Current source system for testing characteristics of mutual inductor
By designing the transformer characteristic test current source system and automatically output and record current groups, the problem of low transformer testing efficiency is solved, and the automation testing and current source functions are enriched, which improves testing efficiency and saves time.
Patent Information
- Application Number
- CN202422047575.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-22
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-08-22
AI Technical Summary
In the prior art, the transformer characteristic testing efficiency is low, the time is long, and the current source function is single, so automated testing cannot be achieved.
Design a transformer characteristic testing current source system, and automatically output and record current groups through the combination of current source, loop testing module and monitoring module, so as to realize automatic reading of current data and automatic drawing of characteristic curves.
It improves the efficiency of transformer testing, realizes automated testing, saves test time, and enriches the function of the current source, making the test of transformer characteristic curve more efficient.
Smart Images
Figure CN223284272U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of transformer testing, and in particular to a current source system for testing transformer characteristics. Background Art
[0002] A transformer is a commonly used electrical device used to measure and change the magnitude of current and voltage in a circuit. It converts high voltage or current into a smaller voltage or current. This is achieved based on the principle of electromagnetic induction. Depending on the type of electrical quantity being measured, transformers can be divided into voltage transformers and current transformers. Voltage transformers measure the magnitude and direction of voltage, while current transformers measure the magnitude and direction of current in a circuit.
[0003] A current source is a device that provides a stable current output. During the transformer characteristic test, the current source is electrically connected to the transformer to provide the required current for the transformer. By manually adjusting the current output by the current source, the current source outputs a set of currents of different sizes, and then a set of currents corresponding to the primary side of the transformer's secondary side are obtained, and the characteristic curve of the transformer is drawn. Utility Model Content
[0004] This application provides a current source system for testing transformer characteristics, which is used to improve the testing efficiency of transformers, realize automated testing, save test time, and enrich the functions of the current source. The specific scheme is as follows:
[0005] In a first aspect, the present application provides a current source system for testing mutual inductor characteristics, the current source system comprising: a current source device for testing mutual inductor characteristics and a mutual inductor; the current source device for testing mutual inductor characteristics comprises a first output end of a primary circuit, a second output end of a primary circuit, a first output end of a secondary circuit, and a second output end of a secondary circuit;
[0006] The first output end of the primary circuit is electrically connected to the first primary end of the mutual inductor, and the second output end of the primary circuit is electrically connected to the second primary end of the mutual inductor; the first output end of the secondary circuit is electrically connected to the first secondary end of the mutual inductor, and the second output end of the secondary circuit is electrically connected to the second secondary end of the mutual inductor;
[0007] The transformer characteristic test current source device is used to sequentially output currents corresponding to a first current group to the primary end of the transformer, where the first current group includes multiple current values with steps of preset differences; and is also used to obtain currents corresponding to a second current group output by the secondary end of the transformer, where the second current group includes multiple current values that correspond one-to-one to the current values in the first current group, and obtain a characteristic curve of the transformer based on the currents corresponding to the first current group and the currents corresponding to the second current group.
[0008] In the present application, a current source device for testing the characteristics of a transformer is used to sequentially output the corresponding currents in the first current group to the primary end of the transformer, and multiple currents corresponding to the current values in the first current group are obtained from the secondary end of the transformer, thereby finally obtaining the characteristic curve of the transformer. The current source device for testing the characteristics of the transformer automatically obtains and records the first current group and the second current group, thereby realizing automatic reading of current data, improving the testing efficiency of the transformer, realizing automated testing, and saving testing time. On the basis of the existing current source, the automatic testing function of the transformer characteristic curve is added, making the current source more functional and eliminating the need to build an additional transformer test circuit.
