EPE Association: EPE 2017 - DS2g: Electrical Machines and Drive Issues II

EPE 2017 - DS2g: Electrical Machines and Drive Issues II
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 04: Electrical Machines and Drive Systems > EPE 2017 - DS2g: Electrical Machines and Drive Issues II

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   Comparing IPM and SMPM as a WEC Generator from a LCC Perspective
By Pinar TOKAT [View]
[Download]

Abstract: A v-shaped interior permanent magnet (IPM) and a surface mounted permanent magnet (SMPM) machines withthe same dimensions and magnet volume are used as a WEC generator and are evaluated using the Life CycleCost (LCC) method. The most optimal design from the economical perspective is determined to be the SMPM.

   Comparison of Permanent Magnet Synchronous Machines with Concentrated Windings and Different Rotor Configurations
By Aitor TOVAR-BARRANCO [View]
[Download]

Abstract: Electric motors for traction applications are traditionally designed with internal rotors. However, torque density can be increased with the rotor in the outside. Two permanent magnet synchronous machines (PMSM) with fractional slot concentrated windings (FSCW) and internal and external rotors, designed with same electromagnetic properties and volume restrictions, are compared to prove which one gives the best performance. The external rotor machine increases the torque density by 24.9\% at the expense of higher torque ripple.

   Design and test of an internal permanent magnet generator for small wind turbine applications
By Mateusz DYBKOWSKI [View]
[Download]

Abstract: In the paper the design of an IPMSG for small windturbines is presented. Based on classical construction of inductionmotor (IM), the internal permanent magnet generator (IPMG)was projected. Parameterization and sweep analysis of the rotorgeometry was done in the finite element analysis (FEA) software,to obtain the maximum back electromotive force (BEMF). Basedon this analysis, one case was chosen and manufactured.Simulations and experimental results are compared and discussed

   Influence of Iron Loss Properties of Magnetic Steel Sheets and Rotor Structure on Efficiency of IPMSMs
By Mio KASHIMURA [View]
[Download]

Abstract: Interior permanent magnet synchronous motors (IPMSMs) are used in various applications. Because of concerns about environmental problems such as global warming, IPMSMs are investigated to improve the efficiency to save energy. Magnetic steel sheets are commonly used in IPMSMs, and the use of low-iron-loss materials in IPMSMs to improve their performance has recently been examined. In this study, the influence of the iron loss properties of magnetic steel sheets on the loss properties of IPMSMs was investigated. Two different magnetic steel sheets were used in IPMSMs with two different rotor structures. The performance of these models was compared analytically and experimentally. The results indicate that if low-iron-loss materials are used in IPMSMs, the efficiency of the rotor with a large reluctance torque is likely to be high.

   Investigation and Reduction of Losses on Inverter-fed Induction Motors
By Khang HUYNH [View]
[Download]

Abstract: An electric motor is more effective and flexible when supplied by a frequency converter. The frequency converter not only produces the fundamental voltage but also a set of higher harmonics which cause additional losses in the motor. Losses in the frequency converter are normally neglected in the drive dimensioning due to insufficient data available from manufacturers. Motor's losses can be reduced by increasing the switching frequency of frequency converters. An increase of the switching frequency may result in higher losses in the frequency converter. This work investigates analytically and experimentally the dependence of the losses of modern motor and frequency converter on a switching frequency and determines the switching frequency range which minimizes the total loss of inverter-fed motors. It was found during the experimental testing that the losses of a frequency converter are close to the motor losses at rated operating conditions and they become dominant when operating at lower speed and power although the converter and motor were dimensioned for the same rate power rating.

