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Seri Sumbawarni Binti Haryani  151191936

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Seri Sumbawarni Binti Haryani  151191936

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One of the important factor that need to be taken into account when selecting a motor for particular application is ambient temperature. As for the standard in motor,ambient temperature and allowable temperature rise are used to determine the rating for a motor.
The electric motor industry standard for ambient temperature is 40°C. The motor rating is determined by gradually increasing the load of a motor until its steady state temperature rise reaches the allowable temperature rise for the insulation class. So, if a motor application has a high ambient temperature (above 40 °C) or needs extended life (greater than 20,000 hours),  the motor that is supposed to be used must be designed with the correct insulation system
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I think one of the important factor that need to consider when selecting a motor is  the by the economic factor. economic factor considering the  :
-Fuel /Power Costs
- Efficiency
- Maintenance Costs
- Capital Costs (including installation and instrumentation)
-Operational Costs (other than fuel and maintenance)
-Delivery/Construction/Startup Time
Cost elements always have a major influence on any compressor and drive selection. In most cases, the total combined lifetime cost of each option is compared to determine which option is most economical.
All of these cost elements must be evaluated and compared for each individual compressor drive selection project.

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In my opinion, the important factor thet need to be considered are
1. Battery Voltage
The battery voltage is dependent on the size of the vehicle. As the battery voltage increases, the current output is lowered.

2.Maximal power

Some grades need to be climbed at a minimum speed some others don’t. Sometimes the maximum power is found simply at maximum speed (this is the case where the vehicle as a large frontal area or goes at very high speed). This translates to having a motor powerful enough to go through all the different conditions the vehicle can be submitted to!

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The important factor in selecting motor are including the electric voltage supply and the maximum value (and range) of rotational speeds that you need for the application

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The important factor in selecting motor are including the electric voltage supply and the maximum value (and range) of rotational speeds that you need for the application

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Nur Syafiqah Alodin                                                                                                        In my opinion ,motor speed is very important factor that need to look into before choosing a motor as the speed will affect the efficiency of the motor. Not just that the speed also will determine the effectiveness of that particular project. 

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Nur Syafiqah Alodin                                                                                                        In my opinion ,motor speed is very important factor that need to look into before choosing a motor as the speed will affect the efficiency of the motor. Not just that the speed also will determine the effectiveness of that particular project. 

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One of the factors that be considered for me are motor efficiency. This is because
it can save the use of money or energy more compared to the less efficient. Furthermore it can produce more power with the less use of energy. Others factor also must be considered but for me efficiency is the most important factor when come to select the motors.

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depending on the size of the application . As example, if we are going to run a small project such as mini robotic car, a small motor will be suitable.if the project is large size, a small motor will not be suitable as it will have a slow response and might burn out the motor.

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In my opinion,factors that need to be taken into account when selecting a motor for particular application are Knowing which one to use depends on the industrial application and if there are any special needs required.
A constant or variable torque and horsepower will be required for the motor depending on the type of load the motor is driving. The size of the load, the required speed, and acceleration/deceleration particularly if it's fast and/or frequent will define the torque and horsepower that is required. Requirements for controlling motor speed and position also need to be considered. Other than that, cost also one of the factor that need to be considered.

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131191875
These are the importance that we need to consider when choosing a motor for a particular application.
1.  Know the load characteristics
2. Know the output in kW/HP
3. Speed of the motor
4. Power supply voltage and frequency variations
5.Different in rotor classes
6.Motor efficiency
7.Ambient temperature
8.Altitude
9. Methods of starting and number of starts
10.Duty cycle
11.Insulation class

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Mohammad Amir Zharif Bin Mohamad Azilan 151191907

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Mohammad Amir Zharif Bin Mohamad Azilan 151191907

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Operating conditions such as duty cycle, number of starts, ambient conditions, and data for location, environment, driven equipment are the important considerations for the motor efficiency and reliability. It is also imperative to seek advice of the motor manufacturer many a times if motor will be operated under any unusual service conditions to support the selection procedure.

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151191939

those criteria to be consider and acknowledge before selecting a motor :
1. What the load need to move?
2. What the speed need to run?
3. Does the load vary throughout the move?
4. Should recognize any special function needed on the application.
5. Suitable to use AC Power or DC power?
6. Finally the budget.

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I think the one factor that need to consider when selecting is mechanical limitation.The breakdown torque,which is the maximum torque that the motor can produce when operating without stalling. This is critical factor in motor application,particularly for the motors subjected to occasional extreme load condition.

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NIK NUR FARAHAIN IDAYU BT NIK MAN(151191913)

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NIK NUR FARAHAIN IDAYU BT NIK MAN(151191913)

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One of the important factors that need to be consider when selecting a motor is we must know the limitation of that application. By knowing the load applicatoon we can claculate the torqur and choose suitable motor.

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lifespan of the motor
-higher.lifespan such as brushless dc mototr can save maintenance requirement
Jiayin 151191891

Anonymous
1d
Jiayin 151191891
Is power .Since the higher the power, the higher the torque and the angular velocity .
The higher the power ,so the  machine can be operated at higher efficiency and can make the operation can be done quickly .This can increase company profit and economic of our country .

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Keep writing ! We will discuss it tomorrow in the class.

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Important factor to select a motor:
In my opinion, the factor to be consider when choosing the motor are try to match the motor to its environment: heat, humidity, corrosion, accessibility, hazardous location classification, and particulate concentration. Consider physical mounting, the diameter and length of the output shaft, and the amount of tolerable noise. Also need to know the types of torque that will be dealing with.

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151191931 NURMAIZATUL SAADIAH BINTI MOHD KAMAL

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151191931 NURMAIZATUL SAADIAH BINTI MOHD KAMAL

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One of the important factor that need to be taken into account when selecting a motor for a particular application is the speed of motor. Speed application can be divided into two type which are constant speed and variable speed.

In a constant speed application, a motor often runs at an approximate speed with little or no concern about acceleration and deceleration ramps. This type of application is usually run using across-the-line on/off control. The control circuits often consist of a branch circuit fusing with a contactor, an overload motor starter, and a manual motor controller or soft starter.

Both ac and dc motors are suitable for constant speed applications. DC motors provide full torque at zero speed and have a large installed base. AC motors are also a good choice because they have a high power factor and require little maintenance.

Variable speed applications usually require tight velocity and speed changes as well as defined acceleration and deceleration ramps. Reducing the motor speed in application, such as fans and centrifugal pumps often improves efficiency by matching the power consumed to the load instead of running at full speed and throttling or dampening the output.

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MUHAMMAD NUR FITRI BIN NAZARUDDIN 151191911

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MUHAMMAD NUR FITRI BIN NAZARUDDIN 151191911

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In my opinion,the most important factors required to be considered when selecting a motor for any of particular application:

·        ->> Output In Kilowatt/Horsepower-Mechanical limitations and electrical limitations

·         ->>Speed Of The Motor-Most 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 gearbox, chains or belts are introduced between motor and driven equipment.

·         ->>Power Supply, Voltage And Frequency Variations-The permissible voltage variations is ±5 to ±10%,permissible frequency is 50Hz, ±3% and permissible combined variation is ±6%.The effect of under voltage is more serious than that of overvoltage. Continuous operation with under voltage condition increases the current at the rate of about 20% for every 5% reduction in the supply voltage, increasing the rated copper loss. This results into heating and prolonged temperature rise and finally the burning of winding. The  motor offers reduced efficiency at their overvoltage or under voltage.

·         ->>Different Rotor Classes-The rotor classes indicate against what quantum of the load torque the motor would be able to start easily. Have motor with KL10 class of rotor than KL16 class of rotor, because KL10 class of rotor could take maximum starting torque up to 180% of the full load torque. Such practice reduces the motor life in no uncertain terms.

