SU747443A3 - Device for measuring magnetic flux of multi-phase ac electric machine - Google Patents

Device for measuring magnetic flux of multi-phase ac electric machine Download PDF

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Publication number
SU747443A3
SU747443A3 SU762426150A SU2426150A SU747443A3 SU 747443 A3 SU747443 A3 SU 747443A3 SU 762426150 A SU762426150 A SU 762426150A SU 2426150 A SU2426150 A SU 2426150A SU 747443 A3 SU747443 A3 SU 747443A3
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SU
USSR - Soviet Union
Prior art keywords
stator
winding
measuring
magnetic flux
core
Prior art date
Application number
SU762426150A
Other languages
Russian (ru)
Inventor
Кжымински Лэон
Овчарска Мариа
Рудэньски Анджей
Патоцки Аркадиуш
Original Assignee
Институт Электротехники (Инопредприятие)
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Publication of SU747443A3 publication Critical patent/SU747443A3/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
  • Measuring Magnetic Variables (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

A method of measuring the magnetic flux in the stator of a thin phase electric machine uses an auxiliary ring shaped lamination with its own auxiliary winding embedded in the stator of the machine. The specialized lamination of the measurement device consists of a ring shaped core (2) carrying yokes (3) which match the remaining stator laminations (1). An auxiliary winding (4) is wound round the outer section of this lamination using a ring shaped cavity left in the stator for this purpose. The alternating voltage generated in this winding may be rectified and smoothed to produce an indication of the magnetic flux in the stator. A developed version uses two serially connected windings and another short circuited winding which reduces certain unwanted induced voltages.

Description

ную в пространстве между листами статора , смежными с зондомjзаполненном вырезками 7, блокирующими зубь  3 зонда.in the space between the stator sheets adjacent to the probe filled with notches 7, blocking the teeth of the 3 probes.

Принцип действи  зонда основан на  влении магнитного насьицени  в  рме зонда, представл ющего собой часть сердечника статора. Магнитный поток, возбуждаемый в  рме 2 намагничивающими витками машины, не сцеплен с измерительной обмоткой 4, а лишь подмагНичивает  рмо 2. Обмотка 4 питаетс  переменным напр жением с частотой, большей-максимальной рабочей частоты двигател . Напр жение,пропорциональное среднему значению рабочего магнитного потока машины, получаетс  путем использовани  зависимости между п 5 током, подмагничиваиоЕдим  рмо 2, и eto импедансом. Изменение импеданса зонда преобразуетс  в переменный сигнал с частотой измерительного напр жени . Этот сигнал после выпр млени  и С1 ла5кивани  можно использовать дл  стабилизировани  магнитного потока машины.The principle of operation of the probe is based on the appearance of a magnetic nasicene in the tube of the probe, which is part of the stator core. The magnetic flux, excited in rme 2 by the magnetizing coils of the machine, is not coupled with the measuring winding 4, but only magnifies the rm 2. The winding 4 is supplied with alternating voltage with a frequency greater than the maximum operating frequency of the engine. A voltage proportional to the average value of the working magnetic flux of the machine is obtained by using the relationship between the n 5 current, the bias and the PMO 2, and this impedance. The change in the impedance of the probe is converted to an alternating signal at the frequency of the measuring voltage. This signal after straightening and C1 forging can be used to stabilize the magnetic flux of the machine.

Зонд, состо щий из одного измерительного сердечника, требует разрыва посредством изол ционных элементов электрической цепи, состо щей из станины, подшипниковых щитов, подшипников и вала. Это необходимо дл  предотвращени  возникновени  в этой цепи электринеских токов измерительной частоты . В зонде с двум  измерительными сердечниками, обмотки 4 которых соединены встречно, рекомендуетс  применение экранирук дей короткозамкнутой обмотки 5. Это ликвидирует неравномерность магнитных свойств измерительных сердечников и позвол ет примен ть машину без изол ционных элементов.A probe consisting of a single measuring core requires breaking through the insulating elements of an electrical circuit consisting of a bed, bearing shields, bearings and a shaft. This is necessary to prevent electrical currents of measuring frequency from occurring in this circuit. In a probe with two measuring cores, the windings 4 of which are connected in opposite directions, the use of shielded windings of the short-circuited winding 5 is recommended. This eliminates the non-uniformity of the magnetic properties of the measuring cores and allows the use of a machine without insulating elements.

