EPE Association: EPE 1999 - Topic 05i: Modelling and Simulation

EPE 1999 - Topic 05i: Modelling and Simulation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1999 - Conference > EPE 1999 - Topic 05: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 1999 - Topic 05i: Modelling and Simulation

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   A Frequency Analysis Investigation of Digitalized Models Useful i...
By E. De Paola; G. Marina; A. Monti; L. Tramalloni [View]
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Abstract: The authors propose, analyse and verify with experimental results a formal procedure to benchmark the digitalization effect of a non linear transfer function. As example is taken the calculation of the torque in traction applications, where, often, the calculated value is assured as the real one (no measurements) with all the consequence that it implies in case of approssimations. The main aim of this analysis is the definitiion of the accuracy of the integration method (that can differs from equation to equation) varying the integration step.

   A Microprocessor-Based Current Profiling Scheme for Field-Weakeni...
By G.K. Miti; A.C. Renfrew [View]
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Abstract: Permanent magnet excitation is beneficial in a.c. machines in which the flux is required to remain substantially constant. However, in inverter-fed drives where it is necessary to reduce the flux in ordre to operate above base speed with limited supply voltage, constant rotor excitation becomes a serious drawback. The conventional method used to achieve flux-weakening in permanent magnet motors involves phase advancing the stator currents with respect to the back emf. This paper reviews the instantanious power theory and investigates the use of the imaginary power component as an alternative means of providing field weakening in brushless dc motors. This is shown to provide a wider speed range than the conventional method, without any significant current distortion.

   Analysis of the Electrical Shift Angle Influence over a Variable Speed Two-Phase Induction Motor Drive
By M. Popescu; T. Jokinen; P. Lampola; A. Arkkio; E. Demeter; V. Navrapescu [View]
[Download]

Abstract: This paper presents the modelling and experimental studies , underlying the analysis of the electrical shifted angle influence over variable speed two-phase induction motor drive. The two-phase induction machine (TPIM) is widely used in many light-duty applications were three-phase supply is not readily available. During the development of such a machine, there are several options, including the spatial placement of the auxialiary winding. The torque-slip characteristics can be manipulated by shifting the auxiliary winding from the quadrature position. For the analyzed model, the machine stator windings are realized for three different values of the electrical shifted angle. A median point pulse with modulation (PWM) inverter with full logic control is used as a variable frequency supply. A new strategy for the controller ratio of the PWM inverter is proposed. The analysis is made for steady-state and transient state operation.

   Direct Torque Controlled (DTC) Induction Motor Drive Simulation with SABER (R)
By H. Burzanowska [View]
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Abstract: The main objective of the paper is to illustrate the possibility of using SABER (R) simulator tool for DTC control of induction motor drive. The advanced application of foreign routines is presented. The simulated results are compared with measured to demonstrate a good crrelation. the basic DTC theory and measurement results showing the strength of the simulation method are given in this paper.

   Simulation of an Induction Motor Drive under Inverter Leg Short-Circuit Operations
By J-M. Guidchon; N. Retiere; L. Gerbaud; C. Schaeffer [View]
[Download]

Abstract: This paper presents the study of leg short-circuits of a voltage source PWM inverter used for an induction motor drive. Firstly, the characteristics of the investigated drive are described. Secondly, the modelling of the drive under short-circuit operations is presented. A solution based on model switching is proposed to reduce the computation time. Finally, simulated and experimental waveforms are compared in order to validate the proposed modelling approach.

   Simulation of Load Disturbances on Saturated Cage Induction Motor Drive fed from 3/6 Pulse Cycloconverter
By R.A. Gupta; H. P. Tiwari [View]
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Abstract: Transient behavior at sudden change in load of 3/6-pulse cycloconverter fed cage induction drive is investigated considering main flux path and cross saturation effect in the motor. The mathematical model of the drive is developed. The cycloconverter is considered to be operated in non-circulating current mode. The improvement obtained due to consideration of saturation is demonstrated. Harmonic analysis of motor current is also made at full load condition. The results are discussed in details.

