Multi-circuit independently controllable dc contactor

Abstract

The application discloses a direct-current contactor with multiple loops capable of being independently controlled, which comprises a yoke, a main coil, at least two armatures, a moving contact, a static contact assembly and a magnetic control adsorption device corresponding to the armatures, one end of the armatures is rotatably connected to the yoke, the moving contact is installed on the armature and oppositely arranged with the static contact assembly, the main coil is sleeved outside the yoke to form an electromagnetic loop between the yoke and each armature, so that the armature is attracted by the yoke to rotate and drive the moving contact on the armature to close the corresponding static contact assembly, and the magnetic control adsorption device is correspondingly arranged on one side of the armature to adsorb the armature to prevent the armature from being attracted by the yoke to rotate. The direct-current contactor can realize independent control of multiple load control loops, save cost and space, and has a very good application prospect.

Description

Technical Field

[0001] This invention relates to the field of DC contactor technology, and in particular to a DC contactor with multiple independently controllable circuits. Background Technology

[0002] A DC contactor is an electromagnetic switch that controls the switching of large currents by switching small currents on and off. It is widely used in electric vehicles, charging piles, photovoltaics, and energy storage. Its principle is that the magnetic field generated after the contactor coil is energized causes the armature assembly to move, which in turn drives the moving contact to contact the two stationary contacts connected to the load circuit, thus making the load circuit conductive.

[0003] Currently available contactor products typically control only one load circuit. However, in practical applications, a single device often has multiple control circuits, requiring a dedicated contactor for each circuit. This increases costs, occupies significant installation space, and hinders subsequent maintenance. Therefore, developing a DC contactor capable of individually controlling multiple control circuits with a single device is a pressing issue for those skilled in the art. Summary of the Invention

[0004] The problem to be solved by the present invention is to provide a DC contactor with multiple independently controllable circuits, so as to overcome the defects of existing DC contactors that can only control the on / off of one load circuit, resulting in increased cost, large space occupation and inconvenience in maintenance.

[0005] The technical solution adopted by this invention to solve its technical problem is: a DC contactor with multiple independently controllable circuits, comprising: a yoke, a main coil, at least two armatures, and moving contacts, stationary contact components, and magnetically controlled adsorption devices corresponding to each armature. One end of each armature is rotatably connected to the yoke. The moving contacts are mounted on the armatures and are positioned opposite to the stationary contact components. The main coil is sleeved on the outside of the yoke to form an electromagnetic circuit between the yoke and each armature, so that the armature is attracted by the yoke and rotates, causing the moving contacts on it to close with the corresponding stationary contact components. The magnetically controlled adsorption devices are correspondingly arranged on one side of each armature to adsorb the respective armature, so that the armature rotates without being attracted by the yoke.

[0006] As a further improvement of the present invention, the magnetic adsorption device includes a secondary coil and an iron core, the lower end of the iron core being positioned directly opposite the top of the armature, and the secondary coil being sleeved on the outside of the iron core for magnetizing the lower end of the iron core to adsorb the armature.

[0007] As a further improvement of the present invention, the other end of the armature is provided with a magnetic attraction part, which extends to be opposite to the magnetic pole part provided on the yoke.

[0008] As a further improvement of the present invention, it also includes elastic elements that are correspondingly disposed on the armature, and the armature, under the elastic force of the corresponding elastic element, causes the magnetic attraction part to tend to move away from the magnetic pole part.

[0009] As a further improvement of the present invention, when both the main coil and the magnetically controlled adsorption device are energized, the sum of the forces exerted on the armature by the magnetically controlled adsorption device and the elastic element can overcome the force exerted by the yoke, causing the armature to rotate in the opposite direction and drive the moving contact to separate from the corresponding stationary contact assembly.

[0010] As a further improvement of the present invention, the yoke is U-shaped, the main coil is sleeved on one side wall of the yoke, and the top of the other side wall of the yoke is the magnetic pole part.

[0011] As a further improvement of the present invention, each set of stationary contact components includes two stationary contacts, which are fixedly connected to the yoke and insulated from each other.

[0012] As a further improvement of the present invention, two armatures are provided, which are rotatably connected side by side to the yoke. Correspondingly, two moving contacts, two stationary contact components, and two magnetically controlled adsorption devices are provided. There is a common stationary contact between the two stationary contact components, and the common stationary contact is arranged opposite to the two moving contacts.

[0013] As a further improvement of the present invention, the yoke is provided in two symmetrical configurations, the main coil is sleeved on two adjacent side walls of the two yokes, and at least one armature is rotatably connected to each of the two yokes located on the two side walls.

[0014] The beneficial effects of this invention are as follows: This invention provides a DC contactor with multiple independently controllable circuits. By mounting a main coil on the yoke and rotatably connecting multiple armatures, each armature is equipped with a corresponding magnetically controlled adsorption device, a moving contact, and a stationary contact assembly. By controlling the on / off state of the main coil and the secondary coil in the magnetically controlled adsorption device, the armature movement is controlled, thereby controlling the closing and opening of the moving contact and stationary contact assembly in each circuit. This achieves independent control of multiple load control circuits, eliminating the need for separate DC contactors for each circuit, greatly saving costs and installation space, and facilitating subsequent maintenance. A very small current can be used to control the on / off state of the load control circuit through the secondary coil, resulting in low energy consumption and excellent application prospects. Attached Figure Description

[0015] Figure 1 This is a perspective view of a DC contactor with multiple independently controllable circuits according to Embodiment 1 of the present invention;

[0016] Figure 2 This is a top view of a DC contactor with multiple independently controllable circuits according to Embodiment 2 of the present invention;

[0017] Figure 3 This is a side view of a DC contactor with multiple independently controllable circuits according to Embodiment 3 of the present invention.

[0018] Referring to the accompanying drawings, the following explanations are provided:

[0019] 1—Yoke; 101—Magnetic pole section;

[0020] 2—Main coil; 3—Armature;

[0021] 301 – Magnetic suction part; 4 – Moving contact;

[0022] 5 – Secondary coil; 6 – Iron core;

[0023] 7—Stationary contact; 8—Common stationary contact. Detailed Implementation

[0024] The following detailed description of three preferred embodiments of the present invention is provided in conjunction with the accompanying drawings.

[0025] Example 1

[0026] See Figure 1 The present invention provides a DC contactor with multiple independently controllable circuits, including: a yoke 1, a main coil 2, two armatures 3, two moving contacts 4 corresponding to the armatures 3, two sets of stationary contact assemblies, two magnetic adsorption devices, and two elastic elements.

[0027] The yoke 1 is U-shaped, and the main coil 2 is sleeved on the left side wall of the yoke 1. Two armatures 3 are arranged side by side, and one end of each armature 3 can be rotatably connected to the top of the left side wall of the yoke 1, specifically through a pin or the like. The other end of the armature 3 is provided with a magnetic attraction part 301. A magnetic pole part 101 is provided on the top of the right side wall of the yoke 1, and the magnetic attraction part 301 extends above the magnetic pole part 101 and is arranged opposite to it. The bottom of each armature 3 is fixedly mounted with a moving contact 4 near the magnetic attraction part 301, and the moving contact 4 is insulated from the armature 3. Each set of stationary contact assemblies includes two stationary contacts 7. The two stationary contacts 7 in the same set are used to connect to a control circuit of the load. The yoke 1 is provided with four mounting slots at intervals at the magnetic attraction part 301. The four stationary contacts 7 are arranged side by side and fixedly connected in the mounting slots, and the stationary contacts 7 are insulated from the yoke 1. The two stationary contacts 7 in the same set are arranged opposite to the corresponding moving contacts 4.

[0028] When the main coil 2 is energized, an electromagnetic circuit can be formed between the yoke 1 and the two armatures 3, so that the magnetic attraction part 301 of the two armatures 3 can be attracted by the magnetic pole part 101 of the yoke 1 and rotate downward, and drive the moving contact 4 on it to close with the corresponding two stationary contacts 7, thereby making the load control circuit where the stationary contact 7 is located conduct.

[0029] Two magnetically controlled adsorption devices are positioned one above each of the two armatures 3 to attract their respective armatures 3, ensuring that the armature 3 does not rotate even when attracted by the yoke 1. Each magnetically controlled adsorption device includes a secondary coil 5 and an iron core 6. The lower end of the iron core 6 is positioned directly opposite the top of the armature 3, and the secondary coil 5 is sleeved on the outside of the iron core 6 to magnetize the lower end of the iron core 6 and attract the armature 3.

[0030] Two elastic elements are correspondingly arranged on the two armatures 3. Under the elastic force of the corresponding elastic elements, the magnetic attraction part 301 of the armature 3 tends to move away from the magnetic pole part 101. When both the main coil 2 and the auxiliary coil 5 are energized, the sum of the forces exerted on the armature 3 by the iron core 6 and the elastic elements can overcome the force exerted by the yoke 1, causing the armature 3 to rotate upward in the opposite direction, thereby causing the moving contact 4 to separate from the corresponding stationary contact assembly. By providing elastic elements on the armature 3, it can be ensured that when both the main coil 2 and the auxiliary coil 5 are de-energized, the moving contact 4 and the stationary contact 7 can remain separated under the action of elastic force.

[0031] In this embodiment, the elastic element can be a spring, tension spring, torsion spring, etc. (not shown in the figure). For example, when using a tension spring, one end of the tension spring is connected to the bottom of the armature 3 away from the magnetic part 301, so that the tension spring exerts a downward pulling force on that end of the armature 3. As another example, when using a torsion spring, the torsion spring is fitted onto the pin between the armature 3 and the yoke 1, and the two ends of the torsion spring elastically abut against the inner sides of the armature 3 and the yoke 1, which can also achieve an elastic force on the armature 3.

[0032] In practical applications, the stationary contacts 7 of the two sets of stationary contact components are respectively connected to the two control circuits of the load. When both control circuits need to be turned on, the main coil 2 is energized and the two auxiliary coils 5 are de-energized. The iron core 6 will not generate a force to attract the armature 3. The two armatures 3 rotate under the attraction of the yoke 1, so that the moving contact 4 closes with the corresponding two stationary contacts 7, thus turning on both control circuits. When it is necessary to control one control circuit to be turned on and the other control circuit to be turned off, the auxiliary coil 5 of the control circuit to be turned off is energized, so that the iron core 6 attracts the armature 3, thus turning off the control circuit. When both control circuits need to be turned off, the main coil 2 and the two auxiliary coils 5 are de-energized. Under the elastic force of the elastic element, the moving contact 4 and the stationary contact 7 remain separated, thus turning off both control circuits. This technical solution allows for individual control of multiple control circuits using a single DC contactor, saving costs, reducing installation space, and facilitating subsequent maintenance. A very small current is required to control the on / off state of the load control circuit through the secondary coil 5, resulting in low energy consumption.

[0033] It should be noted that although the number of armature 3, moving contact 4, stationary contact assembly, magnetic adsorption device and elastic element is set to two in this embodiment, this application does not limit their number and can be configured accordingly according to actual needs. For example, there can also be three or four arranged side by side.

[0034] Example 2

[0035] In this embodiment, two armatures 3 are also provided, rotatably connected side-by-side to the yoke 1. Correspondingly, two moving contacts 4, two stationary contact assemblies, two magnetically controlled adsorption devices, and two elastic elements are also provided. The difference from Embodiment 1 is that each of the two stationary contact assemblies includes a stationary contact 7 and a common stationary contact 8 between them. The stationary contacts 7 are respectively arranged opposite to the corresponding moving contacts 4, and the common stationary contact 8 is arranged opposite to both moving contacts 4. Any moving contact 4 can close with the common stationary contact 8. Compared with Embodiment 1, this technical solution uses a shared common stationary contact 8, which can reduce material usage and make the overall size of the DC contactor smaller. However, it is not suitable for situations where two load control circuits need to be controlled simultaneously, to avoid short-circuit faults.

[0036] Example 3

[0037] The difference between this embodiment and Embodiment 1 is that: two yokes 1 are provided, symmetrically distributed with their outer walls abutting each other. The main coil 2 is sleeved on the two adjacent side walls of the two yokes 1, and at least one armature 3 is rotatably connected to each of the two side walls of the two yokes 1. The armatures 3 on the two yokes 1 are symmetrically distributed. The top of the other side wall of the two yokes 1 is a magnetic pole section 101, and a stationary contact assembly is connected to each of the two yokes 1 at the magnetic pole section 101. The working principle of this embodiment is the same as that of Embodiment 1, and will not be repeated here.

[0038] In this embodiment, multiple armatures 3 can be connected to each yoke 1, and this application does not limit the specific number. In addition, the armatures 3 connected to each yoke 1 and the stationary contact assembly in this embodiment can also be the structure in Embodiment 2, which can realize independent control of more load control loops.

