Servo motor controller
Technical Field
The invention relates to a controller of a servo motor, and belongs to the field of motor control technology application.
Background
In the prior art, in the driving process of a servo motor (generally a 3-phase alternating current motor or 2 3-phase alternating current motors, six input ends are formed), a controller is arranged between the servo motor and the driving end, so that the output of the servo motor is rectified, and the power or the output of the servo motor is controlled to be opened or closed.
The existing simple controllers (or called PS machines) can only rectify the servo motor, the structure of the servo motor comprises two matrixes, the two matrixes are integrally cast by metal materials, the two matrixes are insulated from each other, one matrix is grounded, the other matrix is provided with a rectifier bridge control element formed by a diode, the negative end of the control element is connected with the grounded matrix, the positive electrode (conductor sheet structure) of the control element is in contact connection with an external wire through a connecting column on the corresponding matrix, in order to ensure that the positive electrode of the control element is stably connected with the external wire on the connecting column, the positive electrode of the control element is required to be sheathed on the connecting column through a screw cap, and the connecting column is required to be tightly attached to the connecting end of the external wire through a torsion (the torsion refers to the prior art standard), so that the connecting column is required to be fixedly connected with the basic connection (namely the connecting column cannot be vertically displaced or horizontally deflected), but the connecting column is inconsistent with the material of the matrix provided with the control element (the prior art is considered to take the casting process, the material and the assembly cost into consideration), the fixing mode between the connecting column and the matrix is difficult to overcome the effect of the torque (the prior art is that the connecting column is normally fixed on the connecting column through the matrix, and the connecting column is easily deflected on the external wire through the matrix, so that the connecting element is not normally connected with the external wire or is not normally caused by loosening, and the vibration condition;
the controller generates heat during operation, and if the controller does not dissipate heat in time, the working state and the using time limit of the controller are greatly reduced, in the prior art, the controller is arranged on the heat dissipation plate in a mode of arranging the heat dissipation plate, and ventilation is carried out below the heat dissipation plate in a mode of transferring heat, however, the effect of the mode is not obvious.
Disclosure of Invention
The invention aims to provide a controller of a servo motor, which completely changes the existing design structure so as to overcome the defects of the prior art.
The technical proposal of the invention
A controller of a servo motor comprises a support frame base cover and a controller chip mounting box base cover;
The support frame base cover is of a conductor structure, and the bottom of the support frame base cover is grounded;
The controller chip mounting box base cover is buckled on the cavity base cover and fixed, and the negative lead-out wire of the controller chip is communicated with the support frame base cover;
preferably, the bottom plate of the base cover of the controller chip mounting box is an aluminum sheet structure base cover with conductivity, the aluminum sheet structure base cover is communicated with the negative end of the controller chip positioned in the base cover of the controller chip mounting box, a bolt groove base cover is arranged on the support frame base cover beside the base cover of the controller chip mounting box, the bolt groove base cover and the base body form a whole and have conductivity, and the bolt base cover penetrates through the aluminum sheet structure base cover and is screwed in the bolt groove base cover, so that the negative electrode of the controller chip in the base cover of the controller chip mounting box is communicated with the support frame base cover and grounded through the aluminum sheet structure base cover, the bolt base cover and the bolt groove base cover in sequence;
The lower surface of the aluminum sheet structure base cover is provided with a drainage cooling strip base cover and a channel base cover surrounded by the drainage cooling strip base cover and the lower surface of the aluminum sheet structure base cover;
the lower surface edge of aluminum sheet structure basic cover sets up the block basic cover, and this block basic cover cooperates with cavity basic cover and realizes that controller chip mounting box basic cover connects reliable and stable.
Preferably, two phase current connector base covers are arranged in front of the controller chip mounting box base cover, two elastic conductive connecting piece base covers are symmetrically arranged on the left side and the right side of the controller chip mounting box base cover, and the elastic conductive connecting piece base covers are used for connecting adjacent controller chip mounting box base covers;
the end of the elastic conductive connecting piece base cover is of an inclined surface structure, the end face of one elastic conductive connecting piece base cover of the controller chip mounting box base cover is flat, and the end face of the end of the other elastic conductive connecting piece base cover is provided with a contact protrusion base cover.
