Why not write to OEM service dept and ask them how much current and duration can be expected after 10yrs with rusty bearings to be overcome by a SMPS? In the meantime plan a test by running in a tank of water and design in a safety factor for sludge restricting the pipes or excessive long pipes of inertial water to move from existing installations.
Do the math or make it resilient. A slow start from 6V may work but with how much margin for failure? Perhaps a controlled CC start is better for you if you are sure that voltage is rising, meaning that water is flowing. But then fuses may blow. Do the math.
Or do the virtual poop test.
Either way it appears the motors runs around a planetary gear cycle of 1 Hz with a 2 Hz current peak duration depending on load length and pressure. So the current limit in the core of the supply must be much be several times greater than the average max current or fuse rating.
Do the math or make it resilient. A slow start from 6V may work but with how much margin for failure? Perhaps a controlled CC start is better for you if you are sure that voltage is rising, meaning that water is flowing. But then fuses may blow. Do the math.
Or do the virtual poop test.
Either way it appears the motors runs around a planetary gear cycle of 1 Hz with a 2 Hz current peak duration depending on load length and pressure. So the current limit in the core of the supply must be much be several times greater than the average max current or fuse rating.
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