WO2002039128A1 - Procede et appareil d'essai d'isolement non destructeur destines a une machine electrique de petite taille - Google Patents

Procede et appareil d'essai d'isolement non destructeur destines a une machine electrique de petite taille Download PDF

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Publication number
WO2002039128A1
WO2002039128A1 PCT/JP2001/009785 JP0109785W WO0239128A1 WO 2002039128 A1 WO2002039128 A1 WO 2002039128A1 JP 0109785 W JP0109785 W JP 0109785W WO 0239128 A1 WO0239128 A1 WO 0239128A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric machine
small electric
coil
test
corona
Prior art date
Application number
PCT/JP2001/009785
Other languages
English (en)
Japanese (ja)
Inventor
Masahiro Tsubokawa
Original Assignee
Matsushita Electric Industrial Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Priority to KR1020037006293A priority Critical patent/KR100705121B1/ko
Publication of WO2002039128A1 publication Critical patent/WO2002039128A1/fr

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Classifications

    • 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
    • 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
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing

Definitions

  • the present invention relates to a test method and an apparatus for detecting a defect in an insulating state between a winding part such as a small motor and a laminate core in a non-destructive state and detecting the defect with very high sensitivity.
  • the insulation between the winding and the laminated core is broken, and the main cause of the life is that the winding magnet wire and insulators (film, resin, etc.) Magnet wire and laminated cores due to cracks, scratches, pinholes, etc. caused by impact, mechanical pressure, friction, etc. given by any machine or jig during the wire process or assembling process as a motor
  • the winding magnet wire and insulators film, resin, etc.
  • Magnet wire and laminated cores due to cracks, scratches, pinholes, etc. caused by impact, mechanical pressure, friction, etc. given by any machine or jig during the wire process or assembling process as a motor
  • dielectric breakdown so-called ground short-circuit
  • abnormal current such as short-circuit current to flow and heating and burning the winding This is what you'll want to do.
  • methods for inspecting the insulation state include an AC withstand voltage test, an insulation resistance test, a partial discharge measurement test, a surge test, a reduced pressure surge test, a pinhole test, and a visual sensory test.
  • AC withstand voltage test an insulation resistance test
  • partial discharge measurement test a surge test
  • reduced pressure surge test a reduced pressure surge test
  • pinhole test a visual sensory test
  • the partial discharge measurement test is a measurement of the partial discharge.
  • the magnet wire contacts the laminating core, it can be detected with extremely high sensitivity. This determines whether a partial discharge occurs between the coil and the laminated core through the insulating film of the magnet wire, so it is not possible to detect the phenomenon that a healthy magnet wire is slightly separated from the laminated core It is.
  • only the partial discharge generation start voltage changes, and its detection ability does not change.
  • the surge test is effective in detecting layer shorts caused by coil flaws adjacent to the coil and coil, in addition to the coil flaws being in contact with the laminated core, but has limited detection of coil flaws.
  • the pressure-reduction surge test has a very high detection power for detecting a lay short caused by adjacent coil scratches between coils and detecting coil scratches, but a phenomenon in which a sound magnet wire comes into contact with or approaches a laminate core. Is undetectable.
  • the pinhole test involves completely immersing the sample in a saline solution + phenolphthalene solution. Although coil wounds are detected, this test is a destructive test and cannot be 100% tested.
  • the visual sensory inspection is performed during the winding process and the motor assembly process, but it is an inspection of the surface only, and there are many places that cannot be seen. Effect cannot be expected.
  • the conventional test method for inspecting the insulation state as described above uses the high sensitivity, mass production process, and the phenomenon that the magnet wire abnormally approaches the laminate core and causes the dielectric breakdown during operation in the near future. However, it is not satisfactory to perform a 100% inspection, and there are the following problems (a) and (b).
  • the conventional test method is to detect a state of poor quality (when there is a coil flaw in the magnet wire or when the magnet wire comes into direct contact with the laminate core), and a healthy magnet wire and the laminate core approach abnormally. It is not possible to detect the condition.
  • the present invention solves the above-mentioned conventional problems, and a non-destructive inspection is performed to detect a defective portion where a sound winding coil has abnormally approached (within 1 mm) the laminating core. It is an object of the present invention to provide an insulation test method and apparatus capable of 100% inspection in a mass production process. Disclosure of the invention
  • the present invention provides a non-destructive insulation test method for a small electric machine having a coil, wherein a pressure inside a container storing the small electric machine is set to a reduced pressure atmosphere, and a high frequency voltage is applied to a coil of the small electric machine. And a step of detecting whether or not corona discharge is generated from the small electric machine.
  • the method comprises the steps of: applying a high-frequency voltage between the winding coil and the laminated core; The pass / fail judgment is made based on the corona pulse which increases when 0 to 110 V is applied.
  • the present invention provides a first step of storing a small electric machine having a coil in a container, a second step of reducing the pressure in the container, a third step of applying a high-frequency voltage to the coil, and the small electric machine.
  • a non-destructive insulation test method for a small electric machine having a coil characterized by comprising a fourth step of determining whether or not a corona discharge has occurred from the coil. It has the effect of being able to
