CN201398073Y - Novel power supply safety protection system - Google Patents
Novel power supply safety protection system Download PDFInfo
- Publication number
- CN201398073Y CN201398073Y CN2009200727843U CN200920072784U CN201398073Y CN 201398073 Y CN201398073 Y CN 201398073Y CN 2009200727843 U CN2009200727843 U CN 2009200727843U CN 200920072784 U CN200920072784 U CN 200920072784U CN 201398073 Y CN201398073 Y CN 201398073Y
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- power supply
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Abstract
The utility model discloses a novel power supply safety protection system comprising an overvoltage protection circuit, and is characterized in that the system further comprises an anti-reverse connection circuit, wherein, the overvoltage protection circuit is made up of a varistor and a transient voltage suppressor, one end of the varistor is connected to an input end 1 and the positive pole of apower supply, the other end thereof is connected to an output end 2 and the earthing terminal, the positive terminal of the transient voltage suppressor is connected to the output end 2 and the earthing terminal, the negative terminal thereof is connected to the input end 1, the anti-reverse connection circuit comprises a relay contact protection circuit and a branch circuit, the relay contact protection circuit is connected in series between the positive pole and the input end 1 of the power supply, one end of the branch circuit is connected to the positive pole of the power supply and the other end thereof is connected to the output end 2. The utility model realizes a reverse connection protection circuit featuring small current-controlled heavy current, low power consumption and high reliability, and therefore has the benefits of ensuring correct pole connection of an input power supply, and effectively protecting the sophisticated components in the internal circuit of the input power supply, thereby guaranteeing normal and reliable operation of the power supply in an electronic circuit.
Description
Technical field
The utility model relates to a kind of power protecting circuit, is specifically related to a kind of novel power supply safety system.
Background technology
Power protecting circuit uses diode in the prior art, causes power consumption too big, can not realize big Current Control.The excess voltage protection of not charging into is subjected to the damage of various surge pulses easily; When user's electric power polarity connects inverse time accidentally, the precision components in the badly damaged electronic circuit.
Summary of the invention
The purpose of this utility model provides the novel power supply safety system, and this circuit can carry out breakpoint affirmation and automatic recovery device operation, and does not influence the communication function of node, can guarantee the power supply normal reliable operation of communicating circuit.
For achieving the above object, the utility model has adopted following technical scheme:
A kind of novel power supply safety system, it comprises excess voltage protection, is characterized in: also comprise reverse-connection preventing circuit;
Described excess voltage protection comprises at least one piezo-resistance and at least one Transient Voltage Suppressor;
Described piezo-resistance one end is connected with positive source with input 1, and its other end is connected with earth terminal with input 2;
The anode of described Transient Voltage Suppressor is connected with earth terminal with output 2, and its negative terminal is connected with output 1;
Described reverse-connection preventing circuit comprises relay contact protection circuit and collateral branch's circuit;
Described relay contact protection circuit is serially connected between positive source and the output 1;
Described collateral branch circuit one end is connected with positive source, and its other end is connected with output 2.
Above-mentioned novel power supply safety system, wherein, described relay contact protection circuit is made up of relay J, K switch 1, capacitor C Y1;
One end of described K switch 1 is connected with the end of capacitor C Y1, positive source and input 1, and the other end of K switch 1 is connected with an end of output 1, relay J coil;
The described relay J coil other end is connected with the collateral branch circuit.
Above-mentioned novel power supply safety system, wherein, described collateral branch circuit comprises K switch 2, diode D1, D2;
One end of described K switch 2 is connected with positive source and input 1, and the other end of K switch 2 is connected with the negative pole of diode D1 and the other end of relay J coil;
The anode of described diode D1 is connected with an end of relay J coil and the anode of diode D2;
The negative terminal of described diode D2 is connected with output 2 with earth terminal.
The utility model compared with prior art beneficial effect is embodied in:
1, the utility model is owing to be provided with excess voltage protection, and the voltage clamp that makes the I/O end is protected the precision components in the electronic circuit effectively in a predetermined value, avoids the damage of various surge pulses;
2, the utility model is owing to be provided with diode D1 and relay coil composition relay contact protection circuit, and wherein capacitor C Y1 plays the contact to open, fashionable electric arc inhibitory action;
3, the utility model is owing to be provided with collateral branch's circuit, if input terminal voltage polarity connects instead, when K switch 2 is closed, because of the not conducting of reversal connection of rectifier diode D2, then relay coil does not form the loop, its not adhesive of contact, and entire circuit opens circuit.Otherwise, circuit turn-on then.Guarantee the correct connection polarity of its input power supply with this.
Description of drawings
Fig. 1 is the utility model novel power supply safety system schematic diagram.
Embodiment
See also shown in Figure 1:
A kind of novel power supply safety system, it comprises excess voltage protection and reverse-connection preventing circuit; Excess voltage protection comprises at least one piezo-resistance VDR and at least one Transient Voltage Suppressor TVS (Transient Voltage Suppressor is called for short TVS); Piezo-resistance VDR one end is connected with positive source with input 1, and its other end is connected with earth terminal SGND with input 2; The anode of Transient Voltage Suppressor TVS is connected with earth terminal SGND with output 2, and its negative terminal is connected with output 1; Piezo-resistance VDR and Transient Voltage Suppressor TVS are separately positioned on input, output; make input, output end voltage be clamped on a predetermined value; the infringement that protective circuit avoids charging into voltage during the abnormal overvoltage that occurs in suppressing circuit; protect the precision components in the electronic circuit effectively, avoid the damage of various surge pulses.
