Engee documentation

Fixed-Displacement Motor (TL)

A constant displacement hydraulic motor in a thermal liquid network.

fixed displacement motor tl

Description

The Fixed-Displacement Motor (TL) unit is a device that receives energy from a thermal liquid network and transfers it to a mechanical rotary system. The working volume of the hydraulic motor is fixed at a constant value, which is set by means of the parameters Displacement.

Ports A and B represent the inlet ports of the hydraulic motor. Ports R and C represent the drive shaft and the hydraulic motor housing. The fluid flow can be from port A to port B (forward mode) or from port B to port A (reverse mode). The hydraulic motor mode is realised when the pressure drops in the direction of flow. The pump mode is realised when the pressure in the flow direction increases.

Operation Modes

fixed displacement motor il 1

The unit has four modes of operation. The mode of operation depends on the pressure drop from port A to port B and the angular velocity :

  • Mode 1, forward hydraulic motor mode: flow from port A to port B causes a pressure drop from port A to port B and a positive shaft angular velocity.

  • Mode 2, reverse pump mode: negative shaft angular velocity causes pressure increase from port B to port A and flow from port B to port A.

  • Mode 3, reverse hydraulic motor mode: flow from port B to port A causes pressure decrease from port B to port A and negative shaft angular velocity.

  • Mode 4, forward pump mode: positive shaft angular velocity causes an increase in pressure from port A to port B and flow from port A to port B.

The time constant of the hydraulic motor is considered negligible compared to the time constant of the system. The hydraulic motor is assumed to reach steady state almost instantaneously and is considered as a quasi-stationary component.

Conservation of energy

The mechanical work performed by the hydraulic motor is associated with the exchange of energy. The energy conservation equation is of the form:

where

  • and are energy flows in ports A and B respectively;

  • - hydraulic power of the hydraulic motor. It is a function of the pressure difference between the hydraulic motor ports: .

The mechanical power of the hydraulic motor is determined from the torque and angular velocity :

Flow rate and torque

The mass flow rate of the hydraulic motor is:

where

  • - is the actual mass flow rate;

  • - ideal mass flow rate;

  • - mass flow rate of internal leakage.

The torque of the hydraulic motor is:

where

  • - is the actual torque;

  • - ideal torque;

  • - friction torque.

The ideal flow rate and ideal torque are calculated as




where

  • - is the average value of liquid density in thermal liquid ports A and B;

  • - parameters value Displacement;

  • - angular speed of shaft rotation;

  • - pressure drop from inlet to outlet.

Analytical parameterization of leakage and friction torque

If the parameters Leakage and friction parameterization is set to `Analytical', the unit calculates leakage and friction torque based on nominal values of shaft speed, mechanical pressure drop and volumetric efficiency. The leakage rate, which depends on the pressure drop across the hydraulic motor, is calculated as:

where

  • ;

  • - is the average density of liquid in the ports;

  • - Hagen-Poiseuille coefficient for calculating analytical losses:

    where

    • - parameter value Displacement;

    • - parameter value Nominal shaft angular velocity;

    • - parameter value Volumetric efficiency at nominal conditions;

    • - parameter value Nominal pressure drop.

The friction torque, which depends on the angular velocity of the shaft, is calculated as:

where

  • - parameter value No-load torque;

  • - coefficient of dependence of friction torque on pressure at nominal working volume, which is determined by the value of parameters Mechanical efficiency at nominal conditions, :

    where is the friction torque under nominal conditions:

  • - pressure drop between ports A and B;

  • - shaft angular velocity, or .

Tabular data for parameterization

When usage of tabular data for efficiency or losses of the hydraulic motor, data for one or more operating modes can be provided. The signs of the tabular data define the operating mode of the unit. If data is provided for less than four operating modes, the unit calculates additional data for the other mode(s) by extending the given data into the remaining quadrants.

Table data - parameterization of volumetric and mechanical efficiency

If the parameters Leakage and friction parameterization is set to `Tabulated data - volumetric and mechanical efficiencies', the unit performs parameterization using tabulated data for volumetric and mechanical efficiencies.

The leakage flow rate is:

and the friction torque is:

where

  • - is the numerical smoothing parameter for the transition mode from the hydraulic motor to the pump;

  • - leakage flow rate in pump mode;

  • - leakage flow rate in the hydraulic motor mode;

  • - friction moment in the pump mode;

  • - friction torque in the hydraulic motor mode.

