CN220985906U - Power supply system for motor car maintenance lamp - Google Patents
Power supply system for motor car maintenance lamp Download PDFInfo
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- CN220985906U CN220985906U CN202322820533.1U CN202322820533U CN220985906U CN 220985906 U CN220985906 U CN 220985906U CN 202322820533 U CN202322820533 U CN 202322820533U CN 220985906 U CN220985906 U CN 220985906U
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- power supply
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- 238000012423 maintenance Methods 0.000 title claims abstract description 37
- 239000003381 stabilizer Substances 0.000 claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims description 38
- 238000005070 sampling Methods 0.000 claims description 15
- 230000001629 suppression Effects 0.000 claims description 10
- 238000007599 discharging Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The utility model discloses a power supply system for a motor car maintenance lamp, which comprises an alternating direct unit and a timing driving unit; the alternating direct-current unit is provided with a power supply positive electrode output end; the timing driving unit comprises a voltage stabilizer, a singlechip and an encoder; the input end of the voltage stabilizer is connected to the positive output end of the power supply through the first current limiting resistor, and the output end of the voltage stabilizer is connected to the positive pin of the power supply of the singlechip; a trigger circuit is connected between the trigger pin of the singlechip and the output end of the voltage stabilizer; the driving pin of the singlechip is connected with a driving circuit. According to the utility model, the maintenance time length can be set through the setting of the encoder, after the trigger switch is pressed, the singlechip can output a high level with corresponding time length to conduct the driving circuit to supply power to the maintenance lamp, and after the timing of the maintenance time length is finished, the singlechip can automatically output a low level to stop the driving circuit to extinguish the maintenance lamp, so that the maintenance lamp has the advantages of stable operation, long service life and good safety.
Description
Technical Field
The utility model relates to the technical field of lamp power supply, in particular to a power supply system for a motor car maintenance lamp.
Background
In order to discover and eliminate the bad running state of parts in the motor train unit in time, regular maintenance is necessary for the motor train unit, and most of maintenance lamps are needed for illumination during maintenance. Because the power supply on the motor train unit is mostly limited, the maintenance time is required to be controlled in order to avoid excessive waste of electric energy, and the switch of the maintenance lamp is mostly controlled by means of manual experience, but the time concept of operators cannot be improved, and the effects of energy conservation and consumption reduction are not achieved.
Disclosure of utility model
The utility model aims to overcome the problems in the prior art and provide a power supply system for a motor car maintenance lamp, which has the advantages of stable operation, long service life and good safety.
The aim of the utility model is mainly realized by the following technical scheme:
A power supply system for a motor car maintenance lamp comprises an alternating straight unit and a timing driving unit;
the alternating direct-current unit is provided with a power supply positive electrode output end;
The timing driving unit comprises a voltage stabilizer, a singlechip and an encoder;
The input end of the voltage stabilizer is connected to the positive output end of the power supply through the first current limiting resistor, and the output end of the voltage stabilizer is connected to the positive pin of the power supply of the singlechip;
The encoder is provided with three encoding switches, namely a first encoding switch, a second encoding switch and a third encoding switch, wherein one end pins of the first encoding switch, the second encoding switch and the third encoding switch are respectively connected with corresponding pins of the singlechip, and the other end pins of the first encoding switch, the second encoding switch and the third encoding switch are grounded;
a trigger circuit is connected between a trigger pin of the singlechip and the output end of the voltage stabilizer, and comprises a trigger switch and an anti-shake capacitor which is connected with the trigger switch in parallel and is grounded;
The driving pin of the singlechip is connected with a driving circuit.
Further, the driving circuit comprises a driving MOS tube;
The grid electrode of the driving MOS tube is connected to the driving pin of the singlechip through the second current limiting resistor, the source electrode of the driving MOS tube is grounded, and the drain electrode of the driving MOS tube is used as the output end of the driving circuit.
