We are working for an energy saving project in our Corrugator plant where we have one Corrugator machine and four Flexo Graphic printing machines. We have Trim Waste Blowers at Corrugator and Flexo machines which throw the trim from machines to a trim collector cyclone away from machines. Each blower has 18KW-400V motor with star delta control. As the motor is coupled with impeller via v-belt and pulley, so the starting time of blower is almost 12sec. One of our colleague was thinking to control the Flexo machines blower in this way to start it for 5 minutes and then stop it for 5minutes i.e. 5 minutes flip flop as operationally it can be possible but technically I did not agree with him because for me, for such kind of motors, the number of start stop per hour is limited because of high inertia load. For such frequent start/stop, only soft starter or VFD can be ok.
Any comment on it please?