Alternating current contactor and electrical equipment
By adopting a single coil design and the current control of independent power supply circuits in the AC contactor, the problems of unretaining the dynamic core and complex process are solved, and cost reduction and reliability improvement are achieved.
Patent Information
- Application Number
- CN202422204947.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-09-09
AI Technical Summary
The existing energy-saving AC contactors have problems such as the dynamic core cannot be retained and malfunctioning, and the double coil process is complicated and winding is difficult.
It adopts a single coil design, through the independent power supply circuit of the start circuit and the holding circuit, the switching of current is controlled by the position switch, high voltage and high current during startup, low voltage and low current during maintenance, and a coil is used to achieve the pull-in and hold function.
The process flow is simplified, the use of electromagnet windings is reduced, the cost and energy consumption is reduced, the product reliability is improved, and the risk of double coil failure is reduced.
Smart Images
Figure CN223066083U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of circuit technologies, and particularly to an AC contactor and an electrical device. Background Art
[0002] Currently, energy-saving AC contactors generally adopt double-coil control for suction and disconnection, AC suction, and DC holding. Due to the failure to handle the connection problem well, there are always problems such as the moving iron core not being able to hold and misoperation. The double-coil process is complex. Some need to make taps, and some have different wire diameters, making winding difficult. Summary of the Invention
[0003] Based on this, in view of the above technical problems, it is necessary to provide an AC contactor and an electrical device that can simplify the process and reduce the electromagnet winding.
[0004] In a first aspect, this application provides an AC contactor, which includes:
[0005] A coil module;
[0006] A starting circuit, including a position switch, and two output terminals of the starting circuit are respectively connected to two ends of the coil module;
[0007] A holding circuit, two output terminals of the holding circuit are respectively connected to two ends of the coil module; wherein the coil of the coil module is both the suction coil of the starting circuit and the holding coil of the holding circuit;
[0008] When the position switch is closed, the starting circuit outputs a starting current to the coil module; when the position switch is open, the holding circuit outputs a holding current to the coil module, and the starting current is greater than the holding current.
[0009] In one embodiment, the starting circuit further includes:
[0010] A first rectification circuit, a first end of the first rectification circuit is connected to a second end of the position switch, a first end of the position switch is connected to a first end of a control power supply, a second end of the first rectification circuit is connected to a second end of the control power supply, and a third end and a fourth end of the first rectification circuit are respectively two output terminals of the starting circuit;
[0011] The first rectification circuit is used to rectify the control power supply and input it to the coil module to provide a starting current for the coil module. Under the action of the starting current, the moving iron core of the AC contactor moves towards the static iron core of the AC contactor.
[0012] In one embodiment, the holding circuit includes:
[0013] An adjustment module, with two input ends of the adjustment module respectively connected to the first end and the second end of a control power supply;
[0014] A second rectification circuit, with the first end and the second end of the second rectification circuit respectively connected to the two output ends of the adjustment module, and the third end and the fourth end of the second rectification circuit being the two output ends of the holding circuit respectively;
[0015] The adjustment module is used to reduce the voltage and / or current of the control power supply and output the reduced voltage and / or current to the second rectification circuit, and the second rectification circuit is used to rectify the reduced voltage and / or current and then input it to the coil module to provide a holding current for the coil module.
[0016] In one embodiment, the holding circuit further includes:
[0017] A filtering and anti - power - fluctuation module, with two ends of the filtering and anti - power - fluctuation module respectively connected to the third end and the fourth end of the second rectification circuit.
[0018] In one embodiment, the filtering and anti - power - fluctuation module is a capacitor.
[0019] In one embodiment, the adjustment module is a transformer or a current converter.
[0020] In one embodiment, the coil module further includes:
[0021] A diode, with the first end of the diode connected to the first output end of the holding circuit and the second end of the diode connected to one end of the coil module.
[0022] In one embodiment, the coil winding of the coil module satisfies the attraction force when the moving iron core and the static iron core of the AC contactor are attracted, and satisfies the holding force of the AC contactor under the holding current.
[0023] In one embodiment, the AC contactor further includes: a varistor, with two ends of the varistor respectively connected to the two ends of the control power supply.
[0024] In a second aspect, the present application further provides an electrical device including the above - mentioned AC contactor.
