PLC track power supply

Abstract

The utility model provides a PLC track power supply which comprises a power supply box body, a power supply module is arranged in the power supply box body, and the power supply module is used for converting alternating current into direct current. The connecting box body is connected to the power supply box body, the connecting box body can be mechanically connected to a track, the connecting box body is provided with a conductive part, and the conductive part is used for being electrically connected to the track; wherein the connecting box body is internally provided with a coupling module, the power supply module, the conductive part and the power line are electrically connected to the coupling module, the coupling module is used for acquiring a PLC signal on the power line and coupling the acquired PLC signal to the direct current, and the direct current is output to a track through the conductive part. The PLC track power supply provided by the utility model reduces the development cost.

Description

Technical Field

[0001] The utility model relates to the technical field of track lights, in particular to a PLC track power supply. Background Art

[0002] Traditional power line carrier communication technology (referred to as PLC technology for short) is generally applied to remote meter reading systems, street lamp remote monitoring systems, and industrial equipment data acquisition. This technology loads signals on power lines and transmits signals through power lines. Nowadays, major manufacturers have found that PLC technology has broad prospects in the smart home market, and it can improve problems such as signal delay and packet loss caused by wireless communication.

[0003] Magnetic track lights are an important element in today's indoor lighting design. Magnetic track lights include downlights, floodlights, grille lights, folding grille lights, pendant lights, etc. The track is equivalent to a large "power strip". The track power supply conducts through the track to the track lights, thereby providing electrical energy for the track lights. The track lights can be flexibly adjusted in position on the track. Multiple track lights can share one track, and multiple tracks can also share one track power supply, which makes the installation and matching of track lights flexible and changeable, meeting diverse lighting needs.

[0004] Most traditional magnetic track lights adopt wireless communication technology, and the function of the track is only to transmit electrical energy. With the development of power line carrier communication technology, the track can also be an excellent carrier for PLC signal transmission. Through the track, PLC signals can be transmitted to each track light, and this requires the track power supply to transfer the PLC signals carried on 220V alternating current to the track. If a new PLC track power supply is designed, it requires a high development cost. Therefore, how to transform a traditional track power supply into a PLC track power supply based on its structure has become an urgent problem to be solved. Summary of the Utility Model

[0005] An object of the utility model is to provide a PLC track power supply, wherein a coupling module is used to obtain PLC signals on the power line and couple the obtained PLC signals to direct current. The direct current is conducted to the magnetic track lights through the conductive bars in the track, and the PLC signals carried on the direct current are also transmitted to the magnetic track lights through the conductive bars. The magnetic track lights control the luminous brightness and color temperature based on the PLC signals.

[0006] Another object of the utility model is to provide a PLC track power supply. Based on the traditional track power supply, the coupling module is placed inside the connection box body, and the power supply module, conductive parts, and power lines are electrically connected to the coupling module, realizing the transformation of the traditional track power supply into a PLC track power supply, retaining the original mechanical structure of the track power supply, not only reducing the development cost of the PLC track power supply, but also enabling it to share production materials with the traditional track power supply.

[0007] Another object of the present utility model is to provide a PLC track power supply, wherein the function of the power supply module is the same as that of the power supply module of the traditional track power supply. Therefore, during production and assembly, the power supply module can be universal with the traditional track power supply, reducing the production and manufacturing costs.

[0008] Another object of the present utility model is to provide a PLC track power supply, wherein the advantage of connecting through wires is that the wires are relatively soft and the length can be designed arbitrarily, with high connection flexibility, so as to facilitate the transformation of the traditional track power supply into a PLC track power supply on the basis of retaining the original structure.

[0009] Another object of the present utility model is to provide a PLC track power supply, wherein the power supply module is provided with a second ground wire, the second ground wire is connected to another conductive screw, the power supply box body is made of a metal material, and the second ground wire is conducted to the first ground wire through the power supply box body, thereby realizing the grounding of the second ground wire.

[0010] In order to achieve at least one of the above objects, the present utility model provides a PLC track power supply, including a power supply box body and a connection box body. A power supply module is arranged inside the power supply box body, and the power supply module is used to convert alternating current into direct current; the connection box body is connected to the power supply box body, the connection box body can be mechanically connected to a track, the connection box body is provided with a conductive member, and the conductive member is used for electrically connecting to the track; wherein, a coupling module is arranged inside the connection box body, the power supply module, the conductive member and a power cord are respectively electrically connected to the coupling module, the coupling module is used to obtain the PLC signal on the power cord, and couple the obtained PLC signal to the direct current, and the direct current is output to the track through the conductive member.

[0011] Further, the power supply module includes an input end and an output end, and the coupling module includes a first connection part, a second connection part, a third connection part and a fourth connection part; the first connection part is electrically connected to the power cord, and the alternating current carrying the PLC signal is transmitted to the coupling module through the first connection part; the second connection part is electrically connected to the input end of the power supply module, and the alternating current is transmitted to the power supply module through the second connection part after passing through the coupling module; the third connection part is electrically connected to the output end of the power supply module, and the direct current output by the power supply module is transmitted to the coupling module through the third connection part; the fourth connection part is electrically connected to the conductive member, and the direct current coupled with the PLC signal is transmitted to the conductive member through the fourth connection part.

