A detection method for detecting the weak point position of motor stator insulation
A technology of motor stator and detection method, which is applied in the direction of motor generator test, measurement of electricity, measurement device, etc., can solve the problems of increasing the maintenance cost of the motor stator and the inability to achieve positioning, and achieves the goal of reducing maintenance costs, convenient supplementation, and accurate positioning. Effect
Active Publication Date: 2020-07-24
JIANGSU CRRC ELECTRIC CO LTD
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Problems solved by technology
[0004] Existing insulation detection methods can only detect the overall insulation performance of the motor stator, which cannot locate the weak (failure) position of the insulation
Therefore, in the prior art, when the insulation performance of the motor stator is detected to be poor, the motor stator can only be fully supplemented with insulating medium, which greatly increases the maintenance cost of the motor stator
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Embodiment Construction
[0013] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0014] The detection method for detecting the position of the weak point of the insulation of the motor stator provided by the invention uses a detection tool to realize the precise alignment of the weak point of the insulation of the motor stator. Such as figure 1 As shown, the detection tooling includes a moving conductive part 1 and a fixed conductive part 2 , and the moving conductive part 1 and the fixed conductive part 2 are connected via a flexible wire cable 3 .
[0015] The detailed detection steps of detection method of the present invention are as follows:
[0016] Step 1. Place the motor stator to be tested in a dry pool with a water injection port at the bottom, connect the negative terminal of the insulation resista...
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The invention provides a detection method for detecting an insulation weak point position of a motor stator. A detection tool is adopted to realize detection. The detection tool comprises a movable conducting piece and a fixed conducting piece, wherein the movable conducting piece and the fixed conducting piece are connected through a flexible wire cable. The detection method comprises the steps that the motor stator is contained in a pool, and an insulation resistance meter is connected to the motor stator; water is injected into the pool, a displayed resistance value is observed, and water injection is stopped when the displayed resistance value abruptly drops; a spray pipe is used to align to the area, close to the water surface, of the motor stator, water is sprayed on the motor statorin the circumferential direction, the displayed resistance value of the insulation resistance meter is observed, water spraying is stopped when the displayed resistance value abruptly drops, and thecurrent spraying area is marked; and the fixed conducting piece of the detection tool is connected to a stator support at the lower end of the motor stator, then the movable conducting piece of the detection tool is closely attached to the interior of the marked area to move, and an insulation weak point of the motor stator is obtained when the displayed resistance value abruptly drops again.
Description
technical field [0001] The invention relates to the field of generator detection, in particular to a detection method for detecting the position of a weak point in the insulation of a motor stator. Background technique [0002] The life expectancy requirements of medium and large motors are relatively high, which puts forward high requirements on the reliability of the motors. The insulation performance is an important evaluation index to measure the performance of the motor stator, and the quality of the insulation performance directly determines the life of the motor. [0003] At present, the insulation resistance meter is mainly used to detect the insulation performance of the motor stator. The specific detection method is to connect the negative terminal of the insulation resistance meter (usually a black clamp) to the stator bracket at the lower end of the motor stator (the stator bracket is the grounding terminal of the motor stator), and connect the positive terminal...
Claims
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IPC IPC(8): G01R31/34
CPCG01R31/346
Inventor 周迪生顾冬林李进泽车三宏于亮邓方林高丽君杨晔
Owner JIANGSU CRRC ELECTRIC CO LTD