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About BLDC Arc Magnet
Date:2023-07-24
BLDC arc magnet is a type of permanent magnet that has a curved shape. They can be found in a wide range of applications, from motors to refrigerators. It is also known as segment, ring or disc magnets. Despite their many uses, it’s important to know the different types of arc magnets. This article will discuss the different types, their advantages and disadvantages, and how they can be used.
The arc magnet is one of the most widely used types of permanent magnets for brushless direct current (BLDC) motors. This is because it reduces the cogging torque, which is the amount of magnetic force required to start the motor. This makes it a great option for high-speed applications where the motor needs to be turned on and off frequently.
In addition, arc magnets have many other benefits that make them ideal for use in a variety of applications. These include their ability to handle higher temperatures, resistance to corrosion, and lower energy consumption. They are also more durable than other types of magnets, which helps them last longer and require less maintenance.
The performance of a BLDC motor depends on several factors, including its power efficiency, output torque, and copper loss in the stator windings. The main source of these losses is the leakage flux in the air gap between the rotor and stator core. However, the leakage flux can be reduced by optimizing the arc-shaped permanent magnets.
A multi-objective optimization method is used to determine the best combination of control parameters for a AFPMBLDC with arc-shaped permanent magnets. The parameters selected for the optimization are the pole arc coefficient, permanent magnet thickness, permanent magnet arc radius, and the air-gap length. The optimum combination of parameters is determined based on the proportion analysis of the influence factor values on the optimal design objectives, such as the air-gap magnetic density, no-load back EMF, and output torque.
Several methods have been suggested to minimize the cogging torque in BLDC motors. Gonzalez et al. [1] proposed skewing the magnets on the rotor side and displacement between the stator sides for the purpose of reducing cogging torque. Breton et al. [2] recommended larger slot openings and auxiliary slots without copper winding to reduce the cogging torque in a permanent magnet-brushless DC motor.
To improve the performance of the BLDC motor, we optimize the pole arc and pole pitch using the dynamic Taguchi method and the relation analysis method. The results show that the optimized combination of pole arc, pole pitch, and magnet arc has a good performance in terms of speed, rated power, efficiency, and output torque. The optimized arc-shaped permanent magnet structure can effectively reduce the cogging torque and torque ripple of the AFPMBLDC. The analytical calculations and the coupled simulation results also confirm that the optimized arc-shaped permanent magnet structure has excellent performance. This result is helpful for improving the robustness of a BLDC motor and reducing its noise. We hope that this research can provide a useful guide for future arc-shaped permanent magnet designs.
The arc magnet is one of the most widely used types of permanent magnets for brushless direct current (BLDC) motors. This is because it reduces the cogging torque, which is the amount of magnetic force required to start the motor. This makes it a great option for high-speed applications where the motor needs to be turned on and off frequently.
In addition, arc magnets have many other benefits that make them ideal for use in a variety of applications. These include their ability to handle higher temperatures, resistance to corrosion, and lower energy consumption. They are also more durable than other types of magnets, which helps them last longer and require less maintenance.
The performance of a BLDC motor depends on several factors, including its power efficiency, output torque, and copper loss in the stator windings. The main source of these losses is the leakage flux in the air gap between the rotor and stator core. However, the leakage flux can be reduced by optimizing the arc-shaped permanent magnets.
A multi-objective optimization method is used to determine the best combination of control parameters for a AFPMBLDC with arc-shaped permanent magnets. The parameters selected for the optimization are the pole arc coefficient, permanent magnet thickness, permanent magnet arc radius, and the air-gap length. The optimum combination of parameters is determined based on the proportion analysis of the influence factor values on the optimal design objectives, such as the air-gap magnetic density, no-load back EMF, and output torque.
Several methods have been suggested to minimize the cogging torque in BLDC motors. Gonzalez et al. [1] proposed skewing the magnets on the rotor side and displacement between the stator sides for the purpose of reducing cogging torque. Breton et al. [2] recommended larger slot openings and auxiliary slots without copper winding to reduce the cogging torque in a permanent magnet-brushless DC motor.
To improve the performance of the BLDC motor, we optimize the pole arc and pole pitch using the dynamic Taguchi method and the relation analysis method. The results show that the optimized combination of pole arc, pole pitch, and magnet arc has a good performance in terms of speed, rated power, efficiency, and output torque. The optimized arc-shaped permanent magnet structure can effectively reduce the cogging torque and torque ripple of the AFPMBLDC. The analytical calculations and the coupled simulation results also confirm that the optimized arc-shaped permanent magnet structure has excellent performance. This result is helpful for improving the robustness of a BLDC motor and reducing its noise. We hope that this research can provide a useful guide for future arc-shaped permanent magnet designs.
