A transformer noise suppression device and a high-frequency transformer

Abstract

The application relates to a transformer noise suppression device and a high-frequency transformer, which comprises a transformer shell, a transformer core, a primary winding, a secondary winding and a noise suppression module, wherein the noise suppression module comprises a support, a base body fixed to one end of the support, a magnetostrictive component arranged between the support and the base body and a piezoelectric ceramic piece fixed to the base body; the magnetostrictive component comprises a magnetostrictive core fixed to one end of the support, a magnetostrictive piece fixed between the magnetostrictive core and the base body and a magnetostrictive winding wound outside the magnetostrictive core. The application can ensure stable and reliable operation of the transformer, suppress the noise of the transformer by using a mixed magnetostrictive and electrostrictive mode through fluid medium sound transmission or direct contact with a vibration source, combine a closed transformer shell and design a groove inside the shell to absorb sound waves, thereby realizing noise suppression of the transformer in a full frequency band, and having good application and promotion value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformer, in particular to a transformer noise suppression device and a high-frequency transformer. BACKGROUND

[0002] The noise problem of power frequency transformer has a great impact on people's production and life, especially for the application close to residential area, the harm is more obvious, in addition, it will also affect the reliable operation of the transformer. For the medium and high frequency transformer, the noise problem is more complex due to higher working frequency, and the influence on the transformer will be more obvious. Although the noise frequency is often greater than 20 kHz and cannot be recognized by human ear, the noise pollution will destroy the living environment and even affect the ecological environment, so it is necessary to suppress the noise of the transformer.

[0003] The transformer has three noise sources: core, winding and cooling component. The winding noise depends on the load, the noise of the cooling component is related to the cooling fan, and the noise of the core always exists, which usually depends on the size of magnetostriction force and electromagnetic force. The existing technology for suppressing the noise of the transformer is limited to noise suppression within a certain range, and it is difficult to achieve noise suppression in the full frequency range. In addition, the use of loudspeakers to suppress noise often produces electromagnetic interference, affecting the reliability of the equipment. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the deficiencies in the prior art, and to provide a transformer noise suppression device and a high-frequency transformer, which realizes full-frequency noise suppression by using a combination of magnetostriction and electrostriction, and ensures reliable operation of the transformer.

[0005] The present application is realized by the following technical solutions:

[0006] A transformer noise suppression device, comprising a noise suppression module, the noise suppression module comprising a support, a base body fixedly connected to one end of the support, a magnetostrictive component arranged between the support and the base body, and a piezoelectric ceramic sheet fixedly connected to the base body. The surface of the base body is uniformly provided with a groove structure, and the end of the base body is provided with a protruding portion. The magnetostrictive component comprises a magnetostrictive core fixedly connected to one end of the support, a magnetostrictive sheet fixedly connected between the magnetostrictive core and the base body, and a magnetostrictive winding wound outside the magnetostrictive core. Wherein, the piezoelectric ceramic sheet is provided with two groups, each group of piezoelectric ceramic sheet is provided with 3 pieces, the polarization direction of the piezoelectric ceramic sheet is the thickness direction, and the magnetostrictive sheet is provided with 1 piece.

[0007] The patent also discloses a high-frequency transformer comprising the transformer noise suppression device, and further comprising a transformer shell, a transformer core arranged in the transformer shell, a primary winding and a secondary winding oppositely wound on two sides of the transformer core, and the noise suppression module is arranged in the transformer shell, and the noise suppression module is provided with at least one group.

[0008] According to the above technical scheme, preferably, the base body is arranged close to or in contact with the transformer core.

[0009] According to the above technical scheme, preferably, the transformer core is provided with a core mounting rack, the core mounting rack comprises an upper cover plate and a lower base connected with the upper cover plate through a screw rod, the lower base is fixedly connected with the inner wall of the transformer shell, the base body is arranged close to or in contact with the upper cover plate, and the inner walls of the transformer shell and the upper cover plate are respectively provided with a plurality of concave grooves.

[0010] The present application has the following advantages:

[0011] The present application provides a low-noise high-power high-frequency transformer, which can ensure stable and reliable operation of the transformer, suppress the noise of the transformer by using magnetostriction and electrostriction mixed mode through fluid medium sound transmission or direct contact with the vibration source, and combine the closed transformer shell and design the grooves inside to absorb sound waves, so as to realize noise suppression of the transformer in the whole frequency range, and can be widely applied in the field of power transmission and conversion dominated by new energy, and has good application and promotion value. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the front view structure sectional view of the present application.