Smoothing parameters is given by hyperbolic function

where

  • - parameter value Pressure drop threshold for motor-pump transition;

  • - parameter value Angular velocity threshold for motor-pump transition.

The volumetric flow rate is calculated on the basis of the volumetric efficiency, which is set in tabular form in the area using the block parameters. Volumetric efficiency table, e_v(dp,w).

When operating in the hydraulic motor mode, the leakage flow rate is:

where is the volumetric efficiency obtained either by interpolation or extrapolation of tabular data.

Similarly, when operating in pump mode, the leakage flow rate is:

The friction torque is similarly calculated from the mechanical efficiency, a value that is tabulated in the area using the block parameter Mechanical efficiency table, e_m(dp,w).

When operating in the hydraulic motor mode, the friction torque is:

where is the mechanical efficiency obtained by interpolation or extrapolation of tabular data.

Similarly, when operating in pump mode, the friction torque is:

Table data - parameterization of volumetric and mechanical losses

If the parameters Leakage and friction parameterization is set to Tabulated data - volumetric and mechanical loss, the leakage volume flow rate is specified directly in tabular form in the area :

The leakage mass flow rate is calculated from the volumetric flow rate:

The friction torque is equal to:

where and are volume and mechanical losses obtained by interpolation or extrapolation of tabulated data given in parameters Volumetric loss table, q_loss(dp,w) и Mechanical loss table, torque_loss(dp,w).

Parameterization via input signal

If the parameters Leakage and friction parameterization is set to `Input signal - volumetric and mechanical efficiencies', the EV and EM ports are switched on. The internal leakage and shaft friction are calculated in the same way as with the parameterization `Tabulated data - volumetric and mechanical efficiencies', except that the efficiency values and are fed directly to the EV and EM ports respectively.

The efficiencies are positive values with a value between 0 and 1. The values of input signals outside these limits are set equal to the nearest limit (0 for inputs less than 0 and 1 for inputs greater than 1). Volumetric and mechanical efficiencies vary between a user-defined minimum and maximum value. Any values below or above this range will take the minimum and maximum setpoints respectively.

If the parameters Leakage and friction parameterization is set to `Input signal - volumetric and mechanical losses', the LV and LM ports are enabled. These ports receive the leakage flux and friction torque values as positive scalars.

Assumptions and limitations

  • The hydraulic motor is treated as a quasi-stationary component.

  • Fluid inertia effects and height differences are ignored.

  • The walls of the hydraulic motor are considered rigid.

  • External leakages are ignored.

Ports

Conserving

# R — mechanical port
`rotational mechanics

Details

Angular velocity of rotation and torque of a shaft.

Program usage name

rod_flange

# C — mechanical port
`rotational mechanics

Details

Angular velocity and torque of the body.

Program usage name

case_flange

# A — thermal liquid port
thermal liquid

Details

The fluid inlet or outlet port in a hydraulic motor.

Program usage name

port_a

# B — thermal liquid port
thermal liquid

Details

The fluid inlet or outlet port in a hydraulic motor.

Program usage name

port_b

Input

# EV — volumetric efficiency
scalar

Details

Volumetric efficiency specified as a scalar. The value must be in the range from 0 to 1.

Dependencies

To use this port, set the parameters Input signal - volumetric and mechanical efficiencies to Mechanical loss table, torque_loss(dp,w) to `Input signal - volumetric and mechanical efficiencies'.

Data types

Float64.
Complex numbers support

No

# EM — mechanical efficiency
scalar

Details

The mechanical efficiency of the hydraulic motor, given as a scalar. The value must be in the range from 0 to 1.

Dependencies

To use this port, set the parameters Input signal - volumetric and mechanical efficiencies to Mechanical loss table, torque_loss(dp,w) to `Input signal - volumetric and mechanical efficiencies'.

Data types

Float64.
Complex numbers support

No

# LV — leakage volume flow rate
scalar

Details

Hydraulic motor losses, in m3/s, given as a scalar.

Dependencies

To use this port, set the parameters Input signal - volumetric and mechanical losses to Input signal - volumetric and mechanical losses. Mechanical loss table, torque_loss(dp,w) to `Input signal - volumetric and mechanical losses'.

Data types

Float64.
Complex numbers support

No

# LM — friction moment
scalar

Details

Mechanical losses of the hydraulic motor, in N⋅m, given as a scalar.

