Motor coil polarity detection device and method

Abstract

The embodiment of the invention provides a motor coil polarity detection device and method. The device comprises an insulating shell, a direct-current power supply, an inching switch and a light-emitting diode, a first wiring jack, a second wiring jack, a third wiring jack and a fourth wiring jack are respectively arranged on the insulating shell; the direct-current power supply and the inching switch are connected in series to form a first detection loop; two ends of the first detection loop are respectively connected with the first wiring socket and the second wiring socket; two ends of the light-emitting diode are respectively connected with the third and fourth wiring sockets; the first and second wiring jacks are respectively connected with two ends of the excitation coil; the third and fourth wiring jacks are respectively used for connecting two ends of a to-be-tested coil. According to the coil polarity detection device, the light-emitting diode is used as an indicating meter, various test devices are integrated in the insulating shell, and complicated test wiring is changed into an integrated coil polarity detection device, so that test operation is simplified, a detection result is more visual, and the efficiency and convenience of coil polarity detection are improved.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of motor coil polarity detection, and specifically relate to a motor coil polarity detection device and method. Background Art

[0002] When the end leads of field equipment such as three-phase motors and DC motors are removed, it is sometimes impossible to determine the polarity of the head and tail of each coil of the motor due to unclear markings. If the head and tail of the coil are connected incorrectly, the motor will not be able to start due to the different magnetic field forces. Therefore, it is very necessary to conduct a polarity detection test to confirm the correctness of the disassembled and repaired motor.

[0003] At present, when measuring the polarity of the motor coil on site, a potassium battery power supply and a milliammeter are used, and an external connection line is used for a jog test. The traditional test method of polarity detection is used to judge by the swing of the milliammeter needle.

[0004] The existing test method is based on the principle of electromagnetic induction and uses the most basic loose parts wiring method for testing. It is the basic application of traditional test methods. The test site devices are messy.

[0005] The test operation is complicated, and the polarity judgment based on the swing of the needle is not intuitive. Summary of the invention

[0006] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a motor coil polarity detection device and method.

[0007] One aspect of the present disclosure provides a motor coil polarity detection device, the device comprising an insulating housing, a DC power supply, a jog switch and a light emitting diode;

[0008] The insulating housing is provided with a first wiring socket, a second wiring socket, a third wiring socket and a fourth wiring socket respectively; the DC power supply, the inching switch and the light emitting diode are all arranged inside the insulating housing;

[0009] The DC power supply and the inching switch are connected in series to form a first detection circuit;

[0010] The two ends of the first detection circuit are connected to the first wiring socket and the second wiring socket respectively; the two ends of the light emitting diode are connected to the third wiring socket and the fourth wiring socket respectively;

[0011] The first wiring socket and the second wiring socket are respectively used to connect the two ends of the excitation coil; the third wiring socket and the fourth wiring socket are respectively used to connect the two ends of the coil to be tested.

[0012] Further, the first end of the inching switch is connected to the first wiring socket, and the second end of the inching switch is connected to the positive electrode of the DC power supply;

[0013] The negative electrode of the DC power supply is connected to the second wiring socket.

[0014] Optionally, a detection button is also provided on the insulating housing;

[0015] The detection button is connected to the inching switch, and the detection button is used to control the inching switch to open or close.

[0016] Optionally, the DC power supply is a lithium battery.

[0017] Furthermore, the device further comprises a current limiting resistor; the current limiting resistor and the light emitting diode are connected in series to form a second detection circuit;

[0018] Two ends of the second detection loop are connected to the third wiring socket and the fourth wiring socket respectively.

[0019] Further, the first end of the current limiting resistor is connected to the third wiring socket, and the second end of the current limiting resistor is connected to the positive electrode of the light emitting diode;

[0020] The cathode of the light emitting diode is connected to the fourth wiring socket.

[0021] Another aspect of the present disclosure provides a method for detecting polarity of a motor coil. Based on the above-mentioned device for detecting polarity of a motor coil, the method comprises:

[0022] Providing an excitation coil and a coil to be tested;

[0023] Connecting two ends of the excitation coil to the first wiring socket and the second wiring socket respectively;

[0024] Connecting two ends of the coil to be tested to the third wiring socket and the fourth wiring socket respectively;

[0025] The inching switch is closed, and the polarity of the coil to be tested is detected according to the working state of the light emitting diode.

