CN113014082A - Low-power-consumption standby power supply, circuit, control method and intelligent product - Google Patents
Low-power-consumption standby power supply, circuit, control method and intelligent product Download PDFInfo
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Abstract
The invention relates to a low-power consumption standby power supply, a circuit, a control method and an intelligent product. Wherein, this power includes: the power supply module is used for outputting a set value of power supply voltage; the main control module receives the power supply voltage and outputs a judgment signal according to an acquisition signal; and the silicon controlled control module is electrically connected with the main control module, receives the power-taking live wire and controls the on-off of the load according to the STB signal. The master control module outputs a judgment signal to control the on-off of the silicon controlled rectifier, so that the on-off of the power-taking live wire is completed, the disconnection of an input power supply is realized, the problem of overlarge power consumption of a standby power supply in the prior art is effectively solved, and the purpose of energy saving after standby is realized; meanwhile, in a standby state, the main control module can realize uninterrupted power supply so as to wake up the equipment at any time.
Description
Technical Field
The invention belongs to the technical field of power supplies, and particularly relates to a low-power-consumption standby power supply, a circuit, a control method and an intelligent product.
Background
With the appearance and development of intelligent products, the problem of high standby power consumption of the intelligent products is more and more obvious, and in the prior art, the intelligent products have higher power consumption in a standby state for various reasons.
At present, no effective solution is provided for the problem of high power consumption in a standby state in the related art.
Disclosure of Invention
In order to solve the problems, the invention provides a low-power-consumption standby power supply, a control method, an intelligent product and a power supply controller.
In a first aspect, an embodiment of the present application provides a low power consumption standby power supply, including:
the power supply module is used for outputting a set value of power supply voltage;
the main control module receives the power supply voltage and outputs a judgment signal according to an acquisition signal;
and the silicon controlled control module is electrically connected with the main control module, receives the judgment signal and controls the on-off of the power taking live wire and the load according to the judgment signal.
In some embodiments, the judgment signal is set as an STB signal, and the silicon controlled control module receives and controls the power-taking live wire and the load to be switched on and off according to the STB signal.
In some embodiments, the power supply module includes a main power supply unit and an auxiliary power supply unit, wherein the main power supply unit is used for supplying power to a load, the auxiliary power supply unit is used for supplying power to the main control module, and a power taking end of the auxiliary power supply unit is located at a front end of an electric connection position of the silicon controlled rectifier control module and the power taking live wire.
In some of these embodiments, the auxiliary power unit further comprises: the power supply comprises a first rectifying and filtering circuit, a voltage division circuit, an RCD absorption circuit, a flyback transformer and a secondary Schottky rectifying and filtering circuit which are electrically connected, wherein the secondary Schottky rectifying and filtering circuit is electrically connected with the main control module.
In some embodiments, the main control module further includes a second rectifying and filtering circuit, a zero-crossing detection circuit, and a wireless module, wherein the second rectifying and filtering circuit is connected in parallel with the zero-crossing detection circuit, the wireless module includes an MCU and a wireless communication module electrically connected to the MCU, and the wireless communication module is electrically connected to the scr control module through an STB port.
In some embodiments, the wireless communication module is configured as one or a combination of WiFi and bluetooth.
In some embodiments, the thyristor control module further comprises a switch circuit and a thyristor, which are connected in series with the wireless module, and the thyristor is electrically connected with the power-taking live wire.
In some embodiments, the on-off circuit further includes a noise reduction circuit and an optical coupler, the noise reduction circuit is electrically connected to the STB port of the wireless module, and output pins of the optical coupler are respectively connected to A, G pins of the thyristor.
In some embodiments, the on-off of the power-taking live wire and the load is controlled to be on-off of the power-taking live wire and the main power supply unit.
In a second aspect, an embodiment of the present application further provides a low power consumption control method, where a low power consumption standby power supply according to the first aspect is applied, and the method includes the following steps:
a power supply step, namely, passing the alternating current accessed by the power grid through a first rectification filter circuit through a power-taking live wire to generate stable power supply voltage and outputting the stable power supply voltage;
a signal output step, which is used for receiving the power supply voltage through a main control module and outputting an STB signal according to an acquisition signal;
and a circuit control step, which is used for receiving the power-taking live wire and controlling the on-off of the load according to the STB signal through a silicon controlled control module, so as to realize the low-power standby.
In some embodiments, the main control module is specifically configured as a wireless module, the signal output step further includes a signal determination step,
the wireless module is connected with a communication module, distinguishes different control states according to the characteristics corresponding to the acquired signals and outputs signals corresponding to the STB.
In some embodiments, the circuit controlling step specifically includes:
a signal pull-up step, wherein the wireless module is connected with a resistor R15 and a resistor R16 through a GPIO port to realize pull-up/pull-down of STB signals;
and a circuit switching-on/switching-off step, wherein the controlled silicon receives and controls the switching-on/switching-off state of a control electrode G of the STB according to the high/low level of the STB signal so as to realize the switching-on/switching-off of the power-taking live wire.
In some embodiments, the circuit turning on/off step further comprises:
when the STB signal is at a high level, an optical coupler is conducted in a forward direction, an electric signal is transmitted to the control electrode G, when the GK of the silicon controlled rectifier is at a forward voltage and is greater than a gate trigger voltage, the control electrode G is triggered, the AK of the silicon controlled rectifier is conducted, and the power-taking line is conducted;
when the STB signal is the low level, the opto-coupler forward blocks, and the signal of telecommunication can't be transmitted, the silicon controlled rectifier does not have the trigger, and AK is in the off-state, cuts off get the live wire.
