CN201732731U - Small current controlling device of relay - Google Patents
Small current controlling device of relay Download PDFInfo
- Publication number
- CN201732731U CN201732731U CN2009203510481U CN200920351048U CN201732731U CN 201732731 U CN201732731 U CN 201732731U CN 2009203510481 U CN2009203510481 U CN 2009203510481U CN 200920351048 U CN200920351048 U CN 200920351048U CN 201732731 U CN201732731 U CN 201732731U
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Abstract
A small current controlling device of a relay comprises a control module, a power supply voltage sampling module, a contact current sampling module, a relay driving end and a controlling input end, and the power supply sampling module, the contact current sampling module, the relay driving end and the controlling input end are connected with the controlling module. The small current controlling device is characterized in that the controlling module further comprises a timing device for powering on before the relay is on and powering off before the relay is off. The small current controlling device is used for controlling devices of relays.
Description
Technical field:
The present invention relates to electron controls technology, specifically a kind of low current of relay control device.
Background technology:
Electromagnetic relay commonly used is to power up to solenoid to make the armature adhesive, and drives moving contact and fixed contact closure, otherwise then anti-.
General relay is usually used in AC power is carried out the switch relay, when relay contact will cause the arc erosion of contact easily when big electric current carries out switch motion, and cause bigger electromagnetism wave amplitude blackberry lily to disturb, electric equipment is damaged because of big impulse current, and this is that present relay uses the problem that exists.
One of solution is proposed by following patent documentation in the prior art: Chinese patent application number is 200910053005.X, and name is called: method of zero passage switch of electromagnetic relay and circuit.The deficiency of this technical scheme is all will whether check for alternating voltage and carry out error correction that when relay disconnects in addition preferably constantly is not zero alternating current pressure point zero point to relay-operating time point at every turn, but the minimum current point.
Summary of the invention:
The purpose of this invention is to provide a kind of low current of relay control method and device thereof.
See Fig. 1, the present invention adopts following technical scheme, a kind of low current of relay control device, comprise control module, also comprise the supply voltage sampling module, contact current sampling module, relay drive end and the control input end that are connected with described control module, it is characterized in that described control module comprises that also relay closes action powers up in advance and disconnects the timing device that action is cut off the power supply in advance.
Described a kind of low current of relay control device is characterized in that described control module also comprises the device that the difference between current threshold value transfinites and handles.
Described a kind of low current of relay control device is characterized in that also comprising the relay that is connected with described relay drive end.
Described a kind of low current of relay control device is characterized in that relay is 3 cross streams electrical relays.
A kind of low current of relay control device, comprise control module, also comprise supply voltage sampling module, contact current sampling module and the relay drive end, the control input end that are connected with described control module, it is characterized in that control module comprises the following device that is connected in order:
A. be used for when the adhesive drive signal occurs constantly near the device of moment closing relay contact minimum voltage (definitely) value back 1 to n cycle constantly of described power supply according to minimum voltage (definitely) value of detected power supply wave shape;
B. be used for maybe when disconnecting drive signal and occur constantly according to minimum current (definitely) value of detected relay contact current waveform, described minimum current (definitely) value near back 1 to n cycle in the moment moment disconnect the device of relay contact.
Described a kind of low current of relay control device is characterized in that described control module also comprises with lower device:
C. be used for having set respectively in advance that relay powers up in advance or the power-off time value, when relay switch is operated, the device that described relay control device powered up or cuts off the power supply described relay in advance according to relay actuation time.
Described a kind of low current of relay control device is characterized in that described C device also comprises with lower device:
D. preestablished the difference between current threshold value, be used to detect the current value of described relay contact and temporary, return the device of execution B step when the electric current of described relay contact and the current value in the preceding corresponding moment in 1 cycle differ by more than described difference between current threshold value before will cutting off the power supply.
A kind of low current of relay control device, comprise control module, also comprise the supply voltage sampling module, contact current sampling module, relay drive end and the control input end that are connected with described control module, it is characterized in that program circuit (as shown in Figure 3) function that described control module comprises is:
Function 1. when the adhesive drive signal occurs according to minimum voltage (definitely) value of detected power supply wave shape constantly, near moment closing relay contact minimum voltage (definitely) value back 1 to n cycle constantly of described power supply;
Function 2. according to minimum current (definitely) the value moment of detected relay contact current waveform, disconnects relay contact in described minimum current (definitely) value constantly near back 1 to n cycle constantly when the disconnection drive signal occurs.
Described a kind of low current of relay control device is characterized in that the program circuit function that described control module also comprises is:
Function 3. has set respectively in advance that relay powers up in advance or the power-off time value, and when relay was carried out switching manipulation, described relay control device was according in advance described relay being powered up relay actuation time or cutting off the power supply.
Close to do the explanation of function 3: with minimum voltage/electric current (definitely) value moment is benchmark, the power cycle T time is deducted in advance power up/or after power-off time (for example 20mS-5mS=15mS) carries out timing, power up or power operation to relay again.
Described a kind of low current of relay control device is characterized in that the program circuit function that also comprises again of described control module is:
Function 4. has preestablished the difference between current threshold value, detect the current value of described relay contact and temporary, then return execution function 2 when the electric current of described relay contact and the current value in the preceding corresponding moment in 1 cycle differ by more than described difference between current threshold value before will cutting off the power supply.
The advantage of technical scheme of the present invention is the arc erosion that obviously reduced relay contact, reduce electromagnetism wave amplitude blackberry lily that spark causes disturbs and helps prolonging electric equipment useful life; Another advantage of technical scheme of the present invention is to can be used for DC power supply or 3 cross streams power supplys.