·         ->>Motor Efficiency-The new motor efficiency standard could have major energy-saving impact for motors worldwide. Though standard motors are now available with a better efficiency, this factor (motor efficiency)requires due attention when making the selection of the motor for a specific application in view of substantial quantum of power consumed by the motors in the particular applications.

·         ->>Ambient Temperature-As per normal standards, the motor output is given by the vendors based on 40ºC ambient temperature. In order to maintain the motor output at higher temperature as per the power requirement of driven equipment, it may be necessary that the motor with a higher frame size for the same rating is selected to avoid adverse effect of derating.

·         ->>Altitude- Standard motor output  are specified by the manufacturers for site altitude up to 1000m.For altitudes of more than 1000m,the motor ratings required to be checked for its suitability to maintain the specified output, or otherwise the duration factor is to be applied to know actual anticipated output at higher altitude.

·         ->>Method Of Starting And Number Of Starts-The starting performance of the motor depends on the method starting deployed, i.e. Direction-line, star-delta, high resistance, auto transformer, variable frequency drive. Where the starting torque requirement is not so critical, the star-delta starting or any other reduced voltage method of starting is used. Where the starting with very heavy load, such as with hoist or crane drives and speed control over a wide range is required, it is advantageous to consider the slip-ring type(or wound rotor type)motor with a drum controller starter or resistance starter.

·         ->>Duty Cycle-Duty cycle is the load that a motor must handle over the period when it starts, runs, and stops. Continuous duty is by far the simplest and most efficient application. The duty cycle begins with startup, then long periods of steady operation where the heat in the motor can stabilize as it runs. A motor in continuous duty can be operated safely at or near its rated capacity because the temperature has a chance to stabilize. Intermittent duty is more complicated. The life of commercial airplanes is measured by their number of landings; in the same way, the life of a motor is proportional to the number of starts it makes. Frequent starts shorten life because inrush current at startup heats the conductor rapidly. Because of this heat, motors have a limited number of starts and stops that they can make in an hour.

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Ainun Solehah Binti Amrul Muhadi 151191879

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Ainun Solehah Binti Amrul Muhadi 151191879

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Important factor selected motor is power, torque and rpm, electrical specs like some dimensions, voltage, number of phases, as well like axle diameter for choosing pulley. Let is say it is some kind of midsize project that want to operate from shop or garage electric supply, 110 volts 60 cycle. Large variety of motors available. A small motor, say 1/2 hp or 3/4 hp it might do well but if the weight to be turned is heavy, like a truck wheel, you would either get very slow response or you would just burn out the motor devices.

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For me, one of the important factor that need to be taken into account when selecting a motor is velocity, or speed (RPM), can be complex regarding motors. The general rule is that motors run most efficiently at the highest speeds but it is not always possible if gearing is required. Adding gears will reduce the efficiency of the motor, so take into account speed and torque reduction as well.

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In my opinion, there are many important aspect that we need consider such as application,operational,mechanical and environment. We should know better what type of motor we need to choose.Next,variable speed applications usually require tight velocity and speed changes as well as defined acceleration and deceleration ramps. Reducing the motor speed in application such as fans often improves efficiency by matching the power consumed to the load instead of running at full speed and throttling or dampening the output.

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as for me i think it is important to consider the motor sizing. motor sizing refer to the process of picking the correct motor for a given load. let say if the motor is too small  so it may not have sufficient torque to start the load and run it up to the correct speed. even if it does get the load up  to speed the motor will overheat and burn. same goes if  the motor if too large the n it will operate inefficiently due to run below rated load plus money wasted here of buying large motor.

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From my own opinion,the important factors that  need to be taken in selecting a motor is the motor must have high efficiency .This is because to ensure that it can performs/works properly in the machine that to be used.
Besides,the motor also must have low voltage consumption so that we can save more energy.

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In my opinion it is important to consider the requirements beyond the noise of certain motor. All motors make some noise due to the moving parts, but for some applications that are in public space it is important to have a motor that operates as quietly as posibble.Therefore, it's depend to our own application or specific motor needs so that we knowwhat type of factor that should be to consider.

