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WOLFRAM SYSTEM MODELER

Motor

Model of a motor with fixed displacement and volumes

Diagram

Wolfram Language

In[1]:=

SystemModel["Hydraulic.PumpsAndMotors.Motor"]

Out[1]:=

Information

This is a model of a motor with volumes, fixed displacement setting, friction, and internal and external leakage. The axial speed is proportional to the flow rate:

The torque is proportional to the pressure difference:

where

	:	Mass flow rate
	:	Fluid density
D	:	Displacement
	:	Pressure difference between the ports
	:	Torque
	:	Angular velocity

Limitations

Volumetric efficiency is not included in the model.

Reference

Industrial Hydraulics Manual, 5th ed., Maumee, OH: Eaton Hydraulics Training Services, 2008 p. 164.

Parameters (8)

medium	Value: Oil() Type: Medium Description: Medium in the component
D	Value: Type: Volume (m³) Description: Displacement per revolution
externalLeakage	Value: 1e-12 Type: PressureDependentLeakage (m³/(s⋅Pa)) Description: Leakage between cylinders
internalLeakage	Value: 1e-12 Type: PressureDependentLeakage (m³/(s⋅Pa)) Description: Leakage between cylinders
frictionD	Value: 1 Type: RotationalDampingConstant (N⋅m⋅s/rad) Description: Viscous friction
J	Value: 1 Type: MomentOfInertia (kg⋅m²) Description: Moments of inertia
tankPressure	Value: 100000.0 Type: Pressure (Pa) Description: Tank pressure
V	Value: 0.0001 Type: Volume (m³) Description: Volume

Connectors (3)

	port_b	Type: Port_b Description: Port for hydraulic fluid (unfilled icon)
	port_a	Type: Port_a Description: Port for hydraulic fluid (filled icon)
	flange	Type: Flange_a Description: One-dimensional rotational flange of a shaft (filled circle icon)

port_b

Type: Port_b

Description: Port for hydraulic fluid (unfilled icon)

port_a

Type: Port_a

Description: Port for hydraulic fluid (filled icon)

flange

Type: Flange_a

Description: One-dimensional rotational flange of a shaft (filled circle icon)

Components (13)

	medium	Type: Medium Description: Medium in the component
	volume_b	Type: Volume Description: Fixed volume with fluid storage
	volume_a	Type: Volume Description: Fixed volume with fluid storage
	inertia	Type: Inertia Description: 1D-rotational component with inertia
	friction	Type: Damper Description: Linear 1D rotational damper
	pumpMotorVariable	Type: BasicDisplacementMachine Description: Model of a pump/motor with variable displacement and no volumes
	externalLeakage_b	Type: RestrictionLaminar Description: Laminar restriction using conductance
	tank_b	Type: Tank Description: Simple tank with constant pressure
	tank_a	Type: Tank Description: Simple tank with constant pressure
	externalLeakage_a	Type: RestrictionLaminar Description: Laminar restriction using conductance
	internalLeakage_ab	Type: RestrictionLaminar Description: Laminar restriction using conductance
	fixed1	Type: Fixed Description: Flange fixed in housing at a given angle
	const	Type: Constant Description: Generate constant signal of type Real