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Demagnetization of lithium battery motor

Local demagnetisation analysis of a permanent magnet motor

To analyse the cause of local irreversible demagnetisation, the authors introduced an interior PMSM (IPMSM), consisting of a V-shaped magnet and concentrated winding, and performed a parameter analysis of the magnetic field based on the barrier width and magnet position considerably related to the magnetic path using the finite-element method.

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Demagnetization Analysis of Interior Permanent Magnet Machines

By decomposing the flux density of each node within the magnets along its magnetization direction, irreversible demagnetization can be accurately evaluated. Impacts

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Demagnetization and Thermal Analysis of Six-Phase Permanent

This article presents the design and optimization of six-phase surface-mounted PM (SPM) and interior PM (IPM) motors with FSCW, considering the impact of PM

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Demagnetization and Thermal Analysis of Six-Phase Permanent

This paper presents the design and optimization of six-phase surface-mounted permanent magnet (SPM) and interior permanent magnet (IPM) motors with FSCW considering the impact of PM

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Wireless Switched Reluctance Motor Drive and Energy Recovery

1 · The findings indicate that the efficiency of the motor power converter based on an individual demagnetization circuit is 10-20% superior to that of the conventional power converter. The system is capable of maintaining CC and CV characteristics under battery load conditions, thereby ensuring safe and stable battery charging. Furthermore, no

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Tolerance analysis of electrified vehicles on the motor

This paper, from an energy efficiency point of view, proposes to analyze the tolerance ability of different electrified vehicles on motor demagnetization faults, via PMSM flux

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Demagnetization Analysis of Interior Permanent Magnet

This paper investigates the demagnetization effects of charging current on magnets in interior permanent magnet machines. By using numerical analysis and circuit-coupled simulation, the demagnetization effects during integrated charging are evaluated.

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Tolerance analysis of electrified vehicles on the motor demagnetization

This paper, from an energy efficiency point of view, proposes to analyze the tolerance ability of different electrified vehicles on motor demagnetization faults, via PMSM flux density degradation modeling, efficiency estimation and dynamic programming (DP) based powertrain energy management.

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Modeling and Analysis of Demagnetization Faults in BLDC Motor

DOI: 10.1109/IECON.2019.8926825 Corpus ID: 209319782; Modeling and Analysis of Demagnetization Faults in BLDC Motor using Hybrid Analytical-Numerical Approach @article{Usman2019ModelingAA, title={Modeling and Analysis of Demagnetization Faults in BLDC Motor using Hybrid Analytical-Numerical Approach}, author={Adil Usman and Bhakti M.

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[PDF] Irreversible Demagnetization of a Large Capacity Line-Start

This paper investigates the irreversible demagnetization (ID) of a large capacity line-start permanent magnet synchronous motor (LSPMSM) considering influence of

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Demagnetization and Thermal Analysis of Six-Phase Permanent

This article presents the design and optimization of six-phase surface-mounted PM (SPM) and interior PM (IPM) motors with FSCW, considering the impact of PM demagnetization during IOBC. A detailed thermal and demagnetization analysis is conducted to identify the risk of PM demagnetization during propulsion and IOBC modes. The

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Detection of Demagnetization Faults in Electric Motors

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Demagnetization Analysis of Interior Permanent Magnet Machines

This paper investigates the demagnetization effects of charging current on magnets in interior permanent magnet machines. By using numerical analysis and circuit-coupled simulation, the

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Electromagnetic Vibration of High-Voltage Line-Start

Due to the high starting current and high temperature of the high voltage line-start permanent magnet synchronous motor, it is easy to cause partial demagnetization of the motor, which leads to increase vibration of the motor and seriously affects the operating stability of the motor. Therefore, a 10 kV, 630 kW prototype is used as an example to study the motor

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Demagnetization Fault Diagnosis of Permanent

Reliable fault diagnosis and condition monitoring are essential for permanent magnet synchronous motor (PMSM) drive systems with high-reliability requirements. PMSMs can be subject to various types of damage during

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(PDF) Demagnetization and Thermal Analysis of Six

This paper presents the design and optimization of six-phase surface-mounted permanent magnet (SPM) and interior permanent magnet (IPM) motors with FSCW considering the impact of PM...

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[PDF] Irreversible Demagnetization of a Large Capacity Line-Start

This paper investigates the irreversible demagnetization (ID) of a large capacity line-start permanent magnet synchronous motor (LSPMSM) considering influence of permanent magnets'' (PMs) temperature. The phenomenon of ID occurs on the pull-in stage and close to the cusp of magnet on the direct-axis direction. The PMs'' temperature

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Demagnetization fault detection of permanent magnet synchronous motor

In this study, the convolutional neural network (CNN) architecture of deep learning was used to diagnose a demagnetization fault that occurred in permanent magnet synchronous motors (PMSM) under stationary speed conditions. Faults in the motor increase the maintenance costs and decrease the production capacity. At first, it was tried to prevent faults

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Battery anode material mixing apparatus with demagnetization

Disclosed in the present invention is a battery anode material mixing apparatus with a demagnetization device, the apparatus comprising a shock-absorbing base, wherein a mixing chamber is disposed on the top of the shock-absorbing base; a discharge tube and a second additive inlet tube are disposed on the right side of the mixing chamber, a first additive inlet

