Влияние места расположения намагничивающих обмоток преобразователя на гармонический состав поля
Дата
2019
DOI
10.20998/2079-3944.2019.1.06
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Назва журналу
Номер ISSN
Назва тому
Видавець
НТУ "ХПИ"
Анотація
В данной работе рассмотрен первичный электромагнитный преобразователь с неоднородным зондирующим полем структура которого представлена в виде пространственно-периодических гармоник. Для исключения влияния на результат измерения высших гармоник и выделения необходимых информативных гармоник предложено несколько различных систем намагничивающих полюсов преобразователя что позволило выделят необходимые сочетания четных или нечетных гармоник выходного сигнала преобразователя и повысило точность многопараметрового контроля электрических, магнитных и геометрических параметров исследуемых изделий. Выполнен расчет и показано влияние высших гармоник поля на выходные сигналы в измерительных обмотках преобразователя.
In this paper, we consider a primary electromagnetic transducer with an inhomogeneous probe field whose structure is represented as spatially periodic harmonics. The number different systems of magnetizing poles of the transducer was proposed in order to eliminate the higher harmonics effect on the measurement result and to highlight the required informative harmonics. This made it possible to select necessary combinations of even or odd harmonics of the transducer’s output signal and to increase the accuracy of the multi-parameter control of the products under study. It was performed calculation and the effect of the field higher harmonics on the output signal in the transducer’s measuring windings was shown. It was proposed to estimate the value of the error caused by other harmonics elimination when calculating as the ratio of the first harmonic amplitude to the algebraic sum of the EMF of this eliminated and accounted harmonics. It was established that for a transducer with one exciting winding, elimination the third harmonic results in an error calculation of the resulting EMF of 5%, and the calculation error for a transducer with two exciting windings associated with elimination of the fifth harmonic is 1.5%.
In this paper, we consider a primary electromagnetic transducer with an inhomogeneous probe field whose structure is represented as spatially periodic harmonics. The number different systems of magnetizing poles of the transducer was proposed in order to eliminate the higher harmonics effect on the measurement result and to highlight the required informative harmonics. This made it possible to select necessary combinations of even or odd harmonics of the transducer’s output signal and to increase the accuracy of the multi-parameter control of the products under study. It was performed calculation and the effect of the field higher harmonics on the output signal in the transducer’s measuring windings was shown. It was proposed to estimate the value of the error caused by other harmonics elimination when calculating as the ratio of the first harmonic amplitude to the algebraic sum of the EMF of this eliminated and accounted harmonics. It was established that for a transducer with one exciting winding, elimination the third harmonic results in an error calculation of the resulting EMF of 5%, and the calculation error for a transducer with two exciting windings associated with elimination of the fifth harmonic is 1.5%.
Опис
Ключові слова
вихретоковый измерительный преобразователь, пространственно-периодическая структура поля, неразрушающий контроль, цилиндрические металлические изделия, non-destructive testing, spatial-periodic field structure, cylindrical metal products
Бібліографічний опис
Влияние места расположения намагничивающих обмоток преобразователя на гармонический состав поля / Б. М. Горкунов [и др.] // Вісник Національного технічного університету "ХПІ". Сер. : Проблеми удосконалювання електричних машин і апаратів. Теорія і практика = Bulletin of the National Technical University "KhPI". Ser. : Problems of electrical machines and apparatus perfection. Theory and practice : зб. наук. пр. – Харків : НТУ "ХПІ", 2019. – № 1. – С. 31-35.