CN213243513U - Circuit system - Google Patents
Circuit system Download PDFInfo
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- CN213243513U CN213243513U CN202022318164.2U CN202022318164U CN213243513U CN 213243513 U CN213243513 U CN 213243513U CN 202022318164 U CN202022318164 U CN 202022318164U CN 213243513 U CN213243513 U CN 213243513U
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- magnetic latching
- electrically connected
- power supply
- latching relay
- direct current
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Abstract
The present disclosure provides a circuit system, and relates to the technical field of electronic circuits. The circuit system includes: a system power supply; a magnetic latching relay electrically connected to the system power supply; a DC bus electrically connected to the magnetic latching relay; the direct current bus capacitor is arranged between the direct current buses; the controller is electrically connected with the direct current bus capacitor; when the system power supply stops supplying power, the controller sends a disconnection control pulse to the magnetic latching relay by using the electric energy stored in the direct current bus capacitor. According to the method, under the condition that the system power supply stops supplying power, the residual electricity stored in the direct current bus capacitor is used for driving the magnetic latching relay to be switched off, so that the voltage on the direct current bus capacitor is rapidly discharged, and the safety of a circuit system is improved.
Description
Technical Field
The present disclosure relates to electronic circuit technologies, and in particular, to a circuit system.
Background
In the circuit system, a dc contactor or a relay is generally used to control connection and disconnection between the electric device and the power source.
Taking a photovoltaic system as an example, the voltage on the photovoltaic cell panel is connected to the high-voltage direct current bus through the direct current-direct current DC/DC converter and then connected to the power grid through the direct current-alternating current DC/AC converter. The direct current contactor is arranged between the photovoltaic cell panel and the DC/DC converter, so that the connection and disconnection of the photovoltaic cell panel can be realized reliably and controllably; a relay is arranged between the DC/AC converter and the power grid, so that the connection and the disconnection of the power grid can be realized reliably and controllably.
SUMMERY OF THE UTILITY MODEL
The technical problem solved by the present disclosure is how to improve the safety of the circuit system.
The present disclosure provides a circuit system comprising: a system power supply; a magnetic latching relay electrically connected to the system power supply; a DC bus electrically connected to the magnetic latching relay; the direct current bus capacitor is arranged between the direct current buses; the controller is electrically connected with the direct current bus capacitor; when the system power supply stops supplying power, the controller sends a disconnection control pulse to the magnetic latching relay by using the electric energy stored in the direct current bus capacitor.
In some embodiments, the controller is electrically connected to a system power supply; under the condition of power supply of a system power supply, the controller sends closing control pulses to the magnetic latching relay by using the electric energy provided by the system power supply.
In some embodiments, the turn-off control pulse is a first pulse signal; the magnetic latching relay includes: a first photo coupler electrically connected to a ground terminal of the magnetic latching relay; the coil is respectively electrically connected with power ends of the first optical coupler and the magnetic latching relay; a permanent magnet coupled to the coil; and the first optocoupler is switched on under the condition of receiving the first pulse signal, and the permanent magnet is driven by the current in the first direction in the coil to move so as to switch off the magnetic latching relay.
In some embodiments, the opening control pulse is a first pulse signal, and the closing control pulse includes a second pulse signal and a third pulse signal; the magnetic latching relay includes: a first optical coupler and a second optical coupler electrically connected to a ground terminal of the magnetic latching relay; the electromagnetic relay is electrically connected with a power supply end of the magnetic latching relay and comprises a first contact and a second contact; a coil electrically connected to the first optical coupler, the second optical coupler, and the electromagnetic relay, respectively; a permanent magnet coupled to the coil; the first optical coupler is conducted under the condition of receiving a first pulse signal, the electromagnetic relay is connected with the first contact, and the current in the coil in the first direction drives the permanent magnet to move so as to disconnect the magnetic latching relay; the second optical coupler is conducted under the condition of receiving the second pulse signal, the electromagnetic relay is conducted on the second contact under the condition of receiving the third pulse signal, the permanent magnet is driven to move by the current in the coil in the second direction, and the magnetic latching relay is closed, wherein the second direction is opposite to the first direction.
In some embodiments, the controller comprises: the power panel is electrically connected with the direct current bus; the control board is electrically connected with the power supply board; and under the condition that the system power supply stops supplying power, the control panel acquires the electric energy stored by the direct current bus capacitor through the power panel and sends a disconnection control pulse to the magnetic latching relay.
In some embodiments, the power panel is electrically connected with the system power supply, and in the case of power supply of the system power supply, the control panel acquires electric energy provided by the system power supply through the power panel and sends a closing control pulse to the magnetic latching relay.
