KR200490519Y1 - Electromechanical equipment for electromagnetic interference suppression - Google Patents

Abstract

Electromechanical equipment for suppressing electromagnetic interference of the present invention includes a trunk line group, a mechanical device, an electric control device and a grounding system. The trunk line group is connected to the mechanical and electrical controls. The electrical control device includes a cabinet and a drive system installed in the cabinet, the drive system being connected to a motor of the mechanism. The grounding system includes a first ground path, a second ground path, a third ground path, a basesheet, and a ground terminal. The first ground path is connected to the mechanism and the ground terminal, the second ground path is connected to the cabinet and the ground terminal, and the third ground path is connected to the base sheet and the ground terminal. The basesheet is connected to the cabinet and is located inside the cabinet, and the ground end is located outside the cabinet. Among them, the drive system is fixedly connected to the basesheet, and the ground line of the drive system is connected to the basesheet. The resistance formed by the third ground path, the base sheet, and the ground terminal is smaller than the resistance formed by the connection of the base sheet and the cabinet.

Description

ELECTROMECHANICAL EQUIPMENT FOR ELECTROMAGNETIC INTERFERENCE SUPPRESSION}

The present invention relates to an electromechanical apparatus, and more particularly, to an electromechanical apparatus that suppresses electromagnetic interference through a grounding system.

Electromagnetic interference is an electromagnetic phenomenon caused by conduction and radiation along current or voltage, which can affect the performance of electromechanical equipment and, of course, can have a negative effect on the human body. The interference source of the electromagnetic interference is typically an external power system, environment or electromechanical equipment itself, and the electromechanical equipment itself includes a motor, an electric control device, a driving circuit, and the like.

In order to prevent the electromechanical equipment from being affected by the interference source, at present, the electromechanical equipment generally suppresses the interference source through various filters, but the power, control system, drive system or motor selection of various electromechanical equipment is selected. Since all of the uses are different, the filter is often not universal for various electromechanical equipment and must be newly designed one by one. In this case, not only is relatively time consuming, but also the filter can often lead to a situation where a relatively large space is required, which adds to the cost of the filter material.

As can be seen from the above, the current solution of the electromagnetic interference problem is to provide suppression measures for the areas where there may be a problem, not to provide a relatively comprehensive plan for the whole system, and therefore, different systems. Cannot have a common solution to

In view of the above drawbacks, an object of the present invention is to provide a good grounding system for electromechanical equipment, so that most of the interference sources are transmitted to the ground end, thereby preventing the interference sources in the electromechanical equipment from affecting each other. have. Grounding systems can be applied to different electromechanical equipment to suppress electromagnetic interference.

In order to achieve the above object, the electromechanical equipment for suppressing the electromagnetic interference of the present invention includes a relay line group, a mechanical device, an electric control device and a grounding system. The trunk line group is connected to the mechanical and electrical controls. The mechanical device includes a motor, and the electrical control device includes a cabinet and a power supply system, a control system and a drive system installed in the cabinet. The power supply system is connected to the control system and the drive system, and the drive system is connected to the motor. The grounding system includes a first ground path, a second ground path, a third ground path, a base sheet, and a ground terminal. The first ground path is connected to the mechanism and the ground terminal, the second ground path is connected to the cabinet and the ground terminal, and the third ground path is connected to the base sheet and the ground terminal. The basesheet is connected to the cabinet, located inside the cabinet, and the ground end is located outside the cabinet. Among them, the drive system is fixedly connected to the base sheet, and the ground line of the drive system is connected to the base sheet. The resistance formed by the third ground path, the base sheet, and the ground terminal is smaller than the resistance formed by the connection of the base sheet and the cabinet.

As such, the electromechanical equipment which suppresses the electromagnetic interference of the present invention allows the three main electromagnetic interference sources on the electromechanical equipment to be effectively transmitted to the ground terminal through the ground path through the grounding system, so that the interference source affects each system. In addition, the basesheet can effectively isolate the interference sources of the motor and the drive system to prevent the interference sources from floating around. Thus, the grounding system can be commonly used in electromechanical equipment, which can shorten product delivery by saving design cost and time.

Detailed structure, features, assembly or use of electromechanical equipment for suppressing electromagnetic interference provided by the present invention will be described in detail in the following embodiments. However, one of ordinary skill in the art of the present invention, the implementation of the above-described detailed description and specific embodiments listed in the present invention is merely to explain the present invention, not intended to limit the scope of the patent application of the present invention. You will understand.

1 is an explanatory diagram of an electromechanical apparatus for suppressing electromagnetic interference of the present invention.
2 is a block diagram of the electromechanical equipment for suppressing the electromagnetic interference of the present invention in FIG.
3 is a cross-sectional view of the composite transmission wire used in the first ground path in FIG.
4 to 7 are explanatory diagrams of respective embodiments of the base sheet of FIG. 2.
8 is a test result diagram in which the spectrum analyzer actually detects electromechanical equipment to which the grounding system of the present invention is not applied.
9 is a test result diagram in which the spectrum analyzer actually detects the electromechanical equipment to which the grounding system of the present invention is applied.

Hereinafter, the components and the effects achieved by the electromechanical equipment for suppressing the electromagnetic interference according to the present invention will be described by combining the respective drawings. However, the members, the size and the appearance of the electromechanical equipment for suppressing the electromagnetic interference in each of the drawings are merely for explaining the technical features of the present invention, not intended to limit the configuration of the present invention.

As shown in Figure 1 and 2, the electromechanical equipment 10 for suppressing electromagnetic interference of the present invention is a mechanical device 11, electric control device 13, trunk group (trunk group) 15 and ground A system 17 is included, and the group of trunk lines 15 is connected to the mechanical device 11 and the electrical control device 13.

The mechanism 11 may be a robot arm, a multi-axis motion machine, a linear motion machine, or the like, and therefore, the mechanism 11 may include six motors 111 for driving the mechanism 11 to perform various movements, or Other driving elements. The quantity of the motor 111 may be one or more than one.

The electric control device 13 transmits a control signal to the motor 111 of the mechanical device 11 through the relay line group 15 so that the mechanical device 11 executes a corresponding operation according to the control signal of the electric control device 13. Send it. In addition, the electric control device 13 may receive a feedback signal of the mechanical device 11 through the relay line group 15 to correct, determine or record a corresponding operation.

The electric control device 13 includes a cabinet 131, a power supply system 133, a control system 135, and a drive system 137. The cabinet 131 may have a hermetic, partially open structure.

The power supply system 133 and the control system 135 are each connected to the cabinet 131 and are also located in the cabinet 131. The power supply system 133 is connected to the control system 135 and the drive system 137 and includes a filter 1331 and a power supply 1333. The filter 1331 is connected to the AC input power and the power supply 1333 to filter power supply signals of the AC input power. The power supply 1333 supplies electricity to the control system 135 and the drive system 137. The control system 135 is for controlling the drive system 137.

The driving system 137 is connected to each motor 111 to drive the motor 111. The driving system 137 of the present embodiment includes six drivers 1372, and six drivers 1372 are connected one-to-one to the six motors 111 to control the motors 111. In other embodiments, the number of drivers 1372 and motors 111 may be more or less.

The grounding system 17 includes a first grounding path 171, a second grounding path 173, a third grounding path 175, a base sheet 177, and a grounding end 179. The connection method of the grounding system 17 of the present embodiment is made through a metal screw, and in other embodiments, the connection method may be made through a method capable of forming welding, riveting or other electrical connection.

The first ground path 171 is connected to the mechanism 11 and the ground end 179. In the present embodiment, the first ground path 171 is formed through the composite transmission wire (see Fig. 3), the composite transmission wire is a plurality of conductive wires (1713), ( 1715, and the wires 1713 and 1715 are wire rods of 14-25AWG standard.

In order to prevent the interference source from radiating out through the conductor, the first ground path 171 of the present embodiment selects one of the plurality of conductors and shields it around the selected conductor 1713. It is desirable to form a layer so that an externally located layer is isolated from interference of the interfering source through the shielding layer, and in embodiments the shielding layer is configured through the conductors 1715 around the conductors 1713. In other embodiments, the shielding layer may be formed around the selected conductors or may cover the selected conductors, such as by knitting a metal wire, covering the metal piece, or enclosing the surrounding wire.

