CN203289394U - A switch circuit and a communication power supply - Google Patents
A switch circuit and a communication power supply Download PDFInfo
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- CN203289394U CN203289394U CN2013202952541U CN201320295254U CN203289394U CN 203289394 U CN203289394 U CN 203289394U CN 2013202952541 U CN2013202952541 U CN 2013202952541U CN 201320295254 U CN201320295254 U CN 201320295254U CN 203289394 U CN203289394 U CN 203289394U
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- control signal
- power
- relay
- storage battery
- switching tube
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Abstract
The utility model discloses a switch circuit and a communication power supply. The switch circuit comprises a relay, a switch tube and a storage battery. The normally open contact of the relay, the switch tube and the storage battery are connected in series, and two ends formed after the series connection are direct current power supply terminals; the switch tube is a controllable semiconductor power electronic device; a power down control signal of a coil of the relay and a turn-off control signal of the switch tube are synchronous, or the power down control signal of the coil of the relay is delayed relative to the turn-off control signal of the switch tube. According to the technical scheme, the phenomena of breaking arc discharge of the relay can be prevented.
Description
Technical field
The utility model relates to electric and electronic technical field, relates in particular to a kind of switching circuit and communication power supply of storage battery.
Background technology
In prior art, in small-power electricity consumption occasion, the relays that adopt connect the switch of DC power supply more as storage battery, as shown in Figure 1, storage battery GB and relay contact S series connection, two ends after series connection are as the DC power supply terminals, and the end of relay coil K connects the negative pole of storage battery GB, and the other end is the power-on and power-off control signal terminals EN of relay coil K.Power-on and power-off by control relay coil K can control relay contact S closed and disconnected, and then control the power-on and power-off of storage battery GB.
Yet because the breaking capacity of relay is very little, the electric current when relay contact S disconnects in circuit may surpass the breaking current that relay contact S can bear, and disjunction arcing phenomenon occurs, to the relay injury, and then affects the reliability of circuit.
The utility model content
The utility model embodiment provides a kind of switching circuit and communication power supply, in order to avoid the generation of relay disjunction arcing phenomenon.
The utility model embodiment provides a kind of switching circuit, comprises relay, switching tube and storage battery, wherein:
The normally opened contact of described relay, described switching tube and the series connection of described storage battery, the two ends after series connection are the DC power supply terminals; Described switching tube is controlled semiconductor power electronic device;
The lower electric control signal of the coil of described relay and the shutoff control signal of described switching tube are synchronous, perhaps postpone the shutoff control signal in described switching tube.
The utility model embodiment also provides a kind of communication power supply, comprises said switching circuit.
The beneficial effects of the utility model comprise:
In the switching circuit that the utility model embodiment provides, with relay contact and switching tube series connection, jointly as storage battery, connect the switch of DC power supply, when electric under controlling storage battery, switching tube can disconnect prior to relay contact, therefore when relay contact disconnects, does not bear breaking current, and then avoided the generation of relay disjunction arcing phenomenon, improved circuit reliability.
Description of drawings
Accompanying drawing is used to provide further understanding of the present utility model, and forms the part of specification, with the utility model embodiment one, is used from explanation the utility model, does not form restriction of the present utility model.In the accompanying drawings:
Fig. 1 is switching circuit schematic diagram of the prior art;
The switching circuit schematic diagram that Fig. 2 provides for the utility model embodiment;
The switching circuit schematic diagram that Fig. 3 provides for the utility model embodiment 1;
The switching circuit schematic diagram that Fig. 4 provides for the utility model embodiment 2;
The structure of driving unit schematic diagram that Fig. 5 provides for the utility model embodiment 2;
The structure of driving unit detailed maps that Fig. 6 provides for the utility model embodiment 2.
Embodiment
In order to provide the implementation of avoiding relay disjunction arcing phenomenon to produce, the utility model embodiment provides a kind of switching circuit and communication power supply, below in conjunction with Figure of description, preferred embodiment of the present utility model is described, be to be understood that, preferred embodiment described herein only is used for description and interpretation the utility model, and is not used in restriction the utility model.And in the situation that do not conflict, embodiment and the feature in embodiment in the application can make up mutually.
The utility model embodiment provides a kind of switching circuit, as shown in Figure 2, comprises relay, switching tube and storage battery GB, wherein:
The normally opened contact S of relay, switching tube and storage battery GB series connection, the two ends after series connection are the DC power supply terminals; This switching tube is controlled semiconductor power electronic device; The lower electric control signal of the coil K of this relay and the shutoff control signal of this switching tube are synchronous, perhaps postpone the shutoff control signal in this switching tube.
Better, the end of the coil K of this relay connects the negative pole of this storage battery GB, and the other end is the power-on and power-off control signal terminals EN1 of the coil K of this relay.
