CN116896251A - Controller for controlling a power supply - Google Patents

Controller for controlling a power supply Download PDF

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Publication number
CN116896251A
CN116896251A CN202310317094.4A CN202310317094A CN116896251A CN 116896251 A CN116896251 A CN 116896251A CN 202310317094 A CN202310317094 A CN 202310317094A CN 116896251 A CN116896251 A CN 116896251A
Authority
CN
China
Prior art keywords
terminal block
power input
frame
input unit
power supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310317094.4A
Other languages
Chinese (zh)
Inventor
森山克也
斋地正义
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nidec Instruments Corp
Original Assignee
Nidec Sankyo Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nidec Sankyo Corp filed Critical Nidec Sankyo Corp
Publication of CN116896251A publication Critical patent/CN116896251A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
    • H01R4/64—Connections between or with conductive parts having primarily a non-electric function, e.g. frame, casing, rail
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/003—Constructional details, e.g. physical layout, assembly, wiring or busbar connections
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0247—Electrical details of casings, e.g. terminals, passages for cables or wiring
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/04—Metal casings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Rectifiers (AREA)
  • Inverter Devices (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)

Abstract

And the noise resistance of the controller is improved. The controller (1) has a metal housing (2) and a power supply input unit (3) for inputting an alternating current from an external power supply. The controller (1) converts an alternating current supplied from a power supply input unit (3) into a direct current, and generates a drive current to be output to the outside. The power supply input unit (3) is provided with: a power input terminal block (4) disposed in the housing (2); and a noise filter to which an alternating current is input via a power supply input terminal block (4). The housing (2) is provided with: a main frame (20) provided with a power input unit (3); and a frame ground terminal block (10) for connecting the protection ground lines (PE 1-PE 5) of the power supply input unit (3) and the ground lines (GL 1, GL 2) of the AC power supply. The frame ground terminal block (10) and the main frame (20) are made of the same metal, and are welded in a state in which the substrate surfaces on which the plating film is not formed are in contact with each other.

