CN112908778B - Method and device for controlling direct current relay and direct current relay - Google Patents
Method and device for controlling direct current relay and direct current relay Download PDFInfo
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- CN112908778B CN112908778B CN201911135213.4A CN201911135213A CN112908778B CN 112908778 B CN112908778 B CN 112908778B CN 201911135213 A CN201911135213 A CN 201911135213A CN 112908778 B CN112908778 B CN 112908778B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/002—Monitoring or fail-safe circuits
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Abstract
The application relates to the technical field of relays and discloses a method for controlling a direct-current relay. The method for controlling the direct current relay includes: and detecting the actual gap voltage between the moving contact and the static contact, and obtaining the coil voltage of the relay at the next electrification according to the actual gap voltage and the standard gap voltage so as to reduce the difference value between the actual gap voltage and the standard voltage of the moving contact and the static contact after the next electrification of the relay. By adopting the method for controlling the direct-current relay, the contact surfaces of the moving contact and the static contact of the normally open contact of the relay are not easy to form corrosion pits or burrs. The application also discloses a device for controlling the direct current relay and the direct current relay.
Description
Technical Field
The present application relates to the field of relay technology, for example to a method, an apparatus and a dc relay for controlling a dc relay.
Background
At present, in a direct current relay, an armature is wound with a coil, after the coil is electrified, the armature acts, a normally open contact is closed, meanwhile, a spring is installed in the relay, after the coil is electrified, the spring provides elasticity to reset the armature, and the normally open contact is disconnected. In the closing process of the normally open contact, under the combined action of electromagnetic driving force and elastic force, the speed of the movable contact is continuously increased, the electromotive force between the contacts becomes zero at the moment of the first contact of the movable contact and the static contact, and then the movable contact and the static contact generate a gap due to collision, so that the voltage rises from zero, which is called as gap voltage. When the power system in the relay is in steady motion, the gap voltage value is a stable value.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
along with the increase of the action times of the relay armature, the speed of the armature during action is increased, when the moving contact and the static contact of the normally open contact of the relay are closed, the momentum of the moving contact is increased, and the contact surfaces of the moving contact and the static contact are easy to form corrosion pits or burrs.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for controlling a direct-current relay and the direct-current relay, so as to solve the technical problem that an etching pit or burr is easily formed on a contact surface of a moving contact and a static contact of a normally open contact of the relay.
In some embodiments, a method for controlling a dc relay includes:
detecting actual gap voltage between the moving contact and the static contact;
and obtaining the coil voltage of the relay at the next electrifying according to the actual gap voltage and the standard gap voltage so as to reduce the difference value between the actual gap voltage and the standard voltage between the moving contact and the static contact after the relay is electrified at the next time.
In some embodiments, an apparatus for controlling a dc relay includes:
the detection module is configured to detect actual gap voltage between the moving contact and the static contact;
and the calculation module is configured to obtain the coil voltage of the relay at the next electrification according to the actual gap voltage and the standard gap voltage so as to reduce the difference value between the actual gap voltage and the standard voltage after the next electrification of the relay between the movable contact and the static contact.
In some embodiments, an apparatus for controlling a dc relay includes a processor and a memory storing program instructions, the processor being configured to, when executing the program instructions, perform the method for controlling a dc relay provided by the foregoing embodiments.
In some embodiments, the dc relay includes the apparatus for controlling a dc relay provided in the foregoing embodiments.