[0012] Further, the first connection part, the second connection part, the third connection part and the fourth connection part are all welding holes; the power line is welded to the first connection part, the second connection part is connected to the input end of the power supply module through a second wire, the third connection part is connected to the output end of the power supply module through a third wire, and the fourth connection part is connected to the conductive part through a fourth wire.

[0013] Further, the conductive parts are arranged on both sides of the connection box body, the conductive parts protrude from the side wall of the connection box body, the inner sides of the conductive parts are elastically supported, and the fourth wire is welded to the conductive parts; buckles are arranged on both sides of the connection box body, and the buckles are used for clamping on the track.

[0014] In some embodiments, the coupling module includes an access unit arranged on a coupling circuit board; wherein, the input end of the access unit serves as the first connection part, accesses the power line through the power supply box body, and introduces multiple signals loaded on the power line. An impedance transformer is arranged in the access unit to form a high impedance of the access unit for signals in a specified frequency band, and further the access unit is configured to be able to pass the PLC signals in the specified frequency band with high impedance and be able to pass the power supply signals in non-specified frequency bands with low impedance.

[0015] Further, the access unit respectively accesses a first inductor and a second inductor on the zero line and the live line of the accessed power line to form the impedance transformer. In a state where the first inductor and the second inductor access the power supply signal through the power line, based on the frequency selection characteristics of the first inductor and the second inductor, an impedance sudden increase of the PLC signal in the specified frequency band passing through the access unit is formed.

[0016] Further, the access unit also forms the second connection part at the output end of the impedance transformer and is electrically connected to the power supply module through the second connection part. After the power supply module accesses the power supply, the 220V alternating current is converted into 48V or 24V direct current through a voltage conversion circuit and then output through a power supply pin.

[0017] Further, the coupling module further includes a bidirectional coupling unit arranged on the coupling circuit board. Among them, the bidirectional coupling unit includes a transformer and a first capacitor. The bidirectional coupling unit accesses the PLC signal through the transformer and the first capacitor before the impedance transformer in the access unit. The transformer has the first capacitor connected in series between its primary side and one end of the access end of the impedance transformer of the access unit facing the power line, and its secondary side is electrically connected to an output unit;

[0018] The output unit includes a third inductor and a fourth inductor. Two output terminals of the secondary side of the transformer are respectively connected in series with the third inductor and the fourth inductor, and signal pins for external output are formed between the secondary output terminals and the third inductor and the fourth inductor.

[0019] The ends of the third inductor and the fourth inductor far from the transformer are respectively electrically connected to the power pins of the power supply module, so that: the power supply output by the power supply module can be loaded into the signal pins through the third inductor and the fourth inductor to form the fourth connection part, and together with the PLC signal in the signal pins, it is transmitted to the lamps on the track.

[0020] A third capacitor is connected in series between the secondary side of the transformer and the signal pins. The third capacitor is configured so that: in the state where the access unit accesses the power line, the third capacitor is electrically connected to the secondary side of the transformer to form a bidirectional coupling unit having a second-direction selectivity for a specified frequency band, so that the bidirectional coupling unit can isolatedly access the PLC signal from the secondary side of the transformer at the primary side of the transformer.

[0021] In some embodiments, the bottom of the connection box body is attached to the top of the power supply box body. A plurality of first wiring holes are provided through the bottom of the connection box body, a plurality of second wiring holes are provided through the top of the power supply box body, and a third wiring hole is provided through the side end of the power supply box body; the power line passes through the third wiring hole, the second wiring hole and the first wiring hole and is connected to the coupling module.

[0022] In some embodiments, the connection box body is connected to the power supply box body by a plurality of conductive screws. The power line includes a first ground wire, and the first ground wire is connected to one of the conductive screws; the power supply module is provided with a second ground wire, and the second ground wire is connected to another conductive screw. The second ground wire is conducted to the first ground wire through the power supply box body.

