Characteristics of IPMSM According to Rotor Design Considering Nonlinearity of Permanent Magnet

Park, Min-Ro; Kim, Hae-Joong; Choi, Yun-Yong; Hong, Jung-Pyo; Lee, Jeong-Jong

doi:10.1109/tmag.2015.2482987

Cited by 23 publications

(4 citation statements)

References 12 publications

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“…Hence it is necessary to take the temperature effect into consideration. If we assume that the maximum temperature is 70 • C, then for a ferrite magnet or a Nd-Fe-B magnet the characteristics are linear [26,27]. The new parameter values can be determined as follows:…”

Section: Temperature Effect On Current Pi Controllermentioning

confidence: 99%

Stability analysis of sensorless speed control of IPMSM

Altaey

Kulaksız

2017

IEEJ Transactions Elec Engng

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In the speed control of an interior permanent magnet synchronous motor (IPMSM), for stability reasons, the closed-loop pole positions should be on the left-hand side of the S-plane, and for fast response requirements these poles should have a small time constant. Unfortunately, the motor poles have a very long time constant, which makes the system response very slow. To solve this problem, the zeros of PI controllers are used to compensate the motor poles. As the motor operates, the temperature increases, which changes the parameters of the motor and, accordingly, the motor poles change their position so the PI controller cannot compensate these poles. To solve this problem, many parameter estimation algorithms have been used to detect new parameter values and adapt the PI controller gains so that to compensate the motor poles continually. These parameter estimation algorithms complicate and add cost to the system. This paper demonstrates that, for a temperature up to 70 • C, the system is capable of giving fast response and stable operation by using a good design of the PI controller regardless of the parameter changes.

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Section: Temperature Effect On Current Pi Controllermentioning

confidence: 99%

Stability analysis of sensorless speed control of IPMSM

Altaey

Kulaksız

2017

IEEJ Transactions Elec Engng

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“…Therefore, demagnetization will occur whenever the external magnetic field is applied to bonded magnets, even during normal operation. A method for demagnetization analysis considering the nonlinearity of bonded magnets has been proposed, and has been applied to IPMSMs with different rotor designs (21) . We have also proposed a demagnetization analysis method for a Permanent magnet synchronous reluctance motor (PMASynRM) with bonded magnets (22)(23) .…”

Section: Introductionmentioning

confidence: 99%

Effect of Variable Recoil Permeability on Demagnetization Characteristics of Permanent Magnet Assisted Synchronous Reluctance Motor with Bonded Magnets

et al. 2021

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Irreversible demagnetization analysis is complicated in motors with bonded magnets that have unique B-H curves and do not exhibit distinct knee points. We have proposed a permanent magnet assisted synchronous motor (PMASynRM) with bonded magnets and examined its demagnetization characteristics by assuming the relative recoil permeability (rec) as constant to simplify the analysis. However, the present recoil loop measurements of bonded magnets show that rec has different characteristics depending on the magnitude of the reverse magnetic field intensity at the working point of the magnet and temperature. Therefore, this study presents a demagnetization analysis method based on these measurement results and investigates the demagnetization characteristics of a PMASynRM considering the variation in rec for bonded magnets. The results of the demagnetization analysis considering the variation in rec are compared with those where rec is assumed to be constant. The comparison results indicate that there is no problem with assuming a constant rec of 1.15 in the demagnetization analysis of a motor with bonded magnets.

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“…The V‐shaped PM motor has the highest saliency ratio. In [5], the demagnetisation characteristics of PMs in four IPMSMs with the flat‐shape, the V‐shape, the flux concentrated and the flux concentrated‐V rotor topologies considering the non‐linearity of PMs are investigated. It is found that the PMs of flat‐shape and V‐shape rotors have better demagnetisation characteristics due to the reduced armature reaction influence on them.…”

Section: Introductionmentioning

confidence: 99%

Improved V‐shaped interior permanent magnet rotor topology with inward‐extended bridges for reduced torque ripple

Gao

Sun

Gerada

et al. 2020

IET Electric Power Applications

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Interior permanent magnet synchronous machines (IPMSMs) with V‐shaped permanent magnet (PM) rotors are widely used as traction motors in electric vehicles because of their high torque density and high efficiency. However, the V‐shape IPMSMs have the disadvantages of inevitable torque ripple due to the non‐sinusoidal air‐gap flux density distribution and the utilisation of the reluctance torque. In this study, with the aim of improving the torque ripple characteristics, a modified V‐shaped IPMSM rotor configuration with bridges extended inwards towards the pole centre is proposed to generate a more sinusoidal air‐gap flux density waveform. The proposed topology, referred to as ‘Type C’ within this study, is compared with baseline rotor configuration references, namely ‘Type A’ which is a conventional V‐shaped PM rotor, as well as ‘Type B’ which is a related configuration with a mechanically non‐uniform air gap. The analysis results show that the rotor ‘Type C’ exhibits significant advantages in terms of reducing cogging torque, torque ripple and radial force, without incurring additional air‐gap friction losses. Finally, a prototype of the IPMSM with the proposed rotor configuration is manufactured and tested, verifying the predicted benefits experimentally.

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Characteristics of IPMSM According to Rotor Design Considering Nonlinearity of Permanent Magnet

Cited by 23 publications

References 12 publications

Stability analysis of sensorless speed control of IPMSM

Stability analysis of sensorless speed control of IPMSM

Effect of Variable Recoil Permeability on Demagnetization Characteristics of Permanent Magnet Assisted Synchronous Reluctance Motor with Bonded Magnets

Improved V‐shaped interior permanent magnet rotor topology with inward‐extended bridges for reduced torque ripple

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