CN206421994U - A kind of relay coil drive circuit controlled based on PWM ripples - Google Patents
A kind of relay coil drive circuit controlled based on PWM ripples Download PDFInfo
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- CN206421994U CN206421994U CN201621419303.8U CN201621419303U CN206421994U CN 206421994 U CN206421994 U CN 206421994U CN 201621419303 U CN201621419303 U CN 201621419303U CN 206421994 U CN206421994 U CN 206421994U
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Abstract
The utility model provides a kind of relay coil drive circuit controlled based on PWM ripples, including current acquisition module and microprocessor module, the electric current that microprocessor module is collected according to current acquisition module, to control its output to the dutycycle of the PWM ripples of drive module.The relay coil drive circuit controlled based on PWM ripples that the utility model is provided, can be gathered the electric current in major loop in real time by current acquisition module, the current value for flowing through relay coil is calculated in real time；And by relevant set of information on microprocessor module, microprocessor module is according to the size of electric current, constantly regulate PWM ripple dutycycles, so that the average current of relay coil and the maintenance electric current of relay coil match, energy consumption during relay steady operation is preferably minimized, while it also avoid the heating of relay coil.
Description
Technical field
The utility model is related to relay coil actuation techniques field, more particularly to a kind of relay controlled based on PWM ripples
Device coil driver.
Background technology
Relay is a kind of electronic control device, and it is to be gone to control one kind of larger current " to open automatically with less electric current
Close ".Play in circuit automatically adjust, safeguard protection, the effect such as change-over circuit.At present, relay is also substantial amounts of is applied to vapour
Car including new-energy automobile field；Particularly in new-energy automobile, not only the security performance to relay has higher requirements, and
And the energy consumption of relay in itself is also required that higher.
In the control mode of current relay, majority directly feeds relay using the nominal pick-up voltage of relay.Such as
It is part circuit structure schematic diagram shown in Fig. 1；Sustained diode 1 is in parallel with relay KM1, is then connected on input VCC
Between Q1.This circuit structure is simple, and cost is low, and the shortcoming of this scheme is after relay adhesive, due to supply voltage one
Relay coil two ends directly are added in, relay coil can be caused to generate heat and energy dissipation.The use at present to relay is not met
It is required that, particularly in new energy car, to the high request of relay energy consumption itself.
The content of the invention
The utility model is intended to solve at least one above-mentioned technical problem to a certain extent that there is provided one kind energy can be reduced
Consumption, the relay coil drive circuit controlled based on PWM ripples for reducing relay coil heating.
Therefore, the utility model provides a kind of relay coil drive circuit controlled based on PWM ripples, including：Power supply,
The major loop that switch element and relay coil are composed in series；Fly-wheel diode, the fly-wheel diode and the relay line
It is connected on after circle is in parallel between the switch element and the power supply；Drive module, the drive module is connected on the power supply
Both positive and negative polarity between；The drive module is used for the control signal for receiving microprocessor module output, and controls the switch member
The break-make of part；Current acquisition module, the current acquisition block coupled in series is in the major loop, and the current acquisition module is used for
Gather the electric current in major loop and input current signal to microprocessor module；Microprocessor module, the microprocessor mould
Block includes signal input and signal output, and the signal input is connected with the current acquisition module, and the signal is defeated
Outlet is connected with the drive module；The signal input is used to receive the electric current letter that the current acquisition module transmission comes
Number, the signal output is used for output control signal to the drive module；The microprocessor module is according to the electric current
Signal controls the PWM ripple dutycycles of the control signal of the signal output output.
In some embodiments, the switch element is metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor and one end of relay coil connect
Connect, the grid of the metal-oxide-semiconductor is connected with the drive module, the source electrode of the metal-oxide-semiconductor is connected with the positive pole of power supply.
In some embodiments, the 4th resistance is in series between the negative pole of the grid of the metal-oxide-semiconductor and the power supply.
In some embodiments, the negative electrode of the fly-wheel diode is connected with one end of the relay coil, the afterflow
The anode of diode is connected with the other end of the relay coil, and the other end of the relay coil is electrically connected to the electricity
The negative pole in source.
In some embodiments, the current acquisition module includes being connected on the other end of the relay coil and the electricity
The 5th resistance between the negative pole in source, first segment is provided between the 5th resistance and the other end of the relay coil
Point, the first node is electrically connected with the signal input of the microprocessor module.