[0009] In one possible design, a current source device for testing transformer characteristics includes: a current source, a secondary circuit test module, and a transformer test monitoring module;
[0010] The first input end of the current source is electrically connected to the output end of the transformer test monitoring module, and the input end of the transformer test monitoring module is electrically connected to the output end of the secondary circuit test module;
[0011] The first output end of the current source is electrically connected to the first output end of the primary circuit, and the second output end of the current source is electrically connected to the second output end of the primary circuit; the first input end of the secondary circuit test module is electrically connected to the first output end of the secondary circuit, and the second input end of the secondary circuit test module is electrically connected to the second output end of the secondary circuit;
[0012] The current source is configured to output a current corresponding to a first current value in a first current group to the primary end of the transformer;
[0013] The secondary circuit test module is configured to obtain the current outputted from the secondary side of the transformer corresponding to the first current value in the first current group, and use the current as the current corresponding to the first current value in the second current group; and further configured to record the first current value in the first current group and the first current value in the second current group, and output a switching signal to the transformer test monitoring module;
[0014] The transformer test monitoring module is configured to receive the switching signal and control the current source to output a current corresponding to the second current value in the first current group to the primary end of the transformer.
[0015] In a possible design, after the current source outputs the current corresponding to the second current value in the first current group to the primary end of the transformer;
[0016] The secondary circuit testing module is configured to obtain the current outputted from the secondary side of the transformer corresponding to the second current value in the first current group, and use the current as the current corresponding to the second current value in the second current group; and further configured to record the second current value in the first current group and the second current value in the second current group, and output a switching signal to the transformer testing monitoring module;
[0017] The transformer test monitoring module is configured to receive the switching signal and control the current source to output a current corresponding to the third current value in the first current group to the primary end of the transformer;
[0018] Until the secondary loop testing module obtains the currents corresponding to all current values in the first current group and the second current group.
[0019] In one possible design, the current source device for testing the mutual inductor characteristics further includes: a current source monitoring module;
[0020] The current source monitoring module is electrically connected to the second input terminal of the current source;
[0021] The current source monitoring module is used to control the current source to output a current of a preset current value.
[0022] In a possible design, each current value in the first current group corresponds to each current value in the second current group in a one-to-one manner and is in a proportional relationship.
[0023] In a possible design, a characteristic curve of the transformer is obtained according to a proportional relationship between each current value in the first current group and each current in the second current group.
[0024] In a possible design, the characteristic curve corresponds to the mutual inductor on a one-to-one basis.
[0025] In a possible design, different mutual inductors correspond to different characteristic curves.
[0026] In a possible design, the characteristic curve is a current saturation characteristic curve of the transformer.
[0027] In one possible design, the parameters of the current source include current output range, current accuracy, and power. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 A schematic diagram of the structure of a current source provided in the related art;
[0029] Figure 2 A schematic structural diagram of a current source system for testing mutual inductor characteristics provided in an embodiment of the present application;
[0030] Figure 3 A schematic structural diagram of a current source device for testing mutual inductor characteristics provided in an embodiment of the present application. DETAILED DESCRIPTION
[0031] In this application, "at least one" refers to one or more, and "plurality" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a alone, b alone, or c alone can represent: a alone, b alone, c alone, a and b in combination, a and c in combination, b and c in combination, or a, b, and c in combination, where a, b, and c can be single or multiple. In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.
[0032] The directions or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present application.
[0033] The terms "connected" and "connect" should be interpreted broadly. For example, "connected" or "connected" in a circuit structure can refer not only to a physical connection, but also to an electrical connection or a signal connection. For example, it can be a direct connection, i.e., a physical connection, or an indirect connection through at least one intermediate component, as long as the circuit is interconnected. It can also refer to internal connectivity between two components. Signal connection can refer not only to signal connection through circuits but also to signal connection through media, such as radio waves. Those skilled in the art will understand the specific meanings of the above terms in this application on a case-by-case basis.
