CN205304385U - A switching circuit - Google Patents
A switching circuit Download PDFInfo
- Publication number
- CN205304385U CN205304385U CN201521098749.0U CN201521098749U CN205304385U CN 205304385 U CN205304385 U CN 205304385U CN 201521098749 U CN201521098749 U CN 201521098749U CN 205304385 U CN205304385 U CN 205304385U
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- Prior art keywords
- photoelectrical coupler
- relay
- contact
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- foot
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Abstract
The utility model relates to a switching circuit, an optoelectronic coupler U1 and the 2nd optoelectronic coupler U2 including parallelly connected still include first relay K1, second relay K2 and two voltage comparater integrated circuit U3. The utility model discloses a switching circuit is through detecting the commercial power state to the switching of load power supply be can carry out according to the testing result, dependable performance and simple structure, with low costs are makeed.
Description
Technical field
This utility model relates to civil power inversion handoff technique, particularly relates to the one switching circuit in civil power inversion switching.
Background technology
Uninterrupted power source (UninterruptiblePowerSystem/UninterruptiblePowerSupply, it is called for short UPS) it is that accumulator is connected with main frame, by modular circuits such as main frame inverters by the system equipment of converting direct-current power into alternating-current power. It is mainly used in providing stable, continual supply of electric power to single computer, computer network system or other power electronic equipment such as electromagnetic valve, pressure transmitter etc.
UPS generally includes accumulator, storage battery charge controller, inverter, civil power inversion switch controller, when, after civil power power-off, by civil power inversion switch controller, inverter being outputted to load supplying end, for load supplying. Civil power inversion switch controller structure complexity on the market, relatively costly at present, and reliability is low.
Utility model content
The purpose of this utility model is in that to provide a kind of switching circuit, switches for civil power inversion, to solve the problem of civil power inversion switching poor reliability in prior art.
This utility model provides a kind of switching circuit, including the first photoelectrical coupler U1 in parallel and the second photoelectrical coupler U2, also include first relay K the 1, second relay K 2 and twin voltage comparator integrated circuit U3,1 foot of the first photoelectrical coupler U1 is connected to the first electric capacity C1,2 feet are connected to the first resistance R1,1 foot of the second photoelectrical coupler U2 is connected to the second electric capacity C2,2 feet are connected to the second resistance R2, and 4 feet of the first photoelectrical coupler U1 and the second photoelectrical coupler U2 pass through the 3rd electric capacity C3 ground connection; One input of 3 feet of the first photoelectrical coupler U1 and the second photoelectrical coupler U2 and twin voltage comparator integrated circuit U3 is by a RC parallel circuit ground connection; First relay K 1 and the second relay K 2 are connected in parallel respectively through contact 4 and contact 5, are connected mains electricity input end by contact 2, connected inverter output end by contact 3 and connect loading interfaces by contact 1, and the first relay K 1 and the second relay K 2 electrically connect with the first photoelectrical coupler U1 and the second photoelectrical coupler U2 respectively through contact 2.
Further, the first relay K 1 is electrically connected with 2 feet of the first photoelectrical coupler U1 and 1 foot of the second photoelectrical coupler U2 by contact 2; Second relay K 2 is electrically connected with 1 foot of the first photoelectrical coupler U1 and 2 feet of the second photoelectrical coupler U2 by contact 2.
Further, another input of twin voltage comparator integrated circuit U3 passes through the 2nd RC parallel circuit ground connection, and is connected by the 3rd resistance R3 and 5V voltage; The outfan of twin voltage comparator integrated circuit U3 is connected by the 4th resistance R4 and 5V voltage, and by the 5th resistance R5 and external connection.
Adopting above-mentioned technical solutions of the utility model to provide the benefit that: by city's electricity condition is detected, such that it is able to carry out the switching of load supplying according to testing result so that dependable performance, and simple in construction, cost are low.
