From d6fd637a4419aea1310974ba05ad9a9db7f9019a Mon Sep 17 00:00:00 2001
From: Virtual Labs IIT Delhi <71967438+vlabsdev-iitd@users.noreply.github.com>
Date: Tue, 3 Sep 2024 14:53:44 +0530
Subject: [PATCH] Update theory.md

---
 experiment/theory.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/experiment/theory.md b/experiment/theory.md
index 0efba59..c57651d 100644
--- a/experiment/theory.md
+++ b/experiment/theory.md
@@ -103,7 +103,7 @@ Table-1. Switch states for full bridge Inverter-Unipolar switching
 <div style="float: left; width:100%;"><br>
 <center>
 
-  **MULTIPLE-PULSE WIDTH MODULATION (SPWM)**     
+  **MULTIPLE-PULSE WIDTH MODULATION**     
 </center>
 </div>
 
@@ -194,7 +194,7 @@ where T<sub>s</sub>=T/2p.
 **SINUSOIDAL-PULSE WIDTH MODULATION (SPWM)**
 <br>
 
-- For realizing SPWM, a high-frequency triangular carrier wave is compared with a sinusoidal reference of the desired output frequency. 
+- For realizing SPWM, a high-frequency triangular carrier wave is compared with a sinusoidal reference of the desired output frequency. (Unipolar PWM) 
 - The intersection of carrier and reference waveforms determines the switching instants of the devices. 
 - The PWM scheme is illustrated in Fig. 4 in which ‘v<sub>c</sub>’ is the peak value of triangular carrier wave and ‘v<sub>r</sub>’ that of the reference signal. 
 - The switches of the inverter are controlled based on the PWM generated above.