Further, the driving circuit further comprises a suppression resistor and a bleeder capacitor;
One end of the suppression resistor and one end of the bleeder capacitor are both connected to the grid electrode of the driving MOS tube, and the other end of the suppression resistor and the other end of the bleeder capacitor are both connected to the source electrode of the driving MOS tube.
Further, the power supply further comprises a first interface, a first pin of the first interface is connected to the positive output end of the power supply, and a second pin of the first interface is connected to the output end of the driving circuit.
Further, the trigger circuit further comprises an indication diode, wherein the anode end of the indication diode is connected to the output end of the voltage stabilizer, and the cathode end of the indication diode is grounded.
Further, the first coding switch, the second coding switch, the third coding switch and the common node of the trigger switch and the singlechip are all connected with a pull-up resistor connected to the output end of the voltage stabilizer.
Further, a grounded driving filter capacitor is connected between the input end of the voltage stabilizer, the output end of the voltage stabilizer and the power supply anode pin and the power supply cathode pin of the singlechip.
Further, the alternating direct current unit comprises a switching power supply, the switching power supply is connected with a transformer, and a secondary coil of the transformer is connected with a rectifying circuit;
The rectifying circuit comprises a rectifying diode, a power supply filter capacitor, a charging capacitor and a discharging resistor, wherein the power supply filter capacitor is connected with the rectifying diode in parallel and grounded;
The anode end of the rectifier diode is connected with the secondary coil of the transformer, and the cathode end of the rectifier diode is used as the positive output end of the power supply.
Further, the rectifying diode is also connected with a protection circuit in parallel, and the protection circuit comprises a protection resistor and a protection capacitor which are connected in series.
Further, the corresponding pins of the switching power supply are also connected with a sampling circuit, and the sampling circuit comprises a plurality of sampling resistors which are connected in parallel and grounded.
The utility model has the following beneficial effects: according to the utility model, the maintenance time length can be set through the setting of the encoder, when the trigger switch is pressed, the singlechip can output high level with corresponding time length to conduct the driving circuit to supply power to the maintenance lamp, and after the timing of the maintenance time length is finished, the singlechip can automatically output low level to stop the driving circuit to extinguish the maintenance lamp; the trigger switch may be re-timed when pressed again. Therefore, the time concept of operators can be effectively improved, and meanwhile, the continuity and consistency of the overhaul of the operators can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present utility model, the drawings that are required for describing the embodiments of the present utility model will be briefly described. It is apparent that the drawings in the following description are only some embodiments described in the present utility model, and other drawings may be obtained from the following drawings without inventive labor for those skilled in the art.
FIG. 1 is a circuit diagram of an alternating straight unit in a power supply system for an inspection lamp of an electric car;
fig. 2 is a circuit diagram of a timing driving unit in the power supply system for a motor car maintenance lamp according to the present utility model.
Detailed Description
In order to enable those skilled in the art to better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the embodiments described below are only some, but not all, of the embodiments of the present utility model. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are within the scope of the present utility model based on the embodiments described herein.
Example 1
A power supply system for a motor car maintenance lamp comprises an alternating straight unit and a timing driving unit;
The alternating direct unit is provided with a power supply positive electrode output end VCC;
As shown in FIG. 1, the timing driving unit comprises a voltage stabilizer U2, a singlechip U3 and an encoder SW DIP-3, wherein the voltage stabilizer U2 can be LM7805, the singlechip can be EC340EGC, and the encoder DS-3;
The input end of the voltage stabilizer U2 is connected to the power supply positive electrode output end VCC through a first current limiting resistor R7, and the output end of the voltage stabilizer U2 is connected to the 2 nd pin power supply positive electrode pin of the singlechip U3;
The encoder SW DIP-3 is provided with three encoding switches, namely a first encoding switch K1, a second encoding switch K2 and a third encoding switch K3, wherein one end pin of the first encoding switch K1, one end pin of the second encoding switch K2 and one end pin of the third encoding switch K3 are respectively connected with the 7 th pin, the 6 th pin and the 5 th pin of the singlechip U3, namely the 1 st pin, the 2 nd pin and the 3 rd pin of the encoder SW DIP-3 are respectively grounded, and the other end pin of the first encoding switch K1, the second encoding switch K2 and the other end pin of the third encoding switch K3 are respectively grounded;
a trigger circuit is connected between the 8 th pin of the singlechip U3 and the output end of the voltage stabilizer U2, and comprises a trigger switch SW-PB and an anti-shake capacitor C12 which is connected with the trigger switch SW-PB in parallel and is grounded;
the 3 rd pin of the singlechip U3 is connected with a driving circuit, and the driving circuit comprises a driving MOS tube Q1;
The grid electrode of the driving MOS tube Q1 is connected to the 3 rd pin of the single chip microcomputer U3 through a second current limiting resistor R9, the source electrode of the driving MOS tube Q1 is grounded, and the drain electrode of the driving MOS tube Q1 is used as the output end of the driving circuit.
