CN109245289B - Low-video-load power consumption control circuit based on double-switch power supply electric energy meter - Google Patents
Low-video-load power consumption control circuit based on double-switch power supply electric energy meter Download PDFInfo
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- CN109245289B CN109245289B CN201811279643.9A CN201811279643A CN109245289B CN 109245289 B CN109245289 B CN 109245289B CN 201811279643 A CN201811279643 A CN 201811279643A CN 109245289 B CN109245289 B CN 109245289B
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- 230000003750 conditioning effect Effects 0.000 claims abstract description 60
- 238000001514 detection method Methods 0.000 claims abstract description 52
- 239000003990 capacitor Substances 0.000 claims description 16
- 230000009977 dual effect Effects 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 239000003381 stabilizer Substances 0.000 claims description 11
- 208000010415 Low Vision Diseases 0.000 claims description 7
- 238000004146 energy storage Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 2
- 230000004303 low vision Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 6
- 230000001965 increasing effect Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The invention discloses a low-video-load power consumption control circuit based on a double-switch power supply electric energy meter, which comprises the following components: the power supply circuit comprises a voltage detection circuit, a reference circuit, a signal conditioning circuit, a power supply circuit and a switch circuit, wherein the voltage detection circuit detects the threshold value of the output voltage of the output ends of a main power supply and an auxiliary power supply, the reference circuit provides a comparison reference signal for the signal conditioning circuit according to the threshold value of the output voltage detected by the voltage detection circuit, the signal conditioning circuit generates a control signal of the switch circuit after conditioning the comparison reference signal provided by the reference circuit, the power supply circuit is used as the power supply of the reference circuit and the switch circuit, and the switch circuit receives the control signal generated by the signal conditioning circuit to reduce the power consumption of the main power supply. By the mode, the requirements of self-adapting different voltages and power grades on low video-on-load power consumption can be met, different elements do not need to be replaced according to different specifications, and the purpose of reducing video-on-load power consumption is achieved.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a low-video-load power consumption control circuit based on a double-switch power supply electric energy meter.
Background
With the increasingly wide application of intelligent electric meters in the global scope, domestic electric meter manufacturers go home and abroad, the technical index requirements on electric energy meters are more strict, wherein higher requirements, wider and higher voltage input and lower power consumption requirements are provided for power supplies.
The standard of IEC (International Electrotechnical Commission ) 62053 clearly shows that under the condition of rated operation, the electric energy meter with double power supplies of main power supply and auxiliary power supply has the requirement of 0.5VA (Volt-amp) (three-phase power-on refers to single phase) for the apparent load power consumption of the main power supply. For the electric energy meter requiring power supply in a wide input voltage range, a switching power supply mode is generally selected, because a control chip and some EMC (Electro Magnetic Compatibility ) protection devices have larger power consumption, the requirement of 0.5VA on the visual load of a main power supply is difficult to meet under a high-voltage input condition, and in order to improve brand strength, all manufacturers can limit key technical indexes of the full-power product, so that the visual load power consumption is reduced.
The technical scheme of low video-on-load power consumption commonly applied in the market at present comprises the following steps: the safety capacitor is reduced or even cancelled on the main power supply, so that reactive power consumption is reduced; or increasing differential mode inductance, reducing rectifying energy storage capacitance, and increasing PF (power Factor) value; or a low-power control chip is selected, the voltage dividing resistance is increased, and the active power consumption is reduced. However, these schemes have problems of: the universality is not strong, and different elements are often required to be selected when different input voltages and power grades are required; the product performance needs to be comprehensively considered, and the apparent load power consumption is difficult to reduce to a reasonable limit value.
Disclosure of Invention
The invention aims to provide a low-vision-load power consumption control circuit based on a double-switch power supply electric energy meter, which can meet the requirements of self-adaption different voltages and power grades on low-vision-load power consumption, does not need to change and select different elements according to different specifications, and achieves the purpose of reducing vision-load power consumption.
