CN116666160A - Electromagnetic switch control method, electromagnetic switch system and inverter - Google Patents

Electromagnetic switch control method, electromagnetic switch system and inverter Download PDF

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Publication number
CN116666160A
CN116666160A CN202310573086.6A CN202310573086A CN116666160A CN 116666160 A CN116666160 A CN 116666160A CN 202310573086 A CN202310573086 A CN 202310573086A CN 116666160 A CN116666160 A CN 116666160A
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CN
China
Prior art keywords
electromagnetic switch
power supply
electromagnetic
environment temperature
controller
Prior art date
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Pending
Application number
CN202310573086.6A
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Chinese (zh)
Inventor
别伟
王鹏
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Sungrow Power Supply Co Ltd
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Sungrow Power Supply Co Ltd
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Filing date
Publication date
Application filed by Sungrow Power Supply Co Ltd filed Critical Sungrow Power Supply Co Ltd
Priority to CN202310573086.6A priority Critical patent/CN116666160A/en
Publication of CN116666160A publication Critical patent/CN116666160A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/12—Ventilating; Cooling; Heating
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • 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
    • H01H2047/025—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 with taking into account of the thermal influences, e.g. change in resistivity of the coil or being adapted to high temperatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Keying Circuit Devices (AREA)

Abstract

The application provides an electromagnetic switch control method, an electromagnetic switch system and an inverter. The condition that the impedance of the electromagnetic switch is increased due to the fact that the working environment is too high is avoided, and the service life of the electromagnetic switch is prolonged; meanwhile, the situation that the main contact of the electromagnetic switch cannot be attracted or cannot be attracted completely and reliably is avoided, and the reliability and safety of the electromagnetic switch are improved.

Description

Electromagnetic switch control method, electromagnetic switch system and inverter
Technical Field
The present application relates to the field of electromagnetic switches, and in particular, to an electromagnetic switch control method, an electromagnetic switch system, and an inverter.
Background
On the main power electrical circuit of a photovoltaic inverter, various relays or contactors are often used, such as a bypass relay on the dc side and a grid-connected relay on the ac side. In practical application, the relay or the contactor can be closed or opened by controlling the power supply of the relay or the contactor coil to be turned off.
The current power supply of the inverter in the market is usually designed according to rated voltage. In the grid-connected process, the internal environment temperature of the inverter increases along with the increase of grid-connected power. However, as the ambient temperature increases and the coil heats itself, the main contact of the relay may fail to engage or fail to engage completely and reliably. When the main contact of the relay cannot be sucked, the inverter cannot be connected with the power at the moment, so that the loss of generated energy is caused, and the reliability of the relay is reduced; when the main contact of the relay cannot be absorbed completely and reliably, the impedance of the main contact of the relay is increased, so that the heating aging of the main contact of the relay is accelerated, the service life of the relay is shortened, even the main contact fails, or the situation of ignition of the inverter occurs, and the reliability and the safety of the relay are reduced.
Therefore, how to improve the reliability and safety of the relay is a problem to be solved in the art.
Disclosure of Invention
In view of the above, the present application provides an electromagnetic switch control method, an electromagnetic switch system, and an inverter to improve reliability and safety of a relay.
In order to achieve the above purpose, the present application provides the following technical solutions:
the first aspect of the application provides an electromagnetic switch control method, comprising the following steps:
acquiring temperature parameters of an electromagnetic switch;
judging whether the working environment temperature of the electromagnetic switch is greater than or equal to a preset value according to the temperature parameter;
if the working environment temperature of the electromagnetic switch is greater than or equal to the preset value, controlling the working environment temperature to be matched with the coil power supply voltage of the electromagnetic switch;
and controlling the electromagnetic switch to be attracted.
Optionally, controlling the working environment temperature to be matched with the coil supply voltage of the electromagnetic switch includes:
and controlling the cooling equipment to cool.
Optionally, after the cooling device is controlled to cool, the step of determining whether the working environment temperature of the electromagnetic switch is greater than or equal to a preset value is performed in a return mode.
Optionally, controlling the working environment temperature to be matched with the coil supply voltage of the electromagnetic switch includes:
controlling a voltage higher than the reference voltage to supply power to the coil.
