CN100435442C - Overcurrent and overvoltage protector - Google Patents
Overcurrent and overvoltage protector Download PDFInfo
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- CN100435442C CN100435442C CNB2006100327818A CN200610032781A CN100435442C CN 100435442 C CN100435442 C CN 100435442C CN B2006100327818 A CNB2006100327818 A CN B2006100327818A CN 200610032781 A CN200610032781 A CN 200610032781A CN 100435442 C CN100435442 C CN 100435442C
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Abstract
The present invention relates to an over-current and over-voltage protector, which comprises a voltage detecting module, a current/voltage converting module, and a voltage threshold distinguishing and processing module, a bi-stable latching module and a relay pushing module which are respectively accessed into a power supply circuit module, wherein one end of the voltage detecting module is connected to a power supply electric network, and the other end is connected with the voltage threshold distinguishing and processing module; the current/voltage converting module is connected with the voltage threshold distinguishing and processing module; the bi-stable latching module is respectively connected with the voltage threshold distinguishing and processing module and the relay pushing module; the power supply circuit module is connected with a digital RF circuit module, and the digital RF circuit module is connected with the bi-stable latching module. The voltage threshold distinguishing and processing module carries out threshold distinguishing, time delay and amplification to signals output from the current/voltage converting module and the voltage detecting module; the digital RF circuit module remotely controls a replaced load circuit so as to avoid direct manual operation. The present invention has the advantages of convenient use, safety and reliability.
Description
Technical field
The present invention relates to the circuit protection device field, particularly relate to the overcurrent and overvoltage protector that a kind of remote control lamp, appliance switch are used.
Background technology
Circuit protection device of the prior art if the loop only is provided with holding fuse, when in a single day the overcurrent fuse burns out, must be changed again by hand, uses very inconveniently, and material also causes very big waste.As air switch or leakage switch are set in circuit, they generally are to utilize solenoid or bimetal leaf to make electric energy be converted into mechanical energy to make the contactor dropout and circuit is carried out overcurrent protection, though the more independent fuse protection of over-flow protecting effect increases, but in the protective device of this structure, the shortcoming of solenoid is that time of delay is too short and uncontrollable, when capacitive load is big, when loop current does not surpass nominal load, solenoid may produce misoperation dropout phenomenon, the circuit mistake is disconnected, influence the operate as normal of load; Bimetal leaf then is to make the sheet metal bending by the electric current heating functioin; to reach the purpose of open circuit; the time of delay that its circuit disconnects is by the material decision of sheet metal; because the physical features factor of material itself; cross from circuit and to flow to sheet metal heating bending and make open circuit must pass through certain hour; so adopt the circuit of sheet metal as overflow protecting element; its time of delay is oversize; be easy to burn out switch and loop; may cause unnecessary fire incident, circuit is not had real-time overcurrent protection.Simultaneously, circuit protection device of the prior art, even circuit also is provided with over-pressure safety device, but its device is too short time of delay, and can not adjust, and is difficult to accurate control, can produce misoperation dropout phenomenon equally, influences the operate as normal of load.In addition, after overcurrent protective device is threaded off, can only lean on by hand circuit is reclosed, can't realize Long-distance Control, in the occasion of high voltage, big electric current, have certain danger.
Summary of the invention
The invention reside in and overcome the deficiencies in the prior art, provide a kind of esy to use, safe and reliable, can be by radio frequency to realize the overcurrent and overvoltage protector of remote control lamp, appliance switch.
Goal of the invention of the present invention is achieved in that a kind of overcurrent and overvoltage protector, comprises voltage detection module, current/voltage modular converter and inserts the threshold voltage discriminating processing module and the relay push module of power supply circuits module respectively,
Wherein threshold voltage discriminating processing module is by high-frequency filter circuit module, threshold voltage Discrimination module, delay circuit module and signal amplification module connect to form in turn,One end of voltage detection module is connected on the power supply grid,
The voltage of the delay circuit module in the other end and the threshold voltage discriminating processing module Input is connected, the high-frequency filter circuit in current/voltage modular converter and the threshold voltage discriminating processing module The input of module connects,It is characterized in that: described overcurrent and overvoltage protector also comprises digital RF circuit module and the bistable state latch module that inserts the power supply circuits module respectively, the bistable state latch module respectively with the output of digital RF circuit module,
The output of the signal amplification module of threshold voltage discriminating processing moduleAnd the input of relay push module connects.
