CN107947109A - The electric pre-heating relay that high current is contactless - Google Patents
The electric pre-heating relay that high current is contactless Download PDFInfo
- Publication number
- CN107947109A CN107947109A CN201711449922.0A CN201711449922A CN107947109A CN 107947109 A CN107947109 A CN 107947109A CN 201711449922 A CN201711449922 A CN 201711449922A CN 107947109 A CN107947109 A CN 107947109A
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- China
- Prior art keywords
- microcontroller
- voltage
- heating relay
- electric pre
- high current
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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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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/087—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current for dc applications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/093—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means
- H02H3/0935—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current with timing means the timing being determined by numerical means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/202—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage for dc systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/047—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using a temperature responsive switch
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/222—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices for switches
Landscapes
- Control Of Resistance Heating (AREA)
Abstract
The invention discloses the electric pre-heating relay that a kind of high current is contactless, it can be realized to diesel engine intake heater grid power supply in limited time, short circuit, overvoltage, overload, overheat protector control.Rectifier bridge is connected with control terminal, and rectifier bridge exports the positive voltage for connecing the input of control end or negative voltage by being changed into positive voltage after voltage stabilizing rectification；Microcontroller receives the positive voltage of rectifier bridge output, and microcontroller has timing and temperature detection, short-circuit detecting and voltage detecting function, preset value, temperature preset value and voltage preset value, microcontroller in limited time can be set in microcontroller and is also connected with high current input terminal；Booster connects high current input terminal, and booster is also connected with microcontroller；High power tube is connected with high current input terminal, booster respectively；High-current output end is connected with microcontroller, booster and high power tube respectively.The electric pre-heating relay that the high current of the present invention is contactless can be solved the problems, such as because the contact adhesion of contact-carrying mechanical relay causes burning out for circuit.
Description
Technical field
The present invention relates to engine manufacturing field, more particularly to a kind of high current for diesel engine charge heating without
The electric pre-heating relay of contact.
Background technology
With the progress and development of diesel technology, the experience requirements of all kinds of engine performance indexs and user are not yet
Disconnected raising.Wherein, in order to improve the startability under the low temperature environment of engine, the power supply of inlet air heating grid becomes
The major measure of engine cold-start is solved at present, and because it is with the particularity that electric current is larger, working environment is more severe,
Protection control is carried out to pre- heat grate, preheating relay and preheating current source circuit when inlet air heating grid is powered just to seem particularly
It is important.Control method is effectively protected therefore, it is necessary to find, is used with reaching charge heating in function in upper and safeguard protection
Two-win.Existing preheating relay, actually controls the switch of high current by low current, can meet positive reason
Requirement under condition, but lack the control under failure and malfunction and defencive function, often due to the failure ratio of relay
Contact adhesion such as contact-carrying mechanical relay burns the major accidents such as car caused by causing long energization to cause circuit to burn out.
At present, in the market use has two kinds of preheating relay：
(1) contact-carrying machinery preheating relay, its handling characteristics are that the electromagnetism of relay is directly driven by switch or ECU
Iron controls the actuation of high current contact and disconnection, due to power cord and the storage battery of preheating be connected directly and pre- thermocurrent compared with
Greatly, contact in contact process be also easy to produce spark or using a period of time after occur after adhesion can not voluntarily open-circuit line, there is
Major safety risks；Along with quite a few mechanical relay drive end electric current is big, easily exceed ECU maximum drive abilities, after
Electric appliance and ECU matchings type selecting difficulty are larger.
(2) ordinary electronic preheating relay, is switched using solid electronic, input with output circuit by isolating transformer into
Row isolation, output terminal by metal-oxide-semiconductor field effect transistor controlling switch break-make, when preheating relay input terminal apply assigned voltage when,
The metal-oxide-semiconductor switch connection of output terminal, preheating relay work；When the input terminal of preheating relay is put plus regulation turns off voltage,
The metal-oxide-semiconductor of output terminal switches off, and preheating relay does not work；Relay on-off electricity mistake in vehicle circuit in actual use
The failure rate for causing power tube breakdown there are factors such as inverse electromotive forces in journey is higher, and power tube becomes often to turn on shape when puncturing
State, circuit is burnt out and pre- heat grate even catches fire hidden danger and risk there are larger.
The information for being disclosed in the background section is merely intended to understanding of the increase to the general background of the present invention, without answering
It has been the prior art well known to persons skilled in the art when being considered as recognizing or implying the information structure in any form.
The content of the invention
It is an object of the invention to provide the electric pre-heating relay that a kind of high current is contactless, so as to overcome the prior art
In the serious thing such as car is burnt caused by the contact adhesion of contact-carrying mechanical relay causes long energization to cause circuit to burn out
Therefore problem.