[0034] In the related art, when testing the characteristics of a transformer, the method usually adopted is: connecting the transformer in series in the loop of a current source, using the current source to provide the required current for the transformer, manually setting the current output by the current source, obtaining a set of primary currents of the transformer, and recording the current group output by the secondary side of the transformer that corresponds one to one with the primary side. Based on a set of currents input by the primary side and a set of currents output by the secondary side, the characteristic curve of the transformer is drawn. In one example, a current source outputs a current group Iin1, Iin2, ..., IinN. When the primary current of the transformer is Iin1, the current output of the secondary side of the transformer is measured by an ammeter as Iout1. When the primary current of the transformer is Iin2, the current output of the secondary side of the transformer is Iout2. By measuring and recording the currents sequentially, the current group output by the secondary side of the transformer is Iout1, Iout2, ..., IoutN. Based on the current groups Iin1, Iin2, ..., IinN and the current groups Iout1, Iout2, ..., IoutN, a characteristic curve of the transformer is plotted. In the prior art, each current value in the current group requires manual setting of the current source and manual recording of the current values output by the secondary side of the transformer, resulting in low test efficiency and long test time.
[0035] Also, see Figure 1 Conventional current sources consist of two parts: a current source and a current source monitoring module. The current source monitoring module controls the current source to output a stable current. For example, if a 1A current is required, after the current source is connected to 1A, the current source monitoring module controls the current source to output 1A. In related art, when testing transformer characteristics, current sources are used solely for outputting a stable current and have a single function.
[0036] In order to increase the function of the current source, improve the test efficiency of the transformer, realize automatic testing, and save test time, the present application provides a current source system for transformer characteristic testing, see Figure 2 , Figure 2 A schematic diagram of a current source system 1000 for testing mutual inductor characteristics is provided in an embodiment of the present application. Figure 2 As shown, the system may include: a transformer characteristic test current source device 100 and a transformer 200; the transformer characteristic test current source device 100 includes a first output end of a primary circuit, a second output end of a primary circuit, a first output end of a secondary circuit, and a second output end of a secondary circuit.
[0037] The first output end of the primary circuit is electrically connected to the first primary end of the mutual inductor, and the second output end of the primary circuit is electrically connected to the second primary end of the mutual inductor; the first output end of the secondary circuit is electrically connected to the first secondary end of the mutual inductor, and the second output end of the secondary circuit is electrically connected to the second secondary end of the mutual inductor.
[0038] The current source device for testing the mutual inductor characteristics includes four terminals: the first output terminal of the primary circuit, the second output terminal of the primary circuit, the first output terminal of the secondary circuit, and the second output terminal of the secondary circuit. The mutual inductor is connected in series to the four terminals. It can be understood that Iin and Iout are proportional.
[0039] The transformer characteristic test current source device 100 is used to sequentially output currents corresponding to a first current group to the primary end of the transformer 200, where the first current group includes multiple current values with steps of preset differences; it is also used to obtain currents corresponding to a second current group output from the secondary end of the transformer 200, where the second current group includes multiple current values that correspond one-to-one to the current values in the first current group, and obtain a characteristic curve of the transformer based on the currents corresponding to the first current group and the currents corresponding to the second current group.
[0040] The preset difference value can be set according to the user's test needs. In one example, the preset difference value can be 1A or 5A.
[0041] The first current group includes multiple current values with a preset difference in steps. In one example, when the step is 5A, the first current group can be 5A, 10A, 15A, 20A, 25A, and so on. The second current group is the current output by the secondary end of the transformer that corresponds one-to-one with the current value of the first current group. For example, when the first current group is 5A, 10A, 15A, 20A, 25A, and so on, the second current group is 1A, 2A, 3A, 4A, 5A, and so on. Based on the first and second current groups, a characteristic curve of the transformer can be obtained.
[0042] In the present application, a current source device for testing the characteristics of a transformer is used to sequentially output the corresponding currents in the first current group to the primary end of the transformer, and multiple currents corresponding to the current values in the first current group are obtained from the secondary end of the transformer, thereby finally obtaining the characteristic curve of the transformer. The current source device for testing the characteristics of the transformer automatically obtains and records the first current group and the second current group, thereby realizing automatic reading of current data, improving the testing efficiency of the transformer, realizing automated testing, and saving testing time. On the basis of the existing current source, the automatic testing function of the transformer characteristic curve is added, making the current source more functional and eliminating the need to build an additional transformer test circuit.
