical oscillation.
The machinery is making unusual sounds.
The following causes are possible.
Troubleshooting
25
7-