CN208522457U - Peak current suppression circuit and electrical equipment - Google Patents
Peak current suppression circuit and electrical equipment Download PDFInfo
- Publication number
- CN208522457U CN208522457U CN201820622244.7U CN201820622244U CN208522457U CN 208522457 U CN208522457 U CN 208522457U CN 201820622244 U CN201820622244 U CN 201820622244U CN 208522457 U CN208522457 U CN 208522457U
- Authority
- CN
- China
- Prior art keywords
- relay
- current
- circuit
- load
- control circuit
- 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.)
- Active
Links
Landscapes
- Relay Circuits (AREA)
Abstract
A kind of peak current suppression circuit and electrical equipment, circuit includes the first power port and second source port, it further include the first relay, the second relay, current limiting device and control circuit, the operating current of first relay is greater than the operating current of second relay；First relay is connected between first power port and load/power supply first end, the second end of the load/power supply is connect with the second source port, it is in parallel with first relay after second relay and current limiting device series connection, form current supply circuit；When the current supply circuit is connected, the control circuit controls second relay and is closed prior to first relay, and when the current supply circuit disconnects, the control circuit is turned off after controlling second relay in first relay.It is connected in use process with low current and low current disconnects circuit, reduced the arc erosion of switch contact, improve device lifetime.
Description
Technical field
The utility model belongs to electronic circuit technology field more particularly to a kind of peak restrained circuit and electrical equipment.
Background technique
In robot/electric vehicle automatic charging technology, charging pile and robot/electric vehicle are often independent and separate
, robot/electric vehicle charging contact and charging pile contact point are changed into connection shape from discrete state when charging is required
State.If it is with single Relay base switch, then very possible robot also just touch also adjustment position but without
When contacting good, charger just exports high current, and robotic contact point and charging pile contact point is easy to generate electric arc at this time
It corrodes；Seriously affect service life and appearance.Relay is also because connect instantaneous large-current impact, hence it is evident that influences service life.
Also some robots/electric vehicle product, circuit makees battery and connects detection in the charger inside charging pile, needs
Additionally increase exchanges straighten current circuit give control circuit power supply, increase cost and with it is difficult to install；Increased country 3C (China
Compulsory Certification, Compulsory Certification of Products system) or CR (China Robot, Chinese robot) recognize
Card difficulty, and certification rectification are costly.Because AC to DC circuit is easy to generate EMI (Electromagnetic
Interference, electromagnetic interference) problem.In addition charger is general shipment, and detection cell voltage, which has to charger, to be exported
Charging current is usually less than 1 second, this 1 second robot has often just been touched without being filled so can generate to connecting
Electric staking contact, robotic contact point generate arc erosion, influence appearance.It corrodes and often has an effect on charging current and become smaller.
And then influence charging effect.
Also some robot products, circuit makees battery and connects detection in the charger inside charging pile, and main component fills
Electric appliance is general shipment, and detection cell voltage, which has to charger output charging current, to be usually less than 1 second, if changing charging
Delay time after locating voltage detecting, then belonging to customed product, cost is very high.
Utility model content
The utility model provides a kind of peak current suppression circuit and electrical equipment, it is intended to solve traditional peak current and lead
Cause switch contact by arc erosion, device lifetime low problem.
A kind of peak current suppression circuit, including the first power port and second source port, further include the first relay,
Second relay, current limiting device and control circuit, the operating current of first relay are greater than the work of second relay
Make electric current；
First relay is connected between first power port and load/power supply first end, and the load/
The second end of power supply is connect with the second source port, with described the after second relay and current limiting device series connection
One relay is in parallel, forms current supply circuit；
The control circuit is connect with first relay and second relay, when the current supply circuit is connected,
The control circuit controls second relay and is closed prior to first relay, described when the current supply circuit disconnects
Control circuit turns off after controlling second relay in first relay.
When the current supply circuit is connected in one of the embodiments, described the is turned off after first relay closure
Two relays；
When the current supply circuit disconnects, second relay is first closed turns off first relay afterwards, then turns off institute
State the second relay.
The control circuit is single-chip microcontroller or PLC in one of the embodiments,.
The current limiting device is resistor in one of the embodiments,.
In addition, a kind of electrical equipment is additionally provided, including power load and above-mentioned peak current suppression circuit.
Above-mentioned peak current suppression circuit accesses current supply circuit by the relay of two different operating electric currents, is using
It is connected in the process with low current and low current disconnects circuit, reduced the arc erosion of switch contact, improve device lifetime.
Detailed description of the invention
Fig. 1 is the peak current suppression circuit schematic diagram that an embodiment of the present invention provides；
Fig. 2 is the peak current suppression circuit schematic diagram that another embodiment of the utility model provides.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
In one embodiment, referring to Fig. 1, peak current suppression circuit can be applied to the electricity consumption with power load
Equipment, such as clean robot, electric vehicle etc., power load can be power circuit, servo motor or energy-storage battery etc..
In still further embodiment, referring to Fig. 2, peak current suppression circuit can also be applied on power supply unit, such as charging pile,
Power supply device etc..Peak current suppression circuit includes the first power port 11 and second source port 12, the first power port 11
With second source port 12 be power input terminal or power output terminal, can in alternating current circuit and also be used in direct current
On circuit.
Fig. 1 and Fig. 2 are please referred to, peak current suppression circuit further includes the first relay 100, the second relay 200, limit
Device 300 and control circuit 400 are flowed, (specified) operating current of the first relay 100 is greater than (specified) of the second relay 200
Operating current.
First relay 100 is connected between the first power port 11 and the first end of load/power supply 500, load/power supply
500 second end is connect with second source port, the second relay 200 and current limiting device 300 connect after with the first relay
100 is in parallel, forms current supply circuit 10.As it can be seen that the first relay 100 and the second relay 200 can be used for controlling current supply circuit 10
Turn-on and turn-off.
Control circuit is connect with the first relay 100 and the second relay 200, when current supply circuit 10 is connected, control circuit
400 control the second relays 200 be closed prior to the first relay 100, i.e., so that current supply circuit 10 powers on when, elder generation with low current
Conducting reduces the arc erosion of relay interior contact point.Greatly prolong relay service life.When current supply circuit 10 disconnects,
Control circuit 400 turns off after controlling the second relay 200 in the first relay 100, is finally turned off with low current, reduces relay
The arc erosion of interior contact point.Greatly prolong relay service life.
In a more specific embodiment, when current supply circuit 10 is connected, the second relay is turned off after the first relay 100 closure
200, reduce energy consumption.When current supply circuit 10 disconnects, the second relay 200, which is first closed, to be turned off the first relay 100 afterwards and closes, then is turned off
Second relay 200.Current limiting device 300 is resistor in one of the embodiments, for example with conventional, electric-resistance or can be born
Temperature coefficient thermistor.Control circuit 404 is that (Programmable Logic Controller, can by single-chip microcontroller or PLC
Programmed logic controller).Used in natively there are the occasions such as single-chip microcontroller or PLC, do not need additionally to increase cost.It is very big to have
Economic benefit
Some equipment are that power supply has output for a long time, and loads 500 and turn on or off according to demand.Connect load 500
There are the surge current far beyond specified decades of times or hundreds of times in moment or disconnection 500 moments of load.Surge current can allow
Product greatly accelerates aging, or even damage.
The working principle of circuit: original state is illustrated with one, in the case that power input has electricity, load 500
It is isolated with power input.It loads at 500 without any electric current, no power waste.When connection in need loads 500 (power supplies
Circuit 10) when, control circuit 400 exports control signal to the second relay 200, and the second relay 200 changes from off-state
For on-state, electric current passes through current limiting device 300 again to the second relay 200 by the first power port 11, then arrives again negative
Load/power supply 500；The presence of current limiting device 300 controls dash current in range.Control circuit 400 is defeated again after 0.5-3 seconds
Control signal allows the first relay 100 to open out.Current limiting device 300 and the circuit of the second relay 200 are ineffective at this time, electricity
Stream all passes through from the first relay 100.Output control signal is small cut-off after control circuit 400 postpones 1 second at this time,
Reduce energy consumption.
When circuit is on state, if wanting to disconnect load/power supply 500 (current supply circuit 10) in next step, the
Under one relay, 100 opening state, the second relay 200 is opened.The first relay 100 is closed after 1 second；Electric current is by inputting at this time
Anode, again to the second relay 200, then arrives load/power supply 500 by current limiting device 300 again；Because current limiting device 300 is deposited
, hence it is evident that inhibit moment to disconnect serious 500 situation of throw load/power supply caused by large current load 500, thus reduce after
The arc erosion of electric appliance interior contact point.Greatly prolong relay service life.It should be noted that utilizing control circuit 400
The opening and closing for controlling relay is the prior art.
