CN221040975U - Star-delta starting electric appliance - Google Patents

Abstract

The application discloses a star-delta starting electrical appliance, which comprises a shell, a main contact device and a star-delta contact device, wherein the main contact device and the star-delta contact device are arranged in the shell; the main contact device comprises a first electromagnetic system, and the star-delta contact device comprises a second electromagnetic system; the first electromagnetic system comprises a first coil assembly, a first magnetic yoke, a first armature and a first reset structure; the second electromagnetic system comprises a second coil assembly, a second magnetic yoke, a second armature and a second reset structure; the length direction of the first magnetic yoke is perpendicular to the length direction of the second magnetic yoke, the length direction of the first armature is identical to the length direction of the first magnetic yoke, and the length direction of the second armature is identical to the length direction of the second magnetic yoke; the application has the characteristic of more compact product.

Description

Star-delta starting electric appliance

Technical Field

The application relates to the field of low-voltage switch electricity, in particular to a star-delta starting electrical appliance for starting a motor.

Background

The star-delta starting device is also called star-delta step-down starting device, is a common motor starting circuit, and is formed by complex wiring through a plurality of parts such as contactors, thermal relays, time relays and the like.

With the continuous research and development of the technology by those skilled in the art, an integrated star-delta starting switch is designed, such as CN116453907A, and an intelligent integrated contactor is disclosed, which integrates a star contactor, an angular contactor and a main contactor, and wiring can be completed only by connecting a motor winding, a three-phase power supply and terminals of the contactor, so that compared with the traditional star-delta starting device, the intelligent integrated contactor has simpler structure and more convenient wiring.

The two groups of electromagnetic systems in the integrated star-delta starting switch have the same parameter specification, the magnet yokes and the magnet armatures in the two groups of electromagnetic systems are identical in length direction and are arranged side by side, and the arrangement mode can cause the overall size of the product to be longer, which is not ideal for some users.

Therefore, how to design a new internal arrangement of electromagnetic system to meet the needs of customers is a research-worthy direction.

Disclosure of Invention

In view of the above, the application aims to overcome the defects in the prior art, and aims to provide a star-delta starting electrical appliance, which has the advantages of more compact product and the like.

The application provides a star-delta starting electrical appliance, which comprises a shell, a main contact device and a star-delta contact device, wherein the main contact device and the star-delta contact device are arranged in the shell; the main contact device comprises a first electromagnetic system, and the star-delta contact device comprises a second electromagnetic system; the first electromagnetic system comprises a first coil assembly, a first magnetic yoke, a first armature and a first reset structure; the second electromagnetic system comprises a second coil assembly, a second magnetic yoke, a second armature and a second reset structure; the length direction of the first magnetic yoke is perpendicular to the length direction of the second magnetic yoke, the length direction of the first armature is identical to the length direction of the first magnetic yoke, and the length direction of the second armature is identical to the length direction of the second magnetic yoke.

Because the length dimension of the electromagnetic system is basically determined by the lengths of the magnet yoke and the armature, the two groups of magnet yokes of the electromagnetic system are different in length direction, more specifically, the length direction of the first magnet yoke is in vertical relation with the length direction of the second magnet yoke, and compared with the prior art, the structure can necessarily reduce the length dimension of the shell, meets the requirements of users on the product length, and is suitable for the environment with limited length dimension.

In some embodiments of the present application, the parameter specification of the first electromagnetic system is smaller than the parameter specification of the second electromagnetic system, the length direction of the first magnetic yoke is parallel to the width direction of the star-delta starting switch, and the length direction of the second magnetic yoke is parallel to the length direction of the star-delta starting switch.

By adopting the structure, the electromagnetic system with two specifications can be arranged in the product, and the small-specification electromagnetic system and the large-specification electromagnetic system adopt the arrangement mode, so that the space in the product can be better utilized, the product is more compact, and the product is more miniaturized.

In some embodiments of the present application, the housing includes a base, a first space is formed on the base, and a first electromagnetic system installation portion and a second electromagnetic system installation portion are disposed on a bottom surface of the first space.