[0023] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. The above-mentioned various contents of the present invention can be combined arbitrarily, and these and other purposes of the present invention will be fully reflected by the following detailed description and the drawings.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present invention. Description of the Drawings

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the connection between the PLC track power supply and the track according to an embodiment of the present invention;

[0027] Figure 2 It is a side view of the PLC track power supply installed on the track according to an embodiment of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the connection box body and the power supply box body according to an embodiment of the present invention;

[0029] Figure 4 It is an exploded view of the connection box body according to an embodiment of the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the coupling module according to an embodiment of the present invention;

[0031] Figure 6 It is a top view of the connection box body with the upper cover removed according to an embodiment of the present invention;

[0032] Figure 7 It is a partial enlarged view of the three-dimensional cross-sectional view of the connection box body according to an embodiment of the present invention;

[0033] Figure 8 It is an assembly schematic diagram of the connection box body, the conductive part and the spring support part according to an embodiment of the present invention;

[0034] Figure 9 It is an exploded view of the power supply box body according to an embodiment of the present invention;

[0035] Figure 10 It is a three-dimensional cross-sectional view of the exploded view of the PLC track power supply according to an embodiment of the present invention;

[0036] Figure 11 It is a connection schematic diagram between the power cord, the coupling module, the power supply circuit board and the conductive part according to an embodiment of the present invention;

[0037] Figure 12 It is a schematic diagram of the overall circuit structure of the PLC track power supply according to an embodiment of the present invention;

[0038] Figure 13 It is a circuit diagram of the coupling module according to an embodiment of the present invention.

[0039] Reference numerals:

[0040] 100, PLC track power supply; 200, track; 210, conductive bar; 220, silicon steel sheet; 1, connection box body; 11, conductive member; 111, limiting portion; 112, protruding portion; 12, spring support member; 121, U-shaped sleeve; 122, spring; 13, bottom box; 131, limiting groove; 132, telescopic buckle; 133, button; 134, return spring; 135, elastic arm buckle; 14, upper cover; 141, connecting screw; 142, permanent magnet; 15, first wiring hole; 16, conductive screw; 17, grounding terminal; 2, power supply box body; 21, second wiring hole; 22, third wiring hole; 23, end cover; 24, fourth connection hole; 25, long cylindrical body; 3, power module; 31, power circuit board; 32, second ground wire; 4, coupling module; 41, coupling circuit board; 411, first inductor; 412, second inductor; 413, third inductor; 414, fourth inductor; 415, first capacitor; 416, second capacitor; 417, bidirectional coupling unit; 418, transformer; 42, first connection portion; 421, first welding hole; 422, second welding hole; 43, second connection portion; 431, third welding hole; 432, fourth welding hole; 44, third connection portion; 45, fourth connection portion; 46, second wire; 47, third wire; 48, fourth wire; 5, power cord; 51, live wire; 52, neutral wire; 53, first ground wire. Detailed implementation manners

[0041] In the description of the present utility model, the orientation or positional relationship indicated by the terms "inner", "outer", "horizontal", "vertical", "upper", "lower", "top", "bottom", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model rather than requiring the present utility model to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0042] In the description of the specification of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0043] In the description of the specification of the present utility model, unless otherwise clearly defined and limited, terms such as "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a connection capable of mutual communication; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal connection of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0044] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. The technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0045] To reduce the development cost of the PLC track power supply, the present utility model provides a PLC track power supply 100. Please refer to Figures 1-13 , and the PLC track power supply 100 provided by the present utility model will be specifically explained. As Figures 1-3 shown, the PLC track power supply 100 includes a power supply box body 2 and a connection box body 1. A power supply module 3 is arranged inside the power supply box body 2, and the power supply module 3 is used to convert alternating current into direct current; the connection box body 1 is connected to the power supply box body 2, the connection box body 1 can be mechanically connected to the track 200, and the connection box body 1 is provided with a conductive member 11, and the conductive member 11 is used for electrical connection to the track 200. Among them, the mechanical connection can be snap connection, magnetic attraction connection, screw connection, etc. The structures of the tracks 200 on the market are diverse, and the structure of the connection box body 1 can be adaptively designed according to the structure of the track 200. In an exemplary embodiment, as Figure 2As shown, the cross-section of the track 200 is configured in a shape similar to a "ji" character structure with an open bottom. Card slots are provided on the inner walls on both sides of the track 200, and buckles are provided on both sides of the connection box body 1. The connection box body 1 is inserted into the track 200 from bottom to top, and the buckles are snapped into the card slots to mechanically connect the connection box body 1 and the track 200. The magnetic attraction track light is generally powered by 48V or 24V direct current. The power supply module 3 includes a power supply circuit board 31 and a voltage conversion circuit (not shown in the figure) provided on the power supply circuit board 31. The power supply module 3 can convert 220V alternating current into 48V or 24V direct current to supply power to the magnetic attraction track light. The conductive member 11 can be a metal elastic sheet, a conductive spring needle, etc. In this embodiment, the conductive member 11 is a metal elastic sheet. The conductive member 11 is provided on both sides of the connection box body 1 and protrudes from the connection box body 1. A conductive strip 210 is embedded inside the side wall of the track 200. When the connection box body 1 is installed on the track 200, the conductive member 11 abuts against the conductive strip 210 inside the track 200 to achieve electrical connection between the two.

