CN109036962B - Energy-saving driving circuit for relay coil - Google Patents
Energy-saving driving circuit for relay coil Download PDFInfo
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- CN109036962B CN109036962B CN201811168923.2A CN201811168923A CN109036962B CN 109036962 B CN109036962 B CN 109036962B CN 201811168923 A CN201811168923 A CN 201811168923A CN 109036962 B CN109036962 B CN 109036962B
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- relay coil
- voltage stabilizing
- capacitor
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 53
- 238000001914 filtration Methods 0.000 claims abstract description 39
- 238000005070 sampling Methods 0.000 claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims description 59
- 230000005669 field effect Effects 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 239000004065 semiconductor Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000000670 limiting effect Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 description 1
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
- H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
- H01H2047/025—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay with taking into account of the thermal influences, e.g. change in resistivity of the coil or being adapted to high temperatures
Abstract
The invention discloses a relay coil energy-saving driving circuit, which is arranged on a printed circuit board, wherein the printed circuit board is connected between a power supply device and a relay coil, and comprises: the input end of the filtering module is respectively connected with the first output end and the second output end of the power supply device; the voltage stabilizing module comprises a voltage stabilizing circuit and a sampling circuit; the driving module comprises a micro-processing chip, a first pin of the micro-processing chip is connected with the output end of the voltage stabilizing circuit, and a third pin of the micro-processing chip is connected with the output end of the sampling circuit; and a relay coil is connected between the output end of the driving module and the second output end of the filtering module. The beneficial effects are that: electromagnetic compatibility is met, the anti-interference capability of an external power grid to the whole relay can be improved, and the driving circuit can absorb harmonic voltage generated by pulse width modulation, so that the relay coil is further prevented from being burnt out due to long-time heating, and the service life of the relay coil is longer.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to an energy-saving driving circuit for a relay coil.
Background
The coil of the relay is a main component of the relay, and the current passing through the coil is very small, and the current or voltage controlled by the head is relatively high, so that the purpose of controlling the large current and the high voltage by small current or small voltage is realized.
If the coil of the high-power relay works under 12VDC for a long time, the coil is burnt out due to over-high heat after the coil is electrified for a long time, and the service life of the relay is further shortened.
Disclosure of Invention
Aiming at the problems in the prior art, the energy-saving driving circuit of the relay coil is provided.
The specific technical scheme is as follows:
an energy-conserving drive circuit of relay coil sets up on printed circuit board, printed circuit board connects between a power supply unit and a relay coil, wherein, drive circuit includes:
the input end of the filtering module is respectively connected with the first output end and the second output end of the power supply device, and the filtering module is used for filtering ripple waves of the output voltage of the power supply device;
the voltage stabilizing module comprises a voltage stabilizing circuit and a sampling circuit;
the input end of the voltage stabilizing circuit is connected to the first output end of the filtering module through a first diode, and the voltage stabilizing circuit is used for providing a stable power supply to a driving module;
the input end of the sampling circuit is connected to the first output end of the filtering module through the first diode, and the sampling circuit is used for sampling external voltage and transmitting the external voltage to the driving module;
the driving module comprises a micro-processing chip, a first pin of the micro-processing chip is connected with the output end of the voltage stabilizing circuit, a third pin of the micro-processing chip is connected with the output end of the sampling circuit, and the driving module provides driving voltage for the relay coil;
and the relay coil is connected between the output end of the driving module and the second output end of the filtering module.
Preferably, the filtering module includes:
the first end and the second end of the filter inductor are respectively connected between the first output end and the second output end of the power supply device, and the third end and the fourth end of the filter inductor are respectively connected between the output end and the grounding end of the filter module;
the piezoresistor is connected between the first end and the second end of the filter inductor;
the first capacitor is connected between the first end and the second end of the filter inductor;
the second capacitor is connected between the first end and the second end of the filter inductor;
the third capacitor is connected between the first end and the second end of the filter inductor;
a fourth capacitor connected between the third terminal and the fourth terminal of the filter inductor;
a fifth capacitor connected between the third terminal and the fourth terminal of the filter inductor;
and a sixth capacitor connected between the third terminal and the fourth terminal of the filter inductor.