In some embodiments, the current acquisition module include filter circuit, the filter circuit include the 6th resistance and
Filter capacitor, one end of the 6th resistance is connected with the signal input, and the other end is connected with the first node；It is described
One end of filter capacitor is connected with one end of the 6th resistance, the other end ground connection of the filter capacitor.
In some embodiments, the drive module includes first resistor, second resistance, 3rd resistor, the first triode, the
Two triodes and the 3rd triode, one end of the first resistor are connected with the signal output, the first resistor it is another
One end is connected with the base stage of first triode；One end of the second resistance is connected with the base stage of the first triode, described
The other end of second resistance is connected with the negative pole of power supply；The emitter stage of first triode is connected with the negative pole of power supply, described
The colelctor electrode of first triode is connected with one end of the 3rd resistor；The other end of the 3rd resistor and the power supply are just
Pole is connected；The one end of the base stage of second triode and the 3rd triode with the 3rd resistor is connected, and the described 2nd 3
The colelctor electrode of pole pipe is connected with the positive pole of the power supply, the transmitting of the emitter stage of second triode and the 3rd triode
Pole is connected with the switch element, and the colelctor electrode of the 3rd triode is connected to the negative pole of power supply.
The relay coil drive circuit controlled based on PWM ripples that the utility model is provided, can pass through current acquisition mould
Block gathers the electric current in major loop in real time, and the current value for flowing through relay coil is calculated in real time；And relevant set of information exists
On microprocessor module, microprocessor module is according to the size of electric current, constantly regulate PWM ripple dutycycles so that relay coil
Average current and the maintenance electric current of relay coil match so that energy consumption during relay steady operation can be dropped to most
It is low, while it also avoid the heating of relay coil.
Additional aspect and advantage of the present utility model will be set forth in part in the description, partly by from following description
In become obvious, or by it is of the present utility model practice recognize.
Brief description of the drawings
Of the present utility model above-mentioned and/or additional aspect and advantage will from description of the accompanying drawings below to embodiment is combined
Become substantially and be readily appreciated that, wherein：
During Fig. 1 is prior art one embodiment, the circuit diagram of relay drive circuit.
Fig. 2 is the circuit diagram for the relay coil drive circuit controlled based on PWM ripples that the utility model is provided.
Fig. 3 is the PWM ripple schematic diagrames for the microprocessor module output that the utility model is provided.
Reference
Microprocessor module 1；Drive module 2；Switch element 3；Power supply 6；Current acquisition module 7.
Embodiment
Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element or element with same or like function are represented to same or similar label eventually.Below by ginseng
The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
In description of the present utility model, it is to be understood that term " length ", " width ", " thickness ", " on ", " under ",
The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than indicate
Or imply that the device or element of meaning must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that
For to limitation of the present utility model.In addition, term " first ", " second " be only used for describe purpose, and it is not intended that indicate or
Imply relative importance or the implicit quantity for indicating indicated technical characteristic.Thus, " first ", the spy of " second " are defined
One or more this feature can be expressed or implicitly include by levying.In description of the present utility model, " multiples' " contains
Justice is two or more, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood as the case may be
Concrete meaning in the utility model.
1 to Fig. 3 relay coil controlled based on PWM ripples that illustratively the utility model is provided is driven below in conjunction with the accompanying drawings
Dynamic circuit.
As shown in Fig. 2 the relay coil drive circuit controlled based on PWM ripples that the utility model is provided, including：
The major loop that power supply 6, switch element 3 and relay coil are composed in series；
Sustained diode 1, the switch element is connected on after the sustained diode 1 is in parallel with the relay coil
Between 3 and the power supply 6；
Drive module 2, the drive module 2 is connected between the both positive and negative polarity of the power supply 6；The drive module 2 is used for
The control signal that microprocessor module 1 is exported is received, and controls the break-make of the switch element 3；
Current acquisition module 7, the current acquisition module 7 is connected in the major loop, and the current acquisition module 7 is used
In the electric current gathered in major loop and current signal is inputted to microprocessor module 1；
Microprocessor module 1, the microprocessor module 1 includes signal input A/D and signal output I/O, described
Signal input A/D is connected with the current acquisition module 7, and the signal output I/O is connected with the drive module 2；Institute
Stating signal input A/D is used to receive the current signal that the transmission of current acquisition module 7 comes, and the signal output I/O is used
The drive module 2 is given in output control signal；The microprocessor module 1 controls the signal defeated according to the current signal
Export the PWM ripple dutycycles of the control signal of I/O outputs.
