EPE Association: EPE 2017 - LS2e: PMSM control

EPE 2017 - LS2e: PMSM control
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 - LS2e: PMSM control

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   A Tuning Procedure for the Current Regulator Loops in Multiple Three-phase Permanent Magnet Machines with Low Switching to Fundamental Frequency Ratio
By Mikel ZABALETA [View]
[Download]

Abstract: With an increase in the wind turbine ratings, power converter ratings increase as well, thus raising the interest in medium voltage power converters. Switching frequency in said converters has to be kept below 1 kHz; hence the sampling frequency, which normally nowadays equals twice the switching frequency, is low as well. Sampling at low rates introduces additional non-idealities in the control of the converters that do not appear in low voltage applications with high switching (and sampling) frequencies. To overcome this drawback, a decoupling procedure for the machine's model and a detailed model of the current loops are developed first. This is followed by presentation of a tuning algorithm for the current regulators, which can select the controller parameters that give the desired response in terms of overshoot, settling time, minimisation of the squared error, etc. Theoretical developments are verified by simulation and experiments.

   Anisotropy-Based Position Estimation for Highly-Saturated Permanent Magnet Synchronous Machines in Slowly-Sampled Control Systems
By Marco ROETZER [View]
[Download]

Abstract: This paper presents an anisotropy-based position estimation approach taking advantage of saturationeffects in permanent magnet synchronous machines (PMSM).Due to magnetic anisotropies of the electrical machine, current responses to high-frequency voltageexcitations contain rotor position information. Therefore, the rotor position can be estimated by meansof these current responses. The relation between the high-frequency current changes, the applied phasevoltages and the rotor position is given by the inverse inductance matrix of the machine.In this paper, an analytical model of the inverse inductance matrix considering secondary anisotropies andsaturation effects is proposed. It is shown that the amount of rotor position information contained in thesecurrent changes depends on the direction of the voltage excitation and the operating point. By meansof this knowledge, a position estimation approach for slowly-sampled control systems is developed.Experimental results show the effectiveness of the proposed approach.

   High Response Voltage Phase Torque Control of IPMSM for Both Linear and Over-modulation Range of Inverter
By YOSUKE MATSUKI [View]
[Download]

Abstract: This paper proposes a high response voltage phase torque control method of interior permanent magnet synchronous motors for both linear and over-modulation range including six-step mode. In our proposed method, a new n-t coordinate system is utilized, on which voltage phase and amplitude are controlled responsively and stably.

   Synchronous Optimal Pulse-Width Modulation with differently modulated waveform symmetry properties for feeding synchronous motor with high magnetic anisotropy
By ATHINA BIRDA [View]
[Download]

Abstract: The objective of this project is the performance optimization of an electrical drive system, which consistsof a two-level Voltage Source Inverter (VSI) and a Permanent Magnet Synchronous Motor (PMSM) withhigh magnetic anisotropy. To this end, the concept of Synchronous Optimal Modulation (SOPWM) isemployed for inverter control and the optimal inverter switching angles are defined for an isotropic andan anisotropic PMSM. Thereby, the influence of the motor magnetic anisotropy on the optimization ofthe inverter pulse patterns is investigated. Lastly, the optimization results, imposing different symmetryconditions in the voltage waveform, are evaluated.

EPE 2017 - LS2e: PMSM control
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 - LS2e: PMSM control
	[return to parent folder]

	A Tuning Procedure for the Current Regulator Loops in Multiple Three-phase Permanent Magnet Machines with Low Switching to Fundamental Frequency Ratio By Mikel ZABALETA	[View] [Download]
Abstract: With an increase in the wind turbine ratings, power converter ratings increase as well, thus raising the interest in medium voltage power converters. Switching frequency in said converters has to be kept below 1 kHz; hence the sampling frequency, which normally nowadays equals twice the switching frequency, is low as well. Sampling at low rates introduces additional non-idealities in the control of the converters that do not appear in low voltage applications with high switching (and sampling) frequencies. To overcome this drawback, a decoupling procedure for the machine's model and a detailed model of the current loops are developed first. This is followed by presentation of a tuning algorithm for the current regulators, which can select the controller parameters that give the desired response in terms of overshoot, settling time, minimisation of the squared error, etc. Theoretical developments are verified by simulation and experiments.

	Anisotropy-Based Position Estimation for Highly-Saturated Permanent Magnet Synchronous Machines in Slowly-Sampled Control Systems By Marco ROETZER	[View] [Download]
Abstract: This paper presents an anisotropy-based position estimation approach taking advantage of saturationeffects in permanent magnet synchronous machines (PMSM).Due to magnetic anisotropies of the electrical machine, current responses to high-frequency voltageexcitations contain rotor position information. Therefore, the rotor position can be estimated by meansof these current responses. The relation between the high-frequency current changes, the applied phasevoltages and the rotor position is given by the inverse inductance matrix of the machine.In this paper, an analytical model of the inverse inductance matrix considering secondary anisotropies andsaturation effects is proposed. It is shown that the amount of rotor position information contained in thesecurrent changes depends on the direction of the voltage excitation and the operating point. By meansof this knowledge, a position estimation approach for slowly-sampled control systems is developed.Experimental results show the effectiveness of the proposed approach.

	High Response Voltage Phase Torque Control of IPMSM for Both Linear and Over-modulation Range of Inverter By YOSUKE MATSUKI	[View] [Download]
Abstract: This paper proposes a high response voltage phase torque control method of interior permanent magnet synchronous motors for both linear and over-modulation range including six-step mode. In our proposed method, a new n-t coordinate system is utilized, on which voltage phase and amplitude are controlled responsively and stably.

	Synchronous Optimal Pulse-Width Modulation with differently modulated waveform symmetry properties for feeding synchronous motor with high magnetic anisotropy By ATHINA BIRDA	[View] [Download]
Abstract: The objective of this project is the performance optimization of an electrical drive system, which consistsof a two-level Voltage Source Inverter (VSI) and a Permanent Magnet Synchronous Motor (PMSM) withhigh magnetic anisotropy. To this end, the concept of Synchronous Optimal Modulation (SOPWM) isemployed for inverter control and the optimal inverter switching angles are defined for an isotropic andan anisotropic PMSM. Thereby, the influence of the motor magnetic anisotropy on the optimization ofthe inverter pulse patterns is investigated. Lastly, the optimization results, imposing different symmetryconditions in the voltage waveform, are evaluated.