CN104883041A - Protection circuit - Google Patents
Protection circuit Download PDFInfo
- Publication number
- CN104883041A CN104883041A CN201510306335.0A CN201510306335A CN104883041A CN 104883041 A CN104883041 A CN 104883041A CN 201510306335 A CN201510306335 A CN 201510306335A CN 104883041 A CN104883041 A CN 104883041A
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- CN
- China
- Prior art keywords
- voltage
- module
- power supply
- input
- power transfer
- Prior art date
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Links
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 19
- 239000010703 silicon Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract 6
- 230000001681 protective effect Effects 0.000 claims description 36
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract 7
- 230000001960 triggered effect Effects 0.000 abstract 1
- 206010049207 Adactyly Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention discloses a protection circuit, which comprises a rectification circuit module (A), a power supply conversion module and a protection circuit module, wherein the power supply conversion module comprises a first power supply conversion module (DC/DC) (B) and a second power supply conversion module (DC/DC) (D). A protection method of the protection circuit is characterized in that an input power supply is a direct-current low-voltage power supply, the power supply passes through an alternating current-direct current recognition module (E), the alternating current-direct current recognition module (E) recognizes the nature of the power supply, the power supply passes through a time-delay trigger circuit (F) after being confirmed to be safe, a silicon controlled rectifier (C) is triggered to be conducted, and thus the second power supply conversion module (DC/DC) (D) is enabled to be electrified, thereby outputting power supply voltage required by operations. Voltage of the input power supply is lower than the minimum operating voltage of the first power supply conversion module (DC/DC) (B), so that the first power supply conversion module (DC/DC) (B) is enabled not to operate.
Description
Technical field
The present invention relates to a kind of circuit, specifically a kind of protective circuit.
Background technology
Some circuit on existing market; structural design is unreasonable; generally mostly be and directly set input voltage; electrical appliance goes to select input voltage (general oligodactyly, has connect the plug of input power) here according to the operating voltage of setting themselves, can cause like this; if low-voltage electrical appliance mistake have selected high input voltage voltage; cause low-voltage electrical appliance to damage, even there is larger security incident in blast, society do not have at present a kind of circuit be provided with safe protective circuit.Especially some electrical equipment peculiar to vessel less, due to low-voltage electrical appliance less general on ship, so when in use, user will remove the jack selecting corresponding low-voltage power supply, because general on ship, what be equipped with is DC low-voltage jack and high direct voltage jack, so user must go to select, and want correct selection normally could make electrical appliance, and can not security incident be there is, if once select mistake, will security incident be caused.
Summary of the invention
The invention provides a kind of protective circuit.
The object of the invention is to solve some circuit on existing market; structural design is unreasonable; generally mostly be and directly set input voltage; electrical appliance goes to select input voltage (general oligodactyly here, has connect the plug of power supply of coming in and going out) according to the operating voltage of setting themselves, can cause like this; if low-voltage electrical appliance mistake have selected high input voltage voltage; cause low-voltage electrical appliance to damage, even there is larger security incident in blast, society do not have at present a kind of circuit be provided with safe protective circuit.Especially some electrical equipment peculiar to vessel less, due to low-voltage electrical appliance less general on ship, so when in use, user will remove the jack selecting corresponding low-voltage power supply, because general on ship, what be equipped with is DC low-voltage jack and high direct voltage jack, so user must go to select, and want correct selection normally could make electrical appliance, and can not security incident be there is, if once select mistake, the problem of security incident will be caused.
The technical solution adopted for the present invention to solve the technical problems is: the present invention includes rectification circuit module (A), power transfer module, protective circuit module, and described power transfer module comprises the first power transfer module (DC/DC) (B) and second source modular converter (DC/DC) (D).
Described protective circuit module comprises alternating current-direct current and high-low pressure identification module (E), delay trigger circuit (F) and controllable silicon (C).
Described rectification circuit module (A) is connected with the first power transfer module (DC/DC) (B); described protective circuit module is connected with the first power transfer module (DC/DC) (B), and described the first power transfer module (DC/DC) (B) and second source modular converter (DC/DC) (D) is in parallel.
Described the first power transfer module (DC/DC) (B) turns DC low-voltage, for 100-300V transfers 24V to for high direct voltage; Described second source modular converter (DC/DC) (D) turns DC low-voltage, for 18-40V transfers 24V to for DC low-voltage; Described second source modular converter (DC/DC) (D) turns high direct voltage, for 8-40V transfers 100-300V to for DC low-voltage.