According to one aspect of the present invention, there is provided a low-apparent-load power consumption control circuit based on a dual-switching-power supply electric energy meter, comprising:
the device comprises a voltage detection circuit, a reference circuit, a signal conditioning circuit, a power supply circuit and a switch circuit;
one end of the voltage detection circuit is connected with the dual power supply output ends of the main power supply and the auxiliary power supply, the other end of the voltage detection circuit is connected with the signal conditioning circuit, one end of the reference circuit is connected with the signal conditioning circuit, the other end of the reference circuit is connected with the power supply circuit, one end of the signal conditioning circuit is connected with the voltage detection circuit, the other end of the signal conditioning circuit is connected with the reference circuit, one end of the power supply circuit is connected with the reference circuit and the switch circuit respectively, the other end of the power supply circuit is connected with the dual power supply output ends of the main power supply and the auxiliary power supply respectively, the input ends of the switch circuit are connected with the signal conditioning circuit and the power supply circuit respectively, and the output end of the switch circuit is connected with the main power supply;
the voltage detection circuit detects the threshold value of the output voltage of the dual-power output end of the main power supply and the auxiliary power supply, the reference circuit provides a comparison reference signal for the signal conditioning circuit according to the threshold value of the output voltage detected by the voltage detection circuit, the signal conditioning circuit generates a control signal of the switching circuit after conditioning the comparison reference signal provided by the reference circuit, the power supply circuit is used as the power supply of the reference circuit and the switching circuit, and the switching circuit receives the control signal generated by the signal conditioning circuit to reduce the power consumption of the main power supply.
One end of the voltage detection circuit is directly connected with the output end of the auxiliary power supply, the other end of the voltage detection circuit is connected with the signal conditioning circuit, and the voltage detection circuit detects the threshold value of the output voltage of the output end of the auxiliary power supply.
Wherein, the voltage detection circuit includes:
the first current limiting resistor, the second current limiting resistor and the filter capacitor;
one end of the first current limiting resistor is connected with the output ends of the main power supply and the auxiliary power supply or directly connected with the output ends of the auxiliary power supply, the other end of the first current limiting resistor is connected with one end of the second current limiting resistor, the other end of the second current limiting resistor is grounded, and the filter capacitor is connected in parallel with the two ends of the second current limiting resistor, wherein the output ends of the main power supply and the auxiliary power supply are arranged on voltage detection points;
the first current limiting resistor and the second current limiting resistor detect the size of the voltage detection point, and the filter capacitor suppresses signal interference and ensures the reliability of the detected size of the voltage detection point.
Wherein the reference circuit comprises:
the third current limiting resistor and the voltage stabilizing device;
one end of the third current limiting resistor is connected with the dual power output ends of the main power supply and the auxiliary power supply, and the other end of the third current limiting resistor is connected with the voltage stabilizing device;
the third current limiting resistor limits the current of the voltage stabilizing device, and the voltage stabilizing device provides a comparison reference signal for the signal conditioning circuit according to the threshold value of the output voltage detected by the voltage detection circuit.
Wherein the signal conditioning circuit comprises:
a fourth current limiting resistor and a comparator;
one end of an input pin of the comparator is connected with a connection point of the first current limiting resistor and the second current limiting resistor of the voltage detection circuit, and the other end of the input pin of the comparator is connected with a reference end of the reference circuit.
Wherein, the power supply circuit includes:
a linear voltage regulator and an energy storage capacitor;
the input end of the linear voltage stabilizer is connected with the dual power supply output ends of the main power supply and the auxiliary power supply, and the output end of the linear voltage stabilizer is connected with the ground through the energy storage capacitor;
and the linear voltage stabilizer outputs the power supply and the pull-up power supply which are respectively used as the signal conditioning circuit and the switching circuit.
Wherein, the switching circuit includes:
the device comprises a triode, a fifth current limiting resistor, a sixth current limiting resistor, a seventh current limiting resistor and an optocoupler relay;
the base stage of the triode is connected with the output of the comparator of the signal conditioning circuit through the fifth current limiting resistor, the emitting stage of the triode is connected with the cathode of the light emitting diode of the primary test of the optocoupler relay, the collector of the triode is pulled down to the ground through the sixth current limiting resistor, one end and the other end of the secondary side of the optocoupler relay are used as output ends, and the seventh current limiting resistor is connected with the other end of the secondary side of the optocoupler relay;
and the secondary side of the optocoupler relay adopts a normally closed mode, and outputs the normally closed mode as the control for switching the low-power-consumption state of the main power supply so as to reduce the power consumption of the main power supply.
