Simple Electric Question That’s Should Know Mechanical Engineer!!!
Simple Electric Question That’s Should Know Mechanical Engineer!!!
Question
Number 1: What Is Electric Motors?
Answer:
An electric motor is an electro chemical
device that converts electrical energy into mechanical energy. Most electric
motors operate through the interaction of magnetic field and current carrying
conductors to generate force.
Question
Number 2: On What Principle Electric Motor Works?
Answer:
The Motor Principle: when a current-carrying
conductor is located in an external magnetic field perpendicular to the
conductor, the conductor experiences a force perpendicular to itself and to the
external magnetic field. The physical principle behind production of mechanical
force by the interactions of an electric current and a magnetic field.
The right-hand rule for force on a conductor
can be used to determine the direction of the force experienced on the
conductor.
Question
Number 3: How Many Types Of Electric Motors Are There?
Answer:
Mainly
there are two types of electric motors:
o
AC
motors
o
DC
motors
Question
Number 4: What Are The Advantages And Disadvantages Of Ac Motors?
Answer:
Advantages
of AC Motors:
Ø Low cost,
Ø long life,
Ø high efficiency,
Ø large ratings available (to
1 MW or more),
Ø Large number of
standardized types.
Disadvantages
of AC Motors:
Ø Starting inrush current can
be high,
Ø Speed control requires
variable frequency source.
Question
Number 5: What Are The Advantages And Disadvantages Of Dc Motors?
Advantages
of DC Motors:
Ø Precision positioning,
Ø High holding torque,
Ø Long lifespan,
Ø Low maintenance,
Ø High efficiency
Disadvantages
of DC Motors:
Ø Some can be costly,
Ø Require a controller,
Ø Higher initial cost,
Ø Requires a controller.
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