CN216626118U - Current regulating circuit, power supply circuit, lamp and system for single live wire equipment - Google Patents
Current regulating circuit, power supply circuit, lamp and system for single live wire equipment Download PDFInfo
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- CN216626118U CN216626118U CN202122854656.8U CN202122854656U CN216626118U CN 216626118 U CN216626118 U CN 216626118U CN 202122854656 U CN202122854656 U CN 202122854656U CN 216626118 U CN216626118 U CN 216626118U
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Abstract
The utility model relates to a current regulating circuit, a power supply circuit, a lamp and a system for single live wire equipment, belonging to the technical field of switches, wherein the current regulating circuit comprises: a first circuit and a second circuit connected to each other; the first circuit comprises a depletion type MOS transistor Q1 and a resistor R1; the second circuit comprises a resistor R2 and a switching device Q2; the grid electrode of the depletion type MOS tube Q1 is connected between the resistor R2 and the switching device Q2, the drain electrode of the depletion type MOS tube Q1 and the resistor R2 are connected with the input end of the current regulating circuit, the source electrode of the depletion type MOS tube Q1 and the switching device Q2 are connected with the output end of the current regulating circuit, and the switching device Q2 is used for controlling the conduction degree of the depletion type MOS tube Q1 so as to regulate the current flowing through the first circuit; the utility model supplies power for single live wire equipment, so that the problem of flickering or slight brightness of the light source load is avoided in the closed state. The switching power supply circuit includes: the lamp is internally provided with a light source driving circuit, single-live-wire equipment and a current adjusting circuit.
Description
Technical Field
The utility model relates to the technical field of switches, in particular to a current regulating circuit, a power supply circuit, a lamp and a system for single-live-wire equipment.
Background
With the development of information technology and the improvement of the living standard of people, the living ideas of smart home, smart security and smart community are received by more and more people. Most families hope to replace the original old mechanical switch directly with the new intelligent switch under the condition of not needing rewiring when upgrading and realizing intelligent reconstruction of the home. Because original old mechanical switch adopts single live wire wiring mode, so the design of new intelligent switch must adopt the intelligent switch of single live wire system.
There is the microcontroller module in single live wire intelligence switch, and the microcontroller module usually needs zero, live wire to charge continuously. When the intelligent upgrading of house was reformed transform, single live wire intelligence switch was installed and is got the electricity on a live wire, and its principle is that the electric current that flows through load LED lamp forms the return circuit and realizes getting the electricity, because the operating current of single live wire intelligence switch demand is great, consequently under the state that electricity-saving lamp or LED lamp were closed, the lamp scintillation or the phenomenon of shining a little can appear in the in-process of getting the electricity. At present, the prior art has a technical scheme of supplying power to a microcontroller through an energy storage unit to solve the problem of flicker, but batteries need to be frequently replaced, and user experience is poor. The LED lamp belongs to capacitive load, influences the degree of accuracy of single live wire intelligence switch's alternating current zero sampling, influences the compatibility of adjusting luminance.
To sum up, need design the current regulation circuit that a compatible single live wire was used, for single live wire intelligence switch power supply, solve load LED lamp and appear twinkling or the little bright problem and solve the LED lamp and influence the degree of accuracy of single live wire intelligence switch's alternating current zero sampling under the off-state to the influence compatibility problem of adjusting luminance.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a current regulating circuit, a power supply circuit, a lamp and a system for single-live-wire equipment.
The utility model is realized by adopting the following technical scheme:
the embodiment of the utility model provides a current regulation circuit for single live wire equipment, which comprises: a first circuit and a second circuit connected to each other;
the first circuit comprises a depletion type MOS tube Q1 and a resistor R1, wherein the depletion type MOS tube Q1 is connected with the resistor R1 in series;
the second circuit comprises a resistor R2 and a switching device Q2, wherein the resistor R2 is connected with the switching device Q2 in series;
the grid electrode of the depletion type MOS tube Q1 is connected between the resistor R2 and the switching device Q2, the drain electrode of the depletion type MOS tube Q1 and the resistor R2 are connected with the input end of the current regulating circuit, the source electrode of the depletion type MOS tube Q1 and the switching device Q2 are connected with the output end of the current regulating circuit, and the switching device Q2 is used for controlling the conduction degree of the depletion type MOS tube Q1 so as to regulate the current flowing through the first circuit;
when the voltage at two ends of the first circuit is lower than a preset voltage, the switching device Q2 is switched off, and the depletion type MOS tube Q1 is switched on and then is in a first conduction state; when the voltage at the two ends of the first circuit reaches or exceeds the preset voltage, the switching device Q2 is conducted, and the depletion type MOS tube Q1 is in a second conduction state; the conduction degree of the depletion type MOS tube Q1 in the first conduction state is larger than that of the depletion type MOS tube Q1 in the second conduction state.