In some of these embodiments, the powering step further comprises:
a first rectifying and filtering step of inputting the alternating current accessed through the power-taking live wire to a first rectifying and filtering circuit to output a starting voltage to a power chip;
a voltage division step, namely dividing the voltage through an FB port of the power supply chip;
a voltage transformation step, namely outputting the actually required power supply voltage through a flyback transformer;
and a second rectifying and filtering step, wherein the power supply voltage is output by a secondary Schottky rectifying and filtering circuit to be stable.
In a third aspect, an embodiment of the present application further provides a low power consumption standby circuit, which is applied to the low power consumption control method in the second aspect, and includes:
a main control module;
the silicon controlled rectifier control module is electrically connected with the main control module and is connected into the power grid system in series through an SW1 port;
the auxiliary power supply unit is used for supplying power to the main control module and is electrically connected with the power grid system, and the power taking end of the auxiliary power supply unit is arranged at the front end of the SW1 port;
the main control module receives an acquisition signal and then outputs an STB signal to the controlled silicon control module, and the controlled silicon control module is switched on and off through an SW1 port.
In some embodiments, the power supply system further comprises a main power supply unit electrically connected to the power grid system for supplying power to the load.
In some embodiments, the thyristor control module further comprises:
the on-off circuit is electrically connected with the main control module through an STB port;
the silicon controlled rectifier is electrically connected with the on-off circuit and is connected in series with a power taking live wire connected into the power grid system;
the on-off circuit receives and controls the on-off of the on-off circuit according to the STB signal, and then the on-off of the power-taking live wire is controlled through the silicon controlled rectifier.
In some embodiments, the auxiliary power unit further comprises: the first rectifying and filtering circuit, the bleeder circuit, the RCD absorption circuit, the flyback transformer, the secondary Schottky rectifying and filtering circuit that the electric connection, secondary Schottky rectifying and filtering circuit electric connection master control module.
In some embodiments, the main control module further includes a second rectifying and filtering circuit, a zero-crossing detection circuit, and a wireless module, wherein the second rectifying and filtering circuit is connected in parallel with the zero-crossing detection circuit, the wireless module includes an MCU and a wireless communication module electrically connected to the MCU, and the wireless communication module is electrically connected to the on-off circuit through an STB port.
In some embodiments, the wireless communication module is configured as one or a combination of WiFi and bluetooth.
In some embodiments, the on-off circuit further includes a noise reduction circuit and an optical coupler, the noise reduction circuit is electrically connected to the STB port of the wireless module, and output pins of the optical coupler are respectively connected to A, G pins of the thyristor.
In a fourth aspect, an embodiment of the present application provides a smart product, including the low power consumption standby power supply of the first aspect,
the low-power consumption standby power supply can also be externally connected with a WiFi intelligent gateway, an APP or a Bluetooth remote controller and is electrically connected with the main control module.
In a fifth aspect, an embodiment of the present application provides a power supply controller, which includes the low power consumption standby power supply of the first aspect.
In a sixth aspect, an embodiment of the present application provides a ceiling lamp, including the low power consumption standby power supply and the lighting component described in the first aspect.
In summary, the embodiment of the application provides a low-power-consumption standby power supply, a circuit, a control method and an intelligent product, wherein the main control module outputs an STB (set top box) signal to control the on-off of a thyristor, so that the on-off of a power-taking live wire is completed, the disconnection of an input power supply is realized, the problem of overlarge power consumption of the standby power supply in the prior art is effectively solved, and the purpose of energy saving after standby is realized; meanwhile, in a standby state, the main control module can realize uninterrupted power supply so as to wake up the equipment at any time.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a block diagram of a low power standby power supply;
FIG. 2 is a schematic diagram of a main power supply unit;
FIG. 3 is a schematic diagram of an auxiliary power unit;
FIG. 4 is a schematic circuit diagram of a master control module;
FIG. 5 is a schematic diagram of a thyristor control module;
FIG. 6 shows the operation of thyristor Q7;
FIG. 7 is an internal structural view of the thyristor;
FIG. 8 is a functional block diagram of a ceiling system in accordance with a preferred embodiment of the present invention;
fig. 9 is a block diagram of a low power consumption standby circuit according to an embodiment of the present application;
FIG. 10 is a flow chart of a low power control method;
FIG. 11 is a flow chart of the power supply steps in the embodiment of the present application
Fig. 12 is a flowchart of a circuit control procedure in the embodiment of the present application.
