Has anyone successfully used an inverter to limit speed of a motor driving a hydraulic pump?
My plans are to crank up the pressure relief valve (currently set at 800 PSI) to about 1000 PSI and use a pressure transducer tied to a PID loop to control the motor to keep the pressure at 800 PSI.
The pump is driven by a 40 Hp inverter-duty 3-phase electric motor.
The hydraulic system is closed-center (only flow is over the top of the relief valve if nothing is calling for hydraulic power).
There are a couple very small motors driven all the time, but 90%+ of the loads are cylinders that run intermittently.
I have a surplus inverter already and there is a 4-20mA transducer feeding the a PLC, so the only expense will be re-routing the power supply wiring from the motor started to the inverter and an analog output cable from the PLC to the inverter.
Suggestions & advise are welcome!
My plans are to crank up the pressure relief valve (currently set at 800 PSI) to about 1000 PSI and use a pressure transducer tied to a PID loop to control the motor to keep the pressure at 800 PSI.
The pump is driven by a 40 Hp inverter-duty 3-phase electric motor.
The hydraulic system is closed-center (only flow is over the top of the relief valve if nothing is calling for hydraulic power).
There are a couple very small motors driven all the time, but 90%+ of the loads are cylinders that run intermittently.
I have a surplus inverter already and there is a 4-20mA transducer feeding the a PLC, so the only expense will be re-routing the power supply wiring from the motor started to the inverter and an analog output cable from the PLC to the inverter.
Suggestions & advise are welcome!