In some embodiments, the first circuit further includes a zener diode ZD1, and the source of the depletion type MOS transistor Q1, the zener diode ZD1 and the resistor R1 are sequentially connected in series.
In some embodiments, the second circuit further includes a zener diode ZD2, the resistor R2, the zener diode ZD2 and the switching device Q2 are sequentially connected in series, and the gate of the depletion type MOS transistor Q1 is connected between the resistor R2 and the zener diode ZD 2.
In some embodiments, the reverse breakdown conduction voltage of zener diode ZD2 is less than the reverse breakdown conduction voltage of zener diode ZD 1.
In some embodiments, the current regulating circuit further comprises a third circuit connected to the second circuit for controlling the on/off of the switching device Q2.
In some embodiments, the third circuit comprises resistors R3 and R4 and a zener diode ZD3, wherein the reverse breakdown voltage of zener diode ZD3 is greater than that of zener diode ZD 1;
the voltage stabilizing diode ZD3 is connected with the input end of the current regulating circuit, the voltage stabilizing diode ZD3 is connected with the resistor R3 and the resistor R4 in series, the control electrode of the switching device Q2 is connected between the resistor R3 and the resistor R4, and the R4, the resistor R1 and the switching device Q2 are connected with the output end of the current regulating circuit.
In some embodiments, the switching device Q2 is a triode or an enhancement MOS transistor.
In some embodiments, the current regulating circuit further comprises a fuse and a rectifying module, and the input terminal of the current regulating circuit is connected to the fuse and the rectifying module.
In another aspect, an embodiment of the present invention provides a power supply circuit for a single-live-wire device, including:
the lamp is internally provided with a light source driving circuit;
a single live wire device connected in series with the light fixture for controlling the light fixture;
and the current regulating circuit is connected with the single live wire equipment in series and is arranged in parallel with the light source driving circuit.
On the other hand, the embodiment of the utility model provides a lamp, which comprises a lamp body, wherein a current regulating circuit and a light source driving circuit are arranged in the lamp body, and the current regulating circuit and the light source driving circuit are arranged in parallel; or the lamp comprises a lamp body and an adapter, the adapter is detachably mounted on the lamp body and used for mounting the lamp body on the lamp holder, a light source driving circuit is arranged inside the lamp body, the adapter is provided with a current adjusting circuit, and the current adjusting circuit and the light source driving circuit are arranged in parallel when the adapter is mounted on the lamp body.
On the other hand, an embodiment of the present invention provides a lamp system, including a first lamp and at least one second lamp, where the at least one second lamp is connected in parallel with the first lamp, the first lamp is provided with a current regulation circuit and a light source driving circuit, and the current regulation circuit and the light source driving circuit are arranged in parallel.
The utility model provides a current regulating circuit, a power supply circuit, a lamp and a system for single live wire equipment, and compared with the prior art, the technical effects obtained by the utility model comprise that:
1. based on the characteristics of a depletion type MOS tube, current flows through a first circuit to supply power for a single live wire switch through the conduction of a depletion type MOS tube Q1, so that the phenomenon that the light source load flickers or slightly shines when the light source load is in a closed state and the current flows through a light source driving circuit to supply power for the single live wire switch is avoided; meanwhile, the conduction degree of the depletion type MOS tube Q1 is controlled by the switch device Q2, the depletion type MOS tube Q1 is in a first conduction state after being conducted in a lower voltage range of each period of the power frequency alternating current (at the moment, voltages at two ends of the first circuit are below a preset voltage), and the depletion type MOS tube Q1 is in a second conduction state in a higher voltage range of each period of the power frequency alternating current (at the moment, voltages at two ends of the first circuit reach or exceed the preset voltage), the current of the first circuit is adjusted by adjusting the conduction state of the depletion type MOS tube Q1 in a high-voltage interval, so that the current of the first circuit falls back to a lower position, and the overall power consumption of the current adjusting circuit can be reduced.
