Transformer testing device and system
By designing a transformer test device, and using power supply modules and isolation modules to achieve automated testing, the inefficiency problem caused by manual rewinding in the prior art is solved, the testing efficiency is improved and safety is ensured.
Patent Information
- Application Number
- CN202420485823.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-13
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-03-13
AI Technical Summary
Prior Art In transformer testing, manual intervention in rewinding is required to short-circuit the winding, resulting in additional working and time requirements, reducing test efficiency.
A transformer testing device is designed, including a control module, N power supply modules and N isolation modules. The transformer is powered by the power supply module. The isolation module uses an optocoupler to isolate the secondary edge of the transformer from the control module to realize automated testing.
The batch testing of the transformer is realized, the testing efficiency is improved, and the isolation module is used to avoid harm to the control device.
Smart Images
Figure CN222896228U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of transformers, and in particular to a transformer testing device and system. Background Art
[0002] The transformer, as a component of the power supply system, is used to convert a first voltage value into a second voltage value.
[0003] In order to ensure the reliability of voltage conversion, drive and other purposes, transformer testing is required to determine the performance of the transformer. In this transformer testing, one or more characteristic variables of the transformer are determined by measurement. Such transformer testing includes static resistance measurement, dynamic resistance measurement, transformation ratio measurement, and / or leakage impedance or leakage inductance measurement.
[0004] Generally, when setting up the transformer of a power supply, the number of turns is calculated based on the electric field strength and the input voltage value, and the appropriate magnetic core is selected. The inductance is then determined based on the number of turns. Due to the different currents, copper wires of different diameters are selected to determine the winding window area of the transformer, and finally the size parameters of the transformer are determined. However, the actual parameters of the transformer are often different from the calculated values, not only because of the voltage and current parameter problems, but also because the copper wire affects the transformer when the transformer is wound unevenly. This requires us to test the parameters of a transformer when we get it. In the end, the actual values tested are the parameter values we actually use.
[0005] During at least part of the transformer test, the windings of the transformer, for example the windings on the low voltage side, can be short-circuited. Conventionally, this requires rewinding in the sense of manual intervention, so that in order to achieve the short-circuiting of the windings during part of the transformer test, the conductive connections have to be connected in a different way, resulting in additional work and time requirements, reducing the efficiency of the transformer test.
[0006] The above problems need to be solved urgently. Utility Model Content
[0007] The purpose of the utility model is to provide a transformer testing device and system.
[0008] In order to solve the above technical problems, the utility model provides a transformer testing device, comprising;
[0009] A control module, N power supply modules and N isolation modules;
[0010] N power supply modules and N isolation modules are electrically connected to the control module respectively;
[0011] Each of the power supply modules and the isolation module is electrically connected to the primary side and the secondary side of the corresponding external transformer to be detected respectively;
[0012] Wherein, N is greater than or equal to 2.
[0013] Furthermore, the power supply module is suitable for supplying power to the transformer to be tested.
[0014] Furthermore, the power supply module includes an AC power supply and an electrical signal detection unit;
[0015] The AC power supply is electrically connected to the primary side of the external corresponding transformer to be detected;
[0016] The electrical signal detection unit is electrically connected to the control module; and
[0017] The electrical signal detection unit is suitable for detecting the electrical signal of the AC power supply and sending it to the control module.
[0018] Further, the electrical signal detection unit includes a power meter, a first voltage meter and an ammeter;
[0019] The power meter and the first voltmeter are connected in parallel to two ends of an AC power source;
[0020] The ammeter is connected in series between the AC power source and the primary side of the external corresponding transformer to be detected.
[0021] Further, the isolation module is an optical coupler;
[0022] The pin of the light source of the optical coupler is electrically connected to the control module;
[0023] The pin of the optical receiving light source of the optical coupler is connected to the secondary side of the external corresponding transformer to be detected.
[0024] Furthermore, the control module is also suitable for controlling the on and off of the optical coupler, thereby switching the experimental type of the transformer test.
[0025] Furthermore, a second voltmeter is connected in parallel between two pins of the light receiving light source of the optical coupler.
