CN202886556U - Isolation type relay contact actuation detecting circuit - Google Patents
Isolation type relay contact actuation detecting circuit Download PDFInfo
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- CN202886556U CN202886556U CN 201220080658 CN201220080658U CN202886556U CN 202886556 U CN202886556 U CN 202886556U CN 201220080658 CN201220080658 CN 201220080658 CN 201220080658 U CN201220080658 U CN 201220080658U CN 202886556 U CN202886556 U CN 202886556U
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- control circuit
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Abstract
The utility model discloses an isolation type relay contact actuation detecting circuit, which comprises a relay and a system main control circuit. A control circuit integrated module is connected between the relay and the system main control circuit. One side of the control circuit integrated module is provided with a logic control circuit while the other side is provided with a current sampling circuit. One end of the logic control circuit is communicated with the system main control circuit while the other end is connected with a drive triode. One end of the current sampling circuit is connected with the logic control circuit while the other end is connected with the relay. A sampling resistor is arranged between the current sampling circuit and the relay. One side of the drive triode is connected with a freewheeling diode. A time point of contact actuation is extracted from the current of the relay coil. In this way, isolation type relay contact actuation detection of a home appliance is achieved. The service lifetime of the relay is prolonged. Meanwhile, the using efficiency is also improved. The technical scheme provided by the utility model is an innovative one with a novel design and is easy to popularize and use.
Description
Technical field
The utility model relates to the testing circuit of household electrical appliance, particularly relates to a kind of complete isolated relay contact motion detector circuit.
Background technology
At present, the air-conditioning that often uses in our life, refrigerator, electric cooker, water heater, soy bean milk making machine, most of Control that adopts in the control circuit of the high-power electrical appliances of a series of temperature controls such as temperature control electric flatiron, sparking in the relay switch process then is the fatal killer of relay contact, affect our normal use, greatly reduced relay life, and brought simultaneously the EMI interference problem, thereby produced the circuit of various relay protections, disclose a kind of Overzero switch controlling circuit such as Chinese patent 200620039011.1, comprised relay, relay drive circuit, power circuit, control circuit, zero crossing sample circuit and controllable silicon; Described power circuit is used to relay and control circuit power supply.The zero crossing sample circuit is for detection of the zero crossing of alternating voltage, and the zero crossing signal is passed to control circuit; The conducting that control circuit is used for controlling the silicon controlled conducting and being used for the pilot relay driving circuit makes relay power; Be connected in series with load after first and second anode of controllable silicon and the relay contact parallel connection and be connected in the alternating circuit.This circuit is in conjunction with controllable silicon and relay advantage, realized zero breaking control with the controllable silicon auxiliary relay, avoided electric arc that relay occurs in make and break process to the damage of relay, reduced simultaneously the surge current that produces in the relay interrupting process, solved the EMC problem, and when normal operation, only use relay, and avoided the silicon controlled power attenuation, solved the silicon controlled heating problem.But, the fully isolation that does not also solve control circuit and high-pressure side, so some household electrical appliance commonly used still are difficult to bear, the security performance of use is not high, practicality is not strong, so be difficult for promoting the use of.
In sum, for the defective of prior art, need especially a kind of complete isolated relay contact motion detector circuit, to solve the deficiencies in the prior art.
The utility model content
Serviceable life for the relay in daily living electrical equipment in the prior art is short, and very large defective arranged in the process of practical application, the utility model proposes a kind of complete isolated relay contact motion detector circuit, simple in structure, easy to use, the time point that moves from the current draw contact of relay coil, thus realized the detection that the complete isolated relay contact of household electrical appliance moves, address the deficiencies of the prior art.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of complete isolated relay contact motion detector circuit, comprise relay, the system master circuit, be connected with the control circuit integration module between described relay and the system master circuit, one side of described control circuit integration module is equipped with logic control circuit, its opposite side is equipped with current sampling circuit, be interconnected between one end of described logic control circuit and the system master circuit, its other end connects the driving triode, one end of described current sampling circuit connects logic control circuit, its other end connects relay, be provided with sampling resistor between current sampling circuit and the relay, a side of described driving triode connects fly-wheel diode.