The method, the device and the direct current relay for controlling the direct current relay provided by the embodiment of the disclosure can realize the following technical effects:
and the coil voltage of the relay during next electrification is adjusted, and the intensity of the relay during next closing collision of the moving contact and the static contact of the normally open contact can be adjusted. The more severe the impact, the greater the actual gap voltage between the moving and stationary contacts. By adjusting the coil voltage of the relay during next electrification, the difference value between the actual gap voltage and the standard gap voltage between the moving contact and the static contact after the relay is electrified next time is reduced, the intensity of collision of the moving contact and the static contact is reduced, and the contact surface of the moving contact and the static contact of the normally open contact of the relay is not easy to form pits or burrs.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated in drawings corresponding to, and not limiting to, embodiments in which elements having the same reference number designation are illustrated as similar elements and in which:
fig. 1 is a schematic flow chart diagram of a method for controlling a dc relay according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart diagram of a method for controlling a dc relay according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram illustrating a change in voltage detection values when the movable and stationary contacts are closed according to the embodiment of the disclosure;
fig. 4 is a schematic diagram of an apparatus for controlling a dc relay according to an embodiment of the disclosure;
fig. 5 is a schematic diagram of an apparatus for controlling a dc relay according to an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
At present, in a direct current relay, an armature is wound with a coil, after the coil is electrified, the armature acts, a normally open contact is closed, meanwhile, a spring is installed in the relay, after the coil is electrified, the spring provides elasticity to reset the armature, and the normally open contact is disconnected. In the closing process of the normally open contact, under the combined action of electromagnetic driving force and elastic force, the speed of the moving contact is continuously increased, the electromotive force between the contacts becomes zero at the moment when the moving contact and the static contact are contacted for the first time, then, due to collision, the moving contact and the static contact generate a gap, and the voltage rises from zero, which is called gap voltage. When the power system in the relay is stable, the gap voltage value is a stable value. The action frequency of the relay armature is increased, the elastic force of the spring is weakened, the action speed of the armature is increased under the condition that the electromagnetic driving force provided by the coil is not changed, the momentum of the movable contact is increased at the moment that the movable contact and the fixed contact of the normally open contact of the relay are closed, the acting force applied to the contact surface of the movable contact and the fixed contact is increased in the collision process of the movable contact and the fixed contact, the gap between the movable contact and the fixed contact is increased after collision, and the gap voltage is increased. In the embodiment of the disclosure, by changing the coil voltage when the relay is powered on, the gap voltage generated when the moving contact and the static contact of the normally open contact are closed is maintained in a certain range, that is, the momentum of the moving contact is controlled in a certain range, and the force applied to the contact surface of the moving contact and the static contact during collision is controlled in a certain range, so that the contact surface of the moving contact and the static contact is not easy to form corrosion pits or burrs, further, the contact resistance between the moving contact and the static contact is reduced, the electric arc generated when the moving contact and the static contact are disconnected is reduced, and the service life of the direct current relay is prolonged.
In the embodiment of the disclosure, the moving and static contacts refer to a pair of moving and static contacts corresponding to the normally open contacts in the relay.
Fig. 1 is a schematic flowchart of a method for controlling a dc relay according to an embodiment of the present disclosure.
In this embodiment, a method for controlling a dc relay includes:
Optionally, the actual gap voltage between the moving and static contacts is detected when the relay is not first used and the moving and static contacts of the normally open contacts of the relay are closed.
Optionally, detecting an actual gap voltage between the moving contact and the static contact includes: and obtaining a first zero point of the voltage detection value between the movable contact and the fixed contact, and taking the maximum voltage detection value after the first zero point as the actual gap voltage, wherein no other zero point exists in a set time period before the first zero point of the voltage detection value.
And step 102, obtaining the coil voltage of the relay at the next electrification according to the actual gap voltage and the standard gap voltage so as to reduce the difference value between the actual gap voltage and the standard voltage between the moving contact and the static contact after the next electrification of the relay.
Optionally, the standard gap voltage is set by the dc relay at factory. Alternatively, the standard gap voltage is calculated from two or more actual gap voltages. For example, the standard gap voltage is an average of two or more actual gap voltages; alternatively, the standard gap voltage is the median of two or more actual gap voltages.
The two or more actual gap voltages are detected during an expected operating state of the relay, wherein an armature of the relay acts at a predetermined speed after a coil of the relay is energized during the expected operating state of the relay. Optionally, the two or more actual gap voltages are detected when the relay is used for the first time and the moving and static contacts of the normally open contact of the relay are closed. For example, when the relay is used for the first time, the actual gap voltage between the moving contact and the static contact under the current working condition is detected for 2 times, 3 times, 4 times or 5 times, and the average value of 2, 3, 4 or 5 actual gap voltages is taken as the standard gap voltage. When the relay is used for the first time, two or more actual detection voltages are detected, so that the working state of the relay can be maintained in an expected working state in the subsequent use process of the relay, namely, an armature in the relay acts at a preset speed after a coil of the relay is electrified.
