CN215154052U - On-off control loop and switch group - Google Patents
On-off control loop and switch group Download PDFInfo
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- CN215154052U CN215154052U CN202120532819.8U CN202120532819U CN215154052U CN 215154052 U CN215154052 U CN 215154052U CN 202120532819 U CN202120532819 U CN 202120532819U CN 215154052 U CN215154052 U CN 215154052U
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/12—Electric charging stations
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Abstract
The utility model discloses an on-off control return circuit and switch block, if first relay is high voltage relay, the second relay is low voltage relay, and the controller triggers the second relay earlier closed at the closed in-process of control relay, and first relay is closed again. When the relay is closed, the second relay is closed firstly, no loop is formed at the moment, no pressure difference exists between contacts, and no loading action exists, so that potential safety hazards do not exist. The controller triggers the first relay to be disconnected firstly and the second relay to be disconnected secondly in the process of controlling the relays to be disconnected. The contact of the second relay can not be carried with load and the first relay can be carried with load, and the first relay can work under the high-voltage condition, so that the potential safety hazard is avoided. Through the action logic of controlling first relay and second relay, improve battery charging outfit's flexibility and security. In addition, the power distribution is not carried out in a mode of completely using a high-voltage relay, so that the conditions of high cost and inconvenient installation are avoided.
Description
Technical Field
The utility model relates to a relay technical field, more specifically say, relate to an on-off control return circuit and switch block.
Background
Along with fill the development in electric pile market, the electric pile that fills that has the power distribution function in the market is more and more, can effectual improvement battery charging outfit in the utilization ratio and the output efficiency of the module that charges through power distribution, improves battery charging outfit's use flexibility.
The power distribution mode of the existing charging pile is usually a mode of a switch group, the mode of the switch group is divided into two modes, one mode is that the power distribution is carried out in a mode of adopting a high-voltage relay, and the high-voltage relay is high in cost and large in size, so that the cost is high, and the installation is inconvenient. Another power distribution mode is to use a low-voltage relay to distribute power, and since the charging voltage of the charging pile is high voltage, certain potential safety hazards can exist when the low-voltage relay is directly used for distributing power, such as improper operation, abnormal control, interference on charging equipment and the like, so that the charging equipment is damaged.
Therefore, the existing power distribution mode of the charging pile has the problems of high cost, inconvenient installation and potential safety hazard.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model discloses an on-off control return circuit and switch block through the action logic of controlling first relay and second relay, improves battery charging outfit's flexibility and security. In addition, the power distribution is not carried out in a mode of completely using a high-voltage relay, so that the conditions of high cost and inconvenient installation are avoided.
In order to achieve the above object, the utility model discloses a technical scheme as follows:
the utility model discloses an on-off control loop in the first aspect, which comprises a controller, a first relay and a second relay;
the first end of the main contact of the first relay is connected with the positive input end of the direct-current high voltage, and the second end of the main contact of the first relay is connected with the positive output end of the direct-current high voltage;
the first end of the main contact of the second relay is connected with the negative input end of the direct-current high voltage, and the second end of the main contact of the second relay is connected with the negative output end of the direct-current high voltage;
if the first relay is a high-voltage relay and the second relay is a low-voltage relay, the controller triggers the second relay to be closed first and then to be closed again in the process of controlling the first relay and the second relay to be closed; in the process of controlling the first relay and the second relay to be disconnected, the controller triggers the first relay to be disconnected first, and then the second relay is disconnected; if the first relay is a low-voltage relay, the second relay is a high-voltage relay, the controller triggers the first relay to be closed first and the second relay to be closed second in the process of controlling the first relay and the second relay to be closed, and the controller triggers the second relay to be opened first and the first relay to be opened second in the process of controlling the first relay and the second relay to be opened.
Preferably, the method further comprises the following steps: a detection device;
the detection device comprises 2 auxiliary contacts, wherein 1 auxiliary contact is electrically isolated from the main contact of the first relay and has a linkage relation, and the other 1 auxiliary contact is electrically isolated from the main contact of the second relay and has a linkage relation.
Preferably, the method further comprises the following steps: a first detection circuit;
the first end of the first detection circuit is connected with the first end of the main contact of the first relay, and the second end of the first detection circuit is connected with the second end of the main contact of the first relay.