Preferably, the driving circuit further comprises a suppression resistor R8 and a bleeder capacitor C13;
One end of the suppression resistor R8 and one end of the bleeder capacitor C13 are both connected to the grid electrode of the driving MOS tube Q1, and the other end of the suppression resistor R8 and the other end of the bleeder capacitor C13 are both connected to the source electrode of the driving MOS tube Q1.
When the method is applied, the time of the encoder SW DIP-3 is set according to the requirement, and the setting can be referred to the following table:
For example, if the inspection time is set to 15 minutes, the first code switch K1, the second code switch K2, and the third code switch K3 may be respectively modulated to the ground, the null, and the null states.
In order to facilitate connection of the maintenance lamps LED1-LED6, the LED lamp further preferably comprises a first interface J1, wherein the 1 st pin of the first interface J1 is connected to the positive output end VCC of the power supply, and the 2 nd pin of the first interface J1 is connected to the drain electrode of the driving MOS tube Q1. As shown in FIG. 1, the serially connected maintenance light LEDs 1-6 are connected to the second interface J2, and the timing driving unit can realize timing driving of the maintenance light LEDs 1-6 by inserting the second interface J2 to the first interface J1. Specifically, when the trigger switch SW-PB is pressed during use, after the trigger switch is triggered to the ground, the 3 rd pin of the single chip microcomputer U3 outputs a high level, the current is limited by the second current limiting resistor R9, the gate of the driving MOS tube Q1 is provided with a conducting voltage, the driving MOS tube Q1 is conducted, the maintenance light LED1-LED6 can be powered, if the maintenance time is set to 15 minutes, the 3 rd pin of the single chip microcomputer U3 outputs a low level after 15 minutes of illumination, the driving MOS tube Q1 is cut off, and accordingly, the maintenance light LED1-LED6 is extinguished. Re-pressing the trigger switch SW-PB re-clocks.
The suppression resistor R8 is used for protecting the driving MOS transistor Q1, and the discharge capacitor C13 is used for assisting in preventing interference signals; the anti-shake capacitor C12 is used to eliminate a burr voltage generated by contact shake.
Preferably, the trigger circuit further comprises an indicating diode LED, an anode terminal of the indicating diode LED is connected to the output terminal of the voltage stabilizer U2, and a cathode terminal of the indicating diode LED is grounded.
In this embodiment, when the output of the output terminal of the voltage regulator U2 is normal, the indicator diode LED will illuminate to indicate that the power supply state is normal.
Preferably, the first coding switch, the second coding switch, the third coding switch, and the common node of the trigger switch and the singlechip are all connected with a pull-up resistor connected to the output end of the voltage stabilizer.