[0043] In one possible embodiment, see Figure 3 , Figure 3 Schematic diagram of the structure of the current source device for testing the characteristics of the mutual inductor in the embodiment of the present application. Figure 3 As shown, the current source device 100 for testing the characteristics of a transformer includes: a current source 101 , a secondary circuit testing module 102 and a transformer testing monitoring module 103 .
[0044] The first input terminal of the current source 101 is electrically connected to the output terminal of the transformer test monitoring module 103 , and the input terminal of the transformer test monitoring module 103 is electrically connected to the output terminal of the secondary circuit test module 102 .
[0045] The first output end of the current source 101 is electrically connected to the first output end of the primary circuit, and the second output end of the current source 101 is electrically connected to the second output end of the primary circuit; the first input end of the secondary circuit test module 102 is electrically connected to the first output end of the secondary circuit, and the second input end of the secondary circuit test module 102 is electrically connected to the second output end of the secondary circuit.
[0046] The current source 101 is configured to output a current corresponding to a first current value in the first current group to the primary end of the transformer 200 .
[0047] The secondary circuit test module 102 is used to obtain the current corresponding to the first current value in the first current group output by the secondary side of the transformer, and use it as the current corresponding to the first current value in the second current group; it is also used to record the first current value in the first current group and the first current value in the second current group, and output a switching signal to the transformer test monitoring module 103.
[0048] The transformer test monitoring module 103 is configured to receive the switching signal and control the current source 101 to output a current corresponding to the second current value in the first current group to the primary end of the transformer 200 .
[0049] The first current group includes multiple current values with a step size of a preset difference, and the multiple currents in the first current group are sequentially output to the primary end of the transformer through the current source. The specific working process of the current source device for testing the transformer characteristics is as follows: first, the first current value in the first current group is output through the current source; the current corresponding to the first current value in the first current group output by the secondary end of the transformer is obtained by using the secondary circuit test module to obtain the first current value in the second current group, and the first current value in the first current group and the first current value in the second current group are recorded. After the recording is completed, a switching signal is output and the switching signal is transmitted to the transformer test monitoring module; after receiving the switching signal, the transformer test monitoring module controls the current source to output the current corresponding to the second current value in the first current group to the primary end of the transformer. In an example, when the first current group is 5A, 10A, 15A, 20A, and 25A, the current source first outputs 5A to the transformer, and the secondary circuit test module obtains the 1A current output from the secondary end of the transformer, records the first current value in the first current group as 5A and the first current value in the second current group as 1A, and after the recording is completed, outputs a switching signal to the transformer test monitoring module to control the current source to output the second current value of 10A in the first current group to the primary end of the transformer.
[0050] In a possible embodiment, after the current source 101 outputs the current corresponding to the second current value in the first current group to the primary end of the transformer 200; the secondary circuit test module 102 is used to obtain the current corresponding to the second current value in the first current group output by the secondary end of the transformer, and use it as the current corresponding to the second current value in the second current group; it is also used to record the second current value in the first current group and the second current value in the second current group, and output a switching signal to the transformer test monitoring module.
[0051] The transformer test monitoring module 103 is configured to receive the switching signal and control the current source 101 to output a current corresponding to the third current value in the first current group to the primary end of the transformer 200 .
[0052] Until the secondary circuit testing module 102 obtains the currents corresponding to all the current values in the first current group and the second current group.