Described current/voltage modular converter comprise the inspection streamline circle that is located on the load circuit and with
Threshold voltage is differentiated High-frequency filter circuit module in the processing module connectsThe transformation coil.
Described high-frequency filter circuit module is the integrating circuit that electric capacity and a resistance connect to form, and its input is connected with the current/voltage modular converter, and its output is connected with the threshold voltage discrimination module.
Described delay circuit module is the integrating circuit that electric capacity and a resistance connect to form, and its input is connected with the threshold voltage discrimination module, and its output is connected with the signal amplification module.
Described voltage detection module is composed in series by piezo-resistance and protective resistance.
Described relay push module is composed in series by triode and solenoid.
Described digital RF circuit module comprises digital RF receiver module and digital decoding module.
Overcurrent and overvoltage protector of the present invention compared with prior art has the following advantage that has:
(1) current/voltage modular converter and voltage detection module can convert the electric current of load, voltage signal to threshold voltage discriminating processing module required ground voltage signal exactly, in the delay circuit module of threshold voltage discriminating processing module, dropout time of delay in the time of can coming the adjusting device overcurrent-overvoltage by the parameter of respective element in the apolegamy delay circuit module, effectively prevent misoperation dropout phenomenon, has control accurately, the advantage that can set arbitrarily time of delay.
(2) load circuit is threaded off behind the open circuit because of overcurrent-overvoltage, again reset and connect the straighforward operation that circuit only need pass through the digital RF module, realize to control light fixture, appliance switch, need not manual directly reset operation in RF remote-controlled mode, have easy to operate, safe and reliable characteristics.
(3) single unit system is made up of modularized circuit, when breaking down, can detect replacing at particular module, and easy to operate, maintenance cost is few.
Description of drawings
Fig. 1 is a functional-block diagram of the present invention.
Fig. 2 is the schematic diagram of the embodiment of the invention 1.
Fig. 3 is the schematic diagram of the embodiment of the invention 2.
Fig. 4 is the schematic diagram of the embodiment of the invention 3.
Fig. 5 is the schematic diagram of the embodiment of the invention 4.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
According to shown in Figure 1, the voltage detection module 2 that overcurrent and overvoltage protector of the present invention comprises power supply circuits module 1, be connected in series by piezo-resistance 12 and protective resistance 13, current/voltage modular converter 3, threshold voltage discriminating processing module 4, digital RF circuit module 5, bistable state latch module 8 and the relay push module 9 formed by digital RF receiver module 6 and digital decoding module 7.In the threshold voltage discriminating processing module 4, the delay circuit module 16 and the signal amplification module 17 that comprise the high-frequency filter circuit module 14 that constitutes with integrating circuit, threshold voltage discrimination module 15, constitute with integrating circuit, wherein threshold voltage discrimination module 15 and signal amplification module 17 can be the enforcement that matches of triode, operational amplifier, inverter or voltage comparator and related resistors respectively, 16 pairs of voltage signals of delay circuit module play time-lag action, by the dropout time of delay of the parameter of respective element in apolegamy module circuit can the adjusting device overcurrent-overvoltage time.Power supply circuits module 1 is connected with threshold voltage discriminating processing module 4, bistable state latch module 8 and relay push module 9 respectively.Current/voltage modular converter 3 is made up of the inspection streamline circle 10 and the transformation coil 11 that are located in the load, and the output of this module is connected on the threshold voltage discriminating processing module 4.One end of voltage detection module 2 is connected on the power supply grid, and the other end is connected with threshold voltage discriminating processing module 4.Device can be by joining the quick resistance 12 of level pressure the magnitude of voltage parameter can setting device threshold voltage.Bistable state latch module 8 is connected with the input of digital RF circuit module 5, threshold voltage discriminating processing module 4 outputs and relay push module 9 respectively.
