model LinearSpeedDependentTorque "Linear dependency of torque versus speed"
extends Modelica.Mechanics.Rotational.Interfaces.PartialTorque;
parameter Modelica.SIunits.Torque tau_nominal "Nominal torque (if negative, torque is acting as load in positive direction of rotation)";
parameter Boolean TorqueDirection = true "Same direction of torque in both directions of rotation";
parameter Modelica.SIunits.AngularVelocity w_nominal(min = Modelica.Constants.eps) "Nominal speed";
Modelica.SIunits.AngularVelocity w "Angular velocity of flange with respect to support (= der(phi))";
Modelica.SIunits.Torque tau "Accelerating torque acting at flange (= -flange.tau)";
equation
if TorqueDirection then
tau = tau_nominal * abs(w / w_nominal);
else
tau = tau_nominal * (w / w_nominal);
end if;
w = der(phi);
tau = -flange.tau;
annotation (
Icon(
coordinateSystem(
preserveAspectRatio = true,
extent = {
{-100, -100},
{100, 100}}),
graphics = {
Line(
points = {
{0, 60},
{0, -50}},
color = {192, 192, 192}),
Line(
points = {
{-75, 0},
{75, 0}},
color = {192, 192, 192}),
Line(
points = {
{-60, -45},
{60, 45}},
color = {0, 0, 127})}),
Documentation(info = "<html>\n<p>\nModel of torque, linearly dependent on angular velocity of flange.<br>\nParameter TorqueDirection chooses whether direction of torque is the same in both directions of rotation or not.\n</p>\n</html>"));
end LinearSpeedDependentTorque;