CN106469628B - For the protection control method of relay, device - Google Patents
For the protection control method of relay, device Download PDFInfo
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- CN106469628B CN106469628B CN201510504520.0A CN201510504520A CN106469628B CN 106469628 B CN106469628 B CN 106469628B CN 201510504520 A CN201510504520 A CN 201510504520A CN 106469628 B CN106469628 B CN 106469628B
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- relay
- voltage
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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
- H01H47/002—Monitoring or fail-safe circuits
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Abstract
The invention discloses a kind of protection control devices for relay, comprising: the first drive module；First detection module, first detection module are used to detect the voltage of the first end of relay coil to obtain first voltage；Second drive module；Second detection module, the second detection module are used to detect the voltage of the second end of relay coil to obtain second voltage；Control module; control module is according to first voltage and second voltage and is output to the control signal of the first drive module and the second drive module and judges whether the current control circuit of relay fails, and in the current control circuit failure for judging relay by controlling the first drive module and the second drive module to carry out protection control to relay.The protection control device can protect relay when the control circuit of relay fails, and improve the reliability of relay.The invention also discloses a kind of protection control methods for relay.
Description
Technical field
The present invention relates to relay technical field, in particular to a kind of protection control device and one kind for relay
Protection control method for relay.
Background technique
Currently, it is relatively more using the product that relay carries out control heating, still, when the control circuit of relay fails
When, it is likely that so that relay is constantly on state to be heated to load, to bring security risk.
Summary of the invention
The purpose of the present invention aims to solve at least above-mentioned one of technological deficiency.
For this purpose, an object of the present invention is to provide a kind of protection control device for relay, it can be in relay
Relay is protected when the control circuit failure of device, improves the reliability of relay.
It is another object of the present invention to propose a kind of protection control method for relay.
In order to achieve the above objectives, one aspect of the present invention embodiment proposes a kind of protection control device for relay,
It include: the first drive module, first drive module is connected with the first end of relay coil；First detection module, it is described
First detection module is connected with the first end of the relay coil, and the first detection module is for detecting the relay line
The voltage of the first end of circle is to obtain first voltage；Second drive module, second drive module and the relay coil
Second end be connected；Second detection module, second detection module are connected with the second end of the relay coil, and described
Two detection modules are used to detect the voltage of the second end of the relay coil to obtain second voltage；Control module, the control
Molding block is detected with first drive module, the first detection module, second drive module and described second respectively
Module is connected, and the control module is according to the first voltage and the second voltage and is output to first drive module
Judge whether the current control circuit of the relay fails with the control signal of second drive module, and described in the judgement
By controlling first drive module and second drive module to described when the current control circuit failure of relay
Relay carries out protection control.
Protection control device according to an embodiment of the present invention for relay, detects relay by first detection module
The voltage of the first end of coil is to obtain first voltage, and the electricity of the second end by the second detection module detection relay coil
For pressure to obtain second voltage, control module is according to first voltage and second voltage and is output to the first drive module and the second drive
The control signal of dynamic model block judges whether the current control circuit of relay fails, and in the current control circuit for judging relay
By the first drive module of control and the second drive module to carry out protection control to relay when failure, to effectively increase
The reliability of relay.
According to one embodiment of present invention, when the control module according to the first voltage and is output to described first
When the control signal of drive module judges that the first end of the relay coil is out of control, wherein the control module passes through control
Second drive module is so that the first voltage and the second voltage are equal, to turn off the relay；Or it is described
Control module controls the second end of the relay coil by second drive module, so that the relay is in normal
On or off state.
According to another embodiment of the invention, when the control module according to the second voltage and is output to described the
When the control signal of two drive modules judges that the second end of the relay coil is out of control, wherein the control module passes through control
First drive module is made so that the first voltage and the second voltage are equal, to turn off the relay；Or institute
The first end that control module controls the relay coil by first drive module is stated, so that the relay is in just
Normal on or off state.
In some embodiments of the invention, the circuit structure phase of first drive module and second drive module
Together.
According to one embodiment of present invention, first drive module specifically includes: first resistor, the first resistor
One end be connected with the control module；First switch tube, the first end of the first switch tube are another with the first resistor
One end is connected, and the second end of the first switch tube is connected with default power supply；Second resistance, one end of the second resistance and institute
Control module is stated to be connected；Second switch, the first end of the second switch are connected with the other end of the second resistance, institute
The second end for stating second switch is connected with the third end of the first switch tube, the third end ground connection of the second switch,
Wherein, between the second end of the second switch and the third end of the first switch tube have first node, described first
Node is connected with the first end of the relay coil.
