Psim Simulation Software Crack Works
Vicki Patolot
Engineers are using MATLAB, PSPICE and PSIM software tools for their circuit simulation in power electronics circuits. In this article rectifier and inverter circuits simulation were performed in the MATLAB, PSPICE and PSIM environment and anlysed the comparison results. Rectifier and inverter are the power electronic circuits which were highly used in all power supply units. The paper explains the theoretical approach of these circuits and then the simulation results are given in order to show the effectiveness of the system in the simulation arena.
MATLAB is numeric computation software for engineering and scientific calculations. MATLAB is being used for circuit theory, filter design, random processes, control systems and communication theory. MATLAB matrix functions are shown to be versatile in doing analysis of data obtained from electronics experiments. The graphical features of MATLAB are especially useful for display of frequency response of amplifiers and illustrating the principles and concepts of semiconductor physics. The interactive programming and versatile graphics of MATLAB is especially effective in exploring some of the characteristics of devices and electronic circuits. PSIM is simulation software specifically designed for power electronics and motor drives. With fast simulation and friendly user interface, PSIM provides a powerful simulation environment for power electronics, analog and digital control, magnetics, and motor drive system studies. Powersim develops and markets leading simulation and design tools for research and product development in power supplies, motor drives and power conversion and control systems. SPICE is an acronym for Simulation Program with Integrated Circuit Emphasis and was inspired by the need to accurately model devices used in integrated circuit design. It has now become the standard computer program for electrical and electronic simulation. The majority of commercial packages are based on SPICE2 version G6 from the University of California at Berkeley although development has now progressed to SPICE3. The increased utilization of PCs has led to the production of PSPICE, a widely available PC version distributed by the MicroSim Corporation whilst HSPICE from Meta-Software has been popular for workstations and is now also available for the PC. One of the reasons for the popularity of Pspice is the availability and the capability to share its evaluation version freely at no cost. This evaluation version is very powerful for power electronics simulations.
Fig. 1 shows SCR based full bridge inverter circuit diagram in PSIM. In this circuit Vs is 100v, load R-L, resistance is 1kohm and inductance is 1m henry. The SCR switching frequency is 1k hertz. The output wave form shown in fig.2 in this wave sinusoidal output voltage is 100v and output current 0.1amp.
Fig. 3 shows MOSFET based full bridge inverter circuit diagram in MATLAB. In this circuit Vs is 100v, load R-L, resistance is 1kohm and inductance is 1m henry. The SCR switching frequency is 1k hertz. The output wave form shown in fig.4 in this wave sinusoidal output voltage is 100v and output current 0.1amp.
Fig.7 shows the power circuit of the fully controlled single-phase PWM converter in PSIM, which uses four transistors with anti parallel diodes in SCR bridge block to produce a controlled dc voltage Vo. Using a bipolar PWM switching strategy, this converter may have two conduction states:
In this topology, the output voltage Vo must be higher than the peak value of the ac source voltage vs in order to ensure proper control of the input current. The input voltage value Vs= 200v, switching frequency is 1KHz. After simulation the output voltage and current wave form with resistive load is shown in fig. 8. In this wave harmonics are presence.
In MATLAB the simulat ion has been carried out for rectifier in Simulink block set. Here the full wave rectifier is used which conducts for both positive and negative half cycles respectively. Fig.9 shows the circuit diagram for full wave rectifier and the corresponding input and output waveforms are shown in Fig.10.The specifications of the circuit are: Input AC Vo ltage=48V, Load resistor=100Ω and employing 4 diodes for rectification. The output thus obtained is a waveform without using a filter circuit. By employing a filter circuit a pulsating DC waveform can be obtained. The circuit is uncontrolled full bridge rectifier. For a controlled rectifier thyristor switches can be used.
PSPICE based simulation for full bridge rectifier is shown in Fig.11. The corresponding input and output voltage waveforms are shown in Figs. 12 and 13 respectively. The circuit specifications are input AC Voltage=20V, frequency=50Hz and load resistor=100Ω.
PSpice allows mult iple plots to be viewed simultaneously, such as voltage, power, etc. Also, specific points, such as a voltage at a certain time, can be selected and marked on the output plot in PSpice,
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