To achieve the above object, the present invention provides a kind of contactless electric pre-heating relay of high current, it includes control
End, high current input terminal, rectifier bridge, microcontroller, booster, high power tube and High-current output end processed.Rectifier bridge and control
End connection, rectifier bridge export the positive voltage for connecing the input of control end or negative voltage by being changed into positive voltage after voltage stabilizing rectification；Microcontroller
The positive voltage of rectifier bridge output is received, microcontroller has timing and temperature detection, short-circuit detecting and voltage detecting function, in list
Preset value, temperature preset value and voltage preset value, microcontroller in limited time can be set in piece machine and is also connected with high current input terminal；Rise
Press pump connects high current input terminal, and booster is also connected with microcontroller；High power tube respectively with high current input terminal, booster phase
Even；High-current output end is connected with microcontroller, booster and high power tube respectively.Wherein when microcontroller receives high level letter
Number when, microcontroller carries out short-circuit test, if test result is short circuit, microcontroller do not export Continuity signal, and high power tube is not
Conducting, electric pre-heating relay are off state, this is short-circuit protection.
Preferably, in above-mentioned technical proposal, wherein when microcontroller receives high level signal, and during without short-circuit conditions,
Microcontroller carries out over-pressed test, if the voltage transient for testing out microcontroller reception exceedes voltage preset value, microcontroller is not
Continuity signal is exported, high power tube is not turned on, and electric pre-heating relay is off state, this is overvoltage protection.
Preferably, in above-mentioned technical proposal, wherein when microcontroller receives high level signal, and without short circuit and over-pressed feelings
During condition, then microcontroller output Continuity signal, booster will arrive messenger and boost to normal voltage, being controlled to messenger after boosting
High-power pipeline leads to, and electric pre-heating relay is in the conduction state, and at the same time microcontroller starts timing, when timing time exceedes
In limited time during preset value, and microcontroller still receives high level signal at this time, then microcontroller stops output Continuity signal, high-power
Pipe is not turned on, and electric pre-heating relay is off state, this is protection in limited time.
Preferably, in above-mentioned technical proposal, wherein when high power tube is in the conduction state, microcontroller detects electronics at any time
The temperature of preheating relay itself, when detection temperature exceedes temperature preset value, then microcontroller does not export Continuity signal, high-power
Pipe is not turned on, and electric pre-heating relay is off state, this is overheat protector.
Preferably, in above-mentioned technical proposal, microcontroller is also associated with working station indicator, at electric pre-heating relay
When conducting state, working station indicator is opened, on the contrary then extinguish.
Preferably, in above-mentioned technical proposal, microcontroller is also connected with connected with outer casing bonding.
Compared with prior art, the contactless electric pre-heating relay of high current of the invention has and can overcome due to band
The contact adhesion of contact mechanical relay cause it is long be powered cause circuit burn out caused by burn the beneficial of the major accidents such as car
Effect, at the same have the function of in limited time, short circuit, overvoltage, overload, overheat protector.
Brief description of the drawings
Fig. 1 is the line construction schematic diagram of the contactless electric pre-heating relay of high current according to the present invention.
Main Reference Numerals explanation：
1- control terminals, 2- high current input terminals, 3- rectifier bridges, 4- microcontrollers, 5- boosters, 6- high power tubes, the big electricity of 7-
Flow output terminal, 8- working station indicators, 9- shell bonding.
Embodiment
Below in conjunction with the accompanying drawings, the embodiment of the present invention is described in detail, it is to be understood that the guarantor of the present invention
Protect scope and from the limitation of embodiment.
Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term " comprising " or its change
Change such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not exclude other members
Part or other parts.
As shown in Figure 1, Fig. 1 is the line construction signal of the contactless electric pre-heating relay of high current according to the present invention
Figure.The contactless electric pre-heating relay of a kind of high current of embodiment according to the present invention, it can be realized to diesel oil
Machine inlet air heating grid power supply in limited time, short circuit, overvoltage, overload, overheat protector control, the electric pre-heating that high current is contactless after
Electric appliance include control terminal 1, high current input terminal 2, D1 rectifier bridges 3, U1 microcontrollers 4, U2 boosters 5, high power tube (Vmos) 6 with
And High-current output end 7.Control terminal 1 is the control signal input of electric pre-heating relay, when 1 output control signal of control terminal
When, control terminal 1 exports high level signal, on the contrary then export low level.D1 rectifier bridges 3 are connected with control terminal 1, and D1 rectifier bridges 3 will
The positive voltage or negative voltage for connecing the input of control end are exported by being changed into positive voltage after voltage stabilizing rectification.U1 microcontrollers 4 receive D1 rectifier bridges 3
The positive voltage of output, U1 microcontrollers 4 have timing and temperature detection, short-circuit detecting and voltage detecting function, in U1 microcontrollers 4
In can set preset value, temperature preset value and voltage preset value in limited time, U1 microcontrollers 4 at the same time also with high current input terminal 2
Connection, to monitor the voltage condition of high current input terminal 2 at any time.U2 boosters 5 connect high current input terminal 2, at the same also with
U1 microcontrollers 4 connect.High power tube (Vmos) 6 is connected with high current input terminal 2, U2 boosters 5 respectively.High-current output end 7
It is connected respectively with U1 microcontrollers 4, U2 boosters 5 and high power tube (Vmos) 6.