Accompanying drawing explanation
Fig. 1 is a kind of electrical block diagram switching circuit of the present utility model;
Fig. 2 is a kind of application schematic diagram switching circuit of the present utility model.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in this utility model embodiment, technical scheme in this utility model embodiment is clearly and completely described, obviously, described embodiment is a part of embodiment of this utility model, rather than whole embodiments.
The utility model discloses a kind of switching circuit, this switching circuit is for civil power inversion switching, as shown in Figure 1, this switching circuit includes the first photoelectrical coupler U1 and the second photoelectrical coupler U2 of parallel connection, also include the first relay K 1, second relay K 2 and twin voltage comparator integrated circuit U3, 1 foot of the first photoelectrical coupler U1 is connected to the first electric capacity C1, 2 feet are connected to the first resistance R1, 1 foot of the second photoelectrical coupler U2 is connected to the second electric capacity C2, 2 feet are connected to the second resistance R2, 4 feet of the first photoelectrical coupler U1 and the second photoelectrical coupler U2 pass through the 3rd electric capacity C3 ground connection, one input of 3 feet of the first photoelectrical coupler U1 and the second photoelectrical coupler U2 and twin voltage comparator integrated circuit U3 is by a RC parallel circuit (circuit being made up of R11, C11) ground connection, first relay K 1 and the second relay K 2 are connected in parallel respectively through contact 4 and contact 5, are connected mains electricity input end by contact 2, connected inverter output end by contact 3 and connect loading interfaces by contact 1, and the first relay K 1 and the second relay K 2 electrically connect with the first photoelectrical coupler U1 and the second photoelectrical coupler U2 respectively through contact 2.
Wherein, the first relay K 1 is electrically connected with 2 feet of the first photoelectrical coupler U1 and 1 foot of the second photoelectrical coupler U2 by contact 2; Second relay K 2 is electrically connected with 1 foot of the first photoelectrical coupler U1 and 2 feet of the second photoelectrical coupler U2 by contact 2.
Another input of twin voltage comparator integrated circuit U3 passes through the 2nd RC parallel circuit (circuit being made up of R22, C22) ground connection, and is connected by the 3rd resistance R3 and 5V voltage; The outfan of twin voltage comparator integrated circuit U3 is connected by the 4th resistance R4 and 5V voltage, and by the 5th resistance R5 and external connection.
Fig. 2 is a kind of application schematic diagram switching circuit of the present utility model, as in figure 2 it is shown, in the present embodiment, AC_IN connects mains electricity input end, and inverter connects inverter output end, and ACOUT is loading interfaces, P5, P6 are power input interface, and P4 is that inverter output controls interface; Civil power input (P1) contact relay normally-closed contact (K1_2, K2_2), inverter exports (P2) relay termination normally opened contact (K1_3, K2_3), power detection circuit detection city of city electricity condition, when civil power is normal, positive half cycle voltage AC_IN_L returns to AC_IN_N through C2, R2, conducting light Rhizoma Nelumbinis U2, + 5V voltage arrives U32 foot through light Rhizoma Nelumbinis U2, and now U32 foot is high level, and U32 foot voltage is higher than U33 foot voltage, U31 foot output high level, this signal is sent to Micro-processor MCV detection port;Negative half period voltage AC_IN_N is through C1, light Rhizoma Nelumbinis U11 foot, 2 feet, R1 returns to AC_IN_L, conducting light Rhizoma Nelumbinis U1, + 5V voltage arrives U32 foot through light Rhizoma Nelumbinis U1, now U32 foot is high level, U32 foot voltage is higher than U33 foot voltage, U31 foot output high level, this signal is sent to Micro-processor MCV detection port, after microprocessor accepts information, microprocessor sets low I/0 foot, 2 feet, audion Q1 is not turned on, relay K 1, K2 is switched to normally-closed contact, civil power AC_IN_L passes through relay K 1 normally-closed contact 2, 1 foot arrives AC_L, civil power AC_IN_N passes through relay K 2 normally-closed contact 2, 1 foot arrives AC_N, realizing civil power is load supplying, complete inversion to switch to civil power. assignment 19 foot is high level simultaneously, and this high level, through R8,1 foot of light Rhizoma Nelumbinis U4,2 feet, turns on light Rhizoma Nelumbinis U4, thereby through P4 port controlling inverter duty, forbids that inverter exports. when civil power power-off, light Rhizoma Nelumbinis U1, U2 is in not on-state, now 2 feet of U3 are low level, the level of 3 feet of U3 is higher than the level of 2 feet, thus the 1 foot output low level of U3, this signal is sent to MCU and detects port, after microprocessor accepts information, set high I/0 foot, 2 feet, audion Q1 turns on, relay K 1, K2 is switched to normally opened contact, inversion output INV_L is by relay K 1 normally opened contact 3, 1 foot arrives AC_L, inversion output INV_N is by relay K 2 normally opened contact 3, 1 foot arrives AC_N, realize inversion and be output as load supplying, complete civil power to switch to inversion.