Preferably, the first detection circuit comprises a first detection power supply, a first optical coupler, a first pull-up resistor, a first current-limiting resistor, a first direct-current power supply, a first control relay and a first anti-reverse diode;
the first end of the first optocoupler is connected with the first end of the first pull-up resistor, the second end of the first optocoupler is connected with the detection device, the third end of the first optocoupler is connected with the first end of the first current-limiting resistor, and the fourth end of the first optocoupler is connected with the first end of the main contact of the first relay;
the second end of the first pull-up resistor is connected with the first direct current power supply;
the second end of the first current-limiting resistor is connected with the anode of the first detection power supply;
the first end of the first control relay is connected with the cathode of the first anti-reverse diode, and the second end of the first control relay is connected with the cathode of the first detection power supply;
and the anode of the first anti-reverse diode is connected with the second end of the main contact of the first relay.
Preferably, the method further comprises the following steps: a second detection circuit;
and the first end of the second detection circuit is connected with the first end of the main contact of the second relay, and the second end of the second detection circuit is connected with the second end of the main contact of the second relay.
Preferably, the second detection circuit comprises a second detection power supply, a second optocoupler, a second pull-up resistor, a second current-limiting resistor, a second direct-current power supply, a second control relay and a second anti-reverse diode;
the first end of the second optocoupler is connected with the first end of the second pull-up resistor, the second end of the second optocoupler is connected with the detection device, the third end of the second optocoupler is connected with the second end of the second current-limiting resistor, and the fourth end of the second optocoupler is connected with the second end of the main contact of the second relay;
the second end of the second pull-up resistor is connected with the second direct current power supply;
the first end of the second current-limiting resistor is connected with the anode of the second detection power supply;
the first end of the second control relay is connected with the cathode of the second anti-reverse diode, and the second end of the second control relay is connected with the cathode of the second detection power supply;
and the anode of the second anti-reverse diode is connected with the first end of the main contact of the second relay.
The utility model discloses a switch block is disclosed in the second aspect, switch block includes that the first aspect is arbitrary the on-off control circuit.
According to the technical scheme, if the first relay is the high-voltage relay and the second relay is the low-voltage relay, the controller triggers the second relay to be firstly closed and the first relay to be closed in the relay closing process. According to the control mode, the second relay is closed firstly when the second relay is closed, no loop is formed at the moment, no pressure difference exists between contacts, no loading action exists, and therefore potential safety hazards do not exist. The controller triggers the first relay to be disconnected firstly and the second relay to be disconnected secondly in the process of controlling the relays to be disconnected. In the control mode, the contact of the second relay does not act with load, the first relay acts with load, and the first relay can work under the high-voltage condition, so that potential safety hazards do not exist. Through the action logic of controlling first relay and second relay, improve battery charging outfit's flexibility and security. In addition, the power distribution is not carried out in a mode of completely using a high-voltage relay, so that the conditions of high cost and inconvenient installation are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram of an on-off control loop disclosed by the present invention;
fig. 2 is a schematic diagram illustrating a process of controlling the first relay and the second relay to be closed and opened by the controller according to the present invention;
fig. 3 is a schematic structural diagram of a detection device of an on-off control loop disclosed by the present invention;
fig. 4 is a schematic structural diagram of a peripheral detection circuit of an on-off control loop disclosed by the present invention;
fig. 5 is a schematic structural diagram of a first detection circuit of an on-off control loop disclosed by the present invention;
fig. 6 is a schematic structural diagram of a second detection circuit of an on-off control loop disclosed by the present invention;
fig. 7 is a schematic diagram of a control logic of an on-off control loop according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In this application, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Known by the background art, the power distribution mode of the existing charging pile has the problems of high cost, inconvenient installation and potential safety hazard.
In order to solve the problem, the utility model discloses an on-off control circuit and switch block through the action logic of controlling first relay and second relay, improves battery charging outfit's flexibility and security. In addition, the power distribution is not carried out in a mode of completely using a high-voltage relay, so that the conditions of high cost and inconvenient installation are avoided.
The specific implementation is specifically illustrated by the following examples.
As shown in fig. 1, for the utility model discloses a schematic diagram of an on-off control loop, this on-off control loop includes controller 11, first relay 12 and second relay 13.
The connection relationship of the controller 11, the first relay 12, and the second relay 13 is as follows:
a first end of the main contact of the first relay 12 is connected to a positive input end of the dc high voltage, and a second end of the main contact of the first relay 12 is connected to a positive output end of the dc high voltage.
The positive input end of the direct-current high voltage is the positive input of the bus, and the positive output end of the direct-current high voltage is the positive output of the bus.