[0025] For the above AC contactor and electrical equipment, the coil serves as both the pulling-in coil of the starting circuit and the holding coil of the holding circuit, and two power supply circuits, namely the starting circuit and the holding circuit, are provided. When the position switch is closed, the starting circuit outputs a starting current to the coil; when the position switch is open, the holding circuit outputs a holding current to the coil, and the starting current is greater than the holding current. In this way, high voltage and large current are applied during starting, while low voltage and small current are applied during holding. As a result, the electromagnet coil can be optimized separately in design, and the electromagnet winding is about half of the original traditional winding. This not only simplifies the process but also greatly saves the consumption of raw materials, significantly reduces the cost, greatly reduces the active power consumption of the winding, and at the same time reduces the risk of double-coil failure, improving the reliability of the product. Description of the Drawings
[0026] Figure 1 It is the circuit diagram of the AC contactor in an embodiment;
[0027] Figure 2 It is the schematic diagram of the AC contactor in an embodiment. Description of the Drawings:
[0029] 100 Starting circuit, 101 Holding circuit, 200 Coil module, BRIGE1 First rectifying circuit, BRIGE2 Second rectifying circuit, KF Position switch, K1 Coil, D1 Diode, R1 Varistor, C1 Capacitor, ⑥ Moving iron core ⑥, ⑦ Static iron core, ⑧ Return spring, ⑨ Normally open contact, ⑩ Trigger head. Detailed Embodiment
[0030] To make the above objects, features, and advantages of the present utility model more apparent and understandable, the following describes the detailed embodiment of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.
[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0033] In the present utility model, unless otherwise clearly specified and limited, terms such as "mounted", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0034] In the present utility model, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0035] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.
[0036] Please refer to Figure 1 and Figure 2 as shown, where Figure 1 is the circuit diagram of an AC contactor in an embodiment; Figure 2 is the schematic diagram of an AC contactor in an embodiment. The present application provides an AC contactor, which includes a starting circuit 100, a holding circuit 101 and a coil module 200;
[0037] Among them, the starting circuit 100 includes a position switch KF, and the two output terminals of the starting circuit 100 are respectively connected to the two ends of the coil module 200; the two output terminals of the holding circuit 101 are respectively connected to the two ends of the coil module 200; where the coil K1 of the coil module 200 is both the pulling-in coil of the starting circuit 100 and the holding coil of the holding circuit 101;
[0038] When the position switch KF is closed, the starting circuit 100 outputs a starting current to the coil module 200; when the position switch KF is opened, the holding circuit 101 outputs a holding current to the coil module 200, and the starting current is greater than the holding current.
[0039] Specifically, after the control power supply is connected, the entire circuit is powered on and operates normally. The starting circuit 100 provides high voltage for the pulling-in coil, and a large starting current flows through the pulling-in coil. The moving iron core ⑥ also moves towards the static iron core ⑦ under the action of the electromagnetic attraction generated by the pulling-in coil; when the moving iron core ⑥ runs close to the static iron core ⑦, the position switch KF is opened. At this time, the holding circuit 101 provides a holding current for the holding coil to keep the contactor in the pulled-in state.
[0040] In order to simplify the process, the pulling-in coil and the holding coil in the present application are the same coil K1, that is, the pulling-in coil and the holding coil share a coil K1. There is only one electromagnet coil K1, and the winding not only has sufficient attraction when pulling in, but also can achieve extremely low energy consumption on the premise that the holding force meets the reliability.
[0041] Two independent power supply circuits, a starting circuit 100 and a holding circuit 101 are provided. The starting current of the starting circuit 100 is greater than the holding current of the holding circuit 101, that is, the starting current at startup is high voltage and large current, and the holding current during holding is low voltage and small current. Thus, the electromagnet coil K1 can be optimized separately. The electromagnet winding is about half of the original traditional winding, which not only simplifies the process, but also greatly saves the amount of raw materials, significantly reduces the cost, and the active power consumption of the winding is also greatly reduced. At the same time, the risk of failure of the double coil K1 is reduced, and the reliability of the product is improved.
[0042] Moreover, high voltage is used at startup to increase the starting current and improve the starting attraction. Low voltage and small current are used during holding. The starting state is reliably and smoothly switched to the holding state through the position switch KF, meeting the extremely low energy consumption index of the energy-saving contactor.
[0043] In one optional embodiment, the starting circuit 100 further includes: a first rectifying circuit BRIGE1. The first end of the first rectifying circuit BRIGE1 is connected to the second end of the position switch KF. The first end of the position switch KF is connected to the first end of the control power supply. The second end of the first rectifying circuit is connected to the second end of the control power supply. And the third end and the fourth end of the first rectifying circuit are respectively the two output ends of the starting circuit 100. The first rectifying circuit BRIGE1 is used to rectify the control power supply and input it to the coil module 200 to provide a starting current for the coil module 200. Under the action of the starting current, the moving iron core ⑥ of the AC contactor moves towards the static iron core ⑦ of the AC contactor.
