CN105225895B - A kind of intelligent DC contactor - Google Patents
A kind of intelligent DC contactor Download PDFInfo
- Publication number
- CN105225895B CN105225895B CN201510672005.3A CN201510672005A CN105225895B CN 105225895 B CN105225895 B CN 105225895B CN 201510672005 A CN201510672005 A CN 201510672005A CN 105225895 B CN105225895 B CN 105225895B
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- Prior art keywords
- module
- relay
- power
- voltage
- power electronic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
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- Relay Circuits (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a kind of intelligent DC contactor, mainly including power module, instruction model module, one-chip computer module, relay module and electric power electronic module and voltage detection module.The equipment combination conventional contacts relay, which is persistently powered, not to generate heat and Arc-free advantage during power electronic element power on/off, effectively prevents conventional contacts relay and easily generates the shortcomings that electric arc causes fire hazard, protects the safety in utilization of equipment.Meanwhile detected by intelligent voltage, under-voltage protection and overvoltage protection carry out electrical equipment according to voltage value, protection system electrical safety improves equipment service life.
Description
Technical field
The design belongs to technical field of electricity, New-energy electric vehicle technical field, more specifically to electric vehicle
The invention of DC power supply intelligent control technology.
Background technology
With the progress and improvement of living standard of mankind's science and technology, application of the DC power supply in production and living is increasingly
It is more, it is particularly substantially on mobile equipment and portable instrument by the use of DC power supply as the equipment energy, such as electronic vapour
Vehicle, electri forklift etc..May require that using nature for DC power supply carries out switch control to DC power supply, needs to use direct current contact
Device, due to direct-current arc unlike alternating current arc has natural zero-crossing point, the main contacts of D.C. contactor is in disjunction larger current (direct current
Circuit) when, arc extinguishing is more difficult, often generates strong electric arc, easily burn contact and delay cut-off.Arc extinguishing is direct current contact
One technology key points and difficulties of device, for rapid arc extinguishing, D.C. contactor generally using magnetic blow-out formula arc-control device, and equipped with every
Plate and clay arc-extinguish chamber.Or electric arc is reduced using vacuum chamber mode.Either magnetic blow-out formula arc extinguishing or vacuum chamber arc extinguishing all can
The process structure of D.C. contactor is caused to complicate, so as to greatly improve D.C. contactor manufacture cost, and reduces direct current
The reliability of contactor.
It needs to be detected DC voltage judgement in the application field of many DC power supplies, according to the variation of supply voltage
The work of D.C. contactor is controlled, so as to protect power supply or instrument and equipment, such as it is by storing to power on warm wind in electric vehicle
Battery is powered by D.C. contactor, this just needs electric heating wind to have under-voltage protection function, when cell voltage because feed reduces
When need in time close point a warm wind, otherwise will cause the over-discharge of battery and damage accumulator, so as to cause accumulator
It scraps.Some similary application fields are in order to protect load equipment to need to carry out overvoltage protection.Direct current contact currently on the market
Device is all passive type structure, can not perceive DC voltage, it is impossible to accomplish the function of power supply overvoltage/undervoltage protection.
Invention content
For the technological deficiency and industry requirement of current D.C. contactor, the present invention is by combining power electronics, automatic control
The multi-disciplinary technology creations such as system propose a solution, have invented a kind of intelligent DC contactor, can be very
Good solution techniques as described above problem.
The technical scheme is that：
A kind of intelligent DC contactor, including power module 4, command signal module 5, one-chip computer module 6, relay mould
Block 7, electric power electronic module 8 and voltage detection module 3；One-chip computer module 6 and power module 4, command signal module 5, relay
Module 7, electric power electronic module 8 and voltage detection module 3 are electrically connected；Power module 4 is made of power end 1 and load end 2；
Voltage detection module 3 is connected between power end 1 and load end 2, detects the voltage of power module 4；Relay module 7 and electric power
It is connected between power end 1 and load end 2 after 8 parallel connection of electronic module；One-chip computer module 6 controls relay module 7 and electric power electricity
8 break-make of submodule.