A first end of the main contact of the second relay 13 is connected to the negative input terminal of the dc high voltage, and a second end of the main contact of the second relay 13 is connected to the negative output terminal of the dc high voltage.
The negative input end of the direct-current high voltage is the negative output of the bus, and the negative output end of the direct-current high voltage is the negative output of the bus.
A first control terminal of the controller 11 is connected to a control terminal of the first relay 12, and a second control terminal is connected to a control terminal of the second relay 13.
The controller 11 controls the first relay 12 and the second relay 13 to be closed and opened.
Fig. 2 is a schematic diagram illustrating a controller controlling a closing process and an opening process of a first relay and a second relay.
In fig. 2, K1 denotes the first relay 12, and K2 denotes the second relay 13.
The control logic of the controller 11 for controlling the on and off of the first relay 12 and the second relay 13 is as follows:
if the first relay 12 is a high-voltage relay and the second relay 13 is a low-voltage relay, the controller 11 controls the first relay 12 and the second relay 13 to be closed and opened as follows:
in the process that the controller 11 controls the first relay 12 and the second relay 13 to be closed, the controller 11 sends a closing signal to the second relay 13 and the first relay 12 in advance to trigger the second relay 13 to be closed in advance, and then the first relay 12 is closed.
In the closing process, the controller 11 closes the second relay 13 first, at this time, a loop is not formed, no pressure difference exists between contacts, and no loading action is performed, so that the second relay 13 has no potential safety hazard of damage.
The controller 11 controls the first relay 12 and the second relay 13 to be switched off as follows:
the controller 11 sends a turn-off signal to the first relay 12 and the second relay 13 in advance, and triggers the first relay 12 to turn off first and the second relay 13 to turn off again.
In the disconnection process, the second relay 13 is disconnected after the controller 11, and the loop is disconnected at the moment, and similarly, the contact of the second relay 13 does not have the loading action, and the second relay 13 does not have the potential safety hazard of damage.
If the first relay 12 is a low-voltage relay and the second relay is a high-voltage relay, the controller 11 controls the first relay 12 and the second relay 13 to be closed and opened as follows:
in the process that the controller 11 controls the first relay 12 and the second relay 13 to be closed, the controller 11 sends a closing signal to the first relay 12 and the second relay 13 in advance to trigger the first relay 12 to be closed first and the second relay 13 to be closed again.
In the closing process, the controller 11 closes the first relay 12 first, at this time, a loop is not formed, no pressure difference exists between contacts, and no loading action is performed, so that the first relay 12 does not have the potential safety hazard of damage.
The controller 11 controls the first relay 12 and the second relay 13 to be switched off as follows:
the controller 11 sends a turn-off signal to the second relay 13 and the first relay 12 in advance, and triggers the second relay 13 to turn off first and the first relay 12 to turn off again.
In the disconnection process, the controller 11 disconnects the first relay 12, and the loop is disconnected at the moment, and similarly, the contact of the first relay 12 does not carry load, and the first relay 12 does not have the potential safety hazard of damage.
In the process of closing and opening, the high-voltage relay is in loading action, and the high-voltage relay can work in a high-voltage occasion, so that potential safety hazards do not exist.
Compared with the equipment using the high-voltage relay, the high-voltage relay is inconvenient to install because the volume of the high-voltage relay is larger than that of the low-voltage relay. This scheme is through the action logic of control first relay and second relay for battery charging outfit's overall cost reduces by a wide margin, and simple to operate distribution mode is more nimble.
Compared with the equipment which totally uses the low-voltage relay, the control using the low-voltage relay has certain potential safety hazard (the charging voltage is in the range of direct current 200V-750V, and the working voltage of the low-voltage relay is generally direct current 30V) because the charging voltage is higher. According to the scheme, the reliability of the charging equipment is greatly improved by controlling the action logics of the first relay and the second relay.
The embodiment of the utility model provides an in, if first relay is high voltage relay, the second relay is low voltage relay, and controller control relay is closed in-process, triggers the second relay and closes earlier, and first relay is closed again. According to the control mode, the second relay is closed firstly when the second relay is closed, no loop is formed at the moment, no pressure difference exists between contacts, no loading action exists, and therefore potential safety hazards do not exist. The controller triggers the first relay to be disconnected firstly and the second relay to be disconnected secondly in the process of controlling the relays to be disconnected. In the control mode, the contact of the second relay does not act with load, the first relay acts with load, and the first relay can work under the high-voltage condition, so that potential safety hazards do not exist. Through the action logic of controlling first relay and second relay, improve battery charging outfit's flexibility and security. In addition, the power distribution is not carried out in a mode of completely using a high-voltage relay, so that the conditions of high cost and inconvenient installation are avoided.