[0044] In the present application, the starting circuit 100 further includes a first rectifying circuit BRIGE1. After the position switch KF is closed, the starting circuit 100 provides high voltage for the coil K1 of the moving iron core ⑥, and a large starting current flows through the coil K1. The moving iron core ⑥ moves towards the static iron core ⑦ under the action of the electromagnetic attraction generated by the coil K1.
[0045] In one optional embodiment, the holding circuit 101 includes an adjustment module and a second rectifying circuit BRIGE2. The two input ends of the adjustment module are respectively connected to the first end and the second end of the control power supply. The first end and the second end of the second rectifying circuit BRIGE2 are respectively connected to the two output ends of the adjustment module. The third end and the fourth end of the second rectifying circuit BRIGE2 are respectively the two output ends of the holding circuit 101.
[0046] The adjustment module is used to reduce the voltage and / or current of the control power supply, and output the reduced voltage and / or current to the second rectifier circuit BRIGE2. The second rectifier circuit BRIGE2 is used to rectify the reduced voltage and / or current and then input it to the coil module 200 to provide a holding current for the coil module 200.
[0047] Specifically, when the moving iron core ⑥ runs to the position switch KF, the position switch KF is opened. At this time, in the holding circuit 101, after passing through the adjustment module, it is converted into a low voltage and small current, and then rectified by the second rectifier circuit BRIGE2 to provide a holding current for the electromagnet coil K1, so that the contactor remains in the closed state.
[0048] In this way, the AC contactor has only one electromagnet coil K1. The winding not only has sufficient attraction when attracting, but also can achieve extremely low energy consumption on the premise that the holding force meets the reliability.
[0049] In one alternative embodiment, the adjustment module is a transformer or a current converter. In this way, the transformer (current converter) converts the holding circuit 101 from a high voltage to a low voltage and small current.
[0050] Among them, a transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Its main functions include voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc.
[0051] A transformer includes an iron core (or magnetic core) and coils. The coils have two or more windings. Among them, the winding connected to the AC power supply is called the primary coil (primary side coil, original coil), and the remaining windings are called secondary coils (secondary side coils, secondary coils). The simplest iron core transformer is composed of an iron core made of a soft magnetic material and primary and secondary coils with different numbers of turns wound around the iron core. When the primary coil of the transformer is connected to the AC power supply, an alternating magnetic flux is generated in the iron core, and an alternating current is induced in the secondary coil.
[0052] In one alternative embodiment, the holding circuit 101 further includes: a filtering and anti - voltage - sag module, and both ends of the filtering and anti - voltage - sag module are respectively connected to the third end and the fourth end of the second rectifier circuit BRIGE2.
[0053] In one alternative embodiment, the filtering and anti - voltage - sag module is a capacitor C1.
[0054] Among them, in this embodiment, after the holding circuit 101 is converted to a low voltage by the transformer, the subsequent filtering and anti - voltage - sag modules also drop to a low voltage. The volume of the capacitor C1 decreases, the service life increases, and the cost is also reduced.
[0055] In addition, it should be noted that the first rectifier circuit BRIGE1 and the second rectifier circuit BRIGE2 involved in the present application may be bridge rectifier circuits, and the bridge rectifier circuit includes 4 diodes D1 connected end to end.
[0056] In one optional embodiment, the coil module 200 further includes: a diode D1, a first end of the diode D1 is connected to a first output end of the holding circuit 101, and a second end of the diode D1 is connected to one end of the coil module 200.
[0057] In one optional embodiment, the coil K1 winding of the coil module 200 satisfies the attraction force when the moving iron core ⑥ and the static iron core ⑦ of the AC contactor are attracted, and satisfies the holding force of the AC contactor under the holding current.
[0058] In one optional embodiment, the AC contactor further includes: a varistor R1, and two ends of the varistor are respectively connected to two ends of the control power supply.
[0059] Among them, for the convenience of understanding, in combination with Figure 1 As shown, the AC contactor of the present invention includes a starting circuit 100, a holding circuit 101, and a coil module 200; wherein the starting circuit 100 and the holding circuit 101 are two independent circuits.
[0060] The starting circuit 100 includes: a position switch KF, a first rectifier circuit BRIGE1; the holding circuit 101 includes: a transformer (rectifier), a second rectifier circuit BRIGE2, and a filter and anti-surge capacitor C1; the coil module 200 includes: a coil K1, a diode D1, and a moving and static iron core ⑦.
