CN217135747U - Driving circuit for long distance and lighting system - Google Patents
Driving circuit for long distance and lighting system Download PDFInfo
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- CN217135747U CN217135747U CN202123108267.7U CN202123108267U CN217135747U CN 217135747 U CN217135747 U CN 217135747U CN 202123108267 U CN202123108267 U CN 202123108267U CN 217135747 U CN217135747 U CN 217135747U
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Abstract
The application discloses a drive circuit and lighting system for long distance includes control circuit, first wire L2, second wire L3, clamping circuit, load circuit, wherein: the first end of the clamping circuit is electrically connected with the first end of the first conducting wire L2 and the first end of the control circuit respectively, the second end of the first conducting wire L2 is electrically connected with the first end of the load circuit, the first end of the second conducting wire L3 is electrically connected with the second end of the load circuit, and the second end of the second conducting wire L3 is electrically connected with the second end of the clamping circuit and the second end of the control circuit respectively; and the clamping circuit is used for clamping the voltage of the control circuit according to the voltage condition of the control circuit. Compared with the prior art, the control circuit has the advantages that the stability and the reliability of the circuit can be improved, and the influence on the control circuit is reduced.
Description
Technical Field
The application relates to the technical field of dimming, in particular to a driving circuit and a lighting system for a long distance.
Background
The photographic lamp light modulation scheme on the market at present almost all is that the drive plate is placed nearby with the lamp plate, generally all puts the drive plate at the lamp body and guarantees that drive plate and lamp plate distance do not too far away, and the drive plate and the lamp plate that have partial photographic lamp do not put together, but the interval can not too long, and the power can not too big yet.
But if place control box and lamp body in with drive plate and lamp plate respectively on, can lead to having longer connecting wire between control box and the lamp body, this longer connecting wire can lead to the electric current to take place the distortion at the in-process of adjusting luminance to influence light and join in marriage, perhaps be producing voltage peak at the in-process of adjusting luminance easily, probably puncture the switch, produce very big reliability hidden danger. Therefore, it is important to provide a driving circuit and a lighting system for long distance to improve the stability and reliability of the circuit, reduce the influence on the light parameter, and realize long distance dimming.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a driving circuit and an electronic device for long distance to reduce parasitic inductance of a long distance line, improve stability and reliability of the circuit, and reduce limitation on the type selection of a switching tube to realize long distance dimming.
In order to solve the above technical problem, the present application is implemented based on the following technical solutions:
a driving circuit for a long distance includes a control circuit, a first conductive line L2, a second conductive line L3, a clamp circuit, a load circuit, wherein:
a first end of the clamping circuit is electrically connected to a first end of the first conducting wire L2 and a first end of the control circuit, respectively, a second end of the first conducting wire L2 is electrically connected to a first end of the load circuit, a first end of the second conducting wire L3 is electrically connected to a second end of the load circuit, and a second end of the second conducting wire L3 is electrically connected to a second end of the clamping circuit and a second end of the control circuit, respectively;
the control circuit is configured to control the load circuit to turn on or off, and the clamp circuit is configured to turn on the clamp circuit, the first conductor (L2), the second conductor (L3), and the load circuit loop when the control circuit turns off the load circuit.
Further, the control circuit comprises a power supply circuit and an MCU circuit; the first end of MCU circuit with power supply circuit's first end electricity is connected, wherein:
and the MCU circuit is used for transmitting a dimming pulse width signal for controlling the on-off of the long-distance driving circuit.
Further, the control circuit further comprises a dimming driving chip; the first end of the dimming driving chip is electrically connected with the second end of the power supply circuit, the second end of the dimming driving chip is electrically connected with the first end of the clamping circuit and the first end of the first conducting wire L2 respectively, the third end of the dimming driving chip is electrically connected with the second end of the second conducting wire L3 and the second end of the clamping circuit respectively, and the fourth end of the dimming driving chip is electrically connected with the second end of the MCU circuit.