In some embodiments, the system power supply comprises: a power grid power supply and a photovoltaic power generation power supply; the magnetic latching relay includes: the device comprises a first magnetic latching relay electrically connected with a power grid power supply and a second magnetic latching relay electrically connected with a photovoltaic power generation power supply.
In some embodiments, the number of the first magnetic latching relays and the number of the second magnetic latching relays are respectively multiple.
In some embodiments, the circuitry further comprises: the direct current-alternating current converter is electrically connected with the direct current bus and the first magnetic latching relay respectively; a compressor drive circuit electrically connected to the DC-AC converter and the DC-AC converter, respectively; a motor electrically connected to the compressor drive circuit; a DC-DC converter electrically connected to the second magnetic latching relay and the DC bus, respectively; and the energy storage circuit is electrically connected with the direct current-direct current converter and the direct current bus respectively.
In some embodiments, the compressor drive circuit is a compressor drive circuit of an air conditioner and the motor is a motor of the air conditioner.
According to the method, under the condition that the system power supply stops supplying power, the residual electricity stored in the direct current bus capacitor is used for driving the magnetic latching relay to be switched off, so that the voltage on the direct current bus capacitor is rapidly discharged, and the safety of a circuit system is improved.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure or technical solutions in the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and for those skilled in the art, other drawings may be obtained according to the drawings without inventive exercise.
Fig. 1 illustrates a schematic structural diagram of circuitry of some embodiments of the present disclosure.
Fig. 2 shows a schematic structural diagram of a magnetic latching relay according to some embodiments of the present disclosure.
Fig. 3 shows a case where the magnetic latching relay needs to be opened.
Fig. 4 shows a case where the magnetic latching relay needs to be closed.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The inventors have found that a dc bus capacitor is usually provided between the dc buses of the circuit system. Under the condition that a system power supply stops supplying power, the voltage on the direct current bus capacitor discharges slowly, so that potential safety hazards exist in a circuit system. Meanwhile, when the circuit system runs under the condition of power supply of a system power supply, the direct current contactor and the relay consume high electric energy, the heating is serious, the running efficiency of the circuit system is reduced, the heat dissipation problem of the circuit system is caused, and therefore the safety of the circuit system is also reduced.
To improve the safety of the circuit system, the inventor provides a circuit system, which is described in detail below.
Some embodiments of the disclosed circuitry are first described in conjunction with fig. 1.
Fig. 1 illustrates a schematic structural diagram of circuitry of some embodiments of the present disclosure. The circuitry 10 in fig. 1 includes: a system power supply 101; a magnetic latching relay 102 electrically connected to the system power supply 101; a dc bus 103 electrically connected to the magnetic latching relay 102; a dc bus capacitor 104 disposed between the dc buses 103; and a controller 105 electrically connected to the dc bus capacitor 104. When the system power supply 101 stops supplying power, the controller 105 transmits an off control pulse to the magnetic latching relay 102 by using the electric energy stored in the dc bus capacitor 104.
As can be understood by those skilled in the art, in the case of a system power supply failure, the residual electricity stored in the DC bus capacitor cannot provide power for a long time, but can provide power for a period of time. The power of the time period supplies power to the controller, and the controller can send an off control pulse signal. The magnetic latching relay is switched off under the action of the switching-off control pulse signal and keeps the switching-off state continuously. Residual electricity stored by the direct current bus capacitor is used for driving the magnetic latching relay to be switched off, so that the voltage on the direct current bus capacitor can be rapidly discharged, and the safety of a circuit system is improved.
In some embodiments, the controller 105 is electrically connected to the system power supply 101. In the case where the system power source 101 supplies power, the controller 105 sends a closing control pulse to the magnetic latching relay 102 using the power supplied from the system power source 101.
In the operation process of a circuit system, the magnetic latching relay is closed under the action of the closing control pulse and continuously keeps a closed state under the condition of not needing continuous power supply, so that the phenomenon that a direct current contactor and the relay generate heat seriously can be avoided. Therefore, the power loss of the circuit system is reduced, the heat dissipation problem during the operation of the circuit system can be relieved, and the safety of the circuit system is further improved.
In some embodiments, the controller 105 includes: a power supply board 1051 electrically connected to the dc bus 103; and a control board 1052 electrically connected to the power supply board 1051.
In the case where the system power supply 101 stops supplying power, the control board 1052 acquires the electric power stored in the dc bus capacitor 104 through the power supply board 1051, and sends an off control pulse to the magnetic latching relay 102.
In some embodiments, power strip 1051 is electrically connected to system power supply 101.
In the case of supplying power to the system power supply 101, the control board 1052 obtains power supplied from the system power supply 101 through the power supply board 1051 and sends a closing control pulse to the magnetic latching relay 102.