Description

Controller for controlling a power supply
Technical Field
The present invention relates to a controller having a metal housing.
Background
Patent document 1 describes, as a controller for controlling a robot, a controller in which various units such as a control circuit board, a drive circuit board, a communication interface board, a drive voltage generation board, and a power circuit board are housed in a metal casing.
The controller of patent document 1 is provided with an external power supply connector and a circuit protector for switching between supply and interruption of 200V ac current inputted from the external power supply connector on a front panel of a housing, and a unit of a power supply system such as a drive voltage generation board and a power supply circuit board is provided inside the housing, the unit of the power supply system being provided with a noise filter for removing noise from ac current and a dc/ac conversion circuit for converting the ac current from which noise has been removed into dc current.
Prior art literature
Patent literature
Patent document 1: japanese patent No. 5803213
In the controller, in order to suppress noise in an alternating current supplied from an external power source, a structure is adopted in which a metal frame is grounded as a frame to release noise. For example, a frame ground terminal block is provided in a frame by fixing a metal terminal block member to a metal plate fixed to the frame of the frame with screws. Each unit of the power supply system is grounded to the frame via a frame ground wire routed between the unit and the frame ground terminal block.
However, when the frame ground terminal block is provided in the frame body, noise resistance may be insufficient depending on the structure of the frame ground terminal block. For example, if the contact resistance between the terminal block member and the metal panel on the housing side is large, noise or surge cannot be completely released.
Disclosure of Invention
In view of the above, an object of the present invention is to improve noise resistance of a controller.
In order to solve the above problems, a controller according to the present invention includes: a metal frame; a power input unit to which an alternating current is input from an external power source; a dc-ac conversion circuit that converts an ac current supplied from the power supply input unit into a dc current; and a drive current generation unit that generates a drive current to be output to the outside based on the direct current supplied from the direct current-alternating current conversion circuit, wherein the power supply input unit includes: a power input terminal block disposed in the housing; and at least one noise filter to which an alternating current is input via the power input terminal block, wherein the housing includes: a main frame provided with the power input part; and a frame ground terminal block connected to the protective ground of the power input unit, wherein the frame ground terminal block and the main frame are made of the same metal, and are welded in a state in which the substrate surfaces on which the plating film is not formed are in contact with each other.
According to the present invention, the frame ground terminal block made of the same metal as the main frame is welded to the main frame, which is a large-capacity member among metal members constituting the frame body of the controller. At this time, welding is performed in a state where the substrate surfaces on which the plating film is not formed are in contact with each other. In this way, by directly fixing the frame ground terminal block to the main frame, the ground resistance can be reduced as compared with a case where other members are interposed between the main frame and the frame ground terminal block. In addition, by bringing the substrate surfaces on which the plating film is not formed into contact with each other, the contact resistance between the main frame and the frame ground terminal block can be reduced. By reducing the ground resistance, noise is easily released from the frame ground terminal block, and thus noise resistance is improved. Further, the fixing by welding can reliably make contact, and variation in contact resistance due to variation in screw tightening torque at the time of screw fixing can be eliminated. Therefore, variation in noise resistance can be suppressed. Thus, the noise filter can be simplified to obtain necessary noise resistance, and thus cost reduction of the noise filter can be achieved. Further, since the holes for screw fixation can be reduced, the size and the component cost of the frame ground terminal block can be reduced, and the risk of erroneous disassembly of the frame ground terminal block can be avoided.
In the present invention, it is preferable that the main frame includes a power input unit installation surface on which the power input unit is installed, and the frame ground terminal block is disposed on the power input unit installation surface. Thus, the power input unit and the frame ground terminal block are disposed on the same surface. Therefore, workability in winding and connecting the frame ground wire of the power input portion to the frame ground terminal block can be improved.
In the present invention, it is preferable that the main frame includes a bottom plate of the frame body and a frame-shaped frame body frame connected to an outer edge of the bottom plate, the power input unit installation surface is provided on the bottom plate, and the frame ground terminal block is arranged on the outer edge of the bottom plate. Thus, the frame ground terminal block can be easily accessed by removing the outer surface panel fixed to the frame body frame. Therefore, the workability in connecting the protection earth wire to the frame ground terminal block can be improved.
In the present invention, it is preferable that the frame ground terminal block includes a fixing plate that abuts against the bottom plate and a tilt plate that extends along an outer edge of the bottom plate, and the protection ground wire is fixed to the tilt plate, and the tilt plate is tilted in a direction away from the bottom plate as approaching the power input unit from the outer edge. Thus, when the frame ground terminal block disposed on the bottom plate is viewed obliquely from above, the fixing surface (i.e., the inclined plate) for fixing the protection ground wire can be seen. Therefore, workability in connection with the protection ground line can be improved.
In the present invention, the power input terminal block is preferably disposed at a front end of the power input unit on the frame ground terminal block side. In this way, the distance between the power input terminal block and the frame ground terminal block can be made closer. Therefore, the operation of connecting the protection ground of the power input terminal block to the frame ground terminal block can be easily performed. In addition, since the power input terminal block and the frame ground terminal block can be disposed intensively at the tip of the power input section, wiring work can be performed efficiently.
In the present invention, it is preferable that the power supply cable introduced into the housing includes a power supply line for supplying an ac current from an ac power source, the power supply line is connected to the power supply input terminal block, and a ground line connected to a ground terminal of the ac power source, the ground line is connected to the frame ground terminal block. By directly connecting the ground wire of the ac power supply to the frame ground terminal block in this way, the frame can be effectively grounded through the ground wire. Therefore, by concentrating the protective ground of the power input portion on the frame ground terminal block, the power input portion can be effectively grounded through the ground via the frame ground terminal block.
