Power supply device

Abstract

The embodiment of the utility model discloses a power supply device, and belongs to the technical field of electronics. The device comprises an annunciator, a signal lamp, a power line and a power taking circuit, the power output end of the annunciator is connected with the first end of the power line, and the power supply end of the signal lamp is connected with the second end of the power line; the electricity taking circuit comprises a rectifying circuit, a booster circuit, an energy storage circuit and a step-down circuit, the input end of the rectifying circuit is connected with the power line, the output end of the rectifying circuit is connected with the input end of the booster circuit, the output end of the booster circuit is connected with the input end of the energy storage circuit, and the output end of the energy storage circuit is connected with the input end of the step-down circuit. The output end of the step-down circuit is connected with the power supply end of signal lamp accessory equipment. After the alternating current on the power line is converted into the direct current, the direct current is boosted and then charges the energy storage circuit, so that the energy storage circuit can store more electric energy, and the cruising ability and the load capacity of the power supply device are further improved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a power supply device. Background Art

[0002] With the development of the intelligent transportation industry, more equipment needs to be installed on signal light poles, and these added equipment need to solve the problem of how to power them. The traditional solution is to lay cables to power these devices, but this usually requires breaking the road for construction, which is costly and time-consuming, and will also cause inconvenience to the public. Utility Model Content

[0003] The present application provides a power supply device that can provide continuous power supply to signal light accessories without adding new cables. The technical solution is as follows:

[0004] The present application provides a power supply device, the device comprising a signal machine, a signal light, a power line, and a power supply circuit, wherein the power output end of the signal machine is connected to the first end of the power line, and the power supply end of the signal light is connected to the second end of the power line;

[0005] The power supply circuit includes a rectifier circuit, a boost circuit, an energy storage circuit and a step-down circuit. The input end of the rectifier circuit is connected to the power line, the output end of the rectifier circuit is connected to the input end of the boost circuit, the output end of the boost circuit is connected to the input end of the energy storage circuit, the output end of the energy storage circuit is connected to the input end of the step-down circuit, and the output end of the step-down circuit is used to connect to the power supply end of the signal light accessories.

[0006] Optionally, when the output voltage of the energy storage circuit is within a first voltage range, the buck circuit is in an operating state.

[0007] Optionally, the power line includes a red light live line, a yellow light live line, a green light live line and a neutral line, and the rectifier circuit includes a first rectifier, a second rectifier and a third rectifier;

[0008] The first input ends of the first rectifier, the second rectifier and the third rectifier are respectively connected to the red light live wire, the yellow light live wire and the green light live wire; the second input ends of the first rectifier, the second rectifier and the third rectifier are all connected to the neutral line, the positive output ends of the first rectifier, the second rectifier and the third rectifier are all connected to the first input end of the boost circuit, and the negative output ends of the first rectifier, the second rectifier and the third rectifier are all connected to the second input end of the boost circuit.

[0009] Optionally, the boost circuit comprises a boost subcircuit and a control subcircuit, the input end of the boost subcircuit is connected to the output end of the rectifier circuit, the output end of the boost subcircuit is connected to the input end of the energy storage circuit, the output end of the control subcircuit is connected to the control end of the boost subcircuit, and the first detection end of the control subcircuit is connected to the output end of the boost subcircuit;

[0010] Wherein, the voltage output by the boost subcircuit is a reference voltage.

[0011] Optionally, the second detection terminal of the control subcircuit is connected to the input terminal of the boost subcircuit;

[0012] Wherein, during the operation of the boost subcircuit, the voltage at the input end of the boost subcircuit is not greater than a limit threshold.

[0013] Optionally, the boost subcircuit includes an energy storage inductor, a metal oxide semiconductor field effect MOS tube, a first diode, and a first resistor;

[0014] The first end of the energy storage inductor is connected to the positive output end of the rectifier circuit, the second end of the energy storage inductor is respectively connected to the drain of the MOS tube and the positive electrode of the first diode, the gate of the MOS tube is connected to the output end of the control subcircuit, the source of the MOS tube is respectively connected to the first end of the first resistor and the ground, and the second end of the first resistor is connected to the negative output end of the rectifier circuit.

[0015] Optionally, the control subcircuit includes a controller and a second resistor;

[0016] The output end of the controller is connected to the control end of the boost subcircuit, the first detection end of the controller is connected to the output end of the boost subcircuit, one end of the second resistor is grounded, and the other end is connected to the first detection end of the controller.

[0017] Optionally, the output end of the step-down circuit is also connected to the power supply end of the step-up circuit.

[0018] Optionally, the power supply circuit further includes a voltage conversion circuit, the input end of the voltage conversion circuit is connected to the output end of the step-down circuit, and the output end of the voltage conversion circuit is connected to the power supply end of the step-up circuit.

[0019] Optionally, the signal light accessory equipment includes a radar or a radar sight.