The electric arc of common D.C. contactor is stored by inductive load during contacts of contactor direct current disjunction currently on the market
Magnetic field energy instantaneous relase, high energy arc is generated at breakpoint, electric arc be easy to cause fire hazard, therefore it is required that D.C. contactor
With preferable arc-suppression function.
Compared with prior art, (MOSFET, IGBT etc., the device have lasting hair to introducing power electronic element in the present invention
Hot shortcoming), using its characteristic contactless, without arc starting, by used in parallel with contact relay, need to be powered and open
When, power electronic element is opened first, which generates without electric arc, while relay contact-voltage is reduced to close to zero,
Second step closing relay, due to almost no-voltage between contact when relay is closed, so electric arc will not be generated, third step is disconnected
Power electronic element is opened, follow current is allowed only to circulate by relay, thus is avoided that power electronic element continues heating power and asks
Topic.Its similary disconnection process is also classified into 3 steps and walks, and the first step is closed power electronic element, and second step disconnects relay, and third step is disconnected
Power electronic element is opened, completes the disconnection process of D.C. contactor.The arcing problems that relay is effectively avoided to generate, solve simultaneously
Power electronic devices be persistently powered easy fever the characteristics of.The present invention devises a set of automatic detection voltage and Intelligent Information Processing system
System, by detection and collection of the voltage detection module to electrical equipment information of voltage, while command signal module receives external open
OFF signal, unlike signal is all emitted to one-chip computer module and carries out Intelligent treatment, and entire electrical equipment state is accused, so
Under-voltage protection is carried out according to voltage value afterwards, while can also realize overvoltage protection, such as when direct current power source voltage is higher than load
Overvoltage protection is carried out during the voltage value that can be born, turns off D.C. contactor, load is avoided to be damaged due to overtension.Due to adopting
Voltage detecting is carried out with high-precision single machine, accuracy of detection is very high, and overvoltage/undervoltage numerical value accurately can be controlled, and this hair
It is bright very easily to change protection voltage value, it is only necessary to software parameters are changed without changing hardware circuit, it is convenient and efficient.
Preferably：The power module is a switch power supply system, and high voltage power supply, which is converted to low-tension supply, to be supplied
Give working power of the system as control power supply and microcontroller.
Preferably：The command signal module is a modular converter, receives external switching signal, is converted to interior
Portion's signal gives microcontroller, as the action foundation under microcontroller non-protect mode.
More preferably：The command signal module also has and has the function of Phototube Coupling, realizes external command circuit
With the electrical isolation of D.C. contactor circuit.
Preferably：The one-chip computer module is the control core of D.C. contactor, receives the information of modules, meter
Control rule is calculated, controls relay module and the break-make of electric power electronic module.
Preferably：The voltage detection module is that the voltage of DC power supply is detected by bleeder circuit, as system
Overvoltage, the foundation of low-voltage protection realize the nucleus module of system overvoltage/undervoltage defencive function.
Preferably：The relay module is made of relay drive circuit and relay, realize microcontroller to after
The switch control of electric appliance.
Preferably：The electric power electronic module is made of power electronics driving circuit and power electronic element, is realized
Microcontroller controls the switch of power electronic element.
More preferably：The electric power electronic module together forms holding for no arc dc switch with relay module
Row unit.
The beneficial effects of the invention are as follows：
It is persistently powered and does not generate heat and Arc-free advantage during power electronic element power on/off with reference to conventional contacts relay,
It effectively prevents conventional contacts relay and easily generates the shortcomings that electric arc causes fire hazard, protect the safe to use of equipment
Property.Meanwhile detected by intelligent voltage, under-voltage protection and overvoltage protection, protection system carry out electrical equipment according to voltage value
System electrical safety, improves equipment service life.
Description of the drawings
Fig. 1 is DC contactor system construction drawing of the present invention.
Each label represents wherein in figure：
1st, power end；2nd, load end；3rd, voltage detection module；4th, power module；5th, command signal module；6th, microcontroller mould
Block；7th, relay module；8th, electric power electronic module.