[0026] Further, judging the polarity of the coil to be tested according to the working state of the light emitting diode includes:

[0027] If the light-emitting diode is on, it is determined that the polarity of the coil to be tested is consistent with that of the exciting coil; if the light-emitting diode is not on, it is determined that the polarity of the coil to be tested is opposite to that of the exciting coil.

[0028] A motor coil polarity detection device and method according to an embodiment of the present disclosure adopts a light-emitting diode as an indicator meter and integrates various test devices in an insulating housing, thereby changing the cumbersome test wiring into an integrated motor coil polarity detection device, simplifying the test operation, making the test result more intuitive, and increasing the efficiency and convenience of motor coil polarity detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a motor coil polarity detection device according to an embodiment of the present disclosure;

[0030] Figure 2 The present invention is a flowchart of a method for detecting the polarity of a motor coil according to another embodiment of the present invention. DETAILED DESCRIPTION

[0031] The coils in the motor are usually arranged closely, and one of the two adjacent or close coils is used as the excitation coil, and the other coil is used as the coil to be tested. When the external DC power supply is energized at both ends of the excitation coil, the coil to be tested will generate current in the same direction due to electromagnetic induction, and the positive and negative poles at both ends of the coil to be tested can be determined. Based on the above principle, it can be determined whether the head and tail wiring of each coil in the motor is correct.

[0032] In the existing motor coil polarity test, various test devices such as DC power supply and milliammeter are used as basic components for test wiring. When multiple sets of coils need to be tested for polarity detection, multiple devices need to be frequently disconnected and moved, which greatly increases the time and complexity of the test and reduces the test efficiency.

[0033] In view of the above technical problems, the embodiments of the present disclosure integrate various test devices into an insulation test box to form an integrated motor coil polarity detection device, thereby simplifying the test operation and increasing the test efficiency.

[0034] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0035] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0036] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0037] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the concepts of the present disclosure. As used in this disclosure, the term "and / or" includes any one of the associated listed items and all combinations of one or more.

[0038] Those skilled in the art will appreciate that the drawings are merely schematic diagrams of example embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing the present disclosure, and therefore cannot be used to limit the protection scope of the present disclosure.

[0039] like Figure 1 As shown, an embodiment of the present disclosure provides a motor coil polarity detection device, including an insulating housing 10, a DC power supply 20, a momentary switch 30 and a light emitting diode 40. The insulating housing 1 is provided with a first wiring socket 51, a second wiring socket 52, a third wiring socket 53 and a fourth wiring socket 54. The DC power supply 20, the momentary switch 30 and the light emitting diode 40 are all arranged inside the insulating housing 10. The DC power supply 20 and the momentary switch 30 are connected in series to form a first detection loop L1. The two ends of the first detection loop L1 are respectively connected to the first wiring socket 51 and the second wiring socket 52. The two ends of the light emitting diode 40 are respectively connected to the third wiring socket 53 and the fourth wiring socket 54. The first wiring socket 51 and the second wiring socket 52 are respectively used to connect the two ends of the excitation coil; the third wiring socket 53 and the fourth wiring socket 54 are respectively used to connect the two ends of the coil to be tested.

[0040] Specifically, the first end of the momentary switch 30 is connected to the first wiring socket 51, the second end of the momentary switch 30 is connected to the positive pole of the DC power supply 20, and the negative pole of the DC power supply 20 is connected to the second wiring socket 52, so that the first wiring socket 51 on the insulating shell 10 is set as a positive pole socket, and the second wiring socket 52 is set as a negative pole socket. Each wiring socket can use a dedicated test line to lead out a test terminal or a test clamp, which is convenient for flexible connection of the corresponding excitation coils and the coils to be tested. The DC power supply 20 uses a lithium battery, which has a larger capacity than the potassium battery currently used in the motor coil polarity test, making the device more durable, without the need for frequent charging, and increasing convenience.