Wherein the reference numerals are:
a power supply module 1; a main control module 2; a silicon controlled control module 3;
a main power supply unit 11; an auxiliary power supply unit 12; a first rectifying-filtering circuit 121;
a voltage divider circuit 122; the RCD snubber circuit 123; a flyback transformer 124;
a secondary schottky rectifying filter circuit 125; a second rectifying/smoothing circuit 21;
a zero-cross detection circuit 22; a wireless module U1; an on-off circuit 31; a thyristor Q7;
a noise reduction circuit 311; an optical coupler PC 2; auxiliary power supply AC/DC module 801;
a WIFI module 802; a zero-crossing detection module 803; a thyristor module 804;
a rectifier bridge 805; a main power PFC module 806; a constant voltage output module 807;
FIG. 9:
a master control module 902; a thyristor control module 903;
an auxiliary power supply unit 9012; a main power supply unit 9011;
an on-off circuit 9031; a thyristor Q7;
a first rectifying and filtering circuit 90121; a voltage divider circuit 90122;
RCD absorption circuit 90123; a flyback transformer 90124;
a secondary schottky rectifying filter circuit 90125; (ii) a A second rectifying and filtering circuit 9021;
a zero-crossing detection circuit 9022; a wireless module U1;
a noise reduction circuit 90311; optical coupler PC 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments provided in the present application without any inventive step are within the scope of protection of the present application.
It is obvious that the drawings in the following description are only examples or embodiments of the present application, and that it is also possible for a person skilled in the art to apply the present application to other similar contexts on the basis of these drawings without inventive effort. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.
Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of ordinary skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments without conflict.
The exemplary embodiments of the present invention and the description thereof are provided to explain the present invention and not to limit the present invention. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.
Unless defined otherwise, technical or scientific terms referred to herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which this application belongs. Reference to "a," "an," "the," and similar words throughout this application are not to be construed as limiting in number, and may refer to the singular or the plural. The present application is directed to the use of the terms "including," "comprising," "having," and any variations thereof, which are intended to cover non-exclusive inclusions; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to the listed steps or elements, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Reference to "connected," "coupled," and the like in this application is not intended to be limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as referred to herein means two or more; reference to "multiple sets" herein includes "two sets" and "more than two sets". "and/or" describes an association relationship of associated objects, meaning that three relationships may exist, for example, "A and/or B" may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. Reference herein to the terms "first," "second," "third," and the like, are merely to distinguish similar objects and do not denote a particular ordering for the objects.
As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. Generally, the range of slight variations or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.
Certain words used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present application.
In the prior art, the standby power of many intelligent products is higher, mainly because the consumption of power and the consumption of host system piece of power, under the standby state, host system piece can't cut off the power, and host system piece need get the electricity from the power, because do not realize completely under the standby state that control input end cuts off the power, leads to the power to be in operating condition all the time, and the consumption is higher.
The first embodiment is as follows:
therefore, the embodiment of the application provides a low-power-consumption standby power supply, which can realize that the main control module is not powered off and the input power supply is in a power-off state in a standby state so as to achieve the purpose of reducing power consumption. As used hereinafter, the terms "module," "unit," "subunit," and the like may implement a combination of software and/or hardware for a predetermined function. Although the system described in the embodiments below is preferably implemented in hardware, implementations in software, or a combination of software and hardware are also possible and contemplated.
Fig. 1 is a structural framework diagram of a low-power consumption standby power supply, as shown in fig. 1, the low-power consumption standby power supply specifically includes a power supply module 1, a main control module 2 and a thyristor control module 3, wherein:
the power supply module 1 is used for outputting a set value of power supply voltage;
the main control module 2 receives the power supply voltage and outputs a judgment signal according to an acquisition signal;
the silicon controlled control module 3 is electrically connected with the main control module 2, and the silicon controlled control module 3 receives and controls the on-off of the power-taking live wire and the load according to the judgment signal.
The above signal acquisition means that the main control module communicates with the external antenna UART and outputs the acquired signal through data input. The main control module can support different control states according to different collected signals.
In some embodiments, the determination signal is set as an STB signal, and the thyristor control module 2 receives and controls the power line and the load to be switched on and off according to the STB signal.
In this application embodiment, power module 1 provides voltage for host system 2 and load, and power live wire is got in power module 1's input connection, and host system 2 receives output STB signal to silicon controlled control module 3 after gathering the signal, and silicon controlled control module 3 gets the break-make of power live wire and load according to STB signal control input. Therefore, the power consumption reaches 1w or below in the standby state.
It should be noted that, when the silicon controlled control module 3 controls the power-taking live wire to be disconnected, the power supply module 1 is not affected by the power supply function of the main control module 2, so as to achieve the state that the main control module can be waken up at any time in the standby state.
In some embodiments, the power supply module 1 includes a main power supply unit 11 and an auxiliary power supply unit 12, wherein the main power supply unit 11 is used for supplying power to a load, the auxiliary power supply unit 12 is used for supplying power to the main control module 2, and a power taking end of the auxiliary power supply unit 12 is located at a front end of an electrical connection position of the thyristor control module 3 and the power taking live wire.
It should be noted that the front end is a side of the thyristor control module 3 electrically connected to the power-taking live wire and close to the power supply.
In practical applications, fig. 2 is a schematic diagram of a circuit principle of a main power supply unit, as shown in fig. 2, the main power supply unit 11 is electrically connected to a live line and a zero line of a power grid system, and includes an AC/DC conversion circuit and a transformer, the main power supply unit 11 is provided with three ports, which are SW1, SW2 and SW3, respectively, SW1 and SW2 are connected to an A, K port of a thyristor Q7 of the thyristor control module 3, the thyristor control module 3 is connected in series to the main power supply unit 11 to control a power supply condition of the thyristor control module 3 after the SW1 end, a front end of the SW1 port is further connected to the auxiliary power supply unit 12, so that when the thyristor control module 3 controls the SW1 and the SW2 to be disconnected, the auxiliary power supply unit 12 can normally supply power to the main power supply, and SW3 is used for supplying voltage to a working load.