Preferably, the voltage stabilizing circuit includes:
the source electrode of the first switching tube is connected to the first output end of the filtering module through the first diode, and the grid electrode of the first switching tube is connected with the first pin of the micro-processing chip;
the first pin and the second pin of the voltage stabilizing chip are connected to the first pin of the micro-processing chip, the fifth pin of the voltage stabilizing chip is connected to the drain electrode of the first switch tube, and the fifth pin of the voltage stabilizing chip is respectively connected with the sixth pin, the seventh pin and the eighth pin;
the seventh capacitor is connected between the first pin of the voltage stabilizing chip and the grounding end through a first resistor;
the eighth capacitor is connected between the first pin of the voltage stabilizing chip and the grounding end;
the ninth capacitor is connected between the fifth pin of the voltage stabilizing chip and the grounding end;
and the tenth capacitor is connected between the fifth pin of the voltage stabilizing chip and the grounding end.
Preferably, the sampling circuit includes:
the second resistor is connected between the first output end of the filtering module and the third pin of the micro-processing chip through the first diode;
the second diode is connected between the third pin of the micro-processing chip and the grounding end;
an eleventh capacitor connected between the third pin of the micro-processing chip and the ground terminal;
and the third resistor is connected between the third pin of the micro-processing chip and the grounding end.
Preferably, the driving circuit includes:
the grid electrode of the second switching tube is connected to the fifth pin of the micro-processing chip through a fourth resistor, and the source electrode of the second switching tube is connected to the grounding end;
the source electrode of the third switching tube is connected to the drain electrode of the second switching tube, the grid electrode of the third switching tube is connected to the source electrode of the third switching tube through a fifth resistor, and the drain electrode of the third switching tube is connected to the second input end of the relay coil;
the third diode is connected between the second output end of the filtering module and the first input end of the relay coil;
a fourth diode connected between the source of the second switching tube and the first input end of the relay coil;
the fifth diode is connected between the first input end of the relay coil and the grid electrode of the second switching tube through a sixth resistor;
a sixth diode connected between the gate and the source of the second switch tube;
a twelfth capacitor connected between the gate and the source of the second switch tube;
a thirteenth capacitor connected between the second output end of the filtering module and the ground end;
and a fourteenth capacitor connected between the first input end of the relay coil and the ground end.
Preferably, the eighth pin of the micro-processing chip, and the third pin and the fourth pin of the voltage stabilizing chip are connected to a ground terminal.
Preferably, the first switching tube, the second switching tube and the third switching tube are all N-channel metal oxide semiconductor field effect transistors.
Preferably, the second diode and the sixth diode are both zener diodes.
The technical scheme of the invention has the beneficial effects that: the adoption of the capacitors is connected in parallel to meet electromagnetic compatibility, the voltage dividing circuit is adopted, the driving circuit provides stable voltage for the relay coil, the sampling circuit is adopted, the anti-interference capability of an external power grid to the whole relay can be improved, the driving circuit can absorb harmonic voltage generated by pulse width modulation, the relay coil is further prevented from being burnt out due to long-time heating, and the service life of the relay coil is longer.
Drawings
Embodiments of the present invention will now be described more fully with reference to the accompanying drawings. The drawings, however, are for illustration and description only and are not intended as a definition of the limits of the invention.