Dependencies

To use this port, set the parameters Input signal - volumetric and mechanical losses to Input signal - volumetric and mechanical losses. Mechanical loss table, torque_loss(dp,w) to `Input signal - volumetric and mechanical losses'.

Data types

Float64.
Complex numbers support

No

Parameters

Parameters

# Leakage and friction parameterization — method for calculating leakage flow rate and friction torque
Analytical | Tabulated data - volumetric and mechanical efficiencies | Tabulated data - volumetric and mechanical losses | Input signal - volumetric and mechanical efficiencies | Input signal - volumetric and mechanical losses

Details

Parametrization of leakage and friction characteristics of a hydraulic motor.

  • Analytical' - leakage flow rate and friction torque are calculated using analytical equations.

  • Tabulated data - volumetric and mechanical efficiencies - volumetric and mechanical efficiencies are calculated from user defined parameters Pressure drop vector, dp и Shaft angular velocity vector, w and interpolated from the corresponding two-dimensional tables Volumetric efficiency table, e_v(dp,w) and Mechanical efficiency table, e_m(dp,w).

  • Tabulated data - volumetric and mechanical loss - leakage flow rate and friction torque are calculated from user defined parameters Pressure drop vector, dp и Shaft angular velocity vector, w and interpolated from the corresponding two-dimensional tables Volumetric loss table, q_loss(dp,w) и Mechanical loss table, torque_loss(dp,w).

  • Input signal - volumetric and mechanical efficiencies - volumetric and mechanical efficiencies are input as signals to the EV and EM ports respectively.

  • `Input signal - volumetric and mechanical loss' - leakage flow and friction torque are input as signals to ports LV and LM respectively.

Values

Analytical | Tabulated data - volumetric and mechanical efficiencies | Tabulated data - volumetric and mechanical losses | Input signal - volumetric and mechanical efficiencies | Input signal - volumetric and mechanical losses
Default value

Analytical
Program usage name

leakage_and_friction_parameterization
Evaluatable

No

# Displacement — working volume
l/rad | l/rev | gal/rad | gal/rev | igal/rad | m^3/deg | m^3/rad | m^3/rev | cm^3/rad | cm^3/rev | mm^3/rad | km^3/rad | ft^3/rad | in^3/deg | in^3/rad | in^3/rev | N*m/Pa/rad | N*m/bar/rad | lbf*ft/psi/rad

Details

The volume of fluid displaced when the shaft is rotated by a certain angle. The unit stores this value throughout the simulation.

Values

l/rad | l/rev | gal/rad | gal/rev | igal/rad | m^3/deg | m^3/rad | m^3/rev | cm^3/rad | cm^3/rev | mm^3/rad | km^3/rad | ft^3/rad | in^3/deg | in^3/rad | in^3/rev | N*m/Pa/rad | N*m/bar/rad | lbf*ft/psi/rad
Default value

30.0 cm^3/rev
Program usage name

displacement
Evaluatable

Yes

# Nominal shaft angular velocity — nominal angular speed of the shaft
rpm | deg/s | rad/s

Details

The angular speed of the rotating shaft corresponding to a given volumetric efficiency. This value under standard operating conditions is usually given in the manufacturer’s specification. The unit uses this parameters to calculate leakage flow and friction torque.

Dependencies

To use this parameter, set the parameters to Leakage and friction parameterization to `Analytical'.

Values

rpm | deg/s | rad/s
Default value

1800.0 rpm
Program usage name

w_nominal
Evaluatable

Yes

# Nominal pressure drop — nominal pressure drop between inlet and outlet
Pa | GPa | MPa | atm | bar | kPa | ksi | psi | uPa | kbar

Details

The pressure drop corresponding to the specified volumetric efficiency. This value under standard operating conditions can usually be found in the manufacturer’s specification. The unit uses this parameters to calculate the internal leakage flow rate.

Dependencies

To use this parameter, set the parameters Analytical to Leakage and friction parameterization to `Analytical'.

Values

Pa | GPa | MPa | atm | bar | kPa | ksi | psi | uPa | kbar
Default value

10.0 MPa
Program usage name

p_nominal
Evaluatable

Yes

# Nominal dynamic viscosity — nominal dynamic viscosity for a given volumetric efficiency
P | cP | reyn | s*uPa

Details

The nominal dynamic viscosity of the fluid corresponding to a given volumetric efficiency. This value under standard operating conditions can usually be found in the manufacturer’s specification. The unit uses this parameters to calculate the internal leakage flow rate.

