I am designing a screw jack-type hoist that requires a 40 HP, 3-phase, 230 V motor. To prevent overloading the stems and buckling in the event of load jamming, I aim to limit the start and stall torque of the motor. I prefer not to use a mechanical torque limiter, making the reliability of the Variable Frequency Drive (VFD) crucial. Speed control and brake control are unnecessary for my application, eliminating the need for many advanced features that a VFD can offer. I am seeking the most economical VFD available in the North American market that can provide reliable control. I know Magnetek drives can do this but they are relatively expensive as they have many advanced features that I don't need.
Any help is appreciated.
Any help is appreciated.