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    DESIGN OF BLDC MOTOR FOR

    AEROSPACE APPLICATIONS

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    ABSTRACT

    In the field of aerospace the use of electricmotors for various applications is increasing day by day.Earlier, brushed DC motors were restricted due to theirinherent drawbacks. With the advant of high powermagnets and application of technologies of powerelectronics the use of brushless dc motor is increasing dayby day.

    The brushed dc motors are having disadvantages ofsparking,wear and tear of brushes and commutator and low

    reliability.In BLDC motor in place of brushes and mechanical

    commutator an electronic commutator is used.

    The proposed project aims at designing a BLDCmotor for given specifications with detailed analysis of

    desi n e uations, materials, rocessors, testin etc.

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    BLDC MOTOR

    Introduction: A brushless DC (BLDC) motor is a rotating electric

    machine where the stator is a classic three-phase stator

    like that of an induction motor and the rotor hassurface-mounted permanent magnets

    It is an electronically controlled commutation system,instead of a mechanical commutation system (i.e.brushes)

    The commutation function may be performed byvarious shaft position sensors . Small inexpensivemotors use Hall effect sensors. A Hall effect sensor is asemiconductor device .

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    COMPARISON BETWEEN BLDC AND BDC MOTOR

    Features BLDC motors Brushed DCmotor

    commutation Electroniccommutation basedon hall positionsensors.

    Brushedcommutation.

    Maintenance Less required due toabsence of brushes.

    Periodicmaintenance isrequired.

    Life Longer. Shorter.

    Efficiency High-no voltage dropacross brushes.

    Moderate.

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    Different parts used in BLDC motor

    STATOR

    ROTORBEARINGSMAGNETSHALL SENSORS

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    BRUSHLESS DC MOTOR

    STATOR

    MAGNETS

    ROTOR

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    POSITION OF SENSOR

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    Need For BLDC motorLonger operating life

    Light weightLow heat dissipationHigh efficiency

    High torqueLess power loss

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    Criteria for selection of

    materials

    Size (depends on properties ofmaterial)

    Cost

    AvailabilityMachinability

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    APPLICATIONS OF BLDC MOTORAppliancesAutomotiveAerospaceConsumerMedical

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    Advantages of BLDC MotorsNo use brushes for commutationNoiseless operation

    Higher efficiencyHigh torqueDouble the output torque over BDC

    motor of the same size

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    Disadvantages of BLDC Motors

    Higher electronic cost

    High initial costRequires controllerGreater motor drive complexity

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    CONCLUSION

    In this project we are designing a BLDC motor,in which we are using an electronic device for

    commutation. In this we are discussing about the partsof BLDC motor, its advantages, disadvantages and itsapplications.

    In this project we are designing a BLDC motorwhich is used for aerospace applications.

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    THANK YOU