The higher the voltage of a relay coil is, the higher the electromagnetic driving force generated on the armature is, the higher the action speed of the armature is, the higher the speed of a movable contact of a normally open contact of the relay is, the more violent the collision between a movable contact and a static contact is, and the higher the actual gap voltage between the movable contact and the static contact is; the lower the voltage of a relay coil is, the smaller the electromagnetic driving force generated on the armature is, the slower the action speed of the armature is, the slower the speed of the moving contact of the normally open contact of the relay is, the less violent the collision between the moving contact and the static contact is, and the smaller the actual gap voltage between the moving contact and the static contact is. In order to reduce the difference value between the actual gap voltage between the moving contact and the static contact after the relay is electrified next time and the standard voltage, the relay can be electrified this time, and when the actual gap voltage is greater than the standard gap voltage, the second voltage is smaller than the first voltage; when the relay is electrified at this time and the actual gap voltage is smaller than the standard gap voltage, the second voltage is larger than the first voltage; the first voltage is coil voltage when the relay is electrified at this time; the second voltage is the coil voltage when the relay is powered on next time.
Optionally, obtaining a coil voltage of the relay at the next power-on time according to the actual gap voltage and the standard gap voltage includes: calculating the difference value between the standard gap voltage and the actual gap voltage, and processing the difference value through a Proportional-Integral (PI) algorithm to obtain the coil voltage when the relay is electrified next time; or, calculating a difference value between the standard gap voltage and the actual gap voltage, and processing the difference value through a Proportional-Integral-Derivative (PID) algorithm to obtain the coil voltage of the relay at the next power-on time. The difference value is processed through the PID algorithm, and the coil voltage of the relay in the next electrifying process can be obtained quickly and accurately.
The PI algorithm is as follows:
the PID algorithm is as follows:
wherein u (k) is the coil voltage when the relay is powered on next time, e (k)) The difference value of the standard gap voltage and the actual gap voltage after the relay is electrified this time, e (K-1) is the difference value of the standard gap voltage and the actual gap voltage after the relay is electrified last time, K is the electrifying frequency of the relay, and K is p 、K i And K d Are coefficients.
And the coil voltage of the relay during next electrification is adjusted, and the intensity of the relay during next closing collision of the moving contact and the static contact of the normally open contact can be adjusted. The more severe the impact, the greater the actual gap voltage between the moving and stationary contacts. By adjusting the coil voltage of the relay during next electrification, the difference value between the actual gap voltage and the standard gap voltage between the moving contact and the static contact after the relay is electrified next time is reduced, the intensity of collision of the moving contact and the static contact is reduced, and the contact surface of the moving contact and the static contact of the normally open contact of the relay is not easy to form pits or burrs.
Fig. 2 is a schematic flowchart of a method for controlling a dc relay according to an embodiment of the present disclosure. In this embodiment, a method for controlling a direct current relay includes:
and 204, obtaining the coil voltage of the relay at the next electrifying according to the actual gap voltage and the standard gap voltage so as to reduce the difference value between the actual gap voltage and the standard voltage between the moving contact and the static contact after the relay is electrified at the next time.
The process of first using the relay refers to the process of obtaining the standard gap voltage. For example, when the actual gap voltage is detected twice to obtain the standard gap voltage, the relay performs the first two actions-releasing actions, i.e. the relay is used for the first time, and then the actions-releasing actions are performed by the relay, which are all the actions that the relay is not used for the first time; when the actual gap voltage is detected for 5 times to obtain the standard gap voltage, the actions of the first 5 actions and the release of the relay are all used for the first time, and when the actions of the action and the release of the 6 th or more actions and the release of the relay are all used for the non-first time.
Fig. 3 is a schematic diagram illustrating a change in voltage detection values when the moving contact and the stationary contact are closed according to an embodiment of the disclosure. In fig. 3, U is the voltage between the moving and stationary contacts, and t is time. The point A is not collided with the movable and static contacts, the point B is collided with the movable and static contacts for the first time, the point B is a first zero point of voltage detection values between the movable and static contacts, the voltage value corresponding to the point C is the largest voltage detection value after the first zero point and is also the peak value of the voltage detection value after the first zero point, the point D is collided with the movable and static contacts for the second time, and the point D is a second zero point of the voltage detection values of the movable and static contacts.
