CN1148073C - Single board of exchanger for implementing hot exchange and its backplate - Google Patents
Single board of exchanger for implementing hot exchange and its backplateInfo
- Publication number
- CN1148073C CN1148073C CNB991240278A CN99124027A CN1148073C CN 1148073 C CN1148073 C CN 1148073C CN B991240278 A CNB991240278 A CN B991240278A CN 99124027 A CN99124027 A CN 99124027A CN 1148073 C CN1148073 C CN 1148073C
- Authority
- CN
- China
- Prior art keywords
- veneer
- connector
- input filter
- circuit
- filter circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The present invention discloses a single board for realizing the hot insertion and pull of single boards of an exchanger and a back board thereof. The input end of an input filter circuit of the single board of the exchanger is connected with a slow start-up circuit, and the length of a positive and negative power supply connector of the back board, a signal ground connector, a protective ground connector and a connector for signal lines is averaged to be about 2cm. Therefore, the present invention can avoid the problems that when the single board is inserted and pulled, power supply current peaks of the single board can impact other single boards in the exchanger through power supply lines on the back board to cause the result that other single boards work disorderly or reset and sparks due to inserting and pulling the single board can result in the fact that the power supply connector can be burnt out by electric arcs.
Description
The present invention relates to switch, relate more specifically to a kind of veneer of realizing the hot plug of switch veneer.
Most of switches have veneer and special backboard.Backboard is provided with the groove position for the veneer of all switch, and all veneers all are inserted on the backboard, and is that media and other veneer communicate with the backboard.Power connector, signal connector, signal ground connector and protection ground connector are arranged on the backboard, and the length of these connectors all is identical design.Backboard role in the system of switch is summarized as follows: provide the groove position for veneer 1.; 2. the signal between all veneers connects and all to pass through backboard; 3. provide 48V power supply for all veneers.
Include power module, input filter circuit on the veneer, also corresponding the offering and power connector, signal connector, the signal ground connector of backboard and supply socket, signal connector socket, signal ground connector body and the protection ground connector body of protecting the ground connector of a side of veneer.
The switch of under normal circumstances working is difficult for accepting the plug veneer arbitrarily under the situation of not cutting off the power supply, if arbitrarily plug can be in particular in:
1, plug during veneer the source current spike of veneer can impact to other veneer in the switch by the 48V supply lines on the backboard, cause other veneer work chaotic or reset;
Can produce spark when 2, plugging veneer, the time has been grown and will cause the power connector on backboard and the veneer to be burnt out by electric arc, causes single-board slot unavailable, so restricted to the plug number of times;
3, power supply needed certain hour to start when veneer inserted switch, therefore just insert for some time in, the logical circuit of veneer does not normally work on power, and the signal ground of being inserted the logical circuit of veneer this moment may also not be connected with the signal ground of switch, but this moment, the input and output side of this veneer logical circuit coupled together by backboard and other veneer, in this case, the electronic device that belongs to the veneer of working on electronic device and the switch on this veneer directly is connected, and can cause electronic device on the veneer to burn system signal disorder with switch.
For this reason, the objective of the invention is the problem that in the hot plug veneer, exists at above-mentioned switch, propose a kind of veneer of realizing the hot plug of switch veneer, to finish the reliable hot plug between veneer and the switch.Make switch in the work of continous-stable, realize a series of technical methods of veneer hot plug.Promptly under the situation of not cutting off the power supply, realize freely changing of switch veneer, system is not produced injurious effects.
To achieve these goals, the present invention adopts following scheme:
Can realize the veneer of switch veneer hot plug and the common the same power module that comprises of veneer; input filter circuit; power module provides power supply for veneer; input filter circuit is by input filter capacitor; filter inductance constitutes; one side of veneer offers respectively the positive-negative power connector with backboard; signal connector; the positive-negative power socket that signal ground connector and protection ground connector plug; the signal connector socket; signal ground connector body and protection ground connector body; the input of the output termination power module of input filter circuit, institute's difference is: the input of described input filter circuit is connected to a soft-start circuit.
Because the present invention is connected to a soft-start circuit with the input of the input filter circuit of the veneer of switch, source current spike of veneer can impact to other veneer in the switch by the power supply supply lines on the backboard when avoiding plugging veneer with this, causes other veneer work chaotic or reset; Eliminate the spark that switch plug veneer causes simultaneously, power connector is burnt out by electric arc; In addition, in hot plug process, before the holding wire contact, give the circuit supply of veneer in advance, signal ground is connected avoid signal disorder and the components and parts that burn on the veneer in advance.
Below in conjunction with drawings and Examples, the present invention is done one explains:
Fig. 1 is input filter circuit and soft-start circuit principle schematic on veneer of the present invention, backboard grafting principle and the veneer thereof.
Fig. 2 is veneer of the present invention, backboard Plug Division separation structure schematic diagram.