Described alternating current-direct current and high-low pressure identification module (E) comprise the first electric capacity (Cd), the first voltage stabilizing didoe (Z
1), the second voltage stabilizing didoe (Z
2), the first optocoupler (U
1), the second optocoupler (U
2), the first protective resistance (R
1), the second protective resistance (R
2) and triode (V
1), described delay trigger circuit (F) comprises the second electric capacity (Ct), the 3rd voltage stabilizing didoe (Z
3) and diode (Dt).
The power supply of described input is DC low-voltage, through alternating current-direct current identification module (E), alternating current-direct current identification module (E) identifies power supply natures, confirm safely through delay trigger circuit (F), and trigger controllable silicon (C) conducting, thus second source modular converter (DC/DC) (D) is energized, thus supply voltage needed for output services, now because input supply voltage is lower than the minimum of the first power transfer module (DC/DC) (B), thus the first power transfer module (DC/DC) (B) is not worked.
Described input power is AC power, through alternating current-direct current identification module (E), alternating current-direct current identification module (E) recognition and verification for not export, then controllable silicon (C) not conducting.Second source modular converter (DC/DC) (D) input is disconnected, do not work and ensure that safety, AC power is after the rectification of rectification circuit module (A) bridge heap simultaneously, input to the first power transfer module (DC/DC) (B), first power transfer module (DC/DC) (B) is energized, thus supply voltage needed for output services, electrical equipment is normally worked.
When described input power is alternating current, alternating current after the first electric capacity (Cd), the first resistance (Rd), optocoupler U
1, U
2in positive-negative half-cycle conducting in turn, after conducting, the upper electric energy stored of the second electric capacity (Ct) is released, and cause diode (Dt) to trigger, therefore controllable silicon (C) can not conducting because diode (Dt) cannot trigger.
Described as input voltage be high direct voltage, the input polarity of input voltage has nothing to do, and voltage is higher than Z
1, Z
2puncture voltage, then optocoupler U
1or U
2still can conducting, after conducting, the upper electric energy stored of the second electric capacity (Ct) is released, and causes diac (Dt) to trigger, and therefore controllable silicon (C) can not conducting because diode (Dt) cannot trigger; Described be direct current and lower than Z as input voltage
1, Z
2puncture voltage, then optocoupler U
1, U
2all not conductings, power supply is by the second resistance (Rt); To the second electric capacity (Ct) charging, after the second electric capacity (Ct) voltage exceedes diode (Dt) trigger voltage, trigger controllable silicon (C), make its conducting and normally work.
When power cut-off, the upper electric energy stored of described the second electric capacity (Ct) is through triode (V
1) emitter flow to base stage, by store electric energy immediate leakage to the first protective resistance (R
1) and the second protective resistance (R
2) on, the damage causing low-voltage module to prevent from causing false triggering when power line loose contact or power supply are unstable.
The invention has the beneficial effects as follows: the use safety effectively protecting low-voltage electrical appliance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is concrete structure schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in the figure; the present invention includes rectification circuit module (A), power transfer module, protective circuit module, described power transfer module comprises the first power transfer module (DC/DC) (B) and second source modular converter (DC/DC) (D).
Described protective circuit module comprises alternating current-direct current and high-low pressure identification module (E), delay trigger circuit (F) and controllable silicon (C).
Described rectification circuit module (A) is connected with the first power transfer module (DC/DC) (B); described protective circuit module is connected with the first power transfer module (DC/DC) (B), and described the first power transfer module (DC/DC) (B) and second source modular converter (DC/DC) (D) is in parallel.
Described the first power transfer module (DC/DC) (B) turns DC low-voltage, for 100-300V transfers 24V to for high direct voltage; Described second source modular converter (DC/DC) (D) turns DC low-voltage, for 18-40V transfers 24V to for DC low-voltage; Described second source modular converter (DC/DC) (D) turns high direct voltage, for 8-40V transfers 100-300V to for DC low-voltage.Concrete Power convert Digital size can adjust according to reality, i.e. the voltage of the input and output of power transfer module can adjust according to reality.If when the identical voltage of input and output, the function of power transfer module can be omitted, directly exports, time namely the voltage of the input and output of power transfer module is identical, can omit direct output.
Described alternating current-direct current and high-low pressure identification module (E) comprise the first electric capacity (Cd), the first voltage stabilizing didoe (Z
1), the second voltage stabilizing didoe (Z
2), the first optocoupler (U
1), the second optocoupler (U
2), the first protective resistance (R
1), the second protective resistance (R
2) and triode (V
1), described delay trigger circuit (F) comprises the second electric capacity (Ct), the 3rd voltage stabilizing didoe (Z
3) and diode (Dt).
The power supply of described input is DC low-voltage, through alternating current-direct current identification module (E), alternating current-direct current identification module (E) identifies power supply natures, confirm safely through delay trigger circuit (F), and trigger controllable silicon (C) conducting, thus second source modular converter (DC/DC) (D) is energized, thus supply voltage needed for output services, now because input supply voltage is lower than the minimum of the first power transfer module (DC/DC) (B), thus the first power transfer module (DC/DC) (B) is not worked.