Further, the control circuit further comprises a dimming driving circuit and a detection circuit; the second end of the MCU circuit is electrically connected with the first end of the dimming drive circuit, the third end of the MCU circuit is electrically connected with the first end of the detection circuit, and the second end of the dimming drive circuit is electrically connected with the second end of the detection circuit; the second ends of the power supply circuits are electrically connected to the first ends of the clamp circuits and the first end of the first conductive line L2, respectively, wherein:
the detection circuit is used for detecting a waveform according to the charge-discharge speed difference of the dimming drive circuit and generating a voltage feedback signal to the MCU circuit;
the MCU circuit is also used for adjusting the voltage of the power supply circuit according to the voltage feedback signal fed back by the detection circuit;
and the dimming driving circuit is used for controlling the on-off of the driving circuit for the long distance according to the dimming pulse width signal.
Further, the first conductive line L2 is parallel to the second conductive line L3;
the direction of the current in the first conductor line L2 is opposite to the direction of the current in the second conductor line L3.
Further, the first conducting wire L2 and the second conducting wire L3 are parallel or the first conducting wire L2 and the second conducting wire L3 are coaxial and parallel.
Further, the dimming driving circuit includes a first power supply voltage VCC1, a first switching device Q2, a first capacitor C5, a second switching device Q3, a first diode D3, a first resistor R2, a second resistor R6, a third resistor R7, and a fourth resistor R8, where:
a first end of the first switching device Q2 is electrically connected to a first end of the first capacitor C5, a second end of the second wire L3 and a second end of the clamping circuit, respectively, a second end of the first switching device Q2 is electrically connected to a second end of the first capacitor C5, a first end of the second resistor R6 and a first end of the third resistor R7, respectively, a third end of the first switching device Q2 is electrically connected to a first end of the first resistor R2 and a first end of the second switching device Q3, respectively; a second terminal of the second switching device Q3 is electrically connected to the second terminal of the second resistor R6, the first terminal of the fourth resistor R8 and the first terminal of the first diode D3, respectively, and a third terminal of the second switching device Q3, a second terminal of the fourth resistor R8 and a second terminal of the third resistor R7 are all grounded; the first resistor R2 is electrically connected with the first power supply voltage VCC1, and the second end of the first diode D3 is electrically connected with the MCU circuit;
the first capacitor C5 is used for storing the electric quantity discharged by the first conductor (L2) and the second conductor (L3) when the first switching device Q2 is turned off.
Further, the clamping circuit also comprises a reverse voltage regulator tube Z1;
the reverse voltage regulator tube Z1 and the second diode D1 are connected in series with the clamping circuit; a first end of the reverse voltage regulator tube Z1 is electrically connected with a first end of the first lead wire L2 and a first end of the control circuit respectively, and a second end of the reverse voltage regulator tube Z1 is electrically connected with a first end of the second diode D1; a second terminal of the second diode D1 is electrically connected to a second terminal of the second wire L3 and a second terminal of the control circuit, respectively;
and the reverse voltage-stabilizing tube Z1 is used for accelerating the falling speed of the current.
Further, the detector circuit includes a second supply voltage VCC2, a third diode D2, a second capacitor C6, a fifth resistor R3, a sixth resistor R4, and a seventh resistor R5, where:
a first end of the third diode D2 is electrically connected to a first end of the sixth resistor R4, and a second end of the third diode D2 is electrically connected to a second end of the dimming driving circuit; a second end of the sixth resistor R4 is electrically connected to a first end of the second capacitor C6, a first end of the fifth resistor R3, a first end of the seventh resistor R5 and a second end of the MCU circuit, respectively; a second end of the second capacitor C6 and a second end of the seventh resistor R5 are both grounded; the second end of the fifth resistor R3 is electrically connected to the second power supply voltage VCC 2.
Further, the power supply circuit includes a third switching device Q1, a third capacitor C1, a fourth capacitor C2, a fifth capacitor C3, a sixth capacitor C4, a power supply IC, an eighth resistor R1, and a fourth Diode, where:
a first end of the third switching device Q1 is electrically connected to a first end of the fourth Diode, a first end of the third capacitor C1, and a first end of the fourth capacitor C2, respectively, a second end of the third switching device Q1 is electrically connected to a first end of the eighth resistor R1, and a third end of the third switching device Q1 is electrically connected to a first end of the power IC; a second end of the third capacitor C1, a second end of the fourth capacitor C2, a second end of the fifth capacitor C3, a second end of the sixth capacitor C4 and a second end of the eighth resistor R1 are all grounded; a second end of the fourth Diode is electrically connected to a first end of the fifth capacitor C3, a first end of the sixth capacitor C4, a first end of the clamping circuit, and a first end of the first wire L2, respectively; the second end of the power supply IC is electrically connected with the second end of the control circuit.
