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For any high Torque applications like Jaw Crusher, V/F (being a scalar control) is never a right Torque control selection mode for inverters. Frequency inverter will obviously trip on over current faults whenever sudden dynamic response or Torque demanded is seen from the Load.
Also, if you operate a constant Torque application at low speed typically less than 30Hz in V/F control, inverter will trip on over current as it cannot provide the required Torque demanded by Load. V/F is best suited for variable Torque applications like Fan and pump.
The best selection in my understanding would be a modern Vector control inverter operated in vector mode. Many modern inverters have some best Torque Control features like FORCE (Field Oriented Control) that gives excellent Dynamic response, Torque control and are designed to run such application smoothly.
FORCE can provide control similar to that of a DC inverter by separating Flux and Torque producing components and controlling them individually to achieve best Torque and speed control results.
Also, if you operate a constant Torque application at low speed typically less than 30Hz in V/F control, inverter will trip on over current as it cannot provide the required Torque demanded by Load. V/F is best suited for variable Torque applications like Fan and pump.
The best selection in my understanding would be a modern Vector control inverter operated in vector mode. Many modern inverters have some best Torque Control features like FORCE (Field Oriented Control) that gives excellent Dynamic response, Torque control and are designed to run such application smoothly.
FORCE can provide control similar to that of a DC inverter by separating Flux and Torque producing components and controlling them individually to achieve best Torque and speed control results.
Tags: inverter, Vector control