Abstract
PMSM and AFPM are two different types of permanent magnet motors that convert electrical energy into mechanical energy and are used in many industrial applications. These motors are ahead of other motor types, especially in terms of energy efficiency and power density. In unmanned aerial vehicles, it is a great advantage to use a low weight and low volume propulsion provider. Moreover, the low level of acoustic noise is important for UAVs. In this paper, a new coreless AFPM (C-AFPM) was designed, and the prototype was carried out to achieve low acoustic noise. The acoustic performance of six-step and FOC commutation techniques was observed. As a result, it has been seen that an AFPM driven with the FOC control technique emits around 30% lower acoustic noise than the scenario driven by the six-step technique with the new C-AFPM machine for UAVs.
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Abbreviations
- \({\varnothing }_{\delta }\) :
-
Magnet flux crossing air gap in Weber
- \({T}_{cog}\) :
-
Cogging torque in Newton-meter
- \(R\) :
-
Total reluctance through flux passes (1)
- \({\vartheta }_{r}\) :
-
Mechanical position of the rotor
- \({T}_{ksin}\) :
-
Amplitude of k-th harmonic for sine part
- \({T}_{kcos}\) :
-
Amplitude of k-th harmonic for cosine part
- \(LCM\) :
-
Least common multiple of number of slots Q and number of poles 2p
- \({\text{T}}\) :
-
Electromagnetic torque in Newton-meter
- \({\text{J}}\) :
-
Moment of inertia in Kg.m2
- \({T}_{l}\) :
-
Load torque
- \(B\) :
-
Coefficient of friction Kg/ms
- BEMF:
-
Back electromotive force
- \(V\) :
-
DC voltage in Volts
- \(L\) :
-
Inductance of windings in Henry
- \(R\) :
-
Resistance of the windings in Ohms
- \(E\) :
-
Back EMF of the motor
- \(i\) :
-
Current in Ampere
- \({V}_{a},{V}_{b},{V}_{c}\) :
-
Phase voltage for a, b, c phases in Volts
- \({i}_{a},{i}_{b},{i}_{c}\) :
-
Motor input current for a, b, c phases in Ampere
- \({e}_{a},{e}_{b},{e}_{c}\) :
-
Motor back EMF voltage for a, b, c phases in Volts
- RPM:
-
Revolutions per minute
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Acknowledgements
This work supported by Electric, Unmanned and Autonomous Vehicles Research & Application Center (AUTONOM), Altinbas University, Türkiye.
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In this study, FK made an effort in the implementation of simulation and experimental studies and in writing the body part of the article. EA made an effort in the technical review of the article and in writing the introduction part.
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Kurtulus, F., Akboy, E. A comparasion of the effects of different commutation techniques on acoustic noise in AFPM UAV motors. Electr Eng (2024). https://doi.org/10.1007/s00202-024-02358-z
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DOI: https://doi.org/10.1007/s00202-024-02358-z