I have always heard that for loads that require a high starting torque a VFD should be set to a sensorless vector mode as opposed to V/Hz mode. What specifically about the sensorless vector mode makes the drive capable of producing a higher starting torque then V/Hz mode? What is the limiting factor with the V/Hz mode that may not allow a high torque load to be started.
We have a load application that requires up to 250% starting torque to start the load. Drive and motor are both rated and have been tested for this starting requirement. Currently this drive is in a V/Hz mode and sometimes has trouble starting this load. We are working on setting the drive up in a vector contorl mode (FOC with encoder) to help with this issue?
What are the limiting factors of V/Hz and the advantages of vector control for this starting application?
We have a load application that requires up to 250% starting torque to start the load. Drive and motor are both rated and have been tested for this starting requirement. Currently this drive is in a V/Hz mode and sometimes has trouble starting this load. We are working on setting the drive up in a vector contorl mode (FOC with encoder) to help with this issue?
What are the limiting factors of V/Hz and the advantages of vector control for this starting application?