[0053] In the embodiment of the present application, a loop is formed by the current source 101, the secondary circuit test module 102 and the transformer test monitoring module 103 to sequentially read and record all current values in the first current group and the second current group. Specifically, after the current source outputs the second current in the first current group; the secondary circuit test module is used to obtain the current corresponding to the second current value in the first current group output by the secondary side of the transformer, obtain the second current value in the second current group, and record the second current value in the first current group and the second current value in the second current group. After the recording is completed, a switching signal is output and the switching signal is transmitted to the transformer test monitoring module; after the transformer test monitoring module receives the switching signal, the current source is controlled to output the current corresponding to the third current value in the first current group to the primary side of the transformer, until the secondary circuit test module obtains the current corresponding to all current values in the first current group and the second current group and stops. In an example, when the first current group is 5A, 10A, 15A, 20A, and 25A, after the current source outputs the second current value 10A in the first current group to the primary end of the transformer, the secondary circuit test module obtains the 2A current output from the secondary end of the transformer, records the second current value in the first current group as 10A and the second current value in the second current group as 2A, and after the recording is completed, outputs a switching signal to the transformer test monitoring module to control the current source to output the third current value 15A in the first current group to the primary end of the transformer, until the secondary circuit test module obtains the first current group as 5A, 10A, 15A, 20A, 25A and the second current group as 1A, 2A, 3A, 4A, and 5A.
[0054] In the embodiment of the present application, a loop is formed by a current source, a secondary circuit test module, and a transformer test monitoring module to sequentially read and record all current values in the first current group and the second current group. This enables automatic reading of current data, improves transformer testing efficiency, realizes automated testing, and saves testing time.
[0055] In one possible embodiment, see Figure 3 The current source device 100 for testing the characteristics of a mutual inductor further includes: a current source monitoring module 104 .
[0056] The current source monitoring module 104 is electrically connected to the second input terminal of the current source 101 .
[0057] The current source monitoring module 104 is configured to control the current source 101 to output a current of a preset current value.
[0058] The preset current value can be set according to user needs. For example, the preset current value is 1A, 10A or 20A.
[0059] The current source monitoring module is electrically connected to the current source and is configured to control the current source to output a current value consistent with the user's desired current value when the user sets a desired current value. In one example, when the current source is required to output a current value of 5A, 10A, or 15A in the first current group, the current source monitoring module controls the current source to output the corresponding current of 5A, 10A, or 15A.
[0060] In a possible embodiment, each current value in the first current group corresponds one-to-one to each current value in the second current group and is in a proportional relationship.
[0061] The current in the first current group is the input current of the primary side of the transformer, and the current in the second current group is the output current of the secondary side of the transformer. The input current of the primary side of the transformer and the output current of the secondary side correspond one to one and are proportional to the characteristics of the winding coil of the transformer itself.
[0062] In a possible embodiment, a characteristic curve of the transformer is obtained according to a proportional relationship between each current value in the first current group and each current in the second current group.
[0063] The proportional relationship between the current values in the first current group and the current values in the second current group represents the characteristics of the transformer itself. A characteristic curve of the transformer can be drawn based on the two sets of data.
[0064] In a possible embodiment, the characteristic curves correspond to the mutual inductors on a one-to-one basis, and each mutual inductor corresponds to its own characteristic curve.
[0065] In a possible embodiment, different mutual inductors correspond to different characteristic curves. Each mutual inductor corresponds to its own characteristic curve. During the mutual inductor testing process, the mutual inductor can be replaced so that different mutual inductors correspond to different characteristic curves.
[0066] In a possible embodiment, the characteristic curve is a current saturation characteristic curve of the transformer.
[0067] The current saturation characteristic curve of the current transformer is an important parameter of the current transformer, which is used to characterize the saturation of the current transformer core.
[0068] In a possible embodiment, the parameters of the current source include current output range, current accuracy, and power.
[0069] The parameters of a current source generally include current output range, current accuracy, and power. For example, the current output range of a current source is 0 to 100A; the current accuracy is 0.01A; and the power is 2000W.
[0070] Finally, it should be noted that the above embodiments are merely specific implementations of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.
