SIMPLORER User Manual V6.0 - FER-a

10.4 Thermal Components
• Temperature Source (T)
• Heat Flow Source (H)
• Thermal Resistance (RTH)
• Thermal Capacitance (CTH)
Across and Through Quantity of the Thermal Domain
Across Through Equation
Temperature [K] Heat Flow [J/s]
Tt () = K ⋅ H() t
SIMPLORER 6.0 — Manual 333
The thermal domain components appear in the Thermal folder of Physical Domains in the «Basics»
tab. The folder provides thermal basic components to model simple thermal equivalent
circuits, for example cooling systems or heat sinks. The thermal domain uses the temperature
as across and the heat flow as through quantity.
By default, components and wires of the thermal domain are represented in red in the graphical
representation of the Schematic. Select SHEET>PROPERTIES to change the wire color of the
domain. You can only change the wire color. The symbol color is not affected by the setting.
Temperature Source
>>Basics>Physical Domains>Thermal
The component represents an ideal temperature source which supplies the defined temperature
for an arbitrary heat flow. Within the dialog you can choose a constant or the time-controlled
type.
Dialog Settings
� «Temperature [K]»
The linear temperature source is selected. Common parameter type. Enter a numerical value,
a variable, or an expression in the text box or use the pin to connect a quantity.
� � «Use pin»
If the box is checked, the value is defined by the quantity connected to the pin, otherwise the
value in the text box is used.
� «Time Controlled»
The time-controlled temperature source is selected. In the list, select a time function and define
the corresponding parameters. See also “Using Time Functions” on page 275.
� In the list, select the sine, pulse, triangular, trapezoidal, saw-tooth rising, or saw-tooth falling
time function.
Linear Temperature Source
Tt () =
VALUE
The temperature is equivalent to the present value of the quantity specified in the text box.
Usually a constant value, a time function, or a variable are chosen, or the value is determined
in a state graph. All system quantities and variables can be combined with mathematical and
logical operators and constants.