This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “PWM Inverters-5”. 1. In case of multiple pulse width modulation method, if the amplitudes of the reference wave and the carrier wave are made equal then, the pulse width = a) ∞ b) 0 c) 100 ° d) none of the mentioned … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “PWM Inverters-4”. 1. In pulse width modulated inverters, the output voltage is controlled by controlling the a) input frequency b) modulating index c) amplification factor d) none of the mentioned 2. In case of sinusoidal pulse width modulation with MI < 1, … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “PWM Inverters-3”. 1. In the multiple pulse width modulation method, the firing pulses are generate during the interval when the a) triangular wave exceeds the square modulating wave b) square modulating wave exceeds the triangular wave c) square wave amplitude is same … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “PWM Inverters – 2”. 1. In case of a single-pulse width modulation with the pulse width = 2d, to eliminate the 5th harmonic from the output voltage waveform, the value of the pulse width (2d) must be equal to a) 72° b) … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “PWM Inverters-1”. 1. In the single-pulse width modulation method, the output voltage waveform is symmetrical about __________ a) π b) 2π c) π/2 d) π/4 2. In the single-pulse width modulation method, the output voltage waveform is symmetrical about ____________ in the … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “Voltage Control in Inverters”. 1. The external control of ac output voltage can be achieved in an inverter by a) connecting a cyclo-converter b) connecting an ac voltage controller between the output of the inverter and the load c) connecting an ac … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “3-Phase Bridge Inverters-3”. 1. The 120° mode of operation of a three phase bridge inverter requires ___________ number of steps. a) 2 b) 4 c) 6 d) 8 2. In case of the 120° mode of operation, __________ devices conduct at a … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “3-Phase Bridge Inverters-2”. 1. The conducting SCRs from 180 to 240 degrees would be a) 6, 1, 2 b) 2, 3, 4 c) 3, 4, 5 d) 5, 6, 1 2. What is the peak value of phase voltage in case of … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “3-Phase Bridge Inverters-1”. 1. Identify the below given circuit. a) Three-phase bridge regulator b) Three-phase bridge type semi-converter circuit c) Three-phase bridge thyristor inverter d) Three-phase bridge IGBT inverter 2. A three-phase bridge inverter requires minimum of _____________ switching devices. a) 3 … Read more
This set of Power Electronics Multiple Choice Questions & Answers (MCQs) focuses on “Force-Commutated Inverters”. 1. In voltage fed thyristor inverters __________ commutation is required. a) load b) forced c) self d) any commutation technique can be used 2. The McMurray circuit is a a) commutation circuit b) force commutated VSI c) self commutated VSI … Read more
