CN207503871U - A kind of relay - Google Patents
A kind of relay Download PDFInfo
- Publication number
- CN207503871U CN207503871U CN201721471081.9U CN201721471081U CN207503871U CN 207503871 U CN207503871 U CN 207503871U CN 201721471081 U CN201721471081 U CN 201721471081U CN 207503871 U CN207503871 U CN 207503871U
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- Prior art keywords
- relay
- contact
- limiting element
- current limiting
- utility
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- 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.)
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Abstract
The utility model embodiment discloses a kind of relay, and including relay coil, normally opened contact, normally-closed contact and diode, the relay further includes current limiting element；Wherein, the diode is in parallel with relay coil；The current limiting element is in parallel with relay normally open contact, for before relay normally open contact is closed, power supply to carry out low current charge by current limiting element to load capacitance.The utility model embodiment is realized before relay opening, is charged by resistance low current for load capacitance, no longer momentary arcing during opening relay.
Description
Technical field
The utility model is related to electronic control device technical field more particularly to a kind of relays.
Background technology
Relay is a kind of switching device with current control, is essential actuator in various automatic control circuits
Part, it is extremely wide in field of electric control application.
Current existing relay is made of relay coil, contact, is controlled using existing relay
During high power load, since load both ends are with the presence of capacitance, there is a large amount of charge to flow into capacitance, generation when opening relay
It surges electric current, it may appear that momentary arcing can cause relay terminal to melt for a long time.
Utility model content
The utility model embodiment provides a kind of relay, and when opening relay in the prior art with solution, generation is gushed
, there is the technical issues of momentary arcing in unrestrained electric current.
The utility model embodiment provides a kind of relay, including relay coil, normally opened contact, normally-closed contact and two
Pole pipe, the relay further include current limiting element；
Wherein, the diode is in parallel with relay coil；
The current limiting element is in parallel with relay normally open contact, for before relay normally open contact is closed, power supply to pass through
Current limiting element carries out low current charge to load capacitance.
In above-mentioned technical proposal, it is preferred that the current limiting element is appointed in fixed value resistance, varistor or thermistor
Meaning is a kind of.
A kind of relay that the utility model embodiment provides, by the in parallel current limiting element of relay normally open contact,
Before relay normally open contact closure, power supply carries out low current charge by current limiting element to load capacitance, so as to fulfill beating
Open relay when, be not in momentary arcing between relay contact.
Description of the drawings
Fig. 1 is a kind of circuit theory schematic diagram for relay that the utility model embodiment provides；
Fig. 2 is a kind of circuit theory schematic diagram for relay external load that the utility model embodiment provides.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that herein
Described specific embodiment is used only for explaining the utility model rather than the restriction to the utility model.It further needs exist for
It is bright, part relevant with the utility model rather than entire infrastructure are illustrated only for ease of description, in attached drawing.
Fig. 1 is a kind of circuit theory schematic diagram for relay that the utility model embodiment one provides, which includes
Relay coil 6, normally opened contact (contact 3,5), normally-closed contact (contact 3,4) and diode 7, the relay further include current limliting member
Part 8.
Wherein, the diode 7 is in parallel with relay coil 6, specifically, the anode of diode 7 and relay coil 6
1 end is connected, and the cathode of diode 7 is connected with 2 ends of relay coil 6.
The current limiting element 8 is in parallel with relay normally open contact (contact 3,5), in relay normally open contact (contact
3rd, 5) before being closed, power supply carries out low current charge by current limiting element 8 to load capacitance.The current limiting element 8 be fixed value resistance,
Any one in varistor or thermistor.
When controlling high power load using the relay implement body, circuit connection diagram is as shown in Figure 2.Wherein, with normally opened contact
The both ends of the current limiting element R of (contact 3,5) parallel connection are connected respectively with power supply, load.It is closed in relay normally open contact (contact 3,5)
Before conjunction, power supply carries out low current charge by current limiting element R to the capacitance in load.After load capacitance is fully charged, be closed after
During electric appliance normally opened contact (contact 3,5), load capacitance can be poured in avoid a large amount of charges, and then ensure will not between relay contact
There is the situation of momentary arcing.
A kind of relay that the utility model embodiment provides, by the in parallel current limiting element of relay normally open contact,
Before relay normally open contact closure, power supply carries out low current charge by current limiting element to load capacitance, so as to fulfill beating
Open relay when, be not in momentary arcing between relay contact.
Note that it above are only the preferred embodiment of the utility model and institute's application technology principle.Those skilled in the art's meeting
Understand, the utility model is not limited to specific embodiment described here, can carry out for a person skilled in the art various bright
Aobvious variation is readjusted and is substituted without departing from the scope of protection of the utility model.Therefore, although passing through above example
The utility model is described in further detail, but the utility model is not limited only to above example, is not departing from
In the case that the utility model is conceived, other more equivalent embodiments can also be included, and the scope of the utility model is by appended
Right determine.
Claims (2)
- A kind of 1. relay, including relay coil, normally opened contact, normally-closed contact and diode, which is characterized in that the relay Device further includes current limiting element；Wherein, the diode is in parallel with relay coil；The current limiting element is in parallel with relay normally open contact, for before relay normally open contact is closed, power supply to pass through current limliting Element carries out low current charge to load capacitance.
- 2. relay according to claim 1, which is characterized in that the current limiting element be fixed value resistance, varistor or Any one in thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721471081.9U CN207503871U (en) | 2017-11-07 | 2017-11-07 | A kind of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721471081.9U CN207503871U (en) | 2017-11-07 | 2017-11-07 | A kind of relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207503871U true CN207503871U (en) | 2018-06-15 |
Family
ID=62503598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721471081.9U Active CN207503871U (en) | 2017-11-07 | 2017-11-07 | A kind of relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207503871U (en) |
-
2017
- 2017-11-07 CN CN201721471081.9U patent/CN207503871U/en active Active
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |