CN2148424Y - Compound type overvoltage protecting device - Google Patents
Compound type overvoltage protecting device Download PDFInfo
- Publication number
- CN2148424Y CN2148424Y CN 93206520 CN93206520U CN2148424Y CN 2148424 Y CN2148424 Y CN 2148424Y CN 93206520 CN93206520 CN 93206520 CN 93206520 U CN93206520 U CN 93206520U CN 2148424 Y CN2148424 Y CN 2148424Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- triode thyristor
- bidirectional triode
- protecting device
- piezo
- 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
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses an overvoltage protection component, particularly a compound type overvoltage protecting device which is fit for the overvoltage protection of AC/DC current power consumption equipment in the fields of electrician and electron. The utility model is formed by assembling a bidirectional thyristor, a varistor and a diode. The protecting device can be switched on when the voltage of the power supply reaches the protection voltage value of the protecting device, the safety wire of the power supply is fused, and electrical appliances are protected.
Description
The utility model has related to security personnel's device of electrician, electronic applications, specifically a kind of compound overvoltage protector.Be applicable to the overvoltage protection of household electrical appliance, electronic equipment.
Along with popularizing of power consumption equipment, overvoltage protection more and more causes people's attention, and protective circuit is set in power circuit, and the way of protection device generally is used.Number of patent application 93200381.8 once disclosed a kind of compound overvoltage protector.This protector is formed an independent protection element with a bidirectional triode thyristor and a resistance, plays overvoltage and overcurrent protection in circuit.Device is reusable, and is practical.But, the over-voltage protection element bidirectional triode thyristor by and conducting be that electric current by the resistance of flowing through decides, in resistance branch, exist electric current all the time, influence the useful life of bidirectional triode thyristor, and cause misoperation easily, unfavorable to protective circuit.
The purpose of this utility model is to release a kind of can the repeated use continuously in circuit, do not produce misoperation, does not produce the overvoltage protector of power consumption under normal power supply voltage, to satisfy the needs of overvoltage protection.
Design of the present utility model is to utilize the voltage-sensitive characteristic of piezo-resistance and the switching characteristic of bidirectional triode thyristor to realize overvoltage protection.
Task of the present utility model is by a bidirectional triode thyristor and a piezo-resistance and a diode are fitted together, and cooperate electric current to insure to finish.The conducting of bidirectional triode thyristor with by by gate trigger current control, just can change ending and conducting of bidirectional triode thyristor as long as change gate trigger current, be used for satisfying the needs of protective circuit.The utility model is with a termination gate pole of piezo-resistance, one end of the other end and diode joins, another termination anode of diode, utilize the variation of supply voltage to change ending and conducting of piezo-resistance, utilize the trigger current of gate pole that ending of bidirectional triode thyristor connected with conducting and mains voltage variations.Because the nonlinear characteristic of piezo-resistance; under normal working voltage, be in cut-off state; gate pole does not have electric current to pass through, during the magnitude of voltage that has only voltage to be raised to need protection, and the piezo-resistance conducting; trigger current passes through gate pole; controllable silicon is switched on, short circuit, the insurance of short circuit current blowout current; cut off the electricity supply, protected electrical appliance.Diode in the utility model is provided with for the misoperation that the pulse in the power supply and surge current cause in order to prevent the high sensitivity bidirectional triode thyristor.
The parameter that the utility model only need change piezo-resistance and bidirectional triode thyristor just can be developed into have different protection voltages, the AC and DC series of products of different through-current capacity.
The utility model can directly be welded on bidirectional triode thyristor, piezo-resistance, diode in the circuit of electrical appliance and use, also can be the chip of bidirectional triode thyristor and diode, and piezo-resistance is packaged into an over-voltage protection element with insulating material and uses.
Characteristics of the present utility model are that the overvoltage protector can be in the medium-term and long-term work of circuit, and are anti-interference, can reuse.
Embodiment of the present utility model is provided by following accompanying drawing:
Fig. 1 is the use principle figure of the utility model in circuit
Fig. 2 is a graphical diagram of the present utility model
Fig. 3 is an outline drawing of the present utility model.