[0020] The technical solution provided by this application can at least bring the following beneficial effects:

[0021] By directly taking power from the power line through the power-taking circuit, the power on the power line is used to power the auxiliary equipment of the signal light. There is no need to break the road for construction or lay additional power lines, which can greatly reduce the construction period and construction cost, and also avoid the inconvenience of public travel caused by breaking the road for construction. The unstable voltage output by the rectifier circuit is uniformly increased to the reference voltage through the boost circuit, and then the energy storage circuit is charged by the boosted direct current. Compared with the method without the boost circuit, the energy storage circuit can store more electric energy, so that the energy storage circuit can ensure stable power supply for a longer period of time when the signal light is off, thereby improving the endurance and load capacity of the power supply device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 is a structural schematic diagram of a power supply device provided in an embodiment of the present application;

[0024] Figure 2 is a structural schematic diagram of another power supply device provided in an embodiment of the present application;

[0025] Figure 3 is a structural schematic diagram of another power supply device provided in an embodiment of the present application;

[0026] Figure 4 is a schematic diagram of the structure of another power supply device provided in an embodiment of the present application;

[0027] Figure 5 is a circuit connection diagram of a boost sub-circuit provided in an embodiment of the present application;

[0028] Figure 6 is a circuit connection diagram of a control subcircuit provided in an embodiment of the present application;

[0029] Figure 7 is a circuit connection diagram of another control subcircuit provided in an embodiment of the present application;

[0030] Figure 8 is a circuit connection diagram of another control subcircuit provided in an embodiment of the present application;

[0031] Fig. 9 is a circuit connection diagram of another control subcircuit provided in an embodiment of the present application;

[0032] Fig.10is a structural schematic diagram of another power supply device provided in an embodiment of the present application;

[0033] Fig.11 is a structural schematic diagram of another power supply device provided in an embodiment of the present application;

[0034] Fig.12 It is a circuit connection diagram of a power supply circuit provided in an embodiment of the present application;

[0035] Fig.13 It is a circuit connection diagram of another power supply circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0036] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0037] The present application embodiment provides a power supply device, such as Figure 1 As shown, the device includes a signal machine 1, a signal lamp 2, a power line 3, and a power supply circuit 4. The signal machine 1 is connected to the first end d1 of the power line 3, and the signal lamp 2 is connected to the second end d2 of the power line 3. The power supply circuit 4 includes a rectifier circuit 41, a booster circuit 42, a tank circuit 43, and a step-down circuit 44. The input end z1 of the rectifier circuit 41 is connected to the power line 3, the output end z2 of the rectifier circuit 41 is connected to the input end s1 of the booster circuit 42, the output end s2 of the booster circuit 42 is connected to the input end c1 of the tank circuit 43, the output end c2 of the tank circuit 43 is connected to the input end j1 of the step-down circuit 44, and the output end j2 of the step-down circuit 44 is used to connect to the power supply end of the signal lamp accessory equipment.

[0038] The signal light accessory equipment may include a radar or a radar sight. The signal light accessory equipment may also include other equipment located near the signal light, which is not limited in the embodiment of the present application.

[0039] It should be noted that the power line 3 in the embodiment of the present application is above the road surface. The input end z1 of the rectifier circuit 41 can be connected to any position point on the power line 3. For example, the first part of the power line 3 is located in the chassis of the signal light 2, and the input end z1 of the rectifier circuit 41 can be connected to any position point on the first part of the power line 3.

[0040] When current flows on the power line, the current flowing is usually 50Hz AC. The rectifier circuit 41 uses a device with unidirectional conductive characteristics to convert the AC with changed direction and magnitude into DC. In other words, the rectifier circuit 41 is used to convert the AC on the power line 3 into DC.

[0041] Since the voltage of the AC power on the power line 3 is unstable, generally in the range of 85V-265V, the voltage of the DC power rectified by the rectifier circuit 41 is also variable, generally (85V-265V)×1.441, which is approximately in the range of 120V-375V.

[0042] The boost circuit 42 is used to increase the voltage of the direct current so as to charge the energy storage circuit 43 with the boosted direct current.

[0043] As can be seen from the above description, the voltage of the DC power rectified by the rectifier circuit 41 is variable. The boost circuit 42 can increase the voltage of the DC power rectified by the rectifier circuit 41 to a reference voltage. The reference voltage is usually any voltage value between 360V and 380V, or the reference voltage can also be other higher voltage values, which is not limited in the embodiment of the present application.

[0044] The energy storage circuit 43 may include one or more energy storage capacitors, and may also include one or more batteries (equivalent to large energy storage capacitors).

[0045] Since the amount of energy that can be stored in the energy storage capacitor is proportional to the square of the voltage across the energy storage capacitor, compared to directly using the DC power obtained by the rectifier circuit 41 to charge the energy storage circuit 43, using the boosted DC power through the boost circuit 42 to charge the energy storage circuit 43 can enable the energy storage circuit 43 to store more electric energy per unit volume. In addition, since the boost circuit 42 can increase the voltage of the DC power with voltage changes to the reference voltage and then charge the energy storage circuit 43, as long as there is current flowing on the power line 3, even if the voltage of the AC power on the power line 3 is unstable, compared to the case without the boost circuit 42, the energy storage circuit 43 can store more electric energy per unit volume, that is, the energy density in the energy storage circuit 43 is improved.

