CN203166456U - Contactor integrating function and structure of electronic type protector - Google Patents

Abstract

The utility model relates to a contactor integrating the function and structure of an electronic protector, which includes a contactor contact arc extinguishing system, a contactor magnetic system, a contactor coil, a static contact bridge, a current sensor and an electronic protector. Two current sensors are set respectively on the three-phase static contact bridge of the contactor contact arc extinguishing system, and the electronic protector is installed on the contactor shell or any suitable part in the shell, and the electronic protector judges by the signal output by the current sensor In the working state of the load, when the circuit needs to be cut off, the coil circuit is turned off through the normally closed contact of the small relay, and the contactor breaks the main circuit. It has the characteristics of integrated electronic protector function of the contactor, unified structure, compactness and convenient production and application. , to realize the miniaturization of load control and protection appliances.

Description

A contactor integrating the function and structure of an electronic protector

technical field

The utility model relates to a contactor integrating the function and structure of an electronic protector, which belongs to the field of contactors.

Background technique

Contactors are control appliances, thermal relays and motor protectors are protective appliances. At present, all contactors and thermal relays or motor protectors in magnetic starter products combined with contactors and thermal relays or motor protectors are installed independently. At present, a large number of magnetic starters combined with a contactor and a thermal relay are used. This kind of electrical contactor and thermal relay are installed independently, and the shell forms a large electrical appliance. Due to the protection characteristics of the thermal relay and the thermal characteristics of the motor The current sensors of various motor protectors currently used are installed in the protector, and the size of the protector is obviously large, and the protector and The contactors are installed independently, which also causes problems of large installation area and volume.

For this reason, the utility model proposes to install the electronic protection and the contactor body as a structural integration, and the current sensor is installed on the static contact bridge of the main circuit of the contactor. It is clear at a glance on the contactor, forming a contactor with protector function, which has the characteristics of contactor integrated electronic protector function, unified structure, compact and convenient production and application, and realizes the miniaturization of load control and protection appliances.

Contents of the invention

The purpose of this utility model is to provide a contactor that integrates the function and structure of the electronic protector. The contactor integrates the electronic protector and the contactor body into a structurally integrated installation. On the static contact bridge, the electronic protector is installed on the contactor housing or any suitable part in the housing to form a contactor with protector function. The single-chip microcomputer control system in the electronic protector detects the output signals of the three current sensors. When it is judged that a fault occurs and the load is overheated, the single-chip microcomputer control system shuts off the coil circuit through the normally closed contacts of the small and medium-sized relays of the electronic protector, and the contactor breaks the main circuit to ensure the safe operation of the load and the circuit. The features of integrated protector function, uniform structure, compactness and convenient production and application realize the miniaturization of load control and protection appliances.

The purpose of this utility model is achieved in that it includes a contactor contact arc extinguishing system, a contactor magnetic system, a contactor coil, a static contact bridge, a current sensor and an electronic protector; it is characterized in that: the current sensor sleeve On the static contact bridge of the contactor arc extinguishing system, the output end of the current sensor is connected to the single-chip microcomputer control system in the electronic protector; the two ends of the power supply are connected to the two input ends of the power supply in the electronic protector connected, the first and second output terminals of the power supply in the electronic protector are respectively connected to the power input terminals of the single-chip microcomputer control system in the electronic protector, and the first terminal of the power supply is connected to the small One end of the normally closed contact of the relay, the other end of the normally closed contact of the small relay is connected to one end of the contactor coil in the contactor magnetic system, the second end of the power supply is connected to the other end of the contactor coil, and the electronic The type protector is set on the housing of the contactor.

In an embodiment of the present invention, the current sensor includes a first current sensor, a second current sensor and a third current sensor; On the static contact bridge, the two output terminals of the first current sensor are connected to the third A/D port and the fourth A/D port of the single-chip microcomputer control system in the electronic protector, and the two output terminals of the second current sensor are connected to To the fifth A/D port and the sixth A/D port of the single-chip microcomputer control system in the electronic protector, the two output terminals of the third current sensor are connected to the seventh A/D port of the single-chip microcomputer control system in the electronic protector With the eighth A/D port.