Drawings
FIG. 1 is a block diagram of an embodiment of a current regulation circuit according to the present invention;
FIG. 2 is a schematic diagram of a current regulation circuit according to an embodiment of the present invention;
FIG. 3 is a graph of the output characteristics of a depletion MOS transistor;
FIG. 4 is a graph of an AC voltage-current waveform according to an embodiment of the present invention;
FIG. 5 is a block diagram of a lamp according to an embodiment of the present invention;
fig. 6 is a block diagram of a lamp system according to an embodiment of the utility model.
Detailed Description
In order to better explain the present invention and to facilitate the understanding of the technical solutions of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and examples. The examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are to be read in the light of the appended claims.
The MOS transistor is also called a field effect transistor, i.e., an insulating field effect transistor in an integrated circuit. The MOS is called Metal-Oxide-Semiconductor (MOS-Semiconductor), and specifically, this name describes the structure of a MOS transistor in an integrated circuit, namely: and adding silicon dioxide and metal on a semiconductor device with a certain structure to form a grid electrode. The MOS tube utilizes the voltage of the grid electrode to control the current, so the MOS tube is a device for controlling the current by the voltage. As shown in fig. 3, the output characteristic curve of the depletion type MOS transistor shows that the parameters of different types of MOS transistors are different. As can be seen from the figure, the output characteristic of the depletion type MOS transistor can be divided into three regions: a variable resistance region, a constant current region, and a breakdown region. The magnitude of the on-current Ids is determined by the gate voltage and the source voltage.
It should be noted that, in the embodiment of the present invention, the power frequency alternating current is rectified and then flows into the first circuit, so voltages at two ends of the first circuit are both in a positive half cycle, and in addition, the embodiment of the present invention is exemplified by using a single live wire switch, where the single live wire switch may be a switch having only an opening and closing function or a dimming switch further having a dimming function; those skilled in the art can also apply the current regulating circuit of the embodiment of the present invention to other single-hot line devices according to actual needs.
Example 1
Fig. 1 is a block diagram of a current regulator circuit according to the present invention. In the prior art, a single live wire switch takes electricity through a light source driving circuit, so that the light source load can flicker or slightly brighten in a closed state. The utility model provides the technical scheme shown in fig. 1, and provides a current regulating circuit as a power supply circuit of a single live wire switch, so that a light source driving circuit is prevented from supplying power to the single live wire switch. When the current regulating circuit is applied, the current regulating circuit is connected with the light source driving circuit at two ends of the input voltage in parallel, the light source driving circuit controls the light source load, and the light source dimming is realized by outputting different voltages or currents. Based on this principle, the present invention provides a current regulation circuit, comprising: the first circuit and the second circuit are connected with each other and grounded, wherein the first circuit comprises a depletion type MOS tube Q1 and a resistor R1, the depletion type MOS tube Q1 is connected with the resistor R1 in series, the second circuit comprises a resistor R2 and a switch device Q2, the resistor R2 is connected with the switch device Q2 in series, the gate of the depletion type MOS tube Q1 is connected between the resistor R2 and the switch device Q2, the resistor R1 and the resistor R2 are connected with the input end of the current regulation circuit, the source of the depletion type MOS tube Q1 and the switch device Q2 are connected with the output end of the current regulation circuit, preferably, the drain of the depletion type MOS tube Q1 and the resistor R2 are connected with the input end of the current regulation circuit, and the resistor R1 and the switch device Q2 are connected with the output end of the current regulation circuit. And a switching device Q2, preferably a triode or enhancement MOS transistor.
According to the utility model, through the conduction of the depletion type MOS tube Q1, current flows through the first circuit to supply power for the single live wire switch, so that the phenomenon that the light source load flickers or slightly shines when the light source load is in a closed state and the current flows through the light source driving circuit to supply power for the single live wire switch is avoided; specifically, a large amount of positive ions are doped in an SiO2 insulating layer in advance during manufacturing of the depletion MOS transistor, so when Ugs is equal to 0, the positive ions already induce an inversion layer to form a channel, and then, as long as a drain-source voltage Uds exists, a drain current exists, so that power frequency alternating current can be supplied to a single-live-wire switch through the first circuit when the power frequency alternating current is in a low-voltage range.