In order to further improve the reliability of the on-off control circuit, the states of the first relay 12 and the second relay 13, including the open state and the closed state, are detected while the first relay 12 and the low voltage controller 13 are controlled to be closed or opened.
If the first relay 12 and the second relay 13 have auxiliary contacts, the states of the first relay 12 and the second relay 13 are detected by a detection device.
As shown in fig. 3, for the utility model discloses a detection device in on-off control return circuit's structural schematic, this detection device includes 2 auxiliary contacts, and 1 auxiliary contact is with the main contact electrical isolation of first relay 12 and have the linkage relation, and 1 auxiliary contact is with the main contact electrical isolation of second relay 13 and have the linkage relation in addition.
In fig. 3, the state detection of the first relay 12 is detected by the form of an auxiliary contact 31, which is a set of contacts linked with the main contact of the first relay 12.
The state of the auxiliary contact 31 is identical to or opposite to the main contact of the first relay 12, the auxiliary contact 31 is used for detecting the state of the main contact of the first relay 12, and the auxiliary contact 31 is electrically isolated from the main contact of the first relay 12, thereby satisfying the safety requirement.
The detection of the state of the second relay 13 is performed by means of an auxiliary contact 32, which is a set of contacts that are linked with the main contacts of the high-low relay 13.
The state of the auxiliary contact 32 is identical to or opposite to the main contact of the second relay 13, the auxiliary contact 32 is used for detecting the state of the main contact of the second relay 13, and the auxiliary contact 32 is electrically isolated from the main contact of the second relay 13, thereby meeting the safety requirement.
The embodiment of the utility model provides an in, detect the state at the both ends of the main contact of first relay 12 and the state at the both ends of the main contact of second relay 13 through detection device to ensure electrical equipment's security and reliability.
If the first relay 12 and the second relay 13 do not have auxiliary contacts, the states of the first relay 12 and the second relay 13 are detected in the form of a peripheral circuit.
As shown in fig. 4, for the utility model discloses a peripheral detection circuitry's of on-off control return circuit structure schematic diagram, this peripheral detection circuitry includes first detection circuitry and second detection circuitry.
A first end of the first detection circuit is connected to a first end of the main contact of the first relay 12 and a second end is connected to a second end of the main contact of the first relay 12.
A first end of the second detection circuit is connected to a first end of the main contact of the second relay 13, and a second end is connected to a second end of the main contact of the second relay 13.
The embodiment of the utility model provides an in, detect and detect the state at the both ends of the main contact of second relay through the state at the both ends of first detection circuitry to the main contact of first relay to ensure electrical equipment's security and reliability.
Referring to fig. 5, in order to illustrate a structural schematic diagram of a first detection circuit of an on-off control loop according to the present invention, on the basis of fig. 4 in the above embodiment, the first detection circuit includes a first detection power supply 51, a first optocoupler 52, a first pull-up resistor 53, a first current-limiting resistor 54, a first dc power supply 55, a first control relay 56, and a first anti-reverse diode 57.
The connection relationship of the first detection power supply 51, the first optocoupler 52, the first pull-up resistor 53, the first current limiting resistor 54, the first direct current power supply 55, the first control relay 56 and the first anti-reverse diode 57 is as follows:
a first terminal of the first optocoupler 52 is connected to a first terminal of a first pull-up resistor 53, a second terminal is connected to the detection device, a third terminal is connected to a first terminal of a first current limiting resistor 54, and a fourth terminal is connected to a first terminal of the main contact of the first relay 12.
A second terminal of the first pull-up resistor 53 is connected to a first direct current power supply 55.
A second terminal of the first current limiting resistor 54 is connected to the positive electrode of the first detection power supply 51.
The first control relay 56 has a first terminal connected to the cathode of the first anti-reverse diode 57 and a second terminal connected to the cathode of the first detection power supply 51.
The anode of the first anti-reverse diode 57 is connected to the second end of the main contact of the first relay 12.
The embodiment of the utility model provides an in, detect the state at the both ends of the main contact of first relay through first detection circuitry to ensure electrical equipment's security and reliability.
