CN110164719B - Switching device, method and apparatus for preventing contact adhesion in switching device - Google Patents
Switching device, method and apparatus for preventing contact adhesion in switching device Download PDFInfo
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- CN110164719B CN110164719B CN201910479975.XA CN201910479975A CN110164719B CN 110164719 B CN110164719 B CN 110164719B CN 201910479975 A CN201910479975 A CN 201910479975A CN 110164719 B CN110164719 B CN 110164719B
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- 230000003068 static effect Effects 0.000 claims abstract description 49
- 230000008859 change Effects 0.000 claims description 15
- 230000001846 repelling effect Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 238000004590 computer program Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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- 239000000463 material Substances 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
- H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
- H01H2001/545—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force having permanent magnets directly associated with the contacts
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Abstract
The invention relates to a switch device, a method and equipment for preventing contacts in the switch device from being adhered, wherein the switch device comprises a switch main body, a moving contact and a static contact matched with the moving contact; the moving contact and the static contact are arranged on the switch main body; the moving contact is provided with a first magnet, and the static contact is provided with a second magnet; the switch main body is connected with the safety monitor; if the moving contact is contacted with the fixed contact, the switching device enters a conducting state; the safety monitor acquires the current flowing through the switch main body, if the current of the switch main body is judged to be larger than a preset current threshold value, the polarity of the first magnet or the polarity of the second magnet is changed, so that the polarity of the first magnet is the same as that of the second magnet, repulsive force is generated between the first magnet and the second magnet, the moving contact and the static contact are separated under the repulsive force, the moving contact and the static contact are prevented from being adhered, normal work of electrical equipment is prevented from being influenced, even the electrical equipment is prevented from being damaged, and the safety of the electrical equipment is improved.
Description
Technical Field
The invention relates to the technical field of switch protection, in particular to a switch device, and a method and equipment for preventing contacts in the switch device from being adhered.
Background
With the development of science and technology, electrical equipment such as air conditioners, water heaters and the like become indispensable parts in the life of people.
In the electrical equipment in the prior art, switching devices such as a contactor and a relay are generally arranged on circuits such as a main circuit and a protection circuit to control the operation of the electrical equipment and protect the electrical equipment.
However, the contact of the switching device is frequently broken down by transient over-current to cause the contact to be adhered, so that the contact of the switching device cannot be reset, the phenomena of incapability of protecting electrical equipment, incapability of normally controlling and protecting the operation of the electrical equipment and the like occur, the normal work of the electrical equipment is influenced, and even the electrical equipment is damaged, and the safety of the electrical equipment is low.
Disclosure of Invention
In view of this, the present invention provides a switching device, and a method and an apparatus for preventing contacts in the switching device from being adhered, so as to solve the problem in the prior art that when the contacts of the switching device are easily broken down by a large current, normal operation of electrical equipment is affected, and even the electrical equipment is damaged, so that the safety of the electrical equipment is low.
To achieve the above object, the present invention provides a switching device,
the switch comprises a switch main body, a moving contact and a static contact matched with the moving contact;
the moving contact is provided with a first magnet, the static contact is provided with a second magnet, and the polarity of the first magnet is opposite to that of the second magnet;
the moving contact and the static contact are arranged on the switch main body;
if the moving contact is contacted with the fixed contact, the switching device enters a conducting state;
the switch main body is used for being connected with a safety monitor, and when the current of the switch main body is larger than a preset current threshold value, the polarity of the first magnet or the polarity of the second magnet is adjusted to be the same by the safety monitor, so that the moving contact and the static contact are separated by repulsion of the same polarity.
Further, in the above switching device, the switch main body is provided with a first line connected to the movable contact;
the first circuit is used for being connected with the safety monitor, and the switching of the current direction of the first circuit is controlled by the safety monitor to change the polarity of the first magnet.
Further, in the above switch device, the switch main body is provided with a second line connected to the fixed contact;
and the second line is used for being connected with the safety monitor, and the switching of the current direction of the second line is controlled by the safety monitor to change the polarity of the second magnet.
Further, in the above-described switching device, the switching device includes a contactor.
