Resettable non-wasting ac contactor

Abstract

The utility model relates to AC contactor technical field especially relates to a kind of reset non-power AC contactor.Although existing non-power AC contactor has many advantages such as non-power, but also there is such a shortcoming, i.e. without power reset disconnect function.Therefore, after power failure, controlled equipment will automatically start when power comes, thereby causing unsafe of staff and controlled equipment.The utility model is proposed to overcome this shortcoming.The technical scheme adopted is that, in existing non-power AC contactor, a power reset disconnect circuit is additionally arranged.The circuit is jointly constituted by start and reset button switch, AC-DC conversion circuit, capacitor and the like.When power failure occurs in work, press reset button switch, and contactor resets and disconnects, so that controlled equipment will not automatically start when power comes, thereby protecting safety of staff and controlled equipment when power comes, and further making the utility model fully meet practical requirements.

Description

Technical Field

[0001] This utility model relates to the field of AC contactor technology, and in particular to a resettable AC contactor that consumes no power. Background Technology

[0002] The existing non-power-consuming AC contactor, with application number 200920169607.7 and patent number CN201570451U, was designed and developed by me in 2009. While this contactor has many advantages, such as being noiseless, vibration-free, heat-free, long-lasting, and especially power-free, a problem has been discovered: in the event of a power outage, the main circuit of the contactor cannot reset and disconnect. Therefore, when power is restored, the contactor will automatically cause the controlled equipment to enter working mode, which could lead to safety hazards for workers and the scrapping of processed objects, thus hindering its widespread application. Utility Model Content

[0003] The purpose of this invention is to overcome the problem of non-power-consuming AC contactors failing to reset and disconnect during power outages. The technical solution is to add a power-off reset circuit to the existing non-power-consuming AC contactor. This power-off reset circuit consists of a start button switch, a reset button switch, an AC / DC converter circuit, and a capacitor. Its operation is as follows: When the start button switch is pressed, AC power is converted to DC power through the AC / DC converter circuit. This DC power simultaneously starts the contactor into normal operation and activates its self-locking device to lock it in place, maintaining its normal operation. At the same time, the capacitor is charged. When a power outage occurs, pressing the reset button switch discharges the previously charged energy from the capacitor to the contactor coil, activating the self-locking device to release it from the locked state, and the main circuit is reset and disconnected. This prevents the controlled equipment from automatically starting when power is restored, thus protecting the safety of personnel and the workpieces being processed. Experimental results demonstrate that this reset circuit, although simple, is effective and reliable. As can be seen from the above, by adding this reset circuit, this utility model not only retains the original advantages of the non-power-consuming AC contactor such as energy saving, but also has the special feature of safe operation, so that the non-power-consuming AC contactor fully meets the practical requirements of energy saving and safe operation, and thus can be better promoted and applied. Attached Figure Description

[0004] Figure 1 Existing non-power-consuming AC contactor outline drawing

[0005] Figure 2 Outer shape drawing of this utility model

[0006] Figure 3 Reset circuit schematic diagram

[0007] Figure 4 Physical diagram of electronic components in the reset circuit

[0008] Figure 5 Terminal block diagram

[0009] Figure 6 Wiring diagram of this utility model

[0010] In the diagram: 1. Existing non-power-consuming AC contactor; 2. This utility model AC contactor; 3. AC / DC conversion circuit; 4. Capacitor; 5. Terminal block; 6. Start button switch; 7. Reset button switch; 8. Wiring hole; 9. Wiring fastening screw; 10. Terminal block mounting hole; 11. Terminal block fastening screw. Detailed Implementation

[0011] The following is combined Figures 1 to 6 The specific embodiments of this utility model are described below.