Wherein the voltage stabilizing device is a TL431 type voltage stabilizer or a reference chip.
Wherein, the triode is a plug and play triode.
Wherein the optocoupler relay is an electromagnetic relay.
According to the scheme, the voltage detection circuit can detect the threshold value of the output voltage of the dual-power output ends of the main power supply and the auxiliary power supply, the reference circuit can provide a comparison reference signal for the signal conditioning circuit according to the threshold value of the output voltage detected by the voltage detection circuit, the signal conditioning circuit can condition the comparison reference signal provided by the reference circuit and then generate a control signal of the switching circuit, the power supply circuit can serve as the power supply of the reference circuit and the switching circuit, the switching circuit can receive the control signal generated by the signal conditioning circuit to reduce the power consumption of the main power supply, the requirements of self-adapting different voltages and power classes on low video load power consumption can be met, different elements are not required to be replaced according to different specifications, and the aim of reducing video load power consumption is achieved.
Further, according to the scheme, the voltage output by the main power supply and the auxiliary power supply can be monitored to give the control signal, the traditional method for reducing the video-on-load power consumption through simple adjustment devices is replaced, on one hand, the control is simple, the self-adaptive wide voltage specification is met, on the other hand, the stress impact of key hardware is reduced through changing the working mode of the control chip, and the reliability and the service life of a product are improved.
Furthermore, the scheme can adopt weak current to control strong current and isolate the strong current from a controlled circuit, so that the anti-interference capability can be improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of a low-apparent-load power consumption control circuit based on a dual-switching-power-supply electric energy meter according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of a low-apparent-load power consumption control circuit based on a dual-switch power supply meter according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustrating the present invention, but do not limit the scope of the present invention. Likewise, the following examples are only some, but not all, of the examples of the present invention, and all other examples, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the present invention.
The invention provides a low-video-load power consumption control circuit based on a double-switch power supply electric energy meter, which can meet the requirements of self-adaption different voltages and power grades on low-video-load power consumption, does not need to change and select different elements according to different specifications, and achieves the purpose of reducing video-load power consumption.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an embodiment of a low-apparent-load power consumption control circuit based on a dual-switch power supply electric energy meter according to the present invention, and fig. 2 is a schematic specific circuit diagram of an embodiment of a low-apparent-load power consumption control circuit based on a dual-switch power supply electric energy meter according to the present invention. As shown in fig. 1 and 2, the low-apparent-load power consumption control circuit 10 based on the dual-switching-power supply electric energy meter includes: a voltage detection circuit 11, a reference circuit 12, a signal conditioning circuit 13, a power supply circuit 14, and a switching circuit 15.
One end of the voltage detection circuit 11 is connected with the dual power output ends of the main power source and the auxiliary power source, the other end of the voltage detection circuit 11 is connected with the signal conditioning circuit 13, one end of the reference circuit 12 is connected with the signal conditioning circuit 13, the other end of the reference circuit 12 is connected with the power supply circuit 14, one end of the signal conditioning circuit 13 is connected with the voltage detection circuit 11, the other end of the signal conditioning circuit 13 is connected with the reference circuit 12, one end of the power supply circuit 14 is connected with the reference circuit 12 and the switch circuit 15 respectively, the other end of the power supply circuit 14 is connected with the dual power output ends of the main power source and the auxiliary power source, the input ends of the switch circuit 15 are connected with the signal conditioning circuit 13 and the power supply circuit 14 respectively, and the output end of the switch circuit 15 is connected with the main power source.
