Transformer with follow-up primary winding detection

Abstract

The application relates to a transformer following main winding detection. The transformer following the main winding detection comprises a first wire turn and a second wire turn. The first wire turn comprises a first pin, a first primary winding, a second pin, a second primary winding, a third pin, a detection winding and a fourth pin. A first end of the first primary winding is wound on the first pin, a second end of the first primary winding is wound on the second pin, a first end of the second primary winding is wound on the second pin, a second end of the second primary winding is wound on the third pin, and a first end of the detection winding is wound on the fourth pin. The second wire turn comprises a fifth pin, a third primary winding and a sixth pin. A first end of the third primary winding is wound on the fifth pin, a second end of the third primary winding is wound on the sixth pin, and a second end of the detection winding is wound on the sixth pin. The application adds a winding to monitor the peak voltage in real time, thereby facilitating the subsequent absorption of the excess peak voltage.

Description

Technical Field

[0001] This utility model relates to the field of transformer technology, and in particular to a transformer that detects following the main winding. Background Technology

[0002] In order to better couple with the secondary winding and reduce the peak voltage of the primary winding, the high-frequency transformer used in switching power supplies generally adopts a winding method in which the primary and secondary windings are superimposed.

[0003] In related technologies, the main winding may withstand voltages ranging from hundreds to tens of thousands of volts. However, at present, it is impossible to monitor the peak voltage of the main winding in real time, which makes the circuit components prone to breakdown and burnout. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a transformer that follows the detection of the main winding, which can add a winding to monitor the peak voltage in real time, thereby facilitating the subsequent absorption of excess peak voltage.

[0005] The objective of this utility model is achieved through the following technical solution: The first aspect of this application provides a transformer for detecting following the main winding, comprising: a first winding including a first pin, a first primary winding, a second pin, a second primary winding, a third pin, a detection winding, and a fourth pin, wherein a first end of the first primary winding is wound on the first pin, a second end of the first primary winding is wound on the second pin, a first end of the second primary winding is wound on the second pin, a second end of the second primary winding is wound on the third pin, and a first end of the detection winding is wound on the fourth pin; and a second winding including a fifth pin, a third primary winding, and a sixth pin, wherein a first end of the third primary winding is wound on the fifth pin, a second end of the third primary winding is wound on the sixth pin, and a second end of the detection winding is wound on the sixth pin.

[0006] It also includes a third wire turn, which includes a secondary winding, a seventh pin, and an eighth pin. The first end of the secondary winding is wound on the seventh pin, and the second end of the secondary winding is wound on the eighth pin.

[0007] The first primary winding and the second primary winding form the main winding.

[0008] The winding direction of the detection winding is the same as that of the main winding.

[0009] The ratio of the number of turns in the detection winding to the number of turns in the first primary winding is 1:1.

[0010] The ratio of the number of turns in the detection winding to the number of turns in the second primary winding is 1:1.

[0011] Compared with the prior art, the present invention has at least the following advantages: This application adds a detection winding. The starting point of the detection winding is different from that of the first primary winding and the second primary winding, but the detection winding is wound together with the first primary winding and the second primary winding. Finally, the detection winding is attached to the sixth pin, while the second primary winding is attached to the third pin. Through the above winding method, the detection winding is consistent with the main winding composed of the first primary winding and the second primary winding, and the induced peak voltage is consistent, thereby realizing real-time monitoring of the peak voltage. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly described below.

[0013] Figure 1 This is a schematic diagram of the structure of a transformer that follows the main winding detection in one embodiment of the present invention. Detailed Implementation

[0014] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0015] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0016] Unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0017] In switching power supplies, high-frequency transformers typically employ a method of overlapping primary and secondary windings in the main winding to improve coupling with the secondary winding and reduce primary voltage spikes. The main winding may withstand voltages ranging from hundreds to tens of thousands of volts. However, currently, it is impossible to monitor the primary winding's voltage spikes in real time, making circuit components prone to breakdown and burnout.

[0018] To address the aforementioned issues, this application provides a transformer that tracks the main winding for detection. This allows for the addition of an extra winding to monitor voltage spikes in real time, facilitating the absorption of excess voltage spikes later.

[0019] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0020] See Figure 1 A transformer for detecting following the main winding includes: a first winding and a second winding. The first winding includes a first pin 1, a first primary winding N1, a second pin 2, a second primary winding N3, a third pin 3, a detection winding N5, and a fourth pin 4. The first end of the first primary winding N1 is wound on the first pin 1, the second end of the first primary winding N1 is wound on the second pin 2, the first end of the second primary winding N3 is wound on the second pin 2, the second end of the second primary winding N3 is wound on the third pin 3, and the first end of the detection winding N5 is wound on the fourth pin 4. The second winding includes a fifth pin 6, a third primary winding N4, and a sixth pin 7. The first end of the third primary winding N4 is wound on the fifth pin 6, the second end of the third primary winding N4 is wound on the sixth pin 7, and the second end of the detection winding N5 is wound on the sixth pin 7.

[0021] Specifically, a transformer that follows the detection of the main winding also includes a third winding, which includes a secondary winding N2, a seventh pin 8, and an eighth pin 9. The first end of the secondary winding N2 is wound on the seventh pin 8, and the second end of the secondary winding N2 is wound on the eighth pin 9.

[0022] It should be noted that the first primary winding N1 and the second primary winding N3 form the main winding, and the third primary winding N4 is the VCC power supply winding. The first primary winding N1 and the second primary winding N2 use multi-strand enameled wire, while the third primary winding N4 uses single-strand enameled wire. Furthermore, the first primary winding N1 starts at pin 1, and the detection winding N5 starts at pin 4. The detection winding N5 follows the winding of the first primary winding N1. After the first primary winding N1 is wound, it is connected to pin 2, while the detection winding N5 remains unconnected. Then, the secondary winding N2 is wound, followed by windings of the detection winding N5 and the second primary winding N3. After winding, the second primary winding N3 is connected to pin 3, the detection winding N5 is connected to pin 7, and the third primary winding N4 starts at pin 7 and ends at pin 6. By using the above winding method, the detection winding N5 is consistent with the main winding composed of the first primary winding N1 and the second primary winding N3, and the induced peak voltage is consistent, thereby realizing real-time monitoring of the peak voltage.

[0023] Preferably, the winding direction of the detection winding N5 is the same as that of the main winding.

[0024] It is understandable that having the same winding direction reduces leakage inductance between the detection winding N5 and the main winding. Leakage inductance is uncoupled magnetic field energy, which leads to signal attenuation. This, in turn, allows the detection winding N5 to sense changes in the magnetic field of the main winding more efficiently, especially voltage spikes. Secondly, since the detection winding N5 and the main winding have the same winding direction and are usually tightly coupled, both will sense external common-mode interference to an equal degree.

[0025] Preferably, the ratio of the number of turns of the detection winding N5 to the number of turns of the first primary winding N1 is 1:1.

[0026] Preferably, the ratio of the number of turns of the detection winding N5 to the number of turns of the second primary winding N3 is 1:1.

[0027] It should be noted that for voltage spikes in the main winding of a switching power supply, a detection winding N5 with the same number of turns can more accurately reproduce the amplitude and waveform of the signal. If the detection winding N5 has fewer turns, the amplitude of the induced transient signal will be proportionally reduced, which may cause small-amplitude spikes to be drowned out by noise and unable to be effectively identified. If the detection winding N5 has more turns, the signal will be amplified, but this may exceed the range of the detection circuit, leading to signal distortion or circuit damage. Therefore, having the same number of turns ensures that the transient signal is transmitted to the detection end "in its original form," which is especially suitable for scenarios that require capturing the extreme values ​​of the main winding voltage, providing accurate data for overvoltage protection and fault diagnosis.

[0028] The solution of this application has been described in detail above with reference to the accompanying drawings. In the above embodiments, the descriptions of each embodiment have different focuses; for parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. Those skilled in the art should also understand that the actions and modules involved in the specification are not necessarily essential to this application. Furthermore, it is understood that the steps in the method of this application embodiment can be adjusted, combined, and deleted according to actual needs, and the modules in the device of this application embodiment can be combined, divided, and deleted according to actual needs. The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A transformer with a follow-up winding detection, characterized in that include: The first winding includes a first pin, a first primary winding, a second pin, a second primary winding, a third pin, a detection winding, and a fourth pin. A first end of the first primary winding is wound on the first pin, a second end of the first primary winding is wound on the second pin, a first end of the second primary winding is wound on the second pin, a second end of the second primary winding is wound on the third pin, and a first end of the detection winding is wound on the fourth pin. The second winding includes a fifth pin, a third primary winding, and a sixth pin. The first end of the third primary winding is wound on the fifth pin, the second end of the third primary winding is wound on the sixth pin, and the second end of the detection winding is wound on the sixth pin.

2. The transformer following the main winding detection of claim 1, wherein, It also includes a third wire turn, which includes a secondary winding, a seventh pin, and an eighth pin. The first end of the secondary winding is wound on the seventh pin, and the second end of the secondary winding is wound on the eighth pin.

3. The transformer following the main winding detection of claim 1, wherein, The first primary winding and the second primary winding form the main winding.

4. The transformer following the detection of the main winding according to claim 3, characterized in that, The winding direction of the detection winding is the same as that of the main winding.

5. The transformer for detecting following the main winding according to claim 1, characterized in that, The ratio of the number of turns in the detection winding to the number of turns in the first primary winding is 1:

1.

6. The transformer for detecting following the main winding according to claim 1, characterized in that, The ratio of the number of turns in the detection winding to the number of turns in the second primary winding is 1:1.

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