A low-voltage starting device with voltage monitoring

Abstract

This utility model relates to the field of low-voltage starting equipment technology, specifically a low-voltage starting device with voltage monitoring, including an assembly plate. A starting component is installed on one side of the assembly plate by bolts. The assembly plate has three through-holes parallel to each other above and below the starting component. An angle plate is fixedly installed on the top of the side of the assembly plate opposite to the starting component. The angle plate fits into the external distribution cabinet bracket to facilitate the overall installation. This utility model achieves suspension positioning by pre-fitting the angle plate at the top of the assembly plate into the distribution cabinet bracket, and then forming double anchoring with the bolts fixed by the through-holes. This overcomes the installation efficiency problem of traditional equipment requiring multiple people to coordinate positioning. Furthermore, three sets of thyristor modules are connected to the upper and lower guide plates that pass through the box to form the main circuit channel, and the closed-loop control of direct monitoring of voltage transformers is integrated synchronously, solving the technical defects of spatial redundancy and response lag caused by discrete design.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage starting equipment technology, specifically a low-voltage starting device with voltage monitoring. Background Technology

[0002] Low-voltage starting equipment is an electrical device that controls the starting process of a motor. By gradually increasing the voltage to the rated operating voltage at the initial stage of startup, it effectively suppresses the overload current generated during motor startup. This equipment can avoid grid voltage fluctuations, electrical circuit overheating, and instantaneous overload damage to the mechanical transmission system caused by high current surges, ensuring safe operation of the equipment and extending its service life.

[0003] However, the installation of traditional power distribution equipment relies on the synchronous positioning of multiple bolts, which requires two operators to work together to prevent the enclosure from shifting; and the voltage monitoring unit of conventional low-voltage starting device is laid out independently of the power module, which increases the risk of control delay due to the extended signal transmission path. Utility Model Content

[0004] The purpose of this invention is to provide a low-voltage starting device with voltage monitoring to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A low-voltage starting device with voltage monitoring includes an assembly plate. A starting component is bolted to one side of the assembly plate. The assembly plate has three through-holes above and below the starting component. An angle plate is fixedly installed on the top of the assembly plate opposite to the starting component. The angle plate fits into the external power distribution cabinet bracket to facilitate the overall installation.

[0006] Preferably, the starting assembly includes a starting box, one side of which is bolted to the assembly plate, a power cord is provided through the side of the starting box away from the assembly plate, and a box cover is bolted to the side of the starting box opposite to the assembly plate.

[0007] Preferably, an extension box is fixedly installed on the side opposite to the starter box of the box cover. The extension box is connected to the box cover, and a display screen is fixedly installed on the side opposite to the box cover of the extension box. Control buttons are installed through the display screen.

[0008] Preferably, the extension box has a heat dissipation slot located below the display screen, and a circuit board is installed inside the extension box by bolts.

[0009] Preferably, the circuit board, power line, voltage transformer, display screen, and thyristor module are soldered together by wires.

[0010] Preferably, the voltage transformer is installed inside the starter box via a bracket. Inside the starter box, three sets of thyristor modules are bolted to the side adjacent to the voltage transformer. Each set of thyristor modules has an upper guide plate bolted to the top of one side.

[0011] Preferably, the upper guide plate extends through and to the outer side of the top of the starter box and is provided with upper connecting holes, and each group of thyristor modules is provided with a lower guide plate installed on one side by bolts, and the lower guide plate extends through and to the outer side of the bottom of the starter box and is provided with lower connecting holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are: This low-voltage starting device with voltage monitoring achieves suspension positioning by pre-fitting the distribution cabinet bracket with the corner plate at the top of the assembly plate, and then forming double anchoring with bolts through the through-hole assembly hole, overcoming the installation efficiency problem of traditional equipment that requires multiple people to coordinate positioning.

[0013] This low-voltage starting device with voltage monitoring uses three sets of thyristor modules to connect to the upper and lower guide plates that run through the enclosure to form the main circuit channel. It also integrates closed-loop control with direct monitoring of voltage transformers, thus solving the technical defects of spatial redundancy and response lag caused by discrete design. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the right-side structure of the present invention. Figure 3 This is a schematic diagram of the bottom structure of the starter box of this utility model; Figure 4 This is a schematic diagram of the assembly plate of this utility model; Figure 5 This is a schematic diagram of the overall planar structure of this utility model.