The invention also provides a method for preventing the contact in the switch device from being adhered, which comprises the following steps:
obtaining a current flowing through the switch body;
judging whether the current of the switch main body is larger than a preset current threshold value or not;
if the current of the switch main body is larger than a preset current threshold value, the polarity of the first magnet or the polarity of the second magnet is changed, so that the polarity of the first magnet is the same as that of the second magnet, and the moving contact and the fixed contact are separated by repelling the same polarity.
Further, the method described above further includes:
if the current of the switch main body is larger than a preset current threshold value, generating fault information;
and sending the fault information to an upper computer.
Further, in the above method, before generating the fault information, the method further includes:
counting the number of changes in changing the polarity of the first magnet or the polarity of the second magnet;
correspondingly, the generating the fault information includes:
and if the change times reach a preset time threshold value, generating the fault information.
The present invention also provides a device for preventing the contact in the above-mentioned switching device from being stuck, including:
the acquisition module is used for acquiring current flowing through the switch main body;
the judging module is used for judging whether the current of the switch main body is larger than a preset current threshold value or not;
and the control module is used for changing the polarity of the first magnet or the polarity of the second magnet if the current of the switch main body is larger than a preset current threshold value, so that the polarity of the first magnet is the same as that of the second magnet, and the moving contact and the fixed contact are separated by repelling the same polarity.
The invention also provides a safety monitor for preventing the contact adhesion in the switch device, which is characterized by comprising a memory and a processor;
the processor and the memory are connected through a communication bus:
the processor is used for calling and executing the program stored in the memory;
the memory for storing the program at least for executing the method for preventing contact sticking in a switching device according to any one of claims 5 to 7.
Further, in the above security monitor, the processor includes a main control chip and a control circuit;
the control circuit comprises an input end, an output end and a change-over switch;
the main control chip and the input end are connected with the first end of the change-over switch;
the output end is respectively connected with the second end of the change-over switch and the third end of the change-over switch;
the output end is also connected with the moving contact or the static contact through the switch main body;
when the main control chip controls the first end of the change-over switch to be conducted with the second end of the change-over switch, the output end outputs current in a first direction and the current flows through the moving contact or the static contact;
when the main control chip controls the first end of the change-over switch to be conducted with the third end of the change-over switch, the output end outputs current in a second direction opposite to the first direction and the current flows through the moving contact or the static contact.
The invention also provides electrical equipment which is provided with the switching device and the safety monitor.
The present invention also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements a method of preventing sticking of contacts in a switching device as described above.
According to the switch device and the method and the equipment for preventing the contacts in the switch device from being adhered, the moving contact of the switch device is provided with the first magnet, the static contact is provided with the second magnet, when the switch device is in a working state, the moving contact is in contact with the static contact, a loop where the switch main body is located is conducted, so that current flowing through the switch main body can be obtained by the safety monitor, when the current of the switch main body is judged to be larger than a preset current threshold value, the polarity of the first magnet or the polarity of the second magnet is changed, the polarity of the first magnet is the same as that of the second magnet, so that the moving contact and the static contact are separated under the repulsive force of the same polarity, the moving contact and the static contact are prevented from being adhered, the normal work of the electrical equipment is prevented from being influenced, even the electrical equipment is damaged, and.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a switching device embodiment of the present invention;
FIG. 2 is a schematic circuit diagram of a safety monitor according to the present embodiment for controlling the current direction;
FIG. 3 is a current flow diagram for the one operating condition of FIG. 2;
FIG. 4 is a current flow diagram for the alternative operating condition of FIG. 2;
FIG. 5 is a flow chart of an embodiment of a method of preventing contact stiction in a switching device of the present invention;
FIG. 6 is a schematic structural diagram of a first embodiment of an apparatus for preventing contact sticking in a switching device according to the present invention;
FIG. 7 is a schematic structural diagram of a second embodiment of the apparatus for preventing contact sticking in a switching device according to the present invention;
fig. 8 is a schematic structural diagram of an embodiment of the security monitor of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic structural diagram of an embodiment of a switching device of the present invention, as shown in fig. 1, the embodiment includes a switch main body 10, a movable contact 11, and a stationary contact 12 matched with the movable contact 11; the moving contact 11 and the fixed contact 12 are arranged on the switch main body 10; the moving contact 11 is provided with a first magnet 111, and the stationary contact 12 is provided with a second magnet 112, wherein the polarity of the first magnet 111 is opposite to that of the second magnet 112; the switch main body 10 is configured to be connected to a safety monitor, and when the current of the switch main body 10 is greater than a preset current threshold, the polarity of the first magnet 111 or the polarity of the second magnet 112 is adjusted to be the same by the safety monitor, so that the moving contact 11 and the static contact 12 are separated by repelling the same polarity. In the present embodiment, the switching device is preferably a contactor. Fig. 1 illustrates a technical solution of the present invention by taking a moving contact 11 and a stationary contact 12 in a single-phase ac contactor as an example, in an actual application, the number of the moving contacts 11 and the stationary contacts 12 in the contactor may be multiple, and the present embodiment does not limit the specific number thereof.
