Small servo electronic transformer

Abstract

The utility model relates to the technical field of electronic transformers, in particular to a small servo electronic transformer which comprises a shell. The mounting plate is arranged in the shell; the circuit board is fixed below the mounting plate and is electrically connected with the mounting plate through screw terminal strips which are arranged at two ends of the mounting plate in a penetrating manner; the circuit board is fixedly connected with the heat dissipation assembly, and the at least one display unit is arranged at the power output end of the mounting plate. A shell of the electronic transformer is made of cast aluminum alloy and internally filled with high-performance epoxy resin, a first glue joint heat conduction layer is formed between the bottom of a mounting plate and the top of a circuit board, and a second glue joint heat conduction layer is formed between the bottom of the circuit board and the lower surface of a base body of a fin base. The glue joint heat conduction layer is used for conducting heat in the transformer, has the effects of insulation and shock absorption and is low in cost, and meanwhile, electronic components in the shell can be kept stable. The transformer is lighter in weight, can bear a harsh use environment, has the advantages of being small in size, light in weight and low in price, and facilitates miniaturization of a power supply system.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic transformers, in particular to a small servo electronic transformer. Background Art

[0002] A servo transformer is a special transformer designed for the voltage mismatch between the industrial power grids in most countries and regions and products such as servo controllers, frequency converters, and stepper controllers; it is also commonly referred to as an electronic servo transformer, a servo electronic transformer, an intelligent electronic servo transformer, a servo power supply, etc. in the industry. It is widely used in the power supply adaptation of products such as servo systems, frequency conversion systems, and stepper systems due to its advantages of small size, light weight, high efficiency, and high cost performance. This product is a super-small servo electronic transformer specially designed for the voltage mismatch between the Chinese power grid (three-phase AC380V) and the AC servo system (the power supply requirement is three-phase 200 - 240VAC), aiming to solve the problems of large size, heavy weight, difficult installation, and high price of traditional dry transformers. Content of the Utility Model

[0003] The purpose of the utility model is to provide a small servo electronic transformer to solve the problems put forward in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a small servo electronic transformer, comprising: a housing; a heat dissipation component, an installation plate arranged inside the housing, and a circuit board fixed below the installation plate and electrically connected to it through screw terminal rows penetrating through both ends of the installation plate; the circuit board is fixedly connected to the heat dissipation component, and at least one display unit, the at least one display unit is arranged at the power output end of the installation plate.

[0005] Preferably, a cover body made of transparent or semi-transparent material is detachably arranged on the top of the housing, and connection ports suitable for external power supply inlets are arranged at both ends of the housing on the same side as the screw terminal rows at both ends of the installation plate.

[0006] Preferably, one end of the screw terminal rows at both ends of the installation plate is connected to the external power supply inlet, and the other end is the power output line of this electronic transformer.

[0007] Preferably, the display unit includes a support plate; a display lamp and a digital tube electrically connected to the upper surface of the support plate, and an input filter on the circuit board at the power input end.

[0008] Preferably, the heat dissipation component includes a fin seat fixedly connected to the circuit board and a heat dissipation fan arranged on one side of the fin seat.

[0009] Preferably, the fin seat includes a seat body and heat dissipation fins, and the heat dissipation fins are evenly arranged on the upper surface of the seat body and integrally extend upward.

[0010] Preferably, the housing is made of cast aluminum alloy and internally potted with epoxy resin to form a first bonded heat-conducting layer between the bottom of the mounting plate and the top of the circuit board and a second bonded heat-conducting layer between the bottom of the circuit board and the lower surface of the seat body of the fin seat.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The housing of the electronic transformer of the present utility model is made of cast aluminum alloy and internally potted with high-performance epoxy resin. A first bonded heat-conducting layer is formed between the bottom of the mounting plate and the top of the circuit board, and a second bonded heat-conducting layer is formed between the bottom of the circuit board and the lower surface of the seat body of the fin seat. The function of setting the bonded heat-conducting layer is to conduct the heat inside the transformer and has the effects of insulation, shock absorption and noise reduction, and the cost is also low. At the same time, the stability of the electronic components inside the housing can be maintained, so that the transformer can be lighter in weight while being able to withstand more severe use environments, realizing the characteristics of small volume, light weight and low price, which is beneficial to the miniaturization of the power supply system. Description of the Drawings

[0013] Figure 1 is a front view structural schematic diagram of the present utility model;

[0014] Figure 2 is a rear view structural schematic diagram of the present utility model;

[0015] Figure 3 is an exploded structural schematic diagram of the present utility model;

[0016] Figure 4 is an exploded structural schematic diagram of the present utility model;

[0017] Figure 5 is a schematic diagram of the wiring principle of the driver of the present utility model;

[0018] Figure 6 is a schematic diagram of the wiring circuit principle of the present utility model;

[0019] Figure 7 is of the present utility model Figure 3 an enlarged structural schematic diagram of part A.

