EPE Association: EPE 2023 - LS6d: Advanced Control Methods of Electric Drives

EPE 2023 - LS6d: Advanced Control Methods of Electric Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 05: Renewable Energy Power Systems > EPE 2023 - LS6d: Advanced Control Methods of Electric Drives

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   Applying DBFC with Integrated Optimized Pulsed Pattern to Maximize Voltage Utilization with Low Distortion in Automotive Traction Drives
By Michael SAUR, Maximilian HEPP, Martin SILVA, Wolfgang WONDRAK [View]
[Download]

Abstract: The advantages of higher voltage utilization in automotive traction drives are higher maximum power and lower losses due to less flux weakening current. Applying overmodulation (voltagesup.91\%), in some PWM sections pulse dropping occurs and the switching frequency decreases. Additionally, in the second overmodulation region (voltage sup.95\%) the degree-of-freedom of the voltage vector angle is constrained. This is a considerable challenge for Current Vector Control (CVC). This research proposes deadbeat flux trajectory control (DBFC) integrating optimized synchronous pulse pattern (OPP) to maximize the voltage utilization up to 99\% but mitigating the disadvantages of six-step (100\%): DC-bus and phase distortion. It is demonstrated that DBFC is one single control law enabling closed-loop control in SVPWM, synchronous OPP (p=3) and six-step without any switching or transitioning between various control laws.

   Deadbeat predictive current control for non-salient PMAC machine drives at very low switching-to-fundamental frequency ratios
By Jiayue ZHOU, Xudong SUN, Meng ZHANG, Xi XIAO [View]
[Download]

Abstract: This paper focuses on current control techniques employed in non-salient permanent magnet alternating current (AC) machines, particularly at extremely low switching-to-fundamental frequency ratios (SFFR). To address this issue, a discrete deadbeat predictive control method is proposed, leveraging a precise discrete model and a complex-valued adaptive observer. Through frequency analysis, simulations, and experimental results, the stability and dynamic characteristics of the proposed method are validated even at SFFR as low as 3.

   Optimized Pulse Patterns for Anisotropic Synchronous Machines with Improved Current and Torque Properties
By Eleftherios KONTODINAS, Petros KARAMANAKOS, Andreas KRAEMER, Sebastian WENDEL [View]
[Download]

Abstract: Accounting for the anisotropy of interior permanent magnet synchronous motors (IPMSMs) during the computation of optimized pulse patterns (OPPs) improves the current quality but at the cost of increased low-order torque harmonics. To address this issue, this paper reformulates the OPP problem such that both the current and torque harmonics are kept as low as possible. To do so, the current harmonics that result in pronounced torque harmonics are constrained in the optimization process. As demonstrated with the presented numerical results, the proposed OPPs manage to simultaneously produce current and torque of high quality over a wide range of operating points.

EPE 2023 - LS6d: Advanced Control Methods of Electric Drives
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2023 ECCE Europe - Conference > EPE 2023 - Topic 05: Renewable Energy Power Systems > EPE 2023 - LS6d: Advanced Control Methods of Electric Drives
	[return to parent folder]

	Applying DBFC with Integrated Optimized Pulsed Pattern to Maximize Voltage Utilization with Low Distortion in Automotive Traction Drives By Michael SAUR, Maximilian HEPP, Martin SILVA, Wolfgang WONDRAK	[View] [Download]
Abstract: The advantages of higher voltage utilization in automotive traction drives are higher maximum power and lower losses due to less flux weakening current. Applying overmodulation (voltagesup.91\%), in some PWM sections pulse dropping occurs and the switching frequency decreases. Additionally, in the second overmodulation region (voltage sup.95\%) the degree-of-freedom of the voltage vector angle is constrained. This is a considerable challenge for Current Vector Control (CVC). This research proposes deadbeat flux trajectory control (DBFC) integrating optimized synchronous pulse pattern (OPP) to maximize the voltage utilization up to 99\% but mitigating the disadvantages of six-step (100\%): DC-bus and phase distortion. It is demonstrated that DBFC is one single control law enabling closed-loop control in SVPWM, synchronous OPP (p=3) and six-step without any switching or transitioning between various control laws.

	Deadbeat predictive current control for non-salient PMAC machine drives at very low switching-to-fundamental frequency ratios By Jiayue ZHOU, Xudong SUN, Meng ZHANG, Xi XIAO	[View] [Download]
Abstract: This paper focuses on current control techniques employed in non-salient permanent magnet alternating current (AC) machines, particularly at extremely low switching-to-fundamental frequency ratios (SFFR). To address this issue, a discrete deadbeat predictive control method is proposed, leveraging a precise discrete model and a complex-valued adaptive observer. Through frequency analysis, simulations, and experimental results, the stability and dynamic characteristics of the proposed method are validated even at SFFR as low as 3.

	Optimized Pulse Patterns for Anisotropic Synchronous Machines with Improved Current and Torque Properties By Eleftherios KONTODINAS, Petros KARAMANAKOS, Andreas KRAEMER, Sebastian WENDEL	[View] [Download]
Abstract: Accounting for the anisotropy of interior permanent magnet synchronous motors (IPMSMs) during the computation of optimized pulse patterns (OPPs) improves the current quality but at the cost of increased low-order torque harmonics. To address this issue, this paper reformulates the OPP problem such that both the current and torque harmonics are kept as low as possible. To do so, the current harmonics that result in pronounced torque harmonics are constrained in the optimization process. As demonstrated with the presented numerical results, the proposed OPPs manage to simultaneously produce current and torque of high quality over a wide range of operating points.