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Demagnetization and Thermal Analysis of Six-Phase Permanent

Integrated onboard battery charger (IOBC) is an emerging technology that charges electric car battery packs using the same circuitry for electric propulsion, reducing the cost and weight of an electric vehicle (EV). During charging, while ensuring zero-average torque to avoid rotation, permanent magnets (PMs) synchronous motors with fractional slot

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A public data-set for synchronous motor electrical faults diagnosis

DOI: 10.1016/j.egyai.2023.100274 Corpus ID: 258877773; A public data-set for synchronous motor electrical faults diagnosis with CNN and LSTM reference classifiers @article{Sun2023APD, title={A public data-set for synchronous motor electrical faults diagnosis with CNN and LSTM reference classifiers}, author={Zhenglong Sun and Ram Machlev and Qianchao Wang and

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Electric vehicles, the future of transportation powered by machine

Hybrid EVs are driven by a fusion of a conventional gasoline engine and an electric motor. Contrary to PHEVs, HEVs do not have the capability to be plugged in for battery charging. Instead, the battery that powers the electric motor is charged by the gasoline engine and by the energy generated during braking. The fourth generation of the Toyota Prius hybrid

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Demagnetization and Thermal Analysis of Six-Phase Permanent

This paper presents the design and optimization of six-phase surface-mounted permanent magnet (SPM) and interior permanent magnet (IPM) motors with FSCW considering the impact of PM demagnetization during IOBC. A detailed thermal and demagnetization analysis is conducted to identify the risk of PM demagnetization during propulsion and IOBC modes.

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Demagnetization Analysis of Interior Permanent Magnet

By decomposing the flux density of each node within the magnets along its magnetization direction, irreversible demagnetization can be accurately evaluated. Impacts from both the pulsating and rotating demagnetization magnetic fields during the IBC operation are assessed and compared.

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(PDF) Demagnetization and Thermal Analysis of Six-Phase

This paper presents the design and optimization of six-phase surface-mounted permanent magnet (SPM) and interior permanent magnet (IPM) motors with FSCW considering the impact of PM...

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Technology trends, challenges, and opportunities of reduced-rare

Considering that the S-PMA-SynR motor usually operates under large demagnetization current the demagnetization risk of assisted-PMs is relatively high, it is necessary to improve the anti-demagnetization ability of S-PMA-SynR motors [88]. Since the outer assisted-PMs are susceptible to demagnetization currents, the outer barrier and

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Local demagnetisation analysis of a permanent magnet

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Detection of Demagnetization Faults in Electric Motors by

In this motor design, the demagnetization of seven magnets (CD2) results in a spectral behavior of the investigated voltages and currents that closely resembles that of an undamaged motor, leading to poor anomaly detection performance. Analyzing the EMF amplitude could be a more effective approach for identifying this specific fault

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Everything Anglers Should Know about Lithium Marine Batteries

It will cycle a charge in my trolling motor batteries and have them ready to go in an hour or two. It''s crazy how fast these things charge. Lithium battery chargers work exactly the opposite of conventional chargers. Most conventional chargers are waiting for an input from the battery of usually at least 8 volts. Whereas a lithium charger is

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Demagnetization of lithium battery motor [PDF]

6 FAQs about [Demagnetization of lithium battery motor]

How does demagnetization affect motor efficiency?

This means that higher motor speed areas start to be affected by the demagnetization. As the demagnetization level continues to be higher in Fig. 5 (e-f), the 0–1000 rpm low speed area suffers a maximum of 15% motor efficiency reduction. Whereas at the 5000–6000 rpm high speed area, the efficiency reductions are all less than 5%.

What happens if the motor demagnetization is 40%?

When the motor demagnetization is 40%, the maximum fuel increase is about 30%, which is 10% higher than the HEV case. The fuel performance under 20% demagnetization is also worse, with an 11% increase at top. Different driving cycles might perform different results.

Does demagnetization increase electricity consumption?

The total electricity consumption rises by maximum 30% when 40% demagnetization occurs. When the demagnetization is under 20%, the electricity consumption increase is less than only about 8%. The same NEDC driving cycle is used to test the HEV energy efficiency performance with different demagnetization levels, as shown in Fig. 7.

What causes demagnetization fault in permanent magnet synchronous motors (PMSMs)?

Due to possible overheat, abrasion or mechanical vibrations, demagnetization fault is inevitable in permanent magnet synchronous motors (PMSMs), which could greatly decrease the motor’s efficiency and hence an electrified vehicle’s performance.

How to understand motor efficiency variation when demagnetization fault happens?

In order to better understand the motor efficiency variation when demagnetization fault happens, various experiments have been conducted to imitate demagnetization. Most of them use permanent magnet demolition method to achieve this target.

Can a simulated demagnetization fault cause efficiency reduction?

The simulated demagnetization faults can only cause about 5% efficiency reduction even when the demagnetization is as bad as 40% at the 3000–6000 rpm operating area. When the motor operates under 2000 rpm, the efficiency reduction is great and is nearly linear to the demagnetization degree.

Demagnetization of lithium battery motor

6 FAQs about [Demagnetization of lithium battery motor]

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