[0046] In the embodiment of the present utility model, a coupling module 4 is provided inside the connection box body 1. The power supply module 3, the conductive member 11, and the power cord 5 are respectively electrically connected to the coupling module 4. The coupling module 4 is used to obtain the PLC signal on the power cord 5 and couple the obtained PLC signal to the direct current. The direct current is output to the track 200 through the conductive member 11. The power cord 5 is connected to the 220V power line. The conductive member 11 conducts the direct current to the conductive strip 210 inside the track 200. The magnetic attraction track light is electrically connected to the conductive strip 210. The direct current is conducted to the magnetic attraction track light through the conductive strip 210. The PLC signal carried on the direct current is also transmitted to the magnetic attraction track light through the conductive strip 210. The magnetic attraction track light controls the light emission brightness and color temperature based on the PLC signal. On the basis of the traditional track power supply, the PLC track power supply 100 provided by the present utility model places the coupling module 4 inside the connection box body 1 and electrically connects the power supply module 3, the conductive member 11, and the power cord 5 to the coupling module 4, realizing the transformation of the traditional track power supply into the PLC track power supply 100, retaining the original mechanical structure of the track power supply, not only reducing the development cost of the PLC track power supply 100, but also enabling it to share production materials with the traditional track power supply.

[0047] Further, as Figure 11As shown, the power module 3 includes an input end and an output end, and the coupling module 4 includes a first connection part 42, a second connection part 43, a third connection part 44 and a fourth connection part 45; the first connection part 42 is electrically connected to the power line 5, and the alternating current carrying the PLC signal is transmitted to the coupling module 4 via the first connection part 42; the second connection part 43 is electrically connected to the input end of the power module 3, and the alternating current is transmitted to the power module 3 from the second connection part 43 through the coupling module 4; the third connection part 44 is electrically connected to the output end of the power module 3, and the direct current output by the power module 3 is transmitted to the coupling module 4 via the third connection part 44; the fourth connection part 45 is electrically connected to the conductive member 11, and the direct current coupled with the PLC signal is transmitted to the conductive member 11 via the fourth connection part 45. Among them, the first connection part 42, the second connection part 43, the third connection part 44 and the fourth connection part 45 can be wiring terminals, welding holes or other structures that can be used for connection and conduction. In a specific embodiment, the first connection part 42, the second connection part 43, the third connection part 44 and the fourth connection part 45 each include two welding holes. The function of the coupling module 4 is to obtain the PLC signal and couple the PLC signal to the direct current. The input end of the power module 3 receives the alternating current transmitted by the coupling module 4. The function of the power module 3 is to convert the 220V alternating current into 48V or 24V direct current, and the direct current is output by the output end of the power module 3. It is worth noting that since the function of the power module 3 of this embodiment is the same as that of the power module of the traditional track power supply, the power module 3 can be used in common with the traditional track power supply during production and assembly, thereby reducing the production and manufacturing cost.

[0048] Furthermore, if Figure 11 and Figure 5 As shown, the coupling module 4 includes a coupling circuit board 41, and the first connection part 42, the second connection part 43, the third connection part 44 and the fourth connection part 45 are all arranged on the coupling circuit board 41. Furthermore, the first connection part 42, the second connection part 43, the third connection part 44 and the fourth connection part 45 are all welding holes; the power line 5 is welded to the first connection part 42, the second connection part 43 is connected to the input end of the power module 3 through the second wire 46, the third connection part 44 is connected to the output end of the power module 3 through the third wire 47, and the fourth connection part 45 is connected to the conductive member 11 through the fourth wire 48. Among them, the second wire 46, the third wire 47 and the fourth wire 48 are all two, and the power line 5 includes a live wire 51, a neutral wire 52 and a first ground wire 53. Figure 11Among them, the live wire 51, the neutral wire 52, the second wire 46, the third wire 47, and the fourth wire 48 are respectively represented by dotted lines. It should be noted that the advantage of using wire connection is that the wire is relatively flexible and the length can be designed arbitrarily, with high connection flexibility, so as to transform the traditional track power supply into a PLC track power supply 100 on the basis of retaining the original structure.

[0049] Furthermore, as Figures 3-8 shown, the conductive members 11 are arranged on both sides of the connection box body 1. The conductive members 11 protrude from the side wall of the connection box body 1. The inner sides of the conductive members 11 are elastically supported, and the fourth wire 48 is welded to the conductive members 11; there are buckles on both sides of the connection box body 1, and the buckles are used for clamping to the track 200.

[0050] Furthermore, as Figure 8 and Figure 7 shown, the connection box body 1 is provided with 4 conductive members 11. Among them, the 4 conductive members 11 are distributed in pairs at both ends of the connection box body 1. A spring support member 12 is arranged between the two conductive members 11 at the same end. The spring support member 12 elastically supports the conductive members 11 to make the contact between the conductive members 11 and the internal conductive bars 210 of the track 200 more stable. The spring support member 12 includes a U-shaped sleeve 121 and a spring 122 clamped in the middle of the U-shaped sleeve 121. Limiting columns are respectively arranged on the side walls on both sides of the U-shaped sleeve 121 towards the inside. The two ends of the spring 122 are respectively sleeved on the two limiting columns. The side wall of the U-shaped sleeve 121 abuts against the conductive member 11. The conductive member 11 includes an integrally formed limiting portion 111 and a protruding portion 112. A limiting groove 131 is arranged inside the connection box body 1. The limiting portion 111 is inserted into the limiting groove 131. A through hole is opened on the side wall of the connection box body 1 corresponding to the protruding portion 112. The protruding portion 112 passes through the through hole and protrudes from the outer surface of the connection box body 1.