[0061] After the access control power supply is connected, the AC contactor is energized and operates normally. The starting circuit 100 provides high voltage for the coil K1. A relatively large starting current flows through the coil K1, and the moving iron core ⑥ also moves towards the static iron core ⑦ under the action of the electromagnetic attraction generated by the coil K1. The trigger head ⑩ moves along with the moving iron core ⑥. When the moving iron core ⑥ runs close to the static iron core ⑦, the trigger head ⑩ opens the position switch KF. At this time, in the holding circuit 101, after being transformed (rectified) by the transformer, it becomes a low-voltage and small-current, and then after being rectified by the second rectifier circuit BRIGE2, it provides a holding current for the coil K1 to keep the contactor in the suction state. In the present utility model, the suction coil and the holding coil share a coil K1, and two independent power supply circuits are set. It has high voltage and large current during startup and low voltage and small current during holding. Thus, the electromagnet coil K1 can be optimized separately, and the electromagnet winding is about half of the original traditional winding. This not only simplifies the process, but also greatly saves the consumption of raw materials, greatly reduces the cost, significantly reduces the active power consumption of the winding, and also reduces the risk of failure of the double coil K1, improving the reliability of the product. When the subsequent reset spring ⑧ resets, it pulls the moving iron core ⑥ away from the static iron core ⑦, so that the normally open contact ⑨ is in the open state.
[0062] In one optional embodiment, the present application further provides an electrical device including the AC contactor described in any of the above embodiments.
[0063] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as within the scope described in this specification.
[0064] The above-described embodiments merely represent several implementation manners of the present utility model, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.
Claims
1. An AC contactor, characterized in that, The AC contactor includes: A coil module; A starting circuit including a position switch, and two output terminals of the starting circuit are respectively connected to two ends of the coil module; A holding circuit, and two output terminals of the holding circuit are respectively connected to two ends of the coil module; wherein the coil of the coil module is both the attracting coil of the starting circuit and the holding coil of the holding circuit; When the position switch is closed, the starting circuit outputs a starting current to the coil module; when the position switch is open, the holding circuit outputs a holding current to the coil module, and the starting current is greater than the holding current.
2. The AC contactor according to claim 1, characterized in that, The starting circuit further includes: A first rectifying circuit, a first end of the first rectifying circuit is connected to a second end of the position switch, a first end of the position switch is connected to a first end of a control power supply, a second end of the first rectifying circuit is connected to a second end of the control power supply, and a third end and a fourth end of the first rectifying circuit are respectively two output terminals of the starting circuit; The first rectifying circuit is used to rectify the control power supply and input it to the coil module to provide a starting current for the coil module, and under the action of the starting current, the moving iron core of the AC contactor moves towards the static iron core of the AC contactor.
3. The AC contactor according to claim 1, characterized in that, The holding circuit includes: An adjustment module, and two input terminals of the adjustment module are respectively connected to a first end and a second end of a control power supply; A second rectifying circuit, a first end and a second end of the second rectifying circuit are respectively connected to two output terminals of the adjustment module, and a third end and a fourth end of the second rectifying circuit are respectively two output terminals of the holding circuit; The adjustment module is used to reduce the voltage and / or current of the control power supply and output the reduced voltage and / or current to the second rectifying circuit, and the second rectifying circuit is used to rectify the reduced voltage and / or current and input it to the coil module to provide a holding current for the coil module.
4. The AC contactor according to claim 3, characterized in that, The holding circuit further includes: A filtering and anti - power - flicker module, and two ends of the filtering and anti - power - flicker module are respectively connected to a third end and a fourth end of the second rectifying circuit.
5. The AC contactor according to claim 4, characterized in that, The filtering and anti - power - flicker module is a capacitor.
6. The AC contactor according to claim 3, characterized in that, The adjustment module is a transformer or a current converter.
7. The AC contactor according to any one of claims 1 to 6, characterized in that, The coil module further includes: A diode, a first end of the diode is connected to a first output terminal of the holding circuit, and a second end of the diode is connected to one end of the coil module.
8. The AC contactor according to any one of claims 1 to 6, characterized in that, The coil winding of the coil module meets the attraction force when the moving iron core and the static iron core of the AC contactor are attracted, and meets the holding force of the AC contactor under the holding current.
9. The AC contactor according to any one of claims 1 to 6, characterized in that, The AC contactor further includes: a varistor, and two ends of the varistor are respectively connected to two ends of a control power supply.
10. An electrical device, characterized in that, An AC contactor according to any one of claims 1 to 9.