By adopting the structure, the two groups of electromagnetic systems can be effectively positioned by adopting the design of the two mounting parts on the base, so that the first electromagnetic system and the second electromagnetic system are more convenient to mount.

In some embodiments of the present application, the main contact device includes a main contact support, an active contact bridge group, a first main static contact bridge group and a second main static contact bridge group, the main contact support is slidably disposed in the housing and fixed on the first armature, the first main static contact bridge group and the second main static contact bridge group are disposed on two sides of the main contact support, and the active contact bridge group is disposed on the main contact support and slides with the main contact support to achieve connection and disconnection with the two main static contact bridge groups; the star-delta contact device comprises a second contact support, a corner movable contact bridge group, a first corner static contact bridge group and a second corner static contact bridge group, wherein the second contact support is arranged in a shell in a sliding manner and is fixed on a second armature; each static contact bridge in the first corner static contact bridge group corresponds to each static contact bridge in the second main static contact bridge group one by one and is electrically connected.

By adopting the structure, the internal contact structure adopts the connection, so that the angular connection between the star-delta contact device and the main contact device can be effectively realized, and the situation that a user additionally performs external wiring to form the angular connection is avoided.

In some embodiments of the present application, each static contact bridge in the first corner static contact bridge group is electrically connected to each static contact bridge in the second main static contact bridge group through a transition conductor, where the transition conductor is in a split structure or an integrated structure with the static contact bridge in the first corner static contact bridge group and the static contact bridge in the second main static contact bridge group.

By adopting the structure, the transition conductor can be of a split type structure or an integrated structure, and when the transition conductor is of an integrated structure, the static contact bridge in the first corner static contact bridge group and the static contact bridge in the second main static contact bridge group are integrated, and the transition conductor is relatively complex in processing and forming, does not need to be matched, so that the transition conductor is very convenient. When the structure is split, the static contact bridge in the first corner static contact bridge group is connected with the static contact bridge in the second main static contact bridge group through the transition conductor in a split mode, so that the processing and forming are simpler, and the additional matching is needed. In either way, it is achieved that the user does not need to additionally make external wiring to form the angle connection.

In some embodiments of the application, the shell comprises an insulating housing, insulating channels corresponding to the transition conductors one by one are arranged in the insulating housing, and the insulating channels are sequentially distributed in the height direction of the star-delta starting electrical appliance.

By adopting the structure, the three transition conductors can be effectively separated by the insulating channel, the insulating performance among the three-phase conductors is ensured, and the creepage distance is increased.

In some embodiments of the present application, the shell is further provided with inter-phase isolation ribs, where the inter-phase isolation ribs are used to separate each static contact bridge in the first corner static contact bridge group or/and each static contact bridge in the second main static contact bridge group; the wall of the insulating channel is provided with a slot, and the inter-phase isolation ribs are inserted into the slot.

By adopting the structure, the interphase isolation ribs are arranged, and the interphase isolation ribs are matched with the insulation channels in a plugging manner, so that the insulation performance between three phases is better.

In some embodiments of the present application, the shell is further provided with inter-phase isolation ribs, the inter-phase isolation ribs are used for separating each static contact bridge in the first corner static contact bridge group or/and each static contact bridge in the second main static contact bridge group, gaps are formed in the inter-phase isolation ribs, and at least one part of the transition conductor is embedded into the gaps.

By adopting the structure, the transition conductor and the interphase isolation ribs are more tightly matched by utilizing the arrangement of the gaps, so that the transition conductor and the interphase isolation ribs are more compact, occupation of space is reduced, the interphase isolation ribs can be utilized to limit the transition conductor, wiring is facilitated, and miniaturization of products is promoted.

In some embodiments of the present application, a first incoming line terminal set is disposed on a side surface of the housing, and the first incoming line terminal set is electrically connected to the first corner static contact bridge set and the second main static contact bridge set; the first incoming line terminal set is located between the main contact device and the star-delta contact device.

With this structure, the first incoming line terminal group is provided at such a position that the product looks more coordinated.