In the utility model, by the electric current in current acquisition module 7 in real time collection major loop, calculate flow through in real time
The current value of relay coil；And by relevant set of information on microprocessor module 1, microprocessor module 1 is according to electric current
Size, constantly regulate PWM ripple dutycycles so that the maintenance electric current phase of the average current of relay coil and relay coil
Match somebody with somebody so that energy consumption during relay KM1 steady operations can be preferably minimized, while it also avoid the heating of relay coil.
As shown in Fig. 2 the switch element 3 is metal-oxide-semiconductor V1, the drain electrode of the metal-oxide-semiconductor V1 and one end of relay coil
Connection, the grid of the metal-oxide-semiconductor V1 is connected with the drive module 2, and the source electrode of the metal-oxide-semiconductor V1 is connected with the positive pole of power supply 6.
Further, it is in series with the 4th resistance R4 between above-mentioned metal-oxide-semiconductor V1 grid and the negative pole of the power supply 6.
As shown in Fig. 2 the negative electrode of sustained diode 1 is connected with one end of the relay coil, the fly-wheel diode
D1 anode is connected with the other end of the relay coil, and the other end of the relay coil is electrically connected to the power supply 6
Negative pole.
In some embodiments, the current acquisition module 7 include being connected on the other end of the relay coil with it is described
The 5th resistance R5 between the negative pole of power supply 6, is provided between the 5th resistance R5 and the other end of the relay coil
First node J1, the first node J1 are electrically connected with the signal input A/D of the microprocessor module 1.
Above-mentioned current acquisition module 7 includes filter circuit, and the filter circuit includes the 6th resistance R6 and filter capacitor C1,
One end of the 6th resistance R6 is connected with the signal input A/D, and the other end is connected with the first node J1；The filter
Ripple electric capacity C1 one end is connected with one end of the 6th resistance R6, the other end ground connection of the filter capacitor C1.Microprocessor
After the signal input A/D of module 1, the current signal sampled via the 5th resistance R5, RC filtering process, the 6th resistance R6 are carried out
After being connected with filter capacitor C1, signal input A/D is sent into.
Above-mentioned drive module 2 includes first resistor R1, second resistance R2,3rd resistor R3, the first triode Q1, the two or three
Pole pipe Q2 and the 3rd triode Q3, one end of the first resistor R1 is connected with the signal output I/O, the first resistor
The R1 other end is connected with the base stage of the first triode Q1；One end of the second resistance R2 and the first triode Q1 base
Extremely it is connected, the other end of the second resistance R2 is connected with the negative pole of power supply 6；The emitter stage and power supply of the first triode Q1
6 negative pole is connected, and the colelctor electrode of the first triode Q1 is connected with one end of the 3rd resistor R3；The 3rd resistor R3
The other end be connected with the positive pole of the power supply 6；The second triode Q2 and the 3rd triode Q3 base stage are with described
Three resistance R3 one end is connected, and the colelctor electrode of the second triode Q2 is connected with the positive pole of the power supply 6, the two or three pole
Pipe Q2 emitter stage and the 3rd triode Q3 emitter stage are connected with the switch element 3, the 3rd triode Q3's
Colelctor electrode is connected to the negative pole of power supply 6.
The signal output I/O connections drive module 2 of microprocessor module 1, by after first resistor R1 with second resistance
R2, the first triode Q1, after making control signal reverse, then the power amplifier electricity constituted via the second triode Q2, the 3rd triode Q3
Lu Hou, driving metal-oxide-semiconductor V1.
The second triode Q2 is NPN type triode, and the 3rd triode Q3 is PNP type triode.
One end of the 4th resistance R4 is connected with metal-oxide-semiconductor V1 grid, the other end and the power supply 6 of the 4th resistance R4
Negative pole connection, the grid of the metal-oxide-semiconductor V1 is connected with the second triode Q2 emitter stage.
