CN219067864U - Power output control circuit - Google Patents
Power output control circuit Download PDFInfo
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- CN219067864U CN219067864U CN202223250046.8U CN202223250046U CN219067864U CN 219067864 U CN219067864 U CN 219067864U CN 202223250046 U CN202223250046 U CN 202223250046U CN 219067864 U CN219067864 U CN 219067864U
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Abstract
The utility model discloses a power supply output control circuit. When one of the auxiliary contact sets outputs a control signal, if any auxiliary contact set in the rest auxiliary contact sets connected in series with the auxiliary contact set outputs the control signal, the auxiliary contact set corresponding to the alternating current contactor connected with any auxiliary contact set is opened so as to inhibit one auxiliary contact set from outputting current. When one auxiliary contact set receives a high-level signal, if any auxiliary contact set in the rest auxiliary contact sets connected in series with the other auxiliary contact sets outputs a control signal, the alternating-current contactor connected with any auxiliary contact set is in a closed state, and the auxiliary contact set corresponding to the alternating-current contactor in the closed state needs to be controlled to be opened at the moment so as to inhibit other auxiliary contact sets of the opened auxiliary contact set from outputting the control signal, thereby leading to output current, and further controlling an output power supply through a hardware circuit to realize uniqueness of power supply output.
Description
Technical Field
The utility model relates to the technical field of power supply, in particular to a power output control circuit.
Background
At present, high-power industrial control products (such as a frequency converter and a servo driver) need different alternating current power supplies to supply power, such as three-phase alternating current 380V, three-phase alternating current 220V, single-phase alternating current 220V and three-phase alternating current 380V which are output to a rectifying unit and then converted into DC540V and the like. In the same test equipment, the above-mentioned different alternating current power supplies are required to be concentrated in one equipment, so that one equipment can meet different power supply requirements of products, and the traditional power-on mode is that which group of power supplies is required to control the group to power on, and other groups of power supplies cannot power on. The traditional control method is to conduct power-on control through software internal logic, so that potential safety hazards exist, the software cannot be guaranteed to run absolutely normally, the control unit is subjected to external electric interference, hardware control signals are abnormal, power-on is problematic, if equipment power supply output ports are also in multiple groups, the idle power supply output ports cannot be guaranteed to be in a power-free state, and safety is not very high. Therefore, how to control the output power supply through the hardware circuit to realize the uniqueness of power supply output becomes a technical problem to be solved urgently.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present utility model and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The utility model mainly aims to provide a power supply output control circuit, which aims to solve the technical problem of how to control an output power supply through a hardware circuit and realize uniqueness of power supply output.
In order to achieve the above object, the present utility model provides a power output control circuit including: the signal output module, a plurality of auxiliary contact groups with normally closed contacts and alternating current contactors corresponding to the auxiliary contact groups;
the output end of the signal output module is connected with the input ends of the auxiliary contact sets with the normally closed contacts, the output ends of the auxiliary contact sets with the normally closed contacts are connected with corresponding alternating current contactors, and the alternating current contactors are connected with a power supply;
the different auxiliary contact sets are divided into auxiliary contact sets of the same type and auxiliary contact sets of different types according to the type of a power supply corresponding to the connected alternating-current contactor, the auxiliary contact sets of the same type are connected in parallel, and the auxiliary contact sets of different types are connected in series;
when one of the auxiliary contact sets receives a high-level signal, if any auxiliary contact set in the rest auxiliary contact sets connected in series with the auxiliary contact set outputs a control signal, the auxiliary contact set corresponding to the alternating-current contactor connected with the any auxiliary contact set is opened so as to inhibit the auxiliary contact set from outputting current.
Optionally, the signal output module includes: a programmable logic controller;
the programmable logic controller is configured to output level signals to the plurality of auxiliary contact sets with normally closed contacts, where the level signals include: a high level signal and a plurality of low level signals.
Optionally, when any auxiliary contact set receives the high-level signal and the rest auxiliary contact sets receive the low-level signal, each auxiliary contact set maintains a default normally-closed state, and outputs a control signal through other contact sets connected in series with the any auxiliary contact set;
the alternating current contactor receiving the control signal enters a closed state to output current.
Optionally, after any ac contactor enters a closed state, an auxiliary contact group corresponding to the any ac contactor enters an open state, so that other auxiliary contact groups connected in series with the auxiliary contact group corresponding to the any ac contactor stop outputting control signals;
the ac contactor, which does not receive the control signal, enters an open state to prohibit the output current.