As shown in fig. 1, a first pull-up resistor R10 connected to the output end of the voltage stabilizer U2 is connected to the common connection point of the 1 st pin of the encoder SW DIP-3 and the 7 th pin of the single-chip microcomputer U3, a second pull-up resistor R11 connected to the output end of the voltage stabilizer U2 is connected to the common connection point of the 2 nd pin of the encoder SW DIP-3 and the 6 th pin of the single-chip microcomputer U3, a third pull-up resistor R12 connected to the output end of the voltage stabilizer U2 is connected to the common connection point of the 3 rd pin of the encoder SW DIP-3 and the 5 th pin of the single-chip microcomputer U3, and a fourth pull-up resistor R13 connected to the output end of the voltage stabilizer U2 is connected to the common connection point of the trigger switch SW-PB and the 8 th pin of the single-chip microcomputer U3. The pull-up resistors can enable the circuit to always keep high level when the circuit is not triggered, and low level is given to perform corresponding work when the trigger switch SW-PB presses the trigger.
Preferably, a grounded driving filter capacitor is connected between the input end of the voltage stabilizer, the output end of the voltage stabilizer and the power supply anode pin and the power supply cathode pin of the singlechip.
In this embodiment, as shown in fig. 1, an input end of a voltage regulator U2 is connected with a first grounded driving filter capacitor C9, an output end of the voltage regulator U2 is connected with a second grounded driving filter capacitor C10, and a third driving filter capacitor C11 is connected between a 2 nd pin and a4 th pin of the single chip microcomputer U3. The driving filter capacitors can absorb current fluctuation generated in the working process of the electronic circuit, and stability is improved.
As shown in fig. 2, preferably, the alternating direct current unit includes a switching power supply U1, the switching power supply U1 may be BP3166, the switching power supply U1 is connected with a transformer KB, and a secondary coil of the transformer KB is connected with a rectifying circuit;
the rectification circuit comprises a rectification diode D3, a first power supply filter capacitor C7, a second power supply filter capacitor C8, a charging capacitor C6 and a discharging resistor R6 which are connected with the rectification diode D3 in parallel and grounded;
The anode end of the rectifying diode D3 is connected to the secondary coil of the transformer KB, and the cathode end of the rectifying diode D3 is used as the positive output end VCC of the power supply.
The alternating-current direct-current unit is used for realizing rectification of high-frequency alternating current into constant-current direct current, wherein the rectifying diode D3 can cut off the negative part of the amplitude modulation signal and only leave the positive part, so that the effect of alternating-current direct-current signal is achieved. The discharging resistor R6 and the charging capacitor C6 can perform a discharging operation while charging to maintain balance. The first power supply filter capacitor C7 and the second power supply filter capacitor C8 can absorb interference which is connected in series through the alternating current power supply, and the influence of alternating pulsating current on an electronic circuit is reduced.
Preferably, the rectifying diode D3 is further connected in parallel with a protection circuit, and the protection circuit includes a protection resistor and a protection capacitor connected in series.
In this embodiment, the protection circuit includes a protection resistor R5 and a protection capacitor C5 connected in series. The protection resistor R5 and the protection capacitor C5 may protect the rectifier diode D3.
Preferably, the corresponding pin of the switching power supply is also connected with a sampling circuit, and the sampling circuit comprises a plurality of sampling resistors which are connected in parallel and grounded.
As shown in fig. 2, the sampling circuit class includes three sampling resistors connected in parallel and grounded, which are a first sampling resistor RS1, a second sampling resistor RS2, and a third sampling resistor RS3. The sampling resistor is used to adjust the duty cycle of the PWM.
The foregoing is a further detailed description of the utility model in connection with specific preferred embodiments, and it is not intended that the utility model be limited to these descriptions. Other embodiments of the utility model, which are apparent to those skilled in the art to which the utility model pertains without departing from its technical scope, shall be covered by the protection scope of the utility model.
