Pub Date : 2022-01-01DOI: 10.1109/intermag39746.2022.9827842
Dongxu Liu, Weiwei Geng, Qiang Li, Jian Guo, Caiquan Wu, S. Ge
This paper presents a detailed analysis of the electromagnetic force and vibration behavior of segmented skew rotor for built-in U-shaped permanent magnet motor. First, the configuration of U-shape permanent magnet motor is introduced and designed. Subsequently, the effect of segmented skew rotor on output torque and torque ripple is investigated. By comparing the results, the optimum angle between different rotor sections is determined. Furthermore, this paper compares the electromagnetic performances of the motor with segmented skew rotor and the normal rotor. It proves that the motor with the segmented skew rotor can reduce the torque pulsation, make the back-EMF more sinusoidal, improve the magnetic weakening ability and reduce vibration. Comparing with the motor with normal rotor, the output torque fluctuation of the motor with segmented skew rotor is reduced from 42 N•m to 7 N m. Meanwhile, the fluctuation of cogging torque is reduced from 55 N m to 3 N m and the noise is reduced by 18dB. Finally, the test is carried out to validate the theoretical analysis, and the experimental results agree with the simulation results. This paper proves optimizing the number of rotor segments and angle between rotor segments have an important effect on electromagnetic characteristics of built-in permanent magnet motor. It can reduce torque ripple, vibration and noise of motor. It provides an idea to optimize the electromagnetic characteristics of the motor and reduce the vibration and noise of the motor.
{"title":"Electromagnetic Analysis and Vibration Reducing of Segmented Skew Rotor for Built-in U-shaped Permanent Magnet Motor","authors":"Dongxu Liu, Weiwei Geng, Qiang Li, Jian Guo, Caiquan Wu, S. Ge","doi":"10.1109/intermag39746.2022.9827842","DOIUrl":"https://doi.org/10.1109/intermag39746.2022.9827842","url":null,"abstract":"This paper presents a detailed analysis of the electromagnetic force and vibration behavior of segmented skew rotor for built-in U-shaped permanent magnet motor. First, the configuration of U-shape permanent magnet motor is introduced and designed. Subsequently, the effect of segmented skew rotor on output torque and torque ripple is investigated. By comparing the results, the optimum angle between different rotor sections is determined. Furthermore, this paper compares the electromagnetic performances of the motor with segmented skew rotor and the normal rotor. It proves that the motor with the segmented skew rotor can reduce the torque pulsation, make the back-EMF more sinusoidal, improve the magnetic weakening ability and reduce vibration. Comparing with the motor with normal rotor, the output torque fluctuation of the motor with segmented skew rotor is reduced from 42 N•m to 7 N m. Meanwhile, the fluctuation of cogging torque is reduced from 55 N m to 3 N m and the noise is reduced by 18dB. Finally, the test is carried out to validate the theoretical analysis, and the experimental results agree with the simulation results. This paper proves optimizing the number of rotor segments and angle between rotor segments have an important effect on electromagnetic characteristics of built-in permanent magnet motor. It can reduce torque ripple, vibration and noise of motor. It provides an idea to optimize the electromagnetic characteristics of the motor and reduce the vibration and noise of the motor.","PeriodicalId":135715,"journal":{"name":"2022 Joint MMM-Intermag Conference (INTERMAG)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125063742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1109/intermag39746.2022.9827867
T. M. Abdo, A. Adly
There is no doubt that the share of electric vehicles in international auto markets has experienced a consistent rise. So far, permanent magnet hub motors have emerged as the most widely used choice due to their high efficiency and power density capabilities. Nevertheless, cost of permanent magnets has been increasing, the fact that could compromise universal feasibility. Moreover, possible degradation of permanent magnet remnant magnetization over the years could also diminish lifetime of the aforementioned motors. This paper revisits the possibility of utilizing outer solid rotor induction motors for electric vehicle applications as an alternative. Among their advantages are the ease of manufacture and the relative low cost. Analysis and simulations are performed on a sample outer solid rotor induction motor and performance as well as power density are compared to a typical permanent magnet hub motor. More details are given in the paper.