[0015] In the diagram: 101, Assembly board; 102, Start-up assembly; 103, Assembly hole; 104, Corner plate; 105, Start-up box; 106, Box cover; 107, Extension box; 108, Display screen; 109, Control button; 110, Heat sink; 111, Circuit board; 112, Voltage transformer; 113, SCR module; 114, Upper guide plate; 115, Upper connection hole; 116, Lower guide plate; 117, Lower connection hole; 118, Power cord. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figures 1-5 As shown, this utility model provides a technical solution: A low-voltage starting device with voltage monitoring includes an assembly plate 101. A starting component 102 is bolted to one side of the assembly plate 101. The assembly plate 101 has three through-holes 103 parallel to each other above and below the starting component 102. An angle plate 104 is fixedly installed on the top of the side of the assembly plate 101 opposite to the starting component 102. The angle plate 104 fits into the external power distribution cabinet bracket to facilitate the overall installation.

[0018] The above solution allows for accurate positioning of the mounting holes by setting through-holes in the assembly plate, pre-fixing and suspending of the equipment by fitting the corner plate into the distribution cabinet bracket, and supporting the overall weight by using the assembly plate to carry the starting components.

[0019] In this embodiment, preferably, the starting component 102 includes a starting box 105. One side of the starting box 105 is bolted to the assembly plate 101. A power cord 118 is provided through the side of the starting box 105 away from the assembly plate 101. A box cover 106 is bolted to the side of the starting box 105 opposite to the assembly plate 101.

[0020] The above solution achieves vertical positioning of the housing by bolting the starter box to the assembly plate on one side, and allows for the disassembly and maintenance of internal components by bolting the cover to the opposite side of the starter box.

[0021] In this embodiment, preferably, an extension box 107 is fixedly installed on the side opposite to the start box 105 of the box cover 106. The extension box 107 is through the box cover 106, and a display screen 108 is fixedly installed on the side opposite to the box cover 106 of the extension box 107. A control button 109 is installed through the display screen 108.

[0022] The above solution allows for the expansion of the control unit space by fixing the extension box to the box cover, enables independent power supply to the control circuit by passing the power cord through the starter box, and provides a human-machine interactive visualization function by integrating the display screen and control buttons.

[0023] In this embodiment, preferably, the extension box 107 is provided with a heat dissipation groove 110 below the display screen 108, and a circuit board 111 is installed inside the extension box 107 by bolts.

[0024] The above solution allows for the upward expulsion of hot air by creating heat sinks below the display screen, while the circuit board bolts ensure the stable positioning of the control components.

[0025] In this embodiment, preferably, the circuit board 111, power line 118, voltage transformer 112, display screen 108 and thyristor module 113 are respectively soldered together by wires.

[0026] The above method, which connects various electrical components by welding wires, can achieve reliable signal transmission.

[0027] In this embodiment, preferably, the voltage transformer 112 is installed inside the starter box 105 by a bracket. Inside the starter box 105, on the side adjacent to the voltage transformer 112, three sets of thyristor modules 113 are installed by bolts. Each set of thyristor modules 113 has an upper guide plate 114 installed on one side above it by bolts.

[0028] The above scheme achieves mechanical isolation of the monitoring unit by installing it on the voltage transformer bracket, and three sets of thyristor modules installed in parallel can achieve three-phase load balance control. The thyristor modules connected by bolts on the upper guide plate can generate a high current transmission channel.

[0029] In this embodiment, preferably, the upper guide plate 114 extends through and to the outer side of the top of the starter box 105 and is provided with upper connection holes 115. Each group of thyristor modules 113 is provided with a lower guide plate 116 installed on one side below by bolts. The lower guide plate 116 extends through and to the outer side of the bottom of the starter box 105 and is provided with lower connection holes 117.

[0030] The above scheme enables external access to the input terminal by extending the upper guide plate through the top of the starter box and providing a connection hole, and enables reliable output terminal routing by extending the lower guide plate through the bottom of the starter box and providing a connection hole. The symmetrical extension of the upper and lower guide plates ensures physical stability of the main circuit path.