[0051] It should be noted that, as Figure 2 shown, there are two conductive bars 210 respectively arranged on the left and right sides of the track 200. There is a height difference between the two conductive bars 210 on the same side. As Figure 8 shown, the protruding portions 112 of the 4 conductive members 11 respectively correspond to the positions of the four conductive bars 210, that is, the heights of the two protruding portions 112 at the first end are higher than the heights of the two protruding portions 112 at the second end. The two U-shaped sleeves 121 are placed upside down to adapt to the height change of the protruding portions 112. When the position of the protruding portion 112 is higher, the U-shaped sleeve 121 is placed upright. When the position of the protruding portion 112 is lower, the U-shaped sleeve 121 is inverted. The purpose is to reduce the height occupied by the U-shaped sleeve 121, so as to avoid the connection box body 1 being too thick.

[0052] In some embodiments, asFigure 4 and Figure 5 As shown in Figure 5 , the electronic components disposed on the coupling circuit board 41 are located on the lower surface of the coupling circuit board 41, so that the height of the coupling circuit board 41 is higher, facilitating the soldering of wires to the soldering holes.

[0053] In some embodiments, as Figure 5 and Figure 11 shown, an inductor (the first inductor 411 and the second inductor 412) is connected in series between the first connection portion 42 and the second connection portion 43. The first connection portion 42 includes a first soldering hole 421 and a second soldering hole 422. Among them, the first soldering hole 421 is connected to the live wire 51, and the second soldering hole 422 is connected to the neutral wire 52. The second connection portion 43 includes a third soldering hole 431 and a fourth soldering hole 432. Among them, the third soldering hole 431 and the fourth soldering hole 432 are respectively connected to the input end of the power supply module 3 through a second wire 46. A first inductor 411 is connected in series between the first soldering hole 421 and the third soldering hole 431, and a second inductor 412 is connected in series between the second soldering hole 422 and the fourth soldering hole 432.

[0054] The structure of the coupling module 4 is as Figure 5 shown.

[0055] In a possible implementation solution of a coupling module, the circuit diagram of the coupling module 4 is as Figure 12 and Figure 13 shown. The coupling module 4 includes an access unit disposed on the coupling circuit board 41. Among them, the input end of the access unit serves as the first connection portion 42, accesses the power supply line 5 (L, N) through the power supply box body 2, and introduces multiple signals loaded in the power supply line 5. An impedance transformer (the first inductor 411 and the second inductor 412) is provided in the access unit to form a high impedance of the access unit for signals in a specified frequency band to pass through. Furthermore, the access unit is configured to be able to pass the PLC signals in the specified frequency band with high impedance and be able to pass the power supply signals in the non-specified frequency band with low impedance to supply power to the lamps connected to the track. Among them, the power supply signal can be, for example, a 220V, 50Hz industrial frequency alternating current signal, and the PLC signal is the power line carrier signal.

[0056] Further, the access unit connects a first inductor 411 and a second inductor 412 to the neutral line and the live line of the power supply line 5 respectively for access, so as to form the impedance transformer. In the state where the first inductor 411 and the second inductor 412 access the power supply signal through the power supply line 5, based on the frequency selection characteristics of the first inductor 411 and the second inductor 412, a PLC signal in a specified frequency band is formed through the sudden increase in impedance of the access unit, thereby achieving a high impedance effect. The specified frequency band is set to 2.4 MHz to 5.6 MHz. The inductance values of the first inductor 411 and the second inductor 412 are set to 33 μH to 1 mH, specifically, for example, a magnetic ring inductor of 330 μH / 3A.

[0057] In addition, the access unit further forms the second connection part 43 at the output end (DY_N, DY_L) of the impedance transformer, and electrically connects the power supply module 3 through the second connection part 43. After the power supply module 3 accesses the power supply (such as a 220V AC power supply), the 220V AC power is converted into 48V or 24V DC power through a voltage conversion circuit (such as an isolated buck power supply) and then output to the third connection part 44 of the coupling module 4 through the power supply pins.

[0058] The coupling module 4 includes a bidirectional coupling unit 417 provided on the coupling circuit board 41. Among them, the bidirectional coupling unit 417 includes a transformer 418 (T2) and a first capacitor 415. The bidirectional coupling unit accesses the PLC signal before the impedance transformer in the access unit (i.e., on the side close to the access end of the power supply line 5) through the transformer 418 (T2) and the first capacitor 415. The first capacitor 415 is connected in series between the primary side of the transformer 418 (T2) and one end of the impedance transformer of the access unit facing the access end of the power supply line 5, and the secondary side of the transformer is electrically connected to an output unit.

