A Computational Study of Efficiency Map Calculation for Synchronous AC Motor Drives Including Cross-Coupling and Saturation Effects

Mohammadi, Mohammad Hossain; Lowther, D.A.

doi:10.1109/tmag.2017.2661994

Cited by 34 publications

(13 citation statements)

References 7 publications

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“…The performance evaluation of the studied SA methods is provided in this section, where the third-generation TOYOTA Prius is re-modelled for simulation purposes. The targeted EM is well studied in [224][225][226][227][228][229]. The main specifications of the EM are given in Table IV.…”

Section: Numerical-based Discussion and Verificationmentioning

confidence: 99%

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Asef

Lapthorn

2021

IEEE Access

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A robust design in electrified powertrains substantially helps to enhance the vehicle's overall efficiency. Robustness analyses come with complexity and computational costs at the vehicle level. The use of sensitivity analysis (SA) methods in the design phase has gained popularity in recent years to improve the performance of road vehicles while optimizing the resources, reducing the costs, and shortening the development time. Designers have started to utilize the SA methods to explore: i) how the component and vehicle level design options affect the main outputs i.e. energy efficiency and energy consumption; ii) observing sub-dependent parameters, which might be influenced by the variation of the targeted controllable (i.e. magnet thickness) and uncontrollable (i.e. magnet temperature) variables, in nonlinear dynamic systems; and iii) evaluating the interactions, of both dependent, and sub-dependent controllable/uncontrollable variables, under transient conditions. Hence the aim of this study is to succinctly review recent utilization of SA methods in the design of AC electric machines (EM)s used in vehicle powertrains, to evaluate and discuss the findings presented in recent research papers while summarizing the current state of knowledge. By systematically reviewing the literature on applied SAs in electrified powertrains, we offer a bibliometric analysis of the trends of application-oriented SA studies in the last and next decades. Finally, a numericalbased case study on a third-generation TOYOTA Prius EM will be given, to verify the SA-related findings of this paper, alongside future works recommendations.INDEX TERMS Automotive engineering, AC machines, electric vehicles, robustness, sensitivity analysis, permanent magnet machines, time series analysis, statistics.

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Section: Numerical-based Discussion and Verificationmentioning

confidence: 99%

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Asef

Lapthorn

2021

IEEE Access

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“…where, L is the fiber length between the supply and the winding wheels, υ w and υ s are the real-time linear speed of the winding and supply wheels respectively, t is the time interval. We assume that υ w and υ s remained unchanged during t. Added tension would be induced when υ w > υ s , so the key of tension control is linear velocity adjusting to the supply and winding motors, as shown in (8).…”

Section: A System Mechanical Analysismentioning

confidence: 99%

“…These traditional methods can't eliminate nonlinear tension oscillation. Complicated control strategies such as neural-network-based adaptive control [7] and crosscoupling control [8], et al, were proposed to deal with multimotor synchronous controlling. But tension control during FOC winding is rapid micro-tension adjustment, and is not just the issue of multi-motors synchronization control but a very complex issue due to its time lag, uncertainty and complexity.…”

Section: Introductionmentioning

confidence: 99%

Constant Small Tension Control for Fiber Optic Coil Variable-Velocity Winding

Yang

Guo

2019

IEEE Access

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Fiber Optic Gyroscope (FOG) is a new type of rotation sensor that plays an important role in navigation and guidance system. As the sense element of FOG, the fiber coil (FOC) performance directly affects the FOG measurement precision. Many factors influence the quality of FOC, ideal structure and constant small tension control in the winding process were key factors. In order to prevent FOC edge defect, we proposed piecewise variable speed winding method to make regular FOC structure more accessible. In view of the shortage of the common control method used in FOC winding, we optimized fuzzy PID by introducing domain adjusting factors and designed a new tension controller based on mechanical analysis. The optimization controller can adaptively adjust the control factors to ideal settings and ensure constant tension throughout all variable winding speeds stages even in the present of complex external disturbance. Comparative experiments shown that the new controller has a higher accuracy and better robustness than commonly used controller.

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“…During high-speed EV operation, IPMSMs are typically subject to flux weakening; in this condition, the motor iron loss, more precisely the eddy-current loss, tends to significantly increase, thus reducing efficiency. In [16], Mohammadi and Lowther consider the 2010 Toyota Prius IPMSM and a PMassisted synchronous reluctance machine, and use nonlinear motor control formulations, i.e., maximum-torque-per-ampere (MTPA), flux weakening, and maximum-torque-pervoltage (MTPV), in the computation of the efficiency maps, while accounting for both saturation and cross-coupling effects. MTPA and MTPV algorithms [17][18][19][20][21][22][23][24] are widely used to enhance the efficiency and control performance of IPMSMs, below and above the base speed, respectively.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Energy Consumption and Drivability Performance of an IPMSM-Driven Electric Vehicle Using Different Buried Magnet Arrangements

et al. 2021

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This study investigates the influence of the buried magnet arrangement on the efficiency and drivability performance provided by an on-board interior permanent magnet synchronous machine for a four-wheel-drive electric car with two single-speed on-board powertrains. The relevant motor characteristics, including flux-linkage, inductance, electromagnetic torque, iron loss, total loss, and efficiency, are analyzed for a set of six permanent magnet configurations suitable for the specific machine, which is controlled through maximum-torque-per-ampere and maximum-torque-per-voltage strategies. Moreover, the impact of each magnet arrangement is analyzed in connection with the energy consumption along four driving cycles, as well as the longitudinal acceleration and gradeability performance of the considered vehicle. The simulation results identify the most promising rotor solutions, and show that: (i) the appropriate selection of the rotor configuration is especially important for the driving cycles with substantial high-speed sections; (ii) the magnet arrangement has a major impact on the maximum motor torque below the base speed, and thus on the longitudinal acceleration and gradeability performance; and (iii) the configurations that excel in energy efficiency are among the worst in terms of drivability, and vice versa, i.e., at the vehicle level, the rotor arrangement selection is a trade-off between energy efficiency and longitudinal vehicle dynamics.

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A Computational Study of Efficiency Map Calculation for Synchronous AC Motor Drives Including Cross-Coupling and Saturation Effects

Cited by 34 publications

References 7 publications

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Overview of Sensitivity Analysis Methods Capabilities for Traction AC Machines in Electrified Vehicles

Constant Small Tension Control for Fiber Optic Coil Variable-Velocity Winding

Assessment of the Energy Consumption and Drivability Performance of an IPMSM-Driven Electric Vehicle Using Different Buried Magnet Arrangements

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