Please consult Fig. 1 simultaneously; shown in Figure 2; the present invention includes power module (being also referred to as the secondary power supply module) 11; input filter circuit 12; power module 11 provides power supply for veneer 10; input filter circuit 12 is by input filter capacitor C2; C3; C4; filter inductance L1; L2 constitutes; one side of veneer 10 (straight dashed line right side) offers respectively the positive-negative power connector 201 with backboard 20 (straight dashed line left side); 202; signal connector 203; the positive-negative power socket 101 that signal ground connector 204 and protection ground connector 205 plug; 102; signal connector socket 103; signal ground connector body 104 and protection ground connector body 105, the input of the output termination power module 12 of input filter circuit 12.The input of described input filter circuit 12 also is connected to a soft-start circuit 13 in addition, is exactly soft-start circuit 13 in the empty frame of Fig. 1.Soft-start circuit 13 is connected between the positive-negative power socket 101,102 and input filter circuit 12 of veneer 10.Like this, filter circuit 12 between the power module 11 is arranged into after this soft-start circuit 13, both played effect (preventing the spark that electric capacity and inductance bring when plugging), helped the filtering of the switch noise of power module 11 again filter element in the filter circuit 13 and backboard 20 isolation.
This soft-start circuit 13 includes a field effect transistor BG1, transistor BG2, resistance R 1, R2, R3, R4, capacitor C 1, field effect transistor BG1 is as switching tube, its drain electrode is connected to input filter circuit as the output of soft-start circuit, grid is connected to the bleeder circuit mid point that is made of resistance R 1, R2, and source electrode is connected to negative supply socket on the veneer by current-limiting resistance R3; Resistance R 1, R2 are serially connected with between the positive-negative power socket; Resistance R 4, capacitor C 1 are serially connected with between the grid of negative supply socket and field effect transistor BG1; The grid of the collector electrode of transistor BG2 and field effect transistor BG1 joins, emitter is connected to the negative supply socket, the source electrode of base stage and field effect transistor BG1 joins.
Its principles illustrated is as follows: after veneer 10 inserts backboard 20, power supply charges to capacitor C 1 by R1 and resistance R 4, voltage on the C1 rises gradually, when reaching 2～3V, field effect transistor BG1 conducting, for 11 modules of the power supply on the veneer 10 (secondary power supply module) provide current supply circuit, thus the work of secondary power supply module.Like this, just make postpone several milliseconds slightly the start-up time of secondary power supply module, and prolonged start-up time, avoided the due to voltage spikes on plug spark and the power supply.Transistor BG2 is the feedback device that is provided with for the electric current that flows through the secondary power supply module is carried out current limliting in the soft-start circuit 13.Transistor BG2 monitors the electric current that the secondary power supply module flows through by the pressure drop of its B-E knot parallel resistance R3, and by the grid of control field effect transistor BG1 this electric current is limited in the limited scope.For the situation of using common small-power double pole triode, the electric current that flows through the secondary power supply module is no more than 0.6V/R3.For example, R3 gets 0.2 ohm, and then electric current is limited in below the 3A.Be noted that in design the electric current of secondary power supply module actual absorption all is less than 0.6V/R3 in any case, otherwise BG1 is easily because overheated and burn.That is to say, at first will consider the maximum current Imax that the secondary power supply module might absorb, make the cut-off current of soft-start circuit 13 greater than Imax by adjusting R3 then.
With veneer 10 correspondingly, be provided with positive-negative power connector 201,202, holding wire connector 203, signal ground connector 204, the protection ground connector 205 that can insert veneer positive-negative power socket 101,102, signal connector socket 103, signal ground connector body 104 and protection ground connector body 105 respectively in backboard 20 1 sides.The length that the length of the positive-negative power connector 201,202 of described backboard 20, signal ground connector 204, protection ground connector 205 all is designed to be longer than holding wire connector 203.Like this; guarantee when grafting backboard 20; positive-negative power connector 201,202 and signal ground connector 204, protection ground connector 205 at first enter positive-negative power socket 101,102, signal ground connector body 104 and the protection ground connector body 105 of veneer 1; when holding wire contacts; the power supply of veneer 10 is normal; ground wire has also connected ready, has avoided the damage device and has caused the signal disorder.If the speed of plug is 0.5m/S, positive-negative power connector 201,202 is than the long 2CM of holding wire connector, and then the time difference from the time of contact T1 of the power connector of veneer and backboard to the time of contact T2 of the holding wire of veneer and backboard is 40mS.Then require soft-start circuit 13 in this 40mS, to start.Therefore capacitor C 1 can not be too big.Usually, at R1, R2 is respectively that C1 gets about 2uF under the situation of 15K and 5K, can guarantee that soft-start circuit starts in 10mS.
In an embodiment of the present invention, resistance R 1 in the soft-start circuit 13 is selected the golden film resistance of 15K0.5W for use, field effect transistor BG1 selects IRF540 for use, and transistor BG2 selects BC847 for use, and R3 selects for use two 0.1 ohm of 1W resistance to connect, also can use the resistance of 0.1 ohm of 1W.Capacitor C 1 is selected the tantalum electrochemical capacitor of 2.2uF16V for use.Other element is not done special requirement.And electric positive and negative source connector 201,202 in the backboard 20, the length of signal ground connector 204 and protection ground connector 205 is than the long approximately 2CM of length of holding wire connector 203.