Described input power is AC power, through alternating current-direct current identification module (E), alternating current-direct current identification module (E) recognition and verification for not export, then controllable silicon (C) not conducting.Second source modular converter (DC/DC) (D) input is disconnected, do not work and ensure that safety, AC power is after the rectification of rectification circuit module (A) bridge heap simultaneously, input to the first power transfer module (DC/DC) (B), first power transfer module (DC/DC) (B) is energized, thus supply voltage needed for output services, electrical equipment is normally worked.
When described input power is alternating current, alternating current after the first electric capacity (Cd), the first resistance (Rd), optocoupler U
1, U
2in positive-negative half-cycle conducting in turn, after conducting, the upper electric energy stored of the second electric capacity (Ct) is released, and cause diode (Dt) to trigger, therefore controllable silicon (C) can not conducting because diode (Dt) cannot trigger.
Described as input voltage be high direct voltage, the input polarity of input voltage has nothing to do, and voltage is higher than Z
1, Z
2puncture voltage, then optocoupler U
1or U
2still can conducting, after conducting, the upper electric energy stored of the second electric capacity (Ct) is released, and causes diac (Dt) to trigger, and therefore controllable silicon (C) can not conducting because diode (Dt) cannot trigger; Described be direct current and lower than Z as input voltage
1, Z
2puncture voltage, then optocoupler U
1, U
2all not conductings, power supply is by the second resistance (Rt); To the second electric capacity (Ct) charging, after the second electric capacity (Ct) voltage exceedes diode (Dt) trigger voltage, trigger controllable silicon (C), make its conducting and normally work.
When power cut-off, the upper electric energy stored of described the second electric capacity (Ct) is through triode (V
1) emitter flow to base stage, by store electric energy immediate leakage to the first protective resistance (R
1) and the second protective resistance (R
2) on, the damage causing low-voltage module to prevent from causing false triggering when power line loose contact or power supply are unstable.
Claims (10)
1. a protective circuit; it is characterized in that comprising rectification circuit module (A), power transfer module, protective circuit module, described power transfer module comprises the first power transfer module (DC/DC) (B) and second source modular converter (DC/DC) (D).
2. a kind of protective circuit according to claim 1, is characterized in that described protective circuit module comprises alternating current-direct current and high-low pressure identification module (E), delay trigger circuit (F) and controllable silicon (C).
3. a kind of protective circuit according to claim 2; it is characterized in that described rectification circuit module (A) is connected with the first power transfer module (DC/DC) (B); described protective circuit module is connected with the first power transfer module (DC/DC) (B), and described the first power transfer module (DC/DC) (B) and second source modular converter (DC/DC) (D) is in parallel.
4. a kind of protective circuit according to claim 3, is characterized in that described the first power transfer module (DC/DC) (B) turns DC low-voltage, for 100-300V transfers 24V to for high direct voltage; Described second source modular converter (DC/DC) (D) turns DC low-voltage, for 18-40V transfers 24V to for DC low-voltage; Described second source modular converter (DC/DC) (D) turns high direct voltage, for 8-40V transfers 100-300V to for DC low-voltage.
5. a kind of protective circuit according to claim 4, is characterized in that described alternating current-direct current and high-low pressure identification module (E) comprise the first electric capacity (Cd), the first voltage stabilizing didoe (Z
1), the second voltage stabilizing didoe (Z
2), the first optocoupler (U
1), the second optocoupler (U
2), the first protective resistance (R
1), the second protective resistance (R
2) and triode (V
1), described delay trigger circuit (F) comprises the second electric capacity (Ct), the 3rd voltage stabilizing didoe (Z
3) and diode (Dt).
6. the guard method of a kind of protective circuit according to claim 5, it is characterized in that the power supply of described input is DC low-voltage, through alternating current-direct current identification module (E), alternating current-direct current identification module (E) identifies power supply natures, confirm safely through delay trigger circuit (F), and trigger controllable silicon (C) conducting, thus second source modular converter (DC/DC) (D) is energized, thus supply voltage needed for output services, now because input supply voltage is lower than the minimum of the first power transfer module (DC/DC) (B), thus the first power transfer module (DC/DC) (B) is not worked.
7. the guard method of a kind of protective circuit according to claim 6, is characterized in that described input power is AC power, through alternating current-direct current identification module (E), alternating current-direct current identification module (E) recognition and verification for not export, then controllable silicon (C) not conducting; Second source modular converter (DC/DC) (D) input is disconnected, do not work and ensure that safety, AC power is after the rectification of rectification circuit module (A) bridge heap simultaneously, input to the first power transfer module (DC/DC) (B), first power transfer module (DC/DC) (B) is energized, thus supply voltage needed for output services, electrical equipment is normally worked.
