Question
Download Solution PDFIn 60‐degrees PWM inverter power supply,
A. Power devices are made 'ON' for 1/3 of the cycle.
B. Power devices are made 'OFF' for 1/3 of the cycle.
C. The phase voltage = 0.57735 Vsupply.
D. Line voltage = Vsupply.
E. Line voltage < Vsupply.
Choose the correct answer from the options given below:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFPulse width modulation
In the given figure, 2d represents the total pulse width or the time duration for which the device is conducted in the one-half cycle (80°)
In 60-degree PWM, the device conducts for 120°.
So, the device is made 'ON' for 2/3 of the cycle. Hence, statement A is incorrect.
and the device is made 'OFF' for 1/3 of the cycle. Hence, statement B is correct.
The phase voltage is given by:
The phase voltage = 0.57735 Vsupply
Hence, statement C is correct.
The line voltage in PWM is always less than the supply voltage.
Hence, statement E is correct.
The correct answer is option A.
Last updated on Jun 19, 2025
-> The UGC NET City Slip 2025 has been released on its official website today.
-> The UGC NET June 2025 exam will be conducted from 25th to 29th June 2025.
-> The UGC-NET exam takes place for 85 subjects, to determine the eligibility for 'Junior Research Fellowship’ and ‘Assistant Professor’ posts, as well as for PhD. admissions.
-> The exam is conducted bi-annually - in June and December cycles.
-> The exam comprises two papers - Paper I and Paper II. Paper I consists of 50 questions and Paper II consists of 100 questions.
-> The candidates who are preparing for the exam can check the UGC NET Previous Year Papers and UGC NET Test Series to boost their preparations.