CN112216566A - Permanent magnet switch drive loop protection method, system and storage medium - Google Patents
Permanent magnet switch drive loop protection method, system and storage medium Download PDFInfo
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- CN112216566A CN112216566A CN202011022286.5A CN202011022286A CN112216566A CN 112216566 A CN112216566 A CN 112216566A CN 202011022286 A CN202011022286 A CN 202011022286A CN 112216566 A CN112216566 A CN 112216566A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
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Abstract
The invention discloses a method, a system and a storage medium for protecting a permanent magnet switch driving loop, wherein the method comprises the following steps: measuring an equivalent resistance value of the permanent magnet switch driving loop; subtracting a set resistance value from the equivalent resistance value to obtain a resistance difference value; and determining that the resistance difference value is larger than a threshold value, and locking the permanent magnet switch. According to the embodiment of the invention, the equivalent resistance value of the driving loop of the permanent magnet switch is measured, the equivalent resistance value is compared with the set resistance value, and the permanent magnet switch is locked under the condition that the equivalent resistance value exceeds the set resistance value by a certain threshold value, so that the permanent magnet switch is protected under the condition that the resistance value of the driving loop of the permanent magnet switch is abnormal. The invention can be widely applied to the field of permanent magnet switches.
Description
Technical Field
The invention relates to the technical field of permanent magnet switches, in particular to a method and a system for protecting a driving loop of a permanent magnet switch and a storage medium.
Background
Because the operation power of the high-voltage permanent magnet switch is very large, the instantaneous peak current of the switching-on operation of the general 220V voltage exceeds 70A, the resistance of a lead of a driving loop, the resistance of a terminal joint and the resistance of a connector are slightly increased, the operation time is prolonged, the operation is blocked, even the switch fails to operate, and the power electronic switch of the driving loop is burnt.
At present, the mainstream permanent magnet switch mainly performs peak current protection and overvoltage/undervoltage protection on the permanent magnet switch, and neglects the influence of operation clamping stagnation and the like caused by the increase of resistance on an operation loop.
Disclosure of Invention
In view of the above, the present invention provides a method, a system and a storage medium for protecting a driving loop of a permanent magnet switch, so as to protect the permanent magnet switch in case of abnormal resistance of the driving loop of the permanent magnet switch.
The first technical scheme adopted by the invention is as follows:
a permanent magnet switch driving loop protection method comprises the following steps:
measuring an equivalent resistance value of the permanent magnet switch driving loop;
subtracting a set resistance value from the equivalent resistance value to obtain a resistance difference value;
and determining that the resistance difference value is larger than a threshold value, and locking the permanent magnet switch.
Further, the permanent magnet switch driving loop protection method is executed periodically.
Further, the measuring an equivalent resistance value of the permanent magnet switch driving loop includes:
and measuring the equivalent resistance value of the driving loop of the permanent magnet switch by adopting a Wheatstone bridge.
Further, the method for protecting the driving circuit of the permanent magnet switch further comprises the following steps:
and determining that the resistance difference is larger than a threshold value, and carrying out sound and light alarm.
Further, the measuring an equivalent resistance value of the permanent magnet switch driving loop includes:
performing capacitance filtering on the permanent magnet switch driving loop;
and measuring the equivalent resistance value of the permanent magnet switch driving loop.
Further, the permanent magnet switch drive loop protection method is performed during the permanent magnet switch idle period.
The second technical scheme adopted by the invention is as follows:
a permanent magnet switch drive circuit protection system comprising:
the measuring module is used for measuring the equivalent resistance value of the permanent magnet switch driving loop;
the difference module is used for subtracting a set resistance value from the equivalent resistance value to obtain a resistance difference value;
and the locking module is used for determining that the resistance difference value is greater than a threshold value and locking the permanent magnet switch.
Further, the measuring an equivalent resistance value of the permanent magnet switch driving loop includes:
and measuring the equivalent resistance value of the driving loop of the permanent magnet switch by adopting a Wheatstone bridge.
The third technical scheme adopted by the invention is as follows:
a permanent magnet switch drive circuit protection system comprising:
at least one processor, and,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the permanent magnet switch drive loop protection method.
The fourth technical scheme adopted by the invention is as follows:
a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, implements the permanent magnet switch drive loop protection method.
According to the embodiment of the invention, the equivalent resistance value of the driving loop of the permanent magnet switch is measured, the equivalent resistance value is compared with the set resistance value, and the permanent magnet switch is locked under the condition that the equivalent resistance value exceeds the set resistance value by a certain threshold value, so that the permanent magnet switch is protected under the condition that the resistance value of the driving loop of the permanent magnet switch is abnormal.
Drawings
Fig. 1 is a flowchart of a method for protecting a driving circuit of a permanent magnet switch according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a permanent magnet switch driving circuit of a method for protecting the permanent magnet switch driving circuit according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a circuit for measuring resistance of a driving circuit of a permanent magnet switch according to a method for protecting the driving circuit of the permanent magnet switch according to an embodiment of the present invention.
Detailed Description
The conception, the specific structure and the technical effects of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the schemes and the effects of the present invention.
The invention is described in further detail below with reference to the figures and the specific embodiments. The step numbers in the following embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the execution order of each step in the embodiments can be adapted according to the understanding of those skilled in the art. Further, for several described in the following embodiments, it is denoted as at least one.
It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature or indirectly fixed or connected to the other feature. Furthermore, the descriptions of upper, lower, left, right, etc. used in the present disclosure are only relative to the mutual positional relationship of the constituent parts of the present disclosure in the drawings. As used in this disclosure, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any combination of one or more of the associated listed items.
The embodiment of the invention provides a method for protecting a driving loop of a permanent magnet switch, which comprises the following steps of referring to fig. 1:
s100, measuring an equivalent resistance value of the permanent magnet switch driving loop;
s200, subtracting a set resistance value from the equivalent resistance value to obtain a resistance difference value;
s300, determining that the resistance difference value is larger than a threshold value, and locking the permanent magnet switch.
Specifically, the permanent magnet switch is locked under the condition that the equivalent resistance value of the permanent magnet switch driving loop exceeds a certain range by measuring the equivalent resistance value of the permanent magnet switch driving loop so as to protect the permanent magnet switch.
The permanent magnet switch adopts a bistable state permanent magnet mechanism with an under-voltage release arranged therein, and is combined with a mechanical manual release to form an integrated design, so that manual brake separation is convenient and reliable. The permanent magnetic mechanism opening brake is combined with the spring opening brake, so that the distribution of the opening brake speed is more ideal. Compared with a spring operating mechanism, the permanent magnet mechanism has the advantages that the number of movable parts is greatly reduced, the reliability and the mechanical life are greatly improved, and the permanent magnet switch is an ideal substitute product of a spring operating mechanism type switch.
The driving circuit is a part in charge of driving control in the permanent magnet switch, and the closing and opening of the permanent magnet switch can be controlled by inputting a control signal in the driving circuit.
Referring to fig. 2, in actual engineering use, the electromagnetic coil is at a certain distance from the electromagnetic controller, so that in the electromagnetic drive control process, the wire reactance needs to be calculated together with the electromagnetic coil reactance. The electromagnetic coil reactance ZL ═ RL + jXL, and ZL ═ RL when not in operation; the wire reactance Zr ≈ RL1+ jXL1+ RL2+ jXL2, and is usually straight when wiring, so that distributed inductances jXL1 and jXL2 can be ignored, and Zr ≈ RL1+ RL 2. The peak current limit Imax of the electromagnetic operation loop is Vc/(RL + RL1+ RL 2); optimum lossless control operation is achieved when RL1+ RL2 is 0, and the effect of wire resistance on high voltage switching operation is evident when RL1+ RL2 is close to 0.1 × RL. Therefore, the wire needs to be considered when measuring the equivalent resistance value of the permanent magnet switch driving circuit.