The voltage detection circuit 11 detects the threshold value of the output voltage of the dual power output ends of the main power supply and the auxiliary power supply, the reference circuit 12 provides a comparison reference signal for the signal conditioning circuit 13 according to the threshold value of the output voltage detected by the voltage detection circuit 11, the signal conditioning circuit 13 generates a control signal of the switch circuit 15 after conditioning the comparison reference signal provided by the reference circuit 12, the power supply circuit 14 is used as the power supply of the reference circuit 12 and the switch circuit 15, and the switch circuit 15 receives the control signal generated by the signal conditioning circuit 13 to reduce the power consumption of the main power supply.
Alternatively, one end of the voltage detection circuit 11 may be directly connected to the output terminal of the auxiliary power supply, the other end of the voltage detection circuit 11 is connected to the signal conditioning circuit 13, and the voltage detection circuit 11 detects the threshold value of the output voltage of the output terminal of the auxiliary power supply.
Alternatively, the voltage detection circuit 11 may include:
the first current limiting resistor R1, the second current limiting resistor R2 and the filter capacitor C1;
one end of the first current limiting resistor R1 is connected with the output end of the main power supply, the output end of the auxiliary power supply or the output end of the auxiliary power supply directly, the other end of the first current limiting resistor R1 is connected with one end of the second current limiting resistor R2, the other end of the second current limiting resistor R2 is grounded, and the filter capacitor C1 is connected with two ends of the second current limiting resistor R2 in parallel, wherein the output ends of the main power supply and the auxiliary power supply are arranged on a voltage detection point V;
the first current limiting resistor R1 and the second current limiting resistor R2 detect the magnitude of the voltage detection point V, and the filter capacitor C1 suppresses signal interference, so as to ensure the reliability of the detected magnitude of the voltage detection point V.
Alternatively, the reference circuit 12 may include:
the third current limiting resistor R3 and the voltage stabilizing device U2;
one end of the third current limiting resistor R3 is connected with the dual power output ends of the main power supply and the auxiliary power supply, and the other end of the third current limiting resistor R3 is connected with the voltage stabilizing device U2;
the third current limiting resistor R3 limits the current of the voltage stabilizing device U2, and the voltage stabilizing device U2 provides a comparison reference signal for the signal conditioning circuit 13 according to the threshold value of the output voltage detected by the voltage detecting circuit 11.
Alternatively, the voltage regulator device U2 may be a TL431 type voltage regulator or a reference chip, etc., and the present invention is not limited thereto.
Optionally, the signal conditioning circuit 13 may include:
a fourth current limiting resistor R4 and a comparator U3;
one end of an input pin of the comparator U3 is connected to a connection point of the first current limiting resistor R1 and the second current limiting resistor R2 of the voltage detection circuit 11, and the other end of the input pin of the comparator U3 is connected to a reference end of the reference circuit 12.
Optionally, the power supply circuit 14 may include:
a linear voltage stabilizer U1 and an energy storage capacitor C2;
the input end of the linear voltage stabilizer U1 is connected with the dual power output ends of the main power supply and the auxiliary power supply, and the output end of the linear voltage stabilizer U1 is connected with the ground through the energy storage capacitor C2;
the linear voltage regulator U1 outputs both the pull-up and the power supply as the signal conditioning circuit 13 and the switching circuit 15, respectively.
Optionally, the switching circuit 15 may include:
triode T1, fifth current limiting resistor R5, sixth current limiting resistor R6, seventh current limiting resistor R7 and optocoupler relay U4;
the base stage of the triode T1 is connected with the output of a comparator U3 of the signal conditioning circuit 13 through a fifth current limiting resistor R5, the emitting stage of the triode T1 is connected with the cathode of a primary-measurement light-emitting diode of an optocoupler relay U4, the collector of the triode T1 is pulled down to the ground through a sixth current limiting resistor R6, one end A and the other end B of the secondary side of the optocoupler relay U4 are used as output ends, and a seventh current limiting resistor R7 is connected with the other end B of the secondary side of the optocoupler relay U4;
the secondary side of the optocoupler relay U4 adopts a normally closed mode, and outputs the normally closed mode as the control for switching the low-power-consumption state of the main power supply, so as to reduce the power consumption of the main power supply.
Alternatively, the transistor T1 may be a PNP (Plug-and-Play) transistor, which is not limited by the present invention.