Optionally, after determining whether the working environment temperature of the electromagnetic switch is greater than or equal to a preset value, the method further includes:
and if the working environment temperature of the electromagnetic switch is smaller than the preset value, controlling the reference voltage to supply power for the coil.
Optionally, after the electromagnetic switch is actuated, the method further includes:
controlling a voltage less than the reference voltage to power the coil.
Optionally, before the acquiring the temperature parameter of the electromagnetic switch or before controlling the electromagnetic switch to be actuated, the method further includes:
judging whether the electromagnetic switch meets the attraction condition or not;
and if the electromagnetic switch meets the suction condition, executing the subsequent steps.
Optionally, if the electromagnetic switch is a grid-connected relay in the inverter, the pull-in condition is a grid-connected condition of the inverter.
The second aspect of the present application also provides an electromagnetic switching system, comprising: the device comprises a controller, a temperature sensor, a first power module, an electromagnetic switch, and a second power module and/or cooling equipment; wherein,,
the controller acquires temperature parameters of the electromagnetic switch through the temperature sensor;
the output end of the first power supply module and the output end of the second power supply module are connected with the power supply end of the electromagnetic switch;
the cooling equipment, the first power supply module and the second power supply module are controlled by the controller;
the power supply voltage of the second power supply module is larger than that of the first power supply module;
the controller is configured to execute the electromagnetic switch control method according to any one of the first aspect.
Optionally, the method further comprises: a third power module;
the output end of the third power supply module is connected with the power supply end of the electromagnetic switch;
the power supply voltage of the third power supply module is smaller than that of the first power supply module;
the third power supply module is controlled by the control device.
The second aspect of the present application also provides an inverter comprising: a master controller, a master circuit and at least one electromagnetic switching system as described in any of the second aspects above; wherein,,
the main circuit and the electromagnetic switch system are controlled by the master controller.
Optionally, the controller of each electromagnetic switching system is integrated in the overall controller.
According to the electromagnetic switch control method, after the temperature parameters of the electromagnetic switch are obtained through the controller, whether the working environment temperature of the electromagnetic switch is larger than or equal to a preset value is judged according to the temperature parameters of the electromagnetic switch, if the working environment temperature of the electromagnetic switch is larger than or equal to the preset value, the working environment temperature is controlled to be matched with the coil power supply voltage of the electromagnetic switch, and then the electromagnetic switch is controlled to be attracted. The condition that the impedance of the electromagnetic switch is increased due to the fact that the working environment is too high is avoided, and the service life of the electromagnetic switch is prolonged; meanwhile, the situation that the main contact of the electromagnetic switch cannot be attracted or cannot be attracted completely and reliably is avoided, and the reliability and safety of the electromagnetic switch are improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following description will briefly explain the embodiments or the drawings to be used in the description of the prior art, and it is obvious that the drawings in the following description are only embodiments of the present application, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flowchart of an electromagnetic switch control method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of an electromagnetic switch system according to an embodiment of the present application;
fig. 3 is another schematic structural diagram of an electromagnetic switch system according to an embodiment of the present application;
FIG. 4 is another flowchart of an electromagnetic switch control method according to an embodiment of the present application;
fig. 5 and fig. 6 are two other flowcharts of an electromagnetic switch control method according to an embodiment of the present application;
fig. 7 is another schematic structural diagram of an electromagnetic switch system according to an embodiment of the present application;
fig. 8 and fig. 9 are two other flowcharts of an electromagnetic switch control method according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the present disclosure, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The application provides an electromagnetic switch control method for improving the reliability and safety of a relay.
The electromagnetic switch control method is applied to a controller of an electromagnetic switch system, as shown in fig. 1, and specifically comprises the following steps:
s101, acquiring temperature parameters of the electromagnetic switch.
It is worth to say that, the controller can collect the temperature parameters of the electromagnetic switch body or the surrounding in real time or periodically through the temperature sensor, and can calculate the temperature parameters of the current electromagnetic switch according to other conditions, the temperature parameters are not particularly limited herein, and the temperature parameters are only required to be within the protection scope of the application according to the specific application environment.
S102, judging whether the working environment temperature of the electromagnetic switch is larger than or equal to a preset value.
In practical application, the controller stores a preset value T of the working environment temperature in advance 1 The operator can also preset the temperature T of the working environment through the external equipment 1 Setting the preset value T 1 The values of (2) are not particularly limited herein, and are all within the scope of the present application, depending on the actual application environment.
The controller judges the working environment temperature T of the electromagnetic switch according to the acquired temperature parameters x Whether or not it is greater than or equal to a preset value T 1 . If greater than or equal to a preset value T 1 Step S103 is performed; if it is smaller than the preset value T 1 Step S104 is performed.
S103, controlling the working environment temperature to be matched with the coil supply voltage of the electromagnetic switch.
When the working environment temperature T of the electromagnetic switch x Greater than or equal to a preset value T 1 When the electromagnetic switch is in the operating state, the controller can change the operating environment temperature T of the electromagnetic switch x So that the working environment temperature T of the electromagnetic switch x Matching with the coil supply voltage; alternatively, the coil supply voltage of the electromagnetic switch can be adjusted to enable the working environment temperature T of the electromagnetic switch x And lineThe ring supply voltage is matched; or, also to the working environment temperature T x The power supply voltage of the coil is adjusted, and the temperature T of the working environment can be avoided as long as the power supply voltage and the power supply voltage are matched x Too high, the main contact point of the electromagnetic switch is unable to be attracted or cannot be attracted completely and reliably.
S104, controlling the electromagnetic switch to be attracted.
When the working environment temperature T of the electromagnetic switch x When the electromagnetic switch is matched with the coil power supply voltage, the electromagnetic switch can be normally attracted. In practical application, if the working environment temperature T of the electromagnetic switch x Less than a preset value T 1 The coil supply voltage of the electromagnetic switch is still the original reference voltage U 1 At this time, the electromagnetic switch can be normally attracted.
According to the electromagnetic switch control method provided by the embodiment, after the temperature parameter of the electromagnetic switch is obtained through the controller, the working environment temperature T of the electromagnetic switch is judged according to the temperature parameter of the electromagnetic switch x Whether or not it is greater than or equal to a preset value T 1 If the working environment temperature T of the electromagnetic switch x Greater than or equal to a preset value T 1 Then control the working environment temperature T x Matching with the coil power supply voltage of the electromagnetic switch, and then controlling the electromagnetic switch to be attracted. Avoiding the electromagnetic switch from working environment temperature T x The situation of impedance increase occurs due to overhigh, so that the service life of the electromagnetic switch is prolonged; meanwhile, the situation that the main contact of the electromagnetic switch cannot be attracted or cannot be attracted completely and reliably is avoided, and the reliability and safety of the electromagnetic switch are improved.
In practical application, the electromagnetic switch system specifically comprises: the device comprises a controller, a temperature sensor, a first power module, an electromagnetic switch, and a second power module and/or cooling equipment; wherein:
as shown in fig. 2, the controller 10 acquires a temperature parameter of the electromagnetic switch 40 through the temperature sensor 20; the first power module 30 and the second power module 50 are both controlled by the controller 10. The output end of the first power module 30 and the output end of the second power module 50 are connected to the power supply end of the electromagnetic switch 40, and the power supply voltage of the second power module 50 is greater than the power supply voltage of the first power module 30.
In practical applications, as shown in fig. 3, the output end of the first power module 30 is connected to the power supply end of the electromagnetic switch 40; the controller 10 obtains the temperature parameter of the electromagnetic switch 40 through the temperature sensor 20, and the first power module 30 and the cooling device 60 are controlled by the controller 10.
On the basis of the above embodiment, the electromagnetic switch control method may, as shown in fig. 4, step S103 includes:
s201, controlling the cooling equipment to cool.
When the operating environment temperature T of the electromagnetic switch 40 x Greater than or equal to a preset value T 1 At this time, the controller 10 controls the temperature T of the working environment of the electromagnetic switch 40 through the cooling device 60 x Cooling down to make the working environment temperature T of the electromagnetic switch 40 x Is matched with the power supply voltage of the coil, avoids the temperature T of the working environment x Too high, resulting in an increase in the impedance of the electromagnetic switch 40.
It should be noted that, as shown in fig. 5, after step S201 is performed, step S102 may be performed again to determine the working environment temperature T of the cooled electromagnetic switch 40 x Whether or not it is smaller than a preset value T 1 。
In practical applications, a fan or a liquid cooling device can be used as the cooling device 60 to cool the working environment temperature T of the electromagnetic switch 40 x The temperature is reduced, the practical application is not limited to the above, and the temperature is required to be reduced according to the specific application environment and is within the protection scope of the application.
Alternatively, as shown in fig. 6, the electromagnetic switch control method may further include:
s301, controlling a voltage higher than a reference voltage to supply power for the coil.
When the operating environment temperature T of the electromagnetic switch 40 x Greater than or equal to a preset value T 1 When the controller 10 can output a voltage U higher than the reference voltage by controlling the second power module 50 2 Is a wire in the electromagnetic switch 40The coil is powered such that the coil supply voltage is in accordance with the operating environment temperature T of the electromagnetic switch 40 x And the situation that the main contact point cannot be attracted or cannot be attracted completely and reliably due to the fact that the impedance of the electromagnetic switch 40 is too high is avoided.
In the electromagnetic switch control method provided in this embodiment, the operating environment temperature T of the electromagnetic switch 40 x Greater than or equal to a preset value T 1 At this time, the current working environment can be cooled by the cooling device 60 to make the working environment temperature T of the electromagnetic switch 40 x In response to the coil supply voltage, a voltage U higher than the reference voltage can be output via the second power module 50 2 The electromagnetic switch 40 is powered so that the coil supply voltage and the operating environment temperature T of the electromagnetic switch 40 x The situation that the main contact of the electromagnetic switch 40 cannot be attracted or cannot be attracted completely and reliably can be avoided, and the reliability and safety of the electromagnetic switch 40 are improved.
On the basis of the above embodiment, optionally, as shown in fig. 8, the electromagnetic switch control method further includes, after S104, controlling the electromagnetic switch to be actuated:
s401, controlling a voltage smaller than the reference voltage to supply power for the coil.
In practical application, as shown in fig. 7 (which is shown on the basis of fig. 3), the electromagnetic switch system further includes: a third power module 70; the output end of the third power module 70 and the output end of the first power module 30 are both connected with the power supply end of the electromagnetic switch 40, and the third power module 70 is controlled by the control device, and the power supply voltage of the third power module 70 is smaller than the power supply voltage of the first power module 30.
Referring to fig. 7, after the electromagnetic switch 40 is turned on, the controller 10 outputs a voltage U less than the reference voltage by controlling the third power module 70 3 To power the coil of the electromagnetic switch 40.
In the electromagnetic switch control method provided in this embodiment, after the electromagnetic switch 40 is turned on, a voltage U smaller than the reference voltage is output by controlling the third power module 70 3 ToThe coil of the electromagnetic switch 40 is supplied with power, so that the coil loss is further reduced and the service life of the electromagnetic switch 40 is prolonged while the reliability of the electromagnetic switch 40 is maintained.
On the basis of the above embodiment, optionally, the electromagnetic switch control method further includes:
s501, judging whether the electromagnetic switch meets the actuation condition.
If the electromagnetic switch 40 satisfies the engaging condition, the subsequent steps are performed; if not, the process continues to step S501.
In practical applications, step S501 may be disposed before step S101 or before step S104, and fig. 9 is taken as an example for illustration, and step S501 is disposed before step S104. When the electromagnetic switch 40 is a grid-connected relay in an inverter, then the pull-in condition is a grid-connected condition of the inverter. The practical application is not limited to this, and can be determined according to the specific application environment, and the practical application is within the protection scope of the application.
According to the electromagnetic switch control method provided by the embodiment, the closing condition of the electromagnetic switch 40 is judged to ensure that the electromagnetic switch 40 is attracted under the condition that the closing condition is met, so that the safety and reliability of the electromagnetic switch 40 are improved.
Another embodiment of the present application also provides an electromagnetic switching system, including: a controller 10, a temperature sensor 20, a first power module 30, an electromagnetic switch 40, and a second power module 50 and/or a cooling device 60; wherein:
as shown in fig. 2, the controller 10 acquires a temperature parameter of the electromagnetic switch 40 through the temperature sensor 20; the first power module 30 and the second power module 50 are controlled by the controller 10, and the controller 10 is configured to execute the electromagnetic switch control method according to any one of the above embodiments. The output end of the first power module 30 and the output end of the second power module 50 are connected to the power supply end of the electromagnetic switch 40, and the power supply voltage of the second power module 50 is greater than the power supply voltage of the first power module 30.
In practical applications, as shown in fig. 3, the output end of the first power module 30 is connected to the power supply end of the electromagnetic switch 40; the controller 10 acquires the temperature parameter of the electromagnetic switch 40 through the temperature sensor 20; the first power module 30 and the cooling device 60 are both controlled by the controller 10, and the controller 10 is configured to execute the electromagnetic switch control method according to any of the above embodiments.
It should be noted that, in the electromagnetic switch system, the second power module 50 and the cooling device 60 may be provided at the same time, so that the controller 10 can control the working environment temperature T of the electromagnetic switch 40 through the second power module 50 and the cooling device 60 x And the coil supply voltage.
In practical applications, the electromagnetic switch 40 may be various electromagnetic switch devices capable of being attracted by a coil, such as a relay or a contactor, and is not limited herein, and it is within the scope of the present application depending on the specific application environment.
Optionally, as shown in fig. 7, the electromagnetic switch system further includes: a third power module 70; wherein, the output end of the third power module 70 is connected with the power supply end of the electromagnetic switch 40; and the third power module 70 is controlled by the control device. In practical applications, the power supply voltage of the third power module 70 is smaller than the power supply voltage of the first power module 30.
The electromagnetic switch system provided in this embodiment executes the electromagnetic switch 40 control method described in any of the above embodiments by the controller 10 to control the electromagnetic switch 40 at the operating environment temperature T of the electromagnetic switch 40 x Greater than or equal to a preset value T 1 In this case, the second power module 50 and/or the cooling device 60 can be controlled to make the operating environment temperature T of the electromagnetic switch 40 x Matching the coil supply voltage of the electromagnetic switch 40. Avoiding the electromagnetic switch 40 from being due to the operating environment temperature T x Too high, with increased impedance, extending the useful life of the electromagnetic switch 40; meanwhile, the situation that the main contact of the electromagnetic switch 40 cannot be attracted or cannot be attracted completely and reliably is avoided, and the reliability and safety of the electromagnetic switch 40 are improved.
The voltage value of the existing inverter power supply is designed according to the rated voltage of the manufacturer relay, and the situation that the relay works at high temperature is not considered. When the inverter works, the internal environment temperature of the inverter increases along with the increase of the grid-connected power, the resistance value of the grid-connected relay is increased due to the increase of the internal environment temperature, and meanwhile, the coil voltage or current required by the full suction of the grid-connected relay is much higher than that at normal temperature or low temperature.
In practical application, after the short-time standby of the inverter occurs in the grid-connected process, if the inverter still meets the grid-connected condition at this moment, the grid-connected condition still continues after self-checking, but the voltage value of the power supply of the inverter still is rated voltage at this moment, but the rated voltage is lower than the coil voltage required by the complete suction of the current relay, so that the relay is extremely easy to occur and can not be completely and reliably sucked at this moment, damage to the relay body can be caused, the inverter is made to fail, and even the inverter is caused to generate fire.
Accordingly, another embodiment of the present application also provides an inverter including: a master controller, a master circuit and at least one electromagnetic switching system as described in any one of the embodiments above; the main circuit and the electromagnetic switch system are controlled by the master controller.
It should be noted that the controller 10 of each electromagnetic switching system may also be integrated into the overall controller, so as to implement a corresponding electromagnetic switching control method through the overall controller. In addition, the electromagnetic switch 40 in the electromagnetic switching system may be used as a bypass relay on the dc side of the inverter or a grid-connected relay on the ac side of the inverter, and may also be applied to the main circuit of the inverter; and the electromagnetic switch 40 may be applied to the outside of the inverter, or to the equipment side of the non-inverter. The practical application is not limited to this, and can be determined according to the specific application environment, and the practical application is within the protection scope of the application.
