EPE Association: EPE-PEMC 2000 - Topic 11b: PMSM Drives

EPE-PEMC 2000 - Topic 11b: PMSM Drives
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 11: Industrial Drive Systems > EPE-PEMC 2000 - Topic 11b: PMSM Drives

   [return to parent folder]

   A New Approach to Torque Filtering of a PMSM Working Under Fault Conditions
By Martin J.P., Meibody-Tabar F., Davat B. [View]
[Download]

Abstract: In this paper a non-sinusoidal non-salient PMSM of high phase number, separately supplied by its own H-bridge VSI, is studied. This segmented architecture of supply gives a high degree of redundancy to the assembly H-bridge VSIs - high phase number PMSM. In addition to the modularity of the used H-bridge VSI, which can lead to a considerable economical gain, each H-bridge has to transit lower rates of power. This enables us to impose a current waveform, which is more similar to optimal waveforms, by switching at higher frequency. In the first part, under normal operating conditions, a trapezoidal current waveform is defined in order to minimize the torque ripple rate and the copper losses. In the second part, several methods to reduce the torque undulation generated by one or several disconnected phases are presented and their performances are compared. The most efficient methods are the ones based on the modification of one or several phase current waveforms.

   Current Control of PMSM Fed by Two and Three Level Voltage Source Inverter
By Kadjoudj M., Benbouzid M.E.H.*, Abdessemed R., Ghennai C. [View]
[Download]

Abstract: The permanent magnet synchronous motor (PMSM) has numerous advantages over other machines that are conventionally used for AC servo drives. Sinusoidal PMSM drives are capable of achieving high performance servo control. Additionally, they may allow high speed operation range using vector control techniques. The control techniques are used to extract the high efficiency operation and extremely fast dynamic response which are inherent characteristics of well designed PMSM machines. In order to assure high performances and robustness of the PMSM drives, hysteresis and PWM currents regulators are used to ensure that the actual currents flowing into the motor are as close as possible to the sinusoidal reference. In this paper, a description, analyse and evaluation of the use of hysteresis current controllers when used in PMSM fed by two and three levels inverter are presented. The effects of changing the magnitude of the hysteresis window on the motor torque pulsation, the inverter switching frequency and drive performances are also examined by predicting accurately the stator current wave, resulting torque pulsation and speed response.

   Development of an Optimum Current Torque Sensorless Vector Control for Permanent Magnet Synchronous Motors
By Pagá T., Pesse G., Giménes M.I.de Guzmán, Guzmán V.M. [View]
[Download]

Abstract: This work presents vector control techniques incorporating current minimization that can be used to control permanent magnet synchronous machines (PMSM) of different manufactured types. The proposed techniques are tested first by simulation, using a PMSM model and then using a real machine in a laboratory test rig. The simulation and experimental results are analyzed, proving the applicability of the proposed control techniques.

   Field-Oriented Control of Permanent Magnet Synchronous Motor without Current Sensors
By Klíma B., Skalický J. [View]
[Download]

Abstract: In many applications there are used low-power servodrives with permanent magnet synchronous motors (PMSM). Low-voltage inverters often feed those servodrives, because it is easier to manufacture stator winding with fewer turns by thick wire then more turns by thin wire. Typical DC-link voltage levels are 24V or 48V. The inverter power circuits of such servodrives typically consist of low-cost MOSFET transistors. Generally, with increasing of DC-link voltage material cost of power circuits of servodrive increase too. In case of low-voltage and low-power servodrive the main rate of material costs is located in control circuits of the inverter. This article describes a field - oriented control method of PMSM without current sensors. The rotor speed and rotor position is sensed. By this method all circuits for current sensing are eliminated. This problem is solved as a part of project CEZ J22/98: 26 22 000 10.

   Mathematical Analysis of Stability for Permanent Magnet Synchronous Motor with Fuzzy Logic Control
By Fabijañski P., Lagoda R. [View]
[Download]

Abstract: This paper deals with fuzzy logic control of inverter fed permanent magnet synchronous motor (PMSM). In this article mathematical model of the motor drive system and stability condition of fuzzy logic control algorithm are represented. The essential fuzzy logic control configuration system consits of an internal current regulation loop and an external speed regulation loop. The speed and current loop in these systems are generally controlled by PI controller.

   Novel PWM Current Vector Control Method of the PM Synchronous Servo Drive with Rectangular Field
By Schmidt I., Vincze K., Veszprémi K., Seller B.* [View]
[Download]

Abstract: Permanent magnet synchronous motors are often used in servo drives. The spatial distribution of the flux density can be rectangular or sinusoidal. The adjustment of the supply resulting in a pulsation-free torque is dependent on the flux density waveform. The motor with rectangular flux density is examined by Park-vectors in this paper. Basically there are two ways for the current control of the synchronous servo drive with rectangular flux density: the traditional two-phase conducting control with 60° skipping current vector, and the novel three-phase conducting control with continuously moving current vector. Both of them are PWM current vector control, and both of them can be implemented by hysteresis control or by pulse width modulator. The new method is derived, investigated and compared to the traditional one in more respects.