The set resistance value is a preset resistance value, the threshold value is a preset threshold value, whether the equivalent resistance value is in a reasonable range or not can be determined through the set resistance value and the threshold value, and if the equivalent resistance value is not in the reasonable range, the permanent magnet switch is locked to protect the permanent magnet switch.
The resistance difference is obtained by subtracting the set resistance value from the equivalent resistance value, and is used for judging whether the equivalent resistance value is in a reasonable range.
It is understood that the permanent magnet switch drive loop protection method is performed periodically.
Specifically, referring to fig. 3, the permanent magnet switch driving circuit protection method may be periodically performed by controlling the relay through the microprocessor. By periodically executing the protection method of the permanent magnet switch driving circuit, the abnormal resistance value of the permanent magnet switch driving circuit can be ensured to be detected in time.
It is understood that, with reference to fig. 3, the measuring of the equivalent resistance value of the permanent magnet switch drive circuit includes:
and measuring the equivalent resistance value of the driving loop of the permanent magnet switch by adopting a Wheatstone bridge.
Specifically, a wheatstone bridge is formed by the three resistors and the equivalent resistor of the permanent magnet switch driving loop, so that the measurement of the equivalent resistor of the permanent magnet switch driving loop can be realized.
The Wheatstone bridge is a bridge circuit composed of four resistors, the four resistors are respectively called as bridge arms of the bridge, the Wheatstone bridge measures the change of the physical quantity by using the change of the resistors, the singlechip acquires and processes the voltages at the two ends of the variable resistor, and the change of the corresponding physical quantity can be calculated, so that the measuring method is high in precision.
It can be understood that the method for protecting the driving circuit of the permanent magnet switch further comprises the following steps:
and determining that the resistance difference is larger than a threshold value, and carrying out sound and light alarm.
Specifically, under the condition that the equivalent resistance value of the permanent magnet switch driving circuit is recognized to exceed a certain range, an audible and visual alarm is started to warn an operator.
It is understood that the measuring of the equivalent resistance value of the permanent magnet switch driving loop includes:
performing capacitance filtering on the permanent magnet switch driving loop;
and measuring the equivalent resistance value of the permanent magnet switch driving loop.
Specifically, referring to fig. 3, the capacitive filtering of the permanent magnet switch drive loop may be achieved by a capacitor. The alternating current part in the permanent magnet switch driving loop can be filtered through capacitance filtering.
It will be appreciated that the permanent magnet switch drive loop protection method is performed during periods when the permanent magnet switch is idle.
Specifically, referring to fig. 2, the electromagnetic coil reactance ZL + RL jXL is set to ZL + RL when not operating, so that the resistance measurement is more accurate during the permanent magnet switch idle period, i.e., during the permanent magnet switch non-operating period.
The embodiment of the invention also provides a permanent magnet switch driving loop protection system, which comprises:
the measuring module is used for measuring the equivalent resistance value of the permanent magnet switch driving loop;
the difference module is used for subtracting a set resistance value from the equivalent resistance value to obtain a resistance difference value;
and the locking module is used for determining that the resistance difference value is greater than a threshold value and locking the permanent magnet switch.
Specifically, the contents in the above method embodiments are all applicable to the present system embodiment, the functions specifically implemented by the present system embodiment are the same as those in the above method embodiment, and the beneficial effects achieved by the present system embodiment are also the same as those achieved by the above method embodiment.
The layers, modules, units, platforms, and/or the like included in the system may be implemented or embodied by computer hardware, a combination of hardware and software, or by computer instructions stored in a non-transitory computer readable memory. The methods may be implemented in a computer program using standard programming techniques, including a non-transitory computer-readable storage medium configured with the computer program, where the storage medium so configured causes a computer to operate in a specific and predefined manner, according to the methods and figures described in the detailed description. Each program may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) can be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language. Furthermore, the program can be run on a programmed application specific integrated circuit for this purpose.