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In my opinion, the important factors that need to be taken into account when selecting a motor for particular application is efficiency.  A motor’s efficiency will vary depending on many factors. Efficiency factors are more important for electric motors bigger than one horsepower because they make up the majority of energy consumption. Fractional horsepower motors also tend to be more efficient than integral motors due to their construction and design.

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As an engineer,we must consider some important factors in selecting the motor for our design application(project).In my knowledge,there are some factors that we need consider in selecting the motor such as the speed,the torque and inertia,heat,budget and so on.In aspect of speed,we must check the rated or constant speed and maximum or peak speed of the motor that we consider.For the torque and inertia,we must consider either the motor can provide enough torque to move or not.We must ensure either the motor can have the enough speed to make the effective operation.We must also consider the weight of the mass that we are moving and consider either the motor can handle the acceleration and deceleration of the mass without overdriving the motor or not.We also need consider the aspect of heat.Heat is important when operating the motors.This is because,motors have a specific temperature range at which they should be run.As we know,motors produce heat when running,therefore fully enclosed areas with no air circulation will cause the motors to overheat
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the most important factor in selecting motor for particular application is to determine the overall condition for the motor to be applied. One of the important factor is electric supply. For an instance, certain application has a certain voltage to be operated. Therefore, selecting the motor that can be operated in certain voltage of application are very important to ensure the motor can be operated in permissible voltage

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I think one of the most important factors when selecting motor is duty cycle. Duty cycle is a fixed repetitive bad pattern over a given period of time which is expressed as the ratio of on- time to cycle period.

The reason why we consider this factor due to energy required to start electric motors is much higher than for steady-state operation. It could overheat electric motor or most probability overheat the motor. And when operating cycle need to operate for more than 25% of the time in accordance with its operating cycle, it becomes vital in sizing the motor.

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Important factor selected motor is power, torque and rpm, electrical specs like some dimensions, voltage, number of phases, as well like axle diameter for choosing pulley. Let is say it is some kind of midsize project that want to operate from shop or garage electric supply, 110 volts 60 cycle. Large variety of motors available. A small motor, say 1/2 hp or 3/4 hp it might do well but if the weight to be turned is heavy, like a truck wheel, you would either get very slow response or you would just burn out the motor devices.

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Know the load characteristics. For line-operated motors, loads fall into three general categories: constant torque, torque that changes abruptly, and torque that change gradually over time.
Get a handle on horsepower. Select only what you need, and avoid the temptation to oversize or undersize.

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For me the the factor need to be consider when choosing motor is to know the speed of the motor, we need to know if the motor can perovide the required speed for the application. Next factor is the load or weight to be applied to the motor so that the motor can handle the work or job without overdriving the motor

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One of the important factors is the size of motor.Often times, the space envelope in our design will dictate which motor can be used.Hence, we must then look at the speed and torque of motors within that size range so that the motor can properly operate within the system.

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The factor that need to taken is the properties of the vehicle such as size, weight, overload and aerodynamics are crucial vehicle characteristics that will ultimately determine speed, torque and power requirements of the electric motor. These aspects will help understand the effects of the operating conditions of the vehicle and are essential to the selection of the right powertrain. Have them within reach for the next steps.

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Seri Sumbawarni Binti Haryanik
151191936
As for the standard in motor,

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nur zalikha bt mohamad yatim
151191930
i think we need to consider the electric voltage supply available, the maximum value of rotational speed we need and moment of inertia of the rotating assembly. This can help us to know the torque requirement.

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At beginning, the motor must do three things:
-Start the equipment load
-Drive the load once it is started
-Survive the abuse of the surroundings in which it operate
Then the size of motor also a important factor due to it will refers to the power that it will develop when the motor is turning at full speed

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Maathiniyaar a/p Arumugam 151191903

In my point of view, I think we need to choose a motor that suitable for the equipment used. A good motor should provide balanced output with the given input at least up to 90% in order to perform work without wastage of energy. Besides, speed of the motor also has to be considered and normally motor run most efficiently at the highest speed of motor.Therefore selecting a suitable motor is very important regarding on the size , type and application of work to perform. Thank you.