[0013] Figure 2 is the three-dimensional structure schematic diagram of the noise suppression module part of the present application.

[0014] Figure 3 is the three-dimensional structure explosion diagram of the noise suppression module part of the present application.

[0015] Figure 4 is the three-dimensional structure schematic diagram of the transformer core and the core mounting rack part of the present application.

[0016] Figure 5 is the three-dimensional structure schematic diagram of the transformer shell part of the present application.

[0017] In the figure: 1, transformer core; 2, primary winding; 3, secondary winding; 4, noise suppression module; 4a, base body; 4b, piezoelectric ceramic sheet; 4c, magnetostrictive sheet; 4d, magnetostrictive core; 4e, magnetostrictive winding; 4f, support; 5, transformer shell; 5a, shell cover plate; 5b, shell main body; 5c, heat dissipation tooth; 5d, heat dissipation liquid hole; 6, core mounting bracket; 6a, upper cover plate; 6b, lower base; 6c, screw rod. DETAILED DESCRIPTION

[0018] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below in combination with the drawings and the best embodiment. All other embodiments obtained by those skilled in the art on the basis of the embodiments of the present application without creative labor belong to the scope of protection of the present application.

[0019] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0020] Embodiment 1: As shown in the figure, the present application comprises a noise suppression module 4, which comprises a support 4f, a base body 4a fixed at one end of the support 4f, a magnetostrictive assembly arranged between the support 4f and the base body 4a, and a piezoelectric ceramic sheet 4b fixed to the base body 4a, the surface of the base body 4a is uniformly provided with a groove structure, which can absorb sound waves, thereby achieving the purpose of suppressing noise, in this example, the base body 4a is provided with a protruding portion, and the protruding portion is integrally formed with the base body 4a. The magnetostrictive assembly comprises a magnetostrictive core 4d fixed at one end of the support 4f, a magnetostrictive sheet 4c fixed between the magnetostrictive core 4d and the base body 4a, and a magnetostrictive winding 4e wound outside the magnetostrictive core 4d. In this example, the piezoelectric ceramic sheet 4b is provided with two groups, each group of piezoelectric ceramic sheet 4b is provided with 3 pieces, the polarization direction of the piezoelectric ceramic sheet 4b is the thickness direction, and the magnetostrictive sheet 4c is provided with 1 piece.

[0021] Embodiment 2: As shown in the figure, the application further discloses a high-frequency transformer, comprising the transformer noise suppression device, further comprising a transformer shell 5, a transformer core 1 arranged in the transformer shell 5, a primary winding 2 and a secondary winding 3 oppositely wound on both sides of the transformer core 1, wherein the upper part of the transformer shell 5 is open, the transformer shell 5 is provided with a shell cover plate 5a, which is buckled on the shell main body 5b. In this example, the transformer shell 5 has a liquid cooling hole 5d and a heat dissipation tooth 5c, the inside of the transformer shell 5 circulates liquid cooling through the liquid cooling hole 5d, and further effectively cools the transformer through the external heat dissipation tooth 5c. The noise suppression module 4 is arranged in the transformer shell 5, and the noise suppression module 4 is provided with at least one group, and in this example, the noise suppression module 4 is provided with four groups, which are respectively installed on the inner surface of the four sides of the shell main body 5b, so that the base body 4a is arranged close to or in contact with the transformer core 1, when the base body 4a is in contact with the surface of the transformer core 1, when vibration is detected, the vibration is suppressed by driving the base body 4a to apply an opposite force, realizing double noise suppression.

[0022] Embodiment 3: As shown in the figure, the application further discloses a high-frequency transformer, comprising the transformer noise suppression device, further comprising a transformer shell 5, a transformer core 1 arranged in the transformer shell 5, a primary winding 2 and a secondary winding 3 oppositely wound on both sides of the transformer core 1, wherein the noise suppression module 4 is arranged in the transformer shell 5, and the noise suppression module 4 is provided with at least one group.

[0023] According to the above embodiment, preferably, the transformer core 1 is provided with a core mounting frame 6, the core mounting frame 6 comprises an upper cover plate 6a and a lower base 6b connected with the upper cover plate 6a through a screw rod 6c, and the lower base 6b is fixedly connected with the inner wall of the transformer shell 5. The lower part of the screw rod 6c can be threadedly connected with the lower base 6b, and the upper end of the screw rod 6c is fixed to the upper cover plate 6a through a nut, so as to clamp and fix the transformer core 1 between the upper cover plate 6a and the lower base 6b. In this example, the inner wall of the transformer shell 5 and the inner surface of the upper cover plate 6a are respectively provided with a plurality of concave grooves, a closed transformer shell 5 is adopted, and concave grooves are designed inside to absorb sound waves.

[0024] According to the above embodiment, preferably, the base body 4a is arranged close to or in contact with the upper cover plate 6a, in this example, the noise suppression module 4 is provided with four groups, which are respectively installed on the inner surface of the shell cover plate 5a, and the protruding part of the base body 4a is in contact with the upper cover plate 6a, when vibration is detected, the vibration is suppressed by driving the base body 4a to apply an opposite force, realizing double noise suppression.

[0025] The use principle of the present application is as follows: the noise suppression module drives the piezoelectric ceramic sheet and the magnetostrictive sheet according to the Fourier decomposition waveform of the detected noise to make the substrate generate sound waves with opposite amplitude and phase, thereby canceling the noise generated by the transformer; meanwhile, the concave groove on the transformer shell can also absorb sound waves, thereby achieving the purpose of suppressing noise; in addition, another way is that the substrate of the noise suppression module and the upper cover plate or the transformer core are in contact, and when vibration is detected, the substrate is driven to apply opposite force to suppress the generation of vibration, thereby further suppressing noise.

[0026] The present application provides a low-noise high-power high-frequency transformer, which can ensure stable and reliable operation of the transformer, suppress the noise of the transformer by using magnetostriction and electrostriction in a mixed manner through fluid medium sound transmission or direct contact with the vibration source, and combine the closed transformer shell with the internally designed concave groove to absorb sound waves, thereby realizing noise suppression of the transformer in the full frequency range, and can be widely applied in the field of power transmission and conversion dominated by new energy, and has good application and promotion value.

[0027] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the art, some improvements and refinements can be made without departing from the principles of the present application, and these improvements and refinements should also be considered within the protection scope of the present application.

Claims

1. A transformer noise suppression device, characterized by, The noise suppression module comprises a support, a base body fixed to one end of the support, a magnetostrictive component arranged between the support and the base body, and a piezoelectric ceramic sheet fixed to the base body, the magnetostrictive component comprises a magnetostrictive core fixed to one end of the support, a magnetostrictive sheet fixed between the magnetostrictive core and the base body, and a magnetostrictive winding wound outside the magnetostrictive core, and the base body is provided with a protruding portion at the end.

2. The transformer noise suppression device of claim 1, wherein The piezoelectric ceramic sheet is provided with two groups, each group of piezoelectric ceramic sheet is provided with 3 pieces, and the polarization direction of the piezoelectric ceramic sheet is the thickness direction.

3. The transformer noise suppression device of claim 1, wherein The magnetostrictive sheet is provided with 1 piece.

4. The transformer noise suppression device according to any one of claims 1 to 3, characterized by The surface of the base body is uniformly provided with a groove structure.

5. A high frequency transformer comprising the noise suppression device for a transformer according to any one of claims 1 to 4, characterized by It also includes a transformer shell, a transformer core arranged in the transformer shell, a primary winding and a secondary winding arranged on both sides of the transformer core, the noise suppression module is arranged in the transformer shell, the noise suppression module is provided with at least one group, The base body is arranged close to or in contact with the transformer core, the transformer core is provided with a core mounting frame, the core mounting frame comprises an upper cover plate and a lower base connected with the upper cover plate through a screw rod, the lower base is fixed to the inner wall of the transformer shell, and the base body is arranged close to or in contact with the upper cover plate, The noise suppression module is provided with 4 groups, and the protruding portion of the base body abuts against the upper cover plate, when the vibration is detected, the opposite force is applied to the base body to suppress the generation of vibration.

6. A high frequency transformer according to claim 5, characterized in that The inner walls of the transformer shell and the upper cover plate are respectively provided with a plurality of concave grooves.

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