The capacitor mounting groove base cover is of a cavity structure, a controller chip capacitor circuit is arranged in the capacitor mounting groove base cover, and an output signal circuit of the controller chip mounting box base cover is connected with the capacitor mounting groove base cover and led out of an output end.
Preferably, a base cover is arranged above the support frame base cover and the capacitor mounting groove base cover;
The base cover is integrally insulated and is internally provided with a conductor piece base cover used for communicating the controller chip or the capacitor anode of the controller chip;
the conductor piece base cover is pre-buried in the base cover, and the output end of the conductor piece base cover is exposed.
Preferably, a fixed column base cover is pre-buried at the base cover of the output end of the conductor chip base cover, the output end of the conductor chip base cover is sleeved on the fixed column base cover, and an external wire connected with the positive electrode of the controller chip or the capacitor of the controller chip is sleeved on the fixed column base cover to realize the connection and fixation of the external wire and the conductor chip base cover.
Preferably, the upper part of the fixed column base cover is in a threaded structure, and the nut base cover is matched with the fixed column base cover so that the conductive sheet base cover sleeved on the fixed column base cover and the external electric wire are in contact stability with each other.
Preferably, a supporting circular plate base cover is arranged at the lower part of the fixed column base cover, and is integrally embedded into the base cover, and the upper surface of the supporting circular plate base cover is exposed;
Preferably, the upper surface of the base cover of the supporting circular plate is higher than the upper surface of the base cover of the surrounding vicinity thereof.
Preferably, a fixed ring base cover is arranged at the bottom end of the fixed column base cover, the fixed ring base cover is wrapped by the base cover, so that the outer part of the fixed ring base cover is insulated, a bolt hole base cover is arranged on the support frame base cover corresponding to the position of the fixed ring base cover, the bolt one base cover penetrates through the fixed ring base cover to be connected with the bolt hole base cover in a matched manner, the middle part of the fixed ring base cover is fixed with the base cover, and the bottom of the fixed ring base cover is fixed with the support frame base cover through the bolt one base cover and is insulated from the support frame base cover;
A sleeve base cover is arranged in a hollow position in the middle of the fixed ring base cover, the sleeve base cover is embedded on the base cover around the fixed ring base cover, and a bolt base cover penetrates through the sleeve base cover and then is matched with the bolt hole base cover;
The outer surface of the sleeve base cover is provided with a sawtooth strip base cover parallel to the axis of the sleeve base cover, the outer surface of the sleeve base cover is provided with a shallow groove ring base cover, and the sawtooth strip base cover and the shallow groove ring base cover are mutually staggered.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the advantages of simple processing technology, convenient installation, strong universality and higher stability.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a cross-sectional view of FIG. 1 at the fixing post of FIG. 1;
FIG. 4 is a schematic structural view of a support frame;
Fig. 5 is a schematic structural view of a controller chip mounting box;
FIG. 6 is a schematic structural view of an aluminum sheet;
FIG. 7 is a schematic structural view of a sleeve;
FIG. 8 is a schematic view of the connection of the present invention to an external wire;
fig. 9 is a schematic cross-sectional view of the mating of the retaining ring with the first bolt.
The marks in the drawing are 1-supporting frame, 2-cavity, 3-controller chip mounting box, 4-aluminum sheet structure, 5-bolt groove, 6-bolt, 7-drainage cooling strip, 8-channel, 9-clamping table, 10-phase current connector, 11-elastic conductive connecting sheet, 12-contact bulge, 13-capacitor mounting groove, 14-base cover, 15-conductor sheet, 16-fixed column, 17-nut, 18-supporting circular plate, 19-fixed ring, 20-bolt hole, 21-bolt one, 22-sleeve, 23-saw rack, 24-shallow slot ring, 25-gap and 26-external wire.
Detailed Description
The invention is described in further detail below with reference to the attached drawings, but is not intended to be limiting in any way.