Optionally, the plurality of auxiliary contact sets with normally closed contacts include: first to third auxiliary contact groups;
the first input end of the first auxiliary contact group is connected with the first output end of the programmable logic controller, the first output end of the first auxiliary contact group is connected with the first input end of the second auxiliary contact group, and the first output end of the second auxiliary contact group is connected with a corresponding third alternating current contactor;
the second input end of the second auxiliary contact group is connected with the second output end of the programmable logic controller, the second output end of the second auxiliary contact group is connected with the first input end of the third auxiliary contact group, and the first output end of the third auxiliary contact group is connected with the corresponding first alternating current contactor;
the second input end of the third auxiliary contact group is connected with the third output end of the programmable logic controller, the second output end of the third auxiliary contact group is connected with the second input end of the first auxiliary contact group, and the second output end of the first auxiliary contact group is connected with a corresponding second alternating current contactor.
Optionally, when the first auxiliary contact set receives the high-level signal and the second auxiliary contact set and the third auxiliary contact set receive the low-level signal, the first auxiliary contact set, the second auxiliary contact set and the third auxiliary contact set all maintain a default normally closed state, and output a control signal through the second auxiliary contact set;
the third alternating current contactor which receives the control signal enters a closed state to output current.
Optionally, after the third ac contactor enters the closed state, the third auxiliary contact set enters the open state, and the second auxiliary contact set and the first auxiliary contact set stop outputting control signals;
the first ac contactor and the second ac contactor enter an open state to inhibit output current.
Optionally, the plurality of auxiliary contact sets with normally closed contacts include: fourth to seventh auxiliary contact groups;
the first input end of the fourth auxiliary contact group is connected with the first output end of the programmable logic controller, the first output end of the fourth auxiliary contact group is sequentially connected with the fifth auxiliary contact group and the sixth auxiliary contact group which are connected in series, and the output end of the sixth auxiliary contact group is connected with a corresponding seventh alternating current contactor;
the second input end of the fourth auxiliary contact group is connected with the second output end of the programmable logic controller, the second output end of the fourth auxiliary contact group is sequentially connected with the fifth auxiliary contact group and the seventh auxiliary contact group which are connected in series, and the first output end of the seventh auxiliary contact group is connected with a corresponding sixth alternating current contactor;
the input end of the sixth auxiliary contact group is connected with the third output end of the programmable logic controller, the output end of the sixth auxiliary contact group is sequentially connected with the fourth auxiliary contact group and the seventh auxiliary contact group which are connected in series, and the second output end of the seventh auxiliary contact group is connected with a corresponding fifth alternating current contactor;
the input end of the seventh auxiliary contact group is connected with the fourth output end of the programmable logic controller, the output end of the seventh auxiliary contact group is sequentially connected with the sixth auxiliary contact group and the fifth auxiliary contact group which are connected in series, and the output end of the fifth auxiliary contact group is connected with a corresponding fourth alternating current contactor.
Optionally, when the first input terminal of the fourth auxiliary contact group receives the high level signal and the fifth to seventh auxiliary contact groups receive the low level signal, the fourth to seventh auxiliary contact groups each maintain a default normally closed state, and a control signal is output through the sixth auxiliary contact group;
the seventh alternating current contactor receiving the control signal enters a closed state to output current.
Optionally, after the seventh ac contactor enters the closed state, the seventh auxiliary contact group enters the open state, and the first output end of the seventh auxiliary contact group, the second output end of the seventh auxiliary contact group, and the fifth auxiliary contact group stop outputting the control signal;
the fourth to sixth ac contactors are brought into an open state to prohibit an output current.
In the present utility model, a power supply output control circuit includes: the signal output module, a plurality of auxiliary contact groups with normally closed contacts and alternating current contactors corresponding to the auxiliary contact groups; the different auxiliary contact sets are divided into the same type auxiliary contact sets and different type auxiliary contact sets according to the type of a power supply corresponding to the connected alternating current contactor, the same type auxiliary contact sets are connected in parallel, and the different type auxiliary contact sets are connected in series; when one of the auxiliary contact sets receives a high-level signal, if any auxiliary contact set in the rest auxiliary contact sets connected in series with the auxiliary contact set outputs a control signal, the auxiliary contact set corresponding to the alternating current contactor connected with any auxiliary contact set is opened so as to inhibit one auxiliary contact set from outputting current. When one auxiliary contact group receives a high-level signal, if any auxiliary contact group in the rest auxiliary contact groups connected in series with the other auxiliary contact groups is output a control signal, the alternating-current contactor connected with the other auxiliary contact groups is in a closed state, and at the moment, the corresponding auxiliary contact group of the alternating-current contactor in the closed state needs to be controlled to be opened so as to inhibit other auxiliary contact groups of the opened auxiliary contact groups from outputting the control signal, and the output current is caused.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a functional block diagram of a first embodiment of a power output control circuit according to the present utility model;
FIG. 2 is a functional block diagram of a second embodiment of the power output control circuit of the present utility model;
FIG. 3 is a schematic circuit diagram of a second embodiment of the power output control circuit of the present utility model;
FIG. 4 is a schematic diagram of a circuit configuration of an auxiliary contact set and a programmable logic controller according to a second embodiment of the power output control circuit of the present utility model;
fig. 5 is a schematic circuit diagram of an ac contactor according to a second embodiment of the power output control circuit of the present utility model.
Reference numerals illustrate:
| 20 auxiliary contact group F1F7 first to seventh auxiliary contact groups |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
The utility model provides a switching power supply short-circuit protection circuit.
Referring to fig. 1, fig. 1 is a functional block diagram of a first embodiment of a short-circuit protection circuit for a switching power supply according to the present utility model.
In an embodiment of the present utility model, the switching power supply short-circuit protection circuit includes: the power output control circuit includes: a signal output module 10, a plurality of auxiliary contact groups 20 having normally closed contacts, and ac contactors 30 corresponding to the auxiliary contact groups 20;
it will be appreciated that the auxiliary contact set 20 in this embodiment has a normally closed contact, i.e. the default state of the auxiliary contact set 20 is the closed state.
It will be appreciated that each auxiliary contact set 20 corresponds to an ac contactor, and that the auxiliary contact sets may be snapped onto the ac contactor, with the corresponding auxiliary contact sets being opened when the ac contactor is in the closed state.
The output end of the signal output module 10 is connected with the input ends of the plurality of auxiliary contact sets 20 with normally closed contacts, the output ends of the plurality of auxiliary contact sets 20 with normally closed contacts are connected with corresponding alternating current contactors 30, and the alternating current contactors are connected with a power supply;
it will be appreciated that the signal output module 10 may output a high level or a low level to control whether the auxiliary contact set is in a default closed state, and that the auxiliary contact set is in the default closed state when the signal output module 10 outputs a high level.
The different auxiliary contact sets are divided into auxiliary contact sets of the same type and auxiliary contact sets of different types according to the type of a power supply corresponding to the connected alternating-current contactor, the auxiliary contact sets of the same type are connected in parallel, and the auxiliary contact sets of different types are connected in series;
it will be appreciated that one end of the ac contactor may be connected to a power supply and the other end connected to an external device, which may receive power through the closed ac contactor when the ac contactor is in the closed state.
In a specific implementation, the auxiliary contact set may include auxiliary contact sets of the same type and auxiliary contact sets of different types, and may be specifically distinguished according to the type of power supply corresponding to the connected ac contactor, for example: the power supply is three-phase alternating current 220V and single-phase alternating current 220V, and the corresponding auxiliary contact sets are auxiliary contact sets of different types. The auxiliary contact sets of the same type are connected in parallel, and the auxiliary contact sets of different types are connected in series.
When one of the auxiliary contact sets receives a high-level signal, if any auxiliary contact set in the rest auxiliary contact sets connected in series with the auxiliary contact set outputs a control signal, the auxiliary contact set corresponding to the alternating-current contactor connected with the any auxiliary contact set is opened so as to inhibit the auxiliary contact set from outputting current.
It can be understood that when one of the auxiliary contact sets receives a high-level signal, if any auxiliary contact set of the remaining auxiliary contact sets connected in series with the one auxiliary contact set outputs a control signal, the control signal can control the connected ac contactor to be closed, which indicates that the ac contactor connected with any auxiliary contact set is already in a closed state, at this time, the corresponding auxiliary contact set of the ac contactor in the closed state needs to be controlled to be opened, so that the other auxiliary contact sets of the opened auxiliary contact sets are prohibited from outputting the control signal, and thus, the current is output. The present embodiment can output a current to an external device, for example: frequency converters, servo drives, etc.