A lighting system comprises a first shell, a second shell and the driving circuit, wherein the load circuit comprises a plurality of light sources arranged on the first shell, the control circuit is arranged on the second shell, the first lead L2 and the second lead L3 are electrically connected between the first shell and the second shell, and the clamping circuit is arranged in the first shell or the second shell. .
Compared with the prior art, the beneficial effects of this application are:
the application discloses drive circuit for long distance includes control circuit, first wire L2, second wire L3, clamping circuit, load circuit, wherein: the first end of the clamping circuit is electrically connected with the first end of the first conducting wire L2 and the first end of the control circuit respectively, the second end of the first conducting wire L2 is electrically connected with the first end of the load circuit, the first end of the second conducting wire L3 is electrically connected with the second end of the load circuit, and the second end of the second conducting wire L3 is electrically connected with the second end of the clamping circuit and the second end of the control circuit respectively; and the clamping circuit is used for clamping the voltage of the control circuit according to the voltage condition of the control circuit. Compared with the prior art, the long-distance driving circuit and the lighting system can improve the stability and reliability of the circuit, reduce the influence on the parasitic inductance circuit on the internal switch of the control circuit, reduce the influence on light parameter and realize long-distance dimming.
It is to be understood that within the scope of the present application, the above-mentioned features of the present application and those specifically described below (e.g., in the examples) may be combined with each other to form new or preferred embodiments. Not to be reiterated herein, but to the extent of space.
Drawings
Fig. 1 is a schematic structural diagram of a driving circuit frame for a long distance according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a control circuit framework for a long-distance driving circuit according to an embodiment of the present application.
Fig. 3 is a schematic structural diagram of a driving circuit for long distance according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of another principle of a driving circuit for long distance according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of an illumination system according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like refer to the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which the utility model product is conventionally placed in use, and are used for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.
To explain the technical solution in the present application more clearly, first, a simple description is made of the parasitic inductance generated by a long-distance wire: in the connection control of lamp body and control box, often can use longer connecting wire, the parasitic inductance that long distance wire produced can produce peak voltage in the moment of dimmer switch shutoff, and parasitic inductance is big more, and the electric current is big more, and the voltage spike of production also can be big more, on the other hand, can prevent the electric current rise when dimmer switch switches on, brings the electric current and takes place the distortion and influence the light and join in marriage. This application adds a freewheel diode through the both ends of walking the line at long distance and provides the freewheel route for parasitic inductance to limit the peak voltage of the switch tube of dimmer switch and be approximately equal to the positive terminal voltage of LED, no matter how much the electric current is, the voltage peak that parasitic inductance's size produced all is basically equal to the positive terminal voltage of LED. The parasitic inductance of a wire is related to the length, cross-sectional area and magnetic permeability of the wire. The longer the wire, the greater the parasitic inductance. The conducting wires are folded in half and arranged side by side, the directions of the flowing currents are opposite, the directions of the generated magnetic fields are also opposite, and the inductance presented to the outside is greatly reduced. The closer the parallel lines are, the better the cancellation effect between them is, and the lower the inductance will be. The smaller the influence on the current, thereby realizing long-distance dimming.