In the utility model, microprocessor module 1 calculates flow through relay in real time by the 5th resistance R5 of collection electric current
The current value of device coil, when voltage pulsation or the rise with temperature, the resistance value of relay coil increases, microprocessor module
1 passes through constantly regulate PWM ripple dutycycles so that relay coil average current and relay KM1 maintain electric current to match, make after
The energy consumption of electrical equipment KM1 steady operations is preferably minimized.
In the utility model, microprocessor module 1 is the microprocessor comprising CPU, digital signal processor
Or the circuit module of programmable controller.
As shown in figure 3, performing PWM controls for the specific embodiment drive circuit as shown in Figure 2 that the utility model is provided
Time diagram, specifically, waveform one is the ON OFF state that PWM controls metal-oxide-semiconductor V1, when PWM wave height level, i.e. 0-t1
Moment, metal-oxide-semiconductor V1 conductings, relay coil electric current IL increases as time goes by, now the electric current on the 5th resistance R5
IR5 variation tendencies are consistent with electric current IL；When PWM ripple low levels, i.e. t1 ~ t2 moment, sample rate current IR5 is cut due to metal-oxide-semiconductor V1
Only and moment is 0, IL electric currents release energy by sustained diode 1 in relay coil, and IL reduces as time goes by,
In whole complete cycle T, the IL initial values and final value of coil current are equal, and it is average inductor current to make IAVG, then IAVG=VCC/
RKM1；It is assumed that D is PWM pulse duty cycles, D=ton/ (ton+toff), then IR5=VCC/RKM1*D;The letter of microprocessor module 1
The change for the IR5 that number input port A/D is collected by signal acquisition module（After the voltage pulsation of power supply 6 or temperature rise, coil electricity
Resistance temperature coefficient causes RKM1 to change）, corresponding PWM ripples dutycycle D is sent via signal output I/O, makes relay coil
Average current IAVG and relay KM1 maintains electric current IR to match, and is preferably minimized the energy consumption of relay KM1 steady operations.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present utility model or example.In this manual, to the schematic table of above-mentioned term
State and be not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be
Combined in an appropriate manner in any one or more embodiments or example.
Although embodiment of the present utility model has been shown and described above, it is to be understood that above-described embodiment is
Exemplary, it is impossible to it is interpreted as to limitation of the present utility model, one of ordinary skill in the art is not departing from the utility model
Principle and objective in the case of above-described embodiment can be changed in the range of the utility model, change, replace and
Modification.
Claims (9)
1. a kind of relay coil drive circuit controlled based on PWM ripples, it is characterised in that including：
The major loop that power supply, switch element and relay coil are composed in series；
Fly-wheel diode, the switch element and the electricity are connected on after the fly-wheel diode is in parallel with the relay coil
Between source；
Drive module, the drive module is connected between the both positive and negative polarity of the power supply；The drive module is used to receive micro- place
The control signal of device module output is managed, and controls the break-make of the switch element；
Current acquisition module, the current acquisition block coupled in series is in the major loop, and the current acquisition module is used to gather
Electric current in major loop simultaneously inputs current signal to microprocessor module；
Microprocessor module, the microprocessor module include signal input and signal output, the signal input with
The current acquisition module connection, the signal output is connected with the drive module；The signal input is used to receive
The current signal that the current acquisition module transmission comes, the signal output is used for output control signal to the driving mould
Block；The microprocessor module controls the PWM ripples of the control signal of the signal output output to account for according to the current signal
Sky ratio.
2. the relay coil drive circuit according to claim 1 controlled based on PWM ripples, it is characterised in that described to open
Pass element is metal-oxide-semiconductor, and the drain electrode of the metal-oxide-semiconductor and one end of relay coil are connected, the grid of the metal-oxide-semiconductor and the driving
Module is connected, and the source electrode of the metal-oxide-semiconductor is connected with the positive pole of power supply.
3. the relay coil drive circuit according to claim 2 controlled based on PWM ripples, it is characterised in that the MOS
The 4th resistance is in series between the negative pole of the grid of pipe and the power supply.
4. the relay coil drive circuit according to claim 2 controlled based on PWM ripples, it is characterised in that described continuous
The negative electrode of stream diode is connected with one end of the relay coil, the anode of the fly-wheel diode and the relay coil
Other end connection, the other end of the relay coil is electrically connected to the negative pole of the power supply.