In this embodiment, since the polarity of the first magnet 111 is opposite to the polarity of the second magnet 112, if the switching device needs to be switched to the on state, the movable contact 11 needs to be in contact with the stationary contact 12, and since the polarity of the first magnet 111 in the movable contact 11 is opposite to the polarity of the second magnet 112 in the stationary contact 12, the two magnets attract each other, so that the movable contact 11 and the stationary contact 12 are more easily and more firmly contacted.
In order to prevent the switch device from being broken down by a large current to cause adhesion between the moving contact 11 and the static contact 12 due to an overcurrent phenomenon, in this embodiment, a corresponding current threshold is preset in the safety monitor, so that the switch device enters a conducting state after the moving contact 11 and the static contact 12 are in contact with each other, and at this time, the current flowing through the switch main body 10 is obtained by the corresponding safety monitor, for example, the current in a loop where the switch main body 10 is located may be collected as the current flowing through the switch main body 10. After the current flowing through the switch main body 10 is collected, whether the current flowing through the switch main body 10 is larger than a preset current threshold value or not can be judged; if the current of the switch main body 10 is greater than the preset current threshold, the polarity of the first magnet 111 or the polarity of the second magnet 112 is changed, so that the polarity of the first magnet 111 is the same as the polarity of the second magnet 112, and thus, a repulsive force is generated between the first magnet 111 in the movable contact 11 and the second magnet 112 in the stationary contact 12, so that the movable contact 11 and the stationary contact 12 are separated under the repulsive force. Therefore, even if the moving contact 11 or the static contact 12 is broken down, under the repulsive force between the first electromagnet and the second electromagnet, the moving contact 11 and the static contact 12 can not be separated easily and can not be adhered together, and the moving contact 11 can be reset, so that the switch device is protected, and meanwhile, as the moving contact 11 and the static contact 12 are separated, a loop where the switch device is located is disconnected, so that the normal operation of an electric appliance product using the switch device is ensured, and the electric appliance product using the switch device can not be damaged.
It should be noted that, an electromagnetic mechanism is also disposed in the switch main body 10, so that the moving contact 11 is pulled by a magnetic force generated by the electromagnetic mechanism to move toward the stationary contact 12, the moving contact 11 can be contacted with the stationary contact 12, and the switch device can be turned on. Taking a contactor as an example, an electromagnetic mechanism of the contactor includes an electromagnetic coil, an iron core and an armature, the moving contact 11 is disposed on the armature, after the electromagnetic coil is powered on, the iron core generates magnetic force to attract the armature to move toward the iron core, so as to pull the moving contact 11 to move toward the stationary contact 12, so that the moving contact 11 can be contacted with the stationary contact 12, and no matter how the current direction changes, current still exists in the electromagnetic coil, the iron core can generate magnetic force, and finally, the magnetic force is converted into a traction force for driving the moving contact 11 to move, therefore, in order to ensure that the moving contact and the stationary contact can be separated, a repulsive force generated between the first magnet 111 in the moving contact 11 and the second magnet 112 in the stationary contact 12.
The switch device of this embodiment, by setting the first magnet 111 at the moving contact 11 of the switch device, and setting the second magnet 112 on the static contact 12, when the switch device is in an operating state, the moving contact 11 contacts with the static contact 12, the loop where the switch main body 10 is located is turned on, so that the current flowing through the switch main body 10 is obtained by the safety monitor, when the current of the switch main body 10 is judged to be greater than the preset current threshold, the polarity of the first magnet 111 or the polarity of the second magnet 112 is changed, so that the polarity of the first magnet 111 is the same as the polarity of the second magnet 112, so that the moving contact 11 and the static contact 12 are separated under the repulsive force of the same polarity, thereby preventing the moving contact 11 and the static contact 12 from being adhered, avoiding affecting the normal operation of the electrical equipment and even destroying the electrical equipment, and thus improving the safety of the.