Above-mentioned switching tube is specifically as follows triode, insulated gate bipolar transistor IGBT etc., and is better, and switching tube can be field effect transistor M OS pipe, and response is very fast, and loss is less.
When switching tube was specially triode, the base stage of triode was as the break-make control signal terminals EN2 of switching tube; When switching tube was specially IGBT, the grid of IGBT was as the break-make control signal terminals EN2 of switching tube; When switching tube was specially metal-oxide-semiconductor, the grid of metal-oxide-semiconductor was as the break-make control signal terminals EN2 of switching tube.
, below in conjunction with accompanying drawing, with specific embodiment, the said switching circuit that the utility model provides is elaborated.
Embodiment 1:
Figure 3 shows that the switching circuit that the utility model embodiment 1 provides, comprise relay, metal-oxide-semiconductor Q and storage battery GB, wherein:
The end of the normally opened contact S of relay is the negative terminals of DC power supply, and the other end connects the drain electrode of metal-oxide-semiconductor Q, and the source electrode of metal-oxide-semiconductor Q connects the negative pole of storage battery GB, the positive terminals of just very DC power supply of storage battery GB; The end of the coil K of relay connects the negative pole of storage battery GB, and the other end is the power-on and power-off control signal terminals EN1 of the coil K of relay; The grid of metal-oxide-semiconductor Q is the break-make control signal terminals EN2 of metal-oxide-semiconductor Q.
Better, metal-oxide-semiconductor Q is N channel-type metal-oxide-semiconductor.
The switching circuit that provides in order to further illustrate the utility model embodiment 1, below set forth its operation principle.
When controlling storage battery GB and power on, break-make control signal terminals EN2 input the second high level signal of metal-oxide-semiconductor Q, i.e. the conducting control signal of metal-oxide-semiconductor Q, metal-oxide-semiconductor Q conducting; The power-on and power-off control signal terminals EN1 of the coil K of relay input the first high level signal, i.e. the upper electric control signal of the coil K of relay, the coil K of relay powers on, and makes the normally opened contact S of relay closed.I.e. this moment, storage battery GB connects the line conduction of DC power supply, and storage battery GB powers on.
Under controlling storage battery GB during electricity, break-make control signal terminals EN2 input the second low level signal of metal-oxide-semiconductor Q, i.e. the shutoff control signal of metal-oxide-semiconductor Q, metal-oxide-semiconductor Q turn-offs; Input the moment of the second low level signal than the break-make control signal terminals EN2 of metal-oxide-semiconductor Q, the power-on and power-off control signal terminals EN1 while of the coil K of relay or delay input the first low level signal, it is the lower electric control signal of the coil K of relay, electricity under the coil K of relay, make the normally opened contact S of relay disconnect.I.e. this moment, the circuit that storage battery GB connects DC power supply disconnects, electricity under storage battery GB.
Yet, characteristic due to relay itself, normally opened contact S from electricity under the coil K of relay to relay disconnects and needs the time of several milliseconds, therefore no matter than moment of break-make control signal terminals EN2 input the second low level signal of metal-oxide-semiconductor Q, the power-on and power-off control signal terminals EN1 of the coil K of relay is simultaneously or postpones input the first low level signal, when the normally opened contact S of relay disconnects, metal-oxide-semiconductor Q is reliable turn-off all, so when the normally opened contact S of relay disconnected, the normally opened contact S of relay did not bear breaking current.
As seen, the switching circuit that has adopted the utility model embodiment to provide, when relay contact disconnects, do not bear breaking current, can avoid the generation of relay disjunction arcing phenomenon, improved circuit reliability.
Embodiment 2:
Figure 4 shows that the switching circuit that the utility model embodiment 2 provides, this switching circuit, except comprising relay, metal-oxide-semiconductor Q and storage battery GB, also comprises driver element, wherein:
The end of the normally opened contact S of relay is the negative terminals of DC power supply, and the other end connects the drain electrode of metal-oxide-semiconductor Q, and the source electrode of metal-oxide-semiconductor Q connects the negative pole of storage battery GB, the positive terminals of just very DC power supply of storage battery GB; The end of the coil K of relay connects the negative pole of storage battery GB, and the other end connects the five terminal of driver element; The grid of metal-oxide-semiconductor Q connects the 6th end of driver element; The first end of driver element and the second end are respectively power-on and power-off control signal terminals Rx+ and the Rx-of storage battery GB, and the 3rd end connects respectively storage battery GB positive pole and negative pole with the 4th end.This driver element after receiving the power-on and power-off control signal of storage battery GB, generates the power-on and power-off control signal of coil K of relay and the break-make control signal of metal-oxide-semiconductor Q.