  • the present invention also provides a non-destructive insulation test apparatus for a small electric machine having a coil, a container for accommodating the small electric machine, a decompression device for evacuating the inside of the container to a reduced pressure atmosphere, and applying a high-frequency voltage to the coil.
  • a non-destructive insulation test device comprising: a high-frequency power source to be applied; and a high-frequency corona measuring device that detects whether corona discharge is generated from the small electric machine. It has the effect that corona discharge can be generated by voltage.
  • FIG. 1 shows a non-destructive insulation test apparatus of the present invention.
  • FIG. 2 shows a circuit configuration of the present invention.
  • FIG. 3 shows the corona generation starting voltage in the test mode (good) according to one embodiment of the present invention.
  • FIG. 4 shows the start of corona generation at a failure phenomenon portion of the test motor according to one embodiment of the present invention.
  • FIG. 5 shows a corona pulse generation frequency according to an embodiment of the present invention.
  • FIG. 1 shows an embodiment of the non-destructive insulation test method of the present invention.
  • 1 is a test mode (small electric machine)
  • 2 is a decompression tank (vessel)
  • 3 is a high-frequency corona measuring device
  • 4 is a vacuum gauge
  • 5 is a valve
  • 6 is a vacuum pump
  • 7 is a pushing
  • 8 is Yuichi Minaru.
  • test mode 1 Under the atmospheric pressure, the test mode 1 is stored in the decompression tank 2, the test mode 1 is relayed to the terminal 8, passes through the pushing 7, and is connected to the lead wire of the motor winding coil.
  • the decompression device is composed of a vacuum pump 6, a valve 5, and a vacuum gauge 4.
  • the degree of decompression in the decompression tank 2 is controlled by the vacuum gauge 4 and reduced to a predetermined degree by the vacuum pump 6 via the valve 5. Is done.
  • the optimal degree of decompression of the decompression tank 2 is 65 to 20 O T O r rr by experiments, and decompression management should be performed according to the type of the DUT (test sample 1).
  • the high-frequency voltage generated by the high-frequency power supply in the high-frequency corona measuring device 3 is guided by a high-voltage cable, applied to the coil of the motor 1 through the lead wire, and gradually increases the applied voltage. Corona discharge occurs between the wire and the laminate core. Corona discharges generated in the windings (magnet wires) of small electric machines can be broadly divided into (1) discharges generated through insulators (film, resin, etc.) between the magnet wires and the laminated core, ( 2) There is a discharge generated between the magnet wire and the laminating core through the air insulation.
  • Phenomenon (1) is a phenomenon in which the dielectric constant of the insulator is higher than that of (2) and the corona generation starting voltage is low, and the phenomenon occurs early. It was difficult.
  • phenomenon (2) has a high probability of failure in the future due to electrical, mechanical, thermal, and scientific factors, and must be determined and detected in advance.
  • a high-frequency power supply (1 to 40 kHz) should be used for this task. This is because the impedance (Z) of a small electric machine having a coil is (1 / coC). By increasing the power supply frequency ( ⁇ ), the impedance is reduced and the amount of charge flowing in the winding is reduced. By increasing the voltage, it became possible to generate corona discharge at a low voltage at the defective part.
  • the corona pulse frequency in (2) was found to increase near 1.5 MHz by experiments, and a single-pass filter (500 kHz) and a high-pass filter were used. Judgment and detection can be realized by means for forming a band-pass filter using a combination of filters (2 MHz).
  • Fig. 3 shows the relationship between the voltage at which corona discharge occurs from the entire test motor and the degree of vacuum
  • Fig. 4 shows the distance between one magnet wire of the test motor winding and the laminated core of 0.3 mm. The relationship between the corona generation starting voltage and the degree of vacuum at the failure reproduction location is shown.
  • the meaningless corona discharge generated from the whole motor under test especially the corona discharge generated through the slot insulating paper
  • the significant corona discharge generated at the defective part are shown. Need to be distinguished.
  • the voltage generated by the high-frequency power supply 50 (high-frequency power supply whose sinusoidal signal whose frequency can be varied from 1 to 50 KHz is boosted up to MAX 3000 V (0-P) by a transformer) is used for the test mode. Apply to the winding and stay overnight. At that time, high frequency components are superimposed on the power supply due to corona discharge generated from the test mode. Among these discharge pulses, a corona pulse having a low frequency is detected by the detection circuit 52.
  • Corona frequency that is meaningless among the detected corona pulses and the motor under test In order to distinguish the corona frequency of a faulty part having a distance of 1 mm or less from one winding magnet wire to the laminated core, a mouth-pass filter (500 KHz) and a high-pass filter Yuichi (2. 5 MHz) and a band pass filter 52 formed by the band pass filter 52.
  • the corona pulse is an electrically very small signal
  • the signal is amplified by the AMP54.
  • a corona pulse generated for a negative voltage applied from the high-frequency power supply 50 is also effective. Since the pulse is also a negative pulse, the pulse is changed to a positive pulse throughout the absolute value circuit 55.
  • Fig. 5 shows the results of a comparative measurement of a non-defective product in the test mode and a product with a defective phenomenon using the above method.
  • the pulse increased from about 150 V, the pulse increased from 75 V in the test motor with the failure phenomenon.
  • testing at 900 V makes it possible to judge good and defective products.
  • all of the defective portions in which a healthy winding coil has abnormally approached (within l mm) the laminate core are subjected to non-destructive inspection in the mass production process.
  • the advantageous effect of being able to provide an insulation test method that enables inspection can be obtained.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Relating To Insulation (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)

