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Appendix B Multi-pump Control of IMM
B.1 Parallel Pump Control
The parallel pump control is classied into multi-pump convergent ow and multi-pump distributed ow.
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The multi-pump convergent ow
A servo drive is used as the master drive, and the other drives are used as slave drives connected in parallel.
The host computer outputs a set of ow and pressure analog signals.
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In ow control state (the feedback pressure is less than the reference pressure), the master drive and the
slave drives rotate at the same speed.
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In pressure control state (the feedback pressure is greater than or equal to the reference pressure), the
slave drives are shut down, and the master drive independently controls the pumps.
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The multi-pump distributed ow
Multiple servo drives may work in multi-pump convergent flow mode or multi-pump distributed flow mode
(distributed PID control based on the oil pressure). The host computer outputs multiple sets of flow and
pressure analog signals
The following gure shows the multi-pump convergent ow structure chart.
Figure B-1 The multi-pump convergent ow structure chart
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