In a specific implementation, the ac contactor connected to the same auxiliary contact set and the ac contactor corresponding to the ac contactor may be different, the auxiliary contact set corresponding to the ac contactor refers to the auxiliary contact set clamped on the ac contactor, and the ac contactor connected to the auxiliary contact set refers to the ac contactor connected to the output end of the auxiliary contact.
In this embodiment, the power output control circuit includes: the signal output module, a plurality of auxiliary contact groups with normally closed contacts and alternating current contactors corresponding to the auxiliary contact groups; the different auxiliary contact sets are divided into the same type auxiliary contact sets and different type auxiliary contact sets according to the type of a power supply corresponding to the connected alternating current contactor, the same type auxiliary contact sets are connected in parallel, and the different type auxiliary contact sets are connected in series; when one of the auxiliary contact sets outputs a control signal, if any auxiliary contact set in the rest auxiliary contact sets connected in series with the auxiliary contact set outputs the control signal, the auxiliary contact set corresponding to the alternating current contactor connected with any auxiliary contact set is opened so as to inhibit one auxiliary contact set from outputting current. In this embodiment, different types of auxiliary contact sets are connected in series, when one of the auxiliary contact sets receives a high-level signal, if any auxiliary contact set of the remaining auxiliary contact sets connected in series with one of the auxiliary contact sets has output a control signal, it is indicated that the ac contactor connected to any auxiliary contact set is already in a closed state, at this time, the auxiliary contact set corresponding to the ac contactor in the closed state needs to be controlled to be opened, so that other auxiliary contact sets of the opened auxiliary contact set are prohibited from outputting the control signal, resulting in output current, thereby being capable of controlling the output power source through a hardware circuit, avoiding the situation that external equipment receives two different power sources at the same time, and realizing power supply output uniqueness.
Further, referring to fig. 2, fig. 2 is a functional block diagram of a second embodiment of the power output control circuit of the present utility model.
In this embodiment, the signal output module 10 includes: a programmable logic controller 101;
the programmable logic controller 101 is configured to output a level signal to the plurality of auxiliary contact sets 20 having normally closed contacts, where the level signal includes: a high level signal and a plurality of low level signals.
It should be noted that, the programmable logic controller (Programmable Logic Controller, PLC), a digital operation controller for automation control with a microprocessor, can load control instructions into the memory at any time for storage and execution. The present embodiment can output a high level signal and a plurality of low level signals to the plurality of auxiliary contact sets 20 having normally closed contacts, respectively, through the programmable logic controller 101.
Further, in this embodiment, when any one of the auxiliary contact sets receives the high-level signal and the remaining auxiliary contact sets receive the low-level signal, each auxiliary contact set maintains a default normally-closed state, and outputs a control signal through the other contact set connected in series with the any one auxiliary contact set; the alternating current contactor receiving the control signal enters a closed state to output current.
It can be understood that when any auxiliary contact set receives a high-level signal and the rest auxiliary contact sets receive a low-level signal, each auxiliary contact set maintains a default normally-closed state, and outputs a control signal through other contact sets connected in series with any auxiliary contact set, that is, outputs a control signal from the auxiliary contact set receiving the high-level signal after passing through the auxiliary contact set connected in series with the auxiliary contact set, and an ac contactor receiving the control signal can enter a closed state to output current.
Further, in this embodiment, after any ac contactor enters a closed state, an auxiliary contact group corresponding to the ac contactor enters an open state, so that other auxiliary contact groups connected in series with the auxiliary contact group corresponding to the ac contactor stop outputting control signals; the ac contactor, which does not receive the control signal, enters an open state to prohibit the output current.
It should be understood that when the ac contactor enters the closed state, the corresponding auxiliary contact set may be controlled to switch from the default normally closed state to the open state, so that no control signal is output as long as the auxiliary contact set in the open state is passed, and the ac controller that does not receive the control signal also enters the open state to prohibit the output of current.
Further, referring to fig. 3, fig. 3 is a schematic circuit diagram of a second embodiment of the power output control circuit of the present utility model.
As shown in fig. 3, the plurality of auxiliary contact sets having normally closed contacts includes: first F1 to third auxiliary contact group F3;
a first input end of the first auxiliary contact group F1 is connected with a first output end of the programmable logic controller 101, a first output end of the first auxiliary contact group F1 is connected with a first input end of the second auxiliary contact group F2, and a first output end of the second auxiliary contact group F2 is connected with a corresponding third ac contactor KM 3; a second input end of the second auxiliary contact group F2 is connected with a second output end of the programmable logic controller 101, a second output end of the second auxiliary contact group F2 is connected with a first input end of the third auxiliary contact group F3, and a first output end of the third auxiliary contact group F3 is connected with a corresponding first ac contactor KM 1; the second input end of the third auxiliary contact group F3 is connected to the third output end of the programmable logic controller 101, the second output end of the third auxiliary contact group F3 is connected to the second input end of the first auxiliary contact group F1, and the second output end of the first auxiliary contact group F1 is connected to the corresponding second ac contactor KM 2.
It is understood that the first auxiliary contact group F1 in fig. 3 corresponds to the first ac contactor KM1, the second auxiliary contact group F2 corresponds to the second ac contactor KM2, and the third auxiliary contact group F3 corresponds to the third ac contactor KM 3. The first auxiliary contact group F1 is connected with the second alternating-current contactor KM2, the second auxiliary contact group F2 is connected with the third alternating-current contactor KM3, and the third auxiliary contact group F3 is connected with the first alternating-current contactor KM 1.
It should be understood that fig. 3 is only a schematic circuit structure, and it may also be that the first input end of the first auxiliary contact group F1 is connected to the first output end of the programmable logic controller 101, the first output end of the first auxiliary contact group F1 is connected to the first input end of the third auxiliary contact group F3, and the first output end of the third auxiliary contact group F3 is connected to the corresponding second ac contactor KM 2; the first input end of the second auxiliary contact group F2 is connected with the second output end of the programmable logic controller 101, the first output end of the second auxiliary contact group F2 is connected with the second input end of the first auxiliary contact group F1, and the second output end of the first auxiliary contact group F1 is connected with a corresponding third alternating-current contactor KM 3; the second input end of the third auxiliary contact group F3 is connected to the third output end of the programmable logic controller 101, the second output end of the third auxiliary contact group F3 is connected to the second input end of the second auxiliary contact group F2, and the second output end of the second auxiliary contact group F2 is connected to the corresponding first ac contactor KM 1.
Further, in the present embodiment, when the first auxiliary contact group F1 receives the high level signal and the second auxiliary contact group F2 and the third auxiliary contact group F3 receive the low level signal, the first auxiliary contact group F1, the second auxiliary contact group F2 and the third auxiliary contact group F3 all maintain a default normally closed state and output a control signal through the second auxiliary contact group F2; the third ac contactor KM3 receiving the control signal enters a closed state, and outputs current through a corresponding power supply.
It is to be understood that this embodiment is described by taking the circuit configuration in fig. 3 as an example. In fig. 3, when the first auxiliary contact group F1 receives a high level signal and the second auxiliary contact group F2 and the third auxiliary contact group F3 receive a low level signal, the first auxiliary contact group F1, the second auxiliary contact group F2 and the third auxiliary contact group F3 all maintain a default normally closed state, at this time, the second auxiliary contact group F2 outputs a control signal, the third ac contactor KM3 enters a closed state, and current is output through a corresponding power supply.
In a specific implementation, when the second auxiliary contact group F2 receives a high-level signal and the first auxiliary contact group F1 and the third auxiliary contact group F3 receive a low-level signal, the first ac contactor KM1 enters a closed state; when the third auxiliary contact group F3 receives a high level signal and the first auxiliary contact group F1 and the second auxiliary contact group F2 receive a low level signal, the second ac contactor KM2 enters a closed state.
Further, in this embodiment, after the third ac contactor KM3 enters the closed state, the third auxiliary contact group F3 enters the open state, and the second auxiliary contact group F2 and the first auxiliary contact group F1 stop outputting the control signal; the first ac contactor KM1 and the second ac contactor KM2 enter an open state to prohibit the corresponding power supply from outputting current.
It should be understood that after the third ac contactor KM3 enters the closed state, the corresponding third auxiliary contact group F3 is switched from the default normally closed state to the open state, and if the second auxiliary contact group F2 or the third auxiliary contact group F3 receives the high level signal, the first ac contactor KM1 or the second ac contactor KM2 also does not receive the control signal, and enters the open state to prohibit the corresponding power supply from outputting the current.
In a specific implementation, after the first ac contactor KM1 or the second ac contactor KM2 enters the closed state, no other power supply output current will occur according to the above principle.
Further, referring to fig. 4, fig. 4 is a schematic circuit diagram of another auxiliary contact set and a programmable logic controller according to a second embodiment of the power output control circuit of the present utility model.