FIG. 1 is a circuit diagram of a drive circuit for relay coil energy conservation in the present invention;
FIG. 2 is a graph showing waveforms of outputs of the relay coil at voltages of 8.0-12.5V according to the present invention;
fig. 3 is a graph of the output waveform of the present invention for a voltage of 12.6-36.0V supplied to the relay coil.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
The invention comprises a relay coil energy-saving driving circuit 1 which is arranged on a printed circuit board, wherein the printed circuit board is connected between a power supply device 2 and a relay coil 3, and the driving circuit 1 comprises:
the input end of the filtering module 10 is respectively connected with the first output end 20 and the second output end 21 of the power supply device 2, and the filtering module 10 is used for filtering ripple waves of the output voltage of the power supply device 2;
the voltage stabilizing module 11, the voltage stabilizing module 11 comprises a voltage stabilizing circuit 110 and a sampling circuit 111;
the input end of the voltage stabilizing circuit 110 is connected to the first output end 100 of the filtering module 10 through a first diode D1, and the voltage stabilizing circuit 110 is used for providing stable power supply to a driving module 12;
the input end of the sampling circuit 111 is connected to the first output end 100 of the filtering module 10 through the first diode D1, and the sampling circuit 111 is used for sampling external voltage and transmitting the external voltage to the driving module 12;
the driving module 12 comprises a micro-processing chip U1, a first pin U10 of the micro-processing chip U1 is connected with the output end of the voltage stabilizing circuit 110, a third pin U12 of the micro-processing chip U1 is connected with the output end of the sampling circuit 111, and the driving module 12 provides driving voltage for the relay coil 3;
the relay coil 3 is connected between the output of the drive module 12 and the second output 101 of the filter module 10.
According to the technical scheme of the relay coil energy-saving driving circuit, as shown in fig. 1, a driving circuit 1 is connected between a power supply device 2 and a relay coil 3, the power supply device 2 is connected with a voltage input end of an external power grid, ripple waves of output voltage of the power supply device 2 are filtered through a filtering module 10 in the driving circuit 1 to be divided, a first part flows into a voltage stabilizing module 11, a second part flows into the relay coil 3, at the moment, the voltage is divided until about 2-3V through the action of a second switching tube Q2 in the driving circuit 1 in a pulse waveform mode, so that the temperature flowing through the relay coil 3 is reduced, and the relay coil 3 can work normally;
further, the voltage stabilizing circuit 110 provides a stable voltage of 5 volts for the driving module 12, and the sampling circuit 111 in the voltage stabilizing module 11 samples an external input voltage for the driving module, and changes with the external input;
further, the micro-processing chip U1 performs pulse modulation, the sampling circuit 111 samples the external voltage to be input to the micro-processing chip U1, and the voltage of the micro-processing chip U1 changes along with the voltage change sampled by the sampling circuit, when the voltage supplied to the relay coil 3 is 8.0-12.5V, the output pulse modulation waveform is as shown in fig. 2, when the voltage supplied to the relay coil 3 is 12.6-36.0V, the output pulse modulation waveform is as shown in fig. 3, firstly, 100ms pull-in voltage is supplied to the relay coil 3, and the higher the voltage is, the larger the duty ratio is, meanwhile, the function of the second switching tube Q2 plays a role of saving energy for the relay coil, and provides driving voltage for the relay coil 3, so that the anti-interference capability of the external power grid to the whole relay coil 3 can be further improved.
In a preferred embodiment, the filtering module 10 comprises:
the first input end L01 and the second input end L02 of the filter inductor L are respectively connected between the first output end 20 and the second output end 21 of the power supply device 2, and the first output end L11 and the second output end L12 of the filter inductor L are respectively connected between the output end of the filter module 10 and the ground end GND;
the piezoresistor Z is connected between a first input end L01 and a second input end L02 of the filter inductor L;
the first capacitor C1 is connected between the first input terminal L01 and the second input terminal L02 of the filter inductor L;
the second capacitor C2 is connected between the first input terminal L01 and the second input terminal L02 of the filter inductor L;
a third capacitor C3 connected between the first input terminal L01 and the second input terminal L02 of the filter inductor L;
a fourth capacitor C4 connected between the first output terminal L11 and the second output terminal L12 of the filter inductor L;
a fifth capacitor C5 connected between the first output terminal L11 and the second output terminal L12 of the filter inductor L;
a sixth capacitor C6 connected between the first output terminal L11 and the second output terminal L12 of the filter inductor L.