Claims (4)
1; a kind of veneer of realizing the hot plug of switch veneer; comprise power module; input filter circuit; power module provides power supply for veneer; input filter circuit is by input filter capacitor; filter inductance constitutes; one side of veneer offers respectively the positive-negative power connector with backboard; signal connector; the positive-negative power socket that signal ground connector and protection ground connector plug; the signal connector socket; signal ground connector body and protection ground connector body; the input of the output termination power module of input filter circuit, it is characterized in that: the input of described input filter circuit is connected to a soft-start circuit.
2, the veneer of realizing the hot plug of switch veneer as claimed in claim 1 is characterized in that: described soft-start circuit is connected between the positive-negative power socket and input filter circuit of veneer.
3, the veneer of realizing the hot plug of switch veneer as claimed in claim 2, it is characterized in that: described soft-start circuit includes a field effect transistor BG1, transistor BG2, resistance R 1, R2, R3, R4, capacitor C 1, field effect transistor BG1 is as switching tube, its drain electrode is connected to input filter circuit as the output of soft-start circuit, grid is connected to the bleeder circuit mid point that is made of resistance R 1, R2, and source electrode is connected to negative supply socket on the veneer by current-limiting resistance R3; Resistance R 1, R2 are serially connected with between the positive-negative power socket; Resistance R 4, capacitor C 1 are serially connected with between the grid of negative supply socket and field effect transistor BG1; The grid of the collector electrode of transistor BG2 and field effect transistor BG1 joins, emitter is connected to the negative supply socket, the source electrode of base stage and field effect transistor BG1 joins.
4, the veneer of realizing the hot plug of switch veneer as claimed in claim 3 is characterized in that: the value of described current-limiting resistance R3 is between 0.1 Ω-0.2 Ω; Described capacitor C 1 value is being roughly 2uF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991240278A CN1148073C (en) | 1999-11-18 | 1999-11-18 | Single board of exchanger for implementing hot exchange and its backplate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991240278A CN1148073C (en) | 1999-11-18 | 1999-11-18 | Single board of exchanger for implementing hot exchange and its backplate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1297312A CN1297312A (en) | 2001-05-30 |
| CN1148073C true CN1148073C (en) | 2004-04-28 |
Family
ID=5283124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991240278A Expired - Fee Related CN1148073C (en) | 1999-11-18 | 1999-11-18 | Single board of exchanger for implementing hot exchange and its backplate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1148073C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7213163B2 (en) * | 2003-06-25 | 2007-05-01 | International Business Machines Corporation | Restoring power in a hot swappable multi-server data processing environment |
| CN100550783C (en) * | 2003-09-29 | 2009-10-14 | 华为技术有限公司 | The detection of hot plug and processing method |
| CN100353642C (en) * | 2004-07-31 | 2007-12-05 | 华为技术有限公司 | Method and device of realizing hot plug for power distribution singleboard |
| CN100409590C (en) * | 2004-10-13 | 2008-08-06 | 中兴通讯股份有限公司 | Equiment for realizing high usability of system |
| CN100438440C (en) * | 2006-06-20 | 2008-11-26 | 华为技术有限公司 | Single board and method for controlling power supply of it |
| CN101577495B (en) * | 2008-05-07 | 2011-06-15 | 群康科技(深圳)有限公司 | Current converting circuit |
| US8441151B2 (en) * | 2009-11-24 | 2013-05-14 | Delta Electronics, Inc. | Power supply with arc flash protection mechanism and data-processing system employing same |
| CN102497308B (en) * | 2011-11-30 | 2014-08-27 | 福建星网锐捷网络有限公司 | Multiple slot switch |
| CN103076785B (en) * | 2012-12-31 | 2014-12-24 | 北京格林伟迪科技有限公司 | Hot plug control device for Ethernet switch and industrial Ethernet switch |
| CN104967577B (en) * | 2015-06-25 | 2019-09-03 | 北京百度网讯科技有限公司 | SAS switch and server |
| CN105635853B (en) * | 2016-01-06 | 2018-09-21 | 武汉虹信通信技术有限责任公司 | In a kind of LTE communication product complete machine system setting method |
| CN116340231B (en) * | 2023-03-29 | 2023-12-19 | 北京华电众信技术股份有限公司 | Hot plug protection circuit for main board |
-
1999
- 1999-11-18 CN CNB991240278A patent/CN1148073C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1297312A (en) | 2001-05-30 |
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| C10 | Entry into substantive examination | ||
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| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: Huawei Technologies Co., Ltd. Applicant before: Huawei Technology Co., Ltd., Shenzhen City |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SHENZHEN HUAWEI TECHNOLOGY CO., LTD TO: HUAWEI TECHNOLOGY CO., LTD. |
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| 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: 20040428 Termination date: 20151118 |
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| EXPY | Termination of patent right or utility model |