In which is the maximum torque that

In this modern day, motor is one of the most essential
machine that is widely used in daily life. It is basically applied in rotating
mechanical system. Electric motor can be defined as an electrical machine that
converts electrical energy into mechanical energy. The conversion of mechanical
energy into electrical energy is the reverse of electric motor and is done by
an electric generator which has much in common with motor. The working
principle on most electric motors is basically through the interaction between
an electric motor’s magnetic field and winding currents to generate force. Take
regenerative braking with traction motors in the transportation industry as an
example, electric motors can also be used in reverse as generators to convert
mechanical energy into electric power.

To design and select suitable type of motor drive
system, many factors need to be taken into consideration. The most important
factor is the mechanical design. The design must be decided according to the
specification needed. Next, the output in kW/HP. There are two principle limitations
for selecting the motor output. First, the mechanical limitation. The breakdown
torque which is the maximum torque that the motor can produce when operating
without stalling. This is a critical design factor in motor applications,
particularly for the motors subjected to occasional extreme load conditions.
Another critical factor is the locked-rotor torque which is the maximum torque
that the motor can produce during start up from steady-state condition, a
critical design feature for conveyor drives. The next principles is electrical
limitation due to insulation provided on the motor windings. The electrical
load on the motor can be imposed till the winding insulation is able to
withstand the prescribed temperature rise over an ambient for that particular
class of insulation. Life of the motor greatly depends on the temperature rise
of the windings. The other factor is speed of the motor. Majority of the motors
are directly coupled with the driven equipment where in the speed of the motor
and the driven equipment will be same. In order to meet the speed of the driven
equipment, the devices like qearbox, chains or belts are introduced between
motor and driven equipment. Thus, it may be necessary to provide the rotor
shaft suitable for its attachment with the speed decreasing or increasing
device and hence the specification should include such specific requirement.
Other consideration that need meet is the wiring, supply and load with the
environment factor of the motor.

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Before selecting correct type of motor system, this
report will demonstrate each step by step in acquiring the right motor from
several of list of the catalogue. Hence the understanding of principles of
motor system are crucial before the selection is being made. The specification
made are based on the Oriental Motor General Catalogue in order to standardized
among the students.

An example of conveyor systems is a belt conveyor
system. This system consists of two or more pulleys with an endless loop of
carrying medium (conveyor belt) that rotates around them. There are two main
industrial classes of belt conveyors, first those in general material handling
such as those moving boxes along inside a factory and secondly a bulk material
handling such as those used to transport large volumes of resources and
agricultural materials such as grain, salt, coal, ore, sand, overburden and

The selection of motor type system are made based on
calculations and analysis before undergoes the motor selection process. Then
the motor selected will be finalized and recalculated to make sure the motor is
able to fulfill the entire requirement that satisfy the purpose.

Usually a multipurpose luggage conveyor system
is installed in airports that transports checked luggage from ticket counters
to areas where the bags can be loaded onto airplanes. It is called a baggage
handling system (BHS) and can be found lots in airport. For our type of system
it is cost effective and user friendly


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