Among the embodiment shown in the accompanying drawing 2; threshold voltage discrimination module 15 and signal amplification module 17 respectively with triode as execution mode; when the load overcurrent; the mutual inductance effect of current/voltage modular converter 3 by inspection streamline circle 10 and transformation coil 11 is converted into the required voltage signal of threshold voltage discriminating processing module 4 to load current signal; this voltage signal is sent to after high-frequency filter circuit module 14 in the threshold voltage discriminating processing module 4 filters; when if signal surpasses the threshold voltage that triode sets in the threshold voltage discrimination module 15; then exporting the correspondent voltage signal is sent to delay circuit module 16 and carries out delay process; the adjusted voltage signal of delaying time is admitted to signal amplification module 17; signal after the amplification promotes 8 upsets of bistable state latch module and makes 9 actions of relay push module; load circuit K switch open circuit; load circuit disconnects, and has protected K switch and loop.Wait for that digital RF circuit module 5 sends signal, deliver to bistable state latch module 8 and its upset is resetted make 9 actions of relay push module that contactor K closes and powers to the load again, recovers normally to use.When the current supply circuit overvoltage; when the piezo-resistance 12 detection current supply circuit voltages of voltage detection module 2 are preset rated voltage above detection module; then piezo-resistance 12 conductings in the voltage detection module 2; export the delay circuit module 16 that a superpressure signal directly delivered in the threshold voltage discriminating processing module 4 and adjust back entering signal amplification modules 17; signal after triode amplifies promotes 8 upsets of bistable state latch module and makes 9 actions of relay push module; load circuit K switch open circuit; no longer power to the load, protected K switch and load.Wait for that digital RF circuit module 5 sends signal, deliver to bistable state latch module 8,8 upsets of bistable state latch module reset and make 9 actions of relay push module, and contactor K closes and powers to the load again, recovers normally to use.
Among the embodiment shown in the accompanying drawing 3; threshold voltage discrimination module 15 and signal amplification module 17 respectively with operational amplifier as execution mode; when overcurrent condition appears in load; the operational amplifier that the voltage signal of current/voltage modular converter 3 outputs enters in the threshold voltage discrimination module 15 after filtering by high-frequency filter circuit module 14 carries out the threshold voltage judgement; the voltage signal that surpasses pre-set threshold value is sent to delay circuit module 16 and carries out delay process; operational amplifier in the signal entering signal amplification module 17 after the delay process is carried out the signal processing and amplifying; signal after the processing and amplifying promotes 8 upsets of bistable state latch module and makes 9 actions of relay push module; load circuit is disconnected, and K switch and loop are protected.When digital RF circuit module 5 sends signal, to deliver to bistable state latch module 8 and its upset is resetted make 9 actions of relay push module, K switch is closed, and circuit recloses, and load restoration normally uses.When overpressure situation appears in current supply circuit; the superpressure signal of voltage detection module 2 outputs is directly delivered to delay circuit module 16 and is carried out delay process; signal after the delay process is carried out the signal processing and amplifying through the operational amplifier in the signal amplification module 17 equally; and then promotion bistable state latch module 8 is overturn and relay push module 9 is moved; load circuit is disconnected, and K switch and load are protected.When digital RF circuit module 5 sends signal, by the corresponding actions of bistable state latch module 8 and relay push module 9, K switch is closed, and circuit recloses, and load restoration normally uses.
Among the embodiment shown in the accompanying drawing 4; threshold voltage discrimination module 15 and signal amplification module 17 respectively with inverter as execution mode; the circuit of load overcurrent; the inverter that enters in the threshold voltage discrimination module 15 after the voltage signal that impels current/voltage modular converter 3 to export filters by high-frequency filter circuit module 14 carries out the threshold voltage judgement; the back is by delay circuit module 16 delay process; make the signal processing and amplifying by the inverter in the signal amplification module 17 again; and then promotion bistable state latch module 8 and 9 actions of relay push module; load circuit is disconnected, reach the purpose in protection switch K and loop.The current supply circuit that overvoltage occurs; then the superpressure signal of voltage detection module 2 output is directly delivered to delay circuit module 16 and is carried out delay process; signal after the delay process is made the signal processing and amplifying through the inverter in the signal amplification module 17 equally; promote bistable state latch module 8 and 9 actions of relay push module; load circuit is disconnected, reach the purpose of protection protection switch K and load.After load circuit opens circuit because of overcurrent-overvoltage, can send signal by digital RF circuit module 5, power to the load again contactor K is resetted with embodiment 1 same manner of execution, recover operate as normal.