Claims (10)
1. The utility model provides a motor car overhauls power supply system for lamp which characterized in that: comprises an alternating straight unit and a timing driving unit;
the alternating direct-current unit is provided with a power supply positive electrode output end;
The timing driving unit comprises a voltage stabilizer, a singlechip and an encoder;
The input end of the voltage stabilizer is connected to the positive output end of the power supply through the first current limiting resistor, and the output end of the voltage stabilizer is connected to the positive pin of the power supply of the singlechip;
The encoder is provided with three encoding switches, namely a first encoding switch, a second encoding switch and a third encoding switch, wherein one end pins of the first encoding switch, the second encoding switch and the third encoding switch are respectively connected with corresponding pins of the singlechip, and the other end pins of the first encoding switch, the second encoding switch and the third encoding switch are grounded;
a trigger circuit is connected between a trigger pin of the singlechip and the output end of the voltage stabilizer, and comprises a trigger switch and an anti-shake capacitor which is connected with the trigger switch in parallel and is grounded;
The driving pin of the singlechip is connected with a driving circuit.
2. The power supply system for a motor car maintenance lamp according to claim 1, wherein: the driving circuit comprises a driving MOS tube;
The grid electrode of the driving MOS tube is connected to the driving pin of the singlechip through the second current limiting resistor, the source electrode of the driving MOS tube is grounded, and the drain electrode of the driving MOS tube is used as the output end of the driving circuit.
3. The power supply system for a motor car maintenance lamp according to claim 2, wherein: the driving circuit further comprises a suppression resistor and a bleeder capacitor;
One end of the suppression resistor and one end of the bleeder capacitor are both connected to the grid electrode of the driving MOS tube, and the other end of the suppression resistor and the other end of the bleeder capacitor are both connected to the source electrode of the driving MOS tube.
4. The power supply system for a motor car maintenance lamp according to claim 2, wherein: the power supply further comprises a first interface, a first pin of the first interface is connected with the positive output end of the power supply, and a second pin of the first interface is connected with the output end of the driving circuit.
5. The power supply system for a motor car maintenance lamp according to claim 1, wherein: the trigger circuit further comprises an indication diode, wherein the anode end of the indication diode is connected to the output end of the voltage stabilizer, and the cathode end of the indication diode is grounded.
6. The power supply system for a motor car maintenance lamp according to claim 1, wherein: the first coding switch, the second coding switch, the third coding switch and the common node of the trigger switch and the singlechip are all connected with a pull-up resistor connected to the output end of the voltage stabilizer.
7. The power supply system for a motor car maintenance lamp according to claim 1, wherein: the input end of the voltage stabilizer, the output end of the voltage stabilizer, and the grounded driving filter capacitor are connected between the power supply anode pin and the power supply cathode pin of the singlechip.
8. The power supply system for a motor car maintenance lamp according to claim 1, wherein: the alternating direct-current unit comprises a switching power supply, the switching power supply is connected with a transformer, and a secondary coil of the transformer is connected with a rectifying circuit;
The rectifying circuit comprises a rectifying diode, a power supply filter capacitor, a charging capacitor and a discharging resistor, wherein the power supply filter capacitor is connected with the rectifying diode in parallel and grounded;
The anode end of the rectifier diode is connected with the secondary coil of the transformer, and the cathode end of the rectifier diode is used as the positive output end of the power supply.
9. The power supply system for a motor car maintenance lamp according to claim 8, wherein: and the rectifying diode is also connected with a protection circuit in parallel, and the protection circuit comprises a protection resistor and a protection capacitor which are connected in series.
10. The power supply system for a motor car maintenance lamp according to claim 8, wherein: the corresponding pin of the switching power supply is also connected with a sampling circuit, and the sampling circuit comprises a plurality of sampling resistors which are connected in parallel and grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322820533.1U CN220985906U (en) | 2023-10-20 | 2023-10-20 | Power supply system for motor car maintenance lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322820533.1U CN220985906U (en) | 2023-10-20 | 2023-10-20 | Power supply system for motor car maintenance lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220985906U true CN220985906U (en) | 2024-05-17 |
Family
ID=91042077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322820533.1U Active CN220985906U (en) | 2023-10-20 | 2023-10-20 | Power supply system for motor car maintenance lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220985906U (en) |
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2023
- 2023-10-20 CN CN202322820533.1U patent/CN220985906U/en active Active
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