AC servo drive with stable working performance

Abstract

The present invention discloses an AC servo driver with stable working performance, comprising: a servo driver provided with an electromagnetic shielding housing, the servo driver being provided with an electronic control board, signal output terminals and signal input terminals, the electronic control board being arranged inside the electromagnetic shielding housing, the signal output terminals and the signal input terminals both being electrically connected to the electronic control board, and the signal output terminals and the signal input terminals being respectively arranged on opposite sides of the electromagnetic shielding housing; a display electrically connected to the electronic control board and protruding at least on one side from the electromagnetic shielding housing; a controller electrically connected to the electronic control board, the controller including function keys, the function keys protruding from the electromagnetic shielding housing; and a grounding device for grounding the electromagnetic shielding housing. The technical solution of the present invention can improve the working stability of the AC servo driver.

Description

Technical Field

[0001] The present invention relates to the technical field of servo drives, and particularly to an AC servo drive with stable working performance. Background Art

[0002] AC servo drives are characterized by high performance and are the core of motion control systems, being widely used in industrial control. The performance indicators of AC servo drives mainly include speed regulation range, positioning accuracy, speed stability accuracy, and frequency response, etc. AC servo drives are mainly divided into a control part and a power part. The former completes the processing of weak electrical signals such as operation and control, and the latter converts weak electrical signals into strong electrical signals to drive the servo motor.

[0003] However, when the servo drive is working, since the circuit will generate electromagnetic interference during operation, the servo drive is subject to electromagnetic interference from external encoders, controllers, and servo motors, resulting in unstable performance during operation and affecting the working accuracy of the servo drive. Summary of the Invention

[0004] The main purpose of the present invention is to provide an AC servo drive with stable working performance, aiming to improve the working stability of the AC servo drive.

[0005] To achieve the above object, the AC servo drive with stable working performance proposed by the present invention includes:

[0006] A servo drive provided with an electromagnetic shielding housing. The servo drive is provided with an electronic control board, signal output terminals, and signal input terminals. The electronic control board is disposed inside the electromagnetic shielding housing. The signal output terminals and the signal input terminals are both electrically connected to the electronic control board, and the signal output terminals and the signal input terminals are respectively disposed on opposite sides of the electromagnetic shielding housing;

[0007] A display electrically connected to the electronic control board and protruding at least on one side from the electromagnetic shielding housing;

[0008] A controller electrically connected to the electronic control board. The controller includes function keys that protrude from the electromagnetic shielding housing; and

[0009] A grounding device connecting the electromagnetic shielding housing and grounding the electromagnetic shielding housing.

[0010] Optionally, the electromagnetic shielding housing includes a first shielding layer, a second shielding layer, and a nano-conductive layer disposed between the first shielding layer and the second shielding layer.

[0011] Optionally, the first shielding layer and the second shielding layer are set as metal layers, and the nano-conductive layer is set as nano-conductive powder.

[0012] Optionally, the nano-conductive layer is provided as a mixed conductive powder composed of metal conductive powder and non-metal conductive powder.

[0013] Optionally, the thickness range of the nano-conductive layer is from 3 millimeters to 8 millimeters.

[0014] Optionally, the electronic control board is disposed on the inner bottom surface of the electromagnetic shielding housing, and a reinforcing convex portion is provided between the electronic control board and the inner bottom surface of the electromagnetic shielding housing, and the reinforcing convex portion is made of an elastic material.

[0015] Optionally, the electronic control board is detachably connected to the electromagnetic shielding housing.

[0016] Optionally, a connecting portion is provided at the terminals of the signal output terminal and the signal input terminal, and a wire is electrically connected to the signal output terminal and the signal input terminal through the connecting portion. The connecting portion includes a conductive inner housing and an insulating outer housing, and an elastic member connecting the conductive inner housing and the insulating outer housing is provided between the conductive inner housing and the insulating outer housing, and a connecting hole for inserting the wire is provided in the middle of the conductive inner housing.

[0017] Optionally, the inner diameter of the connecting hole gradually decreases along the insertion direction of the wire.

[0018] Optionally, a wiring fixing device connected to the electromagnetic shielding housing is provided on the outer side of the electromagnetic shielding housing, and the wiring fixing device is used for fixing the wires connected to the signal output terminal and the signal input terminal.

[0019] Optionally, the wiring fixing device is provided as a U-shaped buckle, and one end is fixed to the electromagnetic shielding housing, and the other end of the U-shaped buckle is detachably connected to the electromagnetic shielding housing.

[0020] Optionally, a temperature detection device is provided inside the electromagnetic shielding housing, and the temperature detection device is electrically connected to the display.

[0021] Optionally, a semiconductor refrigeration sheet is further provided inside the electromagnetic shielding housing, and the semiconductor refrigeration sheet is disposed at a position close to the electronic control board.

[0022] The technical solution of the present invention is to provide an electromagnetic shielding housing on the servo drive. The servo drive is provided with an electronic control board, a signal output terminal, and a signal input terminal. The electronic control board is arranged inside the electromagnetic shielding housing. The signal output terminal and the signal input terminal are both electrically connected to the electronic control board, and the signal output terminal and the signal input terminal are respectively arranged on opposite sides of the electromagnetic shielding housing. By arranging the electronic control board inside the electromagnetic shielding housing, the influence of external electromagnetic interference on the operation of the electronic control board can be avoided, making the operating state of the electronic control board more stable. In addition, the signal output terminal and the signal input terminal are respectively arranged on opposite sides of the electromagnetic shielding housing, which can reduce the electromagnetic interference between the wires and make the signal input and output more stable. The servo drive is further provided with a display, a controller, and a grounding device. The display is electrically connected to the electronic control board and at least one side protrudes from the electromagnetic shielding housing. Through the intuitive display of the display, the operating state of the servo drive can be clearly known. And the controller is electrically connected to the electronic control board. The controller includes function keys that protrude from the electromagnetic shielding housing. By operating the function keys, the working mode of the servo drive can be set, which is more convenient for applications in different scenarios. The grounding device is connected to the electromagnetic shielding housing and grounds the electromagnetic shielding housing to reduce the static electricity in the housing and reduce the electromagnetic interference of electromagnetic waves on the electronic control board, further improving the working stability of the servo drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0024] Figure 1 It is a schematic structural diagram of an embodiment of an AC servo drive with stable working performance according to the present invention;

[0025] Figure 2 It is a schematic structural diagram of another embodiment of an AC servo drive with stable working performance according to the present invention;

[0026] Figure 3 is Figure 1 a schematic structural diagram of an embodiment of the electromagnetic shielding housing in

[0027] Figure 4 is Figure 1 a schematic structural diagram of an embodiment of the connecting part in

[0028] Figure 5 is Figure 1Structural diagram of an embodiment of the middle wiring fixing device.

[0029] Explanation of the reference numerals in the drawings:

[0030]

[0031]

[0032] The realization of the object of the present invention, its functional features and advantages will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0034] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0035] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The present invention provides an AC servo driver with stable working performance.

[0037] In an embodiment of the present invention, referring to Figure 1 and Figure 2 , the AC servo driver with stable working performance includes:

[0038] Servo driver 100 is provided with an electromagnetic shielding housing 110. The servo driver 100 is provided with an electronic control board 125, a signal output terminal 120 and a signal input terminal 121. The electronic control board 125 is arranged inside the electromagnetic shielding housing 110. The signal output terminal 120 and the signal input terminal 121 are both electrically connected to the electronic control board 125. The signal output terminal 120 and the signal input terminal 121 are respectively arranged on opposite sides of the electromagnetic shielding housing 110;

[0039] A display 130 is electrically connected to the electronic control board 125 and at least one side thereof protrudes from the electromagnetic shielding housing 110;

[0040] A controller 140 is electrically connected to the electronic control board 125. The controller 140 includes function keys, and the function keys protrude from the electromagnetic shielding housing 110; and

[0041] A grounding device 150 is connected to the electromagnetic shielding housing 110 and grounds the electromagnetic shielding housing 110.

[0042] The technical solution of the present invention is to provide an electromagnetic shielding housing 110 on the servo drive 100. The servo drive 100 is provided with an electronic control board 125, a signal output terminal 120 and a signal input terminal 121. The electronic control board 125 is arranged inside the electromagnetic shielding housing 110. The signal output terminal 120 and the signal input terminal 121 are both electrically connected to the electronic control board 125. The signal output terminal 120 and the signal input terminal 121 are respectively arranged on opposite sides of the electromagnetic shielding housing 110. By arranging the electronic control board 125 inside the electromagnetic shielding housing 110, the influence of external electromagnetic interference on the operation of the electronic control board 125 can be avoided, and the working state of the electronic control board 125 becomes more stable. In addition, the signal output terminal 120 and the signal input terminal 121 are respectively arranged on opposite sides of the electromagnetic shielding housing 110, which can reduce the electromagnetic interference between the wires and make the signal input and output more stable. The servo drive 100 is further provided with a display 130, a controller 140 and a grounding device 150. The display 130 is electrically connected to the electronic control board 125 and at least one side protrudes from the electromagnetic shielding housing 110. Through the intuitive display of the display 130, the working state of the servo drive 100 can be clearly known. And the controller 140 is electrically connected to the electronic control board 125. The controller 140 includes function keys, and the function keys protrude from the electromagnetic shielding housing 110. By operating the function keys, the working mode of the servo drive 100 can be set, which is more convenient for applications in different scenarios. The grounding device 150 is connected to the electromagnetic shielding housing 110 and grounds the electromagnetic shielding housing 110 to reduce the static electricity in the housing and reduce the electromagnetic interference of the electromagnetic wave on the electronic control board 125, further improving the working stability of the servo drive 100.

[0043] Optionally, referring to Figure 3 , the electromagnetic shielding housing 110 includes a first shielding layer 111, a second shielding layer 112 and a nano-conductive layer 113 arranged between the first shielding layer 111 and the second shielding layer 112. Specifically, the first shielding layer 111 and the second shielding layer 112 are set as metal layers, and the nano-conductive layer 113 is set as nano-conductive powder. By setting the first shielding layer 111 and the second shielding layer 112 as metal layers, the multi-layer shielding housing has high electromagnetic shielding performance, and a nano-conductive layer 113 is arranged between the first shielding layer 111 and the second shielding layer 112, further improving the electromagnetic shielding performance of the electromagnetic shielding housing 110.

[0044] Of course, the first shielding layer 111 and the second shielding layer 112 can also be set as other non-metal layers, and only the nano-conductive layer 113 is used for electromagnetic shielding. For example, the first shielding layer 111 is set as an insulating layer, and the second shielding layer 112 is set as an insulating layer. Through the electromagnetic shielding function of the nano-conductive layer 113, the influence of external electromagnetic interference on the servo driver 100 can be reduced. At the same time, the first shielding layer 111 and the second shielding layer 112 have insulating properties and can block the current inside and outside, further improving the working stability of the servo driver 100. However, this design is not limited thereto. In other embodiments, the first shielding layer 111 can be set as an insulating layer, while the second shielding layer 112 is set as a metal layer. Through the electromagnetic shielding functions of the nano-conductive layer 113 and the second shielding layer 112, the influence of external electromagnetic interference on the servo driver 100 can be reduced. At the same time, the first shielding layer 111 has insulating properties and can block the current inside and outside, further improving the working stability of the servo driver 100.

[0045] Further, the nano-conductive layer 113 is set as a mixed conductive powder composed of metal conductive powder and non-metal conductive powder. The mixed conductive powder is uniformly filled between the first shielding layer 111 and the second shielding layer 112 to ensure that each part between the first shielding layer 111 and the second shielding layer 112 has good electromagnetic shielding performance.

[0046] Further, the thickness range of the nano-conductive layer 113 is 3 mm to 8 mm. When the thickness range of the nano-conductive layer 113 is greater than 8 mm, although the electromagnetic shielding performance is improved, the cost is increased. When the thickness range of the nano-conductive layer 113 is less than 3 mm, the electromagnetic shielding performance is weak, affecting the working stability of the servo driver 100. When the thickness range of the nano-conductive layer 113 is between 3 mm and 8 mm, both the cost and the electromagnetic shielding performance of the multi-layer shielding housing are considered, and the AC servo driver 100 can work well and stably.

[0047] Optionally, the AC servo driver with stable working performance is provided with a grounding device 150. The grounding device 150 is connected to the electromagnetic shielding housing 110 and grounds the electromagnetic shielding housing 110. Specifically, the grounding device 150 includes a wire. One end of the wire is connected to the electromagnetic shielding housing 110, and the other end is connected to the ground to conduct the current inside the electromagnetic shielding housing 110 to the ground, making the electromagnetic shielding effect of the electromagnetic shielding housing 110 more stable.

