18 Questions
What is the percentage of electrical consumption saved by an inverter air conditioner compared to a non-inverter?
44%
Which of the following is NOT a power converter application?
Medical equipment
What type of lighting system can save up to 68% of energy compared to traditional lighting systems?
LED lights
Which of the following devices uses a power converter to provide a stable output voltage?
All of the above
What is the main application of power converters in electric vehicles?
Motor drives
What is the primary function of a power converter in an Uninterruptible Power Supply (UPS) system?
To regulate the output voltage
What type of power supply is used to provide continuous power to critical loads during main power supply failures?
Uninterruptible Power Supply (UPS)
In DC motor drives, what is the purpose of the armature constant (K)?
To determine the motor's electromotive force (EMF)
What type of motor is commonly used in hybrid/electric vehicles?
Permanent Magnet DC Motor
What is the purpose of a UPS in medical equipment and hospitals?
To provide backup power during power outages
What happens to the motor speed (ω) in a Separately Excited DC Motor when the load torque (Td) changes?
The motor speed decreases with increasing load torque
What is a common application of power converters in financial institutions?
Banks and financial tech companies
What is the value of Ia2 in terms of Ia1 and flux values?
Ia2 = Ia1 × φ2 / φ1
What is the type of drives that uses controlled rectifiers or choppers?
DC motor drives
For a single-phase full-wave converter drive, what is the expression for Va?
Va = 2Vmax × cos(α)
What is the purpose of a full-wave converter in a DC motor drive?
To control the motor speed
What is the condition for a single-phase half-wave converter drive?
SCR conducts up to 180°
What is the unit of the constant load torque mentioned in the example?
Nm
This quiz covers the applications of power converters in DC motor drives, including heating and lighting control, electric traction, and more. Learn about the principles and use cases of power electronics in drives. Part of the ECCE4467 course at Sultan Qaboos University.
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