[0020] Figure 8 is of the present utility model Figure 4 an enlarged structural schematic diagram of part A.

[0021] Markings in the figure: 1. Housing; 2. Heat dissipation component; 210. Fin seat; 211. Seat body; 212. Heat sink; 220. Heat dissipation fan; 3. Mounting plate; 4. Screw terminal block; 410. Even screw terminal block; 420. Odd screw terminal block; 5. Circuit board; 6. Display unit; 610. Support plate; 620. Display lamp; 621. Green lamp; 622. Red lamp; 630. Digital tube; 640. Input filter; 7. Cover body; 8. Connection port. Detailed implementation mode

[0022] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as a limitation of the present invention.

[0023] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention belongs. The terms "first", "second" and similar terms used in the description and claims of the patent application of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. The terms "including" or "comprising" and the like mean that the elements or items appearing before the term cover the elements or items listed after the term and their equivalents, without excluding other elements or items. The terms "connected" or "coupled" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right" and the like are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0024] Please refer to Figures 1-8 , the present invention provides a technical solution: a small servo electronic transformer, comprising: a housing 1; a heat dissipation component 2, a mounting plate 3 disposed inside the housing 1, and a circuit board 5 fixed below the mounting plate 3 and electrically connected to the mounting plate 3 through screw terminal blocks 4 penetrating through both ends of the mounting plate 3; the circuit board 5 is fixedly connected to the heat dissipation component 2, and at least one display unit 6, and at least one display unit 6 is disposed at the power output end of the mounting plate 3.

[0025] As Figures 1-4As shown in the figure, a detachable cover 7 made of transparent or translucent material is fixed to the top of the housing 1 by screwing with a screw assembly. Both ends of the housing 1 on the same side as the screw terminal blocks 4 at both ends of the mounting plate 3 are provided with connection ports 8 suitable for external power supply inlets. Before use, first remove the screw assembly connected to the intersection points around the housing 1 and the cover 7 together, check the conditions of the components on the mounting plate 3 inside the housing 1. After confirming that there is no problem, then connect the external power cord to the screw terminal blocks 4 at both ends and reinstall the cover 7 in place on the top of the housing 1. During use, the operating conditions of the components on the mounting plate can be observed through the transparent or translucent cover 7.

[0026] As Figures 3-6 shown, one end of the screw terminal blocks 4 at both ends of the mounting plate 3 is provided with an even number of terminals for connecting the external power supply inlet, and the other end is provided with an odd number of terminals for the power output of this electronic transformer. Preferably, in this embodiment, the number of connection terminals of the screw terminal block 410 with an even number is set to 4 (i.e., R, S, T, and N). Among them, R, S, and T are connected to the phase lines of three-phase 380VAC, and N is connected to the neutral line. The number of connection terminals of the screw terminal block 420 with an odd number is set to 3 (i.e., L1, L2, and L3). The three-phase 200VAC power output of the transformer is connected to the main power supply of the external driver. The electronic transformer of the present utility model can be matched with AC servo systems of multiple brands, including but not limited to Panasonic, Yaskawa, Siemens, Delta, etc. Taking Panasonic as an example, the wiring schematic diagram of the driver of this electronic transformer is shown.

[0027] As Figure 3 , Figure 4 , Figure 7 and Figure 8 shown, in this embodiment, the display unit 6 includes a support plate 610; a display lamp 620 and a digital tube 630 electrically connected to the upper surface of the support plate 610, and an input filter 640 located on the circuit board 5 at the power input end. The setting of the display lamp 620 facilitates the staff to observe the working state of the transformer through the cover 7. For example: when the green lamp 621 is on and the red lamp 622 is off, it indicates that the state is normal; when the red lamp 622 is on and the green lamp 621 is off, it indicates that the protection circuit is open and needs to be detected and repaired; when the green lamp 621 is on (with a relatively dim brightness) and the red lamp 622 is off, it indicates that one of the phases R or T is missing; when both the green lamp 621 and the red lamp 622 are off, it indicates that both phases R and T are missing, or phase S is missing, or all phases R, S, and T are missing. By setting the input filter 640, not only can it provide protection such as overvoltage, undervoltage, phase loss, or overheating for the transformer, but also, in combination with the digital tube 630 and the display lamp 620, the specific operating state of the transformer can be analyzed.