In some embodiments, the system power supply 101 includes: a grid power source 1012 and a photovoltaic power source 1012, which may be, for example, a photovoltaic panel. The magnetic latching relay 102 includes: a first magnetic latching relay 1021 electrically connected to the grid power source 1012 and a second magnetic latching relay 1022 electrically connected to the photovoltaic power generation power source 1012.
In some embodiments, the number of the first magnetic latching relays 1021 and the second magnetic latching relays 1022 may be one or more. For example, the first magnetic latching relay 1021 includes K1, K2, K3, K4, and the second magnetic latching relay 1022 includes K5, K6.
In some embodiments, the circuitry 10 further comprises: a dc-ac converter 105 electrically connected to the dc bus 103 and the first magnetic latching relay 1021, respectively; a compressor drive circuit 106 electrically connected to the dc-ac converter 105 and the dc-ac converter 105, respectively; a motor 107 electrically connected to the compressor drive circuit 106; a dc-dc converter 108 electrically connected to the second magnetic latching relay 1022 and the dc bus 103, respectively; and the energy storage circuit 109 is electrically connected with the direct current-direct current converter 108 and the direct current bus 103 respectively.
In some embodiments, the compressor drive circuit 106 is a compressor drive circuit 106 of an air conditioner and the motor 107 is a motor 107 of the air conditioner. In this case, the circuit system is an air conditioning system capable of reducing power consumption.
The operation of the circuit system is specifically exemplified as follows.
(1) Power supply condition of system power supply
The control board sends out control pulses to electrify the coils of K1, K2, K3 and K4, and K1, K2, K3 and K4 are closed. Then, the control board closes the control pulse again to maintain the closed state of K1, K2, K3 and K4, and the circuit system operates normally. When the photovoltaic power generation power access system is needed, the K5 and the K6 are closed in a similar control mode.
(2) Situation of system power supply stop
Because the voltage on the direct current bus capacitor needs the process of bleeding off, the power panel can maintain a period of time power supply, and based on this control panel output control pulse, make the coil of K1, K2, K3, K4, K5, K6 reverse to get electric. K1, K2, K3, K4, K5 and K6 are reset and disconnected to prepare for the next starting operation.
Some embodiments of the magnetic latching relay of the present disclosure are described below in conjunction with fig. 2.
Fig. 2 shows a schematic structural diagram of a magnetic latching relay according to some embodiments of the present disclosure.
In some embodiments, the open control pulse is a first pulse signal. The magnetic latching relay 102 includes: a first photocoupler 2021 electrically connected to the ground terminal of the magnetic latching relay; a coil 2022 electrically connected to the first photocoupler 2021 and a power supply terminal VCC of the magnetic latching relay 102, respectively; a permanent magnet 2023 coupled to a coil 2022.
The first photocoupler 2021 is turned on when receiving the first pulse signal, and the permanent magnet 2023 is moved by the current in the first direction in the coil 2022 to turn off the magnetic latching relay 102.
In some embodiments, the opening control pulse is a first pulse signal, and the closing control pulse includes a second pulse signal and a third pulse signal. The magnetic latching relay 102 includes: a first photocoupler 2021 and a second photocoupler 2024 electrically connected to the ground of the magnetic latching relay; an electromagnetic relay 2025 electrically connected to a power supply terminal VCC of the magnetic latching relay 102, the electromagnetic relay 2025 including a first contact 20251 and a second contact 20252; a coil 2022 electrically connected to the first photocoupler 2021, the second photocoupler 2024, and the electromagnetic relay 2025, respectively; a permanent magnet 2023 coupled to a coil 2022.
When the first photocoupler 2021 is turned on by receiving the first pulse signal, the electromagnetic relay turns on the first contact 20251, and the permanent magnet 2023 is moved by the current in the coil 2022 in the first direction to turn off the magnetic latching relay 102.
The second photocoupler 2024 is turned on when receiving the second pulse signal, the electromagnetic relay 2025 turns on the second contact 20252 when receiving the third pulse signal, and the permanent magnet 2023 is moved by the current in the coil 2022 in the second direction opposite to the first direction to close the magnetic latching relay 102.
The operation of the magnetic latching relay is specifically exemplified as follows.
(1) Fig. 3 shows a case where the magnetic latching relay needs to be opened.
The control board outputs a first pulse signal S21, the electromagnetic relay is switched on the contact 1, the first optical coupler starts to work, the coil of the magnetic latching relay is electrified, and the magnetic latching relay is switched off. Then, the control board outputs the first pulse signal S21 to be turned off again. The duration of the pulse signal S21 can be adjusted according to the actual component selection, and can be set to 200 milliseconds, for example.
(2) Fig. 4 shows a case where the magnetic latching relay needs to be closed.
