Operating within dynamic voltage limits during magnetization state increases in variable flux PM synchronous machines

Gagas, Brent S.; Fukushige, Takashi; Kato, Takashi; Lorenz, Robert D.

doi:10.1109/ecce.2014.6954115

Cited by 36 publications

(17 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, the torque production capability of the machine will not change dramatically during normal operation, meaning that a highly precise magnetization state estimation will not be required for this type of machines. On the contrary, VFM and STFMM can be magnetized/demagnetized during normal operation of the machine, magnetization state estimation after this process [8] being critical.…”

confidence: 99%

“…Although NdFeB rare earth permanent magnets are currently the primary option in high performance PMSMs [1][2][3][4][5][6][7], applications equipped with SmCo [8][9], AlNiCo magnets [10][11][12] and ferrite magnets [13][14][15] can also be found. More precisely, ferrite [6,7], SmCo [8][9] or AlNiCo magnets combined with NdFeB magnets [10][11][12] are commonly used in VFMs [8][9]. Ferrite magnets are often used in low cost applications including domestic appliances, and STFMM for general purpose applications, with the goal of reducing cost (see Table I [16]) and the dependence on rare earth materials, at the price of a decrease of the machine performance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Permanent magnet magnetization state estimation using high frequency signal injection

Fernández

Reigosa

Guerrero

et al. 2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

View full text Add to dashboard Cite

Abstract-Permanent magnet (PM) magnetization state estimation is important both for torque control and monitoring in conventional permanent magnet synchronous machines (PMSMs). Furthermore, this can be critical for variable flux machines (VFM). Use of high frequency signal injection methods for PM magnetization state estimation in NdFeB magnets has already been proposed. These methods make use of the variation of the PM high frequency resistance with the PM magnetization state due to the magnetoresistive effect. This paper address the generalization of magnetization state estimation using high frequency signal injection to other types of magnets like SmCo and ferrite, as well as to other magnet structures, e.g. isolated and non-isolated segmented magnets. Use of the magnetoresitive effect for the detection of irreversible/reversible PM demagnetization will also be shown to be viable.

show abstract

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Permanent magnet magnetization state estimation using high frequency signal injection

Fernández

Reigosa

Guerrero

et al. 2015

2015 IEEE Energy Conversion Congress and Exposition (ECCE)

View full text Add to dashboard Cite

show abstract

“…During the [8] first half of the trajectory (denoted by circle 1), the current MS is not equal to the desired MS*, and the only constraint is that the transient voltage required by the trajectory cannot exceed the inverter voltage limit. It is important to note, as was seen in [10], the trajectory may move outside of the steady voltage ellipse when transient voltage components partially cancel steady state voltage components. The purpose of the first half of the trajectory is to move to the fully magnetizing condition, which can be any point on the magnetizing curve.…”

Section: Process Of Increasing Magnetization State (Ms) In Variabmentioning

confidence: 97%

“…In general, active MS manipulation allows a significantly larger range of variable  pm , and will be the type considered in this work. Regarding voltage limits, [10] identified a severe limitation on the maximum speed where existing methods can increase MS when a fixed inverter bus voltage is used. Although issues of current and voltage limits This research is sponsored by Nissan Motor Co., Ltd.…”

Section: Introductionmentioning

confidence: 98%

“…[12] developed a method to implement this constant torque current vector trajectory by using a flux observer to estimate output torque and using i q current to decouple the unwanted torque ripple. In [10], the reverse rotating current vector trajectory (RRCVT) method was proposed, which achieved an extended, but still limited, high speed capability.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of Magnetizing Trajectories for Variable Flux PM Synchronous Machines Considering Voltage, High-Speed Capability, Torque Ripple, and Time Duration

Gagas

Sasaki

Fukushige

et al. 2016

IEEE Trans. on Ind. Applicat.

Self Cite

View full text Add to dashboard Cite

This paper discusses various transient trajectories for increasing the magnetization state (MS) of variable flux permanent magnet synchronous machines (VF-PMSMs), a class of PMSM where the magnets are demagnetized and remagnetized using the drive inverter during drive cycle operation. To manipulate MS, a magnetizing current pulse can be used, which may drive a large amount of flux linkage in the machine. As a result, above low speed operation, a large voltage may be required from the inverter. This paper extends several existing methods for improved voltage properties, and proposes and experimentally evaluates a new method  a straight line stationary frame flux linkage trajectory (SL s T)  for higher speed capability. The presented trajectories, along with existing trajectories, are organized into families and compared regarding their required voltage, high speed capability, torque ripple, and time duration.

show abstract

Design and control of variable field permanent magnet motors

Matsui

2019

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

This is a survey paper focusing on permanent magnet motors with variable field capability. The synchronous motors, which have been applied to somewhat limited fields, have garnered attention as attractive electric drives. Due to a connection with rare‐earth magnet and power electronics‐based flexible control, current permanent magnet synchronous motors have achieved the best position in terms of high power and torque densities, high efficiency and flexible control capability. In order to satisfy the diverse demands of users, a motor is requested to ensure high‐efficiency operation at multiple operating points on the speed–torque plane. It is well recognized that maximum efficiency is attained under the condition that the copper loss is equal to the fixed loss, mainly composed of iron loss, at a given operating point. This is why permanent magnet synchronous motors should have the capability of adjusting the field excitation, similar to the direct current shunt motors. In this paper, recent trends of research and development of variable field permanent magnet motors are overviewed from the standpoint of design and control. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

show abstract

Operating within dynamic voltage limits during magnetization state increases in variable flux PM synchronous machines

Cited by 36 publications

References 12 publications

Permanent magnet magnetization state estimation using high frequency signal injection

Permanent magnet magnetization state estimation using high frequency signal injection

Analysis of Magnetizing Trajectories for Variable Flux PM Synchronous Machines Considering Voltage, High-Speed Capability, Torque Ripple, and Time Duration

Design and control of variable field permanent magnet motors

Contact Info

Product

Resources

About