EPE 1999 - Topic 05i: Modelling and Simulation
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1999 - Conference > EPE 1999 - Topic 05: ELECTRICAL MACHINES AND ADJUSTABLE SPEED DRIVES > EPE 1999 - Topic 05i: Modelling and Simulation
	[return to parent folder]

	A Frequency Analysis Investigation of Digitalized Models Useful i... By E. De Paola; G. Marina; A. Monti; L. Tramalloni	[View] [Download]
Abstract: The authors propose, analyse and verify with experimental results a formal procedure to benchmark the digitalization effect of a non linear transfer function. As example is taken the calculation of the torque in traction applications, where, often, the calculated value is assured as the real one (no measurements) with all the consequence that it implies in case of approssimations. The main aim of this analysis is the definitiion of the accuracy of the integration method (that can differs from equation to equation) varying the integration step.

	A Microprocessor-Based Current Profiling Scheme for Field-Weakeni... By G.K. Miti; A.C. Renfrew	[View] [Download]
Abstract: Permanent magnet excitation is beneficial in a.c. machines in which the flux is required to remain substantially constant. However, in inverter-fed drives where it is necessary to reduce the flux in ordre to operate above base speed with limited supply voltage, constant rotor excitation becomes a serious drawback. The conventional method used to achieve flux-weakening in permanent magnet motors involves phase advancing the stator currents with respect to the back emf. This paper reviews the instantanious power theory and investigates the use of the imaginary power component as an alternative means of providing field weakening in brushless dc motors. This is shown to provide a wider speed range than the conventional method, without any significant current distortion.

	Analysis of the Electrical Shift Angle Influence over a Variable Speed Two-Phase Induction Motor Drive By M. Popescu; T. Jokinen; P. Lampola; A. Arkkio; E. Demeter; V. Navrapescu	[View] [Download]
Abstract: This paper presents the modelling and experimental studies , underlying the analysis of the electrical shifted angle influence over variable speed two-phase induction motor drive. The two-phase induction machine (TPIM) is widely used in many light-duty applications were three-phase supply is not readily available. During the development of such a machine, there are several options, including the spatial placement of the auxialiary winding. The torque-slip characteristics can be manipulated by shifting the auxiliary winding from the quadrature position. For the analyzed model, the machine stator windings are realized for three different values of the electrical shifted angle. A median point pulse with modulation (PWM) inverter with full logic control is used as a variable frequency supply. A new strategy for the controller ratio of the PWM inverter is proposed. The analysis is made for steady-state and transient state operation.

	Direct Torque Controlled (DTC) Induction Motor Drive Simulation with SABER (R) By H. Burzanowska	[View] [Download]
Abstract: The main objective of the paper is to illustrate the possibility of using SABER (R) simulator tool for DTC control of induction motor drive. The advanced application of foreign routines is presented. The simulated results are compared with measured to demonstrate a good crrelation. the basic DTC theory and measurement results showing the strength of the simulation method are given in this paper.

	Simulation of an Induction Motor Drive under Inverter Leg Short-Circuit Operations By J-M. Guidchon; N. Retiere; L. Gerbaud; C. Schaeffer	[View] [Download]
Abstract: This paper presents the study of leg short-circuits of a voltage source PWM inverter used for an induction motor drive. Firstly, the characteristics of the investigated drive are described. Secondly, the modelling of the drive under short-circuit operations is presented. A solution based on model switching is proposed to reduce the computation time. Finally, simulated and experimental waveforms are compared in order to validate the proposed modelling approach.

	Simulation of Load Disturbances on Saturated Cage Induction Motor Drive fed from 3/6 Pulse Cycloconverter By R.A. Gupta; H. P. Tiwari	[View] [Download]
Abstract: Transient behavior at sudden change in load of 3/6-pulse cycloconverter fed cage induction drive is investigated considering main flux path and cross saturation effect in the motor. The mathematical model of the drive is developed. The cycloconverter is considered to be operated in non-circulating current mode. The improvement obtained due to consideration of saturation is demonstrated. Harmonic analysis of motor current is also made at full load condition. The results are discussed in details.