In the present invention, it is preferable that the power supply input unit includes a circuit breaker for wiring disposed on a current supply path connecting the power supply input terminal block and the noise filter, and the frame ground terminal block is connected to a protection ground of the power supply input terminal block and a protection ground of the noise filter. In this way, most of the protection ground of the power input unit is concentrated on the frame ground terminal block. Therefore, by connecting the ground of the ac power supply to the frame ground terminal block, most of the electronic components constituting the power supply input unit are grounded via the frame ground terminal block by the ground, so that the noise resistance can be improved. In addition, the noise filter can be simplified, and cost reduction can be achieved.
In this case, the power supply input unit preferably includes a surge protector disposed on a current supply path connecting the power supply input terminal block and the noise filter, and a protection ground line of the surge protector is directly connected to the frame ground terminal block or is connected to the frame ground terminal block via the power supply input terminal block. In this way, even when a surge protector is added, the surge protector is grounded via the frame ground terminal block, similarly to other electronic components. Therefore, noise resistance can be improved.
In the present invention, it is preferable that the power supply input unit includes a distribution connector for distributing the ac current passing through the noise filter, and the frame ground terminal block is connected to a protection ground of the power supply input terminal block, a protection ground of the noise filter, and a protection ground of the distribution connector. In this way, noise of the alternating current supplied from the distribution connector can be reduced, and thus noise resistance can be further improved.
In the present invention, the power input unit preferably includes: a first power supply input section that supplies an alternating current for generating a driving current; and a second power input unit that supplies an alternating current for generating a control current having a voltage different from the drive current, wherein the first power input unit includes a first wiring breaker and at least one of the noise filters, the second power input unit includes a second wiring breaker, at least one of the noise filters, and a distribution connector, the protection ground of the power input terminal block, the protection ground of each noise filter provided on the first power input unit, the protection ground of each noise filter provided on the second power input unit, and the protection ground of the distribution connector are connected directly to the frame ground terminal block, or connected to the frame ground terminal block via the power input terminal block. In this way, the electronic component constituting the first power input unit and the electronic component constituting the second power input unit are grounded via the frame ground terminal block, respectively, and thus noise of the control current and the driving current can be reduced.
According to the present invention, the frame ground terminal block made of the same metal as the main frame is welded to the main frame, which is the largest of the metal members constituting the frame body of the controller. At this time, welding is performed in a state where the substrate surfaces on which the plating film is not formed are in contact with each other. By directly fixing the frame ground terminal block to the main frame in this way, the ground resistance can be reduced as compared with a case where another member is interposed between the main frame and the frame ground terminal block. In addition, by bringing the substrate surfaces on which the plating film is not formed into contact with each other, the contact resistance between the main frame and the frame ground terminal block can be reduced. By reducing the ground resistance, noise is easily released from the frame ground terminal block, and thus noise resistance is improved. Further, the fixing by welding can reliably make contact, and variation in contact resistance due to variation in screw tightening torque at the time of screw fixing can be eliminated. Therefore, variation in noise resistance can be suppressed. Thus, the noise filter can be simplified to obtain necessary noise resistance, and thus cost reduction of the noise filter can be achieved. Further, since the holes for screw fixation can be reduced, the size and the component cost of the frame ground terminal block can be reduced, and the risk of erroneous disassembly of the frame ground terminal block can be avoided.
Drawings
Fig. 1 is an external perspective view of a controller to which the present invention is applied.
Fig. 2 is a partial perspective view of the controller with the interface panel and side panels removed.
Fig. 3 is a sectional view of the controller (a sectional view cut at A-A of fig. 1) and a partial enlarged view thereof.
Fig. 4 is a block diagram schematically showing a power supply input section.
Fig. 5 is an enlarged perspective view of the main frame and the power input section as seen from the front side.
Fig. 6 is a perspective view of a portion of the main frame to which the frame ground terminal block is fixed.
Fig. 7 is a perspective view of the frame ground terminal block viewed obliquely from above and obliquely below.
Fig. 8 is a noise waveform diagram of a noise terminal voltage test in the controller of the present embodiment and the controller of the conventional example.
Fig. 9 is a perspective view showing a connection method of the protection ground wire in the case of using the frame terminal block of the modification.
Detailed Description
Hereinafter, embodiments of a controller to which the present invention is applied will be described with reference to the drawings. The controller 1 of the present embodiment is a device that supplies power to a robot (manipulator) provided with an actuator such as a motor.
Fig. 1 is an external perspective view of a controller 1 to which the present invention is applied. Fig. 2 is a partial perspective view of the controller 1 with the interface panel 21A and the side plates 24 removed. Fig. 3 is a sectional view (sectional view cut at A-A position of fig. 1) of the controller 1 and a partial enlarged view thereof.
In the present specification, the three directions XYZ are directions orthogonal to each other. In the present specification, for convenience, the Z direction is set as the up-down direction of the controller 1. The Z1 direction is the lower direction, and the Z2 direction is the upper direction. The X direction is the front-rear direction of the controller 1. The X1 direction is the front and the X2 direction is the rear. The Y direction is the width direction of the controller 1. The Y1 direction and the Y2 direction are one side and the other side of the Y direction. In addition, in an actual usage mode of the controller 1, the Z direction may not coincide with the up-down direction (vertical direction).
(integral structure)
As shown in fig. 1 to 3, the controller 1 includes a metal housing 2. The housing 2 is a rectangular parallelepiped, and includes a front surface 2a and a rear surface 2b oriented in the X1 direction, a side surface 2c and a side surface 2d oriented in the Y1 direction and the Y2 direction, a bottom surface 2e and a top surface 2f oriented in the Z1 direction, respectively. In the present embodiment, the members constituting the housing 2 include: 3 interface panels 21A, 21B, 21C arranged on the front face 2 a; a back plate 22 disposed on the back surface 2 b; a side plate 23 disposed on the Y1 side surface 2 c; a side plate 24 disposed on the Y2 side surface 2 d; a top plate 25 disposed on the top surface 2 f; and a main frame 20.
The main frame 20 is a member formed integrally of a bottom plate 26 disposed on the bottom surface 2e and a rectangular parallelepiped frame 27 connected to the outer edge of the bottom plate 26. The interface panels 21A, 21B, 21C, the back panel 22, the side panels 23, 24, and the top panel 25 are outer surface panels of the housing 2, and are detachably fixed to the housing frame 27.
As shown in fig. 2, the frame body frame 27 includes a rectangular frame-shaped front frame 27A, a side frame 27B, and a top frame 27C. Interface panels 21A, 21B, and 21B are fixed to the front frame 27A. A top plate 25 is fixed to the top frame 27C. A Y2 side plate 24 is fixed to the side frame 27B. The front frame 27A and the side frame 27B stand up in the Z2 direction from the outer edge of the bottom plate 26, and are connected to the outer edge of the top frame 27C. The frame 27 includes a back frame for fixing the back plate 22 and a side frame (not shown) for fixing the Y1 side plate 23.
The controller 1 includes a power supply input unit 3 for inputting an ac current from an external power supply. As shown in fig. 2 and 3, the power input unit 3 is disposed inside the interface panel 21A in the internal space of the housing 2, and the interface panel 21A is disposed at the end of the front surface of the housing on the Y2 side. As shown in fig. 1 and 3, 2 power supply cables 40 of an external ac power supply are led into the housing 2 from the sleeve 28 mounted on the interface panel 21A.
The controller 1 includes: a dc-ac conversion circuit (not shown) that converts a part of the ac current supplied from the power supply input unit 3 into a dc current of a predetermined voltage; and a drive current generation unit (not shown) that generates a drive current to be output to the outside based on the dc current supplied from the dc-ac conversion circuit. A circuit board and electronic components constituting the dc/ac conversion circuit and the drive current generation unit are disposed in the housing 2. The drive current generation unit is connected to an external output connector 29 (see fig. 1) provided on the interface panel 21C. When the manipulator-side connector is connected to the external output connector 29, a driving current is supplied to the manipulator.
The controller 1 includes a communication board (not shown) disposed in the housing 2, a control circuit board (not shown), and a cooling fan 6. The plurality of external connection connectors 30 disposed at the end of the communication board are disposed in holes provided in the interface panel 21B. A plurality of fans 6 are disposed inside the back plate 22. As shown in fig. 2, one of the fans 6 is disposed behind (on the X2 side of) the power input unit 3.
(Power input section)
Fig. 4 is a block diagram schematically showing the power supply input section 3. Fig. 5 is a perspective view of the main frame 20 and the power input section 3 from the front side (X1 side). As shown in fig. 4, the power input unit 3 includes a power input terminal block 4, and a first power input unit 5A and a second power input unit 5B to which alternating current is supplied via the power input terminal block 4.
As shown in fig. 4, 1 of the 2 power supply cables 40 led into the housing 2 includes: 3 power supply lines 40A for supplying three-phase alternating current for a driving power supply; and 1 ground line GL1 connected to the ground terminal of the external ac power supply. The second power supply cable 40 includes: 2 power supply lines 40B for supplying two-phase alternating current for controlling power supply; and 1 ground line GL2 connected to the ground terminal of the external ac power supply. The 3 power supply lines 40A and 2 power supply lines 40B are connected to the power supply input terminal block 4. As described later, the ground lines GL1 and GL2 are connected not to the power input terminal block 4 but to the frame ground terminal block 10 (see fig. 5).
The alternating current of 200V inputted to the power input section 3 is supplied to the first power input section 5A and the second power input section 5B via the power input terminal block 4. Three-phase ac current as a driving power source is input to the first power source input unit 5A via the power supply line 40A and the power source input terminal block 4. The two-phase alternating current serving as the control power is input to the second power input unit 5B via the power supply line 40B and the power input terminal block 4.
As shown in fig. 4, the first power supply input unit 5A includes a first wiring breaker 51, a first surge protector 52, a first noise filter 53, and a second noise filter 54. The first noise filter 53 and the second noise filter 54 are provided with filter circuits for removing noise superimposed on the alternating current supplied to the first power supply input section 5A. The first wiring breaker 51 is a fuse-less breaker. The first wiring breaker 51 and the first surge protector 52 are disposed on a current supply path connecting the power input terminal block 4 and the first noise filter 53.
The second power input unit 5B includes a second wiring breaker 55, a second surge protector 56, a third noise filter 57, and a distribution connector 58. The third noise filter 57 is provided with a filter circuit for removing noise superimposed on the alternating current supplied to the second power supply input section 5B. The second wiring breaker 55 is a circuit protector. The second wiring breaker 55 and the second surge protector 56 are disposed on a current supply path connecting the power input terminal block 4 and the third noise filter 57.
The distribution connector 58 distributes the alternating current output from the second noise filter 54 to a plurality of supply destinations. The alternating current distributed from the distribution connector 58 is converted into a control current having a voltage different from the driving current. For example, the ac current distributed from the distribution connector 58 generates 24V dc current supplied to the fan 6 and 5V dc current supplied to the control circuit substrate.
The power input unit 3 is a unit having a shape elongated in the X direction as a whole. As shown in fig. 2 and 4, the power input terminal block 4 is disposed at the front end (X1 side end) of the power input unit 3. The first wiring breaker 51 and the second wiring breaker 55 are arranged in parallel on the upper side (Z2 side) of the power input terminal block 4 at the front end (end on the X1 side) of the power input unit 3. As shown in fig. 3, the first surge protector 52 is disposed behind (on the X2 side of) the first wiring breaker 51. As shown in fig. 2, the second surge protector 56 is disposed behind (on the X2 side of) the second wiring breaker 55. The tip ends of the first and second wiring breakers 51 and 55 protrude forward (in the X1 direction) from the power input terminal block 4, and are disposed in the opening 31 (see fig. 1) of the interface panel 21A. The power input terminal block 4 is disposed inside the interface panel 21A.