Above-mentioned peak current suppression circuit accesses current supply circuit 10 by the relay of two different operating electric currents, makes
Circuit is disconnected with low current with connecting in the process with low current, reduces the arc erosion of switch contact, improves device lifetime.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (5)
1. a kind of peak current suppression circuit, including the first power port and second source port, which is characterized in that further include
One relay, the second relay, current limiting device and control circuit, the operating current of first relay be greater than described second after
The operating current of electric appliance；
First relay is connected between first power port and load/power supply first end, the load/power supply
Second end connect with the second source port, second relay and the current limiting device series connection after with described first after
Electric appliance is in parallel, forms current supply circuit；
The control circuit is connect with first relay and second relay, described when the current supply circuit is connected
Control circuit controls second relay and is closed prior to first relay, when the current supply circuit disconnects, the control
It is turned off after second relay described in circuit control in first relay.
2. peak current suppression circuit as described in claim 1, which is characterized in that when the current supply circuit is connected, described the
Second relay is turned off after one relay closure；
When the current supply circuit disconnects, second relay is first closed turns off first relay afterwards, then turns off described the
Two relays.
3. peak current suppression circuit as described in claim 1, which is characterized in that the control circuit be single-chip microcontroller or
PLC。
4. peak current suppression circuit as described in claim 1, which is characterized in that the current limiting device is resistor.
5. a kind of electrical equipment, including power load, which is characterized in that further include the described in any item spikes of Claims 1-4
Current suppressing circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820622244.7U CN208522457U (en) | 2018-04-27 | 2018-04-27 | Peak current suppression circuit and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820622244.7U CN208522457U (en) | 2018-04-27 | 2018-04-27 | Peak current suppression circuit and electrical equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208522457U true CN208522457U (en) | 2019-02-19 |
Family
ID=65341229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820622244.7U Active CN208522457U (en) | 2018-04-27 | 2018-04-27 | Peak current suppression circuit and electrical equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208522457U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364993A (en) * | 2019-03-01 | 2019-10-22 | 华为技术有限公司 | A kind of break-up device and inverter system |
| CN112467813A (en) * | 2019-09-09 | 2021-03-09 | 宁波拓邦智能控制有限公司 | Method and system for opening and closing current limit of battery management system |
-
2018
- 2018-04-27 CN CN201820622244.7U patent/CN208522457U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364993A (en) * | 2019-03-01 | 2019-10-22 | 华为技术有限公司 | A kind of break-up device and inverter system |
| US11979019B2 (en) | 2019-03-01 | 2024-05-07 | Huawei Digital Power Technologies Co., Ltd. | Direct current breaker feeding an inverter |
| CN112467813A (en) * | 2019-09-09 | 2021-03-09 | 宁波拓邦智能控制有限公司 | Method and system for opening and closing current limit of battery management system |
| CN112467813B (en) * | 2019-09-09 | 2023-11-17 | 宁波拓邦智能控制有限公司 | Method and system for opening and closing current limiting of battery management system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203799201U (en) | Power supply control device | |
| CN103871784B (en) | relay mutation impact protection system and method thereof | |
| US10217585B2 (en) | Control circuit for composite switch with contact protection based on diode and relay control method | |
| WO2019019949A1 (en) | Direct-current arc-extinguishing device | |
| CN106879147B (en) | Single-live-wire full-power touch switch circuit | |
| CN208522457U (en) | Peak current suppression circuit and electrical equipment | |
| CN208127862U (en) | No-voltage opens switch, induction controller and the lamps and lanterns closed with zero current | |
| CN2800620Y (en) | Intelligent zero-cross opening or closing gate breaker | |
| CN204967236U (en) | Leakage protector | |
| CN105553245A (en) | Soft start circuit | |
| CN203250689U (en) | Constant magnetic-holding alternating-current contactor control circuit | |
| CN110416009B (en) | Arc-free long-life relay switch circuit and controller | |
| CN203859527U (en) | Improved capacitor switching circuit | |
| CN201830223U (en) | Active and passive combined power switch | |
| CN107202955B (en) | Device and method for indirectly detecting on-off state of vacuum contactor | |
| CN207558699U (en) | A kind of special control relay of automobile door and window | |
| CN203014692U (en) | Rectifying device used for inverter experiment | |
| CN204790456U (en) | A on -off control device for family's power management | |
| CN204761017U (en) | Electric automobile power battery contactor protection device | |
| CN201928186U (en) | Sliding frequency soft startup circuit applied to electromagnetic induction heating power supply | |
| CN110880745B (en) | Active resistance-capacitance type direct current limiter based on double-capacitance oscillation and control method | |
| CN104633238B (en) | There is the electricity-saving type alternating current electromagnetic valve of triode type switching pulse generation circuit | |
| CN201845710U (en) | Arc extinguishing circuit of AC relay | |
| CN208591011U (en) | Switch gate applied to dish-washing machine protects circuit | |
| CN203747367U (en) | Alternating current circuit switching-on and switching-off device adopting bidirectional thyristor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |