CN113574488A - Power supply control method and device and power utilization equipment - Google Patents
Power supply control method and device and power utilization equipment Download PDFInfo
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- CN113574488A CN113574488A CN202080016206.7A CN202080016206