   LOAD-CARRYING CAPACITY OF INDUCTION MACHINE SUPPLIED WITH VOLTAGE CONTAINING SUBHARMONICS
By Piotr GNACINSKI [View]
[Download]

Abstract: This paper is devoted to load-carrying capacity of an induction machine under voltage containing subharmonic injection. The permissible machine load is investigated for various frequencies of voltage subharmonics. The results of calculations are presented for a totally-enclosed induction cage machine of rated power 5.5 kW

   Monitoring of Current Technical Condition of a Vessel Diesel-Generator Installation
By ANASTASIA ZHIRAVETSKA [View]
[Download]

Abstract: The authors of this paper suggest a mathematical model of a vessel diesel-generator installation meeting in larger extent the specific properties of such system and its application. A distinctive feature of the method under consideration is the use of the synchronous generator itself as a precise multifunctional sensor of the diagnostic information. The paper is also presenting the results of practical measurements of the system. The represented paper is suggesting the results of a long-term monitoring of a vessel diesel-generator. The synchronous generator of the system is used as a precise multifunctional sensor of the diagnostic information that is a special feature of the method. The specific point of this approach is the application of the results of spectral analysis of the output current and voltage of the synchronous generator. The paper contains the presentation of the results of practical measurements.

   PRELIMINARY INVESTIGATIONS OF INDUCTION MACHINE SUPPLIED WITH VOLTAGE CONTAINING INTERHARMONICS USING FIELD MODEL
By Piotr GNACINSKI [View]
[Download]

Abstract: This works deals with preliminary investigations of an induction machine supplied with voltagecontaining interharmonics using finite element method. The results of computations in ANSYSMaxwell environment were compared with results of measurements. The investigations wereperformed for a machine of rated power 3 kW for various interharmonic frequencies.

   Principle Verification of Magnetization Reversal Motor
By Tatsuki MURAKAMI [View]
[Download]

Abstract: This paper experimentally confirms the operation of a new concept of magnetization reversal motor. The motor uses conventional PM rotor, however, the stator is consist of thesmall coercive force magnet for the stator teeth and the winding which magnetizes and demagnetizes the teeth of the proposed includes the permanent magnets which has small coercive force magnet. The magnets in the stator areis magnetized by the pulse current injected at stator coil. Therefore, the stator can generate alternating magnetic field by the pulse current, and the motor is can produce the output torque by the alternating magnetic field. This paper experimentally verified its principle by using actual machine.

   Vibration analysis of SRM designed for motoring and generating operations with spread spectrum current control
By Adam BIERNAT [View]
[Download]

Abstract: Vibrations of high speed SRM design focused on possible highest efficiency and low torque ripples both in motoring and generating mode of operation are investigated. The main constructional nodes that are source of vibrations are identified based on comparison of time sequences of motor frame displacement acceleration with total and phase motor current. Vibration analysis is the second stage of design process that suggest possible additional changes in stator and rotor geometry and controller operation that minimizes detrimental vibro-acoustic phenomenon.

   Vibration and Acoustic Noise Reduction of Switched Reluctance Motor with Back ElectroMotive Force Control
By Yosuke MURAKAMI [View]
[Download]

Abstract: This paper proposes, as a control scheme of a switched reluctance motor, back electromotive force control(back-EMF control for the abbreviation) in order to reduce the vibration and the acoustic noise of aswitched reluctance motor. In back-EMF control, the winding current is kept around the current reference without switching the power devices in a corresponding phase in the drive circuit by utilizing back electromotive force arisen in the stator windings. In this paper, the experiments were conducted to verify the effectiveness of the proposed control. The experimental results in a 2 kW three-phase 12-8 poles switched reluctance motor show that the proposed back-EMF control scheme reduces the vibration and the acoustic noise while the efficiency increases compared with current hysteresis control (conventional control). From the experimental results, it is revealed that the proposed control scheme can suppress effectively the fundamental frequency component and its harmonic components of the acoustic noise compared with the conventional control.

   Voltage Command Derivation for PWM Controller to Reduce Torque Ripple in Switched Reluctance Motor
By Abe TOMOYA [View]
[Download]

Abstract: The output torque of switched reluctance motor (SRM) can be controlled by flowing an appropriate current through the armature windings. In general, current hysteresis control has been applied. However, there is a problem that acoustic noise generated from the SRM at the driving tends to become large. Then, there are reports that PWM control has been applied to suppress the acoustic noise. This paper proposes a method to obtain the voltage command used in PWM control in order to flow the desired current to the motor winding by use of electromagnetic field analysis software. In this paper, it is clarified by simulation and experiment that the torque ripple can be reduced by inputting an appropriate voltage command into the PWM controller. In addition, it is clarified that the proposed control method improves the efficiency and suppresses the acoustic noise.

