Method for measuring magnetic induction intensity of two-dimensional magnetic field
A technology of magnetic induction intensity and two-dimensional magnetic field, applied in the direction of the size/direction of the magnetic field, which can solve the problems of strict requirements, high cost and inapplicability of the measurement system, and achieve the effect of simple manufacturing process and low cost.
Inactive Publication Date: 2014-08-13
HARBIN ELECTRIC MASCH CO LTD
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Problems solved by technology
Firstly, the manufacturing process of the traditional Hall probe is complicated, the requirements for the measurement system are strict, and the cost is high; secondly, it is not suitable for the simultaneous test of the multi-point magnetic field inside the motor
At present, there is no small two-dimensional magnetic field magnetic induction intensity magnetic measuring element suitable for testing the magnetic field at the end of the air-cooled turbogenerator.
Method used
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[0026] Such as figure 1 As shown, the structural diagram of the two-dimensional magnetic field magnetic induction intensity magnetic measuring element. Use insulating bakelite to make a central cube, and the center positions of the central cube in the x and y directions are respectively provided with positioning taper holes, and then use insulating bakelite to make 2 skeletons wound with coils and positioning taper pins, and the skeleton is equipped with positioning taper pins , used to locate the two magnetic measuring coils in the x and y directions, use Φ0.05mm enameled wire to wind two coils of 400 turns each on the two skeletons, both the magnetic measuring coils in the x and y directions, the coil winding After the completion, it is calibrated, and the magnetic measuring coil is placed in the calibration area where the constant standard magnetic field is known, and the FM-1 type magnetic flux integrator is used to calibrate it, and the two coil calibration constants in t...
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Provided is a method for measuring the magnetic induction intensity of a two-dimensional magnetic field. Two magnetism measuring coils are bonded to a center cubic body through an adhesive in the x direction and the y direction respectively. When a magnetism measuring element is used for measuring the magnetic induction intensity of a certain position, the induction potentials and frequencies of the two magnetism measuring coils in the x direction and the y direction are measured, and the magnetic induction intensity of the point position in the x direction and the y direction and the amplitude value and phase position of a magnetic induction intensity vector of the point position are finally determined through calculation by means of formulas (1), (2), (3) and (4).
Description
Technical field: [0001] The invention relates to a method for testing the magnetic induction intensity of a two-dimensional magnetic field. Background technique: [0002] With the rapid development of the generator industry, the capacity of air-cooled turbogenerators is constantly increasing, and the heating of the stator core and end structural parts caused by the magnetic field at the end of large generators has become an important factor that endangers the normal operation of generators. . Magnetic induction is the basic physical quantity of magnetic field properties, and the high or low magnetic induction is directly related to the heating of structural parts. Therefore, the test and research of the magnetic field at the end of the generator is of great significance in both production and scientific research. At present, it is still difficult to test the magnetic induction intensity of two-dimensional magnetic field. The existing methods of measuring magnetic field mai...
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IPC IPC(8): G01R33/02
Inventor 富立新苟智德刘宇王磊李明宇韩毅魏长健王立国王春梅
Owner HARBIN ELECTRIC MASCH CO LTD