Anti-interference coal mine electromechanical equipment start-stop detection method
A technology of electromechanical equipment and detection methods, applied in the direction of measuring devices, measuring magnetic variables, instruments, etc., can solve the problems of increasing the volume and weight of sensors, narrow linear range, and poor linearity, so as to reduce the workload of on-site installation and debugging, Ensure stability and reliability, improve the effect of anti-interference ability
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[0029] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.
[0030] Generally, three-core cables are mostly used in cable transmission and distribution projects of three-phase power systems below 35kV. Such as figure 1 As shown, two magnetoresistive chips are installed on the S of the cable 1 and S 2 Department, S 1 and S 2 The included angle is 120°, S 1 and S 2 The radius to the center of the cable is R, where the center of the cable is O, A, B, and C are the positions of the core wires of the cable, and the distances from the center of the cable to the core wires of A, B, and C are r 1 、r 2 and r 3 , it can be set that the y-axis coincides with OA, then the coordinates of point A are (0, r 1 ),...
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