In some embodiments of the present application, a phase-to-phase separation portion is disposed at a position of the housing corresponding to the first incoming line terminal group, and the phase-to-phase separation portion is used for separating each terminal in the first incoming line terminal group.

By adopting the design of the interphase isolation part, the creepage distance between the terminals in the first incoming line terminal group can be effectively ensured, and the effect of protecting the terminals is achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view showing a star delta starting electrical appliance of embodiment 1 of the present application;

FIG. 2 is a schematic view showing a structure of a base in accordance with an embodiment 1 of the present application;

FIG. 3 is a schematic view showing the structure of the base in accordance with another aspect of embodiment 1 of the present application;

FIG. 4 is a schematic view showing a structure of a base in accordance with an embodiment 1 of the present application;

Fig. 5 is a schematic view showing a structure of an insulating housing in embodiment 1 of the present application;

Fig. 6 is a schematic view showing a structure of an insulating housing in embodiment 1 of the present application from another view angle;

Fig. 7 is a schematic diagram showing the structure of the star-delta starting electrical apparatus of embodiment 1 of the present application after the electrical apparatus is uncapped;

fig. 8 is a schematic diagram showing the structure of the first and second electromagnetic systems in embodiment 1 of the present application;

FIG. 9 is a schematic view showing the structure of the main, star and angular contact assembly in embodiment 1 of the present application;

FIG. 10 is a schematic view showing the structure of a star contact assembly in embodiment 1 of the present application;

FIG. 11 is a diagram showing the structural relationship between the transition conductor and the insulating housing of embodiment 1 of the present application;

FIG. 12 is a cross-sectional view showing the cooperation of the cover, base, and controller in embodiment 1 of the present application;

Fig. 13 is a schematic diagram showing the cooperation between the first yoke, the second yoke and the base in embodiment 1 of the present application;

FIG. 14 is a schematic diagram showing the cooperation of the interphase separating rib and the transition conductor in embodiment 1 of the present application;

fig. 15 shows a schematic diagram of the star-delta starting electrical appliance of embodiment 1 of the present application applied to a motor starting circuit.

Description of the embodiments

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "primary," "secondary," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "primary" or "secondary" may include one or more such feature, either explicitly or implicitly. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a primary feature "up" or "down" a secondary feature may be a direct contact of the primary and secondary features, or an indirect contact of the primary and secondary features through an intervening medium. Moreover, a main feature "above", "over" and "above" a second feature may be that the main feature is directly above or obliquely above the second feature, or simply that the main feature level is higher than the second feature. The main feature "under", "below" and "beneath" the second feature may be the main feature directly under or obliquely under the second feature, or simply indicate that the main feature is electrically connected to a three-phase power source at a higher level than the second feature.

Examples

As shown in fig. 1 to 15, an embodiment of the present application provides a star-delta starting electrical appliance, which includes a housing 1, a main contact device 2, a star-delta contact device 3, and a controller 4.

The housing 1 accommodates components of the main contact 2, the star-delta contact 3 and the controller 4, and in the present embodiment, the housing 1 is composed of a plurality of sub-housings 1, and the sub-housings 1 are a base 11, a base 12, a main contact top 13, a star-delta contact top 14, an insulating cover 15 and a cover 16, respectively. The base 11 is partitioned into a first space 11a and a second space 11b by a partition plate 11c, the first space 11a including a main contact device mounting area 11a1 and a star-delta contact device mounting area 11a2 in this order along its length direction. The base 12 is disposed above the base 11 (screw fastening is adopted between the two, but a snap fastening may be adopted in addition to the above), and includes a main contact device mounting area 11a1 and a star-delta contact device mounting area 11a2 along the length direction thereof. The main contact top cover 13 is disposed above the base 12 (screw fastening is adopted between the main contact top cover 13 and the base 12, and the main contact placement area 11a1 of the base 11 and the main contact top cover 13 together form a space for accommodating the main contact 2. Together, the star-contact device cover 14, the base 12, and the star-contact device mounting region 11a2 of the base 11 form a space for accommodating the star-contact device 3. The second space 11b cooperates with the cover 16 to form a cavity accommodating the controller 4, and the controller 4 is located entirely below the main contact device 2 and the star-delta contact device 3. The above structure is only a preferable scheme of the shell 1, the shell 1 can also be adaptively deformed, for example, the main contact device 2 and the star-delta contact device 3 are respectively independent shells 1 (the base 11 can also be said to be composed of the base 11 of the main contact device 2 and the base 11 of the star-delta contact device 3, the base 12 is composed of the base 12 of the main contact device 2 and the base 12 of the star-delta contact device 3), and then the shells 1 are connected together through fastening connection or screw fastening or rivet fastening. The housing 1 of any type can be secured to have the components accommodating the main contact device 2, the star-delta contact device 3, and the controller 4, and has the effect of protecting the components.