Alternatively, the optocoupler relay U4 may be an electromagnetic relay, and the present invention is not limited thereto.
In this embodiment, the working process of the low-video-load power consumption control circuit 10 based on the dual-switching power supply electric energy meter may include:
the voltage detection circuit 11 detects the magnitude of the output voltage V through the first current limiting resistor R1 and the second current limiting resistor R2; the reference circuit 12 generates a reference voltage, for example, 2.5V (volts) using a voltage regulator device U2 such as a reference chip or TL431 type voltage regulator; the signal conditioning circuit 13 employs the comparator U3 to generate an operation signal of the switch circuit 15; the power input of the power supply circuit 14 is from the output of the auxiliary power supply, and the linear voltage regulator U1 with output of 5V can be used for supplying power to the signal conditioning circuit 13 and the switch circuit 15; the triode T1 in the switch circuit 15 is used to release the driving current of the optocoupler relay U4, the optocoupler relay U4 is used to control strong current with weak current, and the optocoupler relay U4 is in a normally closed mode when the main power supply is independently powered on.
In this embodiment, when the electric energy meter is designed based on the dual-switch power supply, under the condition that the main power supply and the auxiliary power supply power, the auxiliary power supply is required to supply power preferentially, that is, the voltages V output by the main power supply and the auxiliary power supply are required to be different, that is, the output voltage of the main power supply is smaller than the output voltage of the auxiliary power supply, that is, V (main power supply) < V (auxiliary power supply).
In this embodiment, when the negative input terminal of the comparator U3 of the signal conditioning circuit 13 detects that V > VREF (r1+r2)/R1, where VREF refers to a reference voltage, the comparator U3 outputs a low level signal, the triode T1 in the switch circuit 15 is turned on, the light emitting diode of the optocoupler relay U4 measured once can be turned on by inductive excitation attraction in the optocoupler relay U4, and the secondary side of the optocoupler relay U4 is turned from a normally closed state to a normally open state, so as to cut off the main power circuit and reduce power consumption.
In this embodiment, when the negative input terminal of the comparator U3 of the signal conditioning circuit 13 detects V < = VREF (r1+r2)/R1, the output terminal of the comparator U3 has a pull-up resistor to the power supply, the comparator U3 outputs a high level signal, the triode T1 in the switch circuit 15 is turned off, the light emitting diode of the optocoupler relay U4 is turned off, the secondary side of the optocoupler relay U4 will keep the original state and the main power supply will work normally.
In this embodiment, the low-video-load power consumption control circuit 10 based on the dual-switch power supply electric energy meter can switch off the control chip of the main power supply or make the control chip in an extremely low power consumption mode by detecting the threshold value of the output voltage of the dual-power output ends of the main power supply and the auxiliary power supply under the condition that the two power supplies of the main power supply and the auxiliary power supply are powered on, so as to reduce the active power consumption and simultaneously achieve the purpose of reducing video load.
In this embodiment, the power supply of the low-vision-load power consumption control circuit 10 based on the dual-switch power supply electric energy meter is taken from the auxiliary power supply, the power consumption of the main power supply is not increased when the main power supply is cut off, and the vision-load power consumption can be greatly reduced after the low-vision-load power consumption control circuit 10 based on the dual-switch power supply electric energy meter works.
It can be found that, in this embodiment, the voltage detection circuit may detect the threshold value of the output voltage of the dual power output ends of the main power source and the auxiliary power source, the reference circuit may provide a comparison reference signal for the signal conditioning circuit according to the threshold value of the output voltage detected by the voltage detection circuit, the signal conditioning circuit may condition the comparison reference signal provided by the reference circuit and then generate a control signal of the switching circuit, the power supply circuit may be used as the power supply of the reference circuit and the switching circuit, and the switching circuit may receive the control signal generated by the signal conditioning circuit to reduce the power consumption of the main power source, so as to realize the requirement of self-adapting different voltages and power classes to low video power consumption, without changing different elements according to different specifications, and achieve the purpose of reducing video power consumption.