In some embodiments, the power supply line and the load are controlled to be switched on and off, and the power supply line and the main power supply unit 11 are controlled to be switched on and off.
In some embodiments, the auxiliary power unit 12 further includes: the first rectifying and filtering circuit 121, the voltage dividing circuit 122, the RCD absorption circuit 123, the flyback transformer 124, and the secondary schottky rectifying and filtering circuit 125 are electrically connected, and the secondary schottky rectifying and filtering circuit 125 is electrically connected to the main control module 2.
Fig. 3 is a schematic diagram of an auxiliary power supply unit, as shown in fig. 3, ac power accessed by a power grid system is input through a live wire/zero wire, the ac power is connected with a live wire and enters a whole low-power standby power supply through a SW1, the dc power is rectified into dc power through a diode D17, and is filtered through a capacitor EC7, a capacitor EC7 is connected in parallel with resistors R47 and R46 to provide a starting voltage for a power chip U10, a capacitor C43 and a capacitor C40 are set as a filter capacitor of a VDD pin of the power chip U10, an RCD absorption circuit is formed by the capacitor, the resistor and the diode, the RCD absorption circuit is connected in parallel with a T2A section, the power chip U10 is further connected with an auxiliary circuit, the auxiliary circuit is formed by a resistor R50 and a diode D20 connected in series in this embodiment, a FB pin of the power chip U10 is divided to obtain a rear end voltage, a FB pin is connected with a resistor R7378 and a resistor R6866, the other end T2C section of the flyback transformer is connected with a rectifying filter circuit and an absorption circuit and is connected with a dummy load, and finally 3.3V voltage is output to supply power for the wireless module.
In some embodiments, the main control module 2 further includes a second rectifying and filtering circuit 21, a zero-crossing detection circuit 22, and a wireless module U1, wherein the second rectifying and filtering circuit 21 is connected in parallel with the zero-crossing detection circuit 22, the wireless module U1 includes a MCU and a wireless communication module electrically connected to the MCU, and the wireless communication module is electrically connected to the scr control module 3 through a STB port.
Fig. 4 is a schematic circuit diagram of the main control module, as shown in fig. 4, the main control module includes a second rectifying and filtering circuit 21, a zero-cross detection circuit 22 and a wireless module U1, the second rectifying and filtering circuit 21 and the zero-cross detection circuit 22 are connected in parallel, the wireless module U1 is connected in series with a resistor R15 and a resistor R16 at an IO22 pin in a GPIO manner, so as to pull up an STB signal, an STB port is connected with the thyristor control module, and the conduction and the blocking of a control electrode G of the thyristor Q7 are controlled according to the change of the high and low levels of the STB signal, so as to realize the fast connection of the contactless switch or the disconnection of a live wire SW1 and SW 2.
In practical applications, the wireless module U1 may be configured as one or a combination of WIFI and bluetooth. The wireless module U1 can communicate with the external antenna UART, collect different signals to support different control states through data input and output, and output STB signals to the scr control module 3.
In this application, through terminating the power consumption with bluetooth or wiFi before SW1, the input power of SW1 rear end can control the outage through bluetooth or WIFI under the standby state, does not influence bluetooth or wiFi's power supply simultaneously, and then reaches the purpose of reduce power consumption.
In some embodiments, the scr control module 3 further includes a switch circuit 31 and a thyristor Q7 connected in series with the wireless module U1, and the thyristor Q7 is electrically connected to the power line.
In some embodiments, the on/off circuit 31 further includes a noise reduction circuit 311 and an optical coupler PC2, the noise reduction circuit 311 is electrically connected to the STB port of the wireless module U1, and output pins of the optical coupler are respectively connected to the A, G pins of the thyristor Q7.
Fig. 5 is a schematic diagram of a thyristor control module, and as shown in fig. 5, in this embodiment, a wireless module U1 is used to support the realization of standby of an intelligent product, and a control electrode G of a thyristor Q7 is controlled to cut off power supply to an input power-taking live wire and to disconnect a rear-end output load, in response to H/L change of an STB signal, so as to achieve optimal standby power consumption. The method specifically comprises the following steps: when an STB signal is at an H high level, a pin 12 of the optical coupler PC2 is conducted in a forward direction, a pin 246 of the optical coupler PC is opened, an electric signal is transmitted to a control electrode G of the controlled silicon Q7, the conduction of the controlled silicon can be triggered only after a forward voltage is added to G, K, the minimum value of the trigger voltage is called a gate trigger voltage VGT, when a forward voltage is applied to GK of the controlled silicon Q7 and is larger than the gate trigger voltage VGT, a G point is triggered, AK is conducted, and SW1 is conducted with SW 2.
On the contrary, when the STB is at the L low level, the 12 pins of the optocoupler PC2 cannot be conducted in the forward direction, the electric signal transmission cannot be passed, the controllable silicon Q7 is not triggered, the AK is in the off state, and the live wires SW1 and SW2 are cut off.
In some embodiments, the low power consumption standby power supply may further be externally connected to a WiFi smart gateway, APP or a bluetooth remote controller, and all electrically connected to the main control module 2.
In the application of reality, low-power consumption standby power passes through external WIFI intelligent gateway, and APP and bluetooth remote control machine can realize that turn-off after the standby gets the electric live wire, control intelligent product standby power consumption, accomplish to turn-off and the on-line condition can awaken up intelligent product equipment at any time.
