A detection system and detection method for an air gap eccentric fault of an induction motor
A technology of induction motor and detection system, applied in the field of detection, can solve the problems of difficult to distinguish, difficult to identify various types of eccentricity, uneven axial direction, etc.
Active Publication Date: 2016-06-01
HEFEI UNIV OF TECH
View PDF4 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, although these methods are simple and fast in signal extraction, it is difficult to completely identify various types of eccentricity, especially the problem of axial uneven eccentricity
And it is similar to the detection signal of other fault phenomena such as broken rotor bars, and sometimes it is difficult to distinguish
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] Such as figure 2 with image 3 As shown, the detection system of the induction motor air gap eccentricity fault of this embodiment is to arrange the magnetic field detection coil array on the same circumferential surface inside the stator core 7. The distribution of the magnetic field detection coils 5 in the magnetic field detection coil array is: The magnetic field detection loops are arranged in the vertical position, and the magnetic field detection coils in the magnetic field detection loop are arranged at intervals. The number of magnetic field detection coils between adjacent magnetic field detection loops is equal, and they are on the same parallel line of the axis in one-to-one correspondence; magnetic field detection coils The lead wire 6 is connected to the junction box 4 of the induction motor; the output end of the junction box 4 is connected to the input end of the lower computer 2, and the output end of the lower computer 2 is connected to the input end of ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses an induction motor air-gap eccentric fault detection system and detection method. The detection system is characterized in that magnetic field detection coil arrays are distributed on the same circumference face on the inner side of a stator iron core in the following mode. The distribution mode includes the steps that all magnetic field detection rings are arranged at different axial positions, all magnetic field detection coils in the magnetic field detection rings are arranged at intervals, the numbers of the magnetic field detection coils in the adjacent magnetic field detection rings are the same, and the magnetic field detection coils are located on the same parallel lines of the axis in one-to-one correspondence; leads of the magnetic field detection coils are connected into a junction box of an induction motor; the output end of the junction box is connected into the input end of a lower computer, and the output end of the lower computer is connected into the input end of an upper computer. By analyzing and comparing magnetic field signal characteristics, the air-gap eccentric fault type of the induction motor is accurately judged. With the system and method, axial uniform eccentricity can also be effectively detected, and the minimum air gap can be judged out roughly.
Description
Technical field [0001] The invention relates to a method for diagnosing the type and degree of eccentricity of the complicated air gap eccentricity of an induction motor by using the magnetic field signal of the tooth portion of the stator iron core, and belongs to the technical field of detection. Background technique [0002] The eccentricity of the air gap of a rotating electric machine is a phenomenon in which the length of the radial air gap between the stator and the rotor is not uniform, and it exists more or less in almost all electric machines. According to the uneven distribution characteristics, air gap eccentricity can be divided into two basic types: uniform axial eccentricity (static eccentricity, dynamic eccentricity, mixed eccentricity) and uneven axial eccentricity (oblique eccentricity, arc eccentricity), such as figure 1 Shown. There are many reasons for the eccentricity of the air gap, such as manufacturing and installation errors, bearing wear, shaft bending,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/34
Inventor 鲍晓华吕强方勇王汉丰程志恒李福英
Owner HEFEI UNIV OF TECH