Reverse-connection preventing circuit comprises relay contact protection circuit and collateral branch's circuit; Relay contact protection circuit is serially connected between positive source and the output 1; Collateral branch's circuit one end is connected with positive source, and its other end is connected with output 2.Relay contact protection circuit is made up of relay J, K switch 1, capacitor C Y1; One end of K switch 1 is connected with the end of capacitor C Y1, positive source and input 1, and the other end of K switch 1 is connected with an end of output 1, relay J coil; The relay J coil other end is connected with the collateral branch circuit.Capacitor C Y1 is the electric arc inhibitory action when playing the contact opening and closing.
Collateral branch's circuit comprises K switch 2, diode D1, D2; One end of K switch 2 is connected with positive source and input 1, and the other end of K switch 2 is connected with the negative pole of diode D1 and the other end of relay J coil; The anode of diode D1 is connected with an end of relay J coil and the anode of diode D2; The negative terminal of diode D2 is connected with output 2 with earth terminal.Connect instead if work as input terminal voltage polarity, after K switch 2 was closed, because of the not conducting of reversal connection of diode D2, then the relay J coil did not form the loop, its not adhesive of contact, and entire circuit opens circuit.Otherwise, relay J adhesive K1 then, circuit turn-on.Correctly connect with this polarity of guaranteeing its input power supply.
The utility model has been realized the big electric current of a kind of little Current Control, and is low in energy consumption, the reverse-connection protection circuit that reliability is high.Guarantee the correct connection polarity of its input power supply, effectively protect the precision components in the internal circuit, thereby guarantee the power supply normal reliable operation in the electronic circuit.
Claims (3)
1, a kind of novel power supply safety system, it comprises excess voltage protection, it is characterized in that: also comprise reverse-connection preventing circuit;
Described excess voltage protection comprises at least one piezo-resistance and at least one Transient Voltage Suppressor;
Described piezo-resistance one end is connected with positive source with input 1, and its other end is connected with earth terminal with input 2;
The anode of described Transient Voltage Suppressor is connected with earth terminal with output 2, and its negative terminal is connected with output 1;
Described reverse-connection preventing circuit comprises relay contact protection circuit and collateral branch's circuit;
Described relay contact protection circuit is serially connected between positive source and the output 1;
Described collateral branch circuit one end is connected with positive source, and its other end is connected with output 2.
2, novel power supply safety system according to claim 1 is characterized in that: described relay contact protection circuit is made up of relay J, K switch 1, capacitor C Y1;
One end of described K switch 1 is connected with the end of capacitor C Y1, positive source and input 1, and the other end of K switch 1 is connected with an end of output 1, relay J coil;
The described relay J coil other end is connected with the collateral branch circuit.
3, novel power supply safety system according to claim 1 is characterized in that: described collateral branch circuit comprises K switch 2, diode D1, D2;
One end of described K switch 2 is connected with positive source and input 1, and the other end of K switch 2 is connected with the negative pole of diode D1 and the other end of relay J coil;
The anode of described diode D1 is connected with an end of relay J coil and the anode of diode D2;
The negative terminal of described diode D2 is connected with output 2 with earth terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200727843U CN201398073Y (en) | 2009-05-22 | 2009-05-22 | Novel power supply safety protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200727843U CN201398073Y (en) | 2009-05-22 | 2009-05-22 | Novel power supply safety protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201398073Y true CN201398073Y (en) | 2010-02-03 |
Family
ID=41620603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200727843U Expired - Fee Related CN201398073Y (en) | 2009-05-22 | 2009-05-22 | Novel power supply safety protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201398073Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231598A (en) * | 2011-06-08 | 2011-11-02 | 三一重工股份有限公司 | Power supply circuit |
| CN102496923A (en) * | 2011-11-14 | 2012-06-13 | 株洲南车时代电气股份有限公司 | Input circuit with reverse connection preventing protection |
| CN104242622A (en) * | 2013-06-06 | 2014-12-24 | 艾默生网络能源系统北美公司 | Soft start circuit and DC conversion power supply |
| CN112268357A (en) * | 2020-10-12 | 2021-01-26 | 青岛海信日立空调系统有限公司 | Air conditioner communication control circuit and air conditioner |
-
2009
- 2009-05-22 CN CN2009200727843U patent/CN201398073Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102231598A (en) * | 2011-06-08 | 2011-11-02 | 三一重工股份有限公司 | Power supply circuit |
| CN102231598B (en) * | 2011-06-08 | 2014-01-15 | 三一重工股份有限公司 | Power supply circuit |
| CN102496923A (en) * | 2011-11-14 | 2012-06-13 | 株洲南车时代电气股份有限公司 | Input circuit with reverse connection preventing protection |
| CN102496923B (en) * | 2011-11-14 | 2016-10-19 | 株洲南车时代电气股份有限公司 | A kind of input circuit of anti-reverse protection |
| CN104242622A (en) * | 2013-06-06 | 2014-12-24 | 艾默生网络能源系统北美公司 | Soft start circuit and DC conversion power supply |
| CN112268357A (en) * | 2020-10-12 | 2021-01-26 | 青岛海信日立空调系统有限公司 | Air conditioner communication control circuit and air conditioner |
| CN112268357B (en) * | 2020-10-12 | 2022-06-10 | 青岛海信日立空调系统有限公司 | Air conditioner communication control circuit and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Shanghai Boom Fiber Sensing Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20120522 |