In a specific implementation process, according to characteristics of the electromagnet, when a direction of a current flowing through the electromagnet changes, a polarity of the electromagnet also changes correspondingly, so in this embodiment, by changing a direction of the current flowing through the moving contact 11, or by changing a direction of the current flowing through the stationary contact 12, a polarity of a first electromagnet of the moving contact 11 is opposite to a polarity of a second electromagnet of the stationary contact 12.
Specifically, the switch main body 10 is provided with a first line connected with the movable contact 11; the first line is used for being connected with the safety monitor, and the switching of the current direction of the first line is controlled by the safety monitor to change the polarity of the first magnet 111.
For example, fig. 2 is a circuit schematic diagram of the safety monitor according to the present embodiment for controlling the current direction, fig. 3 is a current flow diagram in one operation state of fig. 2, and fig. 4 is a current flow diagram in another operation state of fig. 2. As shown In fig. 2 to 4, the first line can be regarded as a load R, and the safety monitor can include an input terminal In, an output terminal, and a switch, the input terminal In being connected to a first terminal a of the switch; the output end is respectively connected with the second end b of the change-over switch and the third end c of the change-over switch; the output is also connected to a load R, i.e. the output is also connected to the movable contact 11 via a first line in the switch body 10. Among them, the changeover switch is preferably an electronic switch.
When the first end a of the switch is in contact with the second end b of the switch, the current direction thereof can be referred to as the arrow in fig. 3. When the first terminal a of the switch is in contact with the third terminal c of the switch, the current direction thereof may be as shown with reference to the arrow in fig. 4. In this way, the current flowing through the load R, i.e. the current flowing through the first line, can be controlled by the switch, so that the polarity of the first magnet 111 in the movable contact 11 changes.
Similarly, the switch main body 10 is provided with a second line connected with the fixed contact 12; the second line is used for being connected with the safety monitor, and the switching of the current direction of the second line is controlled by the safety monitor to change the polarity of the second magnet 112. The implementation principle can refer to fig. 2 to 4, and the principle of changing the polarity of the first magnet 111 in the movable contact 11, which is not described herein again.
It should be noted that, in the present embodiment, the polarity of the magnet in the contact is changed by changing the direction of the current flowing through the contact, which is merely an exemplary illustration, and the present embodiment is not limited to other methods capable of changing the polarity of the magnet in the contact.
Fig. 5 is a flowchart of an embodiment of a method for preventing contacts in a switching device from being stuck according to the present invention, where the method for preventing contacts in a switching device of the present embodiment from being stuck may be applied to the switching device of the above embodiment, and as shown in fig. 5, the method for preventing contacts in a switching device of the present embodiment may specifically include the following steps:
500. obtaining a current flowing through a switch body in a switching device;
501. judging whether the current of a switch main body in a switch device is larger than a preset current threshold value or not;
502. and if the current of the switch main body in the switch device is larger than a preset current threshold value, changing the polarity of a first magnet of a moving contact in the switch device or the polarity of a second magnet of a fixed contact in the switch device.
When the polarity of the first magnet of the movable contact in the switch device or the polarity of the second magnet of the fixed contact in the switch device is changed, the polarity of the first magnet of the movable contact and the polarity of the second magnet of the fixed contact can be the same, so that the movable contact and the fixed contact are separated by repulsion of the same polarity, specifically, repulsive force is generated between the first magnet of the movable contact and the second magnet of the fixed contact, so that the movable contact and the fixed contact are separated under the repulsive force generated between the first magnet of the movable contact and the second magnet of the fixed contact. Therefore, even if the moving contact or the static contact is broken down, under the repulsive force between the first electromagnet and the second electromagnet, the moving contact and the static contact can not be separated easily and can not be adhered together, so that the switch device is protected, and meanwhile, as the moving contact and the static contact are separated, a loop where the switch device is located is disconnected, so that the normal operation of an electric appliance using the switch device is ensured, and the electric appliance using the switch device can not be damaged.