[0046] When current flows on the power line 3, the energy storage circuit 43 charges and discharges at the same time, and the charging and discharging can basically reach a balance, and the energy storage circuit 43 will always store the maximum energy it can store. However, the signal light 2 sometimes enters the flashing stage, for example, the signal light 2 flashes with a cycle of 0.5 seconds on and 0.5 seconds off, and the power line 3 has no current flowing during the time period when the signal light 2 is off, so that the energy storage circuit 43 cannot be charged. At this time, the energy storage circuit 43 only relies on the electric energy stored during the charging period to power the signal light accessories. Based on the above description, compared with the case where the boost circuit 42 does not exist, the energy storage circuit 43 in the embodiment of the present application can store more electric energy during the charging period. In this way, during the period when the signal light 2 is off, the energy storage circuit 43 can ensure a long period of stable power supply, that is, the boosted direct current is used by the boost circuit 42 to charge the energy storage circuit 43, so that the energy storage circuit 43 can store more electric energy, thereby improving the endurance and load capacity of the power supply circuit 4.

[0047] The voltage output by the energy storage circuit 43 is usually high and does not match the working voltage of the signal light accessory equipment. In the embodiment of the present application, the energy storage circuit 43 releases electric energy to the step-down circuit 44, and the step-down circuit 44 is used to convert the voltage output by the energy storage circuit 43 into the working voltage of the signal light accessory equipment. In this way, the voltage finally output by the power taking circuit 4 matches the working voltage of the signal light accessory equipment, thereby realizing power supply for the signal light accessory equipment.

[0048] In some embodiments, when the output voltage of the energy storage circuit 43 is within the first voltage range, the step-down circuit 44 is in operation. That is, when the voltage output by the energy storage circuit 43 is within the first voltage range, the step-down circuit 44 converts the voltage output by the energy storage circuit 43 into the operating voltage of the signal light accessory device. The first voltage range is the range of voltages that the energy storage circuit 43 may output, and by way of example, the first voltage range is 300V-380V.

[0049] Since the output voltage of the energy storage circuit 43 will gradually decrease when it is not charged but only discharged, if the step-down circuit 44 can only work when the voltage output by the energy storage circuit 43 is a certain voltage, the step-down circuit 44 cannot continuously output a stable voltage, and the signal light accessory equipment cannot work stably. Therefore, the step-down circuit 44 can work when the voltage output by the energy storage circuit 43 is within the first voltage range, so that the step-down circuit 44 can continuously and stably output the working voltage of the signal light radiation equipment. It can be seen that under normal circumstances, the first voltage range is a wider voltage range, so that the step-down circuit 44 can continue to work when the energy storage circuit is not charged but only discharged.

[0050] By directly taking power from the power line through the power-taking circuit, the electric energy on the power line is used to power the signal light accessories. There is no need to break the road for construction or lay additional power lines, which can greatly reduce the construction period and construction cost, and also avoid the inconvenience of public travel caused by breaking the road for construction. The unstable voltage output by the rectifier circuit is uniformly increased to the reference voltage through the boost circuit, and then the energy storage circuit is charged by the boosted direct current. Compared with the method without the boost circuit, the energy storage circuit can store more electric energy, so that the energy storage circuit can ensure a long period of stable power supply during the period when the signal light is off, thereby improving the endurance and load capacity of the power-taking circuit. In addition, when the voltage output by the energy storage circuit is within the first voltage range, the step-down circuit performs the operation of converting the voltage output by the energy storage circuit into the working voltage of the signal light accessories, so that the voltage output by the power-taking circuit matches the working voltage of the signal light accessories, and the power-taking circuit can stably output the working voltage of the signal light accessories, thereby realizing power supply for the signal light accessories.

[0051] like Figure 2 As shown, in some embodiments, the power line 3 includes a red live line 31, a yellow live line 32, a green live line 33 and a neutral line 34, and the rectifier circuit 41 includes a first rectifier DD1, a second rectifier DD2 and a third rectifier DD3. The first input terminals z11 of the first rectifier DD1, the second rectifier DD2 and the third rectifier DD3 are respectively connected to the red live line 31, the yellow live line 32 and the green live line 33; the second input terminals z12 of the first rectifier DD1, the second rectifier DD2 and the third rectifier DD3 are all connected to the neutral line 34, the positive output terminals z21 of the first rectifier DD1, the second rectifier DD2 and the third rectifier DD3 are all connected to the first input terminal s11 of the boost circuit 42, and the negative output terminals z22 of the first rectifier DD1, the second rectifier DD2 and the third rectifier DD3 are all connected to the second input terminal s12 of the boost circuit 42.

[0052] Since the alternating current on the power line 3 is usually three-phase alternating current, the first rectifier DD1, the second rectifier DD2, and the third rectifier DD3 can be any type of three-phase rectifier, such as a bridge rectifier, a drop-out rectifier, a switching power supply rectifier, etc., and the types of the first rectifier DD1, the second rectifier DD2, and the third rectifier DD3 can be the same or different, and the embodiments of the present application do not limit this.