In an embodiment of the present utility model, described control circuit integration module is control IC circuit.
End at relay described in the utility model is connected with live wire, and its other end is connected with zero line, is provided with load between zero line and the relay.
In an embodiment of the present utility model, be provided with isolated power supply between described live wire and the driving triode.
The beneficial effects of the utility model are: this product structure is simple, easy to use, circuit adopts relay coil to drive, the control circuit integration module is comprised of logic control circuit and current sampling circuit, these can be completely integrated in the IC, after the driving circuit conducting, system is with regard to the circuit in the magnetic test coil, because the inductance characteristic of coil, the electric current of coil increases gradually, when armature is inhaled lower, during namely contact contact, because the change of magnetic circuit, the inductance value of coil can increase, the electric current of coil has a decline, and be exactly the moment of contact adhesive this moment; Theory was identical when the contact disconnected, the time point that moves from the current draw contact of relay coil, thereby realized the detection that the complete isolated relay contact of household electrical appliance moves, increased the serviceable life of relay, also promoted simultaneously the efficient of using, be a kind of futuramic creation scheme, be easy to promote the use of.
Description of drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is the one-piece construction synoptic diagram of a kind of complete isolated relay contact motion detector circuit of the utility model.
Fig. 2 is the actual test waveform figure of the attracting process of a kind of complete isolated relay contact motion detector circuit of the utility model.
Fig. 3 is the actual test waveform figure of the dispose procedure of a kind of complete isolated relay contact motion detector circuit of the utility model.
100-system master circuit among the figure, 200-control circuit integration module, 300-current sampling circuit, the 400-logic control circuit, 500-fly-wheel diode, 510-sampling resistor, 410-drives triode, the isolated power supply of 600-, 700-relay, 800-load, the 810-live wire, the 820-zero line, the electric current in the 1-coil, the voltage in the 2-load.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1, a kind of complete isolated relay contact motion detector circuit, comprise relay 700, system master circuit 100, be connected with control circuit integration module 200 between described relay 700 and the system master circuit 100, one side of described control circuit integration module 200 is equipped with logic control circuit 400, its opposite side is equipped with current sampling circuit 300, be interconnected between one end of described logic control circuit 400 and the system master circuit 100, its other end connects driving triode 410, one end of described current sampling circuit 300 connects logic control circuit 400, its other end connects relay 700, be provided with sampling resistor 510 between current sampling circuit 300 and the relay 700, a side of described driving triode 410 connects fly-wheel diode 500.
In an embodiment of the present utility model, described control circuit integration module 200 is control IC circuit.
End at relay 700 described in the utility model is connected with live wire 810, and its other end is connected with zero line 820, is provided with load 800 between zero line 820 and the relay 700.
In an embodiment of the present utility model, be provided with isolated power supply 600 between described live wire 810 and the driving triode 410.
Relay often uses in we live, and the characteristic of relay is that the magnetic circuit of the iron core of coil will be closed into ring at this moment under armature can be inhaled to coil heats the time, the inductance value of coil at this moment can increase, because inductance is energy-storage travelling wave tube, wherein the energy of storage can not suddenly change, and has
, wherein E is the energy in the inductance, L is inductance value, I is the electric current in the inductance, referring to Fig. 2, Fig. 3 as using the actual test waveform figure of 24V DC load.Learn that thus the electric current that becomes suddenly in the large situation wherein when inductance value then can reduce, vice versa.
Use procedure of the present utility model is:
Attracting process: when work, sent the signal of attracting electric relay 700 by system master circuit 100, give immediately the coil electricities of relay 700 by driving triode 410 through logic control circuit 400, logic control circuit 400 beginning timing this moment, current sampling circuit 300 is by the voltage on the sampling resistor 510, and data are delivered to logic control circuit 400, logic control circuit 400 will be analyzed data, after finding negative slope to occur again to the transfer point of positive slope, logic control circuit 400 stops counting, give system master circuit 100 relay data 700 pickup time, work is finished.