As shown in fig. 1, the present embodiment discloses a driving circuit for a long distance, which includes a control circuit, a first conducting wire L2, a second conducting wire L3, a clamping circuit, and a load circuit, wherein:
the first end of the clamping circuit is electrically connected to the first end of the first conducting wire L2 and the first end of the control circuit, respectively, the second end of the first conducting wire L2 is electrically connected to the first end of the load circuit, the first end of the second conducting wire L3 is electrically connected to the second end of the load circuit, and the second end of the second conducting wire L3 is electrically connected to the second end of the clamping circuit and the second end of the control circuit, respectively. The control circuit is used for controlling the load circuit to be turned on or off, and it is understood that a control switch may be disposed inside the control circuit, and when the internal control switch is turned on, the control circuit may send a control signal so that the control circuit, the first conducting wire L2, the second conducting wire L3 and the load circuit form a loop and are turned on. The clamping circuit is configured to turn on the clamping circuit, the first conducting line L2, the second conducting line L3 and the load circuit loop when the control circuit turns off the load circuit. When the internal control switch is turned off, the control circuit can send a control signal to enable the control circuit, the first conducting wire L2, the second conducting wire L3 and the load circuit to form a loop which is turned off, at the moment, the first conducting wire L2, the second conducting wire L3 and the load circuit loop of the clamping circuit are turned on, at the moment, no inductive current exists or the inductive current enters the switch of the control circuit, and then the control circuit can be protected.
It is understood that the load circuit may include several light sources, such as LEDs, organic light emitting diodes, quantum dot light emitting diodes, and the like, but the embodiments of the present application are not limited thereto. The control circuit is used for controlling on or off of the light source, or controlling light efficiency of the light source, and the like, and it can be understood that the control circuit may specifically include modules such as an MCU, a switching tube, and a power supply circuit, and the first wire and the second wire are used for transmitting signals such as current and voltage from the control circuit to a load circuit (for example, the light source) for operation. Of course, the load circuit may be a fan, a motor, or other components that need to be driven.
The driving circuit for long distance is optional, when the element in the control circuit for controlling the on-off of the driving circuit for long distance is turned off, the current generated by the first conducting wire L2 and the second conducting wire L3 will charge the first capacitor C5 in parallel with the switching element, and when the voltage of the switching element is greater than the target voltage of the specific component, the current generated by the second conducting wire L3 will flow among the first conducting wire L2, the second conducting wire L3 and the load circuit through the clamping circuit and be gradually consumed to clamp the voltage of the switching element.
As shown in fig. 2, in the present embodiment, the control circuit includes a power supply circuit and an MCU circuit; the first end of MCU circuit is connected with power supply circuit's first end electricity, wherein:
and the MCU circuit is used for transmitting a dimming pulse width signal for controlling the on-off of the long-distance driving circuit.
Specifically, in this embodiment, the control circuit further includes a dimming driving chip; the first end of the dimming driving chip is electrically connected with the second end of the power supply circuit, the second end of the dimming driving chip is electrically connected with the first end of the clamping circuit and the first end of the first conducting wire L2 respectively, the third end of the dimming driving chip is electrically connected with the second end of the second conducting wire L3 and the second end of the clamping circuit respectively, and the fourth end of the dimming driving chip is electrically connected with the second end of the MCU circuit.
Optionally, the dimming driving chip is configured to control the on/off of the driving circuit for a long distance according to the dimming pulse width signal.
As shown in fig. 3, in the present embodiment, the control circuit further includes a dimming driving circuit and a detection circuit; the second end of the MCU circuit is electrically connected with the first end of the dimming drive circuit, the third end of the MCU circuit is electrically connected with the first end of the detection circuit, and the second end of the dimming drive circuit is electrically connected with the second end of the detection circuit; the second end of the power supply circuit is electrically connected to the first end of the clamping circuit and the first end of the first conductor L2, respectively, wherein:
the detection circuit is used for detecting a waveform according to the charge-discharge speed difference of the dimming drive circuit and generating a voltage feedback signal to the MCU circuit;
the MCU circuit is also used for adjusting the voltage of the power supply circuit according to a voltage feedback signal fed back by the detection circuit;
and the dimming driving circuit is used for controlling the on-off of the driving circuit for the long distance according to the dimming pulse width signal.
Optionally, the dimming driving circuit outputs a constant current corresponding to the dimming pulse width signal according to the dimming pulse width signal.
Specifically, in the present embodiment, the first conducting line L2 is parallel to the second conducting line L3; the direction of the current in the first conductor L2 is opposite to the direction of the current in the second conductor L3.
Optionally, the parallel connection between the first conducting line L2 and the second conducting line L3 includes a parallel connection between a partial line segment of the first conducting line L2 and a partial line segment of the second conducting line L3, or a parallel connection between a whole line segment of the first conducting line L2 and a whole line segment of the second conducting line L3, which is not limited in the embodiment of the present application.
In some embodiments, the first conductive line L2 is parallel to the second conductive line L3. In other embodiments, the first conductor L2 is coaxial with and parallel to the second conductor L3, e.g., the first conductor L2 is spaced coaxially around the second conductor L3. In still other embodiments, the segment of the first conductive line L2 is parallel to the segment of the second conductive line L3. In still other embodiments, the segment of the first conductor L2 is coaxial and parallel to the segment of the second conductor L3.
In some embodiments, the first and second conductive lines L2 and L3 are the same in number and cross-section; the first conductive line L2 and the second conductive line L3 are parallel to each other. Of course, the number of the first wires L2 is greater than the number of the second wires L3, the cross section of the first wire L2 is smaller than the cross section of the second wire L3, and the first wires L2 are disposed around the second wires L3 at regular intervals.
Alternatively, the magnetic field generated by the first wire L2 and the magnetic field generated by the second wire L3 cancel each other to some extent. It is understood that the closer the distance between the first and second conductive lines L2 and L3 is, the better.
Specifically, in this embodiment, the dimming driving circuit includes a first power supply voltage VCC1, a first switching device Q2, a first capacitor C5, a second switching device Q3, a first diode D3, a first resistor R2, a second resistor R6, a third resistor R7, and a fourth resistor R8, where:
a first end of the first switching device Q2 is electrically connected to a first end of the first capacitor C5, a second end of the second wire L3 and a second end of the clamping circuit, respectively, a second end of the first switching device Q2 is electrically connected to a second end of the first capacitor C5, a first end of the second resistor R6 and a first end of the third resistor R7, respectively, a third end of the first switching device Q2 is electrically connected to a first end of the first resistor R2 and a first end of the second switching device Q3, respectively; a second end of the second switching device Q3 is electrically connected to the second end of the second resistor R6, the first end of the fourth resistor R8 and the first end of the first diode D3, respectively, and a third end of the second switching device Q3, a second end of the fourth resistor R8 and a second end of the third resistor R7 are all grounded; the first resistor R2 is electrically connected with a first power supply voltage VCC1, and the second end of the first diode D3 is electrically connected with the MCU circuit;
and a first capacitor C5 for storing the amount of power discharged from the first and second conductors L2 and L3 when the first switching device Q2 is turned off.
Alternatively, when the first switching device Q2 is turned on while the first switching device Q2 is switching, the current of the power supply circuit flows through the LED along the first conductor L2 and then passes through the first switching device Q2, and the LED is lit. When the first switching device Q2 is turned off, the current of the first wire L2 (and/or the second wire L3) cannot change abruptly, and the current raises the voltage of the first capacitor C5, and when the voltage of the first capacitor C5 is greater than the supply voltage of the supply circuit, the current of the first wire L2 flows through the D1 of the second diode, so that a closed loop is formed among the first wire L2, the second wire L3, the load circuit, and the second diode D1.
In the embodiment, the clamping circuit includes a second diode D1 or mos transistor;
and a second diode D1 for electrically communicating the first end of the first conductor L2 with the second end of the second conductor L3 when the voltage of the control circuit is greater than the target voltage. It will be appreciated that the mos tube contains a diode and thus can serve the same function.
Optionally, the target voltage includes an output voltage of a power supply of the control circuit, or an output voltage of a specific control element, which is not limited in this application.
In some embodiments, with reference to fig. 4 in combination, the clamp circuit further includes an inverting regulator tube Z1;
the reverse voltage regulator tube Z1 and a second diode D1 are connected in series with the clamping circuit; a first end of a reverse voltage regulator tube Z1 is electrically connected with a first end of the first lead wire L2 and a first end of the control circuit respectively, and a second end of the reverse voltage regulator tube Z1 is electrically connected with a first end of the second diode D1; a second terminal of the second diode D1 is electrically connected to a second terminal of the second wire L3 and a second terminal of the control circuit, respectively;
and a reverse voltage regulator tube Z1 for accelerating the falling speed of the current. Alternatively, the reverse regulator tube Z1 may be a linear regulator. The negative electrode of the reverse voltage-regulator tube Z1 is connected with the negative electrode of the second diode D1.
In some embodiments, the detector circuit includes a second supply voltage VCC2, a third diode D2, a second capacitor C6, a fifth resistor R3, a sixth resistor R4, and a seventh resistor R5, wherein:
a first end of the third diode D2 is electrically connected to a first end of the sixth resistor R4, and a second end of the third diode D2 is electrically connected to a second end of the dimming driving circuit; a second end of the sixth resistor R4 is electrically connected to the first end of the second capacitor C6, the first end of the fifth resistor R3, the first end of the seventh resistor R5 and the second end of the MCU circuit, respectively; a second end of the second capacitor C6 and a second end of the seventh resistor R5 are both grounded; the second end of the fifth resistor R3 is electrically connected to the second power supply voltage VCC 2.
Optionally, the detection circuit detects the waveform by setting a difference in charge and discharge speeds of the capacitor. The discharging speed of the second capacitor C6 through the third diode D2 is much faster than the charging speed of the fifth resistor R3 to the second capacitor C6. When the voltage at the cathode of the third diode D2 is lower than the anode voltage, since the discharging speed of the second capacitor C6 through the third diode D2 is fast, the voltage of the second capacitor C6 is quickly dropped to be added to the voltage at the cathode of the third diode D2 by a PN junction voltage, and when the voltage at the cathode of the third diode D2 is higher than the anode voltage, since the fifth resistor R3 is much larger than the sixth resistor R4, the charging speed of the second capacitor C6 is much lower than the discharging speed, when the voltage at the cathode drops again when the first switching device Q2 is turned on next time, the voltage at the cathode of the second capacitor C6 hardly changes. Therefore, in a steady state, the voltage of the second capacitor C6 is equal to the cathode voltage + a PN junction voltage of the third diode D2, the voltage feedback signal is fed back to the MCU circuit, and the MCU circuit determines whether the voltage of the power supply circuit needs to be adjusted according to the voltage.
In some embodiments, the power supply circuit includes a third switching device Q1, a third capacitor C1, a fourth capacitor C2, a fifth capacitor C3, a sixth capacitor C4, a power supply IC, an eighth resistor R1, and a fourth Diode, wherein:
a first end of a third switching device Q1 is electrically connected to a first end of a fourth Diode, a first end of a third capacitor C1 and a first end of a fourth capacitor C2, respectively, a second end of the third switching device Q1 is electrically connected to a first end of an eighth resistor R1, and a third end of the third switching device Q1 is electrically connected to a first end of the power supply IC; the second end of the third capacitor C1, the second end of the fourth capacitor C2, the second end of the fifth capacitor C3, the second end of the sixth capacitor C4 and the second end of the eighth resistor R1 are all grounded; a second end of the fourth Diode is electrically connected with a first end of the fifth capacitor C3, a first end of the sixth capacitor C4, a first end of the clamping circuit and a first end of the first wire L2 respectively; the second end of the power supply IC is electrically connected with the second end of the control circuit.
Referring to fig. 5, an embodiment of the present application further provides an illumination system, which includes a first housing, a second housing, and the driving circuit as described above, wherein the load circuit includes a plurality of light sources disposed on the first housing, the control circuit is disposed on the second housing, the first conducting wire L2 and the second conducting wire L3 are electrically connected between the first housing and the second housing, and the clamping circuit is disposed in the first housing or the second housing. It is understood that the light sources disposed in the first housing may form a lamp body, the control circuit disposed in the second housing may form a control box, and the first wire L2 and the second wire L3 are detachably connected between the first housing and the second housing, respectively, i.e. the lamp body and the control box may be electrically connected in a pluggable manner through the coaxially disposed first and second wires. ,
while the preferred embodiments of the present application have been described in detail, it should be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings without inventive faculty. Therefore, any technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concepts of the present application shall fall within the scope of protection defined by the claims.