If the current of the switch main body in the switch device is smaller than or equal to the preset current threshold, the polarity of the first magnet of the moving contact in the switch device or the polarity of the second magnet of the static contact in the switch device is maintained, and therefore the switch device is in a conducting state.
The main executing body of the method for preventing the contact from being stuck in the switching device provided in this embodiment may be a device for preventing the contact from being stuck in the switching device, and the device may be integrated by software, for example, the management device for preventing the contact from being stuck in the switching device may be an application, or may be a program in an operating system, which is not particularly limited in this invention.
With regard to the method for preventing the sticking of the contacts in the switching device in the above-described embodiment, the specific manner of the respective steps has been described in detail in the embodiment related to the apparatus, and will not be described in detail here.
According to the method for preventing the contacts in the switch device from being adhered, when the current flowing through the switch main body is obtained and the current of the switch main body is judged to be larger than the preset current threshold value, the polarity of the first magnet in the movable contact or the polarity of the second magnet in the static contact is changed, so that the polarity of the first magnet in the movable contact is the same as that of the second magnet in the static contact, the movable contact and the static contact are separated under the repulsive force with the same polarity, the movable contact and the static contact are prevented from being adhered, the normal work of electrical equipment is prevented from being influenced, even the electrical equipment is prevented from being damaged, and the safety of the electrical equipment is improved.
In a specific implementation process, although the method for preventing the contact adhesion in the switch device of this embodiment can separate the moving contact and the stationary contact when the switch device has an overcurrent or an instantaneous large current, so as to disconnect a corresponding loop and protect the switch device and the electrical equipment, the reason of the overcurrent is not analyzed, the electrical equipment is not maintained, and subsequent electrical equipment may not be used. For example, the upper computer of the present embodiment may include a computer, a server, and the like for monitoring whether the switching device is malfunctioning.
In practical applications, after the current of the switch main body is determined to be greater than the preset current threshold, the current is not necessarily caused by a fault, and therefore, in this embodiment, after the current of the switch main body is determined to be greater than the preset current threshold, step 502 is preferentially executed, and after step 502 is executed, the switch device may be turned on again according to a preset period, and steps 500 to 502 are continuously executed, for example, the preset period may be 2s, 3s, 5s, and the like, which may be specifically set according to actual requirements, and this embodiment is not particularly limited. In the process, the change times of changing the polarity of the first magnet in the moving contact or the polarity of the second magnet in the fixed contact can be counted, so that when the counted change times reach a preset time threshold value, fault information can be generated and sent to the upper computer, and the false alarm rate is reduced.
Fig. 6 is a schematic structural diagram of a first embodiment of an apparatus for preventing contact adhesion in a switching device according to the present invention, and as shown in fig. 6, the apparatus for preventing contact adhesion in a switching device according to the present embodiment may include an obtaining module 20, a determining module 21, and a control module 22.
An obtaining module 20 for obtaining the current flowing through the switch main body;
the judging module 21 is configured to judge whether the current of the switch main body is greater than a preset current threshold;
the control module 22 is configured to change a polarity of the first magnet in the movable contact or a polarity of the second magnet in the stationary contact if the current of the switch main body is greater than a preset current threshold, so that the polarity of the first magnet in the movable contact is the same as the polarity of the second magnet in the stationary contact, and the movable contact and the stationary contact are separated by repelling the same polarity.
The device for preventing the contact adhesion in the switch device of the embodiment is characterized in that when the current flowing through the switch body is obtained and the current of the switch body is judged to be larger than the preset current threshold value, the polarity of the first magnet in the movable contact or the polarity of the second magnet in the static contact is changed, so that the polarity of the first magnet in the movable contact is the same as that of the second magnet in the static contact, the movable contact and the static contact are separated under the repulsive force with the same polarity, the movable contact and the static contact are prevented from being adhered, the normal work of electrical equipment is prevented from being influenced, and even the electrical equipment is prevented from being damaged, and the safety of the electrical equipment is improved.
Fig. 7 is a schematic structural diagram of a second embodiment of the apparatus for preventing contact adhesion in a switching device according to the present invention, and as shown in fig. 7, the apparatus for preventing contact adhesion in a switching device according to the present embodiment may further include a generating module 23 and a sending module 24 on the basis of the embodiment shown in fig. 6.