In an embodiment of the present utility model, the electronic protector is arranged inside the housing of the contactor.

In an embodiment of the utility model, the current sensor includes a first current sensor and a second current sensor, and the first and second current sensors are respectively set on any two-phase static contact bridge of the contact arc extinguishing system of the contactor .

In an embodiment of the present invention, the power supply in the electronic protector is a non-isolated power supply.

In one embodiment of the present invention, the two input ends of the power supply in the electronic protector are respectively connected to one end of the power supply and a tap of the coil, and the two output ends of the power supply in the electronic protector are respectively connected to the electronic The power input terminal of the single-chip microcomputer control system in the type protector is connected.

In an embodiment of the utility model, the small relay is a power electronic switching device.

Compared with the prior art, the utility model integrates the electronic protection and the contactor body into a structurally integrated installation to form a contactor with a protector function. The single-chip microcomputer control system in the electronic protector detects the output signal of the current sensor. When it is judged that a fault occurs and the load is overheated, the single-chip microcomputer control system turns off the coil circuit through the normally closed contact of the small and medium-sized relay of the electronic protector, and the contactor breaks the main circuit to ensure the safe operation of the load and the circuit. The protector has the characteristics of unified function, structure, compactness and convenient production and application, and realizes the miniaturization of load control and protection appliances. the

Description of drawings

FIG. 1A is a schematic circuit diagram of Embodiment 1 of the present invention.

Fig. 1B is a schematic right view of Embodiment 1 of the present utility model.

FIG. 2A is a schematic circuit diagram of Embodiment 2 of the present invention.

Fig. 2B is a schematic view of the right side of the second embodiment of the utility model.

FIG. 3A is a schematic circuit diagram of Embodiment 3 of the present invention.

Fig. 3B is a schematic right view of Embodiment 3 of the present utility model.

FIG. 4A is a schematic circuit diagram of Embodiment 4 of the present invention.

Fig. 4B is a schematic right view of Embodiment 4 of the present utility model.

Fig. 5 is a schematic circuit diagram of a non-isolated control power supply for a contactor according to Embodiment 5 of the present invention.

Fig. 6 is a schematic circuit diagram of the built-in control power supply of the contactor according to the sixth embodiment of the present invention.

Fig. 7 is a schematic circuit diagram of the power electronic switching device of the single-chip microcomputer control system in the electronic contactor protector of the seventh embodiment of the present utility model.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

As shown in Figure 1A, a contactor that integrates the function and structure of an electronic protector includes a contactor contact arc extinguishing system A, a contactor magnetic system B, a contactor coil C, a static contact bridge H, a current sensor D and Electronic protector G; it is characterized in that: the current sensor D is set on the static contact bridge H of the contact arc extinguishing system A of the contactor, and the output terminal of the current sensor D is connected with the single-chip microcomputer control system in the electronic protector G F connection; the two ends of the power supply U are connected to the two input ends of the power supply E in the electronic protector G, and the first and second output ends of the power supply E in the electronic protector G are respectively connected to the single-chip microcomputer in the electronic protector G The power input ends of the control system F are connected, the first end of the power supply U is connected to one end of the normally closed contact K of the small relay of the single-chip microcomputer control system F in the electronic protector G, and the normally closed contact K of the small relay is The other end is connected to one end of the contactor coil C in the contactor magnetic system B, the second end of the power supply U is connected to the other end of the contactor coil C, and the electronic protector G is provided with the housing M of the contactor superior.