Description of drawings
Fig. 1 is the low current of relay control device structural representation of the single-phase or DC power supply of the present invention;
Fig. 2 is the low current of relay control device structural representation of the present invention's 3 phase power supplys;
Fig. 3 is a control module software program flow chart of the present invention.
Embodiment:
Below in conjunction with accompanying drawing the present invention is described in further details.
The ac power frequency of relay control device switch of the present invention is generally 50Hz to 400Hz, and its voltage and load current waveform all have the identical cycle, and relay control device of the present invention can detect automatically to the AC power cycle; Relay control device of the present invention also can be used for the switch of DC power supply.
Power supply minimum voltage of the present invention detects: promptly the minimum (definitely) of detection supply voltage is worth and goes out now in a power cycle.
Relay contact minimum current of the present invention detects: promptly be worth and go out now in the minimum (definitely) of a power cycle range detection contact load current.
Relay closes of the present invention is electromagnetic coil relay operate time and powers up time difference to the closing of contact; Relay of the present invention disconnects and being operate time time difference that electromagnetic coil relay is powered down to the contact disconnection.Its closed action time of same relay is normally inequality operate time with disconnection, again in order to solve each relay actuation time of mutually different problem, can control module test automatically operate time in the relay control device production process or behind the relay that more renews, and closure/disconnection value operate time all is stored in is provided with the back in the control module and uses the closure/disconnection of relay.
If can obtain fastest response speed when being set near closure constantly of minimum voltage/current value back 1 cycle constantly or disconnected relay switch contacts in the technical solution of the present invention.The moment is that the moment of emphasizing closure or disconnection relay contact, constantly neighbouring (for example 0-2mS) also filled perhaps as long as deviation is no more than ideal near the described cycle.
Low current of relay control device structure is described as follows:
1. the supply voltage sampling module is used for sampling detection power supply wave shape, and the simplest mode is to add A/D function IC with the sampling of voltage divider resistance to form.
2. the contact current sampling module is used for sampling detection contact current waveform, and the simplest mode is to add A/D function IC with current sampling resistor to form.
3. described control module can be made of monolithic computer, and its computer software programs that include are realized the timer counter function of described control module function and relay actuation time.Also can include A/D by monolithic or embedded computer realizes detecting mains voltage waveform and detects the contact current waveform.
4. described control module also can be made of the ASIC circuit, and its application-specific integrated circuit (ASIC) that includes is used to realize the timer counter function of described control module function and relay actuation time.Also can include A/D by ASIC realizes detecting mains voltage waveform and detects the contact current waveform.
5. the relay drive end is used to connect relay.
6. the control input end is used for accepting to the relay switch command signal, and can be used as the instruction input port that the closure of relay/disconnection is tested operate time automatically.
When low current of relay control device of the present invention is used for the relay of three-phase alternating-current supply, the most direct mode is to be used in combination with three low current of relay control device, be about to three control input end parallel connections, 3 relay contacts are controlled 3 power supply phase lines respectively and are got final product.Or connect 3 supply voltage sampling modules respectively with a control module (also can be only with 1 supply voltage sampling module for industrial three phase sine power supply, other 2 phase voltage waveforms can be calculated and obtain) and 3 current sample modules and 3 relay drive ends, 1 control input end form, see Fig. 3 for details.
Claims (5)
1. low current of relay control device, comprise control module, also comprise the supply voltage sampling module, contact current sampling module, relay drive end and the control input end that are connected with described control module, it is characterized in that described control module comprises that also relay closes action powers up in advance and disconnects the timing device that action is cut off the power supply in advance.
2. according to the described a kind of low current of relay control device of claim 1, it is characterized in that described control module also comprises the device that the difference between current threshold value transfinites and handles.
3. according to the described a kind of low current of relay control device of claim 1, it is characterized in that also comprising the relay that is connected with described relay drive end.
4. according to the described a kind of low current of relay control device of claim 3, it is characterized in that described relay is 3 cross streams electrical relays.
5. according to the described a kind of low current of relay control device of claim 3, it is characterized in that described control module comprises that 1 supply voltage sampling module and 3 current sample modules, 3 relay drive ends, 1 control input end form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203510481U CN201732731U (en) | 2009-12-17 | 2009-12-17 | Small current controlling device of relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203510481U CN201732731U (en) | 2009-12-17 | 2009-12-17 | Small current controlling device of relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201732731U true CN201732731U (en) | 2011-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203510481U Expired - Fee Related CN201732731U (en) | 2009-12-17 | 2009-12-17 | Small current controlling device of relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201732731U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943410A (en) * | 2014-04-22 | 2014-07-23 | 宁波燎原电器集团股份有限公司 | Automatic switchover switching circuit based on magnetic latching relay |
| CN107658181A (en) * | 2017-10-19 | 2018-02-02 | 深圳南云微电子有限公司 | A kind of contactor electricity-saving appliance |
-
2009
- 2009-12-17 CN CN2009203510481U patent/CN201732731U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103943410A (en) * | 2014-04-22 | 2014-07-23 | 宁波燎原电器集团股份有限公司 | Automatic switchover switching circuit based on magnetic latching relay |
| CN103943410B (en) * | 2014-04-22 | 2016-01-20 | 宁波燎原电器集团股份有限公司 | Based on the auto-switch circuit of magnetic latching relay |
| CN107658181A (en) * | 2017-10-19 | 2018-02-02 | 深圳南云微电子有限公司 | A kind of contactor electricity-saving appliance |
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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 |
Granted publication date: 20110202 Termination date: 20141217 |
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| EXPY | Termination of patent right or utility model |