[0012] from Figure 1 Figure 2 Figure 3 As can be seen, this utility model is composed of an existing non-power-consuming AC contactor and a newly added reset circuit. The specific implementation of the existing non-power-consuming AC contactor has been described in detail in the patent application specification of 2009, so it will not be repeated here. The specific implementation of the newly added reset circuit will be described in detail below. The reset circuit is composed of a start button switch (6), a reset button switch (7), an AC / DC power conversion circuit (3), and a capacitor (4). Among them, the start button switch (6) ①②, the AC / DC power conversion circuit (3) ③④, the reset button switch (7) ⑤⑥, the capacitor (4) ⑦⑧, the contactor (1) ⑨⑩, and the AC / DC power conversion circuit (3) AC power neutral wire N is connected in series, reset button switch (7)⑥ The two ends are connected in parallel between the capacitor (4) ⑦ and the contactor (1) ⑩. The AC / DC conversion circuit (3) is a bridge rectifier circuit, which is an integrated bridge rectifier. The bridge rectifier is installed outside the contactor (1), and the capacitor (4) is installed inside the contactor (1). They are integrated with the contactor (1) and connected to the external start button switch, reset button switch and input AC power supply through the terminal block (5).

[0013] To facilitate simple and aesthetically pleasing wiring, this utility model replaces the original two-terminal wiring of the coil of the existing non-power-consuming AC contactor (1) with a seven-terminal wiring bracket (5). The seven-terminal wiring bracket (5) is a cuboid with seven wiring holes (8) arranged from left to right on the top, labeled A, B, C, D, E, F, and G. Seven wiring fastening screws (9) are arranged from left to right on the front side. Mounting holes (10) and mounting screws (11) are also provided at both ends. The wiring bracket (5) is mounted on the lower front side of the contactor via the mounting holes (10) and fastening screws (11). The leads of each component are connected through the corresponding wiring holes on the top and tightened by the screws on the front side. For simple and quick wiring during use, the AC / DC conversion circuit (3) in the reset circuit, namely the bridge rectifier, capacitor (4), and the coil of the contactor (1), are already connected to the corresponding terminals of this wiring bracket. When in use, the start button switch (6) and reset button switch (7) can work normally as long as they are connected to the contactor according to the following requirements: Start button switch ①, AC power live wire (L) connected to terminal block G; start button switch ② connected to terminal block B; reset button switch ⑤ connected to terminal block A; reset button switch ⑥ connected to terminal block E; reset button switch 7... Connect to terminal block D (7-terminal). Connect the AC power neutral wire N to terminal block C (7-terminal). For the specific wiring method of the start button switch, reset button switch, and this utility model, see [link to relevant documentation]. Figure 6 .

Claims

1. A resettable, non-power-consuming AC contactor, characterized in that: It includes a reset disconnect circuit and a 7-terminal connector (5). The reset disconnect circuit includes a start button switch (6), a reset button switch (7), an AC / DC converter circuit (3), and a capacitor (4); wherein the start button switch (6) ①②, the AC / DC converter circuit (3) ③④, the reset button switch (7) ⑤⑥, the capacitor (4) ⑦⑧, the contactor (1) ⑨⑩, and the AC / DC converter circuit (3) AC power neutral wire N connected in series; reset button switch (7)⑥ The two ends are connected in parallel between the capacitor (4)⑦ and the contactor (1)⑩.

2. The resettable, non-power-consuming AC contactor according to claim 1, characterized in that: The AC / DC converter circuit (3) is a bridge rectifier circuit, which is an integrated bridge rectifier. The bridge rectifier is installed outside the contactor, and the capacitor (4) is installed inside the contactor. The two are integrated with the contactor (1) and connected to the external start button switch (6), reset button switch (7) and input AC power supply through the terminal block (5).

3. The resettable, non-power-consuming AC contactor according to claim 1, characterized in that: The 7-terminal terminal block (5) is a cuboid with 7 wiring holes (8) arranged from left to right on the top, namely A, B, C, D, E, F, and G. The front is provided with 7 corresponding wiring fastening screws (9) arranged from left to right. The two ends are provided with terminal block mounting holes (10) and terminal block fastening screws (11). The 7-terminal terminal block (5) is installed on the lower front of the contactor (1) through the terminal block mounting holes (10) and the terminal block fastening screws (11).

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