Notices regarding the use of inverter drives
- Stalling caused by short acceleration time
Usually, the setting of a short acceleration time causes an OC1 trip(overcurrent while accelerating) or an OL1 trip(overload in inverters).
However, in case of a short time acceleration in high speed motors, it is likely that the motors might stall
Therefore, please set a long acceleration time to use a high speed motor.
When the acceleration torque is larger than the breakdown torque, motor slips are increasing beyond their slip rating, and motors can not continue to rotate.
- Short circuit detection at start-up
Impedance of high speed motors is smaller than that of standard motors.
Therefore, the protective function of output short circuit detection at start-up sometimes malfunctions.
In this case, please set F613(short circuit detection at start-up).
- Electromagnetic noise
The inverter is generating "electromagnetic noise".
If there are some high accuracy sensors or other sensitive equipment near the inverter drive, the inverter's noise may cause some trouble or a malfunction.
Electromagnetic noise can be avoided by installing an external noise filter or using a different wiring method.
The inverter is generating "harmonics".
These harmonics sometimes cause a malfunction in other control equipment that is connected to the same power source.
Harmonics can be avoided by installing an external "reactor".
To decrease "harmonics", we recommend to install DC reactors in all our inverter models.
(NOTE: 100V input models require AC reactors.)