Based on the characteristics of the depletion type MOS transistor, the depletion type MOS transistor Q1 in the first circuit is controlled to be in different conducting states through the disconnection and the conduction of the switching device Q2 in the second circuit, and the single-live-wire switch is charged. The embodiment of the utility model can realize that the switching device Q2 is controlled to be switched off when the voltage at two ends of the first circuit is below the preset voltage in the lower voltage range of each period of the power frequency alternating current, and the depletion type MOS transistor Q1 is in a first conduction state after being conducted; in a higher voltage range of each period of the power frequency alternating current, namely when the voltage at two ends of the first circuit reaches or exceeds a preset voltage, the switching device Q2 is controlled to be switched on, and the depletion type MOS tube Q1 is in a second conduction state; the conduction degree of the depletion type MOS tube Q1 in the first conduction state is greater than that of the depletion type MOS tube Q1 in the second conduction state; in an implementation situation, the monitoring circuit may be arranged to monitor the voltage across the first circuit to obtain the voltage across the first circuit in real time, and transmit real-time voltage information to the MCU, and then the MCU controls the on/off of the switching device Q2 according to the real-time voltage information, and a person skilled in the art may set a preset voltage value for the on/off of the switching device Q2 according to actual needs, for example, the voltage value across the first circuit when the drain-source current Ids of the depletion type MOS transistor reaches Idss is used as the preset voltage value, or the preset voltage value is calculated according to the energy required to maintain a single-live-wire device.
Based on the characteristics of the depletion type MOS tube, the conduction degree of the depletion type MOS tube Q1 is controlled by the disconnection and conduction of the switching device Q2, when the voltage at the two ends of the first circuit is in a high-voltage interval, the current of the first circuit falls back to a lower position by adjusting the first conduction state of the depletion type MOS tube Q1 to be switched to the second conduction state, and the overall power consumption of the current adjusting circuit can be reduced. The utility model reduces the power consumption of the current regulating circuit while avoiding the flicker or the slight brightness of the light source load.
Based on the characteristics of the depletion type MOS tube, the single-live-wire switch can be powered most of the time in each period of the power frequency alternating current, the problem that a light source load flickers or is slightly cool when the high-power single-live-wire switch is applied is solved, and more light source loads with different powers can be compatible.
In the first circuit of this embodiment, the zener diode ZD1 is added to stabilize the current flowing through the first circuit to supply power to the single live wire switch, so as to reduce power consumption, and to make the current increase or decrease smoothly, thereby avoiding the phenomenon that the light source load may flicker or slightly light when in an off state, it should be noted that, as shown in fig. 4, because the zener diode ZD1 is added, because the zener diode ZD1 has a certain breakdown voltage, the first circuit is not turned on yet in a short time after the voltage is zero, and the value of Ids is zero, so the stage voltage is lower, the current flowing through the light source load is slight, and will not flicker or slightly light, and at the same time, the overall power consumption of the adjusting circuit itself is also reduced.
Based on the characteristics of the depletion type MOS tube, according to the power taking requirements of different single-live-wire switches, a voltage stabilizing diode ZD1 with a specific model is added in the first circuit, a voltage stabilizing diode ZD2 with a specific model is added in the second circuit, the conduction degree of the depletion type MOS tube Q1 is controlled and the voltage Ugs of the depletion type MOS tube Q1 is kept at a specific value within a higher voltage range of each period of power frequency alternating current, so that the current flowing through the first circuit is kept at the specific value to supply power for the single-live-wire switch, and the power consumption can be further reduced; specifically, when a circuit flowing through the depletion type MOS transistor is in a constant current region, the drain-source current Ids is almost determined by Ugs, and the source potential Q1s and the gate potential Q1g of the depletion type MOS transistor are stabilized by the zener diode ZD1 and the zener diode ZD2, respectively, so as to stabilize the value of Ugs (Ugs is Q1g-Q1s), and further stabilize the current value falling back in the high voltage region, thereby avoiding the light source load from flickering or slightly brightening in the off state due to the fluctuation of current at this stage, and also reducing the power consumption of the current regulating circuit.