{"title":"The Outer Solid Rotor Induction Motor as an Alternative for Electric Vehicle Traction Applications","authors":"T. M. Abdo, A. Adly","doi":"10.1109/intermag39746.2022.9827867","DOIUrl":"https://doi.org/10.1109/intermag39746.2022.9827867","url":null,"abstract":"There is no doubt that the share of electric vehicles in international auto markets has experienced a consistent rise. So far, permanent magnet hub motors have emerged as the most widely used choice due to their high efficiency and power density capabilities. Nevertheless, cost of permanent magnets has been increasing, the fact that could compromise universal feasibility. Moreover, possible degradation of permanent magnet remnant magnetization over the years could also diminish lifetime of the aforementioned motors. This paper revisits the possibility of utilizing outer solid rotor induction motors for electric vehicle applications as an alternative. Among their advantages are the ease of manufacture and the relative low cost. Analysis and simulations are performed on a sample outer solid rotor induction motor and performance as well as power density are compared to a typical permanent magnet hub motor. More details are given in the paper.","PeriodicalId":135715,"journal":{"name":"2022 Joint MMM-Intermag Conference (INTERMAG)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127793890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1109/intermag39746.2022.9827848
Zichen Jin, Xiaofeng Zhu, Shaoxian Chen, Z. Li, S. Ding
In this paper, to apply the advantages of hybrid excited (HE) machine to flux switching permanent magnet machine with multi-tooth stator structure (MFSPM), three novel hybrid excited multitooth flux switching permanent magnet (HE-MFSPM) machines are proposed. The three topologies are basically the same except that PM with radial magnetization is added in each dummy slot in Model II, while a fault tolerant tooth is employed and wound with field winding in Model III. In order to have better flux regulation and lower demagnetization risk, parallel-hybrid-excited structure is adopted in all of the three machines. Then, to evaluate the electromagnetic performance and flux regulation capability of the three HE-MFSPM machines, a series of comparisons, such as flux linkage, back electromotive force (back-EMF), cogging torque, electromagnetic torque, torque ripple, overload capability and flux weakening capability, are conducted by finite element analysis (FEA). The predicted results show that all the proposed three HE-MFSPM machines exhibit good ability of flux regulation due to the addition of field windings. But Model III is superior to Model I and Model II since it exhibits most effective flux regulation capability, highest average torque on rated current density, best overload capability and widest speed range. Moreover, fault-tolerant ability and modularity exist in Model III because of the existence of fault-tolerant teeth.
{"title":"Comparative Study on Three Novel Hybrid Excited Multitooth Flux-switching Permanent Magnet Machines","authors":"Zichen Jin, Xiaofeng Zhu, Shaoxian Chen, Z. Li, S. Ding","doi":"10.1109/intermag39746.2022.9827848","DOIUrl":"https://doi.org/10.1109/intermag39746.2022.9827848","url":null,"abstract":"In this paper, to apply the advantages of hybrid excited (HE) machine to flux switching permanent magnet machine with multi-tooth stator structure (MFSPM), three novel hybrid excited multitooth flux switching permanent magnet (HE-MFSPM) machines are proposed. The three topologies are basically the same except that PM with radial magnetization is added in each dummy slot in Model II, while a fault tolerant tooth is employed and wound with field winding in Model III. In order to have better flux regulation and lower demagnetization risk, parallel-hybrid-excited structure is adopted in all of the three machines. Then, to evaluate the electromagnetic performance and flux regulation capability of the three HE-MFSPM machines, a series of comparisons, such as flux linkage, back electromotive force (back-EMF), cogging torque, electromagnetic torque, torque ripple, overload capability and flux weakening capability, are conducted by finite element analysis (FEA). The predicted results show that all the proposed three HE-MFSPM machines exhibit good ability of flux regulation due to the addition of field windings. But Model III is superior to Model I and Model II since it exhibits most effective flux regulation capability, highest average torque on rated current density, best overload capability and widest speed range. Moreover, fault-tolerant ability and modularity exist in Model III because of the existence of fault-tolerant teeth.","PeriodicalId":135715,"journal":{"name":"2022 Joint MMM-Intermag Conference (INTERMAG)","volume":"352 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122766072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1109/intermag39746.2022.9827796
M. Mirzaei, P. Ripka, V. Grim
A novel eddy current sensor is proposed in this paper for conductivity measurement of nonmagnetic metals. It has one excitation coil and two antiserially pick up coils. The three coils have rectangular forms with the equilateral triangular arrangement. The induced voltage of antiserially connected pick up coils is zero when all coils are far enough from conductive objects. However, the induced voltage is nonzero when one pick up coil is close to the conductive object due to the induced eddy currents in the conductive objects and unequal flux linkage in the pick up coils. The real and imaginary components of the induced voltage and their ratio are functions of plate conductivity. The experiments and 3D finite element method analysis of the triple coils sensor are conducted for conductivity measurement of nonferrous plates to estimate their conductivities. The accuracy of the eddy current sensor was tested and analyzed, showing that its error can be as low as 0.2%. Conductivity measurement is also presented using measured impedance change of single rectangular coil parallel to conductive plates with minimum accuracy error 0.4% and the results of conductivity estimation are compared with triple coils sensor.
