# David John

### MathWorks

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**Content Feed**

Diode Power losses in Simscape Electrical

Reverse recovery loss can now be tabulated for a diode using the Simscape Electrical diode block: Piecewise or exponential diode...

2 maanden ago | 1

| accepted

Spice Netlist to Simscape Conversion Issue - LIB directive

The .subckt definition is not quite right for XU1 and XU2. There are some dashes missing from the subcircuit names in order to l...

3 maanden ago | 1

Calling time step and values of Previous time step in a component file of simscape

(1) I'm not 100% sure what you mean with this question, but fuelcell.ssc defines the Simscape model for one block of the overall...

3 maanden ago | 1

| accepted

Simscape - Transient initialization vs Transient Solve

The transient solve also solves for the algebraic variables. At an event, we re-initialize in order to handle possible jumps in ...

3 maanden ago | 0

| accepted

How to show component values in Simscape model

The solution provided by Dean is the most robust one. If you're unsure what the parameter name is, you can hover it with your mo...

3 maanden ago | 0

| accepted

Spice Netlist to Simscape Conversion Issue - LIB directive

On lines 25 and 111 of the lib file, you have stray newlines in the middle of a continued line. Please try removing those two bl...

3 maanden ago | 1

| accepted

Error compiling Simscape network for model

The units of "Table grid vector" in "PS Lookup Table (1D)" should be 'm' instead of '1'.

3 maanden ago | 0

| accepted

Is it possible to create a simscape block with three nodes?

branches q1 : a.q -> b.q; q2 : a.q -> c.q end

3 maanden ago | 0

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Not connected in SimScape

In older releases, there are blocks that allow you to do this. For example, in the electrical domain, there is the "Open Circuit...

3 maanden ago | 0

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Capturing efficiency of a system while sweeping voltages and duty cycle parameters

There is an example that is doing parametric sweeps like you describe: https://www.mathworks.com/help/physmod/sps/ug/converter-d...

7 maanden ago | 0

| accepted

Simulink Model for ohmic heating in a resistor

Have a look at the Variable Resistor and Thermal Resistor blocks. The source code should be available for both of these blocks. ...

7 maanden ago | 1

| accepted

Nonlinear Capacitor (Debye Relaxation Model)

If your "Series resistance" is zero, then DF1 and DF2 are just the same as your values for "Dissipation factors (%) at f1 and f2...

9 maanden ago | 0

| accepted

Change transformer parameters form Guide app

The parameter value should be a string or character vector instead of a double or array of doubles.

9 maanden ago | 0

Voltage measurement for simscape model

If I understand correctly, you want to know the voltage at port 2 on each of these subsystems wth respect to ground. You can use...

9 maanden ago | 1

How do I identify the exact string to use to programmatically configure a Simscape component's parameters when instantiating it?

If you let your mouse hover over a parameter in the block mask, the programmatic name should appear.

9 maanden ago | 0

| accepted

Disable blocks through code

use set_param to set the "Commented" parameter to "on". For example, if you have a model called "model" with a block that you w...

10 maanden ago | 0

Add Reset Function to Simscape Integrator Block

In 2018 it was true that Simscape did not let you reset integrators. In a more recent release, however, you can do it using the ...

10 maanden ago | 0

Difference between Blue Simscape and Black Simscape Mosfet

The blue one is in the Simscape language and is compatible with all Simscape components. The black one is for "Specialized Power...

10 maanden ago | 0

| accepted

Does the location of Solver Configuration matters?

The location doesn't matter. It just needs to be connected to something from the physical Simscape network.

10 maanden ago | 0

defining the constant mentioned in the parameter's value

This parameter gets loaded into the MATLAB workspace when you open the example model. If you go to MATLAB and look at the variab...

10 maanden ago | 0

Question about the term "Vf*Ron*Goff" in the series voltage in diode block from Simscape Electrical.

In the off-state, the diode equation is: v = i/Goff In the on-state, the equation is: v = i*Ron + Vsource where Vsource is l...

ongeveer een jaar ago | 0

| accepted

MOSFET SPICE models .lib file into Simulink using subcircuit2ssc

Most likely this is because you have nested subcircuits. In particular, there is: .ENDS TO263_7_11_HVM_1G75_1S500_100MHz_parlel...

ongeveer een jaar ago | 0

| accepted

Why the Grading coefficient 'M' of the spice diode must less than 0.9?

The grading coefficient affects the diffusion capacitance. The equations are shown at SPICE-compatible diode - MATLAB (mathworks...

ongeveer een jaar ago | 0

| accepted

Hard Switching Mosfet Simulation

Use the N-Channel MOSFET block from Simscape Electrical and ensure include a non-zero Coss in the Capacitance group of parameter...

ongeveer een jaar ago | 0

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How to extract elements from a Simscape electrical simulation and run a batched parameter sweep?

Yes, this is possible. There is an example that illustrates a few of the steps you've highlighted above at Tolerance Study Using...

ongeveer een jaar ago | 0

| accepted

Simscape Electrical conversion to Simulink and back

BRK is an electrical signal, so it needs to come out of a voltage source instead of directly from a Simulink-PS Converter. Try ...

ongeveer een jaar ago | 1

| accepted

Connecting Fuse in Simscape Transformer Circuit

It sounds like you are trying to combine library blocks from "Specialized Power Systems" with Simscape-language-based blocks. P...

ongeveer een jaar ago | 0

| accepted

How to customise a simscape model by unmasking ?

Please check if the PMSM has an internal variable called power_dissipated in it in your version of MATLAB / Simulink. This can ...

ongeveer een jaar ago | 0

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Simulink simulation fails or not at a specific time depending on duration

It would be helpful to see your example model, but when this occurs it is most likely that the "Max step size" is having an impa...

ongeveer een jaar ago | 0

| accepted

How do I view the circuit within block?

If you're using a library block, it is written as an ssc file, which means that there is no graphical representation of the bloc...

ongeveer een jaar ago | 0

| accepted