In the utility model embodiment 2, this driver element concrete structure as shown in Figure 5, comprising:
The first end of driving power subelement 501 is as the 3rd end of driver element, and the second end connects the second end of filtering subelement 503, and as the 4th end of driver element, the 3rd end connects separaant unit 502 the 3rd end; Driving power subelement 501 provides driving power for separaant unit 502.
The first end of separaant unit 502 and the second end are respectively as first end and second end of driver element, and the 4th end connects the first end of filtering subelement 503, as the five terminal of driver element; The control signal of the power-on and power-off control signal isolation of 502 generations of separaant unit and storage battery GB.
The 3rd end of filtering subelement 503 is as the 6th end of driver element, and the control signal that 503 pairs of separaant unit of filtering subelement 502 generate is carried out filtering.
In the utility model embodiment 2, each subelement detailed maps as shown in Figure 6.
Better, can also comprise diode D3 in this switching circuit, the anode of diode D3 and negative electrode connect respectively the 4th end and the 3rd end of separaant unit 502, when storage battery GB reverse polarity connection, device in separaant unit 502 are played a protective role.
Better, can also comprise diode D4 in this switching circuit, be connected between the two ends of coil K of relay, after electricity under storage battery GB, the electric energy on the coil K of relay is released.
Better, can also be at metal-oxide-semiconductor Q two ends parallel voltage-stabilizing diode, to suppress peak voltage.
As seen the switching circuit that adopts the utility model embodiment to provide, can avoid the generation of relay disjunction arcing phenomenon, is easy to realize, reliability is high.
Embodiment 3:
The utility model embodiment 3 also provides a kind of communication power supply, comprises the switching circuit of above-mentioned Fig. 2-Fig. 6 shown in arbitrary.
In communication power supply, the power-on and power-off control signal of storage battery is sent by processor.
Further, can also comprise detecting unit in this communication power supply, storage battery GB polarity is detected, connect inverse time when storage battery GB being detected, processor does not send control signal, and is not damaged to guarantee circuit devcie.
Better, send on storage battery before electric control signal at processor, detecting unit also detects storage battery GB voltage and DC power supply voltage, when differences both within the specific limits, be that difference is during less than predetermined threshold value, processor just sends electric control signal on storage battery,, to avoid the powered on moment impact electric current excessive, damages circuit devcie.If the difference of storage battery GB voltage and DC power supply voltage is not less than predetermined threshold value, can regulate the output voltage of DC power supply, make both difference less than predetermined threshold value.
Better, after storage battery GB powers on, while charging, can also the charging current of storage battery GB be detected, when charging current surpasses predetermined current, the output voltage of DC power supply is regulated, make charging current less than predetermined current.
Better, after the DC power supply no-output, detecting unit detects storage battery GB voltage, and during lower than predeterminated voltage, processor sends electric control signal under storage battery when storage battery GB voltage, and to prevent storage battery GB over-discharge can, GB protects to storage battery.
In sum, the switching circuit that the utility model embodiment provides, comprise relay, switching tube and storage battery, wherein: the normally opened contact of this relay, this switching tube and the series connection of this storage battery, the two ends after series connection are the DC power supply terminals; This switching tube is controlled semiconductor power electronic device; The lower electric control signal of the coil of this relay and the shutoff control signal of this switching tube are synchronous, perhaps postpone the shutoff control signal in this switching tube.The scheme that adopts the utility model embodiment to provide, can avoid the generation of relay disjunction arcing phenomenon.
Obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model also is intended to comprise these changes and modification interior.
Claims (10)
1. a switching circuit, is characterized in that, comprises relay, switching tube and storage battery, wherein:
The normally opened contact of described relay, described switching tube and the series connection of described storage battery, the two ends after series connection are the DC power supply terminals; Described switching tube is controlled semiconductor power electronic device;
The lower electric control signal of the coil of described relay and the shutoff control signal of described switching tube are synchronous, perhaps postpone the shutoff control signal in described switching tube.
2. switching circuit as claimed in claim 1, is characterized in that, an end of the coil of described relay connects the negative pole of described storage battery, and the other end is the power-on and power-off control signal terminals of the coil of described relay.
3. switching circuit as claimed in claim 1, is characterized in that, described switching tube is specially field effect transistor M OS pipe, and the grid of described metal-oxide-semiconductor is the break-make control signal terminals of described switching tube.
4. switching circuit as claimed in claim 3, is characterized in that, described metal-oxide-semiconductor is specially N channel-type metal-oxide-semiconductor.
5. switching circuit as claimed in claim 1, is characterized in that, described switching tube is specially triode, and the base stage of described triode is the break-make control signal terminals of described switching tube.
6. switching circuit as claimed in claim 1, is characterized in that, described switching tube is specially insulated gate bipolar transistor IGBT, and the grid of described IGBT is the break-make control signal terminals of described switching tube.