Further, in this embodiment, the voltage levels output by the main power supply and the auxiliary power supply can be monitored to give a control signal, and the conventional method for reducing the video-on-load power consumption by simply adjusting the device is replaced, so that on one hand, the control is simple, the adaptive wide voltage specification is met, on the other hand, the stress impact of key hardware is reduced by changing the working mode of the control chip, and the reliability and the service life of the product are improved.
Further, in this embodiment, weak current may be used to control strong current and isolate the controlled circuit, so that the anti-interference capability can be improved.
Those of ordinary skill in the art will appreciate that: the discussion of any of the embodiments above is merely exemplary and is not intended to suggest that the scope of the disclosure, including the claims, is limited to these examples; the technical features of the above embodiments or in the different embodiments may also be combined within the idea of the invention, the steps may be implemented in any order and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
Additionally, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures, in order to simplify the illustration and discussion, and so as not to obscure the invention. Furthermore, the devices may be shown in block diagram form in order to avoid obscuring the invention, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the present invention is to be implemented (i.e., such specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the invention, it should be apparent to one skilled in the art that the invention can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative in nature and not as restrictive.
While the invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of those embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may use the embodiments discussed.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omission, modification, equivalent replacement, improvement, etc. of the present invention should be included in the scope of the present invention.
Claims (5)
1. The utility model provides a low apparent power consumption control circuit that carries based on two switching power supply power meters which characterized in that includes:
the device comprises a voltage detection circuit, a reference circuit, a signal conditioning circuit, a power supply circuit and a switch circuit;
one end of the voltage detection circuit is connected with the dual power supply output ends of the main power supply and the auxiliary power supply, the other end of the voltage detection circuit is connected with the signal conditioning circuit, one end of the reference circuit is connected with the signal conditioning circuit, the other end of the reference circuit is connected with the power supply circuit, one end of the signal conditioning circuit is connected with the voltage detection circuit, the other end of the signal conditioning circuit is connected with the reference circuit, one end of the power supply circuit is connected with the reference circuit and the switch circuit respectively, the other end of the power supply circuit is connected with the dual power supply output ends of the main power supply and the auxiliary power supply respectively, the input ends of the switch circuit are connected with the signal conditioning circuit and the power supply circuit respectively, and the output end of the switch circuit is connected with the main power supply;
the voltage detection circuit detects the threshold value of the output voltage of the dual-power output ends of the main power supply and the auxiliary power supply, the reference circuit provides a comparison reference signal for the signal conditioning circuit according to the threshold value of the output voltage detected by the voltage detection circuit, the signal conditioning circuit generates a control signal of the switching circuit after conditioning through the comparison reference signal provided by the reference circuit, the power supply circuit is used as the power supply of the reference circuit and the switching circuit, and the switching circuit receives the control signal generated by the signal conditioning circuit to reduce the power consumption of the main power supply;
wherein the reference circuit comprises:
the third current limiting resistor and the voltage stabilizing device;
one end of the third current limiting resistor is connected with the dual power output ends of the main power supply and the auxiliary power supply, and the other end of the third current limiting resistor is connected with the voltage stabilizing device;
the third current limiting resistor limits the current of the voltage stabilizing device, and the voltage stabilizing device provides a comparison reference signal for the signal conditioning circuit according to the threshold value of the output voltage detected by the voltage detection circuit;
wherein, the voltage detection circuit includes:
the first current limiting resistor, the second current limiting resistor and the filter capacitor;
one end of the first current limiting resistor is connected with the output ends of the main power supply and the auxiliary power supply or directly connected with the output ends of the auxiliary power supply, the other end of the first current limiting resistor is connected with one end of the second current limiting resistor, the other end of the second current limiting resistor is grounded, and the filter capacitor is connected in parallel with the two ends of the second current limiting resistor, wherein the output ends of the main power supply and the auxiliary power supply are arranged on voltage detection points;
the first current limiting resistor and the second current limiting resistor detect the size of the voltage detection point, and the filter capacitor suppresses signal interference and ensures the reliability of the detected size of the voltage detection point;
wherein the signal conditioning circuit comprises:
a fourth current limiting resistor and a comparator;
one end of an input pin of the comparator is connected with a connection point of the first current limiting resistor and the second current limiting resistor of the voltage detection circuit, and the other end of the input pin of the comparator is connected with a reference end of the reference circuit;
wherein, the switching circuit includes:
a triode, a fifth current limiting resistor, a sixth current limiting resistor, a seventh current limiting resistor and an electromagnetic relay;
the base stage of the triode is connected with the output of the comparator of the signal conditioning circuit through the fifth current limiting resistor, the emitting stage of the triode is connected with the cathode of the light emitting diode of the primary measurement of the electromagnetic relay, the collector of the triode is pulled down to the ground through the sixth current limiting resistor, one end and the other end of the secondary side of the electromagnetic relay are used as output ends, and the seventh current limiting resistor is connected with the other end of the secondary side of the electromagnetic relay;
the secondary side of the electromagnetic relay adopts a normally closed mode, and outputs the normally closed mode as the control for switching the low-power-consumption state of the main power supply to reduce the power consumption of the main power supply;
wherein, the triode is a plug and play triode.