Specifically, in the filtering module 10, a filtering inductor L with four ports is adopted, the magnetic core material is manganese zinc ferrite, a first capacitor C1, a second capacitor C2 and a third capacitor C3 between two input ends, a fourth capacitor C4, a fifth capacitor C5 and a sixth capacitor C6 between two output ends are matched with the filtering inductor L for use, both the positive and negative poles of the filtering inductor L can play a role in filtering, and meanwhile, six capacitors are adopted for mainly solving the problem of electromagnetic compatibility, and can simultaneously meet the automobile standard GB18655, and also play a role in preventing mutual interference between an external power grid and the relay coil 3;
furthermore, the piezoresistor Z is mainly used for inhibiting surge current and lightning overvoltage, and when the voltage of an external power grid is instantaneously higher than the protection voltage of the piezoresistor Z, the piezoresistor Z is instantaneously conducted and short-circuited, so that a circuit at the back is further protected, and the circuit at the back is prevented from being damaged due to the fact that the voltage is excessively high.
In a preferred embodiment, the voltage stabilizing circuit 110 includes:
the source electrode of the first switching tube Q1 is connected to the first output end 100 of the filter module 10 through a first diode D1, and the grid electrode of the first switching tube Q1 is connected with the first pin U10 of the micro-processing chip U1;
the first pin U20 and the second pin U21 of the voltage stabilizing chip U2 are connected to the first pin U10 of the micro-processing chip U1, the fifth pin U24 of the voltage stabilizing chip U2 is connected to the drain electrode of the first switching tube Q1, and the fifth pin U24 of the voltage stabilizing chip U2 is respectively connected with the sixth pin U25, the seventh pin U26 and the eighth pin U27;
a seventh capacitor C7 connected between the first pin U20 of the voltage stabilizing chip U2 and the ground GND through a first resistor R1;
an eighth capacitor C8 connected between the first pin U20 of the voltage stabilizing chip U2 and the ground GND;
a ninth capacitor C9 connected between the fifth pin U24 of the voltage stabilizing chip U2 and the ground GND;
a tenth capacitor C10 connected between the fifth pin U24 of the voltage stabilizing chip U2 and the ground GND.
Specifically, the first switching tube Q1 is an N-channel mosfet, when the filtering module 10 performs voltage division, the first switching tube Q1 is turned on, and the decoupling circuit composed of the ninth capacitor C9 and the tenth capacitor C10 is mainly used for ensuring that the voltage stabilizing circuit 110 has a reliable and stable voltage and preventing the power supply from being easily disturbed through the current limiting of the first resistor R1, the filtering of the seventh capacitor C7 and the filtering of the eighth capacitor through the voltage stabilizing chip U2.
In a preferred embodiment, the sampling circuit 111 comprises:
the second resistor R2 is connected between the first output end 100 of the filter module 10 and the third pin U12 of the micro-processing chip U1 through the first diode D1;
the second diode D2 is connected between the third pin U12 of the micro-processing chip U1 and the ground end GND;
an eleventh capacitor C11 connected between the third pin U12 of the microprocessor U1 and the ground GND;
the third resistor R3 is connected between the third pin U12 of the microprocessor U1 and the ground GND.
Specifically, the sampling circuit 111 is formed by connecting the second diode D2, the eleventh capacitor C11 and the third resistor R3 in parallel and then connecting the second resistor R2, and has a main function of increasing the voltage input to the micro-processing chip U1 when the external voltage becomes high, decreasing the sampling voltage input to the micro-processing chip U1 when the external voltage becomes low, and further changing the voltage input to the third pin U12 of the micro-processing chip U1 along with the external voltage change, thereby playing a role of sampling.
In a preferred embodiment, the driving circuit 12 comprises:
the grid electrode of the second switching tube Q2 is connected to the fifth pin U14 of the micro-processing chip U1 through a fourth resistor R4, and the source electrode of the second switching tube Q2 is connected to the ground end GND;
the source electrode of the third switching tube Q3 is connected to the drain electrode of the second switching tube Q2, the grid electrode of the third switching tube Q3 is connected to the source electrode of the third switching tube Q3 through a fifth resistor R5, and the drain electrode of the third switching tube Q3 is connected to the second input end 31 of the relay coil 3;
a third diode D3 connected between the second output terminal 101 of the filter module 10 and the first input terminal 30 of the relay coil 3;
a fourth diode D4 connected between the source of the second switching tube Q2 and the first input terminal 30 of the relay coil 3;
a fifth diode D5 connected between the first input terminal 30 of the relay coil 3 and the gate of the second switching tube Q2 through a sixth resistor R6;
a sixth diode D6 connected between the gate and the source of the second switching tube Q2;
a twelfth capacitor C12 connected between the gate and the source of the second switching tube Q2;
a thirteenth capacitor C13 connected between the second output terminal 100 of the filter module 10 and the ground GND;
a fourteenth capacitor C14 is connected between the first input terminal 30 of the relay coil 3 and the ground GND.