7. described switching circuit as arbitrary in claim 1-6, it is characterized in that, also comprise driver element, the first end of described driver element and the second end are the power-on and power-off control signal terminals of described storage battery, the 3rd end and the 4th end connect respectively positive pole and the negative pole of described storage battery, five terminal connects the power-on and power-off control signal terminals of the coil of described relay, the break-make control signal terminals of the described switching tube of six end connecting; Described driver element after receiving the power-on and power-off control signal of described storage battery, generates the power-on and power-off control signal of coil of described relay and the break-make control signal of described switching tube.
8. switching circuit as claimed in claim 7, is characterized in that, described driver element comprises driving power subelement, separaant unit and filtering subelement, wherein:
The first end of described driving power subelement is as the 3rd end of described driver element, and the second end connects the second end of described filtering subelement, and as the 4th end of described driver element, the 3rd end connects the 3rd end of described separaant unit; Described driving power subelement provides driving power for described separaant unit;
The first end of described separaant unit and the second end are respectively as first end and second end of described driver element, and the 4th end connects the first end of described filtering subelement, as the five terminal of described driver element; The control signal of the power-on and power-off control signal isolation of the generation of described separaant unit and described storage battery;
The 3rd end of described filtering subelement is as the 6th end of described driver element; Described filtering subelement carries out filtering to the control signal that described separaant unit generates.
9. switching circuit as claimed in claim 8, it is characterized in that, described driving power subelement specifically comprises the first resistance, voltage stabilizing didoe and the first electric capacity, wherein, one end of described the first resistance is as the first end of described driving power subelement, one end of described the first electric capacity of the anodic bonding of described voltage stabilizing didoe, the second end as described driving power subelement, the other end of described the first resistance connects the negative electrode of described voltage stabilizing didoe, the other end of described the first electric capacity, as the 3rd end of described driving power subelement;
described separaant unit specifically comprises the second resistance, light-emitting diode, photistor and triode, wherein, one end of described the second resistance is as the first end of described separaant unit, the other end connects the anode of described light-emitting diode, the negative electrode of described light-emitting diode is as the second end of described separaant unit, the collector electrode of described triode is as the 3rd end of described separaant unit, base stage connects the collector electrode of described photistor, the emitter of described triode connects the emitter of described photistor, the 4th end as described separaant unit, described light-emitting diode drives described photistor,
Described filtering subelement specifically comprises the 3rd resistance, the 4th resistance and the second electric capacity, wherein, one end of described the 3rd resistance connects an end of described the second electric capacity, first end as described filtering subelement, the other end of described the second electric capacity connects an end of described the 4th resistance, as the second end of described filtering subelement, the other end of described the 3rd resistance connects the other end of described the 4th resistance, as the 3rd end of described filtering subelement.
10. a communication power supply, is characterized in that, comprises described switching circuit as arbitrary in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202952541U CN203289394U (en) | 2013-05-27 | 2013-05-27 | A switch circuit and a communication power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202952541U CN203289394U (en) | 2013-05-27 | 2013-05-27 | A switch circuit and a communication power supply |
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| Publication Number | Publication Date |
|---|---|
| CN203289394U true CN203289394U (en) | 2013-11-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202952541U Expired - Lifetime CN203289394U (en) | 2013-05-27 | 2013-05-27 | A switch circuit and a communication power supply |
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| CN (1) | CN203289394U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111244917A (en) * | 2020-03-20 | 2020-06-05 | 中国科学院电工研究所 | Multi-port direct current circuit breaker and control method |
| CN111262225A (en) * | 2018-12-03 | 2020-06-09 | 上海原动力通信科技有限公司 | Power output protection device |
| US10748724B2 (en) | 2015-12-17 | 2020-08-18 | Huawei Technologies Co., Ltd. | Power-on/off drive circuit and method for controlling power-on/off drive circuit |
-
2013
- 2013-05-27 CN CN2013202952541U patent/CN203289394U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10748724B2 (en) | 2015-12-17 | 2020-08-18 | Huawei Technologies Co., Ltd. | Power-on/off drive circuit and method for controlling power-on/off drive circuit |
| CN111262225A (en) * | 2018-12-03 | 2020-06-09 | 上海原动力通信科技有限公司 | Power output protection device |
| CN111244917A (en) * | 2020-03-20 | 2020-06-05 | 中国科学院电工研究所 | Multi-port direct current circuit breaker and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No. 1510, Kansas Avenue, lureen, Ohio, USA Patentee after: VERTIV ENERGY SYSTEMS, Inc. Address before: The United States of Ohio city F Lorain Street No. 1122 Patentee before: EMERSON NETWORK POWER, ENERGY SYSTEMS, NORTH AMERICA, Inc. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20201012 Address after: Ohio, USA Patentee after: Dimension Corp. Address before: 1510 Kansas Avenue, Loren, Ohio, USA Patentee before: VERTIV ENERGY SYSTEMS, Inc. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131113 |