As figure, (1) is the electric current protective tube, and (2) are piezo-resistance, and (3) are diode, and (4) are bidirectional triode thyristor.During use, electric current protective tube (1) is serially connected in the power circuit, one of piezo-resistance (2) terminates on the gate pole (G) of controllable silicon (4), another terminating diode (3).The other end of diode (3) is received on the anode (A2) of bidirectional triode thyristor.Two anodes of bidirectional triode thyristor (4) are attempted by the two ends with electric loading.When supply voltage just often, piezo-resistance (2) is ended, and does not have trigger current.When supply voltage raises for some reason, when reaching the voltage protection value of overvoltage protector, piezo-resistance (2) conducting, the bidirectional triode thyristor conducting that is triggered forms short circuit, and short circuit current blowout current protective tube (1) is cut off the electricity supply, and has protected electrical appliance.
Claims (3)
1, the overvoltage protector that uses of a kind of electrician, electronic applications, it is characterized in that this overvoltage protector is made up of a piezo-resistance (2) and a bidirectional triode thyristor (4), one of piezo-resistance terminates on the gate pole of bidirectional triode thyristor, and the other end is connected on the anode of bidirectional triode thyristor (4).
2, overvoltage protector as claimed in claim 1.It is characterized in that being connected to a diode (3) between the anode of end of piezo-resistance (2) and bidirectional triode thyristor (4).
3, as claim 1,2, described overvoltage protector.It is characterized in that piezo-resistance (2) and diode (3), bidirectional triode thyristor (4) can fit together with insulating material and be encapsulated as an element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93206520 CN2148424Y (en) | 1993-03-22 | 1993-03-22 | Compound type overvoltage protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93206520 CN2148424Y (en) | 1993-03-22 | 1993-03-22 | Compound type overvoltage protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2148424Y true CN2148424Y (en) | 1993-12-01 |
Family
ID=33789505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93206520 Expired - Fee Related CN2148424Y (en) | 1993-03-22 | 1993-03-22 | Compound type overvoltage protecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2148424Y (en) |
-
1993
- 1993-03-22 CN CN 93206520 patent/CN2148424Y/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101237137A (en) | Over voltage and under-voltage device | |
| CN205583646U (en) | Earth leakage protection wall switch | |
| CN2148424Y (en) | Compound type overvoltage protecting device | |
| CN2174800Y (en) | Domestic voltage loop overvoltage protector | |
| CN2520063Y (en) | Thunder protector for electric net | |
| CN208903924U (en) | Relay contact protection and codan | |
| CN211266446U (en) | Circuit breaker protection device | |
| CN2376685Y (en) | Power source protective module | |
| CN2146789Y (en) | Multi-functional safety socket | |
| CN2187852Y (en) | Composite overvoltage safe device | |
| CN206962425U (en) | residual current action breaker device | |
| CN2149694Y (en) | Multi-function safety plug | |
| CN206412761U (en) | A kind of surge protecting circuit and surge protector | |
| CN2143839Y (en) | Composite over voltage sefeguard | |
| CN210608526U (en) | JBNY type low-voltage surge protection device | |
| CN2178956Y (en) | Safety device for electrical equipment of household | |
| CN218602862U (en) | Power conversion socket without touch sensing | |
| CN214412265U (en) | Leakage protection circuit with overvoltage protection | |
| CN211790740U (en) | Protective circuit | |
| CN217656564U (en) | Voltage-stabilized power supply circuit based on high-voltage MOS and voltage-stabilizing tube | |
| CN219477592U (en) | Control circuit, control device and electric equipment based on band-type brake | |
| CN216699495U (en) | Electric power protection circuit | |
| CN221530966U (en) | Enhanced overvoltage and undervoltage judgment protection device with lightning protection function | |
| CN215498234U (en) | Single-phase under-voltage protection ware circuit of crossing of improvement type | |
| CN112436483B (en) | Leakage protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |