Steady-state modelling and performance of a rotary direct drive digital valve

A rotary direct drive digital valve driven by a stepper motor was proposed. By analysing its working principle, the steady-state mathematical model reflecting the relationship between the pressure, the flow and the angular displacement was deduced. Based on this mathematical model, the models of the...

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Veröffentlicht in:Measurement and control (London) 2020-03, Vol.53 (3-4), p.311-319
1. Verfasser: Li, Yuesong
Format: Artikel
Sprache:eng
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Zusammenfassung:A rotary direct drive digital valve driven by a stepper motor was proposed. By analysing its working principle, the steady-state mathematical model reflecting the relationship between the pressure, the flow and the angular displacement was deduced. Based on this mathematical model, the models of the null valve coefficients, the zero leakage flow and the steady-state flow torque were given. The simulation shows that the relationship between the pressure and the flow of the rotary valve is nonlinear; however, under a constant load pressure, the flow characteristics and the steady-state flow torque characteristics of the rotary valve with rectangular throttle orifices are linear. The experimental results show that the flow is directly proportional to the steps of the stepper motor, and the proposed mathematical models are valid.
ISSN:0020-2940
2051-8730
DOI:10.1177/0020294019866852