[0028] As a further illustration, when the servo electronic transformer is within the range of three-phase AC voltage of 380VAC ± 20%, it can output normally. When the three-phase AC exceeds this range, the input filter 640 provides overvoltage or undervoltage protection and shuts off the output, thus effectively protecting the driver and avoiding the problem that the output voltage of the traditional dry-type transformer increases correspondingly due to too high input voltage, which may cause damage to the servo driver. At the same time, the servo electronic transformer will also monitor the temperature of the power device in real time through high-speed temperature sampling. When the detected temperature exceeds 45 degrees Celsius, the fan is turned on and the rotational speed of the fan housing increases continuously as the temperature rises. When the temperature is higher than 70°, the servo electronic transformer shuts off the output. When any one of the input phases R, S, T is missing, the servo electronic transformer can quickly identify the phase loss and shut off the output. When the power input neutral line N is interchanged with any one of the phases R, S, T, the servo electronic transformer can quickly identify and shut off the output.

[0029] As Figures 1-4 shown, the heat dissipation component 2 includes a fin seat 210 fixedly connected to the circuit board 5 and a heat dissipation fan 220 disposed on one side of the fin seat 210. Among them, the fin seat 210 includes a seat body 211 located below and heat dissipation fins 212 uniformly arranged on the seat body 211 and integrally extending upward. The lower surface of the seat body 211 is attached to the second adhesive heat conduction layer located on the upper layer to facilitate the conduction of heat to the heat dissipation fins 212 made of aluminum alloy material. Subsequently, the heat is quickly blown out by the heat dissipation fan 220, which can well ensure the efficient operation of the transformer. At the same time, the heat dissipation fins 212 adopt a grid-like shape, which can increase the heat dissipation area and ensure the smooth air path, facilitating the rapid dissipation of heat.

[0030] Continuing to refer to Figures 1-4 , in this embodiment, the housing 1 is made of cast aluminum alloy and is internally filled with high-performance epoxy resin. A first adhesive heat conduction layer is formed between the bottom of the mounting plate 3 and the top of the circuit board 5, and a second adhesive heat conduction layer is formed between the bottom of the circuit board 5 and the lower surface of the seat body 211 of the fin seat 210. The function of setting the adhesive heat conduction layer is to conduct the heat inside the transformer and has the effects of insulation, shock absorption, and low cost. At the same time, it can keep the electronic components inside the housing 1 stable, enabling this transformer to be lighter in weight while being able to withstand more severe use environments.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A small servo electronic transformer, characterized in that: include: case; A heat dissipation component, a mounting plate arranged inside the shell, and a circuit board fixed below the mounting plate and electrically connected to the mounting plate via screw terminal blocks passing through both ends of the mounting plate; the circuit board is fixedly connected to the heat dissipation component, and at least one display unit, the at least one display unit is arranged at the power output end of the mounting plate.

2. A small servo electronic transformer according to claim 1, characterized in that: A cover made of a transparent or translucent material is detachably provided on the top of the shell, and connection ports suitable for external power supply lines are provided at two ends of the shell and the screw terminal blocks at both ends of the mounting plate on the same side.

3. A small servo electronic transformer according to claim 1, characterized in that: One end of the screw terminal block located at both ends of the mounting plate is connected to the external power supply input line and the other end is the power supply output line of the electronic transformer.

4. A small servo electronic transformer according to claim 1, characterized in that: The display unit comprises a support plate; a display lamp and a digital tube electrically connected to the upper surface of the support plate and an input filter located on a circuit board at a power input end.

5. The small servo electronic transformer according to claim 1, characterized in that: The heat dissipation assembly comprises a fin seat fixedly connected to the circuit board and a heat dissipation fan arranged on one side of the fin seat.

6. A small servo electronic transformer according to claim 5, characterized in that: The fin seat comprises a seat body and heat sinks, wherein the heat sinks are evenly arranged on the upper surface of the seat body and extend upwards to be integrally formed.

7. A small servo electronic transformer according to claim 6, characterized in that: The shell is made of cast aluminum alloy and is filled with epoxy resin inside to form a first adhesive heat-conducting layer between the bottom of the mounting plate and the top of the circuit board and a second adhesive heat-conducting layer between the bottom of the circuit board and the lower surface of the seat body of the fin seat.

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