Preferably, the first switch tube and the second switch can be triode or metal-oxide-semiconductor.
In order to achieve the above objectives, another aspect of the present invention embodiment proposes a kind of protection controlling party for relay
Method, the protection control device of the relay include the first drive module and the second drive module, first drive module with
The first end of relay coil is connected, and second drive module is connected with the second end of the relay coil, the protection
Control method is the following steps are included: detect the voltage of the first end of the relay coil to obtain first voltage, and detect institute
The voltage of the second end of relay coil is stated to obtain second voltage；According to the first voltage and the second voltage and defeated
The control signal for arriving first drive module and second drive module out judges the current control circuit of the relay
Whether fail；If it is determined that the current control circuit of the relay fails, then by controlling first drive module and institute
The second drive module is stated to carry out protection control to the relay.
Protection control method according to an embodiment of the present invention for relay detects the first end of relay coil first
Voltage to obtain first voltage, and detect relay coil second end voltage to obtain second voltage, then according to
One voltage and second voltage and it is output to the first drive module and the control signal of the second drive module judges working as relay
Whether preceding control circuit fails, if it is determined that the current control circuit of relay fails, then by the first drive module of control and
Second drive module is to carry out protection control to relay, to effectively increase the reliability of relay.
According to one embodiment of present invention, according to the first voltage and the control for being output to first drive module
When signal judges that the first end of the relay coil is out of control, wherein by controlling second drive module so that described the
One voltage and the second voltage are equal, to turn off the relay；Or by second drive module control it is described after
The second end of electric apparatus coil, so that the relay is in normal on or off state.
According to another embodiment of the invention, according to the second voltage and the control for being output to second drive module
When signal processed judges that the second end of the relay coil is out of control, wherein by controlling first drive module so that described
First voltage and the second voltage are equal, to turn off the relay；Or by described in first drive module control
The first end of relay coil, so that the relay is in normal on or off state.
The additional aspect of the present invention and advantage will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously and it is readily appreciated that, in which:
Fig. 1 is the block diagram according to the protection control device for relay of the embodiment of the present invention；
Fig. 2 is the circuit diagram according to the protection control device for relay of one embodiment of the invention；
Fig. 3 is the circuit diagram according to the protection control device for relay of another embodiment of the present invention；And
Fig. 4 is the flow chart according to the protection control method for relay of the embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.For letter
Change disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples, and
It is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or letter.It is this heavy
It is for purposes of simplicity and clarity, itself not indicate the relationship between discussed various embodiments and/or setting again.This
Outside, the present invention provides various specific techniques and material example, but those of ordinary skill in the art may be aware that
The applicable property of other techniques and/or the use of other materials.In addition, fisrt feature described below second feature it
The structure of "upper" may include the embodiment that the first and second features are formed as directly contacting, and also may include other feature shape
At the embodiment between the first and second features, such first and second feature may not be direct contact.
In the description of the present invention, it should be noted that unless otherwise specified and limited, term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, the connection being also possible to inside two elements can
, can also indirectly connected through an intermediary, for the ordinary skill in the art to be to be connected directly, it can basis
Concrete condition understands the concrete meaning of above-mentioned term.
With reference to the accompanying drawings come describe the embodiment of the present invention proposition for relay protection control device and be used for
The protection control method of relay.
Fig. 1 is the block diagram according to the protection control device for relay of the embodiment of the present invention.Such as Fig. 1 institute
Show, which includes the first drive module 10, first detection module 20, the second drive module
30, the second detection module 40 and control module 50.
Wherein, the first drive module 10 is connected with the first end of relay coil K, first detection module 20 and relay line
The first end for enclosing K is connected, and first detection module 20 is used to detect the voltage of the first end of relay coil K to obtain the first electricity
Pressure, the second drive module 30 are connected with the second end of relay coil K, and the second of the second detection module 40 and relay coil K
End is connected, and the second detection module 40 is used to detect the voltage of the second end of relay coil K to obtain second voltage, control module
50 are connected with the first drive module 10, first detection module 20, the second drive module 30 and the second detection module 40 respectively, control
Module 50 is according to first voltage and second voltage and is output to the control of the first drive module 10 and the second drive module 30 and believes
Number judge whether the current control circuit of relay fails, and passes through control in the current control circuit failure for judging relay
First drive module 10 and the second drive module 30 are to carry out protection control to relay.