[0041] For example, Figure 1 As shown, a detection button 60 is also provided on the insulating housing 10. The detection button 60 is connected to the inching switch 30, and the detection button 60 is used to control the inching switch 30 to open or close.

[0042] Specifically, the inching switch 30 can be a spring reset switch, and the detection button 60 is linked with the inching switch 30 to form a trigger test button. When the detection button 60 is pressed, the inching switch 30 is closed, and the first detection circuit L1 is turned on; after the detection button 60 is released, the inching switch 30 is reset, thereby disconnecting the first detection circuit L1.

[0043] For example, Figure 1 As shown, the device further includes a current limiting resistor 70. The current limiting resistor 70 and the light emitting diode 40 are connected in series to form a second detection loop L2. Both ends of the second detection loop L2 are connected to the third wiring socket 53 and the fourth wiring socket 54 respectively.

[0044] Specifically, the resistance of the current limiting resistor 70 can be set according to the output current of the DC power supply 20 and the resistance of the coil and other specific test environment conditions to protect the light-emitting diode 40 from being damaged by the impact of large current.

[0045] For example, Figure 1 As shown, the first end of the current limiting resistor 70 is connected to the third wiring socket 53, the second end of the current limiting resistor 70 is connected to the positive electrode of the light emitting diode 40, and the negative electrode of the light emitting diode 40 is connected to the fourth wiring socket 54. When the induced current flows from the third wiring socket 53 and then flows into the positive electrode of the light emitting diode 40 through the current limiting resistor 70, the light emitting diode 40 lights up; and when the induced current flows from the fourth wiring socket 54 into the negative electrode of the light emitting diode 40, it will not light up. In this way, the polarity of the two ends of the coil under test connected to the third wiring socket 53 and the fourth wiring socket 54 can be detected, so as to determine whether the coil under test is installed correctly.

[0046] A motor coil polarity detection device according to an embodiment of the present disclosure uses a light-emitting diode as an indicator meter and integrates various test devices in an insulating housing, thereby changing the cumbersome test wiring into an integrated motor coil polarity detection device, simplifying the test operation, making the test results more intuitive, and increasing the efficiency and convenience of motor coil polarity detection.

[0047] like Figure 2 As shown, another embodiment of the present disclosure provides a motor coil polarity detection method, based on the motor coil polarity detection device described in the previous embodiment. The method includes:

[0048] Step S1, providing an excitation coil and a coil to be tested.

[0049] Specifically, the coils in the motor are usually arranged closely. In the coil polarity detection test based on the principle of electromagnetic induction, one of the two adjacent or close coils can be used as the excitation coil, and the other coil can be used as the coil to be tested. The distance between the two coils needs to be sufficient to generate a certain induced current through electromagnetic induction to drive an indicating meter used to determine whether the polarities of the two coils are consistent.

[0050] Step S2: Connect two ends of the excitation coil to the first wiring socket and the second wiring socket respectively.

[0051] Specifically, refer to Figure 1 , respectively lead out the test wires from the first wiring socket 51 and the second wiring socket 52 of the motor coil polarity detection device, and respectively connect the test wires to the two ends of the excitation coil C1. When the positive pole of the DC power supply 20 is connected to the first wiring socket 51, the negative pole is connected to the second wiring socket 52, and the excitation coil C1 is energized, the end of the excitation coil C1 connected to the first wiring socket 51 is the positive pole, and the end connected to the second wiring socket 52 is the negative pole.

[0052] Step S3, connecting two ends of the coil to be tested to the third wiring socket and the fourth wiring socket respectively.

[0053] Specifically, refer to Figure 1 When the positive pole of the light emitting diode 40 is connected to the third wiring socket 53 and the negative pole thereof is connected to the fourth wiring socket 54, a test wiring head or a wiring clamp is led out from the third wiring socket 53 and connected to the end of the coil to be tested C2 which should be the positive pole in theory, and a test wiring head or a wiring clamp is led out from the fourth wiring socket 54 and connected to the end of the coil to be tested C2 which should be the negative pole in theory.

[0054] Step S4, closing the inching switch, and detecting the polarity of the coil to be tested according to the working state of the light emitting diode.

