SU1302216A1 - Method of detecting flaws in armature winding of commutator electric machine - Google Patents

Abstract

The invention relates to instrumentation engineering and can be used to create a device for detecting defects in the windings of the electric motor collector during its production. The purpose of the invention is to increase the completeness and reliability of the control by expanding the class of detectable defects in the core winding. For this, the application of a direct current excitation effect is carried out directly on the measles. The method greatly simplifies the process of detecting defects — it allows to increase productivity and to reveal, besides the closure, defects such as wire breaks in the core winding, errors in the number of turns, and mounting errors. . The method also makes it possible to reveal the geometrical displacement of the winding. with (l oo ro

Description

. The invention relates to instrumentation engineering, in particular, to means of testing electrical machines, and can be used to create devices for detecting defects in the windings of the core of a collector electrical machine during production. .

The purpose of the invention is to increase the completeness and reliability of the control by expanding the class of detectable defects in the winding of the core.

The method of detecting defects of the winding core is carried out as follows.

Before starting the test, an inductive sensor is placed at an appropriate distance from the core. In the cortex through a fixed brush and the collector serves a constant current. For example, a coil of an electromagnetic relay can be used as a sensor. Measles are then rotated. By supplying a constant current to a rotating crust, a magnetic field appears around it, which, when the core is intact, is uniform and stationary, since the magnetized force is a core with a correct winding, the sections of which have approximately the same parameters, constant in this space. If the winding of the core is faulty (has a broken or inter-turn or interlaminar short circuit, an incorrect electrical connection or the number of turns in the sections other than the specified one), in the region of space above the faulty one

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Editor N. Tupitsa Order 12U / 45

Compiled by E. Berezov

Tehred L.Ser Dukova Proofreader A.Ilyin

Circulation 731 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., A

ten

f5

20, 35

25

thirty

 The magnetizing force of the core varies in the winding section. In a constant magnetic field core, an inhomogeneity (variable component) appears, which begins to rotate with the core. During rotation, this variable component finds a low-frequency signal in the sensor, the oscillation period of which is equal to the period of rotation of the core.

The proposed method makes it possible to simplify and significantly improve the performance of the control of the winding of the core of a collector electrical machine, as well as to detect such defects as wire breakage of the core winding, errors in the number of turns, installation errors, and geometrical winding displacements in addition to the circuit.

Claims (1)

Invention Formula A method for detecting defects of the winding of the core of a collector electric machine, consisting in that the excitation serves as a direct current, removes the control signal directly from the sensor inductively connected to the rotating core, and indicates that there are defects in the winding of the core characterized in that, in order to increase the completeness and reliability of the control, the excitation effect in the form of direct current is applied directly to measles.