EPE Association: EPE 1997 – 59: Dialogue Session DS5a: PERMANENT MAGNET MOTORS

EPE 1997 – 59: Dialogue Session DS5a: PERMANENT MAGNET MOTORS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 59: Dialogue Session DS5a: PERMANENT MAGNET MOTORS

   [return to parent folder]

   MODELLING AND SIMULATION OF AN AXIAL FIELD BRUSHLESS PERMANENT MAGNET MOTOR DRIVE
By Nesimi Ertugrul; Eric Chong [View]
[Download]

Abstract: A simulation model for the transient and the steady-state performance prediction of an axial field three-phase brushless permanent magnet (PM) motor drive is described. The simulation is accomplished by using Matlab/Simulink. Comparisons between experimental and simulation results are presented. The comparisons indicate that the method of drive simulation using Matlab/Simulink presented in this paper delivers accurate results for different operating conditions: steady-state and transient operations.

   THE ANALYTICAL AND EXPERIMENTAL STUDY ON TORQUE PERFORMANCE OF BRUSHLESS DC DRIVES IN HIGH SPEED OPERATION
By L. Tezduyar; K. Erenay; F. Sonmezoz [View]
[Download]

Abstract: This study is based on optimum phase-advance angle calculation by using a time stepping simulation technique to improve brushless DC motor torque perfonnance in voltage limit region. The solution corresponding to 120° and 180° conduction modes covers not only steady state but also dynamic behaviour of the drive system. Moreover, an analytical approach in time domain to find out optimum phase-advance angle is presented. l11e simulation and analytical results have been compared and the correlation between analytical and theoretical results have been assessed. Furthennore, experimental results are also proposed.

   ANALYTICAL CALCULATION OF WINDING LOSSES OF INVERTER-FED PM SYNCHRONOUS MOTORS WITH AIR-GAP WINDINGS AND SURFACE MOUNTED MAGNETS
By Jörgen Engström; Freddy Magnussen; Hans-Peter Nee [View]
[Download]

Abstract: This paper deals with winding losses in machines with surface-mounted magnets and air-gap windings. The paper includes a method of calculating the inductance, analytical expressions for both the losses caused by the rotating flux of the magnets and the extra losses due to the skin effect caused by the inverter harmonics. Assuming an inverter with sinusoidal PWM with known harmonic content, an example is calculated.

   PERFORMANCE MAXIMISATION OF THE D.C. BRUSHLESS MOTOR WITHOUT THE AID OF DIRECT CURRENT CONTROL
By M. Allan; C. Zhou [View]
[Download]

Abstract: To maximise the performance of a d.c. brushless motor the associated electronic commutator usually incorporates a current control loop designed to provide an optimum drive current waveform. An alternative approach is to employ commutation techniques that do not require the direct control of current. This eliminates the costs normally associated with current control and reduces some of the problems related to high frequency switching such as electromagnetic interference and switching loss. However, with the loss of current control, performance is expected to deteriorate. This wqrk reports the investigation into alternative commutation strategies intended to compensate for removal of the current control loop. The results, via simulation, indicate that although performance compatible with conventional schemes could not be achieved it was possible via the choice of appropriate commutation strategy(s) to achieve levels of performance acceptable to many applications.

   DIRECT CONTROL OF THE CURRENT VECTOR OF A PMSM SUPPLIED BY AN OPTIMIZED HCC-VSI
By A. Comsa; F. Meibody-Tabar; D. Arab-Khaburi; F.M. Sargos [View]
[Download]

Abstract: This paper proposes an original method to control directly the current vector d-q components of a non salient Permanent Magnet Synchronous Motor (PMSM) by hysteresis regulators. The output of these regulators and the rotor position within 60° sectors allow to drive the inverter transistors so as to minimize the number of commutations over each period. The inverter losses are so reduced. The simulation results, validated by experiments, show the efficiency of the proposed method.

EPE 1997 – 59: Dialogue Session DS5a: PERMANENT MAGNET MOTORS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1997 - Conference > EPE 1997 – 59: Dialogue Session DS5a: PERMANENT MAGNET MOTORS
	[return to parent folder]

	MODELLING AND SIMULATION OF AN AXIAL FIELD BRUSHLESS PERMANENT MAGNET MOTOR DRIVE By Nesimi Ertugrul; Eric Chong	[View] [Download]
Abstract: A simulation model for the transient and the steady-state performance prediction of an axial field three-phase brushless permanent magnet (PM) motor drive is described. The simulation is accomplished by using Matlab/Simulink. Comparisons between experimental and simulation results are presented. The comparisons indicate that the method of drive simulation using Matlab/Simulink presented in this paper delivers accurate results for different operating conditions: steady-state and transient operations.

	THE ANALYTICAL AND EXPERIMENTAL STUDY ON TORQUE PERFORMANCE OF BRUSHLESS DC DRIVES IN HIGH SPEED OPERATION By L. Tezduyar; K. Erenay; F. Sonmezoz	[View] [Download]
Abstract: This study is based on optimum phase-advance angle calculation by using a time stepping simulation technique to improve brushless DC motor torque perfonnance in voltage limit region. The solution corresponding to 120° and 180° conduction modes covers not only steady state but also dynamic behaviour of the drive system. Moreover, an analytical approach in time domain to find out optimum phase-advance angle is presented. l11e simulation and analytical results have been compared and the correlation between analytical and theoretical results have been assessed. Furthennore, experimental results are also proposed.

	ANALYTICAL CALCULATION OF WINDING LOSSES OF INVERTER-FED PM SYNCHRONOUS MOTORS WITH AIR-GAP WINDINGS AND SURFACE MOUNTED MAGNETS By Jörgen Engström; Freddy Magnussen; Hans-Peter Nee	[View] [Download]
Abstract: This paper deals with winding losses in machines with surface-mounted magnets and air-gap windings. The paper includes a method of calculating the inductance, analytical expressions for both the losses caused by the rotating flux of the magnets and the extra losses due to the skin effect caused by the inverter harmonics. Assuming an inverter with sinusoidal PWM with known harmonic content, an example is calculated.

	PERFORMANCE MAXIMISATION OF THE D.C. BRUSHLESS MOTOR WITHOUT THE AID OF DIRECT CURRENT CONTROL By M. Allan; C. Zhou	[View] [Download]
Abstract: To maximise the performance of a d.c. brushless motor the associated electronic commutator usually incorporates a current control loop designed to provide an optimum drive current waveform. An alternative approach is to employ commutation techniques that do not require the direct control of current. This eliminates the costs normally associated with current control and reduces some of the problems related to high frequency switching such as electromagnetic interference and switching loss. However, with the loss of current control, performance is expected to deteriorate. This wqrk reports the investigation into alternative commutation strategies intended to compensate for removal of the current control loop. The results, via simulation, indicate that although performance compatible with conventional schemes could not be achieved it was possible via the choice of appropriate commutation strategy(s) to achieve levels of performance acceptable to many applications.

	DIRECT CONTROL OF THE CURRENT VECTOR OF A PMSM SUPPLIED BY AN OPTIMIZED HCC-VSI By A. Comsa; F. Meibody-Tabar; D. Arab-Khaburi; F.M. Sargos	[View] [Download]
Abstract: This paper proposes an original method to control directly the current vector d-q components of a non salient Permanent Magnet Synchronous Motor (PMSM) by hysteresis regulators. The output of these regulators and the rotor position within 60° sectors allow to drive the inverter transistors so as to minimize the number of commutations over each period. The inverter losses are so reduced. The simulation results, validated by experiments, show the efficiency of the proposed method.