2. The low-video-carrier power consumption control circuit based on the dual-switch power supply electric energy meter according to claim 1, wherein one end of the voltage detection circuit is directly connected with the output end of the auxiliary power supply, the other end of the voltage detection circuit is connected with the signal conditioning circuit, and the voltage detection circuit detects the threshold value of the output voltage of the output end of the auxiliary power supply.
3. The low-vision-based power consumption control circuit based on a dual-switching-power supply electric energy meter according to claim 1 or 2, characterized in that said power supply circuit comprises:
a linear voltage regulator and an energy storage capacitor;
the input end of the linear voltage stabilizer is connected with the dual power supply output ends of the main power supply and the auxiliary power supply, and the output end of the linear voltage stabilizer is connected with the ground through the energy storage capacitor;
and the linear voltage stabilizer outputs the power supply and the pull-up power supply which are respectively used as the signal conditioning circuit and the switching circuit.
4. The low-vision-based power consumption control circuit based on a dual-switching-power supply electric energy meter according to claim 1, wherein the voltage stabilizing device is a TL431 type voltage stabilizer or a reference chip.
5. The low-vision-carrying power consumption control circuit based on the double-switch power supply electric energy meter according to claim 1, wherein the electromagnetic relay is replaced by an optocoupler relay.
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| CN201811279643.9A CN109245289B (en) | 2018-10-30 | 2018-10-30 | Low-video-load power consumption control circuit based on double-switch power supply electric energy meter |
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| CN109245289B true CN109245289B (en) | 2023-12-22 |
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|---|---|---|---|---|
| CN101719689A (en) * | 2009-12-16 | 2010-06-02 | 威胜集团有限公司 | Dual power supply switching circuit for electronic electric energy meter |
| WO2015010475A1 (en) * | 2013-07-25 | 2015-01-29 | 深圳市明微电子股份有限公司 | Switch power supply driving chip and switch power supply driving circuit |
| CN105244997A (en) * | 2015-10-30 | 2016-01-13 | 国家电网公司 | Double power switching device for acquisition terminal |
| WO2017059706A1 (en) * | 2015-10-10 | 2017-04-13 | 中兴通讯股份有限公司 | Power source dormancy and wakeup circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN208874354U (en) * | 2018-10-30 | 2019-05-17 | 广州供电局有限公司 | Low view based on double switch power power supply electric energy meter carries power control circuit |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101719689A (en) * | 2009-12-16 | 2010-06-02 | 威胜集团有限公司 | Dual power supply switching circuit for electronic electric energy meter |
| WO2015010475A1 (en) * | 2013-07-25 | 2015-01-29 | 深圳市明微电子股份有限公司 | Switch power supply driving chip and switch power supply driving circuit |
| WO2017059706A1 (en) * | 2015-10-10 | 2017-04-13 | 中兴通讯股份有限公司 | Power source dormancy and wakeup circuit |
| CN105244997A (en) * | 2015-10-30 | 2016-01-13 | 国家电网公司 | Double power switching device for acquisition terminal |
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