Three phase space vector pulse width modulation using pic microcontroller

Hi everyone, I hope you are doing well. In this article, I am going to present a project on Three phase space vector pulse width modulation using pic microcontroller. Three phase space vector pulse width modulation or SVPWM has many applications in power electronics projects. Three phase SVPWM used in three phase induction motor drive projects and it is also used in three phase sine wave inverter design. Three phase SVPWM signals are used to drive three phase H bridge. Three Phase H bridge consists of six MOSFETS or IGBTS.

You may also like to check other power electronics projects given below:

• Pure sine wave inverter using pic microcontroller
• pure sine wave inverter using arduino
• three phase SVPWM using 8051 microcontroller
• induction motor speed control 
• SPWM generation using pic microcontroller 
• Sine wave inveter using dspic microcontroller

So Now lets start with introduction to SVPWM or space vector pulse width modulation.  First I will discuss basics of SVPWM and then I will discuss how to generate three phase SVPWM using pic microcontroller. After that I will discuss the working of my project with pic16f877a microcontroller.

Introduction to SVPWM or space vecor pulse width modulation

If you already know about PWM or pulse width modulation, then it is very easy for you to understand SVPWM. SVPWM is basically a algorithm which is used to control pulse width modulation via space vector technique. It is used to drive three phase motors. This technique is used to convert the dc voltage into three phase pulsating three phase PWM waves. These pulsating three phase PWM waves are used to create three phase sine wave using three phase H bridge. 

The main application of SVPWM is three phase motor space vector control. This technique is also known as space vector modulation.  It is used to create three phase alternating current wave forms to drive three phase motors like induction motor. The above picture shows the actual working of SVPWM algorithm.

SVPWM generation using pic microcontroller

Simulation of space vector pulse width modulation generation using pic16f877a microcontroller.

As you can see in simulation, six pulsating PWMs are generating out of PIC16F877A microcontroller. These six pulsating PWMs can be fed to three phase H bridge to generate three phase sine wave.

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