{"title":"Conductivity Measurement of Nonferrous Plates using A Novel Sensor with Triangular Arrangements of Triple Coils","authors":"M. Mirzaei, P. Ripka, V. Grim","doi":"10.1109/intermag39746.2022.9827796","DOIUrl":"https://doi.org/10.1109/intermag39746.2022.9827796","url":null,"abstract":"A novel eddy current sensor is proposed in this paper for conductivity measurement of nonmagnetic metals. It has one excitation coil and two antiserially pick up coils. The three coils have rectangular forms with the equilateral triangular arrangement. The induced voltage of antiserially connected pick up coils is zero when all coils are far enough from conductive objects. However, the induced voltage is nonzero when one pick up coil is close to the conductive object due to the induced eddy currents in the conductive objects and unequal flux linkage in the pick up coils. The real and imaginary components of the induced voltage and their ratio are functions of plate conductivity. The experiments and 3D finite element method analysis of the triple coils sensor are conducted for conductivity measurement of nonferrous plates to estimate their conductivities. The accuracy of the eddy current sensor was tested and analyzed, showing that its error can be as low as 0.2%. Conductivity measurement is also presented using measured impedance change of single rectangular coil parallel to conductive plates with minimum accuracy error 0.4% and the results of conductivity estimation are compared with triple coils sensor.","PeriodicalId":135715,"journal":{"name":"2022 Joint MMM-Intermag Conference (INTERMAG)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125861355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1109/intermag39746.2022.9827828
Heng Zhu, Haitao Wang, S. Ding, Chao He, Z. Li, Shaoxian Chen
The paper proposes a new staggered dual stator field modulation machine with O-shape permanent magnet (PM) excitation (OPM-SDSFMM), which can provide high quality torque production. The O-shape PM excitation in rotor is composed of two radially magnetized PMs and two tangentially magnetized PMs, which offers high sinusoidal air-gap magnetic field with high flux density. The inner stator is rotated along shaft to a position that the angle between central lines of teeth of the inner and outer stators is 15 degrees to form staggered dual stator structure, which can reduce the flux leakage and increase output torque production effectively. To verify the advantages of the proposed OPM-SDSFMM, two designed machines with bilateral PM excitation and with aligned dual stator structure, respectively, are presented and analyzed. The topology, operating principle and key design parameters of proposed OPM-SDSFMM are clarified. The electromagnetic performances, such as back electromotive force (back-EMF) and torque characteristics, are calculated using finite-element analysis (FEA). The FEA-predicted results show that the proposed OPM-SDSFMM is a desirable choice for direct-drive applications because of high back-EMF amplitude and high torque production with low torque ripple.
