SU410345A1 - - Google Patents

Description

one

The invention relates to the field of magnetic measurements, in particular for monitoring the quality of the manufacture of toric cores with nazamn.

Known methods for testing cores with grooves are used in the manufacture of electrical machines. However, for ethnh testing, it is necessary to have spienically manufactured equipment for the nontrivial control of individual parts of the core, which leads to a great complexity of the tests.

The aim of the invention is to reduce the labor intensity and increase the reliability of quality control of core preparation.

This is achieved by using the same core with the measuring and magnetizing windings applied to it for a series of measurements, combining the surfaces of the tooth zones of the specified core with. With each of the cores being tested, an alternating current is fed into the magnetic field and the winding, the resulting notternes in the cores are measured, after which the losses in the wrapped core are excluded from the resulting losses.

The scheme of the control measurements in the same way is given in the drawing, where the cores are presented in expanded form on the plane.

The method implies the presence of a constant (reference) core 1, having one, its distribution distributed in the slots of the magnetizing winding, and the measuring windings. The magnetizing winding is connected to the alternating voltage source 2 with the specified test frequency.

measurements, and measuring winding to measuring devices 3, a voltmeter and wattmeter. Winding can be performed in a core similar to the subject. Magnetizing winding yut. So,

so that each secant winding covers the value of the zero division of a series of recognizable cores, and two adjacent sections are included in opposite directions relative to each other. The measuring winding is made distributed in the same directions as the magnetizing winding. The number of turns of the windings is selected in accordance with the size of the cores.

To determine the resulting losses

All tested cores 4 but one at a time are combined with a reference core on line 5, which represents a trace of the surfaces of the tooth zones. After that, resultant notterns in the reference and istable cores are intended. From the sum of losses, the notional value of the notions in the reference core is deducted. Onnsan procedure of torping cores does not require additional equipment. In addition, the total loss of the entire core is measured immediately, which simplifies,

accelerates testing. Measurements using this method are easily automated.

Subject invention

The method of quality control of the production of end cores with grooves by measuring losses, characterized in that, in order to reduce the complexity of monitoring and increase measurement reliability, the same core with applied magnetizing and measuring windings is combined for a series of measurements the specified core with each of the tested cores, serves alternating current in the magnetizing winding, measure the resulting losses in the cores, from which the resulting losses exclude losses in the wound core.