TWM584429U - Coil winding set inter-turn short circuit detection system - Google Patents

Abstract

This creation relates to a coil winding inter-turn short-circuit detection system, which is based on a device made of coil windings and at least one set of magnetic field sensors is arranged at an appropriate distance from the coil windings, and the magnetic field sensors are provided with an induced magnetic field strength in advance A threshold value or a quality control standard value, and sends a signal to the signal receiver when the induced magnetic field strength of the sensing coil winding is higher than a threshold value or a quality control standard value, so that the display device displays the signal information transmitted by the signal receiver , And then determine whether the inter-turn short circuit of the coil winding occurs and control the quality of the equipment.

Description

Detection system of interturn short circuit in coil winding

This creation is about a coil winding inter-turn short-circuit detection system, especially a magnetic field sensor that senses the strength of the magnetic field induced by the coil windings of the device, in order to monitor the device for the occurrence of inter-turn short-circuits in the coil in real time.

According to tradition, there are many types of equipment made of coil windings. When the above equipment is in use, the poor insulation of the coil due to loose winding, scratched or cracked enameled wire will cause short-circuits between the coil windings, which will cause Ground shorted and burned, even triggered a fire.

For the prior technology related to the detection of inter-turn short circuits, please refer to the Republic of China Patent No. 254441, which discloses a "improvement of inter-layer short circuit test circuit devices", which is a harmonic detection line device, a harmonic peak hold line device and The micro-processing circuit device is properly connected with the pulse generator and the object to be measured, so as to detect the resonance frequency and resonance time of the pulse generator and the object to be measured by the harmonic detection circuit device, and the harmonic peak value Keep the wave peaks of the stable harmonics of the line device, and then input the measured signals to the micro-processing line device for calculation, and then determine whether the object to be measured has a short circuit.

The Republic of China Patent No. 306626 discloses a "inter-layer short-circuit tester", which is connected to the input device of the microprocessor and sets the minimum quality factor value, test time, appropriate test frequency and allowable error frequency in accordance with the standard. Timing controller connected to microprocessor for easy harmonics When the vibration phenomenon occurs, output the high-voltage electric value to the object to be tested, and judge whether the object to be tested has interlayer short circuit according to the lowest standard quality factor value.

Republic of China Announcement Patent No. I391685, which discloses a "winding product detection machine and a method for detecting shorts between layers", which is based on inputting high-voltage pulse power to both ends of the winding coil of the winding product and capturing the winding coil power-on history. The voltage value is used to generate captured data, and then the captured data is subjected to time-frequency conversion operation to obtain time-frequency analysis information, and then it is displayed whether the interlayer short circuit occurs in the winding coil.

Republic of China Announcement Patent No. I603567, which discloses a "coil winding production management and control system for automatic testing and instant feedback adjustment", which is performed by an automatic winding machine to produce a coil product, and then the coil product is borrowed from a safety testing machine. Perform electrical tests to obtain coil product test data, and feed back the test data to the management platform for data analysis, so that the data analysis results output control parameters to the automatic winding machine, and adjust the winding operation of the automatic winding machine to Meet safety regulations.

In view of the fact that the conventional detection technology still needs to be calculated and analyzed after obtaining the data, it is obviously lacking in immediate monitoring.

Therefore, the purpose of this creation is to use the leakage magnetic flux generated around the coil windings as the basis for the detection of inter-turn short-circuits in the coil windings when the coil winding equipment is operating, and use a magnetic field sensor to sense the induced magnetic field strength of the coil. Then the purpose of real-time detection of inter-turn short-circuits in the coil windings is achieved.

In order to achieve the purpose of the previous disclosure, the present invention provides a coil winding inter-turn short-circuit detection system, which includes: a device made of coil windings; at least one set of magnetic field sensors located at an appropriate distance of the coil windings of the device And the magnetic field sensor is preset with a threshold value of the induced magnetic field strength or a quality control standard value, and the induced magnetic field strength of the sensing coil winding is higher than the threshold value or the quality control standard A signal is transmitted on time; a signal receiver connected to the magnetic field sensor and used to receive the signal transmitted by the magnetic field sensor; and a display device connected to the signal receiver and used to display the signal receiver The transmitted signal information is used to judge whether the interturn short circuit of the coil winding occurs and to control the quality of the equipment.

Based on the above, by setting the magnetic field sensor at an appropriate distance from the coil windings of the device, the magnetic field sensor sends a signal to the signal receiver when the magnetic field sensor senses an induced magnetic field strength that is higher than a threshold value or a quality control standard value, Then by watching the display device to understand and judge whether the interwinding short circuit of the coil winding occurs or to check the quality of the equipment, and the position of the magnetic field sensor can be used to quickly determine the position of the interwinding short circuit of the coil winding, so as to instantly respond to the occurrence of the turn. Intermediate short-circuited equipment for subsequent processing.

This creation:

1‧‧‧ system

2‧‧‧ Equipment

21‧‧‧coil winding

3‧‧‧ magnetic field sensor

4‧‧‧ Signal Receiver

5‧‧‧ display device

D‧‧‧distance

Figure 1 is a block diagram of the authoring system.

Figure 2 is a schematic diagram of the operation of the creative system.

Figure 3 is a schematic circuit diagram of the authoring system.