The one switching circuit that this utility model provides, by city's electricity condition is detected, such that it is able to carry out the switching of load supplying according to testing result so that dependable performance, and simple in construction, cost are low.
Last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, it is not intended to limit; Although this utility model being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of this utility model.
Claims (3)
1. a switching circuit, it is characterized in that, including the first photoelectrical coupler in parallel and the second photoelectrical coupler, also include the first relay, the second relay and twin voltage comparator integrated circuit, 1 foot of described first photoelectrical coupler is connected to the first electric capacity, 2 feet are connected to the first resistance, 1 foot of described second photoelectrical coupler is connected to the second electric capacity, 2 feet are connected to the second resistance, and 4 feet of described first photoelectrical coupler and the second photoelectrical coupler pass through the 3rd capacity earth; One input of 3 feet of described first photoelectrical coupler and the second photoelectrical coupler and described twin voltage comparator integrated circuit is by a RC parallel circuit ground connection; Described first relay and the second relay be connected in parallel respectively through contact 4 and contact 5, connected mains electricity input end by contact 2, connected inverter output end by contact 3 and connects loading interfaces, described first relay and the second relay by contact 1 electrically connects with described first photoelectrical coupler and the second photoelectrical coupler respectively through contact 2.
2. a kind of switching circuit according to claim 1, it is characterised in that described first relay is electrically connected with 2 feet of described first photoelectrical coupler and 1 foot of the second photoelectrical coupler by contact 2;Described second relay is electrically connected with 1 foot of described first photoelectrical coupler and 2 feet of the second photoelectrical coupler U2 by contact 2.
3. a kind of switching circuit according to claim 1 and 2, it is characterised in that another input of described twin voltage comparator integrated circuit passes through the 2nd RC parallel circuit ground connection, and is connected with 5V voltage by the 3rd resistance; The outfan of described twin voltage comparator integrated circuit is connected with 5V voltage by the 4th resistance, and by the 5th resistance and external connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521098749.0U CN205304385U (en) | 2015-12-25 | 2015-12-25 | A switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521098749.0U CN205304385U (en) | 2015-12-25 | 2015-12-25 | A switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205304385U true CN205304385U (en) | 2016-06-08 |
Family
ID=56473543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521098749.0U Expired - Fee Related CN205304385U (en) | 2015-12-25 | 2015-12-25 | A switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205304385U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111146945A (en) * | 2019-12-30 | 2020-05-12 | 洛阳隆盛科技有限责任公司 | High-voltage and low-voltage switching circuit and method based on high-voltage relay |
-
2015
- 2015-12-25 CN CN201521098749.0U patent/CN205304385U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111146945A (en) * | 2019-12-30 | 2020-05-12 | 洛阳隆盛科技有限责任公司 | High-voltage and low-voltage switching circuit and method based on high-voltage relay |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20201225 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |