In order to compare the three results, merge the plots in one. You will see the critically damped response. Note: If you connect the Oscilloscope to the circuit and run the simulation, a similar analysis is performed.
#Multisim transformer series
Results are displayed in Figure 4.Īs you can see, this is the typical underdamped response of a series RLC circuit. Click the Add button to move the variables to the right side under Selected variables for analysis, as shown below.įigure 3. Output variables for the Transient Analysis.Select the Variables in circuit list, select All variables from the drop-down list, and then highlight V(vi) and V(c) from the list.You can reset all the parameters to their default values by clicking the Reset to default button.įigure 2. Analysis parameters for the Transient Analysis. Configure the Analysis Parameters as shown in Figure 2.Note that these are the same parameters that were defined in Table 1, however, in Multisim you do not have to worry about the complex SPICE syntax. TRAN initializes a Transient Analysis is the time increment for reporting results is the final analysis time is the start time for reporting results is the maximum step size used in incrementing the time during the analysis is used for initial conditions. Note: In SPICE, the command that performs a Transient Analysis has the following form: This becomes enabled when the Maximum timestep (TMAX) checkbox is selected. Enable to generate time steps automatically.Įnable to set a time interval for simulation output and graphing.Įstimate maximum time step based on netlist (TMAX) Maximum time step the simulation can handle. Minimum number of points between start and stop times. Must be greater than start time.Įnable to manually set time steps. Start time of Transient Analysis. Must be greater than or equal to 0 and less than end time.Įnd time of Transient Analysis. If the simulation fails, it uses user-defined initial conditions. Multisim tries to start the simulation using the DC operating point as the initial condition. Automatically determine initial conditions.Multisim first calculates the DC operating point of the circuit, then uses that result as the initial conditions of the Transient Analysis. The analysis starts from initial conditions as set in the Transient Analysis window. The analysis starts from zero initial conditions. Table 1. Parameters used in Transient Analysis. Table 1 describes the Analysis Parameters tab in detail. The default settings are appropriate for normal use, providing the transient response of the selected output variables starting at time 0 seconds and stopping after 1 ms. Select Simulate✺nalyses»Transient Analysis.Open circuit file series_rlc.ms11 located in the Downloads section.3Ĭomplete the following steps to configure and run a Transient Analysis: Since α depends on the value of the resistance, you will use three different values for R: 40 W, 200 W and 1 kW. In this example you will use Transient Analysis to plot the step responses of the RLC circuit. Note that as the value of α increases, the RLC circuit is driven towards an overdamped response.
The value of the damping factor ( α) in relation to the natural frequency ( ω 0) determines the behavior of the circuit’s response. Where α is the damping factor and w 0 the natural frequency (or resonant frequency). According to the theory, the characteristic equation modeling this circuit can be represented as: Numerical integration is used to calculate the quantity of energy transfer over an interval of time.Ĭonsider the series RLC circuit shown in Figure 1. Capacitors and inductors are represented by energy storage models.
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