The controller 4 comprises a circuit board assembly of an MCU, a control program is arranged in the MCU, and the MCU is used for controlling the start of the star-delta starting electric appliance. Specifically, the MCU is configured to control the on/off of the first coil assembly 222 and the second coil assembly 322, so that the main contact assembly, the star contact assembly, and the angular contact assembly are turned on and off to realize the start of the star delta starting electrical appliance. Of course, the control device can adopt DSP, CPU, MPU and the like besides adopting the MCU, so long as a certain control logic can be realized through a built-in program, and the start of the star-delta starting electric appliance can be controlled. As shown in fig. 7, the controller 4 is located entirely below the main contact device 2 and the star-delta contact device 3, but the controller 4 may alternatively be located only below the main contact device 2 or below the star-delta contact device 3. In order to facilitate the assembly of the controller 4, a first opening 11b1 is provided at the bottom of the base 11 in the second space 11b, and a cover 16 is used to close the first opening 11b1. Of course, the opening is not limited to the opening at the bottom, and other surfaces of the base 11 may be used, as long as the opening is located near the controller 4 to facilitate the disassembly and assembly of the controller 4. There are many ways to fix the cover 16, which may be fixed to the base 11, for example, detachable fixing by using a buckle, a screw, or the like, or fixing by using an adhesive; the cover 16 may be fixed to the controller 4 or the partition plate 11c by screws, and in this embodiment, the cover 16 is fixed to the controller 4 and the partition plate 11c by screws (not shown).

As shown in fig. 7 to 9, the main contact device 2 includes a main contact assembly, a main contact support 21 for driving the main contact assembly on/off, and a first electromagnetic system 22 for driving the main contact support 21 to move.

As shown in fig. 7-9, the first electromagnetic system 22 sequentially includes, from bottom to top, a first yoke 221, a first coil assembly 222, and a first armature 223, where the first yoke 221 and the first armature 223 form an electromagnet, and a first reset structure 224 is disposed between the first yoke 221 and the first armature 223. The first return structure 224 is a compression spring, and it is needless to say that, other than the compression spring, a torsion spring, a spring piece, or the like may be used as long as it can ensure that a return force is generated after the first armature 223 moves. The main contact support 21 is fixed with the first armature 223, and the main contact support 21 is located above the first armature 223. The specific working flow is as follows: when the first coil assembly 222 is energized, the first magnetic yoke 221 attracts the first armature 223 to move downward, and the first reset structure 224 compresses to generate a reset force; when the first coil assembly 222 is de-energized, the attractive force is lost and the first armature 223 returns to its original position under the return force of the first return structure 224.

As shown in fig. 7-9, the main contact assembly includes an active contact bridge set 231, a first main static contact bridge set 232, a second main static contact bridge set 233, and a main contact assembly biasing member, where the number of contact bridges in the active contact bridge set 231, the first main static contact bridge set 232, and the second main static contact bridge set 233 is three and corresponds to the number of windings of the motor M. The active contact bridge set 231 and the main contact assembly biasing member (not shown in the drawings, the biasing member is a spring, but other elastic structures such as a shrapnel and a torsion spring may be adopted) are disposed on the main contact support 21, and the first main static contact bridge set 232 and the second main static contact bridge set 233 are disposed on two sides (on the corresponding area of the base 12) of the main contact support 21 respectively. When the first coil assembly 222 is energized, the active contact bridge set 231 is brought into contact with the two main static contact bridge sets along with the main contact support 21, and the main contact assembly biasing member is now able to ensure that the active contact bridge set 231 is in full contact (medium pressure) with the two main static contact bridge sets.