In some embodiments, when U1 microcontrollers 4 receive high level signal, U1 microcontrollers 4 first carry out short-circuit survey
Examination, if test result is short circuit, U1 microcontrollers 4 do not export Continuity signal, and high power tube (Vmos) 6 is not turned on, and electronics is pre-
Electrothermal relay is off state, and diesel engine intake heater grid is not powered, this is short-circuit protection.
In some embodiments, when U1 microcontrollers 4 receive high level signal, and during without short-circuit conditions, U1 monolithics
Machine 4 carries out over-pressed test, if (transient state exceedes vapour when the voltage transient for testing out the reception of U1 microcontrollers 4 exceedes voltage preset value
The interference voltage of car power-supply system normal voltage range 12V or 24V), then U1 microcontrollers 4 do not export Continuity signal, high power tube
(Vmos) 6 it is not turned on, electric pre-heating relay is off state, and diesel engine intake heater grid is not powered, this is protected for overvoltage
Shield.
In some embodiments, when U1 microcontrollers 4 receive high level signal, and without short circuit and during overpressure situation,
Then U1 microcontrollers 4 export Continuity signal, and booster will arrive messenger and boost to normal voltage, big to messenger control after boosting
Power tube (Vmos) 6 leads to, and electric pre-heating relay is in the conduction state, the power supply of diesel engine intake heater grid.At the same time
U1 microcontrollers 4 start timing, when timing time exceedes preset value in limited time (preset value in limited time of the present embodiment is 240 seconds, but this
Invention is not limited thereto), and U1 microcontrollers 4 still receive high level signal at this time, then U1 microcontrollers 4 stop output conducting
Signal, high power tube (Vmos) 6 are not turned on, and electric pre-heating relay is off state, and diesel engine intake heater grid does not supply
Electricity, this is protection in limited time.
In some embodiments, after electric pre-heating relay is in protection in limited time, the control that only control terminal 1 inputs is believed
Number it is changed into low level, when being then changed into high level again, electric pre-heating relay does not have after short-circuit detecting again, overvoltage detection
After having short circuit and overpressure situation, electric pre-heating relay can just turn on again, and diesel engine intake heater grid is powered again,.
In some embodiments, when high power tube (Vmos) 6 is in the conduction state, U1 microcontrollers 4 detect electricity at any time
The sub- preheating relay temperature of itself, when detection temperature exceedes temperature preset value, (the temperature preset value of the present embodiment is 100
DEG C, but the present invention is not limited thereto), then U1 microcontrollers 4 do not export Continuity signal, and high power tube (Vmos) 6 is not turned on, electronics
Preheating relay is off state, and diesel engine intake heater grid is not powered, this is overheat protector.
In some embodiments, U1 microcontrollers 4 are also associated with working station indicator 8, at electric pre-heating relay
When conducting state, working station indicator 8 is opened, on the contrary then extinguish, i.e. by the work shape on electric pre-heating relay
State indicator light 8 can synchronously judge preheater working status (working station indicator 8 of the present embodiment for light emitting diode, but
The present invention is not limited thereto).
In some embodiments, U1 microcontrollers 4 are also connected with connected with outer casing bonding 9, ensure that electric pre-heating relay is complete
Whole circuit cycles.
Described on end, the electric pre-heating relay that high current of the invention is contactless has following excellent compared with prior art
Point：
1. relay control terminal electric current is small, load and the power consumption of control terminal can be effectively reduced；
2. electric elements and control, the relay protective scheme and crucial setup parameters such as built-in microcontroller；
3. optimizing the structure of high-power (Vmos) pipe and by electric current, more powerful pre- heat grate can be controlled, and
It can realize the open circuit processing under failure mode.
4. in internal wiring increase rectifier bridge element, it can be achieved that two control lines of control terminal just connect and reversal connection.
It is foregoing to the present invention specific exemplary embodiment description be in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to the above instruction, can be much changed
And change.The purpose of selecting and describing the exemplary embodiment is that explain that the certain principles of the present invention and its reality should
With so that those skilled in the art can realize and utilize the present invention a variety of exemplaries and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (6)
- A kind of 1. electric pre-heating relay that high current is contactless, it is characterised in that including：Control terminal；High current input terminal；Rectifier bridge, it is connected with the control terminal, and the rectifier bridge passes through the positive voltage for connecing the input of control end or negative voltage It is changed into positive voltage output after voltage stabilizing rectification；Microcontroller, it receives the positive voltage of the rectifier bridge output, preset value, temperature in limited time can be set in the microcontroller Preset value and voltage preset value, the microcontroller are also connected with the high current input terminal；Booster, it connects the high current input terminal, and the booster is also connected with the microcontroller；High power tube, it is connected with the high current input terminal, booster respectively；AndHigh-current output end, it is connected with the microcontroller, the booster and the high power tube respectively；Wherein, when the microcontroller receives high level signal, the microcontroller carries out short-circuit test, if test result is Short circuit, then the microcontroller do not export Continuity signal, the high power tube is not turned on, and the electric pre-heating relay is off State, this is short-circuit protection.
- 2. electric pre-heating relay according to claim 1, it is characterised in that wherein when the microcontroller receives high electricity During ordinary mail, and during without short-circuit conditions, the microcontroller carries out over-pressed test, if testing out the voltage that the microcontroller receives When instantaneously exceeding the voltage preset value, then the microcontroller does not export Continuity signal, and the high power tube is not turned on, the electricity Sub- preheating relay is off state, this is overvoltage protection.
- 3. electric pre-heating relay according to claim 1, it is characterised in that wherein when the microcontroller receives high electricity During ordinary mail, and without short circuit and during overpressure situation, then the microcontroller output Continuity signal, the booster will be described to communication Number normal voltage is boosted to, described after boosting controls the high-power pipeline to lead to messenger, the electric pre-heating relay In the conduction state, at the same time the microcontroller starts timing, when the timing time exceedes the preset value in limited time, and The microcontroller still receives high level signal at this time, then the microcontroller stops output Continuity signal, the high power tube It is not turned on, the electric pre-heating relay is off state, this is protection in limited time.
- 4. electric pre-heating relay according to claim 1, it is characterised in that wherein when the high power tube is on During state, the microcontroller detects the temperature of the electric pre-heating relay itself at any time, when detection temperature exceedes the temperature During preset value, then the microcontroller does not export Continuity signal, and the high power tube is not turned on, and the electric pre-heating relay is in Off state, this is overheat protector.
- 5. electric pre-heating relay according to claim 1, it is characterised in that the microcontroller is also associated with working status Indicator light, when the electric pre-heating relay is in the conduction state, the working station indicator is opened, on the contrary then extinguish.
- 6. electric pre-heating relay according to claim 1, it is characterised in that the microcontroller also connects with shell bonding Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711449922.0A CN107947109A (en) | 2017-12-27 | 2017-12-27 | The electric pre-heating relay that high current is contactless |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711449922.0A CN107947109A (en) | 2017-12-27 | 2017-12-27 | The electric pre-heating relay that high current is contactless |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107947109A true CN107947109A (en) | 2018-04-20 |
Family
ID=61940492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711449922.0A Pending CN107947109A (en) | 2017-12-27 | 2017-12-27 | The electric pre-heating relay that high current is contactless |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107947109A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638775A (en) * | 2019-02-26 | 2019-04-16 | 北京中纺恒远汽车电器有限公司 | A kind of electric pre-heating relay of diesel engine |
| CN110638335A (en) * | 2019-09-02 | 2020-01-03 | 珠海格力电器股份有限公司 | Cooking equipment safety control method and device, storage medium and cooking equipment |
| CN111648884A (en) * | 2020-06-28 | 2020-09-11 | 东风商用车有限公司 | Engine air inlet preheating system based on electronic relay |
| CN114336514A (en) * | 2021-12-27 | 2022-04-12 | 浙江正泰汽车科技有限公司 | Electronic preheating relay with protection |
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| CN207638315U (en) * | 2017-12-27 | 2018-07-20 | 广西玉柴机器股份有限公司 | The electric pre-heating relay that high current is contactless |
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| TWM275413U (en) * | 2004-12-24 | 2005-09-11 | Quitewin Technology Corp | Automatic DC power detection device |
| CN101520491A (en) * | 2008-02-27 | 2009-09-02 | 中国长城计算机深圳股份有限公司 | Testing method and device for short-circuit and over-voltage protection of switch power supply output |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109638775A (en) * | 2019-02-26 | 2019-04-16 | 北京中纺恒远汽车电器有限公司 | A kind of electric pre-heating relay of diesel engine |
| CN110638335A (en) * | 2019-09-02 | 2020-01-03 | 珠海格力电器股份有限公司 | Cooking equipment safety control method and device, storage medium and cooking equipment |
| CN111648884A (en) * | 2020-06-28 | 2020-09-11 | 东风商用车有限公司 | Engine air inlet preheating system based on electronic relay |
| CN114336514A (en) * | 2021-12-27 | 2022-04-12 | 浙江正泰汽车科技有限公司 | Electronic preheating relay with protection |
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