Dependencies

To use this parameter, set the parameters Analytical to Leakage and friction parameterization to `Analytical'.

Values

P | cP | reyn | s*uPa
Default value

0.9 cP
Program usage name

mu_nominal
Evaluatable

Yes

# Volumetric efficiency at nominal conditions — volumetric efficiency at nominal conditions

Details

The ratio of the actual flow rate to the ideal flow rate under nominal conditions. This value under standard operating conditions can usually be found in the manufacturer’s specification. The unit uses this parameters to calculate the internal leakage flow rate.

Dependencies

To use this parameter, set the parameters Analytical to Leakage and friction parameterization to `Analytical'.

Default value

0.92
Program usage name

nominal_volumetric_efficiency
Evaluatable

Yes

# Mechanical efficiency at nominal conditions — mechanical efficiency at rated conditions

Details

The ratio of the actual torque to the ideal torque produced under nominal conditions.

Dependencies

To use this parameter, set the parameters Analytical to Leakage and friction parameterization to `Analytical'.

Default value

0.88
Program usage name

nominal_mechanical_efficiency
Evaluatable

Yes

# No-load torque — rest friction torque
N*m | mN*m | lbf*ft

Details

The minimum torque value to overcome seal friction. This torque is the load-independent component of the total friction torque.

Dependencies

To use this parameter, set the parameters `Analytical' to Leakage and friction parameterization to `Analytical'.

Values

N*m | mN*m | lbf*ft
Default value

0.0 N*m
Program usage name

no_load_torque
Evaluatable

Yes

# Pressure drop vector, dp — vector of pressure drop values for tabular parameterization
Pa | GPa | MPa | atm | bar | kPa | ksi | psi | uPa | kbar

Details

Vector of pressure drop values for tabular parameterization of leakage and torque friction. The elements of the vector must be listed in ascending order.

Dependencies

To use this parameter, set the parameters `Tabulated data - volumetric and mechanical eff. Leakage and friction parameterization to `Tabulated data - volumetric and mechanical efficiencies'.

Values

Pa | GPa | MPa | atm | bar | kPa | ksi | psi | uPa | kbar
Default value

[0.1, 1.0, 2.0] MPa
Program usage name

delta_p_vector_efficiency
Evaluatable

Yes

# Shaft angular velocity vector, w — vector of angular velocity values for tabular parameterization
rpm | deg/s | rad/s

Details

Vector of angular velocity data for tabular parameterization of leakage and friction torque. The elements of the vector must be listed in ascending order.

Dependencies

To use this parameter, set the parameters to Leakage and friction parameterization to `Tabulated data - volumetric and mechanical efficiencies'.

Values

rpm | deg/s | rad/s
Default value

[250.0, 500.0, 1000.0, 2000.0, 3000.0, 4000.0] rpm
Program usage name

w_vector_efficiency
Evaluatable

Yes

# Volumetric efficiency table, e_v(dp,w) — table of volumetric efficiency values

Details

Matrix at of volumetric efficiencies at a given fluid pressure drop and angular speed of shaft rotation. The block uses linear interpolation between the elements of the table.

The values and are the dimensions of the corresponding vectors:

  • - number of vector elements in parameters Pressure drop vector, dp.

  • - number of vector elements in the parameters Shaft angular velocity vector, w.

Dependencies

To use this parameter, set the parameters Tabulated data - volumetric and mechanical efficiencies to Leakage and friction parameterization to `Tabulated data - volumetric and mechanical efficiencies'.

Default value

[0.816 0.908 0.954 0.977 0.981 0.984; 0.325 0.663 0.831 0.916 0.925 0.946; 0.137 0.568 0.78 0.892 0.893 0.910]
Program usage name

volumetric_efficiency_matrix
Evaluatable

Yes

# Mechanical efficiency table, e_m(dp,w) — table of mechanical efficiency values

Details

Matrix at mechanical efficiencies at a given fluid pressure drop and angular speed of shaft rotation. The block uses linear interpolation between the elements of the table. The values and are the dimensions of the corresponding vectors:

  • - number of elements in the pressure drop vector Pressure drop vector, dp.

  • - number of elements in the vector of angular velocity Shaft angular velocity vector, w.

Dependencies

To use this parameter, set the parameters Tabulated data - volumetric and mechanical efficiencies to Leakage and friction parameterization to `Tabulated data - volumetric and mechanical efficiencies'.