The inverter provided in this embodiment employs the electromagnetic switch system according to any one of the above embodiments, so that the electromagnetic switch 40 is operated at the operating environment temperature T x When the voltage is too high, the electromagnetic switch can still be reliably attracted, the service life of the electromagnetic switch 40 is prolonged, the failure occurrence rate of the inverter is reduced, and the generated energy of the inverter is effectively improved; at the same time avoidThe main contact of the electromagnetic switch 40 is not attracted or cannot be attracted completely reliably, so that the reliability and safety of the inverter are improved.
The same and similar parts of the embodiments in this specification are all mutually referred to, and each embodiment focuses on the differences from the other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends 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 present application.
The features described in the various embodiments of the present disclosure may be interchanged or combined with one another in the description of the disclosed embodiments to enable those skilled in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (12)

1. An electromagnetic switch control method, characterized by comprising:
acquiring temperature parameters of an electromagnetic switch;
judging whether the working environment temperature of the electromagnetic switch is greater than or equal to a preset value according to the temperature parameter;
if the working environment temperature of the electromagnetic switch is greater than or equal to the preset value, controlling the working environment temperature to be matched with the coil power supply voltage of the electromagnetic switch;
and controlling the electromagnetic switch to be attracted.
2. The method of claim 1, wherein controlling the operating environment temperature to match a coil supply voltage of the electromagnetic switch comprises:
and controlling the cooling equipment to cool.
3. The electromagnetic switch control method according to claim 2, wherein the step of determining whether the operating environment temperature of the electromagnetic switch is equal to or higher than a preset value is performed in return after the cooling device is controlled to cool.
4. The method of claim 1, wherein controlling the operating environment temperature to match a coil supply voltage of the electromagnetic switch comprises:
controlling a voltage higher than the reference voltage to supply power to the coil.
5. The electromagnetic switch control method according to claim 1, characterized by further comprising, after determining whether the operating environment temperature of the electromagnetic switch is equal to or higher than a preset value:
and if the working environment temperature of the electromagnetic switch is smaller than the preset value, controlling the reference voltage to supply power for the coil.
6. The electromagnetic switch control method according to any one of claims 1 to 5, characterized by further comprising, after the electromagnetic switch is actuated:
controlling a voltage less than the reference voltage to power the coil.
7. The electromagnetic switch control method according to any one of claims 1 to 5, characterized by further comprising, before the acquisition of the temperature parameter of the electromagnetic switch or before controlling the actuation of the electromagnetic switch:
judging whether the electromagnetic switch meets the attraction condition or not;
and if the electromagnetic switch meets the suction condition, executing the subsequent steps.
8. The electromagnetic switch control method according to claim 7, wherein if the electromagnetic switch is a grid-connected relay in an inverter, the pull-in condition is a grid-connected condition of the inverter.
9. An electromagnetic switching system, comprising: the device comprises a controller, a temperature sensor, a first power module, an electromagnetic switch, and a second power module and/or cooling equipment; wherein,,
the controller acquires temperature parameters of the electromagnetic switch through the temperature sensor;
the output end of the first power supply module and the output end of the second power supply module are connected with the power supply end of the electromagnetic switch;
the cooling equipment, the first power supply module and the second power supply module are controlled by the controller;
the power supply voltage of the second power supply module is larger than that of the first power supply module;
the controller is configured to execute the electromagnetic switch control method according to any one of claims 1 to 8.
10. The electromagnetic switching system of claim 9, further comprising: a third power module;
the output end of the third power supply module is connected with the power supply end of the electromagnetic switch;
the power supply voltage of the third power supply module is smaller than that of the first power supply module;
the third power supply module is controlled by the control device.
11. An inverter, comprising: a master controller, a master circuit and at least one electromagnetic switching system according to claim 9 or 10; wherein,,
the main circuit and the electromagnetic switch system are controlled by the master controller.
12. The inverter of claim 11, wherein the controller of each of the electromagnetic switching systems is integrated within the overall controller.
CN202310573086.6A 2023-05-17 2023-05-17 Electromagnetic switch control method, electromagnetic switch system and inverter Pending CN116666160A (en)

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Application Number Priority Date Filing Date Title
CN202310573086.6A CN116666160A (en) 2023-05-17 2023-05-17 Electromagnetic switch control method, electromagnetic switch system and inverter

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