According to one embodiment of present invention, when control module 50 according to first voltage and is output to the first drive module 10
Control signal when judging that the first end of relay coil K is out of control, wherein control module 50 passes through the second drive module 30 of control
So that first voltage and second voltage are equal, to turn off relay；Or control module 50 is controlled by the second drive module 30
The second end of relay coil K, so that relay is in normal on or off state.
According to another embodiment of the invention, when control module 50 according to second voltage and is output to the second drive module
When 30 control signal judges that the second end of relay coil K is out of control, wherein control module 50 passes through the first drive module of control
10 so that first voltage and second voltage are equal, to turn off relay；Or control module 50 is controlled by the first drive module 10
The first end of relay coil K processed, so that relay is in normal on or off state.
In some embodiments of the invention, the first drive module 10 is identical as the circuit structure of the second drive module 30.
According to one embodiment of present invention, as shown in Fig. 2, the first drive module 10 specifically includes first resistor R1,
One switching tube Q1, second resistance R2 and second switch Q2, wherein one end of first resistor R1 is connected with control module 50, the
The first end of one switching tube Q1 is connected with the other end of first resistor R1, the second end of first switch tube Q1 and default power supply VCC
It is connected, one end of second resistance R2 is connected with control module 50, and the first end of second switch Q2 is another with second resistance R2's
End is connected, and the second end of second switch Q2 is connected with the third end of first switch tube Q1, the third termination of second switch Q2
Ground GND, wherein between the second end of second switch Q2 and the third end of first switch tube Q1 have first node J1, first
Node J1 is connected with the first end of relay coil K.
Preferably, first switch tube Q1 and second switch Q2 can be triode or metal-oxide-semiconductor.
Since the first drive module 10 in above-described embodiment is identical with the circuit structure of the second drive module 30, this
In no longer the circuit structure of the second drive module 30 is described.
A specific example according to the present invention, as shown in figure 3, the electricity of first detection module 20 and the second detection module 40
Line structure is identical, and first detection module 20 is made of the 5th resistance R5, wherein one end of the 5th resistance R5 and first node
J1 is connected, the other end and control module 50 such as MCU (Micro Controller Unit, micro-control unit) of the 5th resistance R5
It is connected.It is understood that the circuit structure of first detection module 20 and the second detection module 40 can also be different, as long as can
Timely and accurately detect first voltage and second voltage.
The work for carrying out the protection control device for relay of the present invention is described in detail embodiment below with reference to Fig. 3 is former
Reason.
The control device of traditional relay is that the first end of relay coil and default power supply is made to be constantly in conducting shape
State controls the on-off of relay by the connection between the second end and ground of control relay coil.But it is filled in the control
In setting, if the control terminal of relay fails, for example, the port damage etc. of short circuit or control terminal occurs for control circuit, all will
Cause relay to be in constant conduction state, so that AC power source gives always load to provide electric energy, brings security risk.
And for the present invention, as shown in figure 3, when the normally opened contact of relay needs to be attracted so that AC power source is to negative
When carrying power supply, the actuation of relay normally open contact: the first signal end of first, MCU can be realized by two kinds of control modes
P1.0 exports low level so that first switch tube Q1 is connected, so that default power supply VCC be made to supply to the first end of relay coil K
Electricity, meanwhile, the 6th signal end P1.5 output high level of MCU is so that the 4th switching tube Q4 is connected, to make relay coil K's
Second end is grounded GND, forms current path, relay coil K obtain it is electric after, the normally opened contact of relay is attracted, and AC power source is given
Load supplying；The third signal end P1.2 output high level of second, MCU are so that second switch Q2 is connected, to make relay
The first end of coil K is grounded GND, meanwhile, the fourth signal end P1.3 output low level of MCU so that third switching tube Q3 is connected,
To make default power supply VCC power to the second end of relay coil K, form current path, relay coil K obtain it is electric after, after
The normally opened contact of electric appliance is attracted, AC power source powering load.
And to the principle that relay is protected are as follows: the second signal end P1.1 of MCU is obtained current by the 5th resistance R5
The voltage of the first end of relay coil K to obtain first voltage, and judge first voltage be default power supply VCC voltage or
The voltage of ground GND, and being compared with the first signal end P1.0 and third signal end P1.2 the control signal exported, to judge the
Whether one voltage and the control signal of the first signal end P1.0 and third signal end P1.2 output meet control rule, if be not inconsistent
Close control rule, then it represents that the failure of control circuit such as the first drive module 10.
For example, when the voltage that first voltage be default power supply VCC, and control signal that the first signal end P1.0 is exported and
When the control signal of third signal end P1.0 output is high level, the failure of the first drive module 10 is indicated, pass through MCU's at this time
Fourth signal end P1.3 exports low level so that third switching tube Q3 is connected, so that the voltage at the both ends relay coil K is equal
To preset the voltage of power supply VCC, and then turn off relay.It certainly, can also be in order to make relay can continue to work normally
High level is exported by the 6th signal end P1.5 of MCU so that the 4th switching tube Q4 is connected, so that relay be made to work on.
When first voltage be ground GND voltage, and the first signal end P1.0 output control signal and third signal end
When the control signal of P1.2 output is low level, also illustrates that control circuit such as the first drive module 10 fails, pass through MCU at this time
The 6th signal end P1.5 output high level so that the 4th switching tube Q4 be connected so that the voltage at the both ends relay coil K
For the voltage of ground GND, and then turn off relay.Certainly, in order to make relay can continue to work normally, can also be passed through
Four signal end P1.3 export low level so that third switching tube Q3 is connected, so that relay be made to work on.
It is understood that when the failure of control circuit such as the second drive module 30, principle that relay is protected
Protection philosophy when failing with the first drive module 10 is identical, just no longer describes here.
In short, MCU passes through control relay coil when MCU detects one end appearance control failure of relay coil K
The drive module of the other end of K keeps the voltage of the other end of relay coil K equal with the failure voltage at end, to turn off relay
Device realizes self-shield when relay control failure.It is also possible to the voltage of the other end by control relay coil K
It realizes the turn-on and turn-off of relay, relay is enable to work normally.
In conclusion the protection control device according to an embodiment of the present invention for relay, passes through first detection module
The voltage of the first end of relay coil is detected to obtain first voltage, and relay coil is detected by the second detection module
For the voltage of second end to obtain second voltage, control module is according to first voltage and second voltage and is output to the first driving mould
Block and the control signal of the second drive module judge whether the current control circuit of relay fails, and are judging working as relay
By the first drive module of control and the second drive module to carry out protection control to relay when preceding control circuit fails, thus
Effectively increase the reliability of relay.
Fig. 4 is the flow chart according to the protection control method for relay of the embodiment of the present invention, wherein relay
Protecting control device includes the first drive module and the second drive module, the first end phase of the first drive module and relay coil
Even, the second drive module is connected with the second end of relay coil.As shown in figure 4, this is used for the protection control method of relay
The following steps are included:
S1 detects the voltage of the first end of relay coil to obtain first voltage, and detects the second of relay coil
The voltage at end is to obtain second voltage.
S2 believes according to first voltage and second voltage and the control for being output to the first drive module and the second drive module
Number judge whether the current control circuit of relay fails.
S3 then passes through the first drive module of control and the second driving if it is determined that the current control circuit of relay fails
Module is to carry out protection control to relay.
According to one embodiment of present invention, judged according to first voltage with the control signal for being output to the first drive module
When the first end of relay coil is out of control, wherein by the second drive module of control so that first voltage and second voltage are equal,
To turn off relay；Or the second end of relay coil is controlled by the second drive module, so that relay is in normal
On or off state.
According to another embodiment of the invention, sentenced according to second voltage with the control signal for being output to the second drive module
When the second end of disconnected relay coil is out of control, wherein by the first drive module of control so that first voltage and second voltage phase
Deng to turn off relay；Or the first end of relay coil is controlled by the first drive module, so that relay is in normal
On or off state.
Specifically, the control method of traditional relay is to be constantly in the first end of relay coil with default power supply
On state controls the on-off of relay by the connection between the second end and ground of control relay coil.But at this
In control method, if the control terminal of relay fails, for example, short circuit or the port damage of control terminal occur for control circuit
Deng, all will lead to relay and be in constant conduction state so that AC power source give always load provide electric energy, bring safety
Hidden danger.
And for the present invention, it can pass through the conducting that two kinds of control modes realize relay: first, pass through control the
One drive module so that default power supply is powered to the first end of relay coil, meanwhile, by the second drive module of control so that
The second end of relay coil is grounded, and relay is connected to form current path；Second, by controlling the first drive module
So that the first end of relay coil is grounded, meanwhile, by the second drive module of control so that default power supply is to relay coil
Second end power supply, relay is connected to form current path.
A specific example according to the present invention, as shown in figure 3, MCU the first signal end P1.0 output low level so that
First switch tube Q1 conducting, so that default power supply VCC is made to power to the first end of relay coil K, meanwhile, the 6th letter of MCU
Number end P1.5 output high level so that the 4th switching tube Q4 be connected, thus make relay coil K second end be grounded GND, formed
Current path, relay coil K obtain it is electric after, the normally opened contact of relay is attracted, AC power source powering load；Or MCU
Third signal end P1.2 exports high level so that second switch Q2 is connected, so that the first end of relay coil K be made to be grounded
GND, meanwhile, the fourth signal end P1.3 output low level of MCU is so that third switching tube Q3 is connected, to make default power supply VCC
To the second end power supply of relay coil K, form current path, relay coil K obtain it is electric after, the normally opened contact of relay is inhaled
It closes, AC power source powering load.
And to the principle that relay is protected are as follows: detect the voltage of the first end of relay coil to obtain the first electricity
Pressure, and detect relay coil second end voltage to obtain second voltage, according to first voltage and second voltage and defeated
Judge whether the current control circuit of relay meets control to the control signal of the first drive module and the second drive module out
Rule judges current control circuit failure if not meeting control rule.
A specific example according to the present invention, as shown in figure 3, when the voltage that first voltage is default power supply VCC, and the
When the control signal of one signal end P1.0 output and the control signal of third signal end P1.0 output are high level, control is indicated
The failure of circuit processed such as the first drive module exports low level so that third switching tube by the fourth signal end P1.3 of MCU at this time
Q3 conducting, so that the voltage at the both ends relay coil K is the voltage of default power supply VCC, and then turns off relay.When
So, in order to make relay can continue to work normally, high level can also be exported by the 6th signal end P1.5 of MCU so that the
Four switching tube Q4 conducting, so that relay be made to work on.
When first voltage be ground GND voltage, and the first signal end P1.0 output control signal and third signal end
It when the control signal of P1.2 output is low level, also illustrates that control circuit such as the first drive module fails, passes through MCU's at this time
6th signal end P1.5 exports high level so that the 4th switching tube Q4 is connected, so that the voltage at the both ends relay coil K is
The voltage of ground GND, and then turn off relay.Certainly, in order to make relay can continue to work normally, the 4th can also be passed through
Signal end P1.3 exports low level so that third switching tube Q3 is connected, so that relay be made to work on.
It is understood that when second voltage, the control signal of fourth signal end P1.3 and the 6th signal end P1.5 output
When not meeting control rule, the principle protected to relay is identical as above-mentioned principle, just no longer describes here.
In short, MCU passes through control relay coil when MCU detects one end appearance control failure of relay coil K
The drive module of the other end of K keeps the voltage of the other end of relay coil K equal with the failure voltage at end, to turn off relay
Device realizes self-shield when relay control failure.It is also possible to the voltage of the other end by control relay coil K
It realizes the turn-on and turn-off of relay, relay is enable to work normally.
Protection control method according to an embodiment of the present invention for relay detects the first end of relay coil first
Voltage to obtain first voltage, and detect relay coil second end voltage to obtain second voltage, then according to
One voltage and second voltage and it is output to the first drive module and the control signal of the second drive module judges working as relay
Whether preceding control circuit fails, if it is determined that the current control circuit of relay fails, then by the first drive module of control and
Second drive module is to carry out protection control to relay, to effectively increase the reliability of relay.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes
It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion
Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable
Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use
In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system, including the system of processor or other can be held from instruction
The instruction fetch of row system, device or equipment and the system executed instruction) it uses, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium ", which can be, any may include, stores, communicates, propagates or pass
Defeated program is for instruction execution system, device or equipment or the dress used in conjunction with these instruction execution systems, device or equipment
It sets.The more specific example (non-exhaustive list) of computer-readable medium include the following: there is the electricity of one or more wirings
Interconnecting piece (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable
Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned
In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage
Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware
Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal
Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries
It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium
In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
It, can also be in addition, each functional unit in each embodiment of the present invention can integrate in a processing module
It is that each unit physically exists alone, can also be integrated in two or more units in a module.Above-mentioned integrated mould
Block both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module is such as
Fruit is realized and when sold or used as an independent product in the form of software function module, also can store in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is by appended claims and its equivalent limits.
