PSIM software learning ---08 call of C program block

   stay PSIM Circuit simulation , If a function cannot be built using the circuit component model in the component library , have access to C Program element , To write C Program code implementation . among C Language modules include simplification C Modules and common C modular .C The application method of program module is as follows .

simplify C modular

   Call simplification C The steps of the module are . Open the menu bar Elements — Other — Function Blocks — Simplified C block.

   Now open a C modular , take C The module is placed in the circuit diagram .
   Double click this C The module opens it .

   At this point, you can write in this blank area C Code. , Writing C Before code , First, briefly introduce the meaning of each attribute in this interface .

Name ： Used to set C Module name .
Input： Used to set the number of input pins , Input pin is used for x Named after the , such as x1、x2、x3 … xn.
Output: Used to set the number of output pins , For output pins y Named after the , such as y1、y2、y3 … yn.
Writing C Code time , There are also two default variables that can be used t and delt,t Refers to the total time the system is running ,delt It refers to the time step , That is, how often the system calls C Module once . For example, the running time of the system is 1s, The time step is 0.0001s, that 1s The clock system will call c modular 1000 Time . This t and delt The value of is oneself in Simulation Control Set in the .

   Next write C Code .

   Here, the input port and output port are respectively set to one , C The code is also very simple , Set the output signal to twice the input signal . Next, build a simple test circuit .

   Enter an amplitude of 10 v , The frequency is 1000 The sine wave signal of , Then measure the output signal . The output waveform is as follows ：

   It can also be seen from the waveform that the output waveform is the input waveform 2 times .

   For time C Modules look more intuitive , You can edit the shape drawing of components . Double-click to open C modular , And then choose Edit Image.

   A graphic editing window will open , In this window, you can edit the component shape by yourself .

   After editing, see the following ：

   Close the graphic editing window after editing , At this point, you can see in the simulation circuit diagram C The input / output port of the module will have a text prompt .

Universal C modular

   Call general C The steps of the module are . Open the menu bar Elements — Other — Function Blocks — C block.

   Universal C Modules and simplicity C The use of modules is basically the same , General C The module is placed in the circuit , Then double click to open .

   And simple C Module comparison , Universal C A function type option is added to the module . The functions of these function types are concluded below .

Variable / Function definitions : Define the header file or variable required in the code .

OpenSimUser Fcn: Call the code here once to set the system initialization at the beginning of simulation .

**RunSimUser Fcn：** Here are the specific execution functions C Code . In the simulation process , Each time step calls the code in the secondary module .

CloseSimUser Fcn： Call the code here once when the simulation exits .

   And simple C Module comparison , Universal C The module adds the code before the function is run and after the function is executed . It is equivalent to adding an initialization and collection function to the function .

   Do the same for C Module code . Here, the input and output ports are set to one , The function of the code is that the output signal is twice the input signal . The code is written in RunSimUser Fcn Inside the module . The other three modules don't matter , Just use the default code .

   The I / O port here is not x and y 了 , It is in and out Of Array .

   The current module is a function , All parameters are passed in from the function entry . About the detailed usage of this module , Can point Help Button to view the help document of the system .

   After writing the code , You can choose Edit Image Button , Yes C Edit the graphic symbols of the module .

   Finally, build a simple circuit to test .

   The simulation waveform is as follows ：

   It can be seen from the waveform that , The output signal is the same as the input signal 2 times .

   From the above two tests, we can see , simplify C Modules and common C The use of modules is basically the same . But here we should pay attention to one thing , Every C Variables in a block are not valid for other C It is invisible to the program block . take C The value in the block is passed to another C The only way to program a block or other circuit , It is through C The input and output ports of the program block . When C The output of a block is directly connected to another C When inputting a program block , Simulation software runtime , First run the 1 individual C Block , Then run the second C Block .

   Finally, a slightly more complex example is used to demonstrate C Usage of modules .

   A sine wave generator is used to generate a frequency of 60Hz, The range is 1V The sine wave of . Then use the system's own effective value calculation tool to calculate the effective value of the current sine wave . Send this sine wave to a C Module , adopt C Code to calculate the effective value of the current sine wave . Finally, compare whether the effective values calculated respectively are the same .

   Compiling C The code is as follows ：

  C The code implementation idea is ： When the system uses this module at each time step , The sum of the squares of the current input voltage is accumulated , When a period of sampling is completed , Average the cumulative sum , And then we'll make a prescription .

   The simulation waveform is as follows ：

   It can be seen from the simulation waveform that , System native RMS The results calculated by the value calculation tool and C The result calculated by the module is the same .