As shown in fig. 4, the plurality of auxiliary contact sets having normally closed contacts includes: fourth F4 to seventh auxiliary contact group F7;
the first input end of the fourth auxiliary contact group F4 is connected with the first output end of the programmable logic controller 101, the first output end of the fourth auxiliary contact group F4 is sequentially connected with the fifth auxiliary contact group F5 and the sixth auxiliary contact group F6 which are connected in series, and the output end of the sixth auxiliary contact group F6 is connected with a corresponding seventh alternating current contactor KM 7; a second input end of the fourth auxiliary contact group F4 is connected with a second output end of the programmable logic controller 101, the second output end of the fourth auxiliary contact group F4 is sequentially connected with the fifth auxiliary contact group F5 and the seventh auxiliary contact group F7 which are connected in series, and a first output end of the seventh auxiliary contact group F7 is connected with a corresponding sixth alternating current contactor KM 6; the input end of the sixth auxiliary contact group F6 is connected with the third output end of the programmable logic controller 101, the output end of the sixth auxiliary contact group F6 is sequentially connected with the fourth auxiliary contact group F4 and the seventh auxiliary contact group F7 which are connected in series, and the second output end of the seventh auxiliary contact group F7 is connected with a corresponding fifth alternating current contactor KM 5; the input end of the seventh auxiliary contact group F7 is connected with the fourth output end of the programmable logic controller 101, the output end of the seventh auxiliary contact group F7 is sequentially connected with the sixth auxiliary contact group F6 and the fifth auxiliary contact group F5 which are connected in series, and the output end of the fifth auxiliary contact group F5 is connected with the corresponding fourth ac contactor KM 4.
It can be understood that the signal received by the first input terminal of the fourth auxiliary contact group F4 in fig. 4 is KM1-1_51, the signal received by the second input terminal of the fourth auxiliary contact group F4 is KM1-1_71, the signal received by the fifth auxiliary contact group F5 is KM4_61, and the signal received by the sixth auxiliary contact group F6 is KM11_51. The control signal KM1-1_A2 output by the fifth auxiliary contact group F5 is connected with the fourth alternating current contactor KM4, the control signal KM11_A2 output by the sixth auxiliary contact group F6 is connected with the seventh alternating current contactor KM7, the control signal KM1-2_A2 output by the seventh auxiliary contact group F7 is connected with the fifth alternating current contactor KM5, and the control signal KM4_A2 output by the seventh auxiliary contact group F7 is connected with the sixth alternating current contactor KM 6. The port of the programmable logic controller 101 in fig. 4 outputting the level signal may be any one of Y0 to Y47, which is not particularly limited in this embodiment.
It should be understood that fig. 5 is a schematic circuit diagram of another ac contactor according to the second embodiment of the power output control circuit of the present utility model. As shown in fig. 5, the power supply corresponding to the fourth ac contactor KM4 is a three-phase ac 380V, the power supply corresponding to the fifth ac contactor KM5 is a single-phase ac 220V, the power supply corresponding to the sixth ac contactor KM6 is a three-phase ac 220V, and the power supply corresponding to the seventh ac contactor KM7 is a rectified DC540V. Fig. 5 may output current to an external device, which supplies power to the console CON 2-product via ac and the console CON 3-product via dc. RST represents three-phase power, N represents zero line, and Lamp1 represents signal Lamp.
In a specific implementation, the connection manner of the fourth to seventh auxiliary contact sets F4 to F7 may be other manners, the series auxiliary contact sets need to include three auxiliary contact sets, and the ac contactor corresponding to the remaining one auxiliary contact set is an ac contactor that needs to receive a control signal, which is not repeated in this embodiment for the specific connection manner.
Further, in the present embodiment, when the first input terminal of the fourth auxiliary contact group F4 receives the high level signal and the fifth to seventh auxiliary contact groups F5 to F7 receive the low level signal, the fourth to seventh auxiliary contact groups F4 to F7 each maintain a default normally closed state and output a control signal through the sixth auxiliary contact group F6; the seventh ac contactor KM7, which receives the control signal, enters a closed state to output a current.
It is to be understood that this embodiment is described by taking the circuit configuration in fig. 4 as an example. In fig. 4, when the first input end of the fourth auxiliary contact group F4 receives a high level signal and the fifth F5 to seventh auxiliary contact groups F7 receive a low level signal, the fourth F4 to seventh auxiliary contact groups F7 all maintain a default normally closed state, at this time, the sixth auxiliary contact group F6 outputs a control signal, the seventh ac contactor KM7 enters a closed state, and current is output through a corresponding power supply.
In a specific implementation, when the second auxiliary contact group F2 receives a high-level signal and the first auxiliary contact group F1 and the third auxiliary contact group F3 receive a low-level signal, the first ac contactor KM1 enters a closed state; when the third auxiliary contact group F3 receives a high level signal and the first auxiliary contact group F1 and the second auxiliary contact group F2 receive a low level signal, the second ac contactor KM2 enters a closed state.
Further, in this embodiment, after the seventh ac contactor KM7 enters the closed state, the seventh auxiliary contact group F7 enters the open state, and the first output end of the seventh auxiliary contact group F7, the second output end of the seventh auxiliary contact group F7, and the fifth auxiliary contact group F5 stop outputting the control signal; the fourth F4 to sixth ac contactor F6 are brought into an open state to prohibit the output current.
It should be understood that, after the seventh ac contactor KM7 enters the closed state, the corresponding seventh auxiliary contact group F7 is switched from the default normally closed state to the open state, and if the fourth auxiliary contact group F4 or the fifth auxiliary contact group F5 or the sixth auxiliary contact group F6 receives the high level signal, the fourth ac contactor KM4 or the fifth ac contactor KM5 or the sixth ac contactor KM6 also does not receive the control signal, and enters the open state to prohibit the corresponding power supply from outputting the current.
It will be appreciated that, after the fourth ac contactor KM4 or the fifth ac contactor KM5 or the sixth ac contactor is brought into the closed state, no other power supply source will supply power to the external device according to the above principle.
In a specific implementation, referring to table 1, table 1 is a power supply input condition through the circuit structure diagrams of fig. 4 and 5 in the present embodiment.
Table 1:
in this embodiment, the signal output module includes: the programmable logic controller, the embodiment outputs level signals to a plurality of auxiliary contact groups with normally closed contacts through the programmable logic controller, wherein the level signals comprise: a high level signal and a plurality of low level signals. According to the embodiment, the default normally-closed state of the auxiliary contact sets can be controlled according to the high-level signal, when one auxiliary contact set receives the high-level signal, if any auxiliary contact set in the rest auxiliary contact sets connected in series with one auxiliary contact set outputs a control signal, the AC contactor connected with any auxiliary contact set is indicated to be in the closed state, at the moment, the auxiliary contact set corresponding to the AC contactor in the closed state needs to be controlled to be opened, so that other auxiliary contact sets passing through the opened auxiliary contact set are forbidden to output the control signal, and the output current is caused, so that the condition that external equipment receives two power supplies simultaneously is avoided, and the uniqueness of power supply output is realized.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (10)
1. A power output control circuit, the power output control circuit comprising: the signal output module, a plurality of auxiliary contact groups with normally closed contacts and alternating current contactors corresponding to the auxiliary contact groups;
the output end of the signal output module is connected with the input ends of the auxiliary contact sets with the normally closed contacts, the output ends of the auxiliary contact sets with the normally closed contacts are connected with corresponding alternating current contactors, and the alternating current contactors are connected with a power supply;
the different auxiliary contact sets are divided into auxiliary contact sets of the same type and auxiliary contact sets of different types according to the type of a power supply corresponding to the connected alternating-current contactor, the auxiliary contact sets of the same type are connected in parallel, and the auxiliary contact sets of different types are connected in series;
when one of the auxiliary contact sets receives a high-level signal, if any auxiliary contact set in the rest auxiliary contact sets connected in series with the auxiliary contact set outputs a control signal, the auxiliary contact set corresponding to the alternating-current contactor connected with the any auxiliary contact set is opened so as to inhibit the auxiliary contact set from outputting current.
2. The power output control circuit of claim 1, wherein the signal output module comprises: a programmable logic controller;
the programmable logic controller is configured to output level signals to the plurality of auxiliary contact sets with normally closed contacts, where the level signals include: a high level signal and a plurality of low level signals.
3. The power output control circuit as claimed in claim 2, wherein when any one of the auxiliary contact sets receives the high level signal and the remaining auxiliary contact sets receive the low level signal, each auxiliary contact set maintains a default normally closed state and outputs a control signal through the other contact set connected in series with the any one of the auxiliary contact sets;
the alternating current contactor receiving the control signal enters a closed state to output current.
4. The power output control circuit as claimed in claim 3, wherein after any one of the ac contactors enters a closed state, the auxiliary contact group corresponding to the any one of the ac contactors enters an open state, so that the other auxiliary contact groups connected in series with the auxiliary contact group corresponding to the any one of the ac contactors stop outputting the control signal;
the ac contactor, which does not receive the control signal, enters an open state to prohibit the output current.