Specifically, in the driving module 12, a voltage stabilizing protection circuit is formed by connecting a sixth diode D6, a twelfth capacitor C12 and a fifth resistor R5 in parallel and then connecting the fifth diode D6, the twelfth capacitor C12 and the fifth resistor R5 in series, so as to provide a stable voltage for the gate of the third switching tube Q3, and keep on all the time;
meanwhile, the fourth diode D4 and the third switching tube Q3 are formed to have the function of absorbing reaction force generated when the relay coil 3 works, so that the relay coil 3 is protected, and a stable working state conversion function is facilitated;
further, the fifth pin U14 of the microprocessor U1 outputs a pulse waveform, and reaches the gate of the second switching tube Q2 under the current limiting effect of the fourth resistor R4, when the gate of the second switching tube Q2 has a high potential, the second switching tube Q2 is turned on, and current flows into the relay coil 3 through the third switching tube Q3; the main function of the second switching tube Q2 is to control the conduction and switching state of the relay coil 3, further provide the voltage kept, play a role in energy conservation;
the decoupling circuit consisting of the thirteenth capacitor C13 and the fourteenth capacitor C14 is mainly used for ensuring that the driving module 12 has a reliable and stable voltage and preventing the power supply from being easily disturbed.
In a preferred embodiment, the eighth pin U17 of the micro-processing chip U1 and the third pin U22 and the fourth pin U23 of the voltage stabilizing chip U2 are connected to the ground GND.
In a preferred embodiment, the first switching transistor Q1, the second switching transistor Q2 and the third switching transistor Q3 are N-channel mosfets.
In a preferred embodiment, the second diode D2 and the sixth diode D6 are zener diodes.
It should be noted that, the model of the micro-processing chip U1 is PIC12F688, the model of the voltage stabilizing chip U2 is MIC5200-5.0BM, which are all applied in the technical field and are not described herein.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.
Claims (7)
1. An energy-conserving drive circuit of relay coil sets up on printed circuit board, printed circuit board connects between a power supply unit and a relay coil, its characterized in that, drive circuit includes:
the input end of the filtering module is respectively connected with the first output end and the second output end of the power supply device, and the filtering module is used for filtering ripple waves of the output voltage of the power supply device;
the voltage stabilizing module comprises a voltage stabilizing circuit and a sampling circuit;
the input end of the voltage stabilizing circuit is connected to the first output end of the filtering module through a first diode, and the voltage stabilizing circuit is used for providing stable 5-volt power supply voltage to a driving module;
the input end of the sampling circuit is connected to the first output end of the filtering module through the first diode, and the sampling circuit is used for sampling external voltage and transmitting the external voltage to the driving module;
the driving module comprises a micro-processing chip, a first pin of the micro-processing chip is connected with the output end of the voltage stabilizing circuit, a third pin of the micro-processing chip is connected with the output end of the sampling circuit, and the driving module provides driving voltage for the relay coil;
the relay coil is connected between the output end of the driving module and the second output end of the filtering module;
the voltage stabilizing circuit includes:
the source electrode of the first switching tube is connected to the first output end of the filtering module through the first diode, and the grid electrode of the first switching tube is connected with the first pin of the micro-processing chip;
the first pin and the second pin of the voltage stabilizing chip are connected to the first pin of the micro-processing chip, the fifth pin of the voltage stabilizing chip is connected to the drain electrode of the first switch tube, and the fifth pin of the voltage stabilizing chip is respectively connected with the sixth pin, the seventh pin and the eighth pin;
the seventh capacitor is connected between the first pin of the voltage stabilizing chip and the grounding end through a first resistor;
the eighth capacitor is connected between the first pin of the voltage stabilizing chip and the grounding end;
the ninth capacitor is connected between the fifth pin of the voltage stabilizing chip and the grounding end;
and the tenth capacitor is connected between the fifth pin of the voltage stabilizing chip and the grounding end.