As shown in fig. 3, the first noise filter 53 and the second noise filter 54 are arranged in the front-rear direction (X direction) at the rear (X2 side) of the Y1 side portion of the power input terminal block 4. The first noise filter 53 is disposed at the rear (X2 side) of the power input terminal block 4, and the second noise filter 54 is disposed at the rear (X2 side) of the first noise filter 53.
As shown in fig. 2, the third noise filter 57 and the distribution connector 58 are arranged in the front-rear direction (X direction) at the rear (X2 side) of the Y2 side portion of the power input terminal block 4. The third noise filter 57 is disposed at the rear (X2 side) of the power input terminal block 4, and the distribution connector 58 is disposed at the rear (X2 side) of the third noise filter 57. As shown by a broken line in fig. 3, the third noise filter 57 is disposed in a position juxtaposed in the Y direction with the first noise filter 53. The distribution connector 58 is disposed in a position juxtaposed in the Y direction with the rear end portion of the second noise filter 54.
The power input unit 3 is unitized by screwing the power input terminal block 4, the electronic components constituting the first power input unit 5A, and the electronic components constituting the second power input unit 5B onto the metal base plate 60. The main frame 20 includes a power input unit installation surface 32 on which the power input unit 3 is installed. The power input unit 3 is fixed to the main frame 20 by screwing the base plate 60 to the power input unit installation surface 32. Therefore, as shown in fig. 2 and 3, the power input unit installation surface 32 is provided on the bottom plate 26.
The base plate 60 includes: a first plate portion 61 parallel to the bottom plate 26; and a second plate portion 62 bent in the Z2 direction from the X1 side end portion of the first plate portion 61. As shown in fig. 2 and 3, the power input terminal block 4, the first wiring breaker 51, the first surge protector 52, the second wiring breaker 55, and the second surge protector 56 are fixed to the second plate portion 62. The power input terminal block 4, the first wiring breaker 51, and the second wiring breaker 55 are disposed on the X1 side of the second plate portion 62, and the first surge protector 52 and the second surge protector 56 are disposed on the X2 side of the second plate portion 62. The first plate portion 61 is fixed with a first noise filter 53, a second noise filter 54, a third noise filter 57, and a distribution connector 58.
(frame ground terminal block)
In the present embodiment, the protection ground line PE1 of the power input terminal block 4, the protection ground line PE2 of the first noise filter 53, the protection ground line PE3 of the second noise filter 54, the protection ground line PE4 of the third noise filter 57, the protection ground line PE5 of the distribution connector 58, the protection ground line PE6 of the first surge protector 52, and the protection ground line PE7 of the second surge protector 56 are led out from the power input section 3 in the X1 direction.
The housing 2 includes 5 (protection grounds PE1 to PE 5) out of 7 protection grounds connected to the power input unit 3, and a frame ground terminal block 10 for the grounds GL1 and GL2 of the power supply cable 40. As shown in fig. 2, 3, and 5, the frame ground terminal block 10 is disposed on the outer edge of the bottom plate 26 on the X1 side. Therefore, when the interface panel 21A is detached from the main frame 20, the frame ground terminal block 10 is disposed at a position easily accessible from the opening of the front frame 27A.
The frame ground terminal block 10 is disposed on the front side (X1 side) of the power input unit 3, and is disposed on the power input unit mounting surface 32 at a position adjacent to the power input unit 3 in the front-rear direction (X direction). Therefore, the power input terminal block 4 and the frame ground terminal block 10 disposed at the end of the power input unit 3 on the X1 side are disposed at positions adjacent to each other in the front-rear direction (X direction).
The frame ground terminal block 10 is made of the same metal material as the main frame 20. In the present embodiment, the frame ground terminal block 10 and the main frame 20 are composed of SPCC (cold rolled steel sheet). The frame ground terminal block 10 is fixed to the main frame 20 by welding. The frame ground terminal block 10 and the main frame 20 are welded in a state before the plating process is performed, and the plating process is performed after the welding. Therefore, the frame ground terminal block 10 and the main frame 20 are welded in a state where the substrate surfaces that have not been subjected to the plating treatment are in contact with each other.
Fig. 6 is a perspective view of a portion of the main frame 20 to which the frame ground terminal block 10 is fixed. Fig. 7 is a perspective view of the frame ground terminal block 10 viewed obliquely from above and below. As shown in fig. 3, 6, and 7, the frame ground terminal block 10 includes: a fixing plate 11 abutting against the bottom plate 26; an inclined plate 13 provided with a plurality of screw holes 12; and a connection plate 14 connecting the fixing plate 11 and the inclined plate 13. The fixing plate 11 extends in the Y direction. The fixing plate 11 is in contact with the bottom plate 26 in a state where the plating process is not performed, and is welded to the bottom plate 26. The connection plate 14 includes: a side plate 15 bent substantially at right angles from the X1 side end of the fixed plate 11 and standing up in the Z2 direction; and a top plate 16 bent at a substantially right angle from the X1 side end of the side plate 15 and extending in the X1 direction, and the inclined plate 13 extends from the X1 side end of the top plate 16 toward the outer edge of the bottom plate 26.
The inclined plate 13 extends in the Y direction along the outer edge of the X1 side of the bottom plate 26. The inclined plate 13 forms a ground wire fixing surface, and is provided with a plurality of screw holes 12 for fixing the protection ground wires PE1 to PE5 and the ground wires GL1, GL2. The inclined plate 13 is inclined at an angle of 45 degrees or an angle close to 45 degrees with respect to the bottom plate 26. More specifically, the inclined plate 13 is inclined in a direction away from the bottom plate 26 (Z2 side) from the outer edge side of the bottom plate 26 toward the inner side (X2 side) of the bottom plate 26. That is, when the interface panel 21A is removed and viewed obliquely from above, the inclined plate 13 is inclined in a direction in which the protection ground lines PE1 to PE5 and the ground lines GL1 and GL2 are easily screwed, at an angle at which the screw hole 12 is visible from the front.
The frame ground terminal block 10 is provided with 7 screw holes 12. Of the 7 protection ground lines, 5 (protection ground lines PE1 to PE 5) and the ground lines GL1 and GL2 of the power supply cable 40 are fixed by screws (not shown) made of conductive metal to 1 of 7 screw holes 12 arranged in 1 row on the inclined plate 13. The protection ground line PE6 of the first surge protector 52 and the protection ground line PE7 of the second surge protector 56 are connected to the power input terminal block 4, and are connected to the frame ground terminal block 10 via the power input terminal block 4 and the protection ground line PE 1.
As described above, since the power input terminal block 4 is disposed adjacent to the frame ground terminal block 10, the routing path of the protection ground line PE1 of the power input terminal block 4 is short. Further, since the first surge protector 52 and the second surge protector 56 are fixed to the second plate portion 62 of the base plate 60 on the Z2 side of the power supply input terminal block 4, the routing paths of the frame ground lines FG6, FG7 of the first surge protector 52 and the second surge protector 56 are short.
As shown in fig. 3, the first noise filter 53, the second noise filter 54, the third noise filter 57, and the distribution connector 58 are arranged on the opposite side (X2 side) of the frame ground terminal block 10 with respect to the power input terminal block 4. Therefore, the protection grounds PE2 to PE5 are drawn forward from the rear of the power input terminal block 4 through the side (Y2 side) of the power input terminal block 4, and thus the routing paths of the protection grounds PE6 and PE7 are simple and relatively short.
(noise terminal Voltage test)
Fig. 8 is a noise waveform diagram of a noise terminal voltage test in the controller of the present embodiment and the controller of the conventional example. Fig. 8 (a) is a noise waveform diagram of a noise terminal voltage test in the controller of the conventional example, and fig. 8 (b) is a noise waveform diagram of a noise terminal voltage test in the controller of the present embodiment. Unlike the present embodiment, the controller of the conventional example has a structure in which a frame ground terminal block after plating is screwed to a frame member after plating.
The noise terminal voltage test is performed by inserting an analog power supply circuit network (Line Impedance Stabilization Network) between the controller 1 and the ac power supply in the shielded room, and measuring noise output to a measurement terminal of the analog power supply circuit network by a spectrum analyzer. In the noise waveform diagrams of fig. 8 (a) and 8 (b), the horizontal axis represents frequency, and the vertical axis represents noise level. The limit value (QP) and the limit value (AV) shown in fig. 8 (a) and 8 (b) are values based on the general EMC standard (EN 61000-6-4class a).
As is clear from the noise waveform diagram of fig. 8 (a), the controller of the conventional example has only 0.2dB of margin with respect to the limit value at the frequencies F1 and F2, and thus the noise is not completely eliminated. On the other hand, as is clear from the noise waveform diagram in fig. 8 (b), the controller 1 of the present embodiment has a margin of 5dB or more with respect to the limit value at the frequencies F1 and F2, and is at an allowable level. Therefore, by adopting the structure of the frame ground terminal block 10 of the present embodiment, the noise resistance performance is improved as compared with the conventional example.
(main effects of the present embodiment)
As described above, the controller 1 of the present embodiment includes: a metal frame 2; a power supply input unit 3 for inputting an alternating current from an external power supply; a dc-ac conversion circuit for converting the ac current supplied from the power supply input unit 3 into a dc current; and a drive current generation unit that generates a drive current to be output to the outside based on the direct current supplied from the direct current-alternating current conversion circuit. The power supply input unit 3 includes: a power input terminal block 4 disposed in the housing 2; and noise filters (a first noise filter 53, a second noise filter 54, a third noise filter 57) to which alternating current is input via the power supply input terminal block 4. The housing 2 includes: a main frame 20 provided with a power input section 3; and a frame ground terminal block 10 connected to the protection grounds PE1 to PE5 of the power input section 3. The frame ground terminal block 10 and the main frame 20 are made of the same metal, and are welded in a state where the substrate surfaces on which the plating films are not formed are in contact with each other.
In the present embodiment, the frame ground terminal block 10 is directly fixed to the main frame 20, and the main frame 20 is a member having a large capacity among metal members constituting the housing 2 of the controller 1, so that the ground resistance is smaller than in the case where other members are interposed between the main frame 20 and the frame ground terminal block 10. Further, the contact resistance between the main frame 20 and the frame ground terminal block 10 is small because the substrate surfaces on which the plating film is not formed are brought into contact with each other and welded. Therefore, noise is easily released from the frame ground terminal block 10, and thus noise resistance is high. Further, since the frame ground terminal block 10 is fixed by welding, contact can be reliably made, fluctuation in contact resistance due to variation in screw tightening torque at the time of screw fixation can be eliminated, and variation in noise resistance can be suppressed. Thus, the noise filter can be simplified to obtain necessary noise resistance, and thus cost reduction of the noise filter can be achieved. Further, since the holes for screw fixation can be reduced from the frame ground terminal block 10, the size and the component cost of the frame ground terminal block 10 can be reduced, and the risk of erroneous disassembly of the frame ground terminal block 10 can be avoided.
In the present embodiment, the frame ground terminal block 10 is disposed on the power input unit installation surface 32 of the main frame 20. By disposing the power input unit 3 and the frame ground terminal block 10 on the same surface in this way, the frame ground terminal block 10 can be disposed in the vicinity of the power input unit 3, and therefore, workability in connecting the protection earth wires PE1 to PE5 of the power supply unit to the frame ground terminal block 10 by winding is good.
In the present embodiment, the main frame 20 includes the bottom plate 26 of the frame 2 and the frame-shaped frame 27 connected to the outer edge of the bottom plate 26, and therefore, the capacity is the largest among the metal members constituting the frame 2. The base plate 26 is provided with a power input unit installation surface 32, and the frame ground terminal block 10 is disposed on the outer edge of the base plate 26. In such a configuration, the frame ground terminal block 10 can be easily accessed by removing the outer surface panel (for example, the interface panel 21A) fixed to the frame body frame 27. Therefore, workability in connecting the protection earth wires PE1 to PE5 to the frame ground terminal block 10 is good.
In the present embodiment, the frame ground terminal block 10 includes: a fixing plate 11 abutting against the bottom plate 26; and an inclined plate 13 extending along the outer edge of the bottom plate 26. The inclined plate 13 constitutes a frame ground wire fixing surface. The inclined plate 13 is inclined in a direction away from the bottom plate 26 as approaching the power input unit 3 from the outer edge. Therefore, when the frame ground terminal block 10 arranged on the bottom plate 26 is viewed obliquely from above, the screw hole 12 of the inclined plate 13 can be seen from the front, and therefore, workability in connecting the protection grounds PE1 to PE5 is good.
In the present embodiment, since the power input terminal block 4 is disposed at the front end of the power input unit 3 on the frame ground terminal block 10 side (i.e., on the X1 side), the power input terminal block 4 is closely spaced from the frame ground terminal block 10. Therefore, the frame ground line FG1 of the power input terminal block 4 and the frame ground terminal block 10 can be easily connected. Further, since the power input terminal block 4 and the frame ground terminal block 10 are intensively arranged on the front end side (X1 side) of the power input unit 3, wiring work can be efficiently performed.
In the present embodiment, the power supply cable 40 introduced into the housing 2 includes power supply lines 40A and 40B for supplying an ac current from an ac power source and ground lines GL1 and GL2 connected to the ground terminal of the ac power source, the power supply lines 40A and 40B are connected to the power supply input terminal block 4, and the ground lines GL1 and GL2 are connected to the frame ground terminal block 10. In this way, by directly connecting the ac power supply ground lines GL1, GL2 to the frame ground terminal block 10, the frame can be effectively grounded through the ground lines. Therefore, by focusing the protection ground lines PE1 to PE5 of the power input section 3 on the frame ground terminal block 10, the power input section 3 can be effectively grounded through the ground line via the frame ground terminal block 10.
In the present embodiment, the power input unit 3 includes a circuit breaker for wiring (a first circuit breaker 51 for wiring, a second circuit breaker 55 for wiring) and a surge protector (a first surge protector 52, a second surge protector 56) disposed on a current supply path connecting the power input terminal block 4 and the noise filters (the first noise filter 53, the third noise filter 57). The protection grounds PE1, PE3, PE4 of the power supply input terminal block 4 and the protection grounds PE2, PE3, PE4 of the noise filters (the first noise filter 53, the second noise filter 54, and the third noise filter 57) are connected to the frame ground terminal block 10. Meanwhile, the protection ground line PE6 of the first surge protector 52 and the protection ground line PE7 of the second surge protector 56 are connected to the power input terminal block 4, and are connected to the frame ground terminal block 10 via the power input terminal block 4 and the protection ground line PE 1.
As described above, in the present embodiment, most of the protection ground of the power input unit 3 is concentrated on the frame ground terminal block 10. Therefore, by connecting the ground lines GL1, GL2 of the ac power supply to the frame ground terminal block 10, most of the electronic components constituting the power supply input unit 3 are grounded via the frame ground terminal block 10, so that the noise resistance is high. Therefore, the noise filter can be simplified to obtain necessary noise resistance, and thus cost reduction of the noise filter can be achieved.
In the present embodiment, the power supply input unit 3 includes a distribution connector 58 that distributes the ac current that has passed through the third noise filter 57. The protection ground PE1 of the power input terminal block 4, the protection ground PE4 of the third noise filter 57, and the protection ground PE5 of the distribution connector 58 are connected to the frame ground terminal block 10. Accordingly, noise of the alternating current supplied from the distribution connector 58 can be reduced, and thus noise resistance can be further improved.
In the present embodiment, the power supply input unit 3 includes: a first power supply input section 5A for supplying an alternating current for generating a driving current; and a second power supply input section 5B for supplying an alternating current for generating a control current having a voltage different from the drive current. The first power input unit 5A includes a first wiring breaker 51, a first surge protector 52, a first noise filter 53, and a second noise filter 54. The second power input unit 5B includes a second wiring breaker 55, a second surge protector 56, a third noise filter 57, and a distribution connector 58. The protection ground line PE1 of the power input terminal block 4, the protection ground lines PE2, PE3 of the first and second noise filters 53, 54 provided in the first power input section 5A are connected to the frame ground terminal block 10, and the protection ground line PE4 of the third noise filter 57 and the protection ground line PE5 of the distribution connector 58 provided in the second power input section 5B are connected to the frame ground terminal block 10. As described above, the protection ground line PE6 of the first surge protector 52 and the protection ground line PE7 of the second surge protector 56 are connected to the power input terminal block 4, and are connected to the frame ground terminal block 10 through the power input terminal block 4 and the protection ground line PE 1. Therefore, the electronic components constituting the first power input unit 5A and the electronic components constituting the second power input unit 5B are grounded via the frame ground terminal block 10, respectively, and thus noise of the control current and the driving current can be reduced.
The configuration of the electronic components constituting the first power input unit 5A and the second power input unit 5B is not limited to the above-described configuration, and may be appropriately changed. For example, in the above embodiment, the first power supply input unit 5A has two noise filters and the second power supply input unit 5B has one noise filter, but the number of noise filters is not limited to the above embodiment. The first surge protector 52 and the second surge protector 56 may be omitted.
(modification)
Fig. 9 is a perspective view showing a connection method of the protection earth wires PE1 to PE7 in the case of using the frame terminal block 10A of the modification. In the frame terminal block 10A shown in fig. 9, the number of screw holes 12 is 9. Therefore, in addition to the protection grounds PE1 to PE5, the protection ground PE6 of the first surge protector 52 and the protection ground PE7 of the second surge protector 56 are directly connected to the frame terminal block 10A. Therefore, the protective ground lines of the electronic components constituting the power input section 3 are all directly connected to the frame terminal block 10A, and thus the noise resistance can be further improved. In addition, as in the above embodiment, since the ground lines GL1 and GL2 are directly connected to the frame terminal block 10A, the respective electronic components constituting the power supply input unit 3 can be effectively grounded through the ground lines.
Symbol description
1 … controller; 2 … frame; 2a …;2b … back; 2c, 2d … sides; 2e … bottom; 2f … top surface; a 3 … power input; 4 … power input terminal block; 5a … first power input; 5B … second power input; 6 … fan; 10. 10a … frame ground terminal block; 11 … fixing plate; 12 … threaded holes; 13 … inclined plate; 14 … connection plates; 15 … side panels; 16 … top plate; 20 … main frame; 21A, 21B, 21C … interface panels; 22 … back panel; 23. 24 … side panels; a 25 … top plate; 26 … bottom plate; 27 … frame; 27a … front frame; 27B … side frames; a 27C … top frame; 28 … sleeve; 29 … external output connector; 30 … external connection connector; 31 … opening portion; 32 … power input section mounting face; 40 … power supply cable; 40A, 40B … power supply lines; 51 … first wire breaker; 52 … first surge protector; 53 … first noise filter; 54 … second noise filter; 55 … a second wire breaker; 56 … second surge protector; 57 … a third noise filter; 58 … dispense connector; 60 … base plate; 61 … first plate portion; 62 … second plate portion; GL1, GL2 … ground; PE1, PE2, PE3, PE4, PE5, PE6, PE7, … protect the ground.

