Six Pulse Generator Simulink Tutorial Pdf

Six pulse generator simulink tutorial pdf

I will explain you the working of inverters, more specifically 3 phase inverters.

Inverters are one of the very basic circuits of electronics, also known as the opposite of rectifiers. At the start a comprehensive introduction of inverters as well as 3-phase inverters is provided along with the types of inverter and the effect of its types on the output.

We will also discuss the difference between both the types of inverters i. At the end a basic exercise is provided so that you can solve it on your own and it will strengthen your knowledge about inverters. In electrical engineering inverters are one of the basic circuits used and are mostly used in UPS Uninterrupted Power Supply which is present in almost every house now a day. The basic purpose of an inverter is to convert the Direct Current DC to alternating current AC , which is no doubt the opposite of rectifiers.

For the beginners, the definition of AC voltage can be taken as the voltage which changes its direction from positive voltage to negative across same terminal in a specified period of time over and over again. A simple sinusoidal wave is an AC wave. However, DC can be defined as a constant source of voltage which remains either positive or negative through the course of time.

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Single phase inverter is the type of inverter in which only one DC source is used and the output thus formed is a single phase AC waveform. Alternatively, a three phase inverter uses two input DC sources, using 6 IGBT transistors to convert DC voltage into AC voltage and the output of such a circuit will be a three phase AC waveform with a phase difference of In the explanation below, we will design a three phase inverter in Simulink.

Create a new blank model and save it in the first hand so you can access it in future. In the library browser select the section named simscape as shown in the figure below,. In this section select the block named power system as shown below,.

Six pulse generator simulink tutorial pdf

From this section, now select Specialized Technology block as shown in the figure below,. Now go to the fundamental block present in this section as shown below,. In this section go to the power electronics block, in this block all the elements related power electronics are provided as shown in the figure below,. In an inverter as we know, thyristors are used in place of diodes as in rectifiers.

Design Three Phase Inverter using Simulink MATLAB

Place 6 such diodes on the model we created previously and arrange them in three rows having 2 thyristors each. Connect all of them to make a bridge as shown in the figure below,. Now double click on the thyristor block and in the block parameters dialog box, uncheck the point of showing measurable port as shown in the figure below,.

In the library browser, go back to the fundamental block section as we have used before, and select the block named power gui and add it to the model as shown in the figure below,. This block contains the definition of all the power blocks used in simulink and acts like a startup file for the model. Now in the fundamental blocks section go to the sources section as shown in the figure below,.

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In this block select the DC source input of an inverter and add it to the model as shown in the figure below,. To provide pulses to the thyristor we also need to place pulse generators to the model. In the library browser search for the pulse generator in the search bar and add the pulse generator to the model as shown in the figure below,.

We need a different pulse generator for each of the thyristor hence place 6 different pulse generators for every thyristor.

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Now for the output side select the measurement block in the fundamental blocks section and in this section select the block named voltage measurement as shown in the figure below. As we are working with 3-phase inverter so we need to place three such measuring devices. Also we have to place the load to observe the output of he inverter.

Six pulse generator simulink tutorial pdf

From the fundamental blocks section, select the block named elements and in this section select the series RLC branch and place it to the model as shown in the figure below,. Also in order to observe the output we need to place oscilloscope, place 3 scope blocks from the library browser on the model as shown in the figure below,.

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The last thing to place is the ground, from the same section as of load, select the block named ground and place it in the model as shown in the figure below,. At the input side of the bridge we created previously, connect the DC voltage source and at the output connect the load change the RLC load to only resistive load with each branch to each row as shown in the figure below,. Arrange all the 6 pulse generator with each of the thyristor and connect them. The phase shift of the first pulse generator will be 0 degrees and 60 degrees of the second and so on.

The parameter settings of first block is shown in the figure below,. All the six pulse generators connected are shown in the figure below,.

At the output connect the voltage measurement across each resistor and connect the scope at the output of each voltmeter as shown in the figure below,. Run the simulink model as we have been doing in previous tutorials and double click on the scope to see the output.

Six pulse generator simulink tutorial pdf

The output will be a three phase AC as shown in the figure below,. Change the layout of the scope to three frames and the output will look like as shown in the figure below,. Hint: Number of transistor to be used will be 4. Tried this exact circuit, do not know what I am doing wrong but I do not get the same three phase waveforms at all. I have used the correct switching pulses and checked the waveforms but the output voltages are not right at all.

Notify me of follow-up comments by email. Notify me of new posts by email. Introduction to Inverters In electrical engineering inverters are one of the basic circuits used and are mostly used in UPS Uninterrupted Power Supply which is present in almost every house now a day. Types of Inverters Inverters can be classified into two major types Single phase inverter. Three phase inverter.

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Single phase inverter Single phase inverter is the type of inverter in which only one DC source is used and the output thus formed is a single phase AC waveform. In the library browser select the section named simscape as shown in the figure below, Figure 1: Simscape In this section select the block named power system as shown below, Figure 2: Power system From this section, now select Specialized Technology block as shown in the figure below, Figure 3: Specialized Technology block Now go to the fundamental block present in this section as shown below, Figure 4: Fundamental blocks In this section go to the power electronics block, in this block all the elements related power electronics are provided as shown in the figure below, Figure 5: Power electronics block In an inverter as we know, thyristors are used in place of diodes as in rectifiers.

Six pulse generator simulink tutorial pdf

Connect all of them to make a bridge as shown in the figure below, Figure 7: Three phase bridge Now double click on the thyristor block and in the block parameters dialog box, uncheck the point of showing measurable port as shown in the figure below, Figure 8: Measurable port In the library browser, go back to the fundamental block section as we have used before, and select the block named power gui and add it to the model as shown in the figure below, Figure 9: Power gui This block contains the definition of all the power blocks used in simulink and acts like a startup file for the model.

Now in the fundamental blocks section go to the sources section as shown in the figure below, Figure Electrical sources In this block select the DC source input of an inverter and add it to the model as shown in the figure below, Figure DC source To provide pulses to the thyristor we also need to place pulse generators to the model.

In the library browser search for the pulse generator in the search bar and add the pulse generator to the model as shown in the figure below, Figure Pulse generator We need a different pulse generator for each of the thyristor hence place 6 different pulse generators for every thyristor.

Design Three Phase Inverter using Simulink MATLAB

Figure Voltage measurement Also we have to place the load to observe the output of he inverter. From the fundamental blocks section, select the block named elements and in this section select the series RLC branch and place it to the model as shown in the figure below, Figure Load Also in order to observe the output we need to place oscilloscope, place 3 scope blocks from the library browser on the model as shown in the figure below, Figure Scope The last thing to place is the ground, from the same section as of load, select the block named ground and place it in the model as shown in the figure below, Figure Ground At the input side of the bridge we created previously, connect the DC voltage source and at the output connect the load change the RLC load to only resistive load with each branch to each row as shown in the figure below, Figure Load and source Arrange all the 6 pulse generator with each of the thyristor and connect them.

All the six pulse generators connected are shown in the figure below, Figure Pulse generator connected At the output connect the voltage measurement across each resistor and connect the scope at the output of each voltmeter as shown in the figure below, Figure Block diagram Run the simulink model as we have been doing in previous tutorials and double click on the scope to see the output. Great Simulation!