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相关概念视频

Torque On A Current Loop In A Magnetic Field01:13

Torque On A Current Loop In A Magnetic Field

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The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...
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Magnetic Field Due to Two Straight Wires01:18

Magnetic Field Due to Two Straight Wires

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Consider two parallel straight wires carrying a current of 10 A and 20 A in the same direction and separated by a distance of 20 cm. Calculate the magnetic field at a point "P2", midway between the wires. Also, evaluate the magnetic field when the direction of the current is reversed in the second wire.
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Magnetic Field Of A Current Loop01:16

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Consider a circular loop with a radius a, that carries a current I. The magnetic field due to the current at an arbitrary point P along the axis of the loop can be calculated using the Biot-Savart law.
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Magnetic Field Due To A Thin Straight Wire01:28

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Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.
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Magnetic Field of a Solenoid01:18

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A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
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Magnetic Force On Current-Carrying Wires: Example01:22

Magnetic Force On Current-Carrying Wires: Example

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In a magnetic field, moving charges encounter a force. If a wire contains these moving charges, i.e., if the wire is carrying a current, then a force acts on the wire as well. Consider a pair of flexible leads holding a wire that is 40 cm long and 10 g in weight in a horizontal position. The wire is placed in a constant magnetic field of 0.40 T, as shown in Figure 1(a). Determine the magnitude and direction of the current flowing in the wire needed to remove the tension in the supporting leads.
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A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
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基于稳定状态漫游流量信号的断裂转子杆检测,使用具有随机定位的三轴传感器.

Marko Zubčić1, Ivan Pavić1, Petar Matić1

  • 1Faculty of Maritime Studies, University of Split, Ruđera Boškovića 37, 21000 Split, Croatia.

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概括

使用三轴传感器的新方法检测了感应电机中断转子杆 (BRB) 故障. 这种方法是有效的,一致的,并且从统计学上区分健康的与故障的电机.

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科学领域:

  • 电气工程 电气工程
  • 机械工程 机械工程
  • 状态监控 状态监控

背景情况:

  • 松鼠感应电机在工业应用中至关重要.
  • 断裂的旋转杆 (BRB) 故障可能导致电机故障和运行停机时间.
  • 早期发现BRB故障对于预测性维护至关重要.

研究的目的:

  • 研究一种用于检测感应电机中断裂转子杆 (BRB) 故障的新方法.
  • 评估三轴传感器测量技术的有效性和一致性.
  • 在统计学上区分健康和BRB故障的电机.

主要方法:

  • 一个三轴传感器被随机放置在两个感应电机的表面 (一个健康的,一个与BRB故障).
  • 诱导电机力是在10天 (100次测量/天) 记录的.
  • 应用了统计分析,包括正常性测试和参数/非参数方法.

主要成果:

  • 测量方法证明是有效的,并且随着时间的推移而保持一致.
  • 该技术在设置一个值时,从统计学上区分健康的电机和具有BRB缺陷的电机.
  • 定量分析显示,与健康和BRB故障电机相比,健康电机之间的差异较小.

结论:

  • 拟议的三轴传感器定位方法是BRB故障检测的可靠方法.
  • 统计分析证实了该方法能够区分电机条件.
  • 这种技术支持了感应电机的有效状态监测和预测性维护策略.