[0031] In this embodiment, a low-voltage starting device with voltage monitoring is used such that, during operation, an external power supply is connected through a power line 118 passing through the starting box 105, providing the necessary power for the control circuit of the circuit board 111 (which integrates a voltage comparator and a trigger signal generator for voltage threshold judgment and SCR phase control), the display screen 108, and the voltage transformer 112; the main circuit terminals of the SCR module 113 inside the starting box 105 are physically connected to the upper guide plate 114, forming the main current input channel; the voltage transformer 112 is fixed inside the starting box 105 by a bracket, and its primary side is electrically connected to the main circuit (i.e., the line where the upper guide plate 114 is located), acquiring the main path voltage signal in real time; this signal is transmitted via a wire to the bolted section inside the extension box 107. Circuit board 111 performs analysis and processing; when circuit board 111 detects that the main circuit voltage is lower than the set threshold, it immediately drives display screen 108 to display an undervoltage warning via wires. The operator can immediately stop the startup process via the control button 109 installed through display screen 108; subsequently, after the operator confirms that the voltage is normal, the operator triggers control button 109, and circuit board 111 generates a phase-controllable trigger signal, which is transmitted to the three sets of bolt-mounted thyristor modules 113 via wires; in the initial stage, the thyristor is in a small-angle conducting state, so that the main circuit current connected through upper guide plate 114 passes through the thyristor module 113 with reduced amplitude; at this time, the voltage output by lower guide plate 116 is only a portion of the rated value, and the load equipment obtains a smooth starting torque; as the circuit board... The phase angle of the trigger signal is gradually expanded at step 111, and the conduction depth of the thyristor module 113 increases in an orderly manner. The voltage output through the lower guide plate 116 forms a continuous rising curve, allowing the load voltage to smoothly transition to the rated value under conditions without current surge. During the entire operation, the voltage transformer 112 continuously monitors the main circuit voltage. If a sudden voltage drop occurs, the circuit board 111 immediately blocks the thyristor trigger signal through wires, and simultaneously drives the display screen 108 to refresh the fault status. This closed-loop control relies on the direct wire connection architecture between the thyristor module 113, the voltage transformer 112, and the circuit board 111 to achieve rapid response. The heat dissipation system dissipates the heat from the control circuit through the heat dissipation slots 110 opened in the extension box 107, while the operating temperature rise of the thyristor module 113 is controlled by the metal bolts. The upper guide plate 114 and lower guide plate 116 are naturally diffused, utilizing their large surface area exposed outside the enclosure to improve heat exchange efficiency. The entire equipment is bolted to the distribution cabinet bracket through through-holes 103 parallel to the top and bottom of the assembly plate 101. At the same time, the corner plate 104 welded to the top of the assembly plate 101 forms an embedded interlocking structure with the bracket (the corner plate 104 is pre-fitted into the bracket to temporarily suspend the equipment, allowing a single operator to complete the positioning, and then it is fixed by bolts through the assembly holes 103). This dual fixing mechanism suppresses the mechanical vibration displacement of the exposed connection terminals (i.e., the main circuit input and output points) of the upper guide plate 114 / lower guide plate 116 within a safe range, avoiding increased contact resistance caused by loose bolt connections during long-term operation.The bolted installation and wire welding of each functional module form a physical synergy: the through structure of the cover 106 and the extension box 107 achieves physical separation between the control unit and the power unit; the upper guide plate 114 / lower guide plate 116 penetrates the starter box 105 to form a current channel while providing additional structural anchoring points; the entire system achieves a balance between voltage monitoring accuracy and flexible start-stop reliability within a compact space.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low voltage starting device with voltage monitoring comprising an assembly plate (101), characterized in that: The assembly plate (101) is bolted to one side to install a starting component (102). The assembly plate (101) has three through-holes (103) on the top and bottom of the starting component (102). An angle plate (104) is fixedly installed on the top of the assembly plate (101) opposite to the starting component (102). The angle plate (104) fits into the external power distribution cabinet bracket to facilitate the overall installation.

2. A low voltage starting device with voltage monitoring according to claim 1, characterized in that: The starting assembly (102) includes a starting box (105), one side of which is bolted to the assembly plate (101), and a box cover (106) is bolted to the side of the starting box (105) opposite to the assembly plate (101).

3. A low voltage starting device with voltage monitoring according to claim 2, characterized in that: An extension box (107) is fixedly installed on the side opposite to the starter box (105) of the box cover (106). A power cord (118) is provided through the side of the starter box (105) away from the assembly plate (101). The extension box (107) is connected to the box cover (106), and a display screen (108) is fixedly installed on the side opposite to the box cover (106). A control button (109) is installed through the display screen (108).

4. A low voltage starting device with voltage monitoring according to claim 3, characterized in that: The extension box (107) is located below the display screen (108) and has a heat dissipation slot (110). A circuit board (111) is installed inside the extension box (107) by bolts.

5. A low voltage starting device with voltage monitoring according to claim 4, characterized in that: The circuit board (111), power line (118), voltage transformer (112), display screen (108) and thyristor module (113) are respectively soldered together by wires.

6. A low voltage starting device with voltage monitoring according to claim 5, characterized in that: The voltage transformer (112) is installed inside the starter box (105) by a bracket. Three sets of thyristor modules (113) are installed inside the starter box (105) on the side adjacent to the voltage transformer (112) by bolts. Each set of thyristor modules (113) has an upper guide plate (114) installed on one side above it by bolts.

7. A low voltage starting device with voltage monitoring according to claim 6, characterized in that: The upper guide plate (114) extends through and to the outer side of the top of the starter box (105) and is provided with upper connection holes (115). Each group of thyristor modules (113) is provided with a lower guide plate (116) installed on one side below by bolts. The lower guide plate (116) extends through and to the outer side of the bottom of the starter box (105) and is provided with lower connection holes (117).

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