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Nur Muhd Ubaidillah b. Abd. Rashid   151191925

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Nur Muhd Ubaidillah b. Abd. Rashid   151191925

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for me the important factors need to be taken when select a motor for particular application is the how fast we want the rotating assembly to accelerate because we does not need a 3600 rpm motor if we want to turn the load at 20 rpm and from this we also can save the cost too

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Step 1: Know the load characteristics
Step 2: Get a handle on horsepower
Step 3: Getting started. Another consideration is inertia, particularly during startup. Every load represents some value of inertia.
Step 4: Adjust for duty cycle. Duty cycle is the load that a motor must handle over the period when it starts, runs and stops.
Step 5: The last consideration, motor hypoxia.

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I think efficiency is a concern when selecting a motor. A good motor should provide balanced output with the given input at least up to 90% in order to perform work without wastage of energy.  Therefore selecting a suitable motor is very important regarding on the size , type and application of work to perform.

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in my humble thought, i think that there are a lots of factors that need to be taken when selecting a motor. the motor efficiency may be one of it. This is because the efficiency will direct affect the output of our project whether it is suitable to use or not. Next, we need to know get the higher efficiency motor with lower price. As we know, by decreasing the budget, we can get higher output and this will lead to higher income/ money.

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151193466 chelsea chin                              Ease of use: The project selection model should be convenient, easy to understand and use without requiring special interpretation.- Cost: the cost associated with using the select project selection model should be low relative to the cost of the projects and less than their potential benefits.

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151193466 chelsea chin                              Ease of use: The project selection model should be convenient, easy to understand and use without requiring special interpretation.- Cost: the cost associated with using the select project selection model should be low relative to the cost of the projects and less than their potential benefits.

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One of the important criteria needed to select right motor is knowing the requirement input for that motor. Either it is AC current or DC current. DC motor cannot be operated by using AC current because AC current produce higher voltage than the required voltage needed for the DC motor. Hence, we need to use relay to overcome this problem. So, its better for us to know the required input for that motor to avoid this situation.

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Efficiency of the motor also the important factor we need to consider. Motor efficiency is the ratio between the amount of mechanical work the motor performs and the electrical power it consumes to do the work, represented by a percentage. A higher percentage represents a more efficient motor. Electric motor efficiency is dependent on (but not limited to) design, materials, construction, rating, load, power quality, and operating conditions.  Efficiency factors are more important for electric motors bigger than one horsepower because they make up the majority of energy consumption. Fractional horsepower motors also tend to be more efficient than integral motors due to their construction and design.

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In my opinion,factor that need to be considered when selecting a motor 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.

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I think one of important factor for selecting motor is a constant or variable torque and horsepower that will be required for the motor depending on the type of load, the speed required and acceleration or deceleration. The requirements for controlling motor speed and position also need to be considered. Besides, reliability is important as in many cases, designer and engineer seeking reliability will oversize equipment which leading to sub-optimal energy performance. Another factor is ambient temperature.  Knowing the potential climate range can help when determining which materials, such as lubricating with oil or grease, are important to the construction of the motor.

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Torque requirement
- torque specifications is important when we want to repair or increase the engine performance.
- torque determines the amount of weight or load that motor capable to drive
- torque of a motor varies according to the drive speed.
- the sufficient amount of torque can give proper clamping between  component
- too much or too little torque applied can damage the component in the motor

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Important factor that need to consider when selecting a motor for a particular application are:

We need to know how much horsepower does the application required and then only buy the engine according to the horsepower. This is done to to save cost by not buying oversize or undersized engine.

Other than that we need to know  what type of current(AC or DC ) that is going to be used in our application so that we can buy an appropriate motor for that particular current.