Among the embodiment shown in the accompanying drawing 5; threshold voltage discrimination module 15 and signal amplification module 17 respectively with voltage comparator as execution mode; when load circuit electric current overrate; the voltage comparator that enters after the voltage signal of current/voltage modular converter 3 outputs filters by high-frequency filter circuit module 14 in the threshold voltage discrimination module 15 carries out threshold voltage judgement back by delay circuit module 16 delay process; make the signal processing and amplifying by the voltage comparator in the signal amplification module 17 again; make bistable state latch module 8 and 9 actions of relay push module; and then the load circuit disconnection, so that K switch and loop are protected.When power supply circuits voltage overrate; the superpressure signal of voltage detection module 2 outputs is directly delivered to delay circuit module 16 and is carried out delay process; signal after the delay process passes through signal amplification module 17 voltage comparator processing and amplifying equally; promote bistable state latch module 8 and 9 actions of relay push module; load circuit is disconnected, so that K switch and load are protected.If load circuit is because of after overcurrent-overvoltage opens circuit, can send signal by digital RF circuit module 5 and realize that contactor K resets and power to the load again, recover normally to use.
Claims (7)
1. overcurrent and overvoltage protector; comprise voltage detection module (2); current/voltage modular converter (3) and insert the threshold voltage discriminating processing module (4) and the relay push module (9) of power supply circuits module (1) respectively; wherein; threshold voltage discriminating processing module (4) is by high-frequency filter circuit module (14); threshold voltage discrimination module (15); delay circuit module (16) and signal amplification module (17) connect to form in turn; one end of voltage detection module (2) is connected on the power supply grid; the voltage input end of the delay circuit module (16) in the other end and the threshold voltage discriminating processing module (4) is connected; the input of the high-frequency filter circuit module (14) in current/voltage modular converter (3) and the threshold voltage discriminating processing module (4) is connected; it is characterized in that: described overcurrent and overvoltage protector also comprises digital RF circuit module (5) and the bistable state latch module (8) that inserts power supply circuits module (1) respectively, bistable state latch module (8) respectively with the output of digital RF circuit module (5); the output of the signal amplification module (17) of threshold voltage discriminating processing module (4) and the input of relay push module (9) connect.
2. according to the described overcurrent and overvoltage protector of claim 1, it is characterized in that: described current/voltage modular converter (3) comprises the inspection streamline circle (10) that is located on the load circuit and the transformation coil (11) that is connected with high-frequency filter circuit module (14) in the threshold voltage discriminating processing module (4).
3. according to the described overcurrent and overvoltage protector of claim 1; it is characterized in that: described high-frequency filter circuit module (14) is the integrating circuit that resistance (18) and an electric capacity (19) connect to form; its input is connected with current/voltage modular converter (3), and its output is connected with threshold voltage discrimination module (15).
4. according to the described overcurrent and overvoltage protector of claim 1; it is characterized in that: described delay circuit module (16) is the integrating circuit that resistance (20) and an electric capacity (21) connect to form; its input is connected with threshold voltage discrimination module (15), and its output is connected with signal amplification module (17).
5. according to the described overcurrent and overvoltage protector of claim 1, it is characterized in that: described voltage detection module (2) is composed in series by piezo-resistance (12) and protective resistance (13).
6. according to the described overcurrent and overvoltage protector of claim 1, it is characterized in that: described relay push module (9) is composed in series by solenoid (22) and triode (23).