A generating module 23, configured to generate fault information;
and the sending module 24 is used for sending the fault information to an upper computer.
Further, as shown in fig. 7, the apparatus for preventing the contact from being stuck in the switching device of the present embodiment may further include a statistic module 25.
The counting module 25 is used for counting the change times of changing the polarity of the first magnet in the movable contact or the polarity of the second magnet in the fixed contact;
correspondingly, the generating module 23 is specifically configured to generate the fault information if the change time reaches a preset time threshold.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 8 is a schematic structural diagram of an embodiment of a security monitor of the present invention, wherein the security monitor of the present embodiment can monitor the switching device of the above embodiment. As shown in fig. 8, the security monitor of the present embodiment may include a sampling circuit, a memory 31, and a processor 30; the processor 30 is connected to the memory 31 by a communication bus: the sampling circuit is used for collecting current flowing through the switch main body. A processor 30 for calling and executing the program stored in the memory 31; a memory 31 for storing a program for executing at least the method of preventing the sticking of the contacts in the switching device of the above-described embodiment.
Specifically, the processor 30 includes a main control chip and a control circuit, wherein the main control circuit may refer to the circuit diagram shown In fig. 2, and as shown In fig. 2, the control circuit includes an input terminal In, an output terminal, and a switch; the main control chip and the input end In are connected with a first end a of the change-over switch; the output end is respectively connected with the second end b of the change-over switch and the third end c of the change-over switch; the output end is also connected with the moving contact or the static contact through the switch main body; when the main control chip controls the first end a of the change-over switch to be conducted with the second end b of the change-over switch, the output end outputs current in a first direction and the current flows through the moving contact or the static contact; when the main control chip controls the first end a of the change-over switch to be conducted with the third end c of the change-over switch, the output end outputs current in a second direction opposite to the first direction, and the current flows through the moving contact or the static contact.
With respect to the security monitor in the above embodiments, the specific manner of performing the operations thereof has been described in detail in the embodiments related to the method, and will not be elaborated herein.
The invention also provides electrical equipment which is provided with the switching device and the safety monitor.
The present invention also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the method of preventing sticking of contacts in a switching device as described in the above embodiments.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (11)
1. A switch device is characterized by comprising a switch main body, a moving contact, a safety monitor and a static contact matched with the moving contact;
the moving contact is provided with a first magnet, the static contact is provided with a second magnet, and the polarity of the first magnet is opposite to that of the second magnet;
the moving contact and the static contact are arranged on the switch main body;
if the moving contact is contacted with the fixed contact, the switching device enters a conducting state;
the switch main body is used for being connected with the safety monitor, and when the current of the switch main body is larger than a preset current threshold value, the polarity of the first magnet or the polarity of the second magnet is adjusted to be the same by the safety monitor, so that the moving contact and the static contact are separated by repulsion of the same polarity; counting, by the security monitor, a number of changes in the polarity of the first magnet or the polarity of the second magnet; and if the change times reach a preset time threshold value, generating fault information.
2. A switching device, according to claim 1, characterized in that said switching body is provided with a first line connected to said movable contact;
the first circuit is used for being connected with the safety monitor, and the switching of the current direction of the first circuit is controlled by the safety monitor to change the polarity of the first magnet.
3. The switching device according to claim 1, wherein the switch body is provided with a second line connected to the stationary contact;
and the second line is used for being connected with the safety monitor, and the switching of the current direction of the second line is controlled by the safety monitor to change the polarity of the second magnet.
4. The switching device of claim 1, wherein the switching device comprises a contactor.
5. A method of preventing contact stiction in a switching device according to any of claims 1-4, comprising:
obtaining a current flowing through the switch body;
judging whether the current of the switch main body is larger than a preset current threshold value or not;
if the current of the switch main body is larger than a preset current threshold value, changing the polarity of the first magnet or the polarity of the second magnet to enable the polarity of the first magnet to be the same as the polarity of the second magnet, so that the moving contact and the static contact are separated by repelling the same polarity;
counting the number of changes in changing the polarity of the first magnet or the polarity of the second magnet;
and if the change times reach a preset time threshold value, generating fault information.
6. The method of claim 5, further comprising:
and sending the fault information to an upper computer.