In another case of this embodiment, different kinds of single-live-wire switches have different power consumptions due to different power modules such as a single-live-wire switch with three different communication modules including WIFI, bluetooth, and Zigbee, for example, different power consumptions of the single-live-wire switch with three different communication modules including WIFI, bluetooth, and Zigbee are different, in a case where resistance values of R1 and Q2 are fixed, a combination of zener diode ZD1 and zener diode ZD2 is selectively selected to match a corresponding kind of single-live-wire switch, specifically, in a state where Q2 is turned on, values of Ugs are different, for example, a single-live-wire switch of a WIFI module (set as a first module) takes a large current, and a second conduction state of a depletion type MOS transistor is controlled by a combination of first zener diodes (a difference between breakdown voltages (ZD1 and ZD2 (Uzd2-Uzd1) is small and set as a first threshold) so that drain source current Ids falls back to a higher position (set as a first position), ids value in the constant current interval when Ugs ═ 1V, for example; for another example, a single live wire of the bluetooth module (which is set as the second module) draws a small current, and the second conduction state of the depletion type MOS transistor is controlled by the combination of the second zener diodes (the difference between breakdown voltages (Uzd2-Uzd1) of ZD1 and ZD2 is large, and is set as the second threshold), so that the drain-source current Ids falls back to a lower position (set as the second position), for example, the Ids value in the constant current interval when Ugs is-3V; for another example, a single live wire switch of the Zigbee module (which is set as the third module) takes current between the Wifi module and the bluetooth module, and the second conduction state of the depletion type MOS transistor is controlled by a combination of the third zener diodes (the difference between the breakdown voltages (Uzd2-Uzd1) of ZD1 and ZD2 is centered, and is set as the third threshold), so that the drain-source current Ids falls back to the centered position (set as the third position), for example, the Ids value in the constant current section when Ugs is-2V.
Example 2
In this embodiment, on the basis of embodiment 1, the current regulation circuit further includes a third circuit, and the third circuit is connected to the second circuit and is used for controlling on/off of the switching device Q2 in the second circuit, as shown in fig. 2, which is a schematic diagram of the current regulation circuit in this embodiment. As can be seen from fig. 2, the third circuit includes resistors R3 and R4 and a zener diode ZD3, the zener diode ZD3 is connected to the input terminal of the current regulating circuit, the zener diode ZD3 is connected in series with the resistor R3 and the resistor R4 in turn, the control electrode of the switching device Q2 is connected between the resistor R3 and the resistor R4, the resistor R4, the resistor R1 and the switching device Q2 are connected to the output terminal of the current regulating circuit, and preferably, the reverse breakdown voltage of the zener diode ZD3 is greater than the reverse breakdown voltage of the zener diode ZD 1.
FIG. 4 shows an AC voltage-current waveform according to an embodiment of the present invention. When the voltage Vac on the current regulating circuit rises from zero and reaches a first threshold value, the zener diode ZD1 breaks down in the reverse direction to conduct, so that the depletion type MOS transistor Q1 is completely conducted and is in a variable resistance region state because the source voltage Q1s of the depletion type MOS transistor Q1 is equal to the gate voltage Q1g, and the resistor R1 is connected, and a current flows through the depletion type MOS transistor Q1, the zener diode ZD1 and the resistor R1 to form a loop, so that a loop current Ids is generated; when the depletion type MOS transistor Q1 is in the variable resistance region state, the loop current Ids gradually increases with the increasing of the voltage Vac, and if the loop current Ids reaches the saturated conduction current Idss of the depletion type MOS transistor Q1, the depletion type MOS transistor Q1 enters the constant current state, so the maximum value of the loop current Ids is Idss.
When the voltage Vac continues to rise and reaches the second threshold (the first circuit reaches the preset voltage), the zener diode ZD3 is in reverse breakdown conduction, and the switching device Q2 is turned on, so that the gate voltage Q1g of the depletion type MOS transistor Q1 is equal to the breakdown voltage g of the zener diode ZD g plus the conduction voltage drop Uq g of the switching device Q g, that is, Q1g is equal to g + Uq g, the source voltage Q1g of the depletion type MOS transistor Q g is equal to the breakdown voltage g of the zener diode ZD g plus the voltage drop Ur g of the resistor R g, that is, Q1g is equal to g + Ur g, the electronic element of the present invention selects the model g + Ur g > g + Q g, so that the source voltage Q1 of the depletion type MOS transistor Q g is greater than the gate voltage Q1g, that the driving voltage Ugs g of the depletion type MOS transistor Q g is equal to Q1-g, that the depletion type MOS g, that is in the depletion type MOS g, that the drain type MOS g is in the state of the drain type MOS g, that Q g is less than the drain type Q g, and the drain current is less than the conduction of the drain type of the transistor Q g, and the transistor g, and the drain type is completely broken state g, and the drain type Q g is less than the drain type of the drain type Q g.
