EPE Association: EPE 2019 - DS2h: High Performance Drives, Robotics

EPE 2019 - DS2h: High Performance Drives, Robotics
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2019 ECCE Europe - Conference > EPE 2019 - Topic 04: Electrical Machines and Drive Systems > EPE 2019 - DS2h: High Performance Drives, Robotics

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   Comparison of Two Types of Extended Electromotive Force Models in Middle / High Speed ranges Position Sensorless Control
By Kazuki OHTA [View]
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Abstract: In this paper, two types of Extended Electromotive Force (EEMF) models are compared and the difference between the position sensorless control performance of these models are also discussed by mathematical equation and experiments.

   Fault-Tolerant DTC Technique for an Inverter-Fed Five-Phase Induction Motor Drive with an Open-Phase Fault
By Bheemaiah CHIKONDRA [View]
[Download]

Abstract: The direct torque control (DTC) is one of the powerful, simplest, and fast response technique for high-performance industrial drives application. The conventional and virtual vector (VV) based DTC has been successfully extended for the pre-fault operation of five-phase induction motor (FPIM) drive recently. For the fault-tolerant FPIM, the implementation of DTC is a challenging task to operate the motor with loss of one phase (open-phase fault). To eliminate, the distorted stator currents in FPIM with distributed winding, the third harmonic voltage need to eliminate. For this, the VV concept has been used. In this paper, the DTC technique for a two-level inverter-fed FPIM drive with an open-phase fault has proposed with a modified look-up table. It is based on the VVs concept and its theoretical analysis. The theoretical analysis figured out the VVs impact on change in torque as well as flux response with different speed and loading conditions. From this analysis, the modified look-up table has been constructed. The MATLAB/Simulink results are provided to verify the proposed controller effectiveness under the post-fault situation with an open-phase fault.

   MTPA Control of IPMSM with Online Parameter Estimation
By Meifen CAO [View]
[Download]

Abstract: A high efficiency control of interior permanent magnet synchronous motors (IPMSM) with online parameter estimation is proposed in this paper. It is known that for high efficiency driving, it is necessary to control the armature current phase accurately. On the other hand, the optimal armature current phase is determined by the motor parameters. However, it is difficult to obtain the accurate motor parameters during driving because of magnet saturation, inductance variation and parameter dependency on temperature. In this paper, an online parameter estimation method by applying the recursive least squares method is proposed. The usefulness of the proposed method is verified by efficiency comparison between the maximum torque per ampere (MTPA) control using online estimated parameters and using nominal parameters.

   Position Sensorless Control of IPMSM in Overall Speed Range by Extended EMF
By Takumi NIMURA [View]
[Download]

Abstract: We present the redefined Extended EMF, which is proportional to not only rotor speed but also highfrequency injected signal. We propose smooth and simple overall speed range position estimation byonly using the redefined Extended EMF without switching control method at all.

   Proposal of Electrolytic Capacitor-less and Reactor-less drive system using triple three phase PMSM
By Sari MAEKAWA [View]
[Download]

Abstract: In order to drive the PMSM with a three phase ac source, a converter and an inverter such as a PWM rectifier for source harmonics suppression are required. However, capacitors and reactors constituting converters make increase the system size and cost. In this paper, we propose a novel drive system using the triple three phase PMSM and three parallel inverters synchronously controlled with three phase ac source.

   Study on New Modulation Technique to Improve the Performance of PMSM
By Satoshi JORYO [View]
[Download]

Abstract: This paper proposes a new modulation technique for the inverter to drive the Permanent MagnetSynchronous Motor (PMSM). It has three advantages and experimental verification was conducted inorder to obtain the merits. The results show that the proposed method increased torque and reducedtorque ripple compared with other modulation techniques.

