CN2230479Y - Contactless electricity limitor - Google Patents
Contactless electricity limitor Download PDFInfo
- Publication number
- CN2230479Y CN2230479Y CN 93232045 CN93232045U CN2230479Y CN 2230479 Y CN2230479 Y CN 2230479Y CN 93232045 CN93232045 CN 93232045 CN 93232045 U CN93232045 U CN 93232045U CN 2230479 Y CN2230479 Y CN 2230479Y
- Authority
- CN
- China
- Prior art keywords
- utility
- circuit
- model
- contactless
- pin
- 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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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a no-contact electricity limiter, belonging to the emergency protector of a circuit. The power supply part of the line of the utility model adopts a capacitor instead of a transformer, a fire wire is switched in the circuit to serve as a common ground wire, after an IC integrated comparison part, a triggering part, a push part, and an R3 are connected with an ED in series, a positive pole is connected with an IC3 foot, a negative pole is connected with a thyristor control pole, and a no-contact control is formed. The utility model has the advantages of simple structure, small volume, low cost and energy saving.
Description
The utility model relates to a kind of circuit emergency protective device, the electricity-limiter of definite a kind of quantitative power supply of saying so.
The known technology close with the utility model is the quantitative supplying power device that Qingdao scientific instrument factory produces, this charger power unit adopts the transformer step-down, core component is four voltage comparators, this comparator output terminal amplifies the back by triode and drives relay, contact control by relay exchanges the electric shock device again, exchange the contact control output of electric shock device, form contactor control.Weak point is that the contact is many, complex structure, volume is big, cost is high.
The purpose of this utility model provides a kind of contactless, and is simple in structure, the circuit emergency protective device that volume is little, cheap energy-conservation.
The utility model is achieved in that electricity-limiter forms power unit C by power supply, sampling, time-delay, comparison, triggering, promotion, output seven parts
1With R
1After the series connection, a termination zero line, another termination rectifier diode D
1, D
2Make shared ground wire behind the live wire place in circuit.D
2Use voltage stabilizing didoe, its plus earth.D
1Negative pole meets filter capacitor C
2, connect 4,8 pin of time-base circuit IC simultaneously.IC is a core component, integrated comparison, triggering, three parts of promotion.2,6 pin meet D
3, C
3, R
2, 1 pin ground connection, 5 pin pass through C
4Ground connection, R
3Connect with ED, positive pole connects the IC3 pin, and negative pole connects the controllable silicon BCR control utmost point and forms contactless control.
During work, coil T gives capacitor C by diode when detecting excessive electric current on the transmission line
3Be charged to 2/3VDD, the upset of IC circuit, the no-output electric current, controllable silicon turn-offs.Have no progeny in the pass, transmission line does not have electric current to flow through, and coil T detects less than overcurrent, and electric capacity slowly discharges by resistance, and voltage descends.When the voltage on the capacitor drops to 1/3VDD, the upset of IC circuit.Output current excites the controllable silicon conducting.
Accompanying drawing 1 is a block diagram of the present utility model.
Accompanying drawing 2 is a line map of the present utility model
As shown in Figure 1: 1 be power supply, 2 for sampling, 3 for time-delay, 4 for relatively, 5 for trigger, 6 for promoting, 7 being output
Power unit C
1With R
1After the series connection, a termination zero line, another termination rectifier diode D
1, D
2Make shared ground wire behind the live wire place in circuit.D
2With its plus earth of voltage stabilizing didoe.D
1Negative pole meets filter capacitor C
2, the output direct-flow positive voltage is given 4, the 8 pin power supply of time-base circuit IC.The sampling part live wire passes the iron core of sample coil T when entering circuit.T and semifixed resistor W
1, W
2After the parallel connection, an end ground connection.W
1, W
2Two sliding ends connect the two-end-point of toggle switch K respectively, and the central point of K meets rectifier diode D
3Positive pole.D
3Negative pole connect the time-delay partial C
3And R
2And 2,6 pin of IC.The integrated comparison of IC, triggering, three parts of promotion, the 1 pin ground connection of IC; 5 pin pass through C
4Ground connection; 3 pin output passing through R
3ED connects the control utmost point of output controllable silicon BCR.SCR control output forms contactless control.C
5With R
4After the series connection and at the BCR two ends, an also available piezo-resistance, the unlikely puncture of protection controllable silicon.
Claims (1)
- A kind of contactless electricity-limiter by power supply, sampling, is delayed time, is compared, triggers, promotes, exports seven parts composition, it is characterized in that: the power unit capacitor C 1With resistance R 1After the series connection, a termination zero line, another termination rectifier diode D 1, D 2, the live wire place in circuit is made shared ground wire, the integrated comparison of IC, triggering, three parts of promotion, resistance R 3After light-emitting diode ED connected, positive pole connect the IC3 pin, and negative pole connects the SCR control utmost point, constituted contactless control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93232045 CN2230479Y (en) | 1993-10-09 | 1993-10-09 | Contactless electricity limitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93232045 CN2230479Y (en) | 1993-10-09 | 1993-10-09 | Contactless electricity limitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2230479Y true CN2230479Y (en) | 1996-07-03 |
Family
ID=33808357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93232045 Expired - Fee Related CN2230479Y (en) | 1993-10-09 | 1993-10-09 | Contactless electricity limitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2230479Y (en) |
-
1993
- 1993-10-09 CN CN 93232045 patent/CN2230479Y/en not_active Expired - Fee Related
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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 |