This paper discusses methods for the torque ripple and noise reduction of DC motors for automotive air-conditioning based on electromagnetic field analysis. The target of the motor is a blower motor, and to reduce cogging torque and the torque ripple, the optimum model was selected by deforming the ...
This paper discusses methods for the torque ripple and noise reduction of DC motors for automotive air-conditioning based on electromagnetic field analysis. The target of the motor is a blower motor, and to reduce cogging torque and the torque ripple, the optimum model was selected by deforming the brush or commutator shape. In addition, to reduce the cogging torque, the model design was carried out by applying the skew method and the magnetization method of a magnet to the rotor. For optimization, the shape, material, and drive system of the motor were selected using an electromagnetic field as the analysis tool, and the method of reducing the cogging torque was applied to 4-pole, 12- and 13-slot motors considering the mechanical part. Lastly, this paper confirmed thatthemethod, which proposed how much noise, cogging torque, and vibration are reduced, improves through practical analysis.
This paper discusses methods for the torque ripple and noise reduction of DC motors for automotive air-conditioning based on electromagnetic field analysis. The target of the motor is a blower motor, and to reduce cogging torque and the torque ripple, the optimum model was selected by deforming the brush or commutator shape. In addition, to reduce the cogging torque, the model design was carried out by applying the skew method and the magnetization method of a magnet to the rotor. For optimization, the shape, material, and drive system of the motor were selected using an electromagnetic field as the analysis tool, and the method of reducing the cogging torque was applied to 4-pole, 12- and 13-slot motors considering the mechanical part. Lastly, this paper confirmed thatthemethod, which proposed how much noise, cogging torque, and vibration are reduced, improves through practical analysis.
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문제 정의
The structure of a DC motor is mechanically contacted by the brush and the commutator, resulting in noise in the DC motor[1-7]. Therefore, the aim of this paper is to propose a method of reducing the noise and vibration of DC motors by analyzing the factors affecting the mechanical noise of the DC motor[7-9]. Typical elements include the brush width, commutator width, and magnet shape (eccentricity), and this paper attempts to analyze these noise factors through the analysis of the electromagnetic field.
This paper described a study conducted on the torque ripple and noise reduction of blower motors for automotive air-conditioning. Based on the results of analyzing the torque ripple factors for the blower motor and the analysis and design of motor noise factors in terms of parallel and radical magnetization patterns for 4-pole, 12- or 13-slot motors as the electromagnetic field analysis, the cogging torque of the radical magnetization pattern was lower than parallel magnetization pattern.
제안 방법
In this paper, the cogging torque was compared by applying the skew to the core to reduce the noise and torque ripple in 12 and 13 slots from the proposed method.
The design model specifications are 4-pole, 12- and 13-slot blower motors for automotive air-conditioning, providing information on the design specifications and models. The motor models were analyzed and optimized using the analysis of electromagnetic field.
The brush width is also important, but the contact area of the brush initially contacts the corner point, and if the brush is worn afterward, the entire area of the brush will be in contact. The electromagnetic field was analyzed by 4-pole 12-and 13-slot motors, and its analysis was performed according to the direction of magnetization.
The design model specifications are 4-pole, 12- and 13-slot blower motors for automotive air-conditioning, providing information on the design specifications and models. The motor models were analyzed and optimized using the analysis of electromagnetic field. Table 1 shows the design specifications.
Typical elements include the brush width, commutator width, and magnet shape (eccentricity), and this paper attempts to analyze these noise factors through the analysis of the electromagnetic field. Therefore, the design was intended to minimize the cogging torque and torque ripple of 4-pole, 12-and13-slot blower motors for automotive air-conditioning, and the results of analyzing the cogging torque and torque ripple were compared and analyzed through the finite element method[3-5].
This paper analyzed the electromagnetic field in a parallel magnetization pattern and a radical magnetization pattern as the magnetization direction of the permanent magnet. As a result, it was confirmed that the cogging torque in the radical magnetization pattern was lower than the parallel magnetization pattern.
Therefore, the aim of this paper is to propose a method of reducing the noise and vibration of DC motors by analyzing the factors affecting the mechanical noise of the DC motor[7-9]. Typical elements include the brush width, commutator width, and magnet shape (eccentricity), and this paper attempts to analyze these noise factors through the analysis of the electromagnetic field. Therefore, the design was intended to minimize the cogging torque and torque ripple of 4-pole, 12-and13-slot blower motors for automotive air-conditioning, and the results of analyzing the cogging torque and torque ripple were compared and analyzed through the finite element method[3-5].
성능/효과
This paper described a study conducted on the torque ripple and noise reduction of blower motors for automotive air-conditioning. Based on the results of analyzing the torque ripple factors for the blower motor and the analysis and design of motor noise factors in terms of parallel and radical magnetization patterns for 4-pole, 12- or 13-slot motors as the electromagnetic field analysis, the cogging torque of the radical magnetization pattern was lower than parallel magnetization pattern. In addition, the skew method was applied to reduce the cogging torque of the motor.
It was found that the vibration was reduced. Through this study, it was confirmed that applying the skew to blower motors can produce and good performance results in the vibration area.
참고문헌 (9)
Paresh C. Sen, "Principle of Electric Machines an d Power Electronics (2nd ed), 1998
J.R. Hendershot, T.J.E. Miller, "Design of Brushless Permanent Magnet Machines", Motor Design Books LLC, 2010
EMDYNE, "JMAG", Jmag Application Note Analysis of a Permanent Magnet Brush Motor
EMDYNE, "JMAG", Jmag Application Note Basic Characteristic Analysis of a Motor with 2 Brushes, 6 Poles, and 19 Slots
EMDYNE, "JMAG", Jmag Application Note Iron Loss Analysis of a Brush Motor
Agency for Technology and Standards, 2009, "Blower motor for Automobiles", Reliability Standard, RS R 0010.
F. C. McQuiston and J. D. Parker, "Heating, Ventilating, and Air Conditioning Analysis and Design", John Wiley & Sons, Inc, 1994.
Jeong Yong Wook, Jeong Ku Sup, and Kim Seong Hoe, "Study of over current protecting apparatus for automobile blower motor", ICROS, Mar. 2010.
Agency for Technology and Standards, 2009, "Blower motor for Automobiles", Reliability Standard, RS R 0010.
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