In some embodiments, the actual gap voltage is obtained according to more than one peak value of the voltage detection value after the movable and static contacts are closed. For example, obtaining the actual gap voltage according to the peak value of the voltage detection value after the movable and stationary contacts are closed includes: in the process of detecting the voltage between the moving contact and the static contact, obtaining a first zero point of a voltage detection value, and taking the maximum voltage detection value after the first zero point as an actual detection voltage, wherein no other zero point exists in a set time period before the first zero point of the voltage detection value; or, obtaining the actual gap voltage according to the peak value of the voltage detection value after the movable contact and the fixed contact are closed, including: and in the process of detecting the voltage between the movable contact and the fixed contact, obtaining a second zero point of the voltage detection value, and taking the maximum voltage detection value after the second zero point as the actual detection voltage. In other examples, obtaining the actual gap voltage according to the peak values of the two voltage detection values after the movable and stationary contacts are closed includes: in the process of detecting the voltage between the moving contact and the static contact, the first zero point of the voltage detection value is obtained, and the average value of the peak values of the two voltage detection values following the first zero point is used as the actual gap voltage. Similarly, when the actual gap voltage is obtained according to the peak values of the three or more voltage detection values after the movable and stationary contacts are closed, the first zero point of the voltage detection values is obtained, and the characteristic value of the peak value of the three or more voltage detection values immediately after the first zero point is taken as the actual gap voltage, wherein the characteristic value includes any one of the average value and the median.
Fig. 4 is a schematic diagram of an apparatus for controlling a dc relay according to an embodiment of the present disclosure.
In this embodiment, the apparatus for controlling a direct current relay includes:
a detection module 41 configured to detect an actual gap voltage between the moving and stationary contacts;
and the calculation module 42 is configured to obtain the coil voltage of the relay at the next power-on according to the actual gap voltage and the standard gap voltage, so as to reduce the difference between the actual gap voltage and the standard voltage between the moving contact and the static contact after the next power-on of the relay.
And the coil voltage of the relay during next electrification is adjusted, and the intensity of the moving contact and the static contact of the normally open contact of the relay during next closing collision can be adjusted. The more severe the impact, the greater the actual gap voltage between the moving and stationary contacts. By adjusting the coil voltage of the relay during next electrification, the difference value between the actual gap voltage and the standard gap voltage between the moving contact and the static contact after the relay is electrified next time is reduced, the intensity of collision of the moving contact and the static contact is reduced, and the contact surface of the moving contact and the static contact of the normally open contact of the relay is not easy to form pits or burrs.
Optionally, the detection module is specifically configured to: when the relay is not used for the first time and the movable and static contacts of the normally open contact of the relay are closed, the actual gap voltage between the movable and static contacts is detected.
Optionally, the detection module includes a detection unit configured to obtain a first zero point of the voltage detection value between the moving and stationary contacts, and to take a maximum voltage detection value after the first zero point as the actual gap voltage.
Optionally, the calculation module comprises: the first calculation unit is configured to calculate a difference value between the standard gap voltage and the actual gap voltage, and the difference value is processed through a Proportional Integral (PI) algorithm to obtain a coil voltage when the relay is electrified next time; or the second calculation unit is configured to calculate a difference value between the standard gap voltage and the actual gap voltage, and the difference value is processed through a proportional-integral-derivative (PID) algorithm to obtain a coil voltage when the relay is electrified next time.
Alternatively, the standard gap voltage is calculated from two or more actual gap voltages.
Optionally, the standard gap voltage is an average of two or more actual gap voltages.
Optionally, the two or more actual gap voltages are detected when the relay is used for the first time and the moving contact and the static contact of the normally open contact of the relay are closed.
In some embodiments, an apparatus for controlling a dc relay includes a processor and a memory storing program instructions, the processor being configured to, when executing the program instructions, perform the method for controlling a dc relay provided by the foregoing embodiments.
Fig. 5 is a schematic diagram of an apparatus for controlling a dc relay according to an embodiment of the present disclosure. In this embodiment, the apparatus for controlling a dc relay includes:
a processor (processor) 51 and a memory (memory) 52, and may further include a Communication Interface (Communication Interface) 53 and a bus 55. The processor 51, the communication interface 53 and the memory 52 may communicate with each other through a bus 55. The communication interface 53 may be used for information transfer. The processor 51 may call logic instructions in the memory 52 to perform the method for controlling the dc relay provided by the foregoing embodiments.
Furthermore, the logic instructions in the memory 52 may be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products.
The memory 52 is used as a computer readable storage medium for storing software programs, computer executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 51 executes the functional application and data processing by executing the software program, instructions and modules stored in the memory 52, that is, implements the method in the above-described method embodiments.
The memory 52 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 52 may include high speed random access memory and may also include non-volatile memory.
The embodiment of the disclosure provides a direct current relay, which comprises the device for controlling the direct current relay provided by the embodiment.
The embodiment of the disclosure provides a computer-readable storage medium storing computer-executable instructions configured to execute the method for controlling a direct current relay provided by the foregoing embodiment.