2, the second ground path 173 is connected to the cabinet 131 and the ground end 179 of the electric control device 13, and the second ground path 173 is connected to the electric control device 13. The wire of 14-25AWG standard is selected and used so that the interference source of is transmitted to the ground terminal 179 through the second ground path 173. The ground end 179 is located outside the cabinet 131.

The third ground path 175 is connected to the base sheet 177 and the ground terminal 179. The third ground path 175 selects and uses a wire of 14-25AWG, and is connected in such a manner as to be connected together or to form other electrical connections through the screws in the base sheet 177.

The base sheet 177 is connected to the cabinet 131 and positioned in the cabinet 131, and the base sheet 177 and the cabinet 131 may be made of metal or partial metal. In this embodiment, the connection portion of the base sheet 177 and the cabinet 131 has a resistance or is substantially insulated, and having a resistance or being insulated generally is disadvantageous for transmission of an interference source (electrical signal). As such, the interference source can thus be transmitted in a ground (transmission) path that is relatively low in resistance or zero in resistance. In brief, the resistance formed by the third ground path 175, the base sheet 177, and the ground terminal 179 is much smaller than the resistance formed by the connection of the base sheet 177 and the cabinet 131.

In addition, the driving system 137 is fixed to the base sheet 177, and the ground line of the driving system 137 is connected to the base sheet 177. In this embodiment, the transmission circuit of the interference source of the drive system 137 is sequentially a ground line, a base sheet 177, a third ground path 175 and a ground end 179 of the drive system 137, and the drive system. The interference source of 137 is prevented from spreading outside.

In order to form a resistive or substantially insulated electrical property, as shown in FIG. 4, the basesheet 177 of the present invention has a plurality of supports extending downward from around the carrier 1773 and the carrier 1773. Feet 1773 and 1775, the carrier 1773 is for connecting and securing the drive system 137, the drive system 137 being located on the top surface of the carrier 1177, The bottom surface faces the cabinet 131 and maintains a predetermined distance from the cabinet 131. Support feet 1773, 1175 may be connected together or spaced apart from one another.

In this embodiment, the support feet 1773 and 1175 are divided into two types, the support feet 1773 have a sole 1777, and the support feet 1175 do not have a sole. The sole 1777 of each support foot 1773 has two through holes 17771, and the through holes 17771 are for fixing the screws to penetrate the cabinet 131. In this embodiment, the number of screws uses up to four to form a path with resistance, preventing the interference source from conducting through the screws to other places. Other types of support feet 1175 may choose to or may not be in contact with the cabinet 131, although support feet 1175 may have multiple openings 117751 to alter and degrade the transmission of the interferer. And the number of openings 17751 may be one or more than one, and the shape may be rectangular, circular, or other geometric shapes.

In addition, the contact surface of the sole 1777 of the support foot 1773 and the cabinet 131 is not flat or coated with an insulating material to form a contact surface having resistance or substantially insulated, whereby the interference source floats outward. Prevent from carrying

In this embodiment, the second ground path 173 and the third ground path 175 are connected to the cabinet 131 and then to the ground terminal 179 again, except that the first ground path 171 is the cabinet 131. ) Is not connected. In other words, the first ground path 171 is completely separated from the second ground path 173 and the third ground path 175 to prevent the interference source from floating in the electric control device 13. Completely disconnected means that the first ground path 171 is not connected to the electrical control device 13, but the same ground outside the electrical device 13 to prevent the interference source of the motor from interfering with the electrical control device 13. It can be connected to stage 179.

In other embodiments, the support feet 1773 of the basesheet 177 may be other structures as shown in FIGS. 5-7, and therefore, the structures and shapes of the basesheet 177 are embodiments listed in the specification. It is not limited to.

In FIG. 5, the support foot 1773 includes two hollow rings 117733 for screwing through to securely connect with the cabinet 131. The embodiment does not have the sole 1777 structure unlike FIG. 4. Do not. The hollow ring 17733 may be fixed to the support foot 1773 by welding or gluing. The quantity of the hollow ring 17733 may be more, and also the positional arrangement is not limited to this embodiment.

In FIG. 6, unlike the embodiment of FIG. 4, the support foot 1773 is not provided with a through hole in the sole 1777, and the sole 1777 is formed only at one side thereof, and the sole 1777 is cabinetd by bonding or welding. 131 is fixed to connect.

The support foot 1773 of FIG. 7 also does not have a sole 1777 structure as compared to FIG. 4, and thus, the bottom edge of the support foot 1773 of the embodiment is connected and fixed to the cabinet 131 through bonding or welding. Can be.

As shown in FIGS. 8-9, FIG. 8 is a test result diagram in which a frequency spectrum analyzer actually detects electromechanical equipment that does not apply the grounding system of the present invention, and FIG. 9 is a grounding system of the present invention. It is a test result that actually detected the electromechanical equipment which applied the. The range tested by the spectrum analyzer is 150K-30MHz, and the test results of FIG. 8 show that a plurality of frequency sections exceeded the safety rules. However, the test results of FIG. 9 clearly indicate that all frequency sections are lower than the safety rules. I can tell.

In this way, the electromechanical equipment for suppressing the electromagnetic interference of the present invention is to meet the safety rules by allowing the interference source to be effectively transmitted to the ground through the grounding system in consideration of the overall system. Therefore, the grounding system of the present invention can reduce the suppression measures (for example, the filter) for the part which may be problematic, thereby improving production efficiency and reducing manufacturing and material costs.

Finally, it should be emphasized again that the components disclosed in the above-described embodiments of the present invention are merely illustrative, and are not intended to limit the scope of the present invention, and to replace or change other equivalent elements. It should also be included in the patent application scope of the present invention.

10: Electromechanical equipment to suppress electromagnetic interference 11: Mechanism
13: electric controller 15: relay line group
17: grounding system 111: motor
131: cabinet 133: power supply system
135: control system 137: drive system
171: first ground path 173: second ground path
175: third ground path 177: base sheet
179: grounding stage 1331: filter
1333: power supply 1371: driver
1711: insulation layers 1713, 1715: lead wire
1771: carrier 1773, 1775 support feet
1777: sole 17733: hollow ring
17751: opening 17771: through hole

Claims (6)

In electromechanical equipment that suppresses electromagnetic interference,
Trunk line group;
A mechanical device connected to the relay line group and including a motor;
A power supply system, a control system, and a driving system connected to the relay line group and installed in the cabinet, wherein the power supply system is connected to the control system and the driving system, and the driving system is the motor. An electrical control device connected to the; And
A first ground path, a second ground path, a third ground path, a base sheet, and a ground end, wherein the first ground path is connected to the mechanism and the ground end, and the second ground path is connected to the cabinet and A ground connected to the ground terminal, the third ground path connected to the base sheet and the ground terminal, the base sheet connected to the cabinet, located inside the cabinet, and the ground terminal located outside the cabinet. system
Including;
Among them, the driving system is fixedly connected to the base sheet, the ground line of the driving system is connected to the base sheet, and the resistance formed by the third ground path, the base sheet and the ground terminal is the base sheet and Much smaller than the resistance formed by the connection of the cabinet,
Electromechanical equipment. The method of claim 1,
The base sheet includes a carrier, a plurality of support feet, the drive system is located on an upper surface of the carrier, the bottom surface of the carrier is spaced apart from the cabinet, the plurality of support feet from around the carrier Extending down and fixedly connected to the cabinet. The method of claim 2,
One of the plurality of support feet is provided with a sole, the sole is connected to the cabinet, electromechanical equipment. The method of claim 3,
The sole has at least one through hole for connection and fixation to the cabinet via screws. The method of claim 2,
The support foot comprises an opening. The method of claim 1,
The first ground path is a composite transmission wire, wherein the composite transmission wire includes a plurality of conductive wires and an insulating layer, wherein the plurality of conductive wires are covered by the insulating layer to insulate each other, and one of the plurality of conductive wires 1. A ground wire, wherein the first ground wire is closest to an outer surface of the insulating layer and has a shielding layer formed around the other plurality of conductors.

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