When the voltage Vac decreases to the second threshold (the first circuit reaches the preset voltage), the zener diode ZD3 is turned off, so that the switching device Q2 is turned off, the zener diode ZD2 is turned off, the depletion type MOS transistor Q1 is completely turned on, the depletion type MOS transistor Q1 is in the variable resistance region state, and the loop current Ids increases instantaneously. As the voltage Vac continues to decrease, the loop current Ids also gradually decreases.
When the voltage Vac continues to decrease and reaches the first threshold, the zener diode ZD1 turns off and the loop current Ids is zero. As the voltage Vac continues to decrease and returns to zero. The variation of the overall process voltage Vac as a function of the loop current Ids is clearly shown in fig. 4. In the present embodiment, the respective threshold values of the depletion type MOS transistor Q1 are set by the values of the resistors R1, R2, R3, and R4.
According to the power taking requirements of different single-live-wire switches, a voltage stabilizing diode ZD1 with a specific model is used in a first circuit, a voltage stabilizing diode ZD2 with a specific model is used in a second circuit and a voltage stabilizing diode ZD3 with a specific model is used in a third circuit, and in a specific high-voltage range (the range from the reverse breakdown voltage of the voltage stabilizing diode ZD3 to the maximum voltage value) of each period of the power frequency alternating current, the grid source voltage Ugs of a depletion type MOS tube Q1 keeps a specific value (determined by the reverse breakdown voltage difference value of the voltage stabilizing diode ZD1 and the voltage stabilizing diode ZD 2), so that the current flowing through the first circuit keeps the specific value to supply power for the single-live-wire switch, and the power consumption can be further reduced; the present embodiment sets, by diode ZD3 having a preset reverse breakdown voltage value, that when the voltage value across the first circuit is lower than a preset voltage value (reverse breakdown voltage value of ZD 3), Q2 is controlled to be in the off state; when the voltage value across the first circuit reaches or exceeds the preset voltage value (the reverse breakdown voltage value of ZD 3), the turn-on of the switching device Q2 can be controlled, so that the current of the first circuit falls back to a lower position.
It should be noted that in this embodiment, the third circuit is additionally provided with the zener diode ZD3, the breakdown voltage of the zener diode ZD3 is greater than that of the zener diode ZD1, and the on/off of the switching device Q2 is automatically controlled through the action of the diode ZD3, so that the Q1 of the depletion type MOS transistor can be automatically adjusted to be in different on states according to the change of Vac, the on/off of the switching device Q2 does not need to be additionally controlled through an MCU program, and the software and hardware costs are reduced.
According to the power supply requirements of different single-live-wire switches, voltage stabilizing diodes ZD1, ZD2 and ZD3 of specific models are selected, and larger loop current can be provided within a specific low-voltage range of each period of power frequency alternating current to supply power for the single-live-wire switches, so that the phenomenon that a light source load is likely to flicker or slightly brighten when the light source load is in a closed state is avoided, the loop current which is steadily increased and reduced is provided, the power is supplied for the single-live-wire switches, and the phenomenon that the current fluctuation is large and the light source load flickers or slightly brightens and the power consumption is reduced are avoided; within the specific high-voltage range of each period of the power frequency alternating current, the loop current with the specific value is provided to charge the single live wire switch, namely, after the voltage rises, the small constant loop current is provided, and the power consumption is further reduced.
In embodiments 1 and 2, as shown in fig. 2, the current regulating circuit may further include a fuse F and a rectifying module, where an input end of the current regulating circuit is connected to the fuse and the rectifying module, where the rectifying module may include a rectifier bridge BD or a diode or other electronic components with a rectifying function, and the ac voltage is rectified by the rectifier bridge BD to be converted from the original ac power to a dc power.
The current regulating circuit is a capacitor-free inductance circuit, and the compensation of the light source load is realized in the zero-crossing detection. During zero-crossing detection, because the single live wire switch is only connected to the live wire, the voltage zero-crossing point detected by the single live wire switch is distorted due to the influence of a light source load with an inductive or capacitive path. The utility model utilizes the capacitor-free inductance circuit design to compensate the distortion of the voltage zero-crossing detection, and the single live wire switch zero-crossing detection is more accurate.
Example 3
In embodiments 1 and 2, the current regulation circuit of the present invention is explained in detail. In this embodiment, a single-live-wire switch power supply circuit is described in detail, and includes a lamp, a single-live-wire switch, and a current regulation circuit, where the lamp includes a light source driving circuit and a light source load, the light source driving circuit is disposed inside the lamp, the single-live-wire switch is connected in series with the lamp, and the current regulation circuit is the current regulation circuit in the foregoing and is connected in parallel with the light source driving circuit. This single live wire switch supply circuit can solve the problem that prior art exists at intelligent upgrading transformation in-process, and easy operation is convenient simultaneously, and is high-efficient, low cost.
Example 4
Based on the above embodiments, the present embodiment provides a lamp. The lamp application block diagram is shown in fig. 5. The lamp comprises a lamp body, wherein a light source driving circuit and the current regulating circuit are arranged in the lamp body, and the light source driving circuit is connected with the current regulating circuit in parallel. Or the lamp is designed to comprise a lamp body and an adapter, a light source driving circuit is arranged in the lamp body, the adapter is provided with the current adjusting circuit in the front, the adapter is detachably installed on the lamp body and used for installing the lamp body on a lamp holder, and when the adapter is installed on the lamp body, the light source driving circuit is connected with the current adjusting circuit in parallel. In the intelligent upgrading and transformation process, the lamp provided by the utility model can be used for replacing the original lamp, and the intelligent upgrading and transformation method is simple and convenient to operate, high in efficiency and low in cost.
As shown in fig. 5, the input terminal of the single live wire switch is connected to the ac live wire ACL, the output terminal Lout of the single live wire switch is connected to the input terminal of the present invention, and the output terminal of the present invention is connected to the ac neutral wire ACN. When the circuit power supply is switched on, the current regulating circuit supplies power to the single live wire switch through the zero line, the current regulating circuit is connected with the light source driving circuit in parallel, most of current supplied by the single live wire flows through the current regulating circuit, and only a tiny part of the current flows through the light source driving circuit, so that the light source load of the utility model can not generate a ghost fire phenomenon under the condition that the single live wire switch closes the output of the light source load. Meanwhile, the current regulating circuit has no capacitance and inductance, does not interfere with the AC zero sampling of the single live wire switch, and improves the zero accuracy, so that the lamp flash phenomenon cannot occur in the dimming process.
Example 5
As shown in fig. 6, which is a block diagram of the lamp system of the present invention, an input end of the single live wire switch is connected to the ac live wire ACL, an output end Lout of the single live wire switch is connected to an input end of the lamp system of the present invention, and an output end of the lamp system is connected to the ac neutral wire CAN. As shown in fig. 6, the lamp system includes a first lamp and at least one second lamp, the first lamp includes a light source driving circuit and a current regulating circuit in embodiment 1 or embodiment 2, wherein the first lamp is connected in parallel with the at least one second lamp, and the light source driving circuit of the first lamp is connected in parallel with the current regulating circuit.
When the circuit power supply is switched on, the current regulating circuit of the utility model supplies power to the single live wire switch through the zero line, the first lamp is connected with other lamps in parallel, the current regulating circuit in the first lamp is connected with the light source driving circuit in parallel, most of the current supplied by the single live wire flows through the current regulating circuit of the first lamp, and the light source driving circuit of the first lamp and other lamps only have a very small part, so that the lamp system of the utility model can not generate ghost fire phenomenon when the single live wire switch is in a state of closing the lamp system.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (11)
1. A current regulation circuit for a single hot wire device, comprising: a first circuit and a second circuit connected to each other;
the first circuit comprises a depletion type MOS tube Q1 and a resistor R1, wherein the depletion type MOS tube Q1 is connected with the resistor R1 in series;
the second circuit comprises a resistor R2 and a switching device Q2, wherein the resistor R2 is connected with the switching device Q2 in series;
the gate of the depletion type MOS transistor Q1 is connected between the resistor R2 and the switching device Q2, the drain of the depletion type MOS transistor Q1 and the resistor R2 are connected to the input end of the current regulation circuit, the source of the depletion type MOS transistor Q1 and the switching device Q2 are connected to the output end of the current regulation circuit, and the switching device Q2 is used for controlling the conduction degree of the depletion type MOS transistor Q1, so as to adjust the magnitude of the current flowing through the first circuit;
when the voltage across the first circuit is lower than a preset voltage, the switching device Q2 is turned off, and the depletion type MOS transistor Q1 is turned on and then is in a first conducting state; when the voltage across the first circuit reaches or exceeds a preset voltage, the switching device Q2 is conducted, and the depletion type MOS tube Q1 is in a second conduction state; the conduction degree of the depletion type MOS tube Q1 in the first conduction state is larger than that of the depletion type MOS tube Q1 in the second conduction state.
2. The current regulation circuit according to claim 1, wherein the first circuit further comprises a zener diode ZD1, and the source of the depletion type MOS transistor Q1, the zener diode ZD1 and the resistor R1 are connected in series in this order.
3. The current regulation circuit according to claim 2, wherein the second circuit further comprises a zener diode ZD2, the resistor R2, the zener diode ZD2 and the switching device Q2 are sequentially connected in series, and the gate of the depletion type MOS transistor Q1 is connected between the resistor R2 and the zener diode ZD 2.
4. The current regulating circuit according to claim 3, wherein the reverse breakdown conduction voltage of zener diode ZD2 is less than the reverse breakdown conduction voltage of zener diode ZD 1.
5. The current regulating circuit according to claim 2, further comprising a third circuit connected to the second circuit for controlling the on/off of the switching device Q2.
6. The current regulation circuit of claim 5 wherein the third circuit comprises resistors R3, R4, zener diode ZD3, the reverse breakdown voltage of zener diode ZD3 being greater than the reverse breakdown voltage of zener diode ZD 1;
the voltage stabilizing diode ZD3 is connected with the input end of the current regulating circuit, the voltage stabilizing diode ZD3 is sequentially connected with the resistor R3 and the resistor R4 in series, the control electrode of the switching device Q2 is connected between the resistor R3 and the resistor R4, and the resistor R4, the resistor R1 and the switching device Q2 are connected with the output end of the current regulating circuit.
7. The current regulating circuit of claim 1, wherein the switching device Q2 is a triode or enhancement MOS transistor.
8. The current regulating circuit according to any one of claims 1-7, further comprising a fuse and a rectifying module, wherein the input of the current regulating circuit is connected to the fuse and the rectifying module.
9. A single fire wire device power supply circuit, comprising:
the lamp is internally provided with a light source driving circuit;
a single live wire device connected in series with the light fixture for controlling the light fixture;
the current regulating circuit of any one of claims 1 to 7, connected in series with the single hot line device and arranged in parallel with the light source driving circuit.
10. A lamp, characterized in that the lamp comprises a lamp body, the current regulating circuit and the light source driving circuit of any one of claims 1 to 7 are arranged in the lamp body, and the current regulating circuit and the light source driving circuit are arranged in parallel; or, the lamp includes a lamp body and an adapter, the adapter is detachably mounted on the lamp body, and is used for mounting the lamp body on a lamp holder, a light source driving circuit is arranged inside the lamp body, the adapter is provided with the current adjusting circuit according to any one of claims 1 to 8, and when the adapter is mounted on the lamp body, the current adjusting circuit and the light source driving circuit are arranged in parallel.
11. A light fixture system comprising a first light fixture and at least one second light fixture, at least one of said second light fixture being connected in parallel with said first light fixture, said first light fixture having a current regulation circuit and a light source driver circuit as claimed in any one of claims 1 to 7 disposed therein, said current regulation circuit and said light source driver circuit being disposed in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122854656.8U CN216626118U (en) | 2021-11-19 | 2021-11-19 | Current regulating circuit, power supply circuit, lamp and system for single live wire equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122854656.8U CN216626118U (en) | 2021-11-19 | 2021-11-19 | Current regulating circuit, power supply circuit, lamp and system for single live wire equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216626118U true CN216626118U (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122854656.8U Active CN216626118U (en) | 2021-11-19 | 2021-11-19 | Current regulating circuit, power supply circuit, lamp and system for single live wire equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216626118U (en) |
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2021
- 2021-11-19 CN CN202122854656.8U patent/CN216626118U/en active Active
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