5. the relay coil drive circuit according to claim 4 controlled based on PWM ripples, it is characterised in that the electricity
Stream acquisition module includes the 5th resistance being connected between the negative pole of the other end of the relay coil and the power supply, described
First node, the first node and the microprocessor are provided between 5th resistance and the other end of the relay coil
The signal input electrical connection of module.
6. the relay coil drive circuit according to claim 5 controlled based on PWM ripples, it is characterised in that the electricity
Flowing acquisition module includes filter circuit, and the filter circuit includes the 6th resistance and filter capacitor, one end of the 6th resistance
It is connected with the signal input, the other end is connected with the first node；One end of the filter capacitor and the described 6th electricity
One end connection of resistance, the other end ground connection of the filter capacitor.
7. the relay coil drive circuit according to claim 1 controlled based on PWM ripples, it is characterised in that the drive
Dynamic model block includes first resistor, second resistance, 3rd resistor, the first triode, the second triode and the 3rd triode, described the
One end of one resistance is connected with the signal output, the base stage phase of the other end of the first resistor and first triode
Even；One end of the second resistance is connected with the base stage of the first triode, the other end of the second resistance and the negative pole of power supply
It is connected；The emitter stage of first triode is connected with the negative pole of power supply, the colelctor electrode of first triode and the described 3rd
One end of resistance is connected；The other end of the 3rd resistor is connected with the positive pole of the power supply；Second triode and the 3rd
The one end of the base stage of triode with the 3rd resistor is connected, the colelctor electrode of second triode and the positive pole of the power supply
Connection, the emitter stage of the emitter stage of second triode and the 3rd triode is connected with the switch element, and described the
The colelctor electrode of three triodes is connected to the negative pole of power supply.
8. the relay coil drive circuit according to claim 7 controlled based on PWM ripples, it is characterised in that described the
Two triodes are NPN type triode, and the 3rd triode is PNP type triode.
9. the relay coil drive circuit according to claim 3 controlled based on PWM ripples, it is characterised in that described the
One end of four resistance and the grid of metal-oxide-semiconductor are connected, and the other end of the 4th resistance and the negative pole of power supply are connected, the metal-oxide-semiconductor
Grid be connected with the emitter stage of the second triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621419303.8U CN206421994U (en) | 2016-12-22 | 2016-12-22 | A kind of relay coil drive circuit controlled based on PWM ripples |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621419303.8U CN206421994U (en) | 2016-12-22 | 2016-12-22 | A kind of relay coil drive circuit controlled based on PWM ripples |
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| Publication Number | Publication Date |
|---|---|
| CN206421994U true CN206421994U (en) | 2017-08-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621419303.8U Expired - Fee Related CN206421994U (en) | 2016-12-22 | 2016-12-22 | A kind of relay coil drive circuit controlled based on PWM ripples |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108630493A (en) * | 2018-07-05 | 2018-10-09 | 蔚来汽车有限公司 | Drive the method and electromagnetic relay driving device, charging pile of electromagnetic relay |
| WO2019196523A1 (en) * | 2018-04-12 | 2019-10-17 | 深圳南云微电子有限公司 | Auxiliary power supply circuit and contactor applying same |
| CN111061327A (en) * | 2019-12-12 | 2020-04-24 | 联合汽车电子有限公司 | Closed-loop control system and closed-loop control method of driving circuit |
| CN113192792A (en) * | 2021-04-12 | 2021-07-30 | 厦门芯阳科技股份有限公司 | Improved method for driving on-off of relay |
-
2016
- 2016-12-22 CN CN201621419303.8U patent/CN206421994U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019196523A1 (en) * | 2018-04-12 | 2019-10-17 | 深圳南云微电子有限公司 | Auxiliary power supply circuit and contactor applying same |
| CN108630493A (en) * | 2018-07-05 | 2018-10-09 | 蔚来汽车有限公司 | Drive the method and electromagnetic relay driving device, charging pile of electromagnetic relay |
| CN111061327A (en) * | 2019-12-12 | 2020-04-24 | 联合汽车电子有限公司 | Closed-loop control system and closed-loop control method of driving circuit |
| CN113192792A (en) * | 2021-04-12 | 2021-07-30 | 厦门芯阳科技股份有限公司 | Improved method for driving on-off of relay |
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