Id Con Mot $—$ Ideal constant displacement motor

This component describes an ideal motor with constant displacement.

Implementation

The torque, tau, is given by:

tau = Dmotor $\cdot$ factor $\cdot$ (port_A.p - port_B.p) / (2 $\cdot$ $\mathrm{\pi }$)

The flow rate is given by:

q = Dmotor $\cdot$ w $\cdot$ factor / (2 $\cdot$ $\mathrm{\pi }$)

If the inlet pressure is lower than the atmospheric pressure, the delivered flow rate becomes smaller (that is, the value of factor decreases). Flow (q) from port_A to port_B is considered positive.

Variables used in the above equations

 tau Torque [$\mathrm{Nm}$]. q Flow rate at the outlet port $\left[\frac{{m}^{3}}{s}\right]$. Dmotor Displacement per revolution [${m}^{3}$]. w Angular velocity $\left[\frac{\mathrm{rad}}{s}\right]$. factor Pressure-dependent variable. Equals 1 at normal running conditions and 0 at vapor pressure.

Connections

 Name Description Modelica ID ${\mathrm{port}}_{A}$ Port A, where oil flows into the component ($0, ${p}_{B}<{p}_{A}$ means $0<\mathrm{Δp}$) port_A ${\mathrm{port}}_{B}$ Port B, where oil leaves the component ($q<0$, ${p}_{B}<{p}_{A}$ means $0<\mathrm{Δp}$) port_B ${\mathrm{flange}}_{a}$ flange_a ${\mathrm{flange}}_{b}$ flange_b $\mathrm{oil}$ oil

Parameters

 Name Default Units Description Modelica ID ${\mathrm{ΔT}}_{\mathrm{system}}$ $0$ $K$ Temperature offset from system temperature dT_system ${\mathrm{D}}_{\mathrm{motor}}$ ${10}^{-4}$ ${m}^{3}$ Displacement per revolution Dmotor