Extended field weakening and overloading of high-torque density permanent magnet motors

Deak, C.; Binder, A.; Funieru, Bogdan; Mirzaei, Mehran

doi:10.1109/ecce.2009.5316366

Cited by 15 publications

(4 citation statements)

References 7 publications

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“…3, a high degree of freedom exists when designing a rotor for IPM machines with V‐shaped PMs. Investigated design parameters are chosen as a result of experience gained through numerous investigations and comprehensive literature [6–48]. On the other hand, other key parameters, such as stator outer diameter, stator slot geometry, shaft diameter, air‐gap length,

D_{2}

normalH R_{i b}

and

w_{s}

have not been considered in this paper because of these reasons: (i) their predicted obvious and/or insignificant effects (particularly due to the leakage flux); (ii) limited effects as a consequence of existing of mechanical constrains; (iii) their very limited range; (iv) not reasonable or possible to investigate its individual effect.…”

Section: Influences Of Design Parameters On Fw Performance Of Nsw Ipmmentioning

confidence: 99%

“…The steady state and FW performance characteristics of IPM machines are primarily affected by magnetic design, depending on stator/rotor topology and excitation, and sophisticated FW control techniques. From magnetic design point of view, extensively employed performance improvement methods, particularly for FW operation, are classified as follows: Winding topologies [10–16]; PM layer number, shape and position [17–23]; Flux barrier configuration and position [24–29]; PM segmentation [19, 30–34]; PM skewing [35–38]; Novel rotor topology [39–41]; Rotor shape optimisation [42–45]; Other techniques, such as excitation, axial lamination, damper bars and so on [31, 46–48]. …”

Section: Introductionmentioning

confidence: 99%

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Influence of design parameters on flux‐weakening performance of interior permanent magnet machines with novel semi‐overlapping windings

Gündoğdu

Kömürgöz

2020

IET Electric Power Applications

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This study performs a design and parametric study of interior permanent‐magnet (IPM) machines equipped with novel semi‐overlapping windings (NSWs). The influence of the key design parameters including; number of turns per phase, stack length, distance and angle between V‐shaped magnets, rotor yoke thickness, magnetic bridge width and thickness and number of magnet segments on the flux‐weakening (FW) performance characteristics are evaluated in detail. The influence of material of segmentation (material of bridge namely, air or iron) is also considered. A combination of analytical calculation‐based program and a time‐stepping 2D finite‐element analysis based program are employed to evaluate the FW characteristics. The accuracy of the FW calculations, particularly the performance at high‐speed regions, is verified over changes in torque components; namely reluctance and permanent magnet (PM), inductance components, PM flux coefficient and inverse saliency ratio due to the change in considered design parameter. The electromagnetic torque, torque ripple, output power and FW capability are investigated by parametric analyses. Moreover, the power losses and efficiency maps together FW curves are calculated for the optimal NSW IPM machine. The experimental measurements, taken from manufactured prototype, verify that the performed analyses and methods described in this study are accurate and reliable.

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D_{2}

normalH R_{i b}

and

w_{s}

Section: Influences Of Design Parameters On Fw Performance Of Nsw Ipmmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of design parameters on flux‐weakening performance of interior permanent magnet machines with novel semi‐overlapping windings

Gündoğdu

Kömürgöz

2020

IET Electric Power Applications

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“…Just take for example the torque T2 as given in Figure. 2(c), in the event of a given expected torque T2, the stator current sector remains unchanged as OB and the voltage sector increases at a higher rotatory speed of the motor, but when the voltage sector reaches the inverter's maximum output voltage us max, it will fail to remain unchanged as OB and the motor will enter the constant torque region II. In this case, the appropriate rotatory speed of the motor may be defined as the turning speed from the constant torque region I to the constant torque region II to calculate A in the voltage limit ellipse equation (10). The Figure. 2 shows the greater the given expected torque, the lower the motor's turning speed from from the constant torque region I to the constant torque region II.…”

Section: Full-speed and Field Weakening Control Strategymentioning

confidence: 99%

The Research on Full-speed Field Weakening Control Method of Electric Vehicle Interior Permanent Magnet Synchronous Motor

Gao

Zhai

2017

ITM Web Conf.

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The motor drive system represents a key technology for development of the electrical vehicles, and the permanent magnet synchronous motor becomes the mainstream of the new energy vehicle drive motor for the superior performances in power density, low-speed torque density, efficiency and reliability. The paper studies the field weakening control strategy for the interior permanent magnet synchronous motor (IPMSM) and provides a field weakening control strategy for the IPMSM at the full-speed range. By studying the mathematical IPMSM model and the methods of conventional vector control and analyzing the operating conditions of the IPMSM at the full-speed range, the paper divides the operating conditions into constant torque operation region I, constant torque operation region II, constant power field weakening operation region and high-speed field weakening operation region to confirm the control strategy algorithm in each region and the transition conditions between regions and provide the current control strategy that the d-axis current and q-axis current are confirmed by the reference torque and the feedback speed. Modeling of the field weakening control strategies in each region is made through the Matlab/Simulink, and simulation of the operating conditions with a steady-state load and a dynamic load is done to verify that the field weakening control strategy in each region is feasible. A co-simulation is made by combining the Matlab/Simulink-based control model, the RecurDyn-based virtual prototype and the RT-LAB to verify the feasible field weakening control strategy. a Corresponding

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“…PMSMs are widely used in the industry due to their high power density, high efficiency and good dynamic response [1]- [2]. One concern with PMSMs is that the PM can be irreversible demagnetized due to a combination of electrical and thermal stresses [1]- [3]. PMs are usually the weakest component of a PMSM in terms of maximum operating temperature, and will set therefore the temperature limit of the machine.…”

Section: Introductionmentioning

confidence: 99%

Influence of Magnetoresistance and Temperature on Permanent Magnet Condition Estimation Methods Using High-Frequency Signal Injection

Fernández

Martinez

Reigosa

et al. 2018

IEEE Trans. on Ind. Applicat.

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Torque production capability of permanent magnet synchronous machines (PMSMs) depends on the permanent magnets (PM) magnetization state (MS). MS is a function of PM initial magnetization level, which decreases as temperature increases. Furthermore, excessive PM temperature can produce irreversible PM demagnetization.PM MS and temperature measurement/estimation is therefore important both for torque control and monitoring purposes. The injection of a high frequency (HF) signal in the stator windings has been shown to be a viable option for temperature and MS estimation. This technique estimates the PM temperature or/and MS from the variation of the stator reflected PM HF resistance. However, since PM HF resistance is affected by both PM temperature and MS due to magnetoresistive effect, separating both effects is not trivial. This paper studies the effect of magnetoresistance and temperature on the PM resistivity, the target being twofold: to understand how temperature and MS estimation methods interfere with each other, and to further use of this knowledge for the development of methods able to estimate the magnet temperature and MS simultaneously 1

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Extended field weakening and overloading of high-torque density permanent magnet motors

Cited by 15 publications

References 7 publications

Influence of design parameters on flux‐weakening performance of interior permanent magnet machines with novel semi‐overlapping windings

Influence of design parameters on flux‐weakening performance of interior permanent magnet machines with novel semi‐overlapping windings

The Research on Full-speed Field Weakening Control Method of Electric Vehicle Interior Permanent Magnet Synchronous Motor

Influence of Magnetoresistance and Temperature on Permanent Magnet Condition Estimation Methods Using High-Frequency Signal Injection

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