Notices regarding the use of inverter drives
- Motor capacity at high speed
Usually, you can't increase motor speed beyond its rated speed.
Ex. Change of speed to 110% will result in a load torque 110% x 110% = 121%.
This load torque will overload the motor or inverter. In this case, you have to increase the motor and inverter capacity.
- Motor rating
The capacity range of the "dryers" is small. Sometimes, there is a 100V motor rating. In this case, please change the motor from 100V rating to 3 phase, 200V rating.
(The inverter is designed for 3 phase 200V or 400V motor.)
- 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.)