Abstract

L'invention concerne un procédé d'essai d'isolement non destructeur destiné à une machine électrique de petite taille, qui comprend une bobine, consistant à amener une atmosphère mise en dépression dans un contenant (2) qui contient une machine électrique de petite taille (1) et à appliquer une tension haute fréquence à la bobine de la machine électrique de petite taille (1). Ce procédé consiste également à détecter la génération de décharge par effet de couronne provenant d'une machine électrique de petite taille, lors de cette détection une décision est prise pour savoir si la machine électrique de petite taille est acceptable ou non par impulsion par effet de couronne augmentant lors de l'application de tension haute fréquence de 600-1100V entre un enroulement à prise et une âme de stratifié.
PCT/JP2001/009785 2000-11-10 2001-11-08 Procede et appareil d'essai d'isolement non destructeur destines a une machine electrique de petite taille WO2002039128A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020037006293A KR100705121B1 (ko) 2000-11-10 2001-11-08 소형 전기 기계의 비파괴 절연 시험 방법 및 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-343286 2000-11-10
JP2000343286A JP2002148300A (ja) 2000-11-10 2000-11-10 小型電気機械の非破壊絶縁試験方法および装置

Publications (1)

Publication Number Publication Date
WO2002039128A1 true WO2002039128A1 (fr) 2002-05-16

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PCT/JP2001/009785 WO2002039128A1 (fr) 2000-11-10 2001-11-08 Procede et appareil d'essai d'isolement non destructeur destines a une machine electrique de petite taille

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Country Link
JP (1) JP2002148300A (fr)
KR (2) KR20050087887A (fr)
CN (1) CN1216296C (fr)
WO (1) WO2002039128A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101910853A (zh) * 2008-06-25 2010-12-08 爱信艾达株式会社 绝缘被覆导体检查方法及装置
CN106405342A (zh) * 2015-07-31 2017-02-15 斯凯孚公司 用于多导程分析的局部放电检测继电器矩阵

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1870721B1 (fr) * 2005-03-02 2013-07-24 Toyota Jidosha Kabushiki Kaisha Dispositif d'inspection de l'isolation
JP5267339B2 (ja) * 2009-06-04 2013-08-21 アイシン・エィ・ダブリュ株式会社 コイルの非破壊検査方法およびその装置
CN104698349B (zh) * 2015-01-16 2017-04-12 广东电网有限责任公司电力科学研究院 一种油纸绝缘局部放电试验装置
CN105182202B (zh) * 2015-09-29 2017-11-03 北京环境特性研究所 一种微型化电晕放电探测装置
CN106526375B (zh) * 2016-10-28 2023-04-07 桂林理工大学 电工绝缘薄膜脉冲电压加速老化实验电磁作用力产生装置
KR102010062B1 (ko) 2017-12-15 2019-08-12 주식회사 포스코 결합검사장치
CN110514999A (zh) * 2019-09-04 2019-11-29 青岛艾普智能仪器有限公司 一种电机定子线圈单点破损检测方法
WO2021192319A1 (fr) 2020-03-27 2021-09-30 株式会社寺岡製作所 Ruban adhésif pelable par voie thermique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5535657B2 (fr) * 1974-06-03 1980-09-16
JPH07128392A (ja) * 1993-10-26 1995-05-19 Mitsubishi Cable Ind Ltd 非破壊絶縁試験装置
US5867029A (en) * 1995-08-02 1999-02-02 Matsushita Electric Industrial Co., Ltd. Method of nondestructive insulation test and a nondestructive insulation testing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5535657B2 (fr) * 1974-06-03 1980-09-16
JPH07128392A (ja) * 1993-10-26 1995-05-19 Mitsubishi Cable Ind Ltd 非破壊絶縁試験装置
US5867029A (en) * 1995-08-02 1999-02-02 Matsushita Electric Industrial Co., Ltd. Method of nondestructive insulation test and a nondestructive insulation testing apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101910853A (zh) * 2008-06-25 2010-12-08 爱信艾达株式会社 绝缘被覆导体检查方法及装置
CN106405342A (zh) * 2015-07-31 2017-02-15 斯凯孚公司 用于多导程分析的局部放电检测继电器矩阵

Also Published As

Publication number Publication date
CN1216296C (zh) 2005-08-24
JP2002148300A (ja) 2002-05-22
CN1473273A (zh) 2004-02-04
KR100705121B1 (ko) 2007-04-10
KR20040008114A (ko) 2004-01-28
KR20050087887A (ko) 2005-08-31

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