7. according to the described overcurrent and overvoltage protector of claim 1, it is characterized in that: described digital RF circuit module (5) comprises digital RF receiver module (6) and digital decoding module (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100327818A CN100435442C (en) | 2006-01-10 | 2006-01-10 | Overcurrent and overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100327818A CN100435442C (en) | 2006-01-10 | 2006-01-10 | Overcurrent and overvoltage protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1819384A CN1819384A (en) | 2006-08-16 |
| CN100435442C true CN100435442C (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100327818A Expired - Fee Related CN100435442C (en) | 2006-01-10 | 2006-01-10 | Overcurrent and overvoltage protector |
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| Country | Link |
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| CN (1) | CN100435442C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867177A (en) * | 2010-07-02 | 2010-10-20 | 深圳市四方电气技术有限公司 | Over-voltage and over-current hardware protection circuit and DC power supply circuit |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036196B (en) | 2012-12-03 | 2015-11-25 | 华为技术有限公司 | Over-pressure safety device and method |
| CN106208198B (en) * | 2016-07-22 | 2018-10-09 | 北京空间飞行器总体设计部 | A kind of battery discharge regulator output overvoltage protection circuit |
| CN106209041B (en) * | 2016-09-14 | 2023-05-30 | 四川易冲科技有限公司 | Overcurrent protection circuit |
| CN111442469A (en) * | 2020-03-31 | 2020-07-24 | 美的集团股份有限公司 | Overvoltage protection method, indoor main control board, air conditioner and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986002786A1 (en) * | 1984-10-24 | 1986-05-09 | Om Ahuja | Auto-reset circuit breaker |
| CN2034744U (en) * | 1987-07-01 | 1989-03-22 | 张忠仁 | Automatic resetting multifunctional electricity-saving protector |
| CN2061342U (en) * | 1989-11-23 | 1990-08-29 | 万健 | Fully automatic protective current limiter |
| CN2181112Y (en) * | 1994-01-15 | 1994-10-26 | 葛振华 | Remote-control multifunctional double-protection leakage protector |
| CN2729983Y (en) * | 2003-09-03 | 2005-09-28 | 贺一平 | Remote control electrical shock circuit breaker |
-
2006
- 2006-01-10 CN CNB2006100327818A patent/CN100435442C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986002786A1 (en) * | 1984-10-24 | 1986-05-09 | Om Ahuja | Auto-reset circuit breaker |
| CN2034744U (en) * | 1987-07-01 | 1989-03-22 | 张忠仁 | Automatic resetting multifunctional electricity-saving protector |
| CN2061342U (en) * | 1989-11-23 | 1990-08-29 | 万健 | Fully automatic protective current limiter |
| CN2181112Y (en) * | 1994-01-15 | 1994-10-26 | 葛振华 | Remote-control multifunctional double-protection leakage protector |
| CN2729983Y (en) * | 2003-09-03 | 2005-09-28 | 贺一平 | Remote control electrical shock circuit breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867177A (en) * | 2010-07-02 | 2010-10-20 | 深圳市四方电气技术有限公司 | Over-voltage and over-current hardware protection circuit and DC power supply circuit |
| CN101867177B (en) * | 2010-07-02 | 2013-03-27 | 深圳市四方电气技术有限公司 | Over-voltage and over-current hardware protection circuit and DC power supply circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1819384A (en) | 2006-08-16 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Foshan city Shunde District Xinhua Electrical Appliance Co. Ltd. Assignor: Lu Dechang Contract record no.: 2010440001027 Denomination of invention: Overcurrent and overvoltage protector Granted publication date: 20081119 License type: Exclusive License Open date: 20060816 Record date: 20100727 |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Foshan city Shunde District Xinhua Electrical Appliance Co. Ltd. Assignor: Lu Dechang Contract record no.: 2010440001027 Date of cancellation: 20120117 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20060816 Assignee: XINHUA ELECTRICAL CO., LTD. OF GUANGDONG Assignor: Lu Dechang Contract record no.: 2012440000408 Denomination of invention: Overcurrent and overvoltage protector Granted publication date: 20081119 License type: Exclusive License Record date: 20120716 |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081119 Termination date: 20180110 |