It should be noted that the current sensor D in this embodiment may include a first current sensor D1, a second current sensor D2 and a third current sensor D3; however, the current sensor is not limited thereto, it may also be two . The contactor integrates the electronic protection with the contactor body. Please refer to Figure 1B. In the figure, the first, second and third current sensors are respectively set on the three-phase static contact bridge of the contact arc extinguishing system A of the contactor. On H, the two output terminals of the first current sensor D1 are connected to the third A/D port and the fourth A/D port of the single-chip microcomputer control system F in the electronic protector G, and the two output terminals of the second current sensor D2 Connect to the fifth A/D port and the sixth A/D port of the single-chip microcomputer control system F in the electronic protector G, and connect the two output terminals of the third current sensor D3 to the Fth of the single-chip microcomputer control system F in the electronic protector G The seventh A/D port and the eighth A/D port. In this embodiment, the three current sensors are respectively set on the three-phase static contact bridge of the contactor contact arc extinguishing system, and the electronic protector is installed on any suitable part of the contactor shell to form a contactor with protector function. The single-chip microcomputer control system in the electronic protector detects the output signals of the three current sensors. When it is judged that a fault occurs and the load is overheated, the single-chip microcomputer control system turns off the coil circuit through the normally closed contact of the small relay in the electronic protector. The contactor Cut off the main circuit to ensure the safe operation of the load and the circuit.

As shown in Figures 2A and 2B, a contactor integrating the function and structure of an electronic protector differs from Embodiment 1 only in that the electronic protector is installed at any suitable position in the contactor housing.

As shown in Figures 3A and 3B, a contactor that integrates the function and structure of an electronic protector includes a contactor contact arc extinguishing system A, a contactor magnetic system B, a contactor coil C, a static contact bridge H, and a current sensor D and electronic protector G;

It is characterized in that: the current sensor D1 and the current sensor D2 are respectively set on any two-phase static contact bridge H of the contactor contact arc extinguishing system A, and the two output terminals of the current sensor D1 are connected to the electronic protector G for single-chip control The third A/D port 3 and the fourth A/D port 4 of the system F, and the two output terminals of the current sensor D2 are connected to the fifth A/D port 5 and the sixth A/D port 5 of the single-chip microcomputer control system F in the electronic protector G A/D port 6, the two ends of the power supply U are connected to the two input ends of the power supply E in the electronic protector G, and the two output ends of the power supply E in the electronic protector G are connected to the electronic protector G respectively. The power input terminals 1 and 2 of the single-chip microcomputer control system F are connected, and one end of the power supply U is connected to one end 10 of the normally closed contact K of the small relay of the single-chip microcomputer control system F in the electronic protector G, and the normally closed contact of the small relay is The other end 9 of the contact K is connected to one end of the contactor coil C in the contactor magnetic system B, the other end of the power supply U is connected to the other end of the contactor coil C, and the electronic protector G is installed on the contactor housing M any suitable location.

The contactor integrates the electronic protection with the contactor body, and the two current sensors are respectively set on any two-phase static contact bridge of the contactor arc extinguishing system, and the electronic protector is installed on the contactor shell. Any suitable part on the top to form a contactor with a protector function. The single-chip control system in the electronic protector detects the output signals of the two current sensors. When it is judged that a fault occurs and the load is overheated, the single-chip control system passes through the electronic protector. The normally closed contact of the small relay turns off the coil circuit, and the contactor turns off the main circuit to ensure the safe operation of the load and the circuit.

As shown in Figures 4A and 4B, a contactor integrating the function and structure of an electronic protector differs from Embodiment 3 only in that the electronic protector is installed at any suitable position in the contactor housing.

As shown in Figure 5, the power supply E in the electronic protector G of a contactor integrating the function and structure of the electronic protector, the two terminals of the power supply U are in phase with the two input terminals of the power supply E in the electronic protector G The two output terminals of the power supply E in the electronic protector G are respectively connected to the power supply input terminals 1 and 2 of the single-chip microcomputer control system F in the electronic protector G, and the power supply E in the electronic protector G is a non-isolated power supply.

As shown in Figure 6, a power supply E in the electronic protector G of a contactor integrating the function and structure of the electronic protector, the two input terminals of the power supply E in the electronic protector G are respectively connected to one end of the power supply U With a tap of the coil, the two output terminals of the power supply E in the electronic protector G are respectively connected with the power supply input terminals 1 and 2 of the single-chip control system F in the electronic protector G, and the power supply E in the electronic protector G The energy comes from part of the coil in the contactor coil, and there is no step-down link in the control power supply E, which belongs to the built-in power supply of the contactor.

As shown in Figure 7, a contactor integrating the function and structure of an electronic protector is a power electronic switch device K in a single-chip microcomputer control system F in an electronic protector G, and one end of the power supply U is connected to the electronic protector (G) One end 10 of the power electronic switching device K of the single-chip microcomputer control system F, the other end 9 of the power electronic switching device K is connected to one end of the contactor coil C in the contactor magnetic system B, and the other end of the power supply U is connected to the contactor The other ends of the coil C are connected.

When the contactor coil is required to be energized, the single-chip control system controls the power electronic switching device to be turned on. When it is judged that a fault occurs and the load is overheated, the single-chip control system turns off the coil circuit through the power electronic switching device in the electronic protector, and the contactor is disconnected. The main circuit ensures the safe operation of the load and the circuit.

The above are the preferred embodiments of the utility model, and all changes made according to the technical solution of the utility model, when the functional effect produced does not exceed the scope of the technical solution of the utility model, all belong to the protection scope of the utility model. the

Claims (7)

1. A contactor integrating the function and structure of an electronic protector, including a contactor contact arc extinguishing system (A), a contactor magnetic system (B), a contactor coil (C), a static contact bridge (H), Current sensor (D) and electronic protector (G); It is characterized in that: the current sensor (D) is set on the static contact bridge (H) of the contactor contact arc extinguishing system (A), and the output terminal of the current sensor (D) is connected with the electronic protector (G) The single-chip microcomputer control system (F) is connected; the two terminals of the power supply (U) are connected with the two input terminals of the power supply (E) of the electronic protector (G), and the power supply (E) of the electronic protector (G) The first and second output terminals of the electronic protector (G) are respectively connected to the power input terminals of the single-chip microcomputer control system (F), and the first terminal of the power supply (U) is connected to the single-chip microcomputer in the electronic protector (G). One end of the normally closed contact (K) of the small relay of the control system (F), the other end of the normally closed contact (K) of the small relay is connected with one end of the contactor coil (C) in the contactor magnetic system (B) connected, the second end of the power supply (U) is connected to the other end of the contactor coil (C), and the electronic protector (G) is set on the housing (M) of the contactor. 2. The contactor with integrated electronic protector function and structure according to claim 1, characterized in that: the current sensor (D) includes a first current sensor (D1), a second current sensor (D2) and a second current sensor (D2) Three current sensors (D3); the first, second and third current sensors are respectively set on the three-phase static contact bridge (H) of the contactor contact arc extinguishing system (A), and the two current sensors of the first current sensor (D1) The output terminal is connected to the third A/D port and the fourth A/D port of the single-chip control system (F) in the electronic protector (G), and the two output terminals of the second current sensor (D2) are connected to the electronic protector The fifth A/D port and the sixth A/D port of the single-chip microcomputer control system (F) in the device (G), the two output terminals of the third current sensor (D3) are connected to the single-chip microcomputer control in the electronic protector (G) System (F) seventh A/D port and eighth A/D port. 3. The contactor integrating the function and structure of the electronic protector according to claim 1, characterized in that: the electronic protector (G) is arranged inside the housing (M) of the contactor. 4. The contactor with integrated electronic protector function and structure according to claim 1 or 3, characterized in that: said current sensor (D) includes a first current sensor and a second current sensor, the first, The two current sensors are set respectively on any two-phase static contact bridge of the contact arc extinguishing system of the contactor. 5. The contactor integrating the function and structure of an electronic protector according to any one of claims 1 to 3, characterized in that: the power supply (E) in the electronic protector (G) is a non-isolated power supply. 6. The contactor integrating the function and structure of the electronic protector according to claim 5, characterized in that: the two input terminals of the power supply (E) in the electronic protector (G) are respectively connected to the power supply One end of (U) is connected to a tap of the coil, and the two output terminals of the power supply (E) in the electronic protector (G) are respectively connected to the power input terminals of the single-chip control system (F) in the electronic protector (G). . 7. The contactor integrating the function and structure of an electronic protector according to claim 1, wherein the small relay is a power electronic switching device.

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