EPE Association: EPE 1985 - 23 - Lecture Session 3.09: SYNCHRONOUS MOTOR DRIVES

EPE 1985 - 23 - Lecture Session 3.09: SYNCHRONOUS MOTOR DRIVES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1985 - Conference > EPE 1985 - 23 - Lecture Session 3.09: SYNCHRONOUS MOTOR DRIVES

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   STATE ESTIMATION OF AN INVERTER FED SYNCHRONOUS MOTOR
By U. Kirberg; P. K. Sattler [View]
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Abstract: In recent years a turn from analogous to digital control systems on electrical drives can be noticed. This paper presents an aspect of introducing digital methods for control of inverter fed motors where the development of a control system using state values is planed. For the present the removal of typical mechanical sensors of the driving system as for example the rotor position sensor is to be examined. The information concerning the position of the poles is to be obtained only by means of terminal quantities of the machine. To solve the problem a non-linear filter algorithm is outlined. The structure of the filter, the simulations, the hardware configuration of the microcomputersystem and first experimental results of the filter application are presented.

   MODELLING OF TRANSlENT OPERATIONS OF SELF CONTROLLED CURRENT FED SYNCHRONOUS MOTORS
By F. Piriou; A. Razek [View]
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Abstract: In this paper a numerical simulation of self-controlled current fed synchronous motors under transient operations is proposed. The combined electromagnetic and mechanical equations of the machine are solved through the operating equations of the inverter. The different inductances of the machine are calculated from the field distribution obtained from the finite element calculations. These inductances are introduced in the variable coefficient differential equations of the machine which are solved using step-by-step numerical integration. In the present study a current regulation in the D.C. loop is used for very low speeds with forced commutation during starting. An application on a 6.2 kVA permanent magnet motor is done and results are given in the paper. Starting and transient operations due to sudden perturbations are studied.

   PERFORMANCE ANALYSIS OF A CONSTANT-HORSEPOWER CONTROL SYSTEM FOR A SELF-CONTROLLED SYNCHRONOUS MOTOR
By T. Kataoka; S. Nishikata; S. Tamai [View]
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Abstract: A detailed analysis of a self-controlled synchronous motor control system to achieve a constant-horsepower operation is presented. A basic performance of this motor in the constant-horsepower mode is first analyzed considering two types of position sensor used practically. Based on this analysis, a simple and efficient control strategy to obtain a wide speed range as well as a good power factor of the motor is then proposed, and a constant-horsepower control system employing the proposed control strategy is introduced. An analytical result of the stability of this system is shown, and the dynamic response of the system is clarified. Experimental results are included.

   A NEW DYNAMIC MODEL OF A SELF-CONTROLLED SYNCHRONOUS MOTOR DRIVE
By M. M. F. Mostafa; C. Iung [View]
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Abstract: A new second order dynamic model of a self-controlled synchronous motor drive is proposed, taking into consideration the commutation effect for a salient pole synchronous motor with two unsymmetrical damper windings and is excited from a constant field voltage. Based on the small signal linearization around the steady state operating point, the mechanical and electrical transient response functions to disturbances of the power source voltage, triggering angle, excitation level or Load Torque have been directly obtained. Moreover, the model can be easily transformed to represent a non-salient pole machine with or without damper windings excited by a constant field current or by a constant field voltage. Therefore the effect of the damper windings as well as the effect of the fluctuation in the field current on the dynamic behavior could be rapidly analyzed comparing the position of the main poles in the S-plane. The transient responses obtained using this simplified model are confirmed by a digital simulation program which virtually approves the validity and the accuracy of the proposed model.

EPE 1985 - 23 - Lecture Session 3.09: SYNCHRONOUS MOTOR DRIVES
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1985 - Conference > EPE 1985 - 23 - Lecture Session 3.09: SYNCHRONOUS MOTOR DRIVES
	[return to parent folder]

	STATE ESTIMATION OF AN INVERTER FED SYNCHRONOUS MOTOR By U. Kirberg; P. K. Sattler	[View] [Download]
Abstract: In recent years a turn from analogous to digital control systems on electrical drives can be noticed. This paper presents an aspect of introducing digital methods for control of inverter fed motors where the development of a control system using state values is planed. For the present the removal of typical mechanical sensors of the driving system as for example the rotor position sensor is to be examined. The information concerning the position of the poles is to be obtained only by means of terminal quantities of the machine. To solve the problem a non-linear filter algorithm is outlined. The structure of the filter, the simulations, the hardware configuration of the microcomputersystem and first experimental results of the filter application are presented.

	MODELLING OF TRANSlENT OPERATIONS OF SELF CONTROLLED CURRENT FED SYNCHRONOUS MOTORS By F. Piriou; A. Razek	[View] [Download]
Abstract: In this paper a numerical simulation of self-controlled current fed synchronous motors under transient operations is proposed. The combined electromagnetic and mechanical equations of the machine are solved through the operating equations of the inverter. The different inductances of the machine are calculated from the field distribution obtained from the finite element calculations. These inductances are introduced in the variable coefficient differential equations of the machine which are solved using step-by-step numerical integration. In the present study a current regulation in the D.C. loop is used for very low speeds with forced commutation during starting. An application on a 6.2 kVA permanent magnet motor is done and results are given in the paper. Starting and transient operations due to sudden perturbations are studied.

	PERFORMANCE ANALYSIS OF A CONSTANT-HORSEPOWER CONTROL SYSTEM FOR A SELF-CONTROLLED SYNCHRONOUS MOTOR By T. Kataoka; S. Nishikata; S. Tamai	[View] [Download]
Abstract: A detailed analysis of a self-controlled synchronous motor control system to achieve a constant-horsepower operation is presented. A basic performance of this motor in the constant-horsepower mode is first analyzed considering two types of position sensor used practically. Based on this analysis, a simple and efficient control strategy to obtain a wide speed range as well as a good power factor of the motor is then proposed, and a constant-horsepower control system employing the proposed control strategy is introduced. An analytical result of the stability of this system is shown, and the dynamic response of the system is clarified. Experimental results are included.

	A NEW DYNAMIC MODEL OF A SELF-CONTROLLED SYNCHRONOUS MOTOR DRIVE By M. M. F. Mostafa; C. Iung	[View] [Download]
Abstract: A new second order dynamic model of a self-controlled synchronous motor drive is proposed, taking into consideration the commutation effect for a salient pole synchronous motor with two unsymmetrical damper windings and is excited from a constant field voltage. Based on the small signal linearization around the steady state operating point, the mechanical and electrical transient response functions to disturbances of the power source voltage, triggering angle, excitation level or Load Torque have been directly obtained. Moreover, the model can be easily transformed to represent a non-salient pole machine with or without damper windings excited by a constant field current or by a constant field voltage. Therefore the effect of the damper windings as well as the effect of the fluctuation in the field current on the dynamic behavior could be rapidly analyzed comparing the position of the main poles in the S-plane. The transient responses obtained using this simplified model are confirmed by a digital simulation program which virtually approves the validity and the accuracy of the proposed model.