Device for measuring flux density value of practical air gap field of magnetic steel in electric appliance

An air-gap magnetic field and magnetic flux density technology is applied in the field of devices for measuring the actual air-gap magnetic flux density value of magnetic steel in electrical appliances. Strong and simple structure

Active Publication Date: 2010-04-28
HARBIN INST OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the measured magnetic steel is measured under the condition of magnetic open circuit, and its measurement result cannot truly reflect the magnetic flux density value of the measured magnetic steel in the air gap magnetic field (the magnetic flux density value can measure the magnetic steel magnetic flux Density dispersion), and then provides a device for measuring the actual air gap magnetic flux density value of the magnetic steel in the electrical appliance

Method used

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  • Device for measuring flux density value of practical air gap field of magnetic steel in electric appliance
  • Device for measuring flux density value of practical air gap field of magnetic steel in electric appliance
  • Device for measuring flux density value of practical air gap field of magnetic steel in electric appliance

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 , figure 2 with Figure 4 The device for measuring the actual air-gap magnetic flux density value of the magnetic steel in the electrical appliance is described in this embodiment, it includes a magnetic sensor 4, and it also includes a component for constructing the air-gap magnetic field, which is used for constructing the air-gap magnetic field The component is made of ferromagnetic material. The middle part of the component used to construct the air gap magnetic field has a channel 1-1 suitable for the size of the magnetic steel to be tested. The magnetic sensor 4 with the signal line interface is fixed on the channel 1-1. In the middle of the inner upper side wall, there is an air gap H between the upper inner side wall of channel 1-1 and the upper end surface of the magnet to be tested. The size of the air gap H is the same as the actual air gap of the magnet to be tested in the electrical appliance consistent....

specific Embodiment approach 2

[0008] Specific implementation mode two: combination figure 1 with figure 2 The device for measuring the actual air-gap magnetic flux density value of the magnetic steel in the electrical appliance is described in this embodiment, it also includes a magnetic induction detector 8, and the magnetic induction detector 8 communicates with the signal on the magnetic sensor 4 through the signal line line interface connection. The magnetic induction intensity detector 8 can quantitatively calculate the air-gap magnetic flux density value of the measured magnetic steel under the closed magnetic circuit condition, that is, the actual air-gap magnetic flux density of the electrical appliance. Embodiment 1 is the same.

specific Embodiment approach 3

[0009] Specific implementation mode three: combination figure 2 Describe the device for measuring the actual air-gap magnetic flux density value of the magnetic steel in the electrical appliance in this embodiment. The size of the air gap H is 0.4 mm to 3 mm. The other components and connections of this embodiment are the same as those in the specific embodiment One or two the same.

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Abstract

The invention discloses a device for measuring flux density value of practical air gap field of magnetic steel in electric appliance, relating to the field of magnetic property measurement. The device is used for solving the problem that when the measured magnetic steel is measured under the condition of a magnetic open circuit, a measuring result can not truly and quantificationally reflect the flux density value of the measured magnetic steel in the air gap field. In the invention, the middle part of a member for constructing the air gap field is provided with a channel, the size of the channel adapts to the size of the measured magnetic steel, an air gap is remained between the upper side wall in the channel and the upper end surface of the measured magnetic steel, the size of the air gap is consistent with the size of the air gap of the measured magnetic steel in the electric appliance, a magnetic sensor is arranged in the air gap between the measured magnetic steel and a closed magnetic loop, and the magnetic induction intensity of the magnetic sensor is worked out by a magnetic induction intensity detector. The device is used for measuring the air gap flux density value of the measured magnetic steel under the condition of the closed magnetic loop when the electric appliance is produced, and moreover, the arrangement of the magnetic steel in an electric motor or an electric appliance is optimized according to test data, thereby improving the property of the electric motor or the electric appliance.

Description

technical field [0001] The invention relates to the field of magnetic performance measurement, in particular to a device for measuring the actual air-gap magnetic flux density value of a magnet in an electrical appliance. Background technique [0002] Magnetic steel (also known as permanent magnet) is the main component of electromagnetic devices such as permanent magnet motors. Its magnetic properties have a great impact on the overall performance of the motor. On the one hand, the magnetism of the magnetic steel directly affects the output and power of the permanent magnet motor. The magnetism of the magnetic steel products will be different due to different batches, thus affecting the overall performance of the motor; on the other hand, even for the same batch of products, the magnetic properties of the magnetic steel are scattered, and sometimes the dispersion is very large, which seriously affects the performance of the motor. At the same time, the cogging torque of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R33/12
Inventor 邹继斌徐永向王骞胡建辉李勇尚静刘承军
Owner HARBIN INST OF TECH
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