Claims (5)
1. a kind of protection control device for relay characterized by comprising
First drive module, first drive module are connected with the first end of relay coil；
First detection module, the first detection module are connected with the first end of the relay coil, the first detection mould
Block is used to detect the voltage of the first end of the relay coil to obtain first voltage；
Second drive module, second drive module are connected with the second end of the relay coil；
Second detection module, second detection module are connected with the second end of the relay coil, the second detection mould
Block is used to detect the voltage of the second end of the relay coil to obtain second voltage；
Control module, the control module drive with first drive module, the first detection module, described second respectively
Module is connected with second detection module, and the control module is according to the first voltage and the second voltage and output
Control signal to first drive module and second drive module judges that the current control circuit of the relay is
No failure, and in the current control circuit failure for judging the relay by controlling first drive module and described the
Two drive modules are to carry out protection control to the relay, wherein when the control module according to the first voltage and
Be output to first drive module control signal judge the relay coil obtain first end it is out of control when, by control described in
Second drive module is so that first voltage and second voltage are equal, to turn off relay；Or pass through second drive module
The second end of the relay coil is controlled, so that the relay is in normal on or off state,
When the control module is judging institute with the control signal for being output to second drive module according to the second voltage
State relay coil second end it is out of control when, by control first drive module so that the first voltage and described second
Voltage is equal, to turn off the relay；Or the first end of the relay coil is controlled by first drive module,
So that the relay is in normal on or off state.
2. being used for the protection control device of relay as described in any of claims 1, which is characterized in that described first drives
Dynamic model block is identical as the circuit structure of second drive module.
3. being used for the protection control device of relay as claimed in claim 2, which is characterized in that the first drive module tool
Body includes:
First resistor, one end of the first resistor are connected with the control module；
First switch tube, the first end of the first switch tube are connected with the other end of the first resistor, the first switch
The second end of pipe is connected with default power supply；
Second resistance, one end of the second resistance are connected with the control module；
Second switch, the first end of the second switch are connected with the other end of the second resistance, the second switch
The second end of pipe is connected with the third end of the first switch tube, the third end of second switch ground connection, wherein described the
Between the second end of two switching tubes and the third end of the first switch tube have first node, the first node and it is described after
The first end of electric apparatus coil is connected.
4. being used for the protection control device of relay as claimed in claim 3, which is characterized in that the first switch tube and institute
Stating second switch is triode or metal-oxide-semiconductor.
5. a kind of protection control method for relay, which is characterized in that the protection control device of the relay includes the
One drive module and the second drive module, first drive module are connected with the first end of relay coil, and described second drives
Dynamic model block is connected with the second end of the relay coil, the protection control method the following steps are included:
The voltage of the first end of the relay coil is detected to obtain first voltage, and detects the second of the relay coil
The voltage at end is to obtain second voltage；
According to the first voltage and the second voltage and it is output to first drive module and the second driving mould
The control signal of block judges whether the current control circuit of the relay fails；
If it is determined that the current control circuit of the relay fails, then by controlling first drive module and described second
Drive module is to carry out protection control to the relay, wherein is being driven according to the first voltage with being output to described first
The control signal of dynamic model block judge the relay coil obtain first end it is out of control when, by controlling second drive module so that
First voltage and second voltage are equal, to turn off relay；Or the relay line is controlled by second drive module
The second end of circle, so that the relay is in normal on or off state；
The relay coil is being judged with the control signal for being output to second drive module according to the second voltage
When second end is out of control, by controlling first drive module so that the first voltage and the second voltage are equal, to close
Break the relay；Or the first end of the relay coil is controlled by first drive module, so that the relay
Device is in normal on or off state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510504520.0A CN106469628B (en) | 2015-08-17 | 2015-08-17 | For the protection control method of relay, device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510504520.0A CN106469628B (en) | 2015-08-17 | 2015-08-17 | For the protection control method of relay, device |
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| CN106469628B true CN106469628B (en) | 2019-05-31 |
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| CN201510504520.0A Active CN106469628B (en) | 2015-08-17 | 2015-08-17 | For the protection control method of relay, device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112230132B (en) * | 2020-04-14 | 2024-04-19 | 北京国家新能源汽车技术创新中心有限公司 | Device and method for detecting failure of high-voltage relay of battery management system |
| CN113285424A (en) * | 2021-05-27 | 2021-08-20 | 广东美的厨房电器制造有限公司 | Power supply circuit, control method of power supply circuit, cooking apparatus, and storage medium |
| CN113985107B (en) * | 2021-11-23 | 2022-09-16 | 珠海格力电器股份有限公司 | Voltage detection method and device and readable storage medium |
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| CN106469628A (en) | 2017-03-01 |
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