Claims (4)

1.Устройство дл  измерени  магнного потока многофазной электрической машины переменного тока, содержщее зонд с измерительной обмоткой, отличающеес  тем, что, целью упрсхцени  устройства и повышени  его точности путем исключени  зависимости измерени  от частоты напр жени  питани  двигател , зонд выполнен в виде сердечника из по крайней мере одного листа пакета статора с наружным диаметром, меньшим диаметра листов пакета статора1. A device for measuring the magnetic flux of a multi-phase AC electric machine, comprising a probe with a measuring winding, characterized in that the purpose of controlling the device and improving its accuracy by eliminating the dependence of the measurement on the frequency of the motor supply voltage, the probe is made in at least measure one sheet of stator pack with an outer diameter smaller than the diameter of the stator pack sheets и с глубиной пазов, большей глубины пазов листов пакета статора, при этом измерительна  обмотка равномерно распределена по всей окружнос  рма сердечника.and with a depth of grooves greater than the depth of the grooves of the sheets of the stator packet, while the measuring winding is evenly distributed over the entire circumference of the core of the core. 2.Устройство по П.1, отличающеес  тем, что измерителна  обмотка расположена на части окружности  рма сердечника, соответствующей одной паре полюсов.2. A device according to Claim 1, characterized in that the measuring winding is located on the part of the circumference of the core frame corresponding to one pair of poles. 3.Устройство по пп. 1, 2, отличающеес  тем, что зонд выполнен из двух сердечников со встречно соединенными измерительными обмотками.3. The device according to paragraphs. 1, 2, characterized in that the probe is made of two cores with counter-connected measuring windings. 4.Устройство по п.З, отличающеес  тем, что по всей окружности  рма двух сердечников равномерно расположена экранирующа  короткозамкнута  обмотка.4. A device according to Clause 3, characterized in that a shielded short-circuited winding is evenly positioned along the entire circumference of the core of the two cores. Источники информации, прин тые во внимание при экспертизеSources of information taken into account in the examination 1. Акцептованна  за вка Англии 1270591,кл. Н 02 К 1/06,12.04.72 (прототип).1. Accepted for England of England 1270591, cl. H 02 K 1 / 06,12.04.72 (prototype).
SU762426150A 1975-12-17 1976-12-10 Device for measuring magnetic flux of multi-phase ac electric machine SU747443A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL18565775A PL105294B1 (en) 1975-12-17 1975-12-17 PROBE FOR MEASURING THE MAGNETIC FLOW OF A MULTIPHASE ELECTRIC MACHINE ALTERNATING CURRENT

Publications (1)

Publication Number Publication Date
SU747443A3 true SU747443A3 (en) 1980-07-23

Family

ID=19974773

Family Applications (1)

Application Number Title Priority Date Filing Date
SU762426150A SU747443A3 (en) 1975-12-17 1976-12-10 Device for measuring magnetic flux of multi-phase ac electric machine

Country Status (5)

Country Link
JP (1) JPS5274375A (en)
CA (1) CA1066361A (en)
DE (1) DE2655464A1 (en)
PL (1) PL105294B1 (en)
SU (1) SU747443A3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4230961A (en) * 1978-09-12 1980-10-28 Westinghouse Electric Corp. Magnetic flux sensor for laminated cores

Also Published As

Publication number Publication date
PL105294B1 (en) 1979-10-31
CA1066361A (en) 1979-11-13
DE2655464A1 (en) 1977-06-30
JPS5274375A (en) 1977-06-22

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