Claims (10)
1. A driver circuit for long distances, comprising a control circuit, a first conductor (L2), a second conductor (L3), a clamping circuit, a load circuit, wherein:
the first ends of the clamping circuits are respectively and electrically connected with the first end of the first conducting wire (L2) and the first end of the control circuit, the second end of the first conducting wire (L2) is electrically connected with the first end of the load circuit, the first end of the second conducting wire (L3) is electrically connected with the second end of the load circuit, and the second end of the second conducting wire (L3) is respectively and electrically connected with the second end of the clamping circuits and the second end of the control circuit;
the control circuit is configured to control the load circuit to turn on or off, and the clamp circuit is configured to turn on the clamp circuit, the first conductor (L2), the second conductor (L3), and the load circuit loop when the control circuit turns off the load circuit.
2. The driving circuit for long distances according to claim 1, wherein the control circuit comprises a power supply circuit and an MCU circuit; the first end of MCU circuit with power supply circuit's first end electricity is connected, wherein:
the MCU circuit is used for transmitting a dimming pulse width signal for controlling the on-off of the long-distance driving circuit;
driving circuit for long distance the control circuit comprises a dimming driving chip; the first end of the dimming driving chip is electrically connected with the second end of the power supply circuit, the second end of the dimming driving chip is electrically connected with the first end of the clamping circuit and the first end of the first conducting wire (L2) respectively, the third end of the dimming driving chip is electrically connected with the second end of the second conducting wire (L3) and the second end of the clamping circuit respectively, and the fourth end of the dimming driving chip is electrically connected with the second end of the MCU circuit.
3. The driving circuit for long distances according to claim 1, wherein the control circuit comprises a power supply circuit and an MCU circuit; the first end of MCU circuit with power supply circuit's first end electricity is connected, wherein:
the MCU circuit is used for transmitting a dimming pulse width signal for controlling the on-off of the long-distance driving circuit; the control circuit comprises a dimming drive circuit and a detection circuit; the second end of the MCU circuit is electrically connected with the first end of the dimming drive circuit, the third end of the MCU circuit is electrically connected with the first end of the detection circuit, and the second end of the dimming drive circuit is electrically connected with the second end of the detection circuit; a second end of the power supply circuit is electrically connected to a first end of the clamping circuit and a first end of the first conductor (L2), respectively, wherein:
the detection circuit is used for detecting a waveform according to the charge-discharge speed difference of the dimming drive circuit and generating a voltage feedback signal to the MCU circuit;
the MCU circuit is also used for adjusting the voltage of the power supply circuit according to the voltage feedback signal fed back by the detection circuit;
and the dimming driving circuit is used for controlling the on-off of the driving circuit for the long distance according to the dimming pulse width signal.
4. Driving circuit for long distances according to claim 1, characterized in that the first conductor line (L2) is parallel to the second conductor line (L3);
the direction of current flow in the first conductor (L2) is opposite to the direction of current flow in the second conductor (L3);
wherein the first and second conductive lines (L2, L3) are identical in number and cross section; the first conductive line (L2) and the second conductive line (L3) are parallel to each other;
or, the number of the first conductive lines (L2) is greater than the number of the second conductive lines (L3), the cross section of the first conductive lines (L2) is smaller than the cross section of the second conductive lines (L3), and the first conductive lines (L2) are uniformly spaced around the second conductive lines (L3).
5. The driving circuit for long distance according to claim 3, wherein the dimming driving circuit comprises a first power supply voltage (VCC1), a first switching device (Q2), a first capacitor (C5), a second switching device (Q3), a first diode (D3), a first resistor (R2), a second resistor (R6), a third resistor (R7) and a fourth resistor (R8), wherein:
a first end of the first switching device (Q2) is electrically connected to a first end of the first capacitor (C5), a second end of the second lead (L3) and a second end of the clamping circuit, respectively, a second end of the first switching device (Q2) is electrically connected to a second end of the first capacitor (C5), a first end of the second resistor (R6) and a first end of the third resistor (R7), respectively, a third end of the first switching device (Q2) is electrically connected to a first end of the first resistor (R2) and a first end of the second switching device (Q3), respectively; a second end of the second switching device (Q3) is electrically connected to a second end of the second resistor (R6), a first end of the fourth resistor (R8) and a first end of the first diode (D3), respectively, and a third end of the second switching device (Q3), a second end of the fourth resistor (R8) and a second end of the third resistor (R7) are all grounded; the first resistor (R2) is electrically connected with the first power supply voltage (VCC1), and the second end of the first diode (D3) is electrically connected with the MCU circuit;
the first capacitor (C5) is used for storing the electric quantity discharged by the first conductor (L2) and the second conductor (L3) when the first switching device (Q2) is turned off.