Specific embodiment
As shown in Figure 1, a kind of intelligent DC contactor, including power module 4, command signal module 5, one-chip computer module
6th, relay module 7, electric power electronic module 8 and voltage detection module 3；One-chip computer module 6 and power module 4, command signal mould
Block 5, relay module 7, electric power electronic module 8 and voltage detection module 3 are electrically connected；Power module 4 is by power end 1 and bears
End 2 is carried to form；Voltage detection module 3 is connected between power end 1 and load end 2；Relay module 7 and electric power electronic module 8
It is connected to after parallel connection between power end 1 and load end 2；One-chip computer module 6 controls relay module 7 and electric power electronic module 8 logical
It is disconnected.Voltage detection module 3 is detected the voltage for the power module 4 that power end 1 is formed with load end 2, testing result feedback
Intelligent treatment is carried out to one-chip computer module 6, then instructs relay module 7 and the switch order of electric power electronic module 8.Instruction letter
Number module 5 receives the external switch signal under nonprotected state, returns to one-chip computer module 6, relay is instructed after intelligence computation
The switch order of module 7 and electric power electronic module 8.
Contactor opening process is divided into 3 steps, opens power electronic element first, the process without electric arc generate, while after
Appliance contact voltage drop is as low as close to zero, second step closing relay, due to almost no-voltage between contact when relay is closed,
So electric arc will not be generated, third step disconnects power electronic element, and follow current is allowed only to circulate by relay, thus is avoided that
Power electronic element continues heating power problem.Its similary disconnection process is also classified into 3 steps and walks, and the first step is closed power electronics member
Part, second step disconnect relay, and third step disconnects power electronic element, completes the disconnection process of D.C. contactor.Electric appliance telecommunications
It number is inputted by voltage detection module 3, is exported by power module 4.
The course of work of voltage detection module is that high-voltage DC power supply voltage Vh is converted by the bleeder circuit of R1 and R2
Into that can carry out voltage detecting by the low tension Vi of monolithic machine testing, the C1 in circuit is filtered, improve circuit resist it is dry
Ability is disturbed, ensures voltage detecting precision.Voltage divider principle is：
Vi=Vh*R2/ (R1+R2)
Since R2/ (R1+R2) is definite value, it is seen that Vi and Vh is linear relationship, microcontroller by detecting Vi it may determine that
Go out the voltage value of power supply Vh, under-voltage protection is then carried out according to voltage value, while can also realize overvoltage protection, such as when straight
Overvoltage protection is carried out when stream supply voltage is higher than the voltage value that load can be born, turns off D.C. contactor, avoids load because of electricity
It presses through high and damages.Due to carrying out voltage detecting using high-precision single machine 1 ', accuracy of detection is very high, can be to overvoltage/undervoltage numerical value
Accurately controlled, and the present invention can very easily change protection voltage value, it is only necessary to change software parameters without
Hardware circuit is changed, it is convenient and efficient.
In addition to the above embodiments, the present invention can also have other embodiment, all using equal replacement or equivalent
The technical solution formed is converted, is within the scope of the present invention.
Claims (6)
1. a kind of intelligent DC contactor, it is characterised in that：Including power module, command signal module, one-chip computer module, after
Electrical appliance module, electric power electronic module and voltage detection module；One-chip computer module and power module, command signal module, relay
Module, electric power electronic module and voltage detection module are electrically connected；Power module is made of power end and load end；Voltage is examined
It surveys module to be connected between power end and load end, detects the voltage of power module；Relay module and electric power electronic module are simultaneously
It is connected between power end and load end after connection；One-chip computer module controls relay module and electric power electronic module difference break-make；
Electric power electronic module forms the execution unit of no arc dc switch together with relay module；Relay module is by relay driving
Circuit and relay composition realize that one-chip computer module controls the switch of relay；Electric power electronic module is driven by power electronics
Circuit and power electronic element composition realize that one-chip computer module controls the switch of power electronic element；When needing energization unlatching,
Electric power electronic module is opened first, relay contact-voltage is reduced to close to zero, second step closing relay, third step is broken
Power electronic element is opened, follow current is allowed only to circulate by relay；Disconnection process first step closure power electronic element, second
Step disconnects relay, and third step disconnects power electronic element, completes the disconnection process of D.C. contactor.