Claims (10)

1. A controller, characterized by comprising:
a metal frame;
a power input unit to which an alternating current is input from an external power source; and
a DC-AC conversion circuit that converts an AC current supplied from the power supply input section into a DC current, and a drive current generation section that generates a drive current to be output to the outside based on the DC current supplied from the DC-AC conversion circuit,
the power input unit includes: a power input terminal block disposed in the housing; and at least one noise filter to which an alternating current is input via the power input terminal block,
the frame body comprises: a main frame provided with the power input part; and a frame ground terminal block connected to the protection ground wire of the power input unit,
the frame ground terminal block and the main frame are made of the same metal, and are welded in a state where the substrate surfaces on which the plating film is not formed are in contact with each other.
2. The controller according to claim 1, wherein,
the main frame is provided with a power input part setting surface for setting the power input part,
the frame ground terminal block is disposed on the power input unit installation surface.
3. The controller according to claim 2, wherein,
the main frame includes: a bottom plate of the frame body; and a frame-shaped frame body frame connected with the outer edge of the bottom plate,
the power input part setting surface is arranged on the bottom plate,
the frame ground terminal block is disposed on an outer edge of the bottom plate.
4. The controller according to claim 3, wherein,
the frame ground terminal block includes: a fixing plate abutting against the bottom plate; and an inclined plate extending along an outer edge of the bottom plate, the protection ground wire being fixed to the inclined plate,
the inclined plate is inclined away from the bottom plate as approaching the power input portion from the outer edge.
5. The controller according to any one of claim 1 to 4, wherein,
the power input terminal block is disposed at a front end of the power input unit on the frame ground terminal block side.
6. The controller according to any one of claims 1 to 5, wherein,
the power supply cable introduced into the housing includes: a power supply line for supplying an alternating current from an alternating current power source; and a ground wire connected to a ground terminal of the alternating current power supply,
the power supply line is connected with the power input terminal block,
the ground wire is connected with the frame ground terminal block.
7. The controller according to any one of claims 1 to 6, wherein,
the power input unit includes a circuit breaker for wiring disposed on a current supply path connecting the power input terminal block and the noise filter,
the frame ground terminal block is connected to a protection ground line of the power input terminal block and a protection ground line of the noise filter.
8. The controller according to claim 7, wherein,
the power input unit includes a surge protector disposed on a current supply path connecting the power input terminal block and the noise filter,
the protection ground wire of the surge protector is directly connected with the frame grounding terminal block or is connected with the frame grounding terminal block through the power input terminal block.
9. The controller according to any one of claims 1 to 8, wherein,
the power input unit includes a distribution connector for distributing the alternating current passing through the noise filter,
the frame ground terminal block is connected to a protection ground of the power input terminal block, a protection ground of the noise filter, and a protection ground of the distribution connector.
10. The controller according to any one of claims 1 to 6, wherein,
the power input unit includes: a first power supply input section that supplies an alternating current for generating a driving current; and a second power supply input section that supplies an alternating current for generating a control current having a voltage different from the drive current,
the first power input unit includes a first wiring breaker and a first surge protector, and at least one of the noise filters,
the second power input unit includes a second wiring breaker, a second surge protector, at least one of the noise filters, and a distribution connector,
the frame ground terminal block is connected with a protection ground wire of the power input terminal block, a protection ground wire of each noise filter arranged at the first power input part, a protection ground wire of each noise filter arranged at the second power input part and a protection ground wire of the distribution connector,
the protection ground wire of the first surge protector and the protection ground wire of the second surge protector are directly connected with the frame ground terminal block or connected with the frame ground terminal block through the power input terminal block.
CN202310317094.4A 2022-03-29 2023-03-28 Controller for controlling a power supply Pending CN116896251A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022053319A JP2023146234A (en) 2022-03-29 2022-03-29 controller
JP2022-053319 2022-03-29

Publications (1)

Publication Number Publication Date
CN116896251A true CN116896251A (en) 2023-10-17

Family

ID=88286255

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310317094.4A Pending CN116896251A (en) 2022-03-29 2023-03-28 Controller for controlling a power supply

Country Status (2)

Country Link
JP (1) JP2023146234A (en)
CN (1) CN116896251A (en)

Also Published As

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JP2023146234A (en) 2023-10-12

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