6. The driving circuit for long distances according to claim 1, characterized in that the clamping circuit comprises a second diode (D1) or mos transistor; the load circuit comprises a plurality of light sources;
the second diode (D1) or mos tube is used for electrically communicating the first end of the first lead (L2) and the second end of the second lead (L3) when the voltage of the control circuit is larger than the target voltage.
7. The driving circuit for long distances according to claim 6, wherein the clamping circuit further comprises a reverse regulator (Z1);
the reverse regulator tube (Z1) is connected in series with the second diode (D1); a first end of the reverse voltage regulator tube (Z1) is electrically connected with a first end of the first lead wire (L2) and a first end of the control circuit respectively, and a second end of the reverse voltage regulator tube (Z1) is electrically connected with a first end of the second diode (D1); a second terminal of the second diode (D1) is electrically connected to a second terminal of the second wire (L3) and a second terminal of the control circuit, respectively;
the reverse voltage-stabilizing tube (Z1) is used for accelerating the descending speed of the current.
8. The driving circuit for long distances according to claim 3, characterized in that the wave detection circuit comprises a second supply voltage (VCC2), a third diode (D2), a second capacitor (C6), a fifth resistor (R3), a sixth resistor (R4), a seventh resistor (R5), wherein:
a first end of the third diode (D2) is electrically connected to a first end of the sixth resistor (R4), and a second end of the third diode (D2) is electrically connected to a second end of the dimming driving circuit; a second end of the sixth resistor (R4) is electrically connected with a first end of the second capacitor (C6), a first end of the fifth resistor (R3), a first end of the seventh resistor (R5) and a second end of the MCU circuit respectively; a second terminal of the second capacitor (C6) and a second terminal of the seventh resistor (R5) are both grounded; the second end of the fifth resistor (R3) is electrically connected with the second power supply voltage (VCC 2).
9. The driving circuit for long distances according to claim 2 or 3, wherein the power supply circuit comprises a third switching device (Q1), a third capacitor (C1), a fourth capacitor (C2), a fifth capacitor (C3), a sixth capacitor (C4), a power IC, an eighth resistor (R1), and a fourth Diode (Diode), wherein:
a first end of the third switching device (Q1) is electrically connected to a first end of the fourth Diode (Diode), a first end of the third capacitor (C1) and a first end of the fourth capacitor (C2), respectively, a second end of the third switching device (Q1) is electrically connected to a first end of the eighth resistor (R1), and a third end of the third switching device (Q1) is electrically connected to a first end of the power supply IC; a second terminal of the third capacitor (C1), a second terminal of the fourth capacitor (C2), a second terminal of the fifth capacitor (C3), a second terminal of the sixth capacitor (C4), and a second terminal of the eighth resistor (R1) are all grounded; a second end of the fourth Diode (Diode) is electrically connected to a first end of the fifth capacitor (C3), a first end of the sixth capacitor (C4), a first end of the clamping circuit, and a first end of the first wire (L2), respectively; the second end of the power supply IC is electrically connected with the second end of the control circuit.
10. A lighting system, comprising a first housing, a second housing, and a driving circuit according to any one of claims 1-9, wherein the load circuit comprises a plurality of light sources disposed on the first housing, the control circuit is disposed on the second housing, the first and second wires (L2, L3) are electrically connected between the first and second housings, and the clamping circuit is disposed in the first or second housing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123108267.7U CN217135747U (en) | 2021-12-10 | 2021-12-10 | Driving circuit for long distance and lighting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123108267.7U CN217135747U (en) | 2021-12-10 | 2021-12-10 | Driving circuit for long distance and lighting system |
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| CN217135747U true CN217135747U (en) | 2022-08-05 |
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| CN202123108267.7U Active CN217135747U (en) | 2021-12-10 | 2021-12-10 | Driving circuit for long distance and lighting system |
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