{"title":"A New Staggered Dual Stator Field Modulation Machine with O-Shape Permanent Magnet Excitation","authors":"Heng Zhu, Haitao Wang, S. Ding, Chao He, Z. Li, Shaoxian Chen","doi":"10.1109/intermag39746.2022.9827828","DOIUrl":"https://doi.org/10.1109/intermag39746.2022.9827828","url":null,"abstract":"The paper proposes a new staggered dual stator field modulation machine with O-shape permanent magnet (PM) excitation (OPM-SDSFMM), which can provide high quality torque production. The O-shape PM excitation in rotor is composed of two radially magnetized PMs and two tangentially magnetized PMs, which offers high sinusoidal air-gap magnetic field with high flux density. The inner stator is rotated along shaft to a position that the angle between central lines of teeth of the inner and outer stators is 15 degrees to form staggered dual stator structure, which can reduce the flux leakage and increase output torque production effectively. To verify the advantages of the proposed OPM-SDSFMM, two designed machines with bilateral PM excitation and with aligned dual stator structure, respectively, are presented and analyzed. The topology, operating principle and key design parameters of proposed OPM-SDSFMM are clarified. The electromagnetic performances, such as back electromotive force (back-EMF) and torque characteristics, are calculated using finite-element analysis (FEA). The FEA-predicted results show that the proposed OPM-SDSFMM is a desirable choice for direct-drive applications because of high back-EMF amplitude and high torque production with low torque ripple.","PeriodicalId":135715,"journal":{"name":"2022 Joint MMM-Intermag Conference (INTERMAG)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121666172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1109/intermag39746.2022.9827707
A. Sherwali, W. Dunford
The system studied here uses an array of parallel-connected, voltage-driven coils distributed along the solenoid core to control the magnetic flux. The ends of the core are extended, and thus take the form of magnetic poles driving magnetic flux through the air return path. When these poles are spherical and infinitely permeable an analytical expression can be obtained for the effective end return reluctance. This paper considers a more practical example and shows the reluctance of cylindrical core ends with a known permeability, and validates the results through measurements. It goes further to show how the linear current density of each coil depends on the position of the coil on the core and the core material.
{"title":"Reluctance of Long Solenoids with Extended Core","authors":"A. Sherwali, W. Dunford","doi":"10.1109/intermag39746.2022.9827707","DOIUrl":"https://doi.org/10.1109/intermag39746.2022.9827707","url":null,"abstract":"The system studied here uses an array of parallel-connected, voltage-driven coils distributed along the solenoid core to control the magnetic flux. The ends of the core are extended, and thus take the form of magnetic poles driving magnetic flux through the air return path. When these poles are spherical and infinitely permeable an analytical expression can be obtained for the effective end return reluctance. This paper considers a more practical example and shows the reluctance of cylindrical core ends with a known permeability, and validates the results through measurements. It goes further to show how the linear current density of each coil depends on the position of the coil on the core and the core material.","PeriodicalId":135715,"journal":{"name":"2022 Joint MMM-Intermag Conference (INTERMAG)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129612353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1109/intermag39746.2022.9827858
W. Quan, V. Koomson, M. Afsar
In this work, we present the design, simulation, fabrication and measured results of a self-bias micro-strip line Barium hexagonal Nano-ferrite (BaM) circulator on silicon wafer. This planar Y-junction circulator is 2 mm by 2 mm by 0.5 mm in size, which is capable of future integration with the top three layers of 180 nm CMOS technology. Ferrite thin film is deposited and patterned employing composite spin-casting method. Typical characterization techniques are employed together with free-space quasi-optical spectrometry to study complex permittivity and permeability of deposited film up to 120 GHz. S parameters of fabricated circulators are characterized by a set of on wafer probes up to 67 GHz. We observed over 15 dB non-reciprocal phenomenon at 55 GHz.
{"title":"Hexagonal Nano-ferrites used on a V-band Self-bias On-chip Circulator for CMOS","authors":"W. Quan, V. Koomson, M. Afsar","doi":"10.1109/intermag39746.2022.9827858","DOIUrl":"https://doi.org/10.1109/intermag39746.2022.9827858","url":null,"abstract":"In this work, we present the design, simulation, fabrication and measured results of a self-bias micro-strip line Barium hexagonal Nano-ferrite (BaM) circulator on silicon wafer. This planar Y-junction circulator is 2 mm by 2 mm by 0.5 mm in size, which is capable of future integration with the top three layers of 180 nm CMOS technology. Ferrite thin film is deposited and patterned employing composite spin-casting method. Typical characterization techniques are employed together with free-space quasi-optical spectrometry to study complex permittivity and permeability of deposited film up to 120 GHz. S parameters of fabricated circulators are characterized by a set of on wafer probes up to 67 GHz. We observed over 15 dB non-reciprocal phenomenon at 55 GHz.","PeriodicalId":135715,"journal":{"name":"2022 Joint MMM-Intermag Conference (INTERMAG)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128126310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1109/intermag39746.2022.9827812
Tao Wang, L. Jing
When the coaxial modulated magnetic(CMG) gear is overloaded, the temperature rise of the permanent magnets(PMs) will be aggravated, which leads to a larger loss. To improve the harmonics in the air gap and reduce the losses during overload, a new type magnetic gear model is come up with in this paper. The PMs on the inner rotor adopted Halbach Arrays. Outer rotor yoke and outer PMs slotted and add a copper bar. The magnetic field of CMG under overload is studied and the reason of the demagnetization of PMs on the rotor is discussed. The finite element analysis(FEA) is used to compare air gap magnetic density, output torque, and loss of two models. The proposed magnetic gear not only improves the air gap magnetic density and weakens the unworked harmonics, but also increases the output torque, reduces the eddy current loss and the iron loss.