As shown in figures 1-8, the controller of the servo motor comprises a support frame 1 and a controller chip mounting box 3, wherein the support frame 1 is of a conductor structure, and the bottom of the support frame is grounded;
The bottom plate of the controller chip mounting box 3 is provided with a conductive aluminum sheet structure 4, the aluminum sheet structure 4 is communicated with the negative electrode end of the controller chip positioned in the controller chip mounting box 3, a bolt groove 5 is formed in the support frame 1 beside the controller chip mounting box 3, the bolt groove 5 and a matrix form a whole body to have a conductive effect, and a bolt 6 penetrates through the aluminum sheet structure 4 and is screwed in the bolt groove 5, so that the negative electrode of the controller chip in the controller chip mounting box 3 is communicated with the support frame 1 through the aluminum sheet structure 4, the bolt 6 and the bolt groove 5 in sequence and is grounded;
The lower surface of the aluminum sheet structure 4 is provided with a drainage cooling strip 7 and a channel 8 surrounded by the drainage cooling strip 7 and the lower surface of the aluminum sheet structure 4;
The lower surface of aluminum sheet structure 4 sets up clamping table 9 along the limit, this clamping table 9 cooperates with cavity 2 and realizes that controller chip mounting box 3 connects reliable and stable, through set up cavity 2 at the support frame, and controller chip mounting box 3 direct mount just is fixed in cavity department, and be provided with drainage cooling strip 7 on the lower surface of aluminum sheet structure 4, under the fan effect, cold wind direct action controller chip mounting box 3 bottom's aluminum sheet structure 4, can improve the radiating effect greatly, its aluminum sheet structure 4 itself is as the negative pole output of controller chip in the controller chip mounting box 3 again for the radiating effect is very obvious, and prior art generally all adopts to place the controller chip on the heating panel, dispel the heat through the heating panel, wherein one step more passes the heat, and the heating panel is guaranteed controller chip and contact stability again, otherwise the effect is unobvious, this scheme has completely avoided prior art's design scheme, and the cost of manufacture is low, the reliability is high.
Two phase current connectors 10 are arranged in front of the controller chip mounting box 3, the phase current connectors 10 are used for connecting corresponding lower phase circuits of a motor, two elastic conductive connecting sheets 11 are symmetrically arranged on the left side and the right side of the controller chip mounting box 3, the elastic conductive connecting sheets 11 are used for connecting adjacent controller chip mounting boxes 3, and the elastic conductive connecting sheets 11 are used for transmitting control signals between mutual controller chips;
The end part of the elastic conductive connecting sheet 11 is of an inclined surface structure, the end surface of the end part of one elastic conductive connecting sheet 11 of the controller chip mounting box 3 is flat, the end surface of the end part of the other elastic conductive connecting sheet 11 is provided with a contact protrusion 12, and the adjacent controller chip mounting box 3 is connected stably and reliably due to the inclined surface structure and the contact protrusion 12.
A capacitor mounting groove 13 is formed in one side of the support frame 1, the capacitor mounting groove 13 is of a cavity structure, a controller chip capacitor circuit is arranged in the capacitor mounting groove 13, and an output signal circuit of the controller chip mounting box 3 is connected with the capacitor mounting groove 13 and led out of an output end.
A base cover 14 is arranged above the support frame 1 and the capacitor mounting groove 13;
The base cover 14 is connected with the support frame 1 or the capacitor mounting groove 13 through bolts or hinges and is insulated from each other, the base cover 14 is integrally insulated, and a conductor sheet 15 for communicating a controller chip or a capacitor anode of the controller chip is arranged in the base cover 14, wherein the support frame 1 is generally cast by aluminum through integral casting of metal with conductivity in the prior art, the base cover 14 is integrally cast by an insulating plastic material, the conductor sheet 15 is integrally cast by a mold and is placed on the base cover 14, and the input end and the output end of the conductor sheet are exposed respectively.
In the prior art, two matrixes are cast integrally by aluminum casting, so that the matrix positioned on the upper layer is not cast by plastic, mainly, the connecting column connecting columns in the prior art are all made of metal with extremely high conductivity, such as aluminum or copper and the like, and are required to be fixedly connected with the connecting column, if the matrix is made of plastic and is connected with the connecting column, under the action of torque, the connecting column and the matrix are difficult to bear the torque, so that the upper matrix is generally required to be made of metal with higher hardness, then the connecting column is fixed in the connecting hole of the upper matrix by adopting a rivet mode, the connecting mode is still unreliable, and the two metal parts are fixed only by deformation of a mechanical pretension rivet, so that looseness is easy to be caused in the long-term use process in the later period, and the connection at the position is unreliable.
The conductor piece 15 is embedded in the base cover 14 and its output end is exposed.
The base cover 14 at the output end of the conductor sheet 15 is embedded with a fixing column 16, the output end of the conductor sheet 15 is sleeved on the fixing column 16, and an external wire connected with the controller chip or the positive electrode of the capacitor of the controller chip is sleeved on the fixing column 16 to realize connection and fixation of the external wire and the conductor sheet 15.
The upper part of the fixing post 16 is in a threaded structure, and the nut 17 is matched with the fixing post 16 so that the conductor piece 15 sleeved on the fixing post 16 and an external electric wire are contacted with each other stably.
A support circular plate 18 is arranged at the lower part of the fixed column 16, the support circular plate 18 is integrally embedded in the base cover 14, and the upper surface is exposed;
The upper surface of the support circular plate 18 is higher than the upper surface of the base cover 14 around the vicinity thereof.
A fixed ring 19 is arranged at the bottom end of the fixed column 16, the fixed ring 19 is wrapped by the base cover 14, so that the outside of the fixed ring 19 is insulated, a bolt hole 20 is arranged on the support frame 1 corresponding to the position of the fixed ring 19, a first bolt 21 passes through the fixed ring 19 to be connected with the bolt hole 20 in a matched manner, the middle part of the fixed ring 19 is fixed with the base cover 14, and the bottom of the fixed ring is fixed with the support frame 1 through the first bolt 21 and is insulated from each other;
a sleeve 22 is arranged in the hollow position in the middle of the fixed ring 19, the sleeve 22 is embedded on the base cover 14 around the fixed ring 19, and a first bolt 21 passes through the sleeve 22 and then is matched with the bolt hole 20;
A serration bar 23 parallel to the axis of the sleeve 22 is provided on the outer surface of the sleeve 22, and a shallow groove ring 24 is provided on the outer surface of the sleeve 22, the serration bar 23 and the shallow groove ring 24 being staggered with each other.
In this embodiment, the thickness of the fixing post 16, the supporting circular plate 18 and the fixing ring 19 is not limited, and the fixing ring 19 can be integrally cast according to the specific design of torsion force, after the fixing post 16 is in this structure, when the base cover 14 is cast by using an insulating material, the conductor piece 15 is also integrally cast at this time and the conductor piece 15 is sleeved on the fixing post 16, so that the threaded structure portion of the fixing post 16, the upper surface of the supporting circular plate and the hollow portion of the sleeve 22 are exposed, and the rest is fully covered by the base cover 14, including the gap 25 between the fixing ring 19 and the sleeve 22, and is fully filled with the insulating material forming the base cover 14, the bolt hole 20 is arranged on the support frame 1 corresponding to the position of the fixing ring 19, and the first bolt 21 is screwed into the bolt hole 20 to form the whole with the support frame 1 after passing through the sleeve 22.
When the external wire 26 is put on the fixing post 16 to be in contact with the conductor piece 15, the fixing ring 19 on the fixing post is also tightly attached to the conductor piece 15 and the external wire 26 by screwing the nut 17 to the fixing post 16 and then applying torsion force to the fixing post to make contact with the conductor piece 15 and the external wire 26 with reference to the prior art standard.
When torsion is generated, the fixed column 16 is also subjected to torsion, however, because the fixed column 16 is integrally covered by the base cover 14 to realize position fixing, plastic is a brittle material and has low strength, and cannot resist the situation that the fixed column is easily broken due to the fact that excessive torsion is applied to the fixed column, the torsion applied to the fixed column 16 is mainly transmitted to the sleeve 22 and then to the bolt one 21 through the fixed column 16, and finally to the support frame 1, and because the fixed column 16 comprises the fixed ring 19, the support circular plate 18, the sleeve 22, the bolt one 21 and the support frame 1, the fixed column 16 is made of metal with high hardness, so that the large torsion can be resisted, and the base cover 14 is only subjected to partial torsion, and only has the effect of limiting the position of the fixed column 16, so that the torsion resistance of the fixed column is greatly increased, and the controller can be ensured to be reliably contacted with an external line when the controller is used.
Compared with the prior art, the base cover 14 is made of insulating plastic, so that the cost is greatly saved, the space for installing the chip on the base body is increased, the controller can have more control functions, and meanwhile, the output end connection is reliable and stable.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.