[0048] Optionally, the electronic control board 125 is disposed on the inner bottom surface of the electromagnetic shielding housing 110. A reinforcing convex portion 114 is provided between the electronic control board 125 and the inner bottom surface of the electromagnetic shielding housing 110. The reinforcing convex portion 114 is made of an elastic material. It can be understood that disposing the electronic control board 125 on the inner bottom surface of the electromagnetic shielding housing 110 is beneficial to keeping the working state of the electronic control board 125 stable and improving the working stability of the servo driver 100. A reinforcing convex portion 114 is provided between the electronic control board 125 and the inner bottom surface of the electromagnetic shielding housing 110. The reinforcing convex portion 114 can be set as a cube or a cylinder, which is convenient for abutting against the inner bottom surface of the electronic control board 125 and the electromagnetic shielding housing 110. Both ends of the reinforcing convex portion 114 respectively abut against one side of the electronic control board 125 facing the electromagnetic shielding housing 110 and the inner bottom surface of the electromagnetic shielding housing 110. After the electronic control board 125 and the electromagnetic shielding housing 110 are fixed, the reinforcing convex portion 114 can play a shock-absorbing role for the electronic control board 125, reducing the influence of external impact on the electronic control board 125 and making the working performance of the electronic control board 125 more stable. The reinforcing convex portion 114 can be made of silica gel material. The silica gel material is soft in texture and has high elasticity, which can improve the buffering force for the electronic control board 125.

[0049] Optionally, the electronic control board 125 is detachably connected to the electromagnetic shielding housing 110. Specifically, the electronic control board 125 and the electromagnetic shielding housing 110 are connected by a screw locking structure. The electronic control board 125 is provided with a screw hole, and the electromagnetic shielding housing 110 is provided with another screw hole. Screws pass through the two screw holes for locking and fixing, which has the advantage of firm fixation and is convenient for installation and disassembly. However, this design is not limited thereto. In other embodiments, the electronic control board 125 and the electromagnetic shielding housing 110 can also be connected by other detachable connection methods.

[0050] Optionally, referring to Figure 4, a connection part 1201 is provided at the terminals of the signal output terminal 120 and the signal input terminal 121. A wire is electrically connected to the signal output terminal 120 and the signal input terminal 121 through the connection part 1201. The connection part 1201 includes a conductive inner housing 1205 and an insulating outer housing 1206. An elastic member 1207 connected to the conductive inner housing 1205 and the insulating outer housing 1206 is provided between the conductive inner housing 1205 and the insulating outer housing 1206. A connection hole 1205a for the wire to be inserted is provided in the middle of the conductive inner housing 1205. It can be understood that when the wire is installed, the wire is electrically connected by inserting into the conductive inner housing 1205. The insulating outer housing 1206 can prevent electric leakage through its insulating property. The connection hole 1205a is provided in the middle of the conductive inner housing 1205, which is convenient for the wire to be inserted and at the same time ensures the stable electrical connection between the wire and the terminals of the signal output terminal 120 and the signal input terminal 121. The elastic member 1207 is connected between the conductive inner housing 1205 and the insulating outer housing 1206. When the wire is not inserted, the conductive inner housing 1205 is in a relaxed state; when the wire is inserted, the wire squeezes the conductive inner housing 1205 to move towards the insulating outer housing 1206. Since the conductive inner housing 1205 squeezes the elastic member 1207 to deform, the elastic member 1207 generates a squeezing force on the conductive inner housing 1205. After the wire is inserted, it is subjected to the squeezing force, and the wire is not easy to loosen and is fixed more firmly, ensuring the stable connection between the wire and the terminals of the signal output terminal 120 and the signal input terminal 121, thereby ensuring stable signal input and stable signal output, and making the working state of the servo driver 100 more stable; in addition, when the wire is accidentally touched, the wire is not easy to be disconnected from the signal output terminal 120 and the signal input terminal 121, causing the working state of the servo driver 100 to stop, and improving the working fault tolerance rate of the servo driver 100.

[0051] Optionally, the elastic member 1207 can be set as a spring or a metal elastic sheet. The conductive inner housing 1205 is made of an elastic conductive material. When the conductive inner housing 1205 is in a relaxed state where the wire is not inserted, the elastic member 1207 squeezes the conductive inner housing 1205 to move towards the direction of the connection hole 1205a; when the wire is inserted, the wire squeezes the conductive inner housing 1205 to move towards the direction of the elastic member 1207, and the elastic member 1207 generates an elastic force on the conductive inner housing 1205, thereby fixing the wire.