As shown in fig. 7-9, the star-angle contact device 3 comprises a star contact assembly, an angle contact assembly, a second contact support 31 for driving the star contact assembly and the angle contact assembly to be connected and disconnected, and a second electromagnetic system 32 for driving the second contact support 31 to move.

As shown in fig. 7-9, the second electromagnetic system 32 sequentially includes, from bottom to top, a second yoke 321, a second coil assembly 322, and a second armature 323, which form an electromagnet, and a second reset structure 324 is disposed between the second yoke 321 and the second armature 323. The second restoring structure 324 is a compression spring, and it is needless to say that, other than the compression spring, a torsion spring, a spring piece, etc. may be used, as long as it can ensure that a restoring force is generated after the second armature 323 moves. The second contact support 31 is fixed with the second armature 323, and the second contact support 31 is located above the second armature 323. The specific working flow is as follows: when the second coil assembly 322 is energized, the second yoke 321 attracts the second armature 323 to move downward, and the second reset structure 324 compresses to generate a reset force; when the second coil assembly 322 is de-energized, the attractive force is lost and the second armature 323 is returned to its original position by the return force of the second return structure 324.

As shown in fig. 7-9, the angular contact assembly includes an angular movable contact bridge group 331, a first angular static contact bridge group 332, a second angular static contact bridge group 333, and angular contact assembly biasing members, where the number of contact bridges in the angular movable contact bridge group 331, the second angular static contact bridge group 333, and the second angular static contact bridge group 333 is three, which corresponds to the number of windings of the motor M. The angular contact bridge set 331 and the angular contact assembly biasing member (which are springs, but may also adopt elastic structures such as spring plates and torsion springs) are disposed on the second contact support 31, and the first angular contact bridge set 332 and the second angular contact bridge set 333 are disposed on two sides (on the corresponding area of the base 12) of the second contact support 31. When the second coil assembly 322 is energized, the angular contact bridge set 331 is brought into contact with the second contact support 31 and the two angular contact bridge sets, and the angular contact assembly biasing member is able to ensure that the second contact support 31 is in full contact (medium pressure) with the two angular contact bridge sets.

As shown in fig. 7-9, the star contact assembly includes a star movable contact bridge group 341, a star static contact bridge group 342, and a star contact assembly biasing member, where the number of contact bridges in the star movable contact bridge group 341 and the star static contact bridge group 342 is three and corresponds to the number of windings of the motor M. The star-moving contact bridge set 341 and the star-contacting component biasing member (which is a spring, but may also adopt a structure with elastic force such as a shrapnel and a torsion spring) are disposed on the second contact support 31, and the star-moving contact bridge set 342 is disposed on one side of the second contact support 31. When the second coil assembly 322 is not energized, the star-movable contact bridge set 341 is in contact with the star-stationary contact bridge set 342 to achieve a connection, and the star-contact assembly biasing member can ensure that the star-movable contact bridge set 341 is in full contact (medium pressure) with the two star-stationary contact bridge sets 342. When the second coil assembly 322 is energized, the star-to-star contact bridge set 341 is separated from the star-to-star contact bridge set 342 along with the second contact support 31. The three contact bridges in the star-shaped movable contact bridge group 341 are mutually shorted by an electrical conductor (in order to form a star-shaped connection), and the shorting mode can be a flexible wire 341a, a flexible connection, a flexible conductive braid, a hard busbar and the like, so long as the conductors can realize the shorting between the three.

In this embodiment, the star contact assembly is located above the angular contact assembly, and the two are in a mechanical interlocking relationship, that is, when the star contact assembly is turned on, the angular contact assembly is broken; when the star contact assembly is disconnected, the angular contact assembly is connected. Meanwhile, the star contact assembly is normally closed, that is, when the star delta starting electric appliance does not operate, the star contact assembly is in an on state.