Fig. 6 is a working principle of a thyristor Q7, fig. 7 is an internal structure diagram of the thyristor, and on-off state of a power-taking live wire is controlled by using the thyristor based on the working principle of the thyristor and by using a contactless switch.
During the working process of the controllable silicon Q7, the anode A and the cathode K of the controllable silicon Q7 are connected with a power supply and a load to form a main circuit of the controllable silicon Q7, and the control electrode G and the cathode K of the controllable silicon Q7 are connected with a circuit for controlling the controllable silicon Q7 to form a control circuit of the controllable silicon Q7.
As shown in fig. 6-7, the thyristor Q7 is a four-layer three-terminal device having three PN junctions, and its middle NP is divided into two parts to form a composite tube of a PNP transistor Q1 and an NPN transistor Q2.
Internal analysis working process of thyristor Q7:
when the thyristor Q7 is subjected to positive anode voltage, the PN junction subjected to reverse voltage must be unblocked in order to turn on the thyristor Q7. The collector current of each transistor is simultaneously the base current of the other transistor. Thus, two transistor circuits, which are combined with each other, have sufficient gate current IgWhen the current flows in, strong positive feedback is formed, so that the two transistors are in saturated conduction, and the transistors are in saturated conduction.
The collector currents of the PNP tube and the NPN tube are set to be I correspondinglyc1And Ic2(ii) a Emitter current is correspondingly IaAnd Ik(ii) a Current amplification factor is a1＝Ic1/IaAnd a2＝Ic2/Ik。
Let the reverse leakage current flowing through the middle PN junction be Ic0The anode current of thyristor Q7 is equal to the sum of the collector current and the leakage current of the two transistors:
Ia＝Ic1+Ic2+Ic0or Ia＝a1Ia+a2Ik+Ic0
If the gate current is IgThen the cathode current of the thyristor Q7 is
Ik＝Ia+Ik
So that the anode current of the thyristor Q7 is:
I＝(Ic0+Iga2)/(1-(a1+a2)) (1-1)
the current amplification coefficients a of the silicon PNP tube and the silicon NPN tube1And a2Which changes sharply with changes in its emitter current.
When the SCR Q7 is under positive anode voltage and the gate is under no voltage, in the formula (1-1), Ig＝0,a1+a2Very small so that the anode current I of the thyristor Q7a≈Ic0The thyristor is in a forward blocking state. When the thyristor Q7 is under positive anode voltage, current I flows from the control electrode GgDue to a sufficiently large IgFlows through the emitter junction of the NPN tube, thereby improving the starting point flow amplification factor a2Generating a sufficiently large pole electrode current Ic2Flows through the emitter junction of the PNP tube and improves the current amplification factor a of the PNP tube1Generating a larger pole electrode current Ic1Flows through the emitter junction of the NPN transistor. This strong positive feedback process proceeds rapidly. When a is1And a2As the emitter current increases (a)1+a2) When 1 is applied, the denominator 1- (a) in the formula (1-1)1+a2) Is approximately equal to 0, so that the anode current I of the thyristor Q7 is improveda. At this point, the current through thyristor Q7 is determined entirely by the main loop voltage and the loop resistance. Thyristor Q7 is already in the forward conducting state.
In the formula (1-1), after the thyristor Q7 is turned on, 1- (a)1+a2) 0, even at the gate current IgWhen it is 0, the thyristor Q7 can still retain original anode current IaAnd continues to conduct. After the thyristor Q7 is turned on, the gate is deactivated.
After the thyristor Q7 is turned on, if the power voltage is continuously reduced or the loop resistance is increased, the anode current I is enabledaDecreases below the holding current IHDue to a1And a2Rapidly decrease when 1- (a)1+a2) When the value is approximately equal to 0, the thyristor Q7 restores the blocking state.
When the low-power-consumption standby power supply works, electricity is taken at the front end of the SW1 through the auxiliary power supply unit 12, alternating current is converted into 3.3V direct current through AC to DC, power is supplied to the wireless module U1, the wireless module U1 outputs STB signals through the resistor R15 and the resistor R16, and then the switch is disconnected to take electricity from the live wire by controlling the control electrode G of the silicon controlled rectifier Q7 through the PC2, and meanwhile, the load at the rear end is disconnected, so that the optimal standby power consumption is achieved.
As shown in the following table, it can be seen that the low power consumption standby power supply in this embodiment is in the standby power condition of the whole device in the actual test.
Fig. 8 is a schematic block diagram of a ceiling lamp system according to a preferred embodiment of the present invention, and as shown in fig. 8, the system includes an auxiliary power supply AC/DC module 801, a WIFI module 802, a zero-cross detection module 803, a thyristor module 804, a rectifier bridge 805, a main power supply PFC module 806, a constant voltage output module 807, and a load, where the load in the preferred embodiment is an LED module, and the LED module includes an LED driver 8081 and an LED lighting module 8082.
The main power supply PFC module 806 and the constant voltage output module 807 are connected to the live line and the neutral line, and mainly provide electric energy for the load. The constant voltage output module 807 may output 57V, 1.6A. The auxiliary power supply AC/DC module 801 may convert 220V AC power into 3.3V, 500mA DC power, and output the DC power to the WIFI module 802.
The alternating current is accessed to the system through the zero line and the live wire, the 3.3V stable direct current is output to the WIFI module 802 through the auxiliary power supply AC/DC module 801, the flashing is realized through the zero-crossing detection module 803, the WIFI module 802 is indicated with the work, the STB signal is output, the conduction and the blocking of the silicon controlled module 804 are controlled according to the high and low level of the STB signal, the connection of the live wire is cut off, the power failure of the rear-end load is realized, and the optimized standby power consumption is realized. Meanwhile, the WIFI module 802 is powered by the auxiliary power supply AC/DC circuit 801, so that normal working requirements can be met.
Example two:
an embodiment of the present application provides a low power consumption control method, which is used to implement the foregoing embodiments and preferred embodiments, and details of the foregoing description are omitted, and fig. 10 is a flowchart of the low power consumption control method, and as shown in fig. 10, specifically includes the following steps:
a power supply step S1, wherein the power supply step is used for generating and outputting stable power supply voltage after alternating current accessed by a power grid passes through a first rectification filter circuit through a power-taking live wire;
a signal output step S2, configured to receive the power supply voltage through a main control module, and output an STB signal according to an acquisition signal;
and a circuit control step S3, wherein the circuit control step is used for receiving the power-taking live wire and controlling the on-off of the load according to the STB signal through a silicon controlled control module, so as to realize low-power consumption standby.
In some embodiments, the main control module is specifically configured as a wireless module U1, the signal output step S2 further includes a signal determination step S201,
the wireless module U1 is connected with a communication module, and distinguishes different control states according to the characteristics of corresponding collected signals and outputs corresponding STB signals.
Through the steps, the wireless module U1 supplies power to get power from the front end of the SW1 which gets the power line, so that the wireless module U1 cannot supply power to the SW3 (shown in figure 2) because of the high level of the STB signal, and the wireless module U1 does not supply power of 3.3V, so that the standby online awakening condition can not be realized.
The low-power-consumption standby power supply has the advantages that power is supplied at the front end of SW1, alternating current is converted into 3.3V through an alternating circuit to supply power to a wireless module U1, an IO22 pin of the wireless module U1 outputs STB signals through resistors R15 and R16, and the on-off of an input live wire at the rear end of SW1 is controlled by controlling a control electrode G of a silicon controlled Q7 through an optical coupler PC 2. Under the standby state, the disconnection of the input live wire and the normal power supply of the wireless module are realized, and the low-power-consumption work under the standby state is achieved.
Fig. 11 is a flowchart of a power supplying step in the embodiment of the present application, and as shown in fig. 11, in some embodiments, the power supplying step S1 further includes:
a first rectifying and filtering step S101 of inputting the ac power accessed through the power line to a first rectifying and filtering circuit to output a start voltage to the power chip U10;
a voltage division step S102 of dividing the voltage via the FB port of the power chip U10;
a voltage transformation step S103, outputting the actually required power supply voltage through a flyback transformer;
in the second rectifying and filtering step S104, the supply voltage is output as a stable supply voltage through the secondary schottky rectifying and filtering circuit.
Fig. 12 is a flowchart of a circuit control step in the embodiment of the present application, and as shown in fig. 12, in some embodiments, the circuit control step S3 specifically includes:
a signal pull-up step S301, wherein the wireless module U1 connects the resistor R15 and the resistor R16 through a GPIO port to realize pull-up/pull-down of STB signals;
and a circuit on/off step S302, wherein the controlled silicon Q7 receives the signal and controls the on/off state of the control electrode G according to the high/low level of the STB signal, so as to realize the on/off of the power-taking live wire.
The PIN may be freely used by a user through program control, and the PIN may be used as a General Purpose Input (GPI) or General Purpose Output (GPO) or a General Purpose Input and Output (GPIO) according to practical considerations, such as when clk generator, chip select, etc.
In some embodiments, the circuit on/off step S302 further includes:
when an STB signal is at a high level, the optocoupler is in forward conduction, a CE pin (a pin 46 in fig. 5) of the optocoupler is opened, an electric signal is transmitted to a control electrode G of the controlled silicon Q7, and when the GK of the controlled silicon Q7 is in forward voltage and is greater than a gate trigger voltage VGT, the control electrode G is triggered, the AK of the controlled silicon Q7 is conducted, and an electric power line is conducted;
when the STB signal is the low level, the opto-coupler forward blocks, and the signal of telecommunication can't transmit, and silicon controlled rectifier Q7 does not have the trigger, and AK is in the off-state, cuts off and gets the live wire.
Example three:
the embodiment of the present application provides a low power consumption standby circuit, which is used to implement the foregoing embodiments and preferred embodiments, and the description of the circuit is omitted for brevity. Fig. 9 is a block diagram of a low power consumption standby circuit in an embodiment of the present application, and as shown in fig. 9, the circuit specifically includes:
a main control module 902;
a thyristor control module 903, electrically connected to the main control module 902, and connected in series to the power grid system through an SW1 port;
an auxiliary power supply unit 9012, configured to supply power to the main control module 902 and electrically connect to the power grid system, where a power taking end of the auxiliary power supply unit 9012 is disposed at a front end of the SW1 port;
the main control module 902 receives an acquisition signal and then outputs an STB signal to the scr control module 903, and the scr control module 903 is turned on or off through the SW1 port.