[0052] Optionally, the inner diameter of the connection hole 1205a gradually decreases along the insertion direction of the wire. It can be understood that when the wire is inserted, the insertion port near the outside of the housing is larger, making it easier for the wire to be inserted. And the inner diameter decreases towards the inside, which is beneficial for the electrical connection ends of the wire to be electrically connected to the signal output terminals 120 and the signal input terminals 121, ensuring stable electrical connection between the wire and the signal output terminals 120 and the signal input terminals 121, reducing poor contact, and improving the stability of the working performance. When the wire is pulled out, by pulling it outwards with force, the wire can be pulled out, avoiding complex wire removal steps, saving time and effort.

[0053] Optionally, a wiring fixing device 115 connected to the electromagnetic shielding housing 110 is provided on the outside of the electromagnetic shielding housing 110. The wiring fixing device 115 is used to fix the wires connected to the signal output terminals 120 and the signal input terminals 121. By fixing the wires connected to the signal output terminals 120 and the signal input terminals 121 through the wiring fixing device 115, the connection looseness between the wires and the signal output terminals 120 and the signal input terminals 121 can be avoided, making the signal output and signal input more stable, and making the working performance of the servo driver 100 more stable.

[0054] Optionally, referring to Figure 1 and Figure 5 , the wiring fixing device 115 is set as a U-shaped buckle, and one end is fixed to the electromagnetic shielding housing 110. The other end of the U-shaped buckle is detachably connected to the electromagnetic shielding housing 110. Specifically, the end of the U-shaped buckle connected to the electromagnetic shielding housing 110 is provided with a clamping projection 116, and the electromagnetic shielding housing 110 is provided with a clamping groove corresponding to the clamping projection 116. The U-shaped buckle is fixed to the electromagnetic shielding housing 110 by the clamping projection 116 being snapped into the clamping groove. In this way, it has the advantage of being convenient for disassembly and installation and is relatively fast during wire installation. However, this design is not limited to this. In other embodiments, the end of the U-shaped buckle connected to the electromagnetic shielding housing 110 can also be made of an elastic material. The elastic material can be bent. When fixing the wire, by pulling the end of the U-shaped buckle with the elastic material, an installation opening can be formed, and the wire can be fixed into the inner space of the U-shaped buckle. In this way, it has the advantage of simple installation.

[0055] Furthermore, in other embodiments, there are multiple U-shaped buckles. The multiple U-shaped buckles are arranged at different positions of the multi-layer electromagnetic shielding housing 110. By increasing the distance between the wires installed in the U-shaped buckles, the interference between adjacent wires is reduced, and the stability of signal input or output data transmission is improved.

[0056] Optionally, a temperature detection device 160 is provided inside the electromagnetic shielding housing 110, and the temperature detection device 160 is electrically connected to the display 130. The temperature detection device 160 is used to measure the temperature inside the electromagnetic shielding housing 110 and send the measured temperature data to the display 130 for display. From the display 130, the temperature inside the electromagnetic shielding housing 110 can be intuitively known, and the working state of the components inside the electromagnetic shielding housing 110 can be understood. The temperature detection device 160 can be a temperature measurement sensor, which has the advantage of convenient temperature measurement. In addition, the temperature detection device 160 is arranged close to the position of the electronic control board 125, so that the temperature of the area near the electronic control board 125 can be known in time, and the working state of the electronic control board 125 can be understood.

[0057] Optionally, a thermoelectric cooler 170 is also provided inside the electromagnetic shielding housing 110, and the thermoelectric cooler 170 is arranged at a position close to the electronic control board 125. The refrigeration device is mainly used to lower the temperature of the electronic control board 125 and prevent the working components of the electronic control board 125 from being burned out due to excessive temperature. The thermoelectric cooler 170 and the temperature detection device 160 are arranged on opposite sides of the electronic control board 125, so that the detected temperature of the temperature detection device 160 is more accurate. In addition, through the setting of the thermoelectric cooler 170, the working environment temperature of the electronic control board 125 can be reduced, and the stability of the electronic control board 125 during operation can be improved.

[0058] Optionally, a power indicator is also provided on one side of the electromagnetic shielding housing 110. The power indicator is electrically connected to the electronic control board 125 and is used to indicate the working state of the servo driver 100. When the servo driver 100 is powered on, the power indicator emits light for prompting. When the servo driver 100 is powered off, the power indicator does not emit light. The power indicator can be set as an LED lamp or other light-emitting lamps to have a stable light-emitting effect.

[0059] Optionally, a storage battery is also provided inside the electromagnetic shielding housing 110. The storage battery is electrically connected to the electronic control board 125. The storage battery can be set as a lithium battery. When the servo driver 100 is powered off, the servo driver 100 can continue to be used, avoiding damage to the servo driver 100 caused by irregular power outages and affecting the service life of the servo driver 100. In addition, a charging interface is also provided on one side of the electromagnetic shielding housing 110. Through the charging interface, the servo driver 100 can be connected to an external power source to charge the storage battery.

[0060] The above are only alternative embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present invention.

Claims

1. An AC servo driver with stable working performance, characterized in that, Including: A servo driver, provided with an electromagnetic shielding housing. The servo driver is provided with an electronic control board, a signal output terminal and a signal input terminal. The electronic control board is arranged inside the electromagnetic shielding housing. The signal output terminal and the signal input terminal are both electrically connected to the electronic control board. The signal output terminal and the signal input terminal are respectively arranged on opposite sides of the electromagnetic shielding housing; A display, electrically connected to the electronic control board and at least one side protruding from the electromagnetic shielding housing; A controller, electrically connected to the electronic control board. The controller includes function keys, and the function keys protrude from the electromagnetic shielding housing; And A grounding device, connecting the electromagnetic shielding housing and grounding the electromagnetic shielding housing; The electromagnetic shielding housing includes a first shielding layer, a second shielding layer and a nano-conductive layer arranged between the first shielding layer and the second shielding layer. The first shielding layer and the second shielding layer are set as metal layers. The nano-conductive layer is set as nano-conductive powder. The nano-conductive layer is set as a mixed conductive powder which is a mixture of metal conductive powder and non-metal conductive powder. The thickness range of the nano-conductive layer is 3 millimeters to 8 millimeters; At the terminals of the signal output terminal and the signal input terminal, there is a connecting part. A wire is electrically connected to the signal output terminal and the signal input terminal through the connecting part. The connecting part includes a conductive inner housing and an insulating outer housing. An elastic member connecting the conductive inner housing and the insulating outer housing is arranged between the conductive inner housing and the insulating outer housing. A connecting hole for inserting the wire is arranged in the middle of the conductive inner housing. The material of the conductive inner housing is configured as an elastic conductive material; On the outside of the electromagnetic shielding housing, there is a wiring fixing device connected to the electromagnetic shielding housing. The wiring fixing device is used to fix the wires connected to the signal output terminal and the signal input terminal; The wiring fixing device is set as a U-shaped buckle, and one end is fixed to the electromagnetic shielding housing. The other end of the U-shaped buckle is detachably connected to the electromagnetic shielding housing. The end of the U-shaped buckle connected to the electromagnetic shielding housing is set as a clamping protrusion. The electromagnetic shielding housing is provided with a clamping groove corresponding to the clamping protrusion. The material of the end of the U-shaped buckle connected to the electromagnetic shielding housing is configured as an elastic material.

2. The AC servo driver with stable working performance according to claim 1, characterized in that The electronic control board is arranged on the inner bottom surface of the electromagnetic shielding housing. There is a reinforcing protrusion between the electronic control board and the inner bottom surface of the electromagnetic shielding housing. The reinforcing protrusion is made of an elastic material; and / or The electronic control board is detachably connected to the electromagnetic shielding housing.

3. The AC servo driver with stable working performance according to claim 1, characterized in that, The inner diameter of the connecting hole gradually decreases along the insertion direction of the wire.

4. The AC servo driver with stable working performance according to claim 1, characterized in that, A temperature detection device is arranged inside the electromagnetic shielding housing. The temperature detection device is electrically connected to the display.

5. The AC servo driver with stable working performance according to claim 1, characterized in that, A semiconductor refrigerating sheet is also arranged inside the electromagnetic shielding housing. The semiconductor refrigerating sheet is arranged at a position close to the electronic control board.

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