{"title":"Analysis of Electromagnetic Characteristics of Magnetic Gear with Halbach Arrays and Copper Bar","authors":"Tao Wang, L. Jing","doi":"10.1109/intermag39746.2022.9827812","DOIUrl":"https://doi.org/10.1109/intermag39746.2022.9827812","url":null,"abstract":"When the coaxial modulated magnetic(CMG) gear is overloaded, the temperature rise of the permanent magnets(PMs) will be aggravated, which leads to a larger loss. To improve the harmonics in the air gap and reduce the losses during overload, a new type magnetic gear model is come up with in this paper. The PMs on the inner rotor adopted Halbach Arrays. Outer rotor yoke and outer PMs slotted and add a copper bar. The magnetic field of CMG under overload is studied and the reason of the demagnetization of PMs on the rotor is discussed. The finite element analysis(FEA) is used to compare air gap magnetic density, output torque, and loss of two models. The proposed magnetic gear not only improves the air gap magnetic density and weakens the unworked harmonics, but also increases the output torque, reduces the eddy current loss and the iron loss.","PeriodicalId":135715,"journal":{"name":"2022 Joint MMM-Intermag Conference (INTERMAG)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132361268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-01-01DOI: 10.1109/intermag39746.2022.9827870
Weiwei Geng, Ting Zhu, Yu Wang, Lei Li, Jianhua Guo
This paper aims to provide a simple design for a better contact between the heat source and cooling equipment. The auxiliary teeth are introduced for a better heat dissipation. Although the auxiliary teeth provide an extra heat path, the electromagnetic performance will be jeopardized in terms of lower output torque and higher loss. In this paper, the width of the auxiliary teeth is expanded and the same width of the stator teeth is reduced to ensure that the slot full rate remains unchanged. The comprehensive influence of this structural change on the electromagnetic and thermal performance of the motor is studied. Furthermore, three representative cases are selected for detailed comparison. Finally, the law of auxiliary teeth on electromagnetic performance and motor temperature rise is given. The predicted results reveal that the proposed method provides a new solution for the thermal design of concentrated winding permanent magnet motor.
{"title":"Electromagnetic-Thermal Coupling Optimization of Concentrated Winding PM Motor with Auxiliary Teeth for Electric Vehicle","authors":"Weiwei Geng, Ting Zhu, Yu Wang, Lei Li, Jianhua Guo","doi":"10.1109/intermag39746.2022.9827870","DOIUrl":"https://doi.org/10.1109/intermag39746.2022.9827870","url":null,"abstract":"This paper aims to provide a simple design for a better contact between the heat source and cooling equipment. The auxiliary teeth are introduced for a better heat dissipation. Although the auxiliary teeth provide an extra heat path, the electromagnetic performance will be jeopardized in terms of lower output torque and higher loss. In this paper, the width of the auxiliary teeth is expanded and the same width of the stator teeth is reduced to ensure that the slot full rate remains unchanged. The comprehensive influence of this structural change on the electromagnetic and thermal performance of the motor is studied. Furthermore, three representative cases are selected for detailed comparison. Finally, the law of auxiliary teeth on electromagnetic performance and motor temperature rise is given. The predicted results reveal that the proposed method provides a new solution for the thermal design of concentrated winding permanent magnet motor.","PeriodicalId":135715,"journal":{"name":"2022 Joint MMM-Intermag Conference (INTERMAG)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130974930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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