2. The drive circuit of claim 1, wherein the filtering module comprises:
the first end and the second end of the filter inductor are respectively connected between the first output end and the second output end of the power supply device, and the third end and the fourth end of the filter inductor are respectively connected between the output end and the grounding end of the filter module;
the piezoresistor is connected between the first end and the second end of the filter inductor;
the first capacitor is connected between the first end and the second end of the filter inductor;
the second capacitor is connected between the first end and the second end of the filter inductor;
the third capacitor is connected between the first end and the second end of the filter inductor;
a fourth capacitor connected between the third terminal and the fourth terminal of the filter inductor;
a fifth capacitor connected between the third terminal and the fourth terminal of the filter inductor;
and a sixth capacitor connected between the third terminal and the fourth terminal of the filter inductor.
3. The drive circuit according to claim 1, wherein the sampling circuit includes:
the second resistor is connected between the first output end of the filtering module and the third pin of the micro-processing chip through the first diode;
the second diode is connected between the third pin of the micro-processing chip and the grounding end;
an eleventh capacitor connected between the third pin of the micro-processing chip and the ground terminal;
and the third resistor is connected between the third pin of the micro-processing chip and the grounding end.
4. A driving circuit according to claim 3, wherein the driving circuit comprises:
the grid electrode of the second switching tube is connected to the fifth pin of the micro-processing chip through a fourth resistor, and the source electrode of the second switching tube is connected to the grounding end;
the source electrode of the third switching tube is connected to the drain electrode of the second switching tube, the grid electrode of the third switching tube is connected to the source electrode of the third switching tube through a fifth resistor, and the drain electrode of the third switching tube is connected to the second input end of the relay coil;
the third diode is connected between the second output end of the filtering module and the first input end of the relay coil;
a fourth diode connected between the source of the second switching tube and the first input end of the relay coil;
the fifth diode is connected between the first input end of the relay coil and the grid electrode of the second switching tube through a sixth resistor;
a sixth diode connected between the gate and the source of the second switch tube;
a twelfth capacitor connected between the gate and the source of the second switch tube;
a thirteenth capacitor connected between the second output end of the filtering module and the ground end;
and a fourteenth capacitor connected between the first input end of the relay coil and the ground end.
5. The driving circuit according to claim 1, wherein the eighth pin of the micro-processing chip and the third pin and the fourth pin of the voltage stabilizing chip are both connected to a ground terminal.
6. The driving circuit of claim 1, wherein the first switching transistor, the second switching transistor, and the third switching transistor are all N-channel metal oxide semiconductor field effect transistors.
7. The driving circuit of claim 4, wherein the second diode and the sixth diode are zener diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811168923.2A CN109036962B (en) | 2018-10-08 | 2018-10-08 | Energy-saving driving circuit for relay coil |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811168923.2A CN109036962B (en) | 2018-10-08 | 2018-10-08 | Energy-saving driving circuit for relay coil |
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| CN109036962A CN109036962A (en) | 2018-12-18 |
| CN109036962B true CN109036962B (en) | 2024-02-09 |
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| CN201811168923.2A Active CN109036962B (en) | 2018-10-08 | 2018-10-08 | Energy-saving driving circuit for relay coil |
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| CN206210702U (en) * | 2016-11-26 | 2017-05-31 | 中国电子科技集团公司第四十研究所 | A kind of energy-saving controller of HVDC relay |
| CN207652717U (en) * | 2017-12-20 | 2018-07-24 | 厦门著赫电子科技有限公司 | A kind of electromagnetic coil driving circuit |
| CN209266312U (en) * | 2018-10-08 | 2019-08-16 | 上海西艾爱电子有限公司 | A kind of energy-efficient driving circuit of relay coil |
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|---|---|
| CN109036962A (en) | 2018-12-18 |
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