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Dear Sirs,
I have an application of dynamometer where a diesel engine is being under test. so to provide a simulation for variable loading on the diesel engine, an induction motor (controlled by vfd) is being mechanically coupled to the induction motor. The diesel engine will rotate the induction motor. so the induction motor will be in the (regeneration) mode where it's going to convert the mechanical energy of the diesel engine into electricity that will be dissipated in a braking resistor that is connected to the inverter driving the motor.
As the experiment requires variable loading of the diesel engine, we are going to control the torque of the induction motor during the regeneration or the dynamic braking mode to vary the loading torque on the diesel engine.
My questions are:
1- is it possible to control the braking torque with the speed being fixed at a constant value? does this mean I'm going to perform both speed and torque control in parallel?
2-when the diesel engine drives the induction motor at a speed which is less than the synchronous speed, will the induction motor converts to the dynamic braking mode? or for this mode to be activated the diesel engine must drive the motor at speeds greater than the synchronous speed?
I have an application of dynamometer where a diesel engine is being under test. so to provide a simulation for variable loading on the diesel engine, an induction motor (controlled by vfd) is being mechanically coupled to the induction motor. The diesel engine will rotate the induction motor. so the induction motor will be in the (regeneration) mode where it's going to convert the mechanical energy of the diesel engine into electricity that will be dissipated in a braking resistor that is connected to the inverter driving the motor.
As the experiment requires variable loading of the diesel engine, we are going to control the torque of the induction motor during the regeneration or the dynamic braking mode to vary the loading torque on the diesel engine.
My questions are:
1- is it possible to control the braking torque with the speed being fixed at a constant value? does this mean I'm going to perform both speed and torque control in parallel?
2-when the diesel engine drives the induction motor at a speed which is less than the synchronous speed, will the induction motor converts to the dynamic braking mode? or for this mode to be activated the diesel engine must drive the motor at speeds greater than the synchronous speed?