Claims
1. A current source system for testing mutual inductor characteristics, characterized in that: The transformer characteristic test current source system comprises: a transformer characteristic test current source device and a transformer; the transformer characteristic test current source device comprises a first output end of a primary circuit, a second output end of a primary circuit, a first output end of a secondary circuit, and a second output end of a secondary circuit; The first output end of the primary circuit is electrically connected to the first primary end of the mutual inductor, and the second output end of the primary circuit is electrically connected to the second primary end of the mutual inductor; the first output end of the secondary circuit is electrically connected to the first secondary end of the mutual inductor, and the second output end of the secondary circuit is electrically connected to the second secondary end of the mutual inductor; The transformer characteristic test current source device is used to sequentially output currents corresponding to a first current group to the primary end of the transformer, where the first current group includes multiple current values with steps of preset differences; and is also used to obtain currents corresponding to a second current group output by the secondary end of the transformer, where the second current group includes multiple current values that correspond one-to-one to the current values in the first current group, and obtain a characteristic curve of the transformer based on the currents corresponding to the first current group and the currents corresponding to the second current group.
2. The current source system for measuring mutual inductor characteristics according to claim 1, wherein: The current source device for testing the characteristics of a transformer includes: a current source, a secondary circuit test module, and a transformer test monitoring module; The first input end of the current source is electrically connected to the output end of the transformer test monitoring module, and the input end of the transformer test monitoring module is electrically connected to the output end of the secondary circuit test module; The first output end of the current source is electrically connected to the first output end of the primary circuit, and the second output end of the current source is electrically connected to the second output end of the primary circuit; the first input end of the secondary circuit test module is electrically connected to the first output end of the secondary circuit, and the second input end of the secondary circuit test module is electrically connected to the second output end of the secondary circuit; The current source is configured to output a current corresponding to a first current value in a first current group to the primary end of the transformer; The secondary circuit test module is configured to obtain the current outputted from the secondary side of the transformer corresponding to the first current value in the first current group, and use the current as the current corresponding to the first current value in the second current group; and further configured to record the first current value in the first current group and the first current value in the second current group, and output a switching signal to the transformer test monitoring module; The transformer test monitoring module is configured to receive the switching signal and control the current source to output a current corresponding to the second current value in the first current group to the primary end of the transformer.
3. The current source system for testing mutual inductor characteristics according to claim 2, characterized in that: After the current source outputs the current corresponding to the second current value in the first current group to the primary end of the transformer; The secondary circuit testing module is configured to obtain the current outputted from the secondary side of the transformer corresponding to the second current value in the first current group, and use the current as the current corresponding to the second current value in the second current group; and further configured to record the second current value in the first current group and the second current value in the second current group, and output a switching signal to the transformer testing monitoring module; The transformer test monitoring module is configured to receive the switching signal and control the current source to output a current corresponding to the third current value in the first current group to the primary end of the transformer; Until the secondary loop testing module obtains the currents corresponding to all current values in the first current group and the second current group.
4. The current source system for testing mutual inductor characteristics according to claim 1, characterized in that: The current source device for testing the characteristics of a mutual inductor further comprises: a current source monitoring module; The current source monitoring module is electrically connected to the second input terminal of the current source; The current source monitoring module is used to control the current source to output a current of a preset current value.
5. The current source system for testing mutual inductor characteristics according to claim 1, characterized in that: Each current value in the first current group corresponds to each current value in the second current group in a one-to-one manner and is in a proportional relationship.
6. The current source system for testing mutual inductor characteristics according to claim 1, characterized in that: A characteristic curve of the mutual inductor is obtained according to a proportional relationship between the current values in the first current group and the current values in the second current group.
7. The current source system for testing mutual inductor characteristics according to claim 1, characterized in that: The characteristic curve corresponds to the mutual inductor in a one-to-one manner.
8. The current source system for testing mutual inductor characteristics according to claim 1, characterized in that: Different mutual inductors correspond to different characteristic curves.
9. The current source system for testing mutual inductor characteristics according to claim 1, characterized in that: The characteristic curve is a current saturation characteristic curve of the transformer.
10. The current source system for testing mutual inductor characteristics according to claim 1, characterized in that: The parameters of the current source include current output range, current accuracy and power.