[0059] Specifically, the output unit includes a third inductor 413 and a fourth inductor 414. The two output terminals of the secondary side of the transformer 418 (T2) are respectively connected in series with the third inductor 413 and the fourth inductor 414, and signal pins for externally outputting signals are formed between the secondary output terminals and the third inductor 413 and the fourth inductor 414. In a state where the access unit accesses the power line 5, the first capacitor 415 is electrically connected to the primary side of the transformer 418 (T2) to form a bidirectional coupling unit having a first-direction selectivity for a specified frequency band, so that the bidirectional coupling unit can isolate and access the PLC signal from the primary side of the transformer 418 (T2) on the secondary side of the transformer 418 (T2). At this time, the PLC signal can be understood as the PLC signal transmitted from the power line 5 to the access unit. After being coupled by the bidirectional coupling unit 417, it is output to the track through the externally output signal pins, and then transmitted to the lamps with PLC modules connected to the track.

[0060] One ends of the third inductor 413 and the fourth inductor 414 far from the transformer 418 (T2) are respectively electrically connected to the power pins (48V +, 48V -) of the power supply module 3, so that: the power supply output by the power supply module 3 can be loaded into the signal pins through the third inductor 413 and the fourth inductor 414 to form the fourth connection part 45, and be transmitted to the lamps on the track together with the PLC signal in the signal pins.

[0061] A third capacitor 418 is connected in series between the secondary side of the transformer 418 (T2) and the signal pins. The third capacitor 418 is configured so that: in a state where the access unit accesses the power line 5, the third capacitor 418 is electrically connected to the secondary side of the transformer 418 (T2) to form a bidirectional coupling unit having a second-direction selectivity for a specified frequency band, so that the bidirectional coupling unit 417 can isolate and access the PLC signal from the secondary side of the transformer 418 (T2) on the primary side of the transformer 418 (T2). At this time, the PLC signal can be understood as the PLC signal transmitted from the track to the signal pins (such as the PLC signal emitted by the lamps in the track). After being coupled by the bidirectional coupling unit, it is output to the power line 5 again.

[0062] Such as Figure 13As shown, a specific circuit schematic diagram of the coupling module 4 is given; it can be seen that the power line 5 is connected through terminals L and N. The impedance transformer in the access unit is composed of L1 (the first inductor 411) and L2 (the second inductor 412). Terminals DY_N and DY_L are used to connect to the input end of the power supply module 3. The transformer T2 uses a transformer with the model LTC0585 - 50R. Its primary side is connected to the PLC signal in the power line 5 through the capacitor C7 (the first capacitor 415). In addition, for circuit protection, a varistor RV1 and a TVS diode TVS1 are also connected across the primary side of T2. The secondary side of the transformer T2 forms a coupling circuit through the capacitor C11 (the third capacitor 416). And signal pins for output are provided between C11 and L3 (the third inductor 413) and L4 (the fourth inductor 414). An output capacitor C12 (the second capacitor 416) with a capacitance of 470 uF is provided at the ends of L3 and L4 away from T2. The power pins of the power supply module 3 are connected to both ends of this output capacitor, so as to load the output power (48V) through L3 and L4 to VOUT+ and VOUT-. The PLC signal in the signal pins and the power signal output from the power pins are simultaneously loaded in VOUT+ and VOUT-, and are electrically connected to the track, so as to transmit the PLC signal and the power signal to the corresponding track lights through the track.

[0063] It should be noted that since the diameter of the second capacitor 416 is relatively large, in order to prevent the second capacitor 416 from being too large to be placed inside the connection box body 1, in this embodiment, as Figure 5 and Figure 10 shown, the second capacitor 416 is arranged at the end of the coupling circuit board 41, and the second capacitor 416 is placed outside the coupling circuit board 41, so that the second capacitor 416 overlaps with the coupling circuit board 41 in thickness, so as to reduce the thickness occupied by the second capacitor 416.

[0064] In some embodiments, such as Figure 10 、 Figure 6 and Figure 9As shown, the bottom of the connection box body 1 is attached to the top of the power supply box body 2. A plurality of first wiring holes 15 are provided through the bottom of the connection box body 1, a plurality of second wiring holes 21 are provided through the top of the power supply box body 2, and a third wiring hole 22 is provided through the side end of the power supply box body 2. The power cord 5 passes through the third wiring hole 22, the second wiring hole 21, and the first wiring hole 15 and is connected to the coupling module 4. In a specific embodiment, after the power cord 5 passes through the third wiring hole 22, it is divided into three wires inside the power supply box body 2: a live wire 51, a neutral wire 52, and a first ground wire 53. Among them, the live wire 51 and the neutral wire 52 pass through the second wiring hole 21 and the first wiring hole 15 and are welded to the first connection part 42. The first ground wire 53 passes through the second connection hole and the first connection hole and is connected to the conductive screw 16. The conductive screw 16 is connected to the power supply box body 2, thereby realizing the grounding of the power supply box body 2. The power supply box body 2 is made of a metal material. A runway-shaped fourth connection hole 24 is provided at the corresponding position of the top surface of the power supply box body 2 for the conductive screw 16. Further, five circular first wiring holes 15 are provided at the bottom of the connection box body 1, and one circular second wiring hole 21 and three elongated second wiring holes 21 are provided at the top of the power supply box body 2.