The data processing flows performed by the layers, modules, units, and/or platforms included in the system may be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The data processing flows correspondingly performed by the layers, modules, units and/or platforms included in the system of embodiments of the invention may be performed under the control of one or more computer systems configured with executable instructions, and may be implemented as code (e.g., executable instructions, one or more computer programs, or one or more applications) collectively executed on one or more processors, by hardware, or a combination thereof. The computer program includes a plurality of instructions executable by one or more processors.
It is understood that the measuring of the equivalent resistance value of the permanent magnet switch driving loop includes:
and measuring the equivalent resistance value of the driving loop of the permanent magnet switch by adopting a Wheatstone bridge.
The embodiment of the invention also provides a permanent magnet switch driving loop protection system, which comprises:
at least one processor, and,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the permanent magnet switch drive loop protection method.
Specifically, the contents in the above method embodiments are all applicable to the present system embodiment, the functions specifically implemented by the present system embodiment are the same as those in the above method embodiment, and the beneficial effects achieved by the present system embodiment are also the same as those achieved by the above method embodiment.
The system may be implemented in any type of computing platform operatively connected to a suitable connection, including but not limited to a personal computer, mini computer, mainframe, workstation, networked or distributed computing environment, separate or integrated computer platform, or in communication with a charged particle tool or other imaging device, and the like. The data processing flows correspondingly executed by the layers, modules, units and/or platforms included in the inventive system may be implemented in machine readable code stored on a non-transitory storage medium or device, whether removable or integrated into a computing platform, such as a hard disk, an optical read and/or write storage medium, a RAM, a ROM, etc., such that it may be read by a programmable computer, and when the storage medium or device is read by the computer, may be used to configure and operate the computer to perform the procedures described herein. Further, the machine-readable code, or portions thereof, may be transmitted over a wired or wireless network. The invention described herein includes these and other different types of non-transitory computer-readable storage media when such media include instructions or programs that implement the steps described above in conjunction with a microprocessor or other data processor. The invention also includes the computer itself when programmed according to the methods and techniques described herein.
The embodiment of the invention also provides a computer readable storage medium, wherein a computer program is stored on the computer readable storage medium, and when the computer program is executed by a processor, the computer program realizes the protection method for the driving loop of the permanent magnet switch.
In particular, the storage medium stores processor-executable instructions, which when executed by the processor, are configured to perform the steps of the method for processing mutual information according to any one of the above-mentioned method embodiments. For the storage medium, it may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. It can be seen that the contents in the foregoing method embodiments are all applicable to this storage medium embodiment, the functions specifically implemented by this storage medium embodiment are the same as those in the foregoing method embodiments, and the advantageous effects achieved by this storage medium embodiment are also the same as those achieved by the foregoing method embodiments.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention as long as the technical effects of the present invention are achieved by the same means. The invention is capable of other modifications and variations in its technical solution and/or its implementation, within the scope of protection of the invention.
Claims (10)
1. A method for protecting a driving loop of a permanent magnet switch is characterized by comprising the following steps:
measuring an equivalent resistance value of the permanent magnet switch driving loop;
subtracting a set resistance value from the equivalent resistance value to obtain a resistance difference value;
and determining that the resistance difference value is larger than a threshold value, and locking the permanent magnet switch.
2. The permanent magnet switch drive circuit protection method according to claim 1, wherein the permanent magnet switch drive circuit protection method is performed periodically.
3. The method for protecting the driving circuit of the permanent magnet switch according to claim 1, wherein the measuring the equivalent resistance value of the driving circuit of the permanent magnet switch comprises:
and measuring the equivalent resistance value of the driving loop of the permanent magnet switch by adopting a Wheatstone bridge.
4. The protection method for the driving circuit of the permanent magnet switch according to claim 1, further comprising:
and determining that the resistance difference is larger than a threshold value, and carrying out sound and light alarm.