EPE 2017 - DS2g: Electrical Machines and Drive Issues II
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2017 ECCE Europe - Conference > EPE 2017 - Topic 04: Electrical Machines and Drive Systems > EPE 2017 - DS2g: Electrical Machines and Drive Issues II
	[return to parent folder]

	Comparing IPM and SMPM as a WEC Generator from a LCC Perspective By Pinar TOKAT	[View] [Download]
Abstract: A v-shaped interior permanent magnet (IPM) and a surface mounted permanent magnet (SMPM) machines withthe same dimensions and magnet volume are used as a WEC generator and are evaluated using the Life CycleCost (LCC) method. The most optimal design from the economical perspective is determined to be the SMPM.

	Comparison of Permanent Magnet Synchronous Machines with Concentrated Windings and Different Rotor Configurations By Aitor TOVAR-BARRANCO	[View] [Download]
Abstract: Electric motors for traction applications are traditionally designed with internal rotors. However, torque density can be increased with the rotor in the outside. Two permanent magnet synchronous machines (PMSM) with fractional slot concentrated windings (FSCW) and internal and external rotors, designed with same electromagnetic properties and volume restrictions, are compared to prove which one gives the best performance. The external rotor machine increases the torque density by 24.9\% at the expense of higher torque ripple.

	Design and test of an internal permanent magnet generator for small wind turbine applications By Mateusz DYBKOWSKI	[View] [Download]
Abstract: In the paper the design of an IPMSG for small windturbines is presented. Based on classical construction of inductionmotor (IM), the internal permanent magnet generator (IPMG)was projected. Parameterization and sweep analysis of the rotorgeometry was done in the finite element analysis (FEA) software,to obtain the maximum back electromotive force (BEMF). Basedon this analysis, one case was chosen and manufactured.Simulations and experimental results are compared and discussed

	Influence of Iron Loss Properties of Magnetic Steel Sheets and Rotor Structure on Efficiency of IPMSMs By Mio KASHIMURA	[View] [Download]
Abstract: Interior permanent magnet synchronous motors (IPMSMs) are used in various applications. Because of concerns about environmental problems such as global warming, IPMSMs are investigated to improve the efficiency to save energy. Magnetic steel sheets are commonly used in IPMSMs, and the use of low-iron-loss materials in IPMSMs to improve their performance has recently been examined. In this study, the influence of the iron loss properties of magnetic steel sheets on the loss properties of IPMSMs was investigated. Two different magnetic steel sheets were used in IPMSMs with two different rotor structures. The performance of these models was compared analytically and experimentally. The results indicate that if low-iron-loss materials are used in IPMSMs, the efficiency of the rotor with a large reluctance torque is likely to be high.

	Investigation and Reduction of Losses on Inverter-fed Induction Motors By Khang HUYNH	[View] [Download]
Abstract: An electric motor is more effective and flexible when supplied by a frequency converter. The frequency converter not only produces the fundamental voltage but also a set of higher harmonics which cause additional losses in the motor. Losses in the frequency converter are normally neglected in the drive dimensioning due to insufficient data available from manufacturers. Motor's losses can be reduced by increasing the switching frequency of frequency converters. An increase of the switching frequency may result in higher losses in the frequency converter. This work investigates analytically and experimentally the dependence of the losses of modern motor and frequency converter on a switching frequency and determines the switching frequency range which minimizes the total loss of inverter-fed motors. It was found during the experimental testing that the losses of a frequency converter are close to the motor losses at rated operating conditions and they become dominant when operating at lower speed and power although the converter and motor were dimensioned for the same rate power rating.