[0065] In some embodiments, as Figure 10 and Figure 11 shown, the connection box body 1 is connected to the power supply box body 2 by a plurality of conductive screws 16. The power cord 5 includes a first ground wire 53, and the first ground wire 53 is connected to one of the conductive screws 16. The power supply module 3 is provided with a second ground wire 32, and the second ground wire 32 is connected to another conductive screw 16. The second ground wire 32 is conducted to the first ground wire 53 through the power supply box body 2. Among them, the power supply box body 2 is made of a metal material. The second ground wire 32 and the first ground wire 53 are respectively connected to the power supply box body 3 through the conductive screws 16, realizing the grounding of the second ground wire 32. Further, grounding terminals 17 are respectively connected to the ends of the first ground wire 53 and the second ground wire 32. The conductive screw 16 passes through the grounding terminal 17 and the bottom wall of the connection box body 1 and is connected to the fourth connection hole 24 of the power supply box body 2.

[0066] In some embodiments, the power supply box body 2 is filled with AB silica gel. The functions of the AB silica gel are sealing, heat conduction, and structural reinforcement. Specifically, the power supply box body 2 includes a long cylindrical main body 25 with both ends open and end caps 23 covering both ends of the long cylindrical main body 25. The third wiring hole 22 is opened on the end cap 23. The power supply circuit board 31 is accommodated inside the power supply box body 2. Filling the inside of the power supply box body 2 with AB silica gel can not only enhance the stability of the connection between the end cap 23 and the long cylindrical main body 25, but also strengthen the stability of the power supply circuit board 31, electronic components, and wires, avoiding the desoldering of wires or electronic components; the AB silica gel can also seal the power supply circuit board 31 and electronic components; at the same time, the AB silica gel can also conduct the heat generated by the electronic components to the power supply housing to help with heat dissipation.

[0067] Further, as Figure 4 and Figure 3 shown, the connection box body 1 includes a bottom box 13 and an upper cover 14. The bottom box 13 is configured as a trough-shaped structure with an open top. The upper cover 14 is covered above the bottom box 13. A plurality of connection buckles are provided on the side of the upper cover 14. The bottom box 13 is provided with buckling holes adapted to the connection buckles. The connection buckles are buckled into the buckling holes. The upper cover 14 is fixedly connected to the bottom box 13 by two connection screws 141. One end of the bottom box 13 is provided with a telescopic buckle 132, and the other end is provided with an elastic arm buckle 135. Both the telescopic buckle 132 and the elastic arm buckle 135 protrude from the side of the bottom box 13. The telescopic buckle 132 and the elastic arm buckle 135 are used for clamping to the track 200. Among them, the telescopic buckle 132 is integrally connected with a button 133. The button 133 is arranged at the end of the connection box body 1. When the button 133 is pressed, the button 133 drives the telescopic buckle 132 to retract into the bottom box 13, so that the PLC track power supply 100 can be detached from the track 200; a return spring 134 is arranged at the end of the telescopic buckle 132 away from the button 133. When the pressing force of the button 133 disappears, the return spring 134 resets the button 133, and the telescopic buckle 132 pops out of the bottom box 13.

[0068] Further, as Figure 4 shown, two permanent magnets 142 are distributed along the extending direction on the upper cover 14. The upper surfaces of the permanent magnets 142 are flush with the upper surface of the upper cover 14; as Figure 2 shown, silicon steel sheets 220 are embedded inside the track 200. When the PLC track power supply 100 is installed on the track 200, the permanent magnets 142 are adsorbed to the silicon steel sheets 220.

[0069] In addition, it should be noted that the above embodiments can be combined with each other. For the same or similar concepts or processes, they may not be repeated in some embodiments. That is, the technical solutions disclosed in the subsequent (in the order of recording in the text) embodiments should include the technical solutions recorded in that embodiment and the technical solutions in all the embodiments before that embodiment.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A PLC track power supply, characterized in that: include: A power supply box body, wherein a power supply module is arranged inside the power supply box body, and the power supply module is used to convert alternating current into direct current; A connection box body connected to the power box body, the connection box body can be mechanically connected to the track, the connection box body is provided with a conductive member, and the conductive member is used to be electrically connected to the track; Among them, a coupling module is provided inside the connection box body, and the power module, the conductive member and the power line are electrically connected to the coupling module respectively. The coupling module is used to obtain the PLC signal on the power line and couple the obtained PLC signal to the direct current, and the direct current is output to the track through the conductive member.