Default value

[0.996 0.996 0.996 0.996 0.996 0.996; 0.988 0.989 0.989 0.989 0.989 0.990; 0.981 0.981 0.982 0.982 0.983 0.984]
Program usage name

mechanical_efficiency_matrix
Evaluatable

Yes

# Pressure drop vector, dp — vector of pressure drop values for tabular parameterization
Pa | GPa | MPa | atm | bar | kPa | ksi | psi | uPa | kbar

Details

Vector of pressure drop values for tabular parameterization of leakage and torque friction. The elements of the vector must be listed in ascending order.

Dependencies

To use this parameter, set the parameters Tabulated data - volumetric and mechanical losses to Leakage and friction parameterization to `Tabulated data - volumetric and mechanical losses'.

Values

Pa | GPa | MPa | atm | bar | kPa | ksi | psi | uPa | kbar
Default value

[0.1, 1.0, 2.0] MPa
Program usage name

delta_p_vector_loss
Evaluatable

Yes

# Shaft angular velocity vector, w — vector of angular velocity values for tabular parameterization
rpm | deg/s | rad/s

Details

Vector of angular velocity data for tabular parameterization of leakage and friction torque. The elements of the vector must be listed in ascending order.

Dependencies

To use this parameter, set the parameters Tabulated data - volumetric and mechanical losses to Leakage and friction parameterization to `Tabulated data - volumetric and mechanical losses'.

Values

rpm | deg/s | rad/s
Default value

[250.0, 500.0, 1000.0, 2000.0, 3000.0, 4000.0] rpm
Program usage name

w_vector_loss
Evaluatable

Yes

# Volumetric loss table, q_loss(dp,w) — table of volume loss values
m^3/s | m^3/h | cm^3/s | mm^3/s | ft^3/s | lpm | l/s | gpm | gal/s | gal/h

Details

Matrix at volume losses at a given fluid pressure drop and angular speed of shaft rotation. The block uses linear interpolation between the elements of the table.

The values and are the dimensions of the corresponding vectors:

  • - number of elements in the pressure drop vector Pressure drop vector, dp.

  • - number of elements in the vector of angular velocity Shaft angular velocity vector, w.

Dependencies

To use this parameter, set the parameters Tabulated data - volumetric and mechanical losses. Leakage and friction parameterization to `Tabulated data - volumetric and mechanical losses'.

Values

m^3/s | m^3/h | cm^3/s | mm^3/s | ft^3/s | lpm | l/s | gpm | gal/s | gal/h
Default value

1e-3 * [0.0230 0.0230 0.0230 0.0230 0.0285 0.0320; 0.0844 0.0842 0.0845 0.0840 0.1125 0.1080; 0.1079 0.1080 0.1100 0.1080 0.1605 0.1800] m^3/s
Program usage name

volumetric_loss_matrix
Evaluatable

Yes

# Mechanical loss table, torque_loss(dp,w) — table of mechanical loss values
N*m | mN*m | lbf*ft

Details

Matrix at of mechanical losses at a given fluid pressure drop and angular speed of shaft rotation.

The block uses linear interpolation between the elements of the table. The values and are the dimensions of the corresponding vectors:

  • - number of elements in the pressure drop vector Pressure drop vector, dp.

  • - number of elements in the vector of angular velocity Shaft angular velocity vector, w.

Dependencies

To use this parameter, set the parameters Tabulated data - volumetric and mechanical losses. Leakage and friction parameterization to `Tabulated data - volumetric and mechanical losses'.

Values

N*m | mN*m | lbf*ft
Default value

[0.0020 0.0020 0.0020 0.0020 0.0020 0.0020; 0.0607 0.0556 0.0556 0.0556 0.0556 0.0505; 0.1937 0.1937 0.1833 0.1833 0.1729 0.1626] N*m
Program usage name

mechanical_loss_matrix
Evaluatable

Yes

# Minimum volumetric efficiency — minimum volumetric efficiency

Details

The minimum value of the volumetric efficiency. If the input signal is below this value, the volumetric efficiency is set to the minimum volumetric efficiency value.

Dependencies

To use this parameter, set the parameters Input signal - volumetric and mechanical efficiencies. Leakage and friction parameterization to `Input signal - volumetric and mechanical efficiencies'.

Default value

1e-3
Program usage name

min_volumetric_efficiency
Evaluatable

Yes

# Maximum volumetric efficiency — maximum volumetric efficiency

Details

The maximum value of the volumetric efficiency. If the input signal exceeds this value, the volumetric efficiency is set to the maximum volumetric efficiency value.