[0053] Among them, the first rectifier DD1 is used to convert the AC power on the red light live wire 31 and the neutral wire 34 into DC power when the red light live wire 31 is energized; the second rectifier DD2 is used to convert the AC power on the yellow light live wire 32 and the neutral wire 34 into DC power when the yellow light live wire 32 is energized; the third rectifier DD3 is used to convert the AC power on the green light live wire 33 and the neutral wire 34 into DC power when the green light live wire 33 is energized.

[0054] Since only one of the red light live wire 31, the yellow light live wire 32, and the green light live wire 33 has current flowing at the same time, only one of the first rectifier DD1, the second rectifier DD2, and the third rectifier DD3 is working at the same time. Since the positive output terminals z21 of the first rectifier DD1, the second rectifier DD2, and the third rectifier DD3 are connected together and the negative output terminals z22 are connected together, as long as there is current flowing on the power line 3, the rectifier circuit 41 has current output.

[0055] like Figure 3 As shown, in some embodiments, the boost circuit 42 includes a boost sub-circuit 421 and a control sub-circuit 422, the input terminal sz1 of the boost sub-circuit 421 is connected to the output terminal z2 of the rectifier circuit 41, the output terminal sz2 of the boost sub-circuit 421 is connected to the input terminal c1 of the energy storage circuit 43, the output terminal kz2 of the control sub-circuit 422 is connected to the control terminal sz3 of the boost sub-circuit 421, and the first detection terminal jc1 of the control sub-circuit 422 is connected to the output terminal sz2 of the boost sub-circuit 421.

[0056] The control subcircuit 422 is used to send a control signal to the boost subcircuit 421 according to the voltage collected by the first detection terminal jc1. The boost subcircuit 421 is used to boost the voltage of the DC power to a reference voltage according to the control signal, that is, the voltage output by the boost subcircuit 421 is the reference voltage.

[0057] Since the first detection terminal jc1 of the control subcircuit 422 is connected to the output terminal sz2 of the boost subcircuit 421, the voltage collected by the first detection terminal jc1 is the voltage output by the boost subcircuit 421. After receiving the voltage collected by the first detection terminal jc1, the control subcircuit 422 determines the magnitude relationship between the voltage and the reference voltage. If the voltage is greater than the reference voltage, the control signal sent by the control subcircuit 422 is used to control the boost subcircuit 421 to suspend or slow down the operation; if the voltage is less than the reference voltage, the control signal sent by the control subcircuit 422 is used to control the boost subcircuit 421 to start or speed up the operation; if the voltage is equal to the reference voltage, the control subcircuit 422 does not send a control signal.

[0058] In this way, the control subcircuit and the boost subcircuit form a feedback loop, so that the voltage output by the boost subcircuit is substantially stabilized at the reference voltage.

[0059] like Figure 4 As shown, in some embodiments, the second detection terminal jc2 of the control sub-circuit 422 is connected to the input terminal sz1 of the boost sub-circuit 421. In addition, the boost sub-circuit 421 includes the following Figure 2 When the first input terminal s11 and the second input terminal s12 are connected, the second detection terminal jc2 of the control sub-circuit 422 is connected to the second input terminal s12 of the boost sub-circuit 421 (not shown in the figure).

[0060] The control subcircuit 422 is also used to control the boost subcircuit 421 to stop working when the voltage collected by the second detection terminal jc2 is greater than the limit threshold. That is, during the operation of the boost subcircuit 421, the voltage at the input terminal sz1 of the boost subcircuit 421 is not greater than the limit threshold.

[0061] The second detection terminal jc2 can detect the voltage of the input terminal sz1 of the boost sub-circuit 421. After receiving the voltage collected by the second detection terminal jc2, the control sub-circuit 422 determines the magnitude relationship between the voltage and the limit threshold. If the voltage is greater than or equal to the limit threshold, the control sub-circuit 421 outputs a control signal to control the boost sub-circuit 421 to stop working regardless of whether the voltage collected by the first detection terminal jc1 is greater than the reference voltage; if the voltage is less than the limit threshold, the control signal to be sent is determined according to the magnitude relationship between the voltage collected by the first detection terminal jc1 and the reference voltage.

[0062] The limit threshold is the maximum voltage that the boost sub-circuit 421 can withstand. If the voltage detected by the second detection terminal jc2 exceeds the limit threshold, the components in the boost sub-circuit 421 may be damaged.

[0063] By detecting the voltage at the input end of the boost subcircuit through the second detection end, it can be determined whether the voltage value currently borne by the boost subcircuit is above the limit threshold. If it is above the limit threshold, the control subcircuit controls the boost subcircuit to stop working, thereby protecting the circuit.

[0064] like Figure 5As shown, in some embodiments, the boost subcircuit 421 includes an energy storage inductor L1, a MOS tube (Metal Oxide Semiconductor Field Effect Transistor) Q1, a first diode D1, and a first resistor R1. The first end n1 of the energy storage inductor L1 is connected to the positive output terminal z21 of the rectifier circuit 41, the second end n2 of the energy storage inductor L1 is respectively connected to the drain D of the MOS tube Q1 and the positive electrode of the first diode D1, the gate G of the MOS tube Q1 is connected to the output terminal kz2 of the control subcircuit, the source S of the MOS tube Q1 is respectively connected to the first end r11 of the first resistor R1 and the ground, and the second end r12 of the first resistor R1 is connected to the negative output terminal z22 of the rectifier circuit 41. Obviously, the negative electrode of the first diode D1 is the output terminal sz2 of the boost subcircuit 421.

[0065] The MOS transistor Q1 is an enhanced N-channel MOS transistor. The embodiment of the present application does not limit the inductance of the energy storage inductor L1 and the resistance of the first resistor R1.

[0066] In this case, the control sub-circuit 422 is used to control the MOS tube Q1 to be turned on or off, so that the boost sub-circuit 421 can boost the voltage of the DC power to the reference voltage.

[0067] When the MOS tube Q1 is turned on, in the boost sub-circuit 421, the current flows from the first end n1 of the energy storage inductor L1 through the MOS tube Q1 and the first resistor R1 in sequence to the second end r12 of the first resistor R1. The voltage at the first end n1 of the energy storage inductor L1 is greater than the voltage at the second end n2 of the energy storage inductor L1. At this time, the current on the energy storage inductor L1 gradually increases.

[0068] When the MOS tube Q1 is disconnected, the current on the energy storage inductor L1 will not change suddenly, but the energy storage inductor L1 needs to release the current, and at this time the current on the energy storage inductor L1 cannot flow through the MOS tube Q1 and the first resistor R1. Therefore, at this time, the voltage at the second end n2 of the energy storage inductor L1 will passively increase, and is higher than the voltage at the first end n1 of the energy storage inductor L1, and is also higher than the forward conduction voltage of the first diode D2. The current on the energy storage inductor L1 will flow from the second end n2 of the energy storage inductor L1 through the first diode D2, and the current on the energy storage inductor L1 will gradually decrease to 0. After the MOS tube Q1 is turned on and off once, the energy storage inductor L1 completes a charge and discharge cycle. If the MOS tube Q1 is turned on and off quickly multiple times, the energy storage inductor L1 will release more current to the negative electrode of the first diode D2, and the voltage output by the boost subcircuit 421 will increase.

[0069] In addition, if Figure 5As shown, the boost subcircuit 421 may further include a first capacitor C1 , one end of the first capacitor C1 is connected to the first end n1 of the energy storage inductor L1 , and the other end of the first capacitor C1 is connected to the second end r12 of the first resistor R1 .

[0070] The first capacitor C1 is used to filter out clutter, so that the voltage output by the rectifier circuit 41 is more stable, and to avoid excessive clutter interference in subsequent circuits.

[0071] like Figure 6 As shown, in some embodiments, the control subcircuit 422 includes a controller U1 and a second resistor R2. The output terminal kz2 of the controller U1 is connected to the control terminal sz3 of the boost subcircuit 421, the first detection terminal jc1 of the controller U1 is connected to the output terminal sz2 of the boost subcircuit 421, the first terminal r21 of the second resistor R2 is grounded, and the second terminal r22 of the second resistor R2 is connected to the first detection terminal jc1 of the controller U1.

[0072] The controller U1 may be a boost power factor correction controller, or a device having the same function as the boost power factor correction controller.

[0073] The embodiment of the present application does not limit the resistance value of the second resistor R2 . The second resistor R2 can prevent the first detection terminal jc1 from being directly grounded, which causes the first detection terminal jc1 to be unable to measure the voltage output by the boost sub-circuit 421 .

[0074] In some embodiments, Figure 7 As shown, the control subcircuit 422 also includes a third resistor R3, one end of the third resistor R3 is connected to the second end r22 of the second resistor R2, and the other end is connected to the output end sz2 of the boost subcircuit 421, and the first detection end jc1 of the controller U1 is still connected to the second end r22 of the second resistor R2.

[0075] At this time, the second resistor R2 and the third resistor R3 divide the voltage output by the boost sub-circuit 421, and the voltage detected by the first detection terminal jc1 is the voltage on the second resistor R2. In this case, after the controller U1 obtains the voltage detected by the first detection terminal jc1, the detected voltage is divided by the resistance value of the second resistor R2, and then multiplied by the sum of the resistance values ​​of the second resistor R2 and the third resistor R3, and the voltage output by the boost sub-circuit 421 can be obtained.

[0076] In addition, if Figure 7As shown, the control subcircuit 422 may further include a second capacitor C2, one end of which is grounded, and the other end of which is connected to the second end r22 of the second resistor R2. The second capacitor C2 can remove the clutter received by the first detection terminal jc1, so that the voltage detected by the first detection terminal jc1 obtained by the controller U1 is more accurate, so that the voltage output by the current boost subcircuit 421 can be more accurately determined, and then the control signal that needs to be sent can be accurately determined.

[0077] In some embodiments, Figure 8 As shown, the control subcircuit 422 also includes a fourth resistor R4 and a fifth resistor R5, one end of the fourth resistor R4 is connected to the control end sz3 of the boost subcircuit 421, and the other end is connected to the output end kz2 of the controller U1, one end of the fifth resistor R5 is connected to the control end sz3 of the boost subcircuit 421, and the other end is grounded.

[0078] As can be seen from the above description, when the boost sub-circuit 421 is Figure 5 As shown, the control subcircuit 422 is used to control the MOS tube Q1 to be turned on or off. When the gate voltage of the MOS tube Q1 is greater than the turn-on voltage of the MOS tube, the MOS tube Q1 is turned on. Therefore, if the control subcircuit 422 controls the MOS tube Q1 to be turned on, a certain voltage needs to be output, and the fourth resistor R4 can prevent the MOS tube Q1 from being overcharged and damaged due to overcharging.

[0079] If the control subcircuit 422 controls the MOS tube Q1 to be disconnected, it is necessary to output a low level so that the electric energy on the MOS tube Q1 is released through path 1: control terminal sz3—output terminal kz2 of the control subcircuit 422. When the control subcircuit 422 includes the fifth resistor R5, the electric energy on the MOS tube Q1 can also be released through path 2: control terminal sz3—fifth resistor R5—ground. In other words, the fifth resistor R5 can accelerate the discharge process of the MOS tube Q1 and prevent the MOS tube Q1 from being in a semi-conducting state for a long time and being heated and burned.

[0080] It should be noted that the control sub-circuit 422 may further include a fourth resistor R4 but not a fifth resistor R5.

[0081] In some embodiments, Fig. 9 As shown, the control subcircuit 422 also includes a sixth resistor R6, a second diode D2 and a third capacitor C3, one end of the sixth resistor R6 is connected to the second input terminal s12 of the boost subcircuit 421, and the other end is connected to the second detection terminal jc2 of the controller U1, the cathode of the second diode D2 is connected to the second detection terminal jc2 of the controller U1, and the anode is grounded, and one end of the third capacitor C3 is also connected to the second detection terminal jc2 of the controller U1, and the other end is also grounded.

[0082] The sixth resistor R6 can prevent the controller U1 from being damaged due to an excessive current input to the second detection terminal jc2 , and the second diode D2 can prevent the controller U1 from being damaged due to an excessive voltage input to the second detection terminal jc2 .

[0083] The function of the third capacitor C3 is similar to that of the second capacitor C2, and it can remove the noise received by the second detection terminal jc2, so that the voltage detected by the second detection terminal jc2 is more accurate, so that the controller U1 can more accurately determine the voltage at the input end of the current boost sub-circuit 421, and further accurately determine the control signal that needs to be sent currently.

[0084] It should be noted that the control sub-circuit 422 may also include any one or any two of the sixth resistor R6, the second diode D2 and the third capacitor C3.

[0085] like Fig.10 As shown, in some embodiments, the output terminal j2 of the buck circuit 44 is also connected to the power supply terminal g2 of the boost circuit 42 .

[0086] In this case, the voltage output by the step-down circuit 44 not only matches the operating voltage of the signal light accessory equipment, but also matches the operating voltage of the boost circuit 42. The step-down circuit 44 is also used to supply power to the boost circuit 42. By directly supplying power to the boost circuit through the step-down circuit, the power supply device does not need to add additional components to meet its own operating voltage requirements, thereby avoiding the complexity of the power supply device.

[0087] When the boost circuit 42 includes the above-mentioned controller U1, the output end of the buck circuit 44 is connected to the power supply end of the controller U1 (not shown in the figure).

[0088] like Fig.11 As shown, in some embodiments, the power supply circuit 4 further includes a voltage conversion circuit 45, an input terminal h1 of the voltage conversion circuit 45 is connected to an output terminal j2 of the step-down circuit 44, and an output terminal h2 of the voltage conversion circuit 45 is connected to a power supply terminal g2 of the step-up circuit 42.

[0089] In this case, the voltage output by the step-down circuit 44 matches the operating voltage of the signal light accessories, but does not match the operating voltage of the boost circuit 42. At this time, the voltage conversion circuit 45 is used to convert the voltage output by the step-down circuit 44 into the operating voltage of the boost circuit 42, so as to power the boost circuit 42.

[0090] Likewise, when the boost circuit 42 includes the controller U1 , the output end of the voltage conversion circuit 45 is connected to the power supply end of the controller U1 .

[0091] It should be noted that the above-mentioned step-down circuit 44 may include an isolated or non-isolated step-down converter, and the above-mentioned voltage conversion circuit 45 may include an isolated or non-isolated voltage converter. The embodiment of the present application does not limit the composition of the step-down circuit 44 and the voltage conversion 45.

[0092] In addition, all of the above-mentioned resistors can be a single resistor or a combination of multiple resistors connected in parallel or in series, and the embodiments of the present application do not limit this.

[0093] It can be seen that, assuming that the power supply device includes a signal machine, a signal light, a power line, and a power circuit, and the power line includes a red light live wire, a yellow light live wire, a green light live wire, and a neutral wire, the power circuit can be as follows: Fig.12 The power supply circuit includes a rectifier circuit, a boost circuit, an energy storage circuit and a buck circuit.

[0094] Among them, the rectifier circuit includes a first rectifier DD1, a second rectifier DD2 and a third rectifier DD3; the boost circuit includes a boost sub-circuit and a control sub-circuit, the boost sub-circuit includes an energy storage inductor L1, a MOS tube Q1, a first diode D1, a first resistor R1 and a first capacitor C1, the control sub-circuit includes a controller U1, a second resistor R2, a third resistor R3, a second capacitor C2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a second diode D2 and a third capacitor C3; the energy storage circuit includes a fourth capacitor C4; the buck circuit includes a buck converter U2.

[0095] In the rectifier circuit, the first input terminal z11 of the first rectifier DD1, the second rectifier DD2, and the third rectifier DD3 are respectively connected to the red light live wire 31, the yellow light live wire 32, and the green light live wire 33; the second input terminal z12 of the first rectifier DD1, the second rectifier DD2, and the third rectifier DD3 are all connected to the neutral line 34. The positive output terminal z21 of the first rectifier DD1, the second rectifier DD2, and the third rectifier DD3 are all connected to the first input terminal s11 of the boost circuit, and the negative output terminal z22 of the first rectifier DD1, the second rectifier DD2, and the third rectifier DD3 are all connected to the second input terminal s12 of the boost circuit.

[0096] In the boost sub-circuit, the first end n1 of the energy storage inductor L1 is connected to the positive output end z21 of the rectifier circuit, the second end n2 of the energy storage inductor L1 is respectively connected to the drain D of the MOS tube Q1 and the positive electrode of the first diode D1, the source S of the MOS tube Q1 is respectively connected to the first end r11 of the first resistor R1 and the ground, the second end r12 of the first resistor R1 is connected to the negative output end z22 of the rectifier circuit, one end of the first capacitor C1 is connected to the first end n1 of the energy storage inductor L1, and the other end is connected to the second end r12 of the first resistor R1.

[0097] In the control subcircuit, the first end r21 of the second resistor R2 is grounded, the second end r22 of the second resistor R2 is connected to the first detection end jc1 of the controller U1, one end of the third resistor R3 is connected to the second end r22 of the second resistor R2, and the other end is connected to the cathode of the first diode D1, one end of the second capacitor C2 is grounded, and the other end is connected to the second end r22 of the second resistor R2. One end of the fourth resistor R4 is connected to the gate G of the MOS transistor Q1, and the other end is connected to the output end kz2 of the controller U1, one end of the fifth resistor R5 is connected to the gate G of the MOS transistor Q1, and the other end is grounded. One end of the sixth resistor R6 is connected to the second input end s12 of the boost subcircuit, and the other end is connected to the second detection end jc2 of the controller U1, one end of the second diode D2 is connected to the second detection end jc2 of the controller U1, and the other end is grounded, and one end of the third capacitor C3 is also connected to the second detection end jc2 of the controller U1, and the other end is also grounded.

[0098] In the energy storage circuit, one end of the fourth capacitor C4 is connected to the cathode of the first diode, and the other end is grounded.

[0099] In the step-down circuit, the input terminal u21 of the step-down converter U2 is connected to the cathode of the first diode, the first ground terminal jd1 and the second ground terminal jd2 of the step-down converter U2 are grounded respectively, the output terminal u22 and the second ground terminal jd2 of the step-down converter U2 are respectively used to connect the positive power supply terminal and the negative power supply terminal of the signal light accessories, and at the same time, the output terminal u22 of the step-down converter U2 is connected to the power supply terminal g2 of the controller U1.

[0100] Assuming that the power supply device includes a signal machine, a signal light, a power line, and a power circuit, and the power line includes a red light live wire, a yellow light live wire, a green light live wire, and a neutral wire, the power circuit can also be as follows: Fig.13 The power supply circuit includes a rectifier circuit, a boost circuit, an energy storage circuit, a buck circuit, and a voltage conversion circuit.

[0101] For the components and connections of the rectifier circuit, boost circuit, and energy storage circuit, please refer to the above Fig.12 The description will not be repeated here.

[0102] The step-down circuit includes a step-down converter U2, and the voltage conversion circuit includes a voltage converter U3. The input terminal u21 of the step-down converter U2 is connected to the cathode of the first diode, the first ground terminal jd1 and the second ground terminal jd2 of the step-down converter U2 are grounded respectively, the output terminal u22 and the second ground terminal jd2 of the step-down converter U2 are used to connect the positive power supply terminal and the negative power supply terminal of the signal light accessory equipment respectively, and at the same time, the output terminal u22 and the second ground terminal jd2 of the step-down converter U2 are connected to the input terminal u31 of the voltage converter U3 and the first ground terminal jd3 of the voltage converter U3 respectively. The output terminal u32 of the voltage converter U3 is connected to the power supply terminal g2 of the controller U1, and the second ground terminal jd4 of the voltage converter U3 is grounded.

[0103] In summary, the present application embodiment provides a Figure 1 Based on the power supply device shown in the figure, the power lines include a red light live line, a yellow light live line, a green light live line and a neutral line, and the power circuit is as follows Fig.12 or Fig.13 The power supply device shown can realize all the functions described above.

[0104] In the embodiment of the present application, the power is directly taken from the power line through the power taking circuit, and the electric energy on the power line is used to power the signal light accessories. There is no need to break the road for construction or lay additional power lines, which can greatly reduce the construction period and construction cost, and also avoid the inconvenience of public travel caused by breaking the road for construction. The unstable voltage output by the rectifier circuit is uniformly increased to the reference voltage by the boost circuit, and then the energy storage circuit is charged by the boosted direct current. Compared with the method without the boost circuit, the energy storage circuit can store more electric energy, so that the energy storage circuit can ensure stable power supply for a long time during the period when the signal light is off, thereby improving the endurance and load capacity of the power supply device. In addition, when the voltage output by the energy storage circuit is within the first voltage range, the step-down circuit performs the operation of converting the voltage output by the energy storage circuit into the working voltage of the signal light accessories, so that the voltage output by the power supply device matches the working voltage of the signal light accessories, and the power supply device can stably output the working voltage of the signal light accessories, thereby realizing power supply for the signal light accessories.

[0105] It should be understood that the "at least one" mentioned herein refers to one or more, and "multiple" refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first", "second" and the like are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first", "second" and the like do not limit the quantity and execution order, and the words "first", "second" and the like do not limit them to be necessarily different.

[0106] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in the embodiments of the present application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data need to comply with relevant laws, regulations and standards of relevant countries and regions.

[0107] The above-mentioned embodiments are provided for the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A power supply device, It is characterized in that The device includes a signal machine, a signal light, a power line, and a power supply circuit, wherein the power output end of the signal machine is connected to the first end of the power line, and the power supply end of the signal light is connected to the second end of the power line; The power supply circuit includes a rectifier circuit, a boost circuit, an energy storage circuit and a step-down circuit. The input end of the rectifier circuit is connected to the power line, the output end of the rectifier circuit is connected to the input end of the boost circuit, the output end of the boost circuit is connected to the input end of the energy storage circuit, the output end of the energy storage circuit is connected to the input end of the step-down circuit, and the output end of the step-down circuit is used to connect to the power supply end of the signal light accessories.

2. The device according to claim 1, It is characterized in that When the output voltage of the energy storage circuit is within the first voltage range, the buck circuit is in an operating state.

3. The device according to claim 1, It is characterized in that The power line includes a red light live line, a yellow light live line, a green light live line and a neutral line, and the rectifier circuit includes a first rectifier, a second rectifier and a third rectifier; The first input ends of the first rectifier, the second rectifier and the third rectifier are respectively connected to the red light live wire, the yellow light live wire and the green light live wire; the second input ends of the first rectifier, the second rectifier and the third rectifier are all connected to the neutral line, the positive output ends of the first rectifier, the second rectifier and the third rectifier are all connected to the first input end of the boost circuit, and the negative output ends of the first rectifier, the second rectifier and the third rectifier are all connected to the second input end of the boost circuit.

4. The device according to claim 1, It is characterized in that The boost circuit comprises a boost subcircuit and a control subcircuit, the input end of the boost subcircuit is connected to the output end of the rectifier circuit, the output end of the boost subcircuit is connected to the input end of the energy storage circuit, the output end of the control subcircuit is connected to the control end of the boost subcircuit, and the first detection end of the control subcircuit is connected to the output end of the boost subcircuit; Wherein, the voltage output by the boost subcircuit is a reference voltage.

5. The device as claimed in claim 4, It is characterized in that The second detection terminal of the control subcircuit is connected to the input terminal of the boost subcircuit; Wherein, during the operation of the boost subcircuit, the voltage at the input end of the boost subcircuit is not greater than a limit threshold.

6. The device as claimed in claim 4, It is characterized in that The boost subcircuit includes an energy storage inductor, a metal oxide semiconductor field effect MOS tube, a first diode, and a first resistor; The first end of the energy storage inductor is connected to the positive output end of the rectifier circuit, the second end of the energy storage inductor is respectively connected to the drain of the MOS tube and the positive electrode of the first diode, the gate of the MOS tube is connected to the output end of the control subcircuit, the source of the MOS tube is respectively connected to the first end of the first resistor and the ground, and the second end of the first resistor is connected to the negative output end of the rectifier circuit.

7. The device according to claim 4, It is characterized in that The control subcircuit includes a controller and a second resistor; The output end of the controller is connected to the control end of the boost subcircuit, the first detection end of the controller is connected to the output end of the boost subcircuit, one end of the second resistor is grounded, and the other end is connected to the first detection end of the controller.

8. The device according to claim 1, It is characterized in that The output end of the step-down circuit is also connected to the power supply end of the step-up circuit.

9. The device as claimed in claim 8, It is characterized in that The power taking circuit also includes a voltage conversion circuit, the input end of the voltage conversion circuit is connected to the output end of the step-down circuit, and the output end of the voltage conversion circuit is connected to the power supply end of the step-up circuit.

10. The device according to claim 1, It is characterized in that The signal light accessory equipment includes radar or radar vision.

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