[0055] Specifically, refer to Figure 1 The moment switch 30 can be a spring reset switch. When the moment switch 30 is pressed to close, according to the wiring performed in the previous step S3, if the light-emitting diode 40 lights up, it is judged that the polarity of the coil to be tested C2 is consistent with the excitation coil C1; if the light-emitting diode 40 is not lit, it is judged that the polarity of the coil to be tested C2 is opposite to that of the excitation coil C1.

[0056] It can be understood that the judgment of the polarity of the coil to be tested based on the working state of the light-emitting diode should be determined according to the specific wiring conditions in the device. If one of the following situations occurs: the DC power supply 20 in step S2 is reversed, the light-emitting diode 40 in step S3 is reversed, the wiring at both ends of the excitation coil C1 is swapped, and the wiring at both ends of the coil to be tested C2 is swapped, then the above judgment process should be changed to: if the light-emitting diode is on, it is judged that the polarity of the coil to be tested is opposite to that of the excitation coil; if the light-emitting diode is not on, it is judged that the polarity of the coil to be tested is consistent with that of the excitation coil.

[0057] A motor coil polarity detection method according to an embodiment of the present invention adopts a light-emitting diode as an indicator meter and integrates various test devices into an insulating housing, thereby changing the cumbersome test wiring into an integrated motor coil polarity detection device, simplifying the test operation, making the test result more intuitive, and increasing the efficiency and convenience of motor coil polarity detection.

[0058] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A motor coil polarity detection device, characterized in that: The device comprises an insulating housing, a DC power supply, a jog switch and a light emitting diode; The insulating housing is provided with a first wiring socket, a second wiring socket, a third wiring socket and a fourth wiring socket respectively; the DC power supply, the inching switch and the light emitting diode are all arranged inside the insulating housing; The DC power supply and the inching switch are connected in series to form a first detection circuit; The two ends of the first detection circuit are connected to the first wiring socket and the second wiring socket respectively; the two ends of the light emitting diode are connected to the third wiring socket and the fourth wiring socket respectively; The first wiring socket and the second wiring socket are respectively used to connect the two ends of the excitation coil; the third wiring socket and the fourth wiring socket are respectively used to connect the two ends of the coil to be tested.

2. The motor coil polarity detection device according to claim 1, characterized in that: The first end of the inching switch is connected to the first wiring socket, and the second end of the inching switch is connected to the positive electrode of the DC power supply; The negative electrode of the DC power supply is connected to the second wiring socket.

3. The motor coil polarity detection device according to claim 1, characterized in that: The insulating housing is also provided with a detection button; The detection button is connected to the inching switch, and the detection button is used to control the inching switch to open or close.

4. The motor coil polarity detection device according to any one of claims 1 to 3, characterized in that: The DC power source is a lithium battery.

5. The motor coil polarity detection device according to any one of claims 1 to 3, characterized in that: The device further comprises a current limiting resistor; the current limiting resistor and the light emitting diode are connected in series to form a second detection circuit; Two ends of the second detection loop are connected to the third wiring socket and the fourth wiring socket respectively.

6. The motor coil polarity detection device according to claim 5, characterized in that: The first end of the current limiting resistor is connected to the third wiring socket, and the second end of the current limiting resistor is connected to the positive electrode of the light emitting diode; The cathode of the light emitting diode is connected to the fourth wiring socket.

7. A motor coil polarity detection method, based on a motor coil polarity detection device according to any one of claims 1 to 6, characterized in that: The method comprises: Providing an excitation coil and a coil to be tested; Connecting two ends of the excitation coil to the first wiring socket and the second wiring socket respectively; Connecting two ends of the coil to be tested to the third wiring socket and the fourth wiring socket respectively; The inching switch is closed, and the polarity of the coil to be tested is detected according to the working state of the light emitting diode.

8. The method for detecting the polarity of a motor coil according to claim 7, characterized in that: The step of judging the polarity of the coil to be tested according to the working state of the light emitting diode comprises: If the light-emitting diode is on, it is determined that the polarity of the coil to be tested is consistent with that of the exciting coil; if the light-emitting diode is not on, it is determined that the polarity of the coil to be tested is opposite to that of the exciting coil.

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