5. The power output control circuit of claim 2, wherein the plurality of auxiliary contact sets having normally closed contacts comprises: first to third auxiliary contact groups;
the first input end of the first auxiliary contact group is connected with the first output end of the programmable logic controller, the first output end of the first auxiliary contact group is connected with the first input end of the second auxiliary contact group, and the first output end of the second auxiliary contact group is connected with a corresponding third alternating current contactor;
the second input end of the second auxiliary contact group is connected with the second output end of the programmable logic controller, the second output end of the second auxiliary contact group is connected with the first input end of the third auxiliary contact group, and the second output end of the second auxiliary contact group is connected with the corresponding first alternating current contactor;
the second input end of the third auxiliary contact group is connected with the third output end of the programmable logic controller, the second output end of the third auxiliary contact group is connected with the second input end of the first auxiliary contact group, and the second output end of the first auxiliary contact group is connected with a corresponding second alternating current contactor.
6. The power output control circuit of claim 5 wherein when the first auxiliary contact set receives the high level signal and the second auxiliary contact set and the third auxiliary contact set receive the low level signal, the first auxiliary contact set, the second auxiliary contact set, and the third auxiliary contact set each remain in a default normally closed state and output a control signal through the second auxiliary contact set;
the third alternating current contactor which receives the control signal enters a closed state to output current.
7. The power output control circuit of claim 6 wherein the third auxiliary contact set is in an open state after the third ac contactor is in a closed state, the second auxiliary contact set and the first auxiliary contact set ceasing to output control signals;
the first ac contactor and the second ac contactor enter an open state to inhibit output current.
8. The power output control circuit of claim 2, wherein the plurality of auxiliary contact sets having normally closed contacts comprises: fourth to seventh auxiliary contact groups;
the first input end of the fourth auxiliary contact group is connected with the first output end of the programmable logic controller, the first output end of the fourth auxiliary contact group is sequentially connected with the fifth auxiliary contact group and the sixth auxiliary contact group which are connected in series, and the output end of the sixth auxiliary contact group is connected with a corresponding seventh alternating current contactor;
the second input end of the fourth auxiliary contact group is connected with the second output end of the programmable logic controller, the second output end of the fourth auxiliary contact group is sequentially connected with the fifth auxiliary contact group and the seventh auxiliary contact group which are connected in series, and the first output end of the seventh auxiliary contact group is connected with a corresponding sixth alternating current contactor;
the input end of the sixth auxiliary contact group is connected with the third output end of the programmable logic controller, the output end of the sixth auxiliary contact group is sequentially connected with the fourth auxiliary contact group and the seventh auxiliary contact group which are connected in series, and the second output end of the seventh auxiliary contact group is connected with a corresponding fifth alternating current contactor;
the input end of the seventh auxiliary contact group is connected with the fourth output end of the programmable logic controller, the output end of the seventh auxiliary contact group is sequentially connected with the sixth auxiliary contact group and the fifth auxiliary contact group which are connected in series, and the output end of the fifth auxiliary contact group is connected with a corresponding fourth alternating current contactor.
9. The power output control circuit of claim 8, wherein when the first input of the fourth set of auxiliary contacts receives the high level signal and the fifth through seventh sets of auxiliary contacts receive the low level signal, the fourth through seventh sets of auxiliary contacts each remain in a default normally closed state and output a control signal through the sixth set of auxiliary contacts;
the seventh alternating current contactor receiving the control signal enters a closed state to output current.
10. The power output control circuit of claim 9, wherein the seventh auxiliary contact set is in an open state after the seventh ac contactor is in a closed state, the first output of the seventh auxiliary contact set, the second output of the seventh auxiliary contact set, and the fifth auxiliary contact set cease outputting control signals;
the fourth to sixth ac contactors are brought into an open state to prohibit an output current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223250046.8U CN219067864U (en) | 2022-12-02 | 2022-12-02 | Power output control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223250046.8U CN219067864U (en) | 2022-12-02 | 2022-12-02 | Power output control circuit |
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| Publication Number | Publication Date |
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| CN219067864U true CN219067864U (en) | 2023-05-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223250046.8U Active CN219067864U (en) | 2022-12-02 | 2022-12-02 | Power output control circuit |
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| CN (1) | CN219067864U (en) |
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