Hello everyone,
I am working on a hydraulic circuit that is driven by a motor operated by a Frequency Drive(VFD). (to simpify the model and avoid sharing confidential data, I used Test sequence with a negative torque output to simulate the VFD output) The motor control of the VFD creates some oscillations reaching negative torque values in the generated motor torque resulting in errors of the fixed displacement pump and pipe, eventually stopping the simulation.
Error:An error occurred during simulation and the simulation was terminated
Caused by:
[‘HydraulicCircuit/Solver Configuration’]: At time 3.500000, one or more assertions are triggered. See causes for specific information.
Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:
Block path: HydraulicCircuit/Fixed-Displacement Pump (TL)
Assert location:
o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:
Block path: HydraulicCircuit/Pipe (TL)
Assert location:
o (location information is protected)
o (location information is protected)

I am looking for a way to make the hydraulic circuit resistant to these sudden pressure drops as they will certainly occur due to PID regulator settings of the VFD.Hello everyone,
I am working on a hydraulic circuit that is driven by a motor operated by a Frequency Drive(VFD). (to simpify the model and avoid sharing confidential data, I used Test sequence with a negative torque output to simulate the VFD output) The motor control of the VFD creates some oscillations reaching negative torque values in the generated motor torque resulting in errors of the fixed displacement pump and pipe, eventually stopping the simulation.
Error:An error occurred during simulation and the simulation was terminated
Caused by:
[‘HydraulicCircuit/Solver Configuration’]: At time 3.500000, one or more assertions are triggered. See causes for specific information.
Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:
Block path: HydraulicCircuit/Fixed-Displacement Pump (TL)
Assert location:
o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:
Block path: HydraulicCircuit/Pipe (TL)
Assert location:
o (location information is protected)
o (location information is protected)

I am looking for a way to make the hydraulic circuit resistant to these sudden pressure drops as they will certainly occur due to PID regulator settings of the VFD. Hello everyone,
I am working on a hydraulic circuit that is driven by a motor operated by a Frequency Drive(VFD). (to simpify the model and avoid sharing confidential data, I used Test sequence with a negative torque output to simulate the VFD output) The motor control of the VFD creates some oscillations reaching negative torque values in the generated motor torque resulting in errors of the fixed displacement pump and pipe, eventually stopping the simulation.
Error:An error occurred during simulation and the simulation was terminated
Caused by:
[‘HydraulicCircuit/Solver Configuration’]: At time 3.500000, one or more assertions are triggered. See causes for specific information.
Pressure at port B must be greater than or equal to Minimum valid pressure. The assertion comes from:
Block path: HydraulicCircuit/Fixed-Displacement Pump (TL)
Assert location:
o (location information is protected)

Pressure at port A must be greater than or equal to Minimum valid pressure. The assertion comes from:
Block path: HydraulicCircuit/Pipe (TL)
Assert location:
o (location information is protected)
o (location information is protected)

I am looking for a way to make the hydraulic circuit resistant to these sudden pressure drops as they will certainly occur due to PID regulator settings of the VFD. hydraulic_system, thermal_liquid MATLAB Answers — New Questions

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