The disclosed embodiments provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the method for controlling a direct current relay provided by the aforementioned embodiments.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method in the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and the drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the disclosed embodiments includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses, and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of a unit may be merely a division of a logical function, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for controlling a dc relay, comprising:
detecting actual gap voltage between the moving contact and the static contact; in the closing process of the normally open contact, under the combined action of electromagnetic driving force and elastic force, the speed of the movable contact is continuously increased, the electromotive force between the contacts becomes zero at the moment of the first contact of the movable contact and the static contact, and then the movable contact and the static contact generate a gap due to collision, so that the voltage rises from zero, which is called gap voltage;
and obtaining the coil voltage of the relay at the next electrifying according to the actual gap voltage and the standard gap voltage so as to reduce the difference value between the actual gap voltage and the standard voltage between the moving contact and the static contact after the relay is electrified at the next time.
2. The method of claim 1, wherein the actual gap voltage between the moving and stationary contacts of the normally open contact of the relay is detected when the relay is not first used and the moving and stationary contacts are closed.
3. The method of claim 1, wherein detecting the actual gap voltage between the moving and stationary contacts comprises:
and obtaining a first zero point of the voltage detection value between the moving contact and the static contact, and taking the maximum voltage detection value after the first zero point as the actual gap voltage.
4. The method of claim 1, wherein obtaining the coil voltage at the next power-up of the relay from the actual gap voltage and the standard gap voltage comprises:
calculating a difference value between the standard gap voltage and the actual gap voltage, and processing the difference value through a Proportional Integral (PI) algorithm to obtain a coil voltage of the relay when the relay is electrified next time; or,
and calculating the difference value between the standard gap voltage and the actual gap voltage, and processing the difference value through a Proportional Integral Derivative (PID) algorithm to obtain the coil voltage of the relay when the relay is electrified next time.
5. The method according to any one of claims 1 to 4, wherein the standard gap voltage is calculated from two or more actual gap voltages.
6. The method of claim 5, wherein the standard gap voltage is an average of two or more actual gap voltages.
7. The method of claim 5, wherein the two or more actual gap voltages are sensed when the relay is first used and the moving and static contacts of the normally open contact of the relay are closed.
8. An apparatus for controlling a direct current relay, comprising:
the detection module is configured to detect actual gap voltage between the moving contact and the static contact; in the closing process of the normally open contact, under the combined action of electromagnetic driving force and elastic force, the speed of the movable contact is continuously increased, the electromotive force between the contacts becomes zero at the moment of the first contact of the movable contact and the static contact, and then the movable contact and the static contact generate a gap due to collision, so that the voltage rises from zero, which is called gap voltage;
and the calculation module is configured to obtain the coil voltage of the relay at the next electrification according to the actual gap voltage and the standard gap voltage so as to reduce the difference value between the actual gap voltage and the standard voltage after the next electrification of the relay between the movable contact and the static contact.
9. An apparatus for controlling a dc relay, comprising a processor and a memory having stored program instructions, characterized in that the processor is configured to perform the method for controlling a dc relay according to any one of claims 1 to 7 when executing the program instructions.
10. A dc relay, characterized by comprising an apparatus for controlling a dc relay according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911135213.4A CN112908778B (en) | 2019-11-19 | 2019-11-19 | Method and device for controlling direct current relay and direct current relay |
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| JP2011060547A (en) * | 2009-09-09 | 2011-03-24 | Fujitsu Component Ltd | Electromagnetic relay |
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| CN109859991A (en) * | 2017-11-30 | 2019-06-07 | 比亚迪股份有限公司 | Relay |
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| US3275538A (en) * | 1960-09-20 | 1966-09-27 | Gen Motors Corp | Electrochemical machining method and apparatus |
| JP2005019243A (en) * | 2003-06-26 | 2005-01-20 | Nippon Soken Inc | Contact life determining device |
| JP2011060547A (en) * | 2009-09-09 | 2011-03-24 | Fujitsu Component Ltd | Electromagnetic relay |
| CN104508785A (en) * | 2012-08-31 | 2015-04-08 | 欧姆龙株式会社 | Electromagnetic relay switch deposition detection device and electromagnetic relay switch deposition detection method |
| CN109859991A (en) * | 2017-11-30 | 2019-06-07 | 比亚迪股份有限公司 | Relay |
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| 继电器可靠性提升探讨;江长流;《电工材料》;20170331(第3期);第23-28页 * |
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