Siemens inverter problem
Tags: inverter, Troubleshooting
At one of my work site there is a inverter which is running a motor coupled to conveyor belt
Power dips of duration 1s is somewhat frequent at site
due to this power fluctuation the frequency inverter earlier tripped, after enabling the auto restart and flying restart option in the parameter, now the inverter is not tripping but during the power dip the motor slows down and once the dip gone ramps up back. since the motor is loaded the dc link capacitor is discharging quickly
I want to avoid this speed variation occurring
so one solution which I sort out is to add additional dc link capacitor to existing so as to hold as much energy to withstand the power dip occurring
I don't know how practical it would be. And if this possible what all are the design/selection criteria, also I would like to know other alternative solution.
The inverter is Micromaster mm430 [siemens make]
Power dips of duration 1s is somewhat frequent at site
due to this power fluctuation the frequency inverter earlier tripped, after enabling the auto restart and flying restart option in the parameter, now the inverter is not tripping but during the power dip the motor slows down and once the dip gone ramps up back. since the motor is loaded the dc link capacitor is discharging quickly
I want to avoid this speed variation occurring
so one solution which I sort out is to add additional dc link capacitor to existing so as to hold as much energy to withstand the power dip occurring
I don't know how practical it would be. And if this possible what all are the design/selection criteria, also I would like to know other alternative solution.
The inverter is Micromaster mm430 [siemens make]
<- - I have an Opinion - ->
The additional capacitor has many disadvantages as it increases the peak current through the diode. Also, you need large number of capacitor bank for such a long time.
We provide customized solution using battery back-up system. In the event of the power failure, the system automatically transfers to the battery and maintains the dc link. Later on the battery is charged through the battery charger. - -> by: inverters.cn