8. the guard method of a kind of protective circuit according to claim 6, when it is characterized in that described input power is alternating current, alternating current after the first electric capacity (Cd), the first resistance (Rd), optocoupler U
1, U
2in positive-negative half-cycle conducting in turn, after conducting, the upper electric energy stored of the second electric capacity (Ct) is released, and cause diode (Dt) to trigger, therefore controllable silicon (C) can not conducting because diode (Dt) cannot trigger.
9. the guard method of a kind of protective circuit according to claim 6, it is characterized in that described as input voltage be high direct voltage, the input polarity of input voltage has nothing to do, and voltage is higher than Z
1, Z
2puncture voltage, then optocoupler U
1or U
2still can conducting, after conducting, the upper electric energy stored of the second electric capacity (Ct) is released, and causes diac (Dt) to trigger, and therefore controllable silicon (C) can not conducting because diode (Dt) cannot trigger; Described be direct current and lower than Z as input voltage
1, Z
2puncture voltage, then optocoupler U
1, U
2all not conductings, power supply is by the second resistance (Rt); To the second electric capacity (Ct) charging, after the second electric capacity (Ct) voltage exceedes diode (Dt) trigger voltage, trigger controllable silicon (C), make its conducting and normally work.
10. the guard method of a kind of protective circuit according to claim 6, is characterized in that when power cut-off, and the upper electric energy stored of described the second electric capacity (Ct) is through triode (V
1) emitter flow to base stage, by store electric energy immediate leakage to the first protective resistance (R
1) and the second protective resistance (R
2) on, the damage causing low-voltage module to prevent from causing false triggering when power line loose contact or power supply are unstable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510306335.0A CN104883041B (en) | 2015-06-08 | 2015-06-08 | A kind of protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510306335.0A CN104883041B (en) | 2015-06-08 | 2015-06-08 | A kind of protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104883041A true CN104883041A (en) | 2015-09-02 |
| CN104883041B CN104883041B (en) | 2018-09-14 |
Family
ID=53950417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510306335.0A Active CN104883041B (en) | 2015-06-08 | 2015-06-08 | A kind of protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104883041B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591456A (en) * | 2016-02-06 | 2016-05-18 | 广东顺德锐铂汇电子科技有限公司 | Alternating-current and direct-current high-low voltage power supply input and output intelligent detection output circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0676854A2 (en) * | 1994-04-08 | 1995-10-11 | Vlt Corporation | Efficient power conversion |
| CN101483948A (en) * | 2008-01-08 | 2009-07-15 | 张晓云 | Intelligent semi-conductor lighting lamp |
| CN201549920U (en) * | 2009-09-10 | 2010-08-11 | 中国人民解放军海军702厂 | Intelligent charger with alternating current and direct current collinear input |
| CN101867208A (en) * | 2010-06-07 | 2010-10-20 | 杭州市电力局 | a charging pile |
| CN204376508U (en) * | 2014-12-31 | 2015-06-03 | 厦门台和电子有限公司 | A kind of quick-charging circuit |
| CN204835907U (en) * | 2015-06-08 | 2015-12-02 | 嘉兴星网通信技术有限公司 | Protective circuit |
-
2015
- 2015-06-08 CN CN201510306335.0A patent/CN104883041B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0676854A2 (en) * | 1994-04-08 | 1995-10-11 | Vlt Corporation | Efficient power conversion |
| CN101483948A (en) * | 2008-01-08 | 2009-07-15 | 张晓云 | Intelligent semi-conductor lighting lamp |
| CN201549920U (en) * | 2009-09-10 | 2010-08-11 | 中国人民解放军海军702厂 | Intelligent charger with alternating current and direct current collinear input |
| CN101867208A (en) * | 2010-06-07 | 2010-10-20 | 杭州市电力局 | a charging pile |
| CN204376508U (en) * | 2014-12-31 | 2015-06-03 | 厦门台和电子有限公司 | A kind of quick-charging circuit |
| CN204835907U (en) * | 2015-06-08 | 2015-12-02 | 嘉兴星网通信技术有限公司 | Protective circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105591456A (en) * | 2016-02-06 | 2016-05-18 | 广东顺德锐铂汇电子科技有限公司 | Alternating-current and direct-current high-low voltage power supply input and output intelligent detection output circuit |
| CN105591456B (en) * | 2016-02-06 | 2019-09-24 | 广东顺德锐铂汇电子科技有限公司 | Alternating-direct current high-low voltage power input exports intelligent measurement output circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104883041B (en) | 2018-09-14 |
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