In this embodiment, the auxiliary power supply unit 9012 provides voltage for the main control module 902, the input end of the auxiliary power supply unit 9012 is connected with the power-taking live wire, the main control module 2 receives the acquisition signal and then outputs an STB signal to the thyristor control module 903, and the thyristor control module 903 controls the power-taking live wire and the load to be switched on and off according to the STB signal at the input end. Therefore, the power consumption reaches 1w or below in the standby state.
It should be noted that, when the thyristor control module 903 controls the power-taking live wire to be disconnected, the auxiliary power supply unit 9012 is not affected by the power supply function of the main control module 902, so as to achieve a state that the main control module can be waken up at any time in a standby state.
In some embodiments, the power supply system further includes a main power supply unit 9011 electrically connected to the power grid system, for supplying power to the load.
In some embodiments, thyristor control module 903 further comprises:
an on-off circuit 9031 electrically connected to the main control module 902 through an STB port;
the silicon controlled rectifier Q7 is electrically connected with the on-off circuit 9031 and is connected in series with a power-taking live wire connected to the power grid system;
the on-off circuit receives and controls the on-off of the on-off circuit according to the STB signal, and then controls the on-off of the power-taking live wire through the silicon controlled rectifier.
In some embodiments, the auxiliary power supply unit 9012 further includes: the first rectifying and filtering circuit 90121, the voltage dividing circuit 90122, the RCD absorption circuit 90123, the flyback transformer 90124, and the secondary schottky rectifying and filtering circuit 90125 are electrically connected, and the secondary schottky rectifying and filtering circuit 90125 is electrically connected to the main control module 902.
In some embodiments, the main control module 902 further includes a second rectifying and filtering circuit 9021, a zero-crossing detection circuit 9022, and a wireless module U1, wherein the second rectifying and filtering circuit 9021 is connected in parallel with the zero-crossing detection circuit 9022, the wireless module U1 includes an MCU and a wireless communication module electrically connected to the MCU, and the wireless communication module is electrically connected to the on-off circuit 9031 through an STB port.
In some embodiments, the wireless communication module is configured as one or a combination of WiFi and bluetooth.
In some embodiments, the on/off circuit 9031 further includes a noise reduction circuit 90311 and an optical coupler PC2, the noise reduction circuit 90311 is electrically connected to the STB port of the wireless module U1, and output pins of the optical coupler PC2 are respectively connected to A, G pins of the thyristor Q7.
Example four:
the embodiment of the application provides an intelligent product, including above-mentioned low power consumption standby power supply, low power consumption standby power supply still can external wiFi intelligent gateway, APP or bluetooth remote controller, and all with host system electric connection.
Example five:
the embodiment of the application provides a power supply controller, which comprises the low-power-consumption standby power supply. It should be noted that the power controller includes a power switch power controller, etc., but the invention is not limited thereto.
Example six:
the embodiment of the application provides a ceiling lamp, which comprises the low-power consumption standby power supply and a lighting part.
It should be noted that the ceiling lamp includes a Yeelight intelligent bulb, an intelligent down lamp and an intelligent ceiling lamp, especially a plurality of bulbs connected in parallel with the down lamp and the down lamp, but the invention is not limited thereto.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (24)
1. A low power consumption standby power supply, comprising:
the power supply module is used for outputting a set value of power supply voltage;
the main control module receives the power supply voltage and outputs a judgment signal according to an acquisition signal;
and the silicon controlled control module is electrically connected with the main control module, receives the judgment signal and controls the on-off of the power taking live wire and the load according to the judgment signal.
2. The low power consumption standby power supply according to claim 1, wherein the determination signal is set as an STB signal, and the thyristor control module receives and controls on/off of the power line and the load according to the STB signal.
3. The low power consumption standby power supply according to claim 1 or 2, wherein the power supply module comprises a main power supply unit and an auxiliary power supply unit, wherein the main power supply unit is used for supplying power to a load, the auxiliary power supply unit is used for supplying power to the main control module, and a power taking end of the auxiliary power supply unit is located at a front end of an electric connection position of the thyristor control module and the power taking live wire.
4. The low power consumption standby power supply according to claim 3, wherein said auxiliary power supply unit further comprises: the power supply comprises a first rectifying and filtering circuit, a voltage division circuit, an RCD absorption circuit, a flyback transformer and a secondary Schottky rectifying and filtering circuit which are electrically connected, wherein the secondary Schottky rectifying and filtering circuit is electrically connected with the main control module.
5. The low power consumption standby power supply according to claim 1, wherein the main control module further comprises a second rectifying and filtering circuit, a zero-crossing detection circuit and a wireless module, wherein the second rectifying and filtering circuit is connected in parallel with the zero-crossing detection circuit, the wireless module comprises an MCU and a wireless communication module electrically connected with the MCU, and the wireless communication module is electrically connected with the scr control module through an STB port.
6. The low power consumption standby power supply according to claim 5, wherein the wireless communication module is configured as one or a combination of WiFi and Bluetooth.
7. The low power consumption standby power supply according to claim 5, wherein the thyristor control module further comprises a switch circuit and a thyristor, the switch circuit and the thyristor are connected in series with the wireless module, and the thyristor is electrically connected with the power-taking live wire.
8. The low power consumption standby power supply according to claim 7, wherein the on-off circuit further comprises a noise reduction circuit and an optical coupler, the noise reduction circuit is electrically connected with an STB port of the wireless module, and output pins of the optical coupler are respectively connected with A, G pins of the thyristor.