5. The method for protecting the driving circuit of the permanent magnet switch according to claim 1, wherein the measuring the equivalent resistance value of the driving circuit of the permanent magnet switch comprises:
performing capacitance filtering on the permanent magnet switch driving loop;
and measuring the equivalent resistance value of the permanent magnet switch driving loop.
6. The permanent magnet switch drive loop protection method of claim 1, wherein the permanent magnet switch drive loop protection method is performed during an idle period of the permanent magnet switch.
7. A permanent magnet switch drive circuit protection system, comprising:
the measuring module is used for measuring the equivalent resistance value of the permanent magnet switch driving loop;
the difference module is used for subtracting a set resistance value from the equivalent resistance value to obtain a resistance difference value;
and the locking module is used for determining that the resistance difference value is greater than a threshold value and locking the permanent magnet switch.
8. The permanent magnet switch drive loop protection system of claim 7, wherein said measuring an equivalent resistance value of said permanent magnet switch drive loop comprises:
and measuring the equivalent resistance value of the driving loop of the permanent magnet switch by adopting a Wheatstone bridge.
9. A permanent magnet switch drive circuit protection system, comprising:
at least one processor, and,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the permanent magnet switch drive loop protection method of any one of claims 1-6.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out a permanent magnet switch drive loop protection method according to any one of claims 1 to 6.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011022286.5A CN112216566A (en) | 2020-09-25 | 2020-09-25 | Permanent magnet switch drive loop protection method, system and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011022286.5A CN112216566A (en) | 2020-09-25 | 2020-09-25 | Permanent magnet switch drive loop protection method, system and storage medium |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19603411A1 (en) * | 1996-01-31 | 1997-08-14 | Kloeckner Moeller Gmbh | Electrical switching system for LV equipment with short circuit protection e.g. for contactors, protection relays and circuit breakers |
| US20170225632A1 (en) * | 2016-02-10 | 2017-08-10 | Continental Automotive France | Method for controlling the voltage of an apparatus fitted in a motor vehicle |
| CN108886269A (en) * | 2016-04-06 | 2018-11-23 | 蔻荠艾集团有限公司 | Fault monitoring system and method for detecting connectivity faults |
| CN110601147A (en) * | 2019-08-20 | 2019-12-20 | 珠海银河智能电网有限公司 | Permanent magnet driver with state protection and implementation method thereof |
| CN110763990A (en) * | 2019-11-05 | 2020-02-07 | 骆驼集团武汉光谷研发中心有限公司 | Diagnosis method for relay of new energy automobile |
| CN210155215U (en) * | 2019-05-08 | 2020-03-17 | 广东电网有限责任公司 | GIS main loop resistance anomaly detection system |
-
2020
- 2020-09-25 CN CN202011022286.5A patent/CN112216566A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19603411A1 (en) * | 1996-01-31 | 1997-08-14 | Kloeckner Moeller Gmbh | Electrical switching system for LV equipment with short circuit protection e.g. for contactors, protection relays and circuit breakers |
| US20170225632A1 (en) * | 2016-02-10 | 2017-08-10 | Continental Automotive France | Method for controlling the voltage of an apparatus fitted in a motor vehicle |
| CN108886269A (en) * | 2016-04-06 | 2018-11-23 | 蔻荠艾集团有限公司 | Fault monitoring system and method for detecting connectivity faults |
| CN210155215U (en) * | 2019-05-08 | 2020-03-17 | 广东电网有限责任公司 | GIS main loop resistance anomaly detection system |
| CN110601147A (en) * | 2019-08-20 | 2019-12-20 | 珠海银河智能电网有限公司 | Permanent magnet driver with state protection and implementation method thereof |
| CN110763990A (en) * | 2019-11-05 | 2020-02-07 | 骆驼集团武汉光谷研发中心有限公司 | Diagnosis method for relay of new energy automobile |
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Application publication date: 20210112 |