Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Which of motor is used for mixture?
Repulsion
Reluctance
Hysteresis
Universal
Universal
A universal motor is used in mixies/grinders because of its high starting torque and extremely high operating speeds, which typically range from 3,000 to 20,000 RPM. It can run efficiently on both AC and DC supply, making it ideal for high-speed portable household appliances.
A universal motor is used in mixies/grinders because of its high starting torque and extremely high operating speeds, which typically range from 3,000 to 20,000 RPM. It can run efficiently on both AC and DC supply, making it ideal for high-speed portable household appliances.
TтИЭI2 тАФ Torque proportional to the square of armature current
NтИЭ╬жEbтАЛтАЛ тАФ Speed inversely proportional to flux per pole
It operates on the principle of a series-wound DC motor. When connected to an AC or DC source, current flows through both the field winding and armature in series, keeping the direction of torque consistent even as alternating current reverses polarity.
High operating speeds (up to 20,000 RPM) suitable for grinding and liquidizing.
Non-linear speed-load characteristic; runs at extremely high speeds on no-load.
Armature core and stator are both laminated to reduce eddy current losses under AC operation.
High starting torque and high operational speed
Compact and lightweight for portable appliances
Can operate on both AC and DC single-phase supply
High noise level at full speed
Brushes and commutator cause sparking and require regular maintenance
Poor speed regulation at varying loads
Food mixers and grinders
Electric hand drills and portable tools
Vacuum cleaners and sewing machines
Option A (Repulsion): Used in high starting torque applications requiring variable speed control, but bulky for small domestic appliances.
Option B (Reluctance): Used in constant-speed applications like timing devices and recording instruments.
Option C (Hysteresis): Provides constant torque and silent operation, commonly used in sound equipment and clocks.
D is correct тАФ A universal motor provides the high starting torque and ultra-high speeds needed for food mixers and grinders.
Always remember that appliances requiring high speed and compact size (mixers, vacuum cleaners, hand drills) rely on universal motors due to their high torque-to-weight ratio.