Dependencies

To use this parameter, set the parameters Input signal - volumetric and mechanical efficiencies. Leakage and friction parameterization to `Input signal - volumetric and mechanical efficiencies'.

Default value

1.0
Program usage name

max_volumetric_efficiency
Evaluatable

Yes

# Minimum mechanical efficiency — minimum mechanical efficiency

Details

The minimum value of the mechanical efficiency. If the input signal is below this value, the mechanical efficiency is set to the minimum mechanical efficiency value.

Dependencies

To use this parameter, set the parameters Input signal - volumetric and mechanical efficiencies. Leakage and friction parameterization to `Input signal - volumetric and mechanical efficiencies'.

Default value

1e-3
Program usage name

min_mechanical_efficiency
Evaluatable

Yes

# Maximum mechanical efficiency — maximum mechanical efficiency

Details

The maximum value of the mechanical efficiency. If the input signal is higher than this value, the mechanical efficiency is set to the maximum mechanical efficiency value.

Dependencies

To use this parameter, set the parameters Input signal - volumetric and mechanical efficiencies. Leakage and friction parameterization to `Input signal - volumetric and mechanical efficiencies'.

Default value

1.0
Program usage name

max_mechanical_efficiency
Evaluatable

Yes

# Pressure drop threshold for motor-pump transition — threshold pressure for transient operation
Pa | GPa | MPa | atm | bar | kPa | ksi | psi | uPa | kbar

Details

The differential pressure threshold for the transition between pump and motor operation. The transition region is defined in the region of 0 MPa between the positive and negative values of the threshold differential pressure. Within this region, the calculated leakage rate and friction torque are corrected according to the transition term , to ensure a smooth transition from one mode to the other.

Dependencies

To use this parameter, set this parameter to Leakage and friction parameterization one of the values:

  • `Tabulated data - volumetric and mechanical efficiencies';

  • `Input signal - volumetric and mechanical efficiencies';

  • `Input signal - volumetric and mechanical losses'.

Values

Pa | GPa | MPa | atm | bar | kPa | ksi | psi | uPa | kbar
Default value

1e-3 MPa
Program usage name

p_threshold
Evaluatable

Yes

# Angular velocity threshold for motor-pump transition — threshold angular velocity for transient mode
rpm | deg/s | rad/s

Details

The angular velocity threshold for the transition between pump and hydraulic motor operation. The transition region is defined around 0 rpm between the positive and negative values of the angular velocity threshold. Within this region, the calculated leakage rate and friction torque are corrected according to the transition term , to ensure a smooth transition from one mode to the other.

Dependencies

To use this parameter, set the value for Leakage and friction parameterization one of the values:

  • `Tabulated data - volumetric and mechanical efficiencies';

  • `Input signal - volumetric and mechanical efficiencies';

  • `Input signal - volumetric and mechanical losses'.

Values

rpm | deg/s | rad/s
Default value

100.0 rpm
Program usage name

w_threshold
Evaluatable

Yes

# Cross-sectional area at ports A and B — cross-sectional area of ports A and B
m^2 | cm^2 | ft^2 | in^2 | km^2 | mi^2 | mm^2 | um^2 | yd^2

Details

Cross-sectional area of ports A and B. It is assumed that the areas are equal.

Values

m^2 | cm^2 | ft^2 | in^2 | km^2 | mi^2 | mm^2 | um^2 | yd^2
Default value

0.01 m^2
Program usage name

port_area
Evaluatable

Yes

# Check if operating beyond the range of supplied tabulated data — reporting of data overruns
None | Error

Details

Select Error to stop the simulation when the block uses values outside the provided data range.

Dependencies

To use this parameter, set the parameters to Leakage and friction parameterization one of the values:

  • `Tabulated data - volumetric and mechanical efficiencies';

  • `Tabulated data - volumetric and mechanical losses'.

Values

None | Error
Default value

None
Program usage name

supplied_range_assert_action
Evaluatable

No

# Check if operating beyond motor mode — message about unit operation outside the hydraulic motor mode
None | Error

Details

Select Error to stop the simulation when the unit is operating in the forward or reverse pump modes.

Dependencies

To use this parameter, set the parameters to Leakage and friction parameterization to `Input signal - volumetric and mechanical losses'.

Values

None | Error
Default value

None
Program usage name

operating_mode_assert_action
Evaluatable

No