As shown in fig. 2 to 3, 14, a first electromagnetic system mounting portion 11c1 and a second electromagnetic system mounting portion 11c2 are provided on the surface of the partition plate 11c, the first electromagnetic system mounting portion 11c1 is for accommodating the first yoke 221, the second electromagnetic system mounting portion 11c2 is for accommodating the second yoke 321, and in this embodiment, the longitudinal direction of the first yoke 221 is disposed at an angle of 90 ° with respect to the longitudinal direction of the second yoke 321. The length direction of the first armature 223 is the same as the length direction of the first yoke 221, and the length direction of the second armature 323 is the same as the length direction of the second yoke 321. The length direction of the second yoke 321 is parallel to the length direction of the star-delta start switch, and the length direction of the first yoke 221 is parallel to the width direction of the star-delta start switch.

As shown in fig. 9 and 15, a first incoming wire connection set 1111 is exposed on one side of the outside of the casing 1, a first outgoing wire connection set 1112 and a second outgoing wire connection set 1113 are exposed on the other side, and the number of terminals inside each of the first outgoing wire connection set 1112, the first incoming wire connection set 1111 and the second outgoing wire connection set 1113 is three, which is consistent with the number of three-phase power supply and motor M windings. The first wire-outlet connection set 1112 is electrically connected to one end of the motor M winding, the first wire-inlet connection set 1111 is electrically connected to the three-phase power supply, and the second wire-outlet connection set 1113 is electrically connected to the other end of the motor M winding.

As shown in fig. 9, each terminal in the first outgoing line connection set 1112 is electrically connected to each contact bridge in the first main static contact bridge set 232 set in the housing 1, where in this embodiment, each terminal in the first outgoing line connection set 1112 and each contact bridge in the first main static contact bridge set 232 set are integrally formed, and of course, this integrally formed manner may also be used to form separately and then connect with an electrical conductor, where the electrical conductor may be a flexible wire, a flexible connection, a flexible conductive braid, or a hard busbar.

As shown in fig. 9 and 11, each terminal in the first incoming line connection set 1111 is electrically connected with each contact bridge in the second main static contact bridge set 233 and each contact bridge in the first corner static contact bridge set 332 in the housing 1 through the transition conductor D1, that is, each terminal in the first incoming line connection set 1111, the static contact bridge in the first corner static contact bridge set 332 and the static contact bridge in the second main static contact bridge set 233 are electrically connected through one transition conductor D1, where the transition conductor D1, the terminal in the first incoming line connection set 1111, the static contact bridge in the first corner static contact bridge set 332 and the static contact bridge in the second main static contact bridge set 233 are an integral part, and the structure of the integral part greatly improves the working efficiency and avoids tedious connection. Of course, an integral structure is not required here, that is, the transition conductor D1 is a flexible wire, a flexible connection, a flexible conductive braid, or a hard busbar, and is connected with the terminal in the corresponding first wire inlet wiring group 1111, the static contact bridge in the first corner static contact bridge group 332, and the static contact bridge in the second main static contact bridge group 233, so that the split structure is more convenient to process and form, but requires a worker to wire again. In either form of construction, the wiring for the user can be reduced as long as the electrical connection is ensured here.

As shown in fig. 5, 11 and 15, the insulating housing 15 is disposed on one side of the base 12, three insulating channels 151 are disposed on a surface of the insulating housing 15 facing the main contact device 2 and the star-delta contact device 3, the three insulating channels 151 are sequentially arranged in a height direction of the star-delta starting electrical appliance, and three transition conductors D1 are correspondingly disposed in the three insulating channels 151. The base 12 is provided with 5 inter-phase isolation ribs 12a, where the inter-phase isolation ribs 12a are disposed between the static contact bridges in the first corner static contact bridge group 332 and between the static contact bridges in the second main static contact bridge group 233, so as to increase the creepage distance between the static contact bridges in the first corner static contact bridge group 332 and between the static contact bridges in the second main static contact bridge group 233. A slot 151a is formed in a channel wall of the insulating channel 151, and the inter-phase isolation ribs 12a are inserted into the slot 151 a. In order to make the whole assembly more compact, the interphase separating rib 12a is also provided with a notch 12a1, and at least a part of the transition conductor D1 is embedded into the notch 12a 1.

The insulating housing 15 is provided with a phase separation portion 152 on a side remote from the main contact device 2 and the star-delta contact device 3. The terminals of the first incoming wire connection group 1111 are disposed in the phase separation portion 152, and the first incoming wire connection group 1111 is located near the middle position in the length direction of the insulating housing 15, that is, between the main contact device 2 and the star-delta contact device 3.

As shown in fig. 9, each terminal in the second connection set 1113 is electrically connected to each static contact bridge in the star static contact bridge set 342 and each static contact bridge in the second corner static contact bridge set 333. In this embodiment, each terminal in the second wiring set 1113 and each static contact bridge in the second corner static contact bridge set 333 are in an integral structure, each static contact bridge in the star static contact bridge set 342 is bent after extending and electrically connected with each terminal in the second wiring set 1113, and the structure of bending after extending may not be adopted here, for example, a section of conductor may be adopted for connection, and the conductor may be one of a hard busbar, a flexible conductor, a flexible connection and a flexible conductive braid. Of course, besides, each terminal in the second connection set 1113 may be changed to an integral structure with each static contact bridge in the star static contact bridge set 342, and each static contact bridge in the second corner static contact bridge set 333 may be electrically connected to each terminal in the second connection set 1113 by bending after extending, or may not adopt a structure of bending after extending, for example, a section of conductor may be used for connection, and the conductor may be one of a hard busbar, a soft wire, a soft connection, and a soft conductive braid. Likewise, it is also possible to change the terminal in the second connection group 1113, the static contact bridge in the star static contact bridge group 342, and the static contact bridge in the second corner static contact bridge group 333 into separate structures, and then electrically connect them through conductors. In either case, electrical connection may be achieved.

After the conductive connection structure is adopted, an angular connection method can be formed together with the motor M winding when the main contact assembly and the angular contact assembly are both connected. When both the star contact assembly and the main contact assembly are on, a star connection can be formed together with the motor M winding.

At the beginning of starting the motor M, the controller 4 drives the first electromagnetic system 22 to turn on the main contact assembly because the star contact assembly is normally closed, and the star contact assembly, the main contact assembly, and the motor M windings form a star connection. When the motor is running for a certain time (which is common knowledge to a person skilled in the art, a conventional star delta starting circuit also contains this time, which can be controlled by a clock circuit inside the MU or a time relay in the circuit), the energization of the second electromagnetic system 32 is controlled to switch to the angular connection. And the same is true. When the star delta startup circuit is off, the first electromagnetic system 22 and the second electromagnetic system 32 are powered off.

As shown in fig. 15, when the star-delta starter is applied to the motor M starting circuit, the user only needs to wire (electrically connect) the three-phase power supply with the first wire inlet wire connection set 1111, one end of the motor M winding with the first wire outlet wire connection set 1112, and the other end of the motor M winding with the second wire connection set 1113. The start of the motor M can then be achieved by the controller 4 activating the star-delta starting appliance.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A star-delta starting electrical appliance comprises a shell (1), a main contact device (2) and a star-delta contact device (3), wherein the main contact device (2) and the star-delta contact device (3) are arranged in the shell (1); the main contact device (2) comprises a first electromagnetic system, and the star-delta contact device (3) comprises a second electromagnetic system; the first electromagnetic system comprises a first coil assembly (222), a first yoke (221), a first armature (223), and a first return structure (224); the second electromagnetic system includes a second coil assembly (322), a second yoke (321), a second armature (323), and a second return structure (324); the method is characterized in that: the length direction of the first magnetic yoke (221) is perpendicular to the length direction of the second magnetic yoke (321), the length direction of the first armature (223) is identical to the length direction of the first magnetic yoke (221), and the length direction of the second armature (323) is identical to the length direction of the second magnetic yoke (321).

2. The star delta starting electrical appliance of claim 1, wherein: the parameter specification of the first electromagnetic system is smaller than that of the second electromagnetic system, the length direction of the first magnetic yoke (221) is parallel to the width direction of the star-delta starting electric appliance, and the length direction of the second magnetic yoke (321) is parallel to the length direction of the star-delta starting electric appliance.

3. The star delta starting electrical appliance of claim 1, wherein: the shell (1) comprises a base (11), a first space (11 a) is formed in the base (11), and a first electromagnetic system installation part (11 c 1) and a second electromagnetic system installation part (11 c 2) are arranged on the bottom surface of the first space (11 a).

4. The star delta starting electrical appliance of claim 1, wherein: the main contact device (2) comprises a main contact support (21), an active contact bridge group (231), a first main static contact bridge group (232) and a second main static contact bridge group (233), wherein the main contact support (21) is arranged in the shell (1) in a sliding manner and is fixed on the first armature (223), the first main static contact bridge group (232) and the second main static contact bridge group (233) are respectively arranged at two sides of the main contact support (21), and the active contact bridge group (231) is arranged on the main contact support (21) and slides along with the main contact support (21) to realize connection and separation with the two main static contact bridge groups; the star-delta contact device (3) comprises a second contact support (31), a corner movable contact bridge group (331), a first corner static contact bridge group (332) and a second corner static contact bridge group (333), wherein the second contact support (31) is arranged in the shell (1) in a sliding manner and is fixed on the second armature (323), the first corner static contact bridge group (332) and the second corner static contact bridge group (333) are respectively arranged at two sides of the second contact support (31), and the corner movable contact bridge group (331) is arranged on the second contact support (31) and slides along with the main contact support (21) to realize connection and separation with the two corner static contact bridge groups; each static contact bridge in the first corner static contact bridge group (332) corresponds to each static contact bridge in the second main static contact bridge group (233) one by one and is electrically connected.

5. The star-delta starting electrical appliance of claim 4, wherein: each static contact bridge in the first corner static contact bridge group (332) group is connected with each static contact bridge in the second main static contact bridge group (233) group through a transition conductor (D1) to form electric connection, and the transition conductor (D1) is in a split structure or an integrated structure with the static contact bridge in the first corner static contact bridge group (332) group and the static contact bridge in the second main static contact bridge group (233).

6. The star-delta starting electrical appliance of claim 5, wherein: the shell (1) comprises an insulating housing (15), insulating channels (151) which are in one-to-one correspondence with the transition conductors (D1) are arranged in the insulating housing (15), and the insulating channels (151) are sequentially distributed in the height direction of the star-delta starting electric appliance.

7. The star-delta starting electrical appliance of claim 6, wherein: the shell (1) is also provided with a spacing rib (12 a), and the spacing rib (12 a) is used for separating each static contact bridge in the first corner static contact bridge group (332) or/and each static contact bridge in the second main static contact bridge group (233); the channel wall of the insulating channel (151) is provided with a slot (151 a), and the inter-phase isolation ribs (12 a) are inserted into the slot (151 a).

8. The star-delta starting electrical appliance of claim 5, wherein: the shell (1) is also provided with a interphase isolation rib (12 a), the interphase isolation rib (12 a) is used for separating each static contact bridge in the first corner static contact bridge group (332) or/and each static contact bridge in the second main static contact bridge group (233), a gap (12 a 1) is formed in the interphase isolation rib (12 a), and at least one part of the transition conductor (D1) is embedded into the gap (12 a 1).

9. The star-delta starting electrical appliance of claim 4, wherein: a first incoming line terminal group (1111) is arranged on one side surface of the shell (1), and the first incoming line terminal group (1111) is electrically connected with the first corner static contact bridge group (332) and the second main static contact bridge group (233); the first incoming line terminal group (1111) is located between the main contact device (2) and the star-delta contact device (3).

10. The star delta starting electrical appliance of claim 7, wherein: the shell (1) is provided with a phase separation part (152) corresponding to the first incoming line terminal group (1111), and the phase separation part (152) is used for separating each terminal in the first incoming line terminal group (1111).