CN219435020U

CN219435020U - Coil turn-to-turn short circuit detection table

Info

Publication number: CN219435020U
Application number: CN202320669560.0U
Authority: CN
Inventors: 彭宏功
Original assignee: Hubei Erdian Electric Co ltd
Current assignee: Hubei Erdian Electric Co ltd
Priority date: 2023-03-27
Filing date: 2023-03-27
Publication date: 2023-07-28
Anticipated expiration: 2033-03-27

Abstract

The utility model provides a coil turn-to-turn short circuit detection table, and belongs to the technical field of electromechanical manufacturing equipment. Comprises a cuboid cabinet body, wherein a U-shaped iron core is fixed at the inner top of the cabinet body; the two ends of the U-shaped iron core are respectively provided with a first winding post and a second winding post, and the first winding post and the second winding post upwards penetrate through the top of the cabinet body and extend out of the cabinet body; a test coil is wound outside the first winding post, an isolation cover is arranged at the position of the first winding post at the top of the cabinet body, and a first voltmeter, a second voltmeter, a power switch, a time delay button switch and two test wires with clamps are fixed on the isolation cover; the input end of the power switch is connected with a mains supply, the test coil is connected with the output end of the power supply after being connected with the delay button switch in series, and the test coil is connected with a first voltmeter in parallel; two ends of the second voltmeter are respectively connected with two test wires. The utility model has the advantages of simple structure, high safety and the like.

Description

Coil turn-to-turn short circuit detection table

Technical Field

The utility model belongs to the technical field of electromechanical manufacturing equipment, and relates to a coil turn-to-turn short circuit detection table.

Background

The coil is usually referred to as a winding of wire in the form of a loop, and most common coil applications are motors, inductors, transformers, loop antennas, etc., with the wires in the coil being insulated from each other. In the coil manufacturing process, the insulation layers between coils are damaged due to the fact that operation is not satisfactory, and turn-to-turn short circuits of the coils are caused. When the motor, the generator and the like have turn-to-turn short circuits, the safe and stable operation of the motor, the generator and the like can be seriously influenced, exciting current is increased in operation, output power is reduced, rotor vibration is aggravated, and the coil generates heat and other damages. Therefore, before the coil is installed, turn-to-turn short circuit detection is very necessary, and the outgoing quality of the electromechanical equipment can be effectively ensured.

Disclosure of Invention

The utility model aims to solve the problems in the prior art and provides a coil turn-to-turn short circuit detection table so as to conveniently detect turn-to-turn short circuits of coils of electromechanical equipment, remove unqualified coils in time and guarantee the quality of the electromechanical equipment.

The aim of the utility model can be achieved by the following technical scheme: the coil turn-to-turn short circuit detection table is characterized by comprising a cuboid cabinet body, wherein a U-shaped iron core is fixed at the top of the cabinet body; the two ends of the U-shaped iron core are respectively provided with a first winding post and a second winding post, and the first winding post and the second winding post upwards penetrate through the top of the cabinet body and extend out of the cabinet body; the test coil is wound outside the first winding post, an isolation cover is arranged at the position of the first winding post at the top of the cabinet body, and a first voltmeter, a second voltmeter, a power switch, a time delay button switch and two test wires with clamps are fixed on the isolation cover; the input end of the power switch is connected with a mains supply, the test coil is connected with the output end of the power supply after being connected with the delay button switch in series, and a first voltmeter is connected on the test coil in parallel; two ends of the second voltmeter are respectively connected with two test wires.

Preferably, an insulating cover is sleeved on the second winding post; an insulating plate is paved at the top of the cabinet body, and universal wheels are arranged at the bottom of the cabinet body.

The utility model has the advantages that:

1. the test board has a simple structure, can be used for testing whether an inter-turn short circuit occurs in a coil, is very convenient and quick to test, and ensures the quality of electromechanical products delivered by enterprises.

2. In this testboard, except requisite switch, still set up time delay button switch in test coil 3 front end, it can switch on and after a period of time of delaying, automatic re-setting disconnection effectively avoids test coil 3 to get electricity for a long time, and then practices thrift the electric energy, and the security is higher.

Drawings

Fig. 1 is a schematic perspective view of the test bench.

Fig. 2 is a schematic perspective view of the test bench with a panel removed from the cabinet.

Fig. 3 is a circuit diagram showing the connection of the electrical components in the test stand.

In the figure, 1, a cabinet body; 2. a U-shaped iron core; 21. a first winding post; 22. a second winding post; 3. a test coil; 4. an isolation cover; 41. a first voltmeter; 42. a second voltmeter; 43. a power switch; 44. a time delay push button switch; 45. testing the wire; 5. a measured coil; 6. an insulating cover; 7. an insulating plate; 8. and a universal wheel.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1, 2 and 3, the coil turn-to-turn short circuit detection table comprises a cuboid cabinet body 1, wherein a U-shaped iron core 2 is fixed at the inner top of the cabinet body 1; the two ends of the U-shaped iron core 2 are respectively provided with a first winding post 21 and a second winding post 22, and the first winding post 21 and the second winding post 22 penetrate through the top of the cabinet body 1 upwards and extend out of the cabinet body 1; the test coil 3 is wound outside the first winding post 21, an isolation cover 4 is arranged at the position of the first winding post 21 at the top of the cabinet body 1, and a first voltmeter 41, a second voltmeter 42, a power switch 43, a time delay button switch 44 and two test wires 45 with clamps are fixed on the isolation cover 4; the input end of the power switch 43 is connected with a mains supply, the first voltmeter 41 is used for measuring the power supply voltage, and the test coil 3 is connected with the delay button switch 44 in series and then connected with the output end of the power supply; two ends of the second voltmeter 42 are respectively connected with two test wires 45.

As shown in fig. 1, 2 and 3, when the test bench is used for coil turn-to-turn short circuit detection, the power switch 43 is turned on, the tested coil 5 is only required to be sleeved on the second winding post 22, then the clamps on the test wire 45 are clamped at two ends of the test coil 3, then the time delay button switch 44 is pressed, the test coil 3 is powered on, and then the current generates alternating magnetic flux in the iron core, so that the test coil 3 and the tested coil 5 are in electromagnetic connection, and according to the electromagnetic induction principle, the alternating magnetic flux can induce electromotive force through the two coils, and the magnitude of the electromotive force is in direct proportion to the number of turns of the coil and the maximum value of main magnetic flux. When the two ends of the tested coil 5 are disconnected, i.e. the tested end is empty, the tested end and the tested end should meet the requirement that U1/u2=n1/N2, N1 and N2 are the number of turns of the tested coil 3 and the tested coil 5 respectively, the number is known, U1 is the voltage of the power end, we can read from the first voltmeter 41, so we can calculate the voltage value of the two ends of the tested coil 5, we can read the value of the second voltmeter 42, and compare with the calculated voltage value, if the difference is large, it is proved that the number of turns of the coils is not correct, and inter-turn short circuit situation occurs in the coils.

As shown in fig. 1 and 3, in the test stand, besides the necessary power switch 43, a delay button switch 44 is disposed at the front end of the test coil 3, when the delay button switch is pressed, the test coil 3 is powered on and delayed for a period of time, so that the numerical value of the second voltmeter is read, and then the test coil is automatically reset and disconnected, so that the test coil 3 is effectively prevented from being powered on for a long time, further electric energy is saved, and the safety is higher.

As shown in fig. 1, the second winding post 22 is sleeved with an insulating cover 6; an insulating plate 7 is laid at the top of the cabinet body 1, and universal wheels 8 are arranged at the bottom of the cabinet body 1.

The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.

Claims

1. The coil turn-to-turn short circuit detection table is characterized by comprising a cuboid cabinet body (1), wherein a U-shaped iron core (2) is fixed at the inner top of the cabinet body (1); both ends of the U-shaped iron core (2) are respectively provided with a first winding post (21) and a second winding post (22), and the first winding post (21) and the second winding post (22) upwards penetrate through the top of the cabinet body (1) and extend out of the cabinet body (1); the testing device is characterized in that a testing coil (3) is wound outside the first winding column (21), an isolation cover (4) is arranged at the position of the first winding column (21) at the top of the cabinet body (1), and a first voltmeter (41), a second voltmeter (42), a power switch (43), a time-delay button switch (44) and two testing wires (45) with clamps are fixed on the isolation cover (4); the input end of the power switch (43) is connected with a mains supply, the test coil (3) is connected with the output end of the power supply after being connected with the delay push button switch (44) in series, and the test coil (3) is connected with a first voltmeter (41) in parallel; two ends of the second voltmeter (42) are respectively connected with two test wires (45).

2. The coil turn-to-turn short circuit detection table according to claim 1, wherein an insulating cover (6) is sleeved on the second winding post (22); an insulating plate (7) is laid at the top of the cabinet body (1), and universal wheels (8) are arranged at the bottom of the cabinet body (1).