magdyfayad
Member
i made a modifaction for my project to overcome a problem which is the motor - which controlled by AC drive - rotate automatically when we power up the AC drive even if we did not push start key
now i made a certain modifcation which when we power up the AC drive , the motor do not rotate until we push start key and after we push the start key the motor rotate normally
but i have problem due to my modifaction which is :
at the rest of the motor - do not move - there is a signal which activate a certain 24 VDC relay change very rapidly between 24 VDC and zero VDC as this relay be : on- off- on - off -on -off - ......etc
this problem appears only when the motor at the rest which no motion for this motor and the AC drive is power up !!
this relay may be damaged as this life time may be very short as the very high change between 24 VDC and zero VDC make the relay : on- off- on - off -on -off - ......etc !!
what is the prefect solution ??
is a solid state relay ??
or what ??
thanks
now i made a certain modifcation which when we power up the AC drive , the motor do not rotate until we push start key and after we push the start key the motor rotate normally
but i have problem due to my modifaction which is :
at the rest of the motor - do not move - there is a signal which activate a certain 24 VDC relay change very rapidly between 24 VDC and zero VDC as this relay be : on- off- on - off -on -off - ......etc
this problem appears only when the motor at the rest which no motion for this motor and the AC drive is power up !!
this relay may be damaged as this life time may be very short as the very high change between 24 VDC and zero VDC make the relay : on- off- on - off -on -off - ......etc !!
what is the prefect solution ??
is a solid state relay ??
or what ??
thanks
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