[0026] Furthermore, the transformer testing device also includes a display module;
[0027] The display module is electrically connected to the control module, and the display module is suitable for displaying the test result of the transformer.
[0028] The utility model also provides a transformer testing system, comprising: the transformer testing device as described above and N transformers to be tested;
[0029] The transformer to be detected is electrically connected between the corresponding power supply module and the isolation module.
[0030] Furthermore, the transformer testing system also includes a host computer;
[0031] The host computer is electrically connected to the control module, and the host computer is suitable for sending control instructions to the control module;
[0032] The control module is suitable for detecting the transformer to be detected according to the received control instruction.
[0033] The beneficial effect of the utility model is that the utility model provides a transformer testing device and system, wherein the transformer testing device realizes batch testing of transformers by setting N power supply modules and N isolation modules, thereby improving testing efficiency. At the same time, the secondary side of the transformer is isolated from the control module by the isolation module to avoid damage to the control device. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0035] Figure 1 It is a structural schematic diagram of a transformer testing device provided in an embodiment of the utility model. DETAILED DESCRIPTION
[0036] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0037] Example 1, please refer to Figure 1 This embodiment provides a transformer testing device, including: a control module, N power supply modules and N isolation modules; the N power supply modules and the N isolation modules are electrically connected to the control module respectively; each of the power supply modules and the isolation modules are electrically connected to the primary side and the secondary side of the external corresponding transformer to be tested respectively; wherein N is greater than or equal to 2. By setting N power supply modules and N isolation modules, batch testing of transformers is achieved to improve testing efficiency. At the same time, the secondary side of the transformer is isolated from the control module by the isolation module to avoid damage to the control device.
[0038] In this embodiment, the power supply module is suitable for supplying power to the transformer to be detected. The power supply module includes an AC power supply and an electric signal detection unit; the AC power supply is electrically connected to the primary side of the external corresponding transformer to be detected; the electric signal detection unit is electrically connected to the control module; and the electric signal detection unit is suitable for detecting the electric signal of the AC power supply and sending it to the control module. The AC power supply of the power supply module is directly electrically connected to the primary side of the transformer to be detected, and the high-voltage circuit of the AC power supply is not directly connected to the control module. The electric signal of the primary side is detected by the electric signal detection unit and the data is transmitted to the control module for calculation and display.
[0039] In this embodiment, it is necessary to detect the power, current and voltage of the primary side to meet the testing requirements of the transformer. Therefore, the electrical signal detection unit includes a power meter W, a first voltmeter V1 and an ammeter A; the power meter W and the first voltmeter V1 are connected in parallel at both ends of the AC power supply; the ammeter A is connected in series between the AC power supply and the primary side of the external corresponding transformer to be detected.
[0040] The structure of the isolation module is described below:
[0041] In this embodiment, the isolation module is an optical coupler; the pin of the light source of the optical coupler is electrically connected to the control module; the pin of the light receiving light of the optical coupler is connected to the secondary side of the external corresponding transformer to be detected. The high voltage of the secondary side is isolated from the low voltage of the control module by optical coupling, and the high voltage causes harm to the control module.
[0042] At the same time, the control module is also suitable for controlling the on and off of the optocoupler, so as to switch the experimental type of the transformer test. Among them, a second voltmeter V2 is connected in parallel between the two pins of the light source of the optocoupler. When the optocoupler is disconnected, the secondary side of the transformer to be tested is equivalent to being connected to a voltmeter, and this is a no-load experiment. When the optocoupler is turned on, the secondary side of the transformer to be tested is equivalent to being short-circuited by the optocoupler, and this is a short-circuit experiment. Among them, the core loss, excitation impedance modulus, excitation resistance, excitation reactance and voltage ratio are obtained through the no-load experiment. The copper loss, short-circuit impedance modulus, short-circuit resistance, short-circuit reactance, impedance voltage and the standard value of impedance voltage are obtained through the short-circuit experiment.
[0043] In this embodiment, the transformer testing device further includes a display module; the display module is electrically connected to the control module, and the display module is suitable for displaying the test result of the transformer.
[0044] It should be noted that the display module may be a touch screen for rapid control of the isolation module and more convenient switching of the experiment type.
[0045] This embodiment also provides a transformer testing system, including: the transformer testing device as described above and N transformers to be tested; the transformers to be tested are electrically connected between the corresponding power supply modules and isolation modules. The transformer testing device implements batch testing of transformers by setting N power supply modules and N isolation modules, thereby improving the testing efficiency. At the same time, the isolation module isolates the secondary side of the transformer from the control module to avoid damage to the control device.
[0046] In this embodiment, the transformer testing system further comprises a host computer; the host computer is electrically connected to the control module, and the host computer is suitable for sending control instructions to the control module; the control module is suitable for testing the transformer to be tested according to the received control instructions.
[0047] In summary, the utility model provides a transformer testing device and system, wherein the transformer testing device includes: a control module, N power supply modules and N isolation modules; the N power supply modules and the N isolation modules are electrically connected to the control module respectively; each of the power supply modules and the isolation modules are electrically connected to the primary side and the secondary side of the external corresponding transformer to be tested respectively; wherein N is greater than or equal to 2. By setting N power supply modules and N isolation modules, batch testing of transformers is achieved to improve testing efficiency. At the same time, the secondary side of the transformer is isolated from the control module by the isolation module to avoid damage to the control device.
[0048] All devices (parts without specific structure) selected in this application are universal standard parts or parts known to those skilled in the art, and their structures and principles can be known by those skilled in the art through technical manuals or conventional experimental methods. In addition, the software programs involved in this application are all prior art, and this application does not involve any improvement to the software programs.
[0049] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0051] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.
[0052] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
[0053] In addition, each functional unit in each embodiment of the present utility model may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
[0054] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A transformer testing device, characterized in that: include: A control module, N power supply modules and N isolation modules; N power supply modules and N isolation modules are electrically connected to the control module respectively; Each of the power supply modules and the isolation module is electrically connected to the primary side and the secondary side of the corresponding external transformer to be detected respectively; Wherein, N is greater than or equal to 2.
2. The transformer testing device according to claim 1, characterized in that: The power supply module is suitable for supplying power to the transformer to be tested.
3. The transformer testing device according to claim 2, characterized in that: The power supply module includes an AC power supply and an electrical signal detection unit; The AC power supply is electrically connected to the primary side of the external corresponding transformer to be tested; The electrical signal detection unit is electrically connected to the control module; and The electrical signal detection unit is suitable for detecting the electrical signal of the AC power supply and sending it to the control module.
4. The transformer testing device according to claim 3, characterized in that: The electrical signal detection unit includes a power meter, a first voltmeter and an ammeter; The power meter and the first voltmeter are connected in parallel to two ends of an AC power source; The ammeter is connected in series between the AC power source and the primary side of the external corresponding transformer to be detected.
5. The transformer testing device according to claim 1, characterized in that: The isolation module is an optical coupler; The pin of the light source of the optical coupler is electrically connected to the control module; The pin of the optical receiving light source of the optical coupler is connected to the secondary side of the external corresponding transformer to be detected.
6. The transformer testing device according to claim 5, characterized in that: The control module is also suitable for controlling the on and off of the optical coupler, thereby switching the experimental type of the transformer test.
7. The transformer testing device according to claim 6, characterized in that: A second voltmeter is connected in parallel between the two pins of the receiving light source of the optical coupler.
8. The transformer testing device according to claim 1, characterized in that: The transformer testing device also includes a display module; The display module is electrically connected to the control module, and the display module is suitable for displaying the test result of the transformer.
9. A transformer testing system, characterized in that: include: The transformer testing device according to any one of claims 1 to 8 and N transformers to be tested; The transformer to be detected is electrically connected between the corresponding power supply module and the isolation module.
10. The transformer testing system according to claim 9, characterized in that: The transformer testing system also includes a host computer; The host computer is electrically connected to the control module, and the host computer is suitable for sending control instructions to the control module; The control module is suitable for detecting the transformer to be detected according to the received control instruction.