Referring to fig. 6, in order to illustrate a structural schematic diagram of a second detection circuit of an on-off control loop of the present invention, on the basis of fig. 4 in the above embodiment, the second detection circuit includes a second detection power source 61, a second optical coupler 62, a second pull-up resistor 63, a second current limiting resistor 64, a second dc power source 65, a second control relay 66 and a second anti-reverse diode 67.
The connection relations of the second detection power supply 61, the second optocoupler 62, the second pull-up resistor 63, the second current limiting resistor 64, the second direct current power supply 65, the second control relay 66 and the second anti-reverse diode 67 are as follows:
a first end of the second optocoupler 62 is connected to a first end of a second pull-up resistor 63, a second end is connected to the detection device, a third end is connected to a second end of a second current limiting resistor 64, and a fourth end is connected to a second end of the main contact of the second relay 13.
A second terminal of the second pull-up resistor 63 is connected to a second dc power supply 65.
A first terminal of the second current limiting resistor 64 is connected to the positive electrode of the second detection power supply 61.
The second control relay 66 has a first terminal connected to the cathode of the second anti-reverse diode 67 and a second terminal connected to the cathode of the second detection power supply 61.
The anode of the second anti-reverse diode 67 is connected to a first end of the main contact of the second relay 13.
The embodiment of the utility model provides an in, detect the state at the both ends of the main contact of second relay through second detection circuitry to ensure electrical equipment's security and reliability.
As shown in fig. 7, the present invention discloses a schematic diagram of the control logic of the on-off control loop.
In fig. 7, the K1 control signal is a control signal of the first relay 12, the K1 detection signal is a detection signal of the first relay 12, the K2 control signal is a control signal of the second relay 13, and the K2 detection signal is a detection signal of the second relay 13.
When the first relay 12 is a high-voltage relay and the second relay 13 is a low-voltage relay, the control flow of the on-off control loop is as shown in T0-T8:
t0: it is detected whether the first relay 12 is in the off state.
When the first relay 12 is in the off state, T1 is executed.
T1: the second relay 13 is controlled to close.
T2: it is detected whether the second relay 13 is in the closed state.
T3: the first relay 12 is controlled to close.
T4: it is detected whether the first relay 12 is in the closed state.
When the first relay 12 is in the closed state, T5 is executed.
T1-T4 is the closing process of the first relay 12 and the second relay 13.
T5: the second relay 13 is controlled to be opened.
T6: it is detected whether the second relay 13 is in the off state.
T7: the first relay 12 is controlled to be opened.
T8: it is detected whether the first relay 12 is in the off state.
T5-T8 is the opening process of the second relay 13 and the first relay 12.
When the first relay 12 or the second relay 13 is detected to be abnormal, the switch group is judged to be in a fault state, and does not execute downwards any more and generates error reporting information.
When the first relay 12 is a low-voltage relay and the second relay 13 is a high-voltage relay, the control flow of the on-off control loop is as shown in a 0-A8:
a0: it is detected whether the second relay 13 is in the off state.
When the second relay 13 is in the off state, a1 is executed.
A1: the first relay 12 is controlled to close.
A2: it is detected whether the first relay 12 is in the closed state.
A3: the second relay 13 is controlled to close.
A4: it is detected whether the second relay 13 is in the closed state.
When the second relay 13 is in the closed state, a5 is executed.
A1-a4 is the closing process of the first relay 12 and the second relay 13.
A5: the first relay 12 is controlled to be opened.
A6: it is detected whether the first relay 12 is in the off state.
A7: the second relay 13 is controlled to be opened.
A8: it is detected whether the second relay 13 is in the off state.
A5-A8 is the opening process of the second relay 13 and the first relay 12.
When the first relay 12 or the second relay 13 is detected to be abnormal, the switch group is judged to be in a fault state, and does not execute downwards any more and generates error reporting information.
The embodiment of the utility model provides an in, the controller is at the closed in-process of first relay of control and second relay, detects the state of first relay and second relay to the action logic of first relay of control and second relay, through the action logic of controlling first relay and second relay, improves battery charging outfit's flexibility and security. When the abnormal state of the first relay or the second relay is detected, the switch group judges to be in a fault state, the switch group does not execute downwards any more and generates error reporting information, and therefore the purpose of prompting the fault states of the first relay and the second relay is achieved.
The embodiment of the utility model provides a switch block is still disclosed, and this switch block includes arbitrary on-off control circuit in above-mentioned embodiment.