2. intelligent DC contactor according to claim 1, it is characterised in that：Power module is a Switching Power Supply system
High voltage power supply is converted to working power of the low-tension supply feed system as control power supply and microcontroller by system.
3. intelligent DC contactor according to claim 1, it is characterised in that：Command signal module is a modulus of conversion
Block receives external switching signal, is converted to internal signal and gives one-chip computer module, as under one-chip computer module non-protect mode
Action foundation.
4. intelligent DC contactor according to claim 3, it is characterised in that：Command signal module also has and has photoelectricity
Isolation features realize the electrical isolation of external command circuit and D.C. contactor circuit.
5. intelligent DC contactor according to claim 1, it is characterised in that：One-chip computer module is D.C. contactor
Control core receives the information of modules, calculates control rule, controls relay module and the difference of electric power electronic module
Break-make.
6. intelligent DC contactor according to claim 1, it is characterised in that：Voltage detection module is by dividing electricity
The voltage of DC power supply is detected on road, as system overvoltage, the foundation of low-voltage protection, realizes system overvoltage/undervoltage defencive function
Nucleus module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510672005.3A CN105225895B (en) | 2015-10-13 | 2015-10-13 | A kind of intelligent DC contactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510672005.3A CN105225895B (en) | 2015-10-13 | 2015-10-13 | A kind of intelligent DC contactor |
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| Publication Number | Publication Date |
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| CN105225895A CN105225895A (en) | 2016-01-06 |
| CN105225895B true CN105225895B (en) | 2018-06-29 |
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| CN201510672005.3A Active CN105225895B (en) | 2015-10-13 | 2015-10-13 | A kind of intelligent DC contactor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105810507A (en) * | 2016-05-19 | 2016-07-27 | 上海西阔电子科技有限公司 | Adaptive arc-suppression circuit board for electromagnetic relay |
| EP3971927A1 (en) | 2020-09-16 | 2022-03-23 | ABB Schweiz AG | Contactor control |
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|---|---|---|---|---|
| CN2411615Y (en) * | 1999-12-07 | 2000-12-20 | 胜利油田金岛实业公司劳动服务公司 | Flexible inserted motor energy-saving device |
| CN2509704Y (en) * | 2001-12-20 | 2002-09-04 | 福州大学 | Intelligent mixed DC contactor |
| CN101159193A (en) * | 2007-09-28 | 2008-04-09 | 珠海格力电器股份有限公司 | Control method and system for prolonging electric service life of single-phase relay and alternating current contactor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2301784Y (en) * | 1997-04-21 | 1998-12-23 | 浙江三强科技工业有限公司 | Compound non-arcing DC circuit breaker |
| CN100342468C (en) * | 2004-09-22 | 2007-10-10 | 林社振 | low arc AC contactor |
| CN2779579Y (en) * | 2004-10-15 | 2006-05-10 | 翟国富 | Mixed style direct current switch electric |
| CN201041776Y (en) * | 2007-04-29 | 2008-03-26 | 上海云骅电子科技有限公司 | Mechanical electronic compound relay |
| CN101266888B (en) * | 2008-04-30 | 2010-07-07 | 哈尔滨工业大学 | A high-power mixed DC contactor and its control method |
| CN104637734B (en) * | 2015-02-06 | 2019-03-15 | 孙毅彪 | Without electric arc power circuit breaker |
| CN205122482U (en) * | 2015-10-13 | 2016-03-30 | 青岛博瑞电气有限公司 | Intelligent direct current contactor |
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- 2015-10-13 CN CN201510672005.3A patent/CN105225895B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2411615Y (en) * | 1999-12-07 | 2000-12-20 | 胜利油田金岛实业公司劳动服务公司 | Flexible inserted motor energy-saving device |
| CN2509704Y (en) * | 2001-12-20 | 2002-09-04 | 福州大学 | Intelligent mixed DC contactor |
| CN101159193A (en) * | 2007-09-28 | 2008-04-09 | 珠海格力电器股份有限公司 | Control method and system for prolonging electric service life of single-phase relay and alternating current contactor |
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| CN105225895A (en) | 2016-01-06 |
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