   Synthesis of the Robust Electric Drive for Robot Control Using PI Controllers Parameterization on the Basis of Root Locus Approach
By Alla NESENCHUK [View]
[Download]

Abstract: A robust control methods are proposed in the paper. This methods provide sufficient conditions for control system roots placement within a required complex plane region in conditions of the plant parameters interval uncertainty. The methods are based on the root locus theory and are applicable for PI controllers parameterization in electric drive vector control systems, mainly in cases of plant parameters uncertainty. The n-axial robot arms electrical drive control system features substantial plant parameters variations due to the inertia factors deviation when the arms rotate. So, the control system must assure robustness to the plant parameters variations. For PI controllers parameterization the low order linearized plant model is applied. Though such a model differs significantly from the real nonlinear MIMO system, the robust control offers the necessary dynamics quality. The simulation results are represented for two axes arm of industrial robot and confirm the effectiveness of the developed methods.

   Using Flux and Current for Robust Wide-Speed Operation of IPMSMs
By Marc PETIT [View]
[Download]

Abstract: Deadbeat-direct torque and flux control (DB-DTFC) provides accurate and robust torque control, is well suited for dynamic loss optimization, and can utilize the full inverter volt-second hexagon. However, when operating at the voltage and current limits, the DB-DTFC control law becomes more complex and parameter sensitive since it relies on accurate flux trajectories that minimize losses while respecting voltage and current limits. This paper proposes techniques to operate at the voltage limits even if it is infeasible to achieve the torque command in one switching period. When the torque command is infeasible due to the voltage limits the proposed techniques allow DB-DTFC to transiently go into overmodulation to deliver a fast torque response. Furthermore, it is very crucial for direct torque controlled drives to guarantee that the torque command does not exceed the current limits. This paper proposes a robust method to integrate current limits into the DB-DTFC control law. If the torque command requires more than rated current, then the torque is automatically saturated to the maximum feasible torque. This technique does not only enable the drive to operate at the current limit, but also allows for operation in the deep field-weakening region. The paper evaluates the proposed methods in a quasi-steady-state operation by comparing current loci over a wide speed range with inaccurate parameters. Moreover, the paper evaluates speed and torque transients at current and voltage limits using step responses below and above the base speed.

EPE 2019 - DS2h: High Performance Drives, Robotics
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2019 ECCE Europe - Conference > EPE 2019 - Topic 04: Electrical Machines and Drive Systems > EPE 2019 - DS2h: High Performance Drives, Robotics
	[return to parent folder]

	Comparison of Two Types of Extended Electromotive Force Models in Middle / High Speed ranges Position Sensorless Control By Kazuki OHTA	[View] [Download]
Abstract: In this paper, two types of Extended Electromotive Force (EEMF) models are compared and the difference between the position sensorless control performance of these models are also discussed by mathematical equation and experiments.

	Fault-Tolerant DTC Technique for an Inverter-Fed Five-Phase Induction Motor Drive with an Open-Phase Fault By Bheemaiah CHIKONDRA	[View] [Download]
Abstract: The direct torque control (DTC) is one of the powerful, simplest, and fast response technique for high-performance industrial drives application. The conventional and virtual vector (VV) based DTC has been successfully extended for the pre-fault operation of five-phase induction motor (FPIM) drive recently. For the fault-tolerant FPIM, the implementation of DTC is a challenging task to operate the motor with loss of one phase (open-phase fault). To eliminate, the distorted stator currents in FPIM with distributed winding, the third harmonic voltage need to eliminate. For this, the VV concept has been used. In this paper, the DTC technique for a two-level inverter-fed FPIM drive with an open-phase fault has proposed with a modified look-up table. It is based on the VVs concept and its theoretical analysis. The theoretical analysis figured out the VVs impact on change in torque as well as flux response with different speed and loading conditions. From this analysis, the modified look-up table has been constructed. The MATLAB/Simulink results are provided to verify the proposed controller effectiveness under the post-fault situation with an open-phase fault.

	MTPA Control of IPMSM with Online Parameter Estimation By Meifen CAO	[View] [Download]
Abstract: A high efficiency control of interior permanent magnet synchronous motors (IPMSM) with online parameter estimation is proposed in this paper. It is known that for high efficiency driving, it is necessary to control the armature current phase accurately. On the other hand, the optimal armature current phase is determined by the motor parameters. However, it is difficult to obtain the accurate motor parameters during driving because of magnet saturation, inductance variation and parameter dependency on temperature. In this paper, an online parameter estimation method by applying the recursive least squares method is proposed. The usefulness of the proposed method is verified by efficiency comparison between the maximum torque per ampere (MTPA) control using online estimated parameters and using nominal parameters.

	Position Sensorless Control of IPMSM in Overall Speed Range by Extended EMF By Takumi NIMURA	[View] [Download]
Abstract: We present the redefined Extended EMF, which is proportional to not only rotor speed but also highfrequency injected signal. We propose smooth and simple overall speed range position estimation byonly using the redefined Extended EMF without switching control method at all.

	Proposal of Electrolytic Capacitor-less and Reactor-less drive system using triple three phase PMSM By Sari MAEKAWA	[View] [Download]
Abstract: In order to drive the PMSM with a three phase ac source, a converter and an inverter such as a PWM rectifier for source harmonics suppression are required. However, capacitors and reactors constituting converters make increase the system size and cost. In this paper, we propose a novel drive system using the triple three phase PMSM and three parallel inverters synchronously controlled with three phase ac source.

	Study on New Modulation Technique to Improve the Performance of PMSM By Satoshi JORYO	[View] [Download]
Abstract: This paper proposes a new modulation technique for the inverter to drive the Permanent MagnetSynchronous Motor (PMSM). It has three advantages and experimental verification was conducted inorder to obtain the merits. The results show that the proposed method increased torque and reducedtorque ripple compared with other modulation techniques.

	Synthesis of the Robust Electric Drive for Robot Control Using PI Controllers Parameterization on the Basis of Root Locus Approach By Alla NESENCHUK	[View] [Download]
Abstract: A robust control methods are proposed in the paper. This methods provide sufficient conditions for control system roots placement within a required complex plane region in conditions of the plant parameters interval uncertainty. The methods are based on the root locus theory and are applicable for PI controllers parameterization in electric drive vector control systems, mainly in cases of plant parameters uncertainty. The n-axial robot arms electrical drive control system features substantial plant parameters variations due to the inertia factors deviation when the arms rotate. So, the control system must assure robustness to the plant parameters variations. For PI controllers parameterization the low order linearized plant model is applied. Though such a model differs significantly from the real nonlinear MIMO system, the robust control offers the necessary dynamics quality. The simulation results are represented for two axes arm of industrial robot and confirm the effectiveness of the developed methods.

	Using Flux and Current for Robust Wide-Speed Operation of IPMSMs By Marc PETIT	[View] [Download]
Abstract: Deadbeat-direct torque and flux control (DB-DTFC) provides accurate and robust torque control, is well suited for dynamic loss optimization, and can utilize the full inverter volt-second hexagon. However, when operating at the voltage and current limits, the DB-DTFC control law becomes more complex and parameter sensitive since it relies on accurate flux trajectories that minimize losses while respecting voltage and current limits. This paper proposes techniques to operate at the voltage limits even if it is infeasible to achieve the torque command in one switching period. When the torque command is infeasible due to the voltage limits the proposed techniques allow DB-DTFC to transiently go into overmodulation to deliver a fast torque response. Furthermore, it is very crucial for direct torque controlled drives to guarantee that the torque command does not exceed the current limits. This paper proposes a robust method to integrate current limits into the DB-DTFC control law. If the torque command requires more than rated current, then the torque is automatically saturated to the maximum feasible torque. This technique does not only enable the drive to operate at the current limit, but also allows for operation in the deep field-weakening region. The paper evaluates the proposed methods in a quasi-steady-state operation by comparing current loci over a wide speed range with inaccurate parameters. Moreover, the paper evaluates speed and torque transients at current and voltage limits using step responses below and above the base speed.