	LOAD-CARRYING CAPACITY OF INDUCTION MACHINE SUPPLIED WITH VOLTAGE CONTAINING SUBHARMONICS By Piotr GNACINSKI	[View] [Download]
Abstract: This paper is devoted to load-carrying capacity of an induction machine under voltage containing subharmonic injection. The permissible machine load is investigated for various frequencies of voltage subharmonics. The results of calculations are presented for a totally-enclosed induction cage machine of rated power 5.5 kW

	Monitoring of Current Technical Condition of a Vessel Diesel-Generator Installation By ANASTASIA ZHIRAVETSKA	[View] [Download]
Abstract: The authors of this paper suggest a mathematical model of a vessel diesel-generator installation meeting in larger extent the specific properties of such system and its application. A distinctive feature of the method under consideration is the use of the synchronous generator itself as a precise multifunctional sensor of the diagnostic information. The paper is also presenting the results of practical measurements of the system. The represented paper is suggesting the results of a long-term monitoring of a vessel diesel-generator. The synchronous generator of the system is used as a precise multifunctional sensor of the diagnostic information that is a special feature of the method. The specific point of this approach is the application of the results of spectral analysis of the output current and voltage of the synchronous generator. The paper contains the presentation of the results of practical measurements.

	PRELIMINARY INVESTIGATIONS OF INDUCTION MACHINE SUPPLIED WITH VOLTAGE CONTAINING INTERHARMONICS USING FIELD MODEL By Piotr GNACINSKI	[View] [Download]
Abstract: This works deals with preliminary investigations of an induction machine supplied with voltagecontaining interharmonics using finite element method. The results of computations in ANSYSMaxwell environment were compared with results of measurements. The investigations wereperformed for a machine of rated power 3 kW for various interharmonic frequencies.

	Principle Verification of Magnetization Reversal Motor By Tatsuki MURAKAMI	[View] [Download]
Abstract: This paper experimentally confirms the operation of a new concept of magnetization reversal motor. The motor uses conventional PM rotor, however, the stator is consist of thesmall coercive force magnet for the stator teeth and the winding which magnetizes and demagnetizes the teeth of the proposed includes the permanent magnets which has small coercive force magnet. The magnets in the stator areis magnetized by the pulse current injected at stator coil. Therefore, the stator can generate alternating magnetic field by the pulse current, and the motor is can produce the output torque by the alternating magnetic field. This paper experimentally verified its principle by using actual machine.

	Vibration analysis of SRM designed for motoring and generating operations with spread spectrum current control By Adam BIERNAT	[View] [Download]
Abstract: Vibrations of high speed SRM design focused on possible highest efficiency and low torque ripples both in motoring and generating mode of operation are investigated. The main constructional nodes that are source of vibrations are identified based on comparison of time sequences of motor frame displacement acceleration with total and phase motor current. Vibration analysis is the second stage of design process that suggest possible additional changes in stator and rotor geometry and controller operation that minimizes detrimental vibro-acoustic phenomenon.

	Vibration and Acoustic Noise Reduction of Switched Reluctance Motor with Back ElectroMotive Force Control By Yosuke MURAKAMI	[View] [Download]
Abstract: This paper proposes, as a control scheme of a switched reluctance motor, back electromotive force control(back-EMF control for the abbreviation) in order to reduce the vibration and the acoustic noise of aswitched reluctance motor. In back-EMF control, the winding current is kept around the current reference without switching the power devices in a corresponding phase in the drive circuit by utilizing back electromotive force arisen in the stator windings. In this paper, the experiments were conducted to verify the effectiveness of the proposed control. The experimental results in a 2 kW three-phase 12-8 poles switched reluctance motor show that the proposed back-EMF control scheme reduces the vibration and the acoustic noise while the efficiency increases compared with current hysteresis control (conventional control). From the experimental results, it is revealed that the proposed control scheme can suppress effectively the fundamental frequency component and its harmonic components of the acoustic noise compared with the conventional control.

	Voltage Command Derivation for PWM Controller to Reduce Torque Ripple in Switched Reluctance Motor By Abe TOMOYA	[View] [Download]
Abstract: The output torque of switched reluctance motor (SRM) can be controlled by flowing an appropriate current through the armature windings. In general, current hysteresis control has been applied. However, there is a problem that acoustic noise generated from the SRM at the driving tends to become large. Then, there are reports that PWM control has been applied to suppress the acoustic noise. This paper proposes a method to obtain the voltage command used in PWM control in order to flow the desired current to the motor winding by use of electromagnetic field analysis software. In this paper, it is clarified by simulation and experiment that the torque ripple can be reduced by inputting an appropriate voltage command into the PWM controller. In addition, it is clarified that the proposed control method improves the efficiency and suppresses the acoustic noise.