In order to make your reviewing committee understand the techniques, methods and effects used in the creation to achieve the purpose, the rest is enumerated in a preferred embodiment with drawings, detailed description as follows:

First, please refer to Figs. 1-2. The system 1 of the present invention includes a device made of coil windings, at least one magnetic field sensor 3, a signal receiver 4, and a display device 5. Among them, the device 2 is a transformer, a pressure ratior (PT), a current ratior (CT), a motor coil, a generator coil, and other devices that generate a magnetic field in the surrounding environment during operation; the magnetic field sensor 3 is provided on the device The appropriate distance D of the coil winding 21 of 2 is set in advance, and the magnetic field sensor 3 is preset with a warning threshold value of the induced magnetic field strength, and transmits a signal when the induced magnetic field strength of the sense coil winding 21 is higher than the warning threshold value. Tester When there are more than two groups, it is set at a proper distance D from the coil winding 21 of the device 2 at equal intervals; the signal receiver 4 is connected to the magnetic field sensor and is used to receive the signal transmitted by the magnetic field sensor 3. The display device 5 is connected to the signal receiver and is a computer screen or a mobile device, and is used to display the signal information transmitted by the signal receiver 4.

In the following, a transformer-based creative embodiment will be described. It is to make a T-phase high-voltage side eight-turn coil short-circuited transformer as a detection transformer in advance (see Figure 3 for the schematic circuit diagram of the inter-turn short-circuit test), followed by a short-circuit test using a detection transformer and a magnetic field sensor. 3 Sensing its induced magnetic field strength. When the high-voltage side of the three-phase transformer coil 21 is added to the full-load current of 98A through experimental data (refer to Table 1 below), the inter-turn short-circuit current is 570A. At this time, the transformer's T The intensity of the induced magnetic field around the phase is 237uT, and the alarm boundary value of the induced magnetic field intensity is set at 200uT ± 10uT.

Next, three groups of magnetic field sensors 3 are respectively set at a distance of 60 cm from the coil winding 21 of each phase of the transformer device 2, and the three groups of magnetic field sensors 3 are arranged at equal intervals above, middle and below the coil winding 21, respectively. Position (as shown in Figure 2) to sense the induced magnetic field strength of the magnetic field around the transformer coil winding 21, when the display device 5 connected to the signal receiver 4 shows that the induced magnetic field strength received by the signal receiver 4 is higher than 250uT, and When lasting for more than 10 seconds, it means that the transformer has turned Short-circuit phenomenon, at this time, the position of the magnetic field sensor 3 that detects the abnormally induced magnetic field strength can be used to quickly determine the inter-turn short-circuit position of the coil winding 21 of the transformer device 2 in order to immediately target the transformer device 2 where the inter-turn short-circuit occurs. Carry out fast load shedding and transfer, so as to prevent the transformer equipment 2 from being burned.

In addition, an open-circuit test and a short-circuit test can also be performed with a detection transformer, and the induced magnetic field strength can be separately sensed by the magnetic field sensor 3 to determine the quality control standard value of the induced magnetic field strength. In this embodiment, The quality control standard value for open circuit test is <5uT, and the quality control standard value for short circuit test is <200uT. Next, place the magnetic field sensor 3 at a distance of 60 cm from the coil winding 21 of the transformer device 2 which is new or to be shipped, to detect the intensity of the induced magnetic field of the coil winding 21 of the transformer device 2 when the open circuit test and the short circuit test are respectively displayed. Device 5 shows that the intensity of the induced magnetic field received by the signal receiver 4 in the open circuit test is less than 5uT, and the intensity of the induced magnetic field received in the short circuit test is less than 200uT, which means that the new or to be shipped transformer equipment 2 is a qualified product, thereby achieving the transformer Purpose of equipment 2 quality control and acceptance.

However, the above is only a preferred embodiment of this creation, and is not intended to limit the scope of implementation of this creation. Any changes and modifications that do not depart from the spirit of this creation technology are covered by the scope of this creation patent.

In summary, this creation has indeed broken through the tradition, has improved and innovative creative content, and can be implemented concretely. It should comply with the statutory requirements of new patents, file a patent application in accordance with the law, and urge the examiner of the Bureau to grant legal patent rights to encourage Creation is a matter of virtue.

Claims (4)

A detection system for an inter-turn short circuit of a coil winding includes: a device made of a coil winding; at least one set of magnetic field sensors disposed at an appropriate distance from the coil windings of the device; and the magnetic field sensor is provided with a preset A threshold value of the induced magnetic field strength or a quality control standard value, and a signal is transmitted when the induced magnetic field strength of the coil winding is higher than the threshold value or the quality control standard value; a signal receiver connected to the magnetic field sensor And a display device connected to the signal receiver and used to display the signal information transmitted by the signal receiver for judging whether the coil winding turns occur Short circuit and control the quality of the equipment. The coil winding inter-turn short-circuit detection system according to claim 1, wherein the device is a transformer, a voltage transformer (PT), a current transformer (CT), a motor coil, a generator coil, and other surrounding environments during operation. Equipment that generates magnetic fields. The detection system of the inter-turn short circuit of a coil winding according to claim 1, wherein when the magnetic field sensor has more than two groups, the magnetic field sensors are arranged at an appropriate distance from the coil winding at an equal distance. The detection system for the inter-turn short circuit of a coil winding according to claim 1, wherein the display device is a computer screen or a mobile device.