2. The PLC track power supply according to claim 1, characterized in that: The power supply module includes an input end and an output end, and the coupling module includes a first connection portion, a second connection portion, a third connection portion and a fourth connection portion; The first connection portion is electrically connected to the power line, and the alternating current carrying the PLC signal is transmitted to the coupling module via the first connection portion; The second connection portion is electrically connected to the input end of the power module, and the AC power is transmitted from the second connection portion to the power module through the coupling module; The third connection portion is electrically connected to the output end of the power module, and the direct current output by the power module is transmitted to the coupling module via the third connection portion; The fourth connection portion is electrically connected to the conductive member, and the direct current coupled with the PLC signal is transmitted to the conductive member via the fourth connection portion.

3. The PLC track power supply according to claim 2, characterized in that: The first connection part, the second connection part, the third connection part and the fourth connection part are all welding holes; the power line is welded to the first connection part, the second connection part is connected to the input end of the power module through the second wire, the third connection part is connected to the output end of the power module through the third wire, and the fourth connection part is connected to the conductive member through the fourth wire.

4. The PLC track power supply according to claim 3, characterized in that: The conductive member is disposed on both sides of the connection box body, the conductive member protrudes from the side wall of the connection box body, the inner side of the conductive member is elastically supported, and the fourth wire is welded to the conductive member; Buckles are arranged on both sides of the connection box body, and the buckles are used to be clamped on the track.

5. The PLC track power supply according to claim 2, characterized in that: The coupling module includes an access unit arranged on a coupling circuit board; wherein the input end of the access unit serves as the first connection part, is connected to the power line via the power box body, and introduces multiple signals loaded in the power line, wherein an impedance transformer is provided in the access unit to form a high impedance for signals in a specified frequency band to pass through the access unit, and thus the access unit is configured to be able to pass the PLC signal in the specified frequency band with high impedance, and to pass the power supply signal in a non-specified frequency band with low impedance.

6. The PLC track power supply according to claim 5, characterized in that: The access unit is connected to the neutral line and the live line of the connected power line respectively to form the impedance transformer, so that when the first inductor and the second inductor are connected to the power supply signal through the power line, based on the frequency selection characteristics of the first inductor and the second inductor, a sudden impedance increase of the PLC signal of the specified frequency band passing through the access unit is formed.

7. The PLC track power supply according to claim 6, characterized in that: The access unit also forms the second connection part at the output end of the impedance converter, and is electrically connected to the power module through the second connection part. After the power module is connected to the power supply, the voltage conversion circuit converts the 220V AC power into 48V or 24V DC power and then outputs it through the power pin.

8. The PLC track power supply according to claim 7, characterized in that: The coupling module further comprises a bidirectional coupling unit arranged on a coupling circuit board, wherein the bidirectional coupling unit comprises a transformer and a first capacitor, and the bidirectional coupling unit accesses the PLC signal before the impedance converter in the access unit via the transformer and the first capacitor, wherein the transformer is connected in series with the first capacitor between its primary side and one end of the impedance converter of the access unit facing the access end of the power line, and is electrically connected to an output unit at its secondary side; The output unit includes a third inductor and a fourth inductor, and two output ends of the secondary side of the transformer are respectively connected in series with the third inductor and the fourth inductor, and a pin for outputting a signal to the outside is formed between the output end of the secondary side and the third inductor and the fourth inductor; The ends of the third inductor and the fourth inductor away from the transformer are respectively electrically connected to the power pins of the power module, so that: the power output by the power module can be loaded into the signal pin through the third inductor and the fourth inductor to form the fourth connecting portion, and transmitted to the lamp on the track together with the PLC signal in the signal pin; A third capacitor is connected in series between the secondary side of the transformer and the signal pin, and the third capacitor is configured so that: when the access unit is connected to the power line, the third capacitor is electrically connected to the secondary side of the transformer to form a bidirectional coupling unit with second direction selectivity for a specified frequency band, so that the bidirectional coupling unit can access the PLC signal from the secondary side of the transformer in isolation from the primary side of the transformer.

9. The PLC track power supply according to any one of claims 1 to 8, characterized in that: The bottom of the connection box body is attached to the top of the power box body, a plurality of first wiring holes are provided through the bottom of the connection box body, a plurality of second wiring holes are provided through the top of the power box body, and a third wiring hole is provided through the side end of the power box body; The power line passes through the third wiring hole, the second wiring hole and the first wiring hole to be connected to the coupling module.

10. The PLC track power supply according to any one of claims 1 to 8, characterized in that: The connection box body is connected to the power box body through a plurality of conductive screws, and the power line includes a first ground line, and the first ground line is connected to one of the conductive screws; The power module is provided with a second ground wire, the second ground wire is connected to another of the conductive screws, and the second ground wire is conducted to the first ground wire through the power box body.

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