[0039] Therefore, the present invention provides a DC contactor with multiple independently controllable circuits. By mounting a main coil on the yoke and rotatably connecting multiple armatures, each armature is equipped with a corresponding magnetically controlled adsorption device, a moving contact, and a stationary contact assembly. By controlling the on / off state of the main coil and the secondary coil in the magnetically controlled adsorption device, the armature movement is controlled, thereby controlling the closing and opening of the moving contact and stationary contact assembly in each circuit. This achieves independent control of multiple load control circuits, eliminating the need for separate DC contactors for each circuit, greatly saving costs and installation space, and facilitating subsequent maintenance. A very small current can be applied to the secondary coil to control the on / off state of the load control circuit, resulting in low energy consumption and excellent application prospects.

[0040] Many specific details have been set forth in the foregoing description to provide a thorough understanding of the present invention. However, the above description is merely a preferred embodiment of the present invention, and the present invention can be implemented in many other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed above. Furthermore, any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, using the methods and techniques disclosed above, without departing from the scope of the present invention. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A DC contactor with multiple independently controllable circuits, characterized in that, include: The system includes a yoke (1), a main coil (2), at least two armatures (3), a moving contact (4) corresponding to each armature (3), a stationary contact assembly, and a magnetic adsorption device. One end of each armature (3) is rotatably connected to the yoke (1). The moving contact (4) is mounted on the armature (3) and is positioned opposite to the stationary contact assembly. The main coil (2) is sleeved on the outside of the yoke (1). When the main coil (2) is energized, it can form an electromagnetic circuit between the yoke (1) and each armature (3), so that the armature (3) is attracted by the yoke (1) and rotates, causing the moving contact (4) on it to close with the corresponding stationary contact assembly. The magnetic adsorption devices are arranged one-to-one on one side of the armature (3) to adsorb the respective armature (3) so that the armature (3) is not attracted by the yoke (1) and rotates. The magnetic adsorption device includes a secondary coil (5) and an iron core (6). The lower end of the iron core (6) is set opposite the top of the armature (3). The secondary coil (5) is sleeved on the outside of the iron core (6) to magnetize the lower end of the iron core (6) to adsorb the armature (3).

2. The DC contactor with multiple independently controllable circuits according to claim 1, characterized in that: The other end of the armature (3) is provided with a magnetic attraction part (301), which extends to be opposite to the magnetic pole part (101) provided on the yoke (1).

3. The DC contactor with multi-circuit independent control according to claim 2, characterized in that: It also includes elastic elements that are correspondingly arranged on the armature (3), and the armature (3) under the elastic force of the corresponding elastic element causes the magnetic attraction part (301) to tend to move away from the magnetic pole part (101).

4. The DC contactor with multiple independently controllable circuits according to claim 3, characterized in that: When both the main coil (2) and the magnetic adsorption device are energized, the sum of the forces exerted on the armature (3) by the magnetic adsorption device and the elastic element can overcome the force exerted by the yoke (1), causing the armature (3) to rotate in the opposite direction and drive the moving contact (4) to separate from the corresponding stationary contact assembly.

5. The DC contactor with multiple independently controllable circuits according to claim 2, characterized in that: The yoke (1) is U-shaped, the main coil (2) is sleeved on one side wall of the yoke (1), and the top of the other side wall of the yoke (1) is the magnetic pole part (101).

6. The DC contactor with multiple independently controllable circuits according to claim 1, characterized in that: Each set of stationary contact components includes two stationary contacts (7), which are fixedly connected to the yoke (1) and insulated from each other.

7. The DC contactor with multiple independently controllable circuits according to claim 1, characterized in that: Two armatures (3) are provided and are rotatably connected to the yoke (1) side by side. Correspondingly, two moving contacts (4), two stationary contact components and two magnetic adsorption devices are provided. There is a common stationary contact (8) between the two stationary contact components. The common stationary contact (8) and the two moving contacts (4) are arranged opposite to each other.

8. The DC contactor with multiple independently controllable circuits according to claim 1, characterized in that: The yoke (1) is provided in two symmetrical positions. The main coil (2) is sleeved on the two adjacent side walls of the two yokes (1), and at least one armature (3) is rotatably connected to each of the two yokes (1) located on the two side walls.

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