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In my opinion, good ventilation is important because it helps protect and efficient your motor. All rotating electrical machines generate heat as a result of the electrical and mechanical losses inside the machine. Non-vent motors provide more protection against the elements than fan-cooled motors, but they also take much longer for the motor to cool down after operation

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Very interesting input from all of you. Good job !
Please feel free to give your opinion.

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151191909 mohd nidzam adzha bin abd aziz

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151191909 mohd nidzam adzha bin abd aziz

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Surrounding factor, because we need to know what kind motor that suitable with the surrounding. Some material in motor not suitable like plastic casing in motor will damage if in heat situation. Torque also the main point because certain machine need motor that required high power for operation machine beside that, power supply also important because  high torgue required high power supply . tq

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Environment condition. we must concern the surrounding temperature and air pressure whether which motor is suitable to use.

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FACTOR:NOISES
I think all motors make some noise due to the moving parts, but for some applications that are in public spaces or hospital settings, it is important to have a motor that operates as quietly as possible.

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In my opinion, i think the first thing we need to concern is the motor efficiency. High efficiency means motor able to accomplish more work per unit electricity. This indicates that less waste heat output produced.

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Budget is one the important factor need to be taken into when selecting a motor. If we use a small amount of money to buy a high-end motor servo, this is not a right choice.  Each design is unique and value of a motor is important to determine our budget.

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In my opinion  the battery capacity should be  calculated using a simulator to go through a reference cycle typical of the usage of the vehicle. Thus,  the simulator can output the consumption of the vehicle in kWh/km. From that value, the capacity of the battery can be calculated by multiplying it with the desired range.

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I think one of the most important factor of selecting motor is the electric voltage supply. There will be an abnormal system condition due to voltage effect such as under voltage, overvoltage and voltage surges.Continuous operation with under voltage condition increases the current, thus increasing the rated copper loss. This results into heating and prolonged temperature rise, and finally the burning of winding. The efficiency of motor will be reduced due to overvoltage or under voltage.

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Environment condition. We need to consider what kind of the environment factors will the motor be exposed to. Some of the motor need increased protection from water and dust. Some of the application have special requirements such as stainless steel in food industry or need preventative measures taken against corrosive materials.

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Heat

Heat is a concern when it comes to operating motors. They often have a specific temperature range at which they should be run. Motors produce heat when running, therefore fully-enclosed areas with no air circulation may cause motors to overheat.Certain motors will only draw the amount of current needed to perform a move or hold position. These motors tend to run cooler as they are not constantly drawing large amounts of current.

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First of all, we need to choose a motor that suitable for the equipment used. For example, the motor used must be produce sufficient power to run the equipment. Besides, speed of the motor also is one of the important factors to take in account, and normally motor run most efficiently at the highest speed of motor.

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I think one of the important factors for selecting motor is torque and inertia. We need to consider whether the selected motor provide enough torque to move your load or not. As we know, coupling the motor with a gearbox will help to achieve torque. Besides, we need to consider the weight of the mass they are moving and whether the motor can handle the acceleration and deceleration without over-driving the motor.

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Motor efficiency.
Efficiency will be one of the factors in the motor selection to maximize the battery life, if the application is battery powered. Like varying the percentage for efficiency to determine the effect on the list of motor recommendations.

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I think one of the important factors for selecting motor is constant speed and maximum speed of the motor. In general rule, motors run most efficiency at highest speeds but it is not always possible if gearing is required. The present of gears causes the efficiency of motor reduced.

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Characteristics of the motor. The properties of the motor such as size , weight , overload and aerodynamics are crucial characteristics that will determine speed, torque and power requirements of the electric motor.  We need choose a suitable motor in our application based on these aspects. So that we can understand the effects of the operating conditions and are essential to selection of the motor.

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lifespan of the motor
-higher.lifespan such as brushless dc mototr can save maintenance requirement

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Is power .Since the higher the power, the higher the torque and the angular velocity .

The higher the power ,so the  machine can be operated at higher efficiency and can make the operation can be done quickly .This can increase company profit and economic of our country .

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I think one of the important factors for selecting motor is ..............