Dispose procedure: system master circuit 100 sends the signal of release relay 700, logic control circuit 400 is immediately by driving triode 410 to coil blackout, logic control circuit 400 beginning timing this moment, current sampling circuit 300 is by the voltage on the sampling resistor 510, and data are delivered to logic control circuit 400, logic control circuit 400 will be analyzed data, the point of changing to negative slope again after finding positive slope to occur, logic control circuit 400 stops counting, give system master circuit 100 relay data 700 release time, work is finished.
Based on above-mentioned, the beneficial effects of the utility model are, circuit adopts relay coil to drive, the control circuit integration module is comprised of logic control circuit and current sampling circuit, these can be completely integrated in the IC, after the driving circuit conducting, system is with regard to the circuit in the magnetic test coil, because the inductance characteristic of coil, the electric current of coil increases gradually, when armature is inhaled lower, during namely contact contact, because the change of magnetic circuit, the inductance value of coil can increase, the electric current of coil has a decline, and be exactly the moment of contact adhesive this moment; Theory was identical when the contact disconnected, the time point that moves from the current draw contact of relay coil, thereby realized the detection that the complete isolated relay contact of household electrical appliance moves, increased the serviceable life of relay, also promoted simultaneously the efficient of using, be a kind of futuramic creation scheme, be easy to promote the use of.
More than show and described ultimate principle of the present utility model, principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (4)
1. complete isolated relay contact motion detector circuit, comprise relay, the system master circuit, it is characterized in that: be connected with the control circuit integration module between described relay and the system master circuit, one side of described control circuit integration module is equipped with logic control circuit, its opposite side is equipped with current sampling circuit, be interconnected between one end of described logic control circuit and the system master circuit, its other end connects the driving triode, one end of described current sampling circuit connects logic control circuit, its other end connects relay, be provided with sampling resistor between current sampling circuit and the relay, a side of described driving triode connects fly-wheel diode.
2. described a kind of complete isolated relay contact motion detector circuit according to claim 1, it is characterized in that: described control circuit integration module is control IC circuit.
3. described a kind of complete isolated relay contact motion detector circuit according to claim 1, it is characterized in that: an end of described relay is connected with live wire, and its other end is connected with zero line, is provided with load between zero line and the relay.
4. described a kind of complete isolated relay contact motion detector circuit according to claim 3 is characterized in that: described live wire and drive between the triode and be provided with isolated power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220080658 CN202886556U (en) | 2012-03-06 | 2012-03-06 | Isolation type relay contact actuation detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220080658 CN202886556U (en) | 2012-03-06 | 2012-03-06 | Isolation type relay contact actuation detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886556U true CN202886556U (en) | 2013-04-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220080658 Expired - Fee Related CN202886556U (en) | 2012-03-06 | 2012-03-06 | Isolation type relay contact actuation detecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202886556U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111597754A (en) * | 2020-04-16 | 2020-08-28 | 广东省智能制造研究所 | Fault prediction method and device for shielded gate, terminal equipment and storage medium |
| CN115248373A (en) * | 2021-04-27 | 2022-10-28 | 宁德时代新能源科技股份有限公司 | Relay adhesion detection method and device |
-
2012
- 2012-03-06 CN CN 201220080658 patent/CN202886556U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111597754A (en) * | 2020-04-16 | 2020-08-28 | 广东省智能制造研究所 | Fault prediction method and device for shielded gate, terminal equipment and storage medium |
| CN111597754B (en) * | 2020-04-16 | 2023-08-04 | 广东省智能制造研究所 | Fault prediction method and device for shielding door, terminal equipment and storage medium |
| CN115248373A (en) * | 2021-04-27 | 2022-10-28 | 宁德时代新能源科技股份有限公司 | Relay adhesion detection method and device |
| CN115248373B (en) * | 2021-04-27 | 2024-03-19 | 宁德时代新能源科技股份有限公司 | Relay adhesion detection method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20130417 Termination date: 20160306 |