7. An apparatus for preventing contact sticking in a switching device according to any one of claims 1 to 4, comprising:
the acquisition module is used for acquiring current flowing through the switch main body;
the judging module is used for judging whether the current of the switch main body is larger than a preset current threshold value or not;
the control module is used for changing the polarity of the first magnet or the polarity of the second magnet if the current of the switch main body is larger than a preset current threshold value, so that the polarity of the first magnet is the same as that of the second magnet, and the moving contact and the fixed contact are separated by repelling the same polarity; counting the number of changes in changing the polarity of the first magnet or the polarity of the second magnet; and if the change times reach a preset time threshold value, generating fault information.
8. A safety monitor for preventing sticking of contacts in a switching device according to any of claims 1-4, comprising a memory and a processor;
the processor and the memory are connected through a communication bus:
the processor is used for calling and executing the program stored in the memory;
the memory for storing the program at least for executing the method for preventing contact sticking in a switching device according to any one of claims 5 to 7.
9. The security monitor of claim 8, wherein the processor comprises a master control chip and a control circuit;
the control circuit comprises an input end, an output end and a change-over switch;
the main control chip and the input end are connected with the first end of the change-over switch;
the output end is respectively connected with the second end of the change-over switch and the third end of the change-over switch;
the output end is also connected with the moving contact or the static contact through the switch main body;
when the main control chip controls the first end of the change-over switch to be conducted with the second end of the change-over switch, the output end outputs current in a first direction and the current flows through the moving contact or the static contact;
when the main control chip controls the first end of the change-over switch to be conducted with the third end of the change-over switch, the output end outputs current in a second direction opposite to the first direction and the current flows through the moving contact or the static contact.
10. An electrical appliance, characterized in that a switching device according to any one of claims 1-4 is provided.
11. A storage medium, characterized in that it has stored thereon a computer program which, when being executed by a processor, carries out a method for preventing sticking of contacts in a switching device according to any one of claims 5 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479975.XA CN110164719B (en) | 2019-06-04 | 2019-06-04 | Switching device, method and apparatus for preventing contact adhesion in switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910479975.XA CN110164719B (en) | 2019-06-04 | 2019-06-04 | Switching device, method and apparatus for preventing contact adhesion in switching device |
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| CN110164719A CN110164719A (en) | 2019-08-23 |
| CN110164719B true CN110164719B (en) | 2020-05-19 |
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| CN201910479975.XA Active CN110164719B (en) | 2019-06-04 | 2019-06-04 | Switching device, method and apparatus for preventing contact adhesion in switching device |
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| CN2166515Y (en) * | 1993-07-16 | 1994-05-25 | 吕向阳 | Energy-saving AC contactor |
| EP0948018A2 (en) * | 1998-03-31 | 1999-10-06 | KMW Co., Ltd. | Switch with a rocker, which has an affixed magnet |
| CN2826672Y (en) * | 2005-07-08 | 2006-10-11 | 东南大学 | Permanent-magnetic contactor and its control device |
| CN101908441A (en) * | 2010-07-02 | 2010-12-08 | 北海市深蓝科技发展有限责任公司 | Relay contact structure capable of reducing dithering |
| CN204632680U (en) * | 2013-07-12 | 2015-09-09 | 欧姆龙株式会社 | Contact mechanism portion |
| CN109148225A (en) * | 2017-06-28 | 2019-01-04 | 富士通电子零件有限公司 | electromagnetic relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2166515Y (en) * | 1993-07-16 | 1994-05-25 | 吕向阳 | Energy-saving AC contactor |
| EP0948018A2 (en) * | 1998-03-31 | 1999-10-06 | KMW Co., Ltd. | Switch with a rocker, which has an affixed magnet |
| CN2826672Y (en) * | 2005-07-08 | 2006-10-11 | 东南大学 | Permanent-magnetic contactor and its control device |
| CN101908441A (en) * | 2010-07-02 | 2010-12-08 | 北海市深蓝科技发展有限责任公司 | Relay contact structure capable of reducing dithering |
| CN204632680U (en) * | 2013-07-12 | 2015-09-09 | 欧姆龙株式会社 | Contact mechanism portion |
| CN109148225A (en) * | 2017-06-28 | 2019-01-04 | 富士通电子零件有限公司 | electromagnetic relay |
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| Publication number | Publication date |
|---|---|
| CN110164719A (en) | 2019-08-23 |
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