EPE-PEMC 2000 - Topic 11b: PMSM Drives
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 11: Industrial Drive Systems > EPE-PEMC 2000 - Topic 11b: PMSM Drives
	[return to parent folder]

	A New Approach to Torque Filtering of a PMSM Working Under Fault Conditions By Martin J.P., Meibody-Tabar F., Davat B.	[View] [Download]
Abstract: In this paper a non-sinusoidal non-salient PMSM of high phase number, separately supplied by its own H-bridge VSI, is studied. This segmented architecture of supply gives a high degree of redundancy to the assembly H-bridge VSIs - high phase number PMSM. In addition to the modularity of the used H-bridge VSI, which can lead to a considerable economical gain, each H-bridge has to transit lower rates of power. This enables us to impose a current waveform, which is more similar to optimal waveforms, by switching at higher frequency. In the first part, under normal operating conditions, a trapezoidal current waveform is defined in order to minimize the torque ripple rate and the copper losses. In the second part, several methods to reduce the torque undulation generated by one or several disconnected phases are presented and their performances are compared. The most efficient methods are the ones based on the modification of one or several phase current waveforms.

	Current Control of PMSM Fed by Two and Three Level Voltage Source Inverter By Kadjoudj M., Benbouzid M.E.H., Abdessemed R., Ghennai C.*	[View] [Download]
Abstract: The permanent magnet synchronous motor (PMSM) has numerous advantages over other machines that are conventionally used for AC servo drives. Sinusoidal PMSM drives are capable of achieving high performance servo control. Additionally, they may allow high speed operation range using vector control techniques. The control techniques are used to extract the high efficiency operation and extremely fast dynamic response which are inherent characteristics of well designed PMSM machines. In order to assure high performances and robustness of the PMSM drives, hysteresis and PWM currents regulators are used to ensure that the actual currents flowing into the motor are as close as possible to the sinusoidal reference. In this paper, a description, analyse and evaluation of the use of hysteresis current controllers when used in PMSM fed by two and three levels inverter are presented. The effects of changing the magnitude of the hysteresis window on the motor torque pulsation, the inverter switching frequency and drive performances are also examined by predicting accurately the stator current wave, resulting torque pulsation and speed response.

	Development of an Optimum Current Torque Sensorless Vector Control for Permanent Magnet Synchronous Motors By Pagá T., Pesse G., Giménes M.I.de Guzmán, Guzmán V.M.	[View] [Download]
Abstract: This work presents vector control techniques incorporating current minimization that can be used to control permanent magnet synchronous machines (PMSM) of different manufactured types. The proposed techniques are tested first by simulation, using a PMSM model and then using a real machine in a laboratory test rig. The simulation and experimental results are analyzed, proving the applicability of the proposed control techniques.

	Field-Oriented Control of Permanent Magnet Synchronous Motor without Current Sensors By Klíma B., Skalický J.	[View] [Download]
Abstract: In many applications there are used low-power servodrives with permanent magnet synchronous motors (PMSM). Low-voltage inverters often feed those servodrives, because it is easier to manufacture stator winding with fewer turns by thick wire then more turns by thin wire. Typical DC-link voltage levels are 24V or 48V. The inverter power circuits of such servodrives typically consist of low-cost MOSFET transistors. Generally, with increasing of DC-link voltage material cost of power circuits of servodrive increase too. In case of low-voltage and low-power servodrive the main rate of material costs is located in control circuits of the inverter. This article describes a field - oriented control method of PMSM without current sensors. The rotor speed and rotor position is sensed. By this method all circuits for current sensing are eliminated. This problem is solved as a part of project CEZ J22/98: 26 22 000 10.

	Mathematical Analysis of Stability for Permanent Magnet Synchronous Motor with Fuzzy Logic Control By Fabijañski P., Lagoda R.	[View] [Download]
Abstract: This paper deals with fuzzy logic control of inverter fed permanent magnet synchronous motor (PMSM). In this article mathematical model of the motor drive system and stability condition of fuzzy logic control algorithm are represented. The essential fuzzy logic control configuration system consits of an internal current regulation loop and an external speed regulation loop. The speed and current loop in these systems are generally controlled by PI controller.

	Novel PWM Current Vector Control Method of the PM Synchronous Servo Drive with Rectangular Field By Schmidt I., Vincze K., Veszprémi K., Seller B.*	[View] [Download]
Abstract: Permanent magnet synchronous motors are often used in servo drives. The spatial distribution of the flux density can be rectangular or sinusoidal. The adjustment of the supply resulting in a pulsation-free torque is dependent on the flux density waveform. The motor with rectangular flux density is examined by Park-vectors in this paper. Basically there are two ways for the current control of the synchronous servo drive with rectangular flux density: the traditional two-phase conducting control with 60° skipping current vector, and the novel three-phase conducting control with continuously moving current vector. Both of them are PWM current vector control, and both of them can be implemented by hysteresis control or by pulse width modulator. The new method is derived, investigated and compared to the traditional one in more respects.