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
The energy of the leakage inductance is used to charge the output capacitance of the power semiconductors during the commutation process. This allows the semiconductors
Intro Demagnetization of permanent magnets is an intriguing subject that intersects various facets of science and engineering. Understanding this phenomenon is crucial, as it impacts the performance and longevity of
Bidirectional chargers enable EVs to function as mobile energy storage assets which can supply power back to homes, buildings, and the grid through vehicle-to-home/building (V2H/B), grid-to
This article delivers a comprehensive overview of electric vehicle architectures, energy storage systems, and motor traction power. Subsequently, it emphasizes different charge equalization methodologies
Rare earth permanent magnets are vital in various sectors, including renewable energy conversion, where they are widely used in permanent magnet generators. However, the global
In SRM drives, the motor winding needs to be magnetized and demagnetized fast for better performance at higher speeds. In this paper, the authors have proposed a power
The demagnetization analysis method of permanent magnet synchronous motor (PMSM) used in electric power steering (EPS) system is studied, and the size of perman
Heating above the Curie temperature, physical oscillation, AC demagnetization, exposure to a reverse magnetic field, and electromagnetic pulses can all achieve demagnetization. The prerequisite is to understand
battery energy storage system (BESS) for hybrid electric vehicle (HEV) applications. In the proposed drive, a battery cell and a half- bridge converter is connected as a submodule (SM),
This paper describes the use of an advanced material model for incorporating the demagnetization of permanent magnets and also discusses its effect on the overall performance of an electric motor used for electric vehicle
In this condition the stored energy is removed rapidly and the power dissipation in the power MOSFET is reduced - see equation. Figure 7a/b compares the waveforms of the normal and
This paper has reviewed various causes of demagnetization of the permanent magnet, methods to analyze demagnetization and effects of pole demagnetization on the performance of PM
There are a lot of research activities on developing techniques to detect permanent magnet (PM) demagnetization faults (DF). These faults decrease the performance,
During and after the operation, an intrinsically safe discharge circuit with an indicator rapidly dissipates the stored magnetic energy. The discharging circuit is independent of power supply,
In this study, a Multiphysics modeling methodology is developed and demonstrated on a permanent magnet electric motor. The motor design inspired by an
The influence of different PMSM demagnetization degrees on the target motor''s and powertrain''s energy efficiencies are systematically analyzed and compared.
A demagnetization device and constant power technology, which is applied in the control of generators, control systems, synchronous generators, etc., can solve the problems of low
environmentally friendly electrical infrastructure. Bidirectional chargers enable EVs to function as mobile energy storage assets, which can supply power back to homes, buildings, and the grid
Selecting proper switching converter can operate three stages in first stage magnetization (both switch ON in phase leg) the energy flow from source to load, second stage
A detailed thermal and demagnetization analysis is conducted to identify the risk of PM demagnetization during propulsion and IOBC modes.
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
While designers focus on having a high flux density in PM motors, avoidance of demagnetization is an important objective to be focused upon due to its strong impact of PM
Demagnetization of the rotor magnets is a significant failure mode that can occur in permanent magnet synchronous machines (PMSMs). Early detection of demagnetization faults can help change system
The invention discloses a method for determining the energy-storage capacitance and filter inductance and capacitance of an energy-storage demagnetization power supply, and the
General Properties of Electric Motors Operating Temperature and Cooling An electric motor''s performance, efficiency, and lifespan are greatly impacted by its operating temperature, a crucial factor to consider. As a consequence
Demagnetization in permanent magnet synchronous motor (PMSM), caused by high temperature or inverse magnetic field, may increase loss and torque ripple, and even degrade the system stability in severe
The high-capacity magnetizing and demagnetization machine is composed of a control system, a single-phase voltage doubling capacitive conversion type power supply with quasi constant
This article delivers a comprehensive overview of electric vehicle architectures, energy storage systems, and motor traction power. Subsequently, it emphasizes different
The paper justifies the validity of analyzing the impact of temperature and the process of partial demagnetization of magnets on the operating parameters of machines. To analyze this impact, a field model
Permanent magnet synchronous motor (PMSM) is widely used in new energy vehicles, aerospace, transportation, and other fields because of its simple structure, high efficiency, high power density
The demagnetizing field, also called the stray field (outside the magnet), is the magnetic field (H-field) [1] generated by the magnetization in a magnet. The total magnetic field in a region
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.
Tolerance analysis indicates that the powertrain efficiency decrease caused by motor demagnetization is more severe under urban driving conditions, especially with PEV and PHEV configurations compared with HEV. A demagnetization threshold investigation is also given in this paper.
This can take place when the magnet is subjected to fields or temperature beyond the design values. In addition, physical impact can cause demagnetization. Depending on the intensity of the incident, the magnet can either be partially or fully demagnetized.
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.
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.
Demagnetized PMSM is adopted in a pure electric vehicle (PEV), a hybrid electric vehicle (HEV) and a plug-in hybrid electric vehicle (PHEV) for energy efficiency analysis.