In the above description of the disclosed embodiments, features described in various embodiments in this specification can be substituted for or combined with each other to enable those skilled in the art to make or use the present application. The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The invention is not limited to the embodiments described herein, but is capable of other embodiments according to the invention, and may be used in various other applications, including, but not limited to, industrial, or industrial. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still fall within the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.
Claims (7)
1. An on-off control loop is characterized by comprising a controller, a first relay and a second relay;
the first end of the main contact of the first relay is connected with the positive input end of the direct-current high voltage, and the second end of the main contact of the first relay is connected with the positive output end of the direct-current high voltage;
the first end of the main contact of the second relay is connected with the negative input end of the direct-current high voltage, and the second end of the main contact of the second relay is connected with the negative output end of the direct-current high voltage;
if the first relay is a high-voltage relay and the second relay is a low-voltage relay, the controller triggers the second relay to be closed first and then to be closed again in the process of controlling the first relay and the second relay to be closed; in the process of controlling the first relay and the second relay to be disconnected, the controller triggers the first relay to be disconnected first, and then the second relay is disconnected; if the first relay is a low-voltage relay, the second relay is a high-voltage relay, the controller triggers the first relay to be closed first and the second relay to be closed second in the process of controlling the first relay and the second relay to be closed, and the controller triggers the second relay to be opened first and the first relay to be opened second in the process of controlling the first relay and the second relay to be opened.
2. The on-off control circuit of claim 1, further comprising: a detection device;
the detection device comprises 2 auxiliary contacts, wherein 1 auxiliary contact is electrically isolated from the main contact of the first relay and has a linkage relation, and the other 1 auxiliary contact is electrically isolated from the main contact of the second relay and has a linkage relation.
3. The on-off control circuit of claim 2, further comprising: a first detection circuit;
the first end of the first detection circuit is connected with the first end of the main contact of the first relay, and the second end of the first detection circuit is connected with the second end of the main contact of the first relay.
4. The on-off control loop of claim 3, wherein the first detection circuit comprises a first detection power supply, a first optocoupler, a first pull-up resistor, a first current-limiting resistor, a first direct-current power supply, a first control relay and a first anti-reverse diode;
the first end of the first optocoupler is connected with the first end of the first pull-up resistor, the second end of the first optocoupler is connected with the detection device, the third end of the first optocoupler is connected with the first end of the first current-limiting resistor, and the fourth end of the first optocoupler is connected with the first end of the main contact of the first relay;
the second end of the first pull-up resistor is connected with the first direct current power supply;
the second end of the first current-limiting resistor is connected with the anode of the first detection power supply;
the first end of the first control relay is connected with the cathode of the first anti-reverse diode, and the second end of the first control relay is connected with the cathode of the first detection power supply;
and the anode of the first anti-reverse diode is connected with the second end of the main contact of the first relay.
5. The on-off control circuit of claim 2, further comprising: a second detection circuit;
and the first end of the second detection circuit is connected with the first end of the main contact of the second relay, and the second end of the second detection circuit is connected with the second end of the main contact of the second relay.
6. The on-off control loop of claim 5, wherein the second detection circuit comprises a second detection power supply, a second optocoupler, a second pull-up resistor, a second current-limiting resistor, a second direct-current power supply, a second control relay and a second anti-reverse diode;
the first end of the second optocoupler is connected with the first end of the second pull-up resistor, the second end of the second optocoupler is connected with the detection device, the third end of the second optocoupler is connected with the second end of the second current-limiting resistor, and the fourth end of the second optocoupler is connected with the second end of the main contact of the second relay;
the second end of the second pull-up resistor is connected with the second direct current power supply;
the first end of the second current-limiting resistor is connected with the anode of the second detection power supply;
the first end of the second control relay is connected with the cathode of the second anti-reverse diode, and the second end of the second control relay is connected with the cathode of the second detection power supply;
and the anode of the second anti-reverse diode is connected with the first end of the main contact of the second relay.
7. A switch block, characterized in that it comprises an on-off control circuit according to any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120532819.8U CN215154052U (en) | 2021-03-15 | 2021-03-15 | On-off control loop and switch group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120532819.8U CN215154052U (en) | 2021-03-15 | 2021-03-15 | On-off control loop and switch group |
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| Publication Number | Publication Date |
|---|---|
| CN215154052U true CN215154052U (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120532819.8U Active CN215154052U (en) | 2021-03-15 | 2021-03-15 | On-off control loop and switch group |
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| Country | Link |
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| CN (1) | CN215154052U (en) |
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- 2021-03-15 CN CN202120532819.8U patent/CN215154052U/en active Active
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