The control board outputs a second pulse signal S22 and a third pulse signal S23, S22 to enable the second optical coupler to start working, S23 enables the electromagnetic relay to be switched to the contact 2, the coil of the magnetic latching relay is electrified in the reverse direction, and the magnetic latching relay is closed. Then, the control board outputs a second pulse signal S22 and a third pulse signal S23. The duration of the pulse signals S22, S23 may be adjusted according to the actual component selection, and may be set to 200 milliseconds, for example.
The above description is only exemplary of the present disclosure and is not intended to limit the present disclosure, so that any modification, equivalent replacement, or improvement made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (10)
1. A circuit system, comprising:
a system power supply;
a magnetic latching relay electrically connected to the system power supply;
a DC bus electrically connected to the magnetic latching relay;
the direct current bus capacitor is arranged between the direct current buses; and
the controller is electrically connected with the direct current bus capacitor;
when the system power supply stops supplying power, the controller sends a disconnection control pulse to the magnetic latching relay by using the electric energy stored in the direct current bus capacitor.
2. The circuitry of claim 1, wherein the controller is electrically connected to a system power supply; under the condition of power supply of a system power supply, the controller sends closing control pulses to the magnetic latching relay by using the electric energy provided by the system power supply.
3. The circuitry of claim 1, wherein the turn-off control pulse is a first pulse signal;
the magnetic latching relay includes:
a first photo coupler electrically connected to a ground terminal of the magnetic latching relay;
the coil is respectively electrically connected with power ends of the first optical coupler and the magnetic latching relay;
a permanent magnet coupled to the coil;
and the first optocoupler is switched on under the condition of receiving the first pulse signal, and the permanent magnet is driven by the current in the first direction in the coil to move so as to switch off the magnetic latching relay.
4. The circuitry of claim 2, wherein the open control pulse is a first pulse signal and the close control pulse comprises a second pulse signal and a third pulse signal;
the magnetic latching relay includes:
a first optical coupler and a second optical coupler electrically connected to a ground terminal of the magnetic latching relay;
the electromagnetic relay is electrically connected with a power supply end of the magnetic latching relay and comprises a first contact and a second contact;
a coil electrically connected to the first optical coupler, the second optical coupler, and the electromagnetic relay, respectively;
a permanent magnet coupled to the coil;
the first optical coupler is conducted under the condition of receiving a first pulse signal, the electromagnetic relay is connected with the first contact, and the current in the coil in the first direction drives the permanent magnet to move so as to disconnect the magnetic latching relay;
the second optical coupler is conducted under the condition of receiving the second pulse signal, the electromagnetic relay is conducted on the second contact under the condition of receiving the third pulse signal, the permanent magnet is driven to move by the current in the coil in the second direction, and the magnetic latching relay is closed, wherein the second direction is opposite to the first direction.
5. The circuitry of claim 1, wherein the controller comprises:
the power panel is electrically connected with the direct current bus;
the control board is electrically connected with the power supply board;
and under the condition that the system power supply stops supplying power, the control panel acquires the electric energy stored by the direct current bus capacitor through the power panel and sends a disconnection control pulse to the magnetic latching relay.
6. The circuitry of claim 5,
the power panel is electrically connected with the system power supply, and under the condition that the system power supply supplies power, the control panel acquires electric energy provided by the system power supply through the power panel and sends closing control pulses to the magnetic latching relay.
7. The circuitry of claim 1,
the system power supply includes: a power grid power supply and a photovoltaic power generation power supply;
the magnetic latching relay includes: the device comprises a first magnetic latching relay electrically connected with a power grid power supply and a second magnetic latching relay electrically connected with a photovoltaic power generation power supply.
8. The circuit system according to claim 7, wherein the number of the first magnetic latching relays and the number of the second magnetic latching relays are plural.
9. The circuitry defined in claim 7 further comprising:
the direct current-alternating current converter is electrically connected with the direct current bus and the first magnetic latching relay respectively;
a compressor drive circuit electrically connected to the DC-AC converter and the DC-AC converter, respectively;
a motor electrically connected to the compressor drive circuit;
a DC-DC converter electrically connected to the second magnetic latching relay and the DC bus, respectively;
and the energy storage circuit is electrically connected with the direct current-direct current converter and the direct current bus respectively.
10. The circuit system of claim 9, wherein the compressor drive circuit is a compressor drive circuit of an air conditioner and the motor is a motor of the air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022318164.2U CN213243513U (en) | 2020-10-16 | 2020-10-16 | Circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022318164.2U CN213243513U (en) | 2020-10-16 | 2020-10-16 | Circuit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213243513U true CN213243513U (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022318164.2U Active CN213243513U (en) | 2020-10-16 | 2020-10-16 | Circuit system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213243513U (en) |
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2020
- 2020-10-16 CN CN202022318164.2U patent/CN213243513U/en active Active
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