9. The low power consumption standby power supply according to claim 3, wherein the controlling of the on/off of the power line and the load is controlling of the on/off of the power line and the main power supply unit.
10. A low power consumption control method for applying the low power consumption standby power supply of any one of claims 1 to 9, comprising the steps of:
a power supply step, namely, passing the alternating current accessed by the power grid through a first rectification filter circuit through a power-taking live wire to generate stable power supply voltage and outputting the stable power supply voltage;
a signal output step, which is used for receiving the power supply voltage through a main control module and outputting an STB signal according to an acquisition signal;
and a circuit control step, which is used for receiving the power-taking live wire and controlling the on-off of the load according to the STB signal through a silicon controlled control module, so as to realize the low-power standby.
11. The low power consumption control method according to claim 10, wherein the main control module is specifically configured as a wireless module, the signal output step further comprises a signal determination step,
the wireless module is connected with a communication module, distinguishes different control states according to the characteristics corresponding to the acquired signals and outputs signals corresponding to the STB.
12. The low power consumption control method according to claim 10, wherein the circuit control step specifically includes:
a signal pull-up step, wherein the wireless module is connected with a resistor R15 and a resistor R16 through a GPIO port to realize pull-up/pull-down of STB signals;
and a circuit switching-on/switching-off step, wherein the controlled silicon receives and controls the switching-on/switching-off state of a control electrode G of the STB according to the high/low level of the STB signal so as to realize the switching-on/switching-off of the power-taking live wire.
13. The low power consumption control method according to claim 12, wherein the circuit turning on/off step further comprises:
when the STB signal is at a high level, an optical coupler is conducted in a forward direction, an electric signal is transmitted to the control electrode G, when the GK of the silicon controlled rectifier is at a forward voltage and is greater than a gate trigger voltage, the control electrode G is triggered, the AK of the silicon controlled rectifier is conducted, and the power-taking line is conducted;
when the STB signal is the low level, the opto-coupler forward blocks, and the signal of telecommunication can't be transmitted, the silicon controlled rectifier does not have the trigger, and AK is in the off-state, cuts off get the live wire.
14. The low power consumption control method of claim 11, wherein the supplying step further comprises:
a first rectifying and filtering step of inputting the alternating current accessed through the power-taking live wire to a first rectifying and filtering circuit to output a starting voltage to a power chip;
a voltage division step, namely dividing the voltage through an FB port of the power supply chip;
a voltage transformation step, namely outputting the actually required power supply voltage through a flyback transformer;
and a second rectifying and filtering step, wherein the power supply voltage is output by a secondary Schottky rectifying and filtering circuit to be stable.
15. A low power consumption standby circuit to which the low power consumption control method of any one of claims 10 to 14 is applied, comprising:
a main control module;
the silicon controlled rectifier control module is electrically connected with the main control module and is connected into the power grid system in series through an SW1 port;
the auxiliary power supply unit is used for supplying power to the main control module and is electrically connected with the power grid system, and the power taking end of the auxiliary power supply unit is arranged at the front end of the SW1 port;
the main control module receives an acquisition signal and then outputs an STB signal to the controlled silicon control module, and the controlled silicon control module is switched on and off through an SW1 port.
16. The low power consumption standby circuit of claim 15, further comprising a main power supply unit electrically connected to the grid system for supplying power to a load.
17. The low power standby circuit of claim 15 or 16, wherein the thyristor control module further comprises:
the on-off circuit is electrically connected with the main control module through an STB port;
the silicon controlled rectifier is electrically connected with the on-off circuit and is connected in series with a power-taking live wire of the power grid system;
the on-off circuit receives and controls the on-off of the on-off circuit according to the STB signal, and then the on-off of the power-taking live wire is controlled through the silicon controlled rectifier.
18. The low power consumption standby circuit of claim 15, wherein said auxiliary power supply unit further comprises: the power supply comprises a first rectifying and filtering circuit, a voltage division circuit, an RCD absorption circuit, a flyback transformer and a secondary Schottky rectifying and filtering circuit which are electrically connected, wherein the secondary Schottky rectifying and filtering circuit is electrically connected with the main control module.
19. The low power standby circuit of claim 15, wherein the main control module further comprises a second rectifying and filtering circuit, a zero-crossing detection circuit, and a wireless module, wherein the second rectifying and filtering circuit is connected in parallel with the zero-crossing detection circuit, the wireless module comprises an MCU and a wireless communication module electrically connected to the MCU, and the wireless communication module is electrically connected to the on-off circuit through an STB port.
20. The circuit of claim 19, wherein the wireless communication module is configured as one or a combination of WiFi and bluetooth.
21. The low power consumption standby circuit according to claim 19 or 20, wherein the on-off circuit further comprises a noise reduction circuit and an optical coupler, the noise reduction circuit is electrically connected with an STB port of the wireless module, and output pins of the optical coupler are respectively connected with A, G pins of the thyristor.
22. A smart product comprising the low power standby power supply of any one of claims 1 to 9,
the low-power consumption standby power supply can also be externally connected with a WiFi intelligent gateway, an APP or a Bluetooth remote controller and is electrically connected with the main control module.
23. A power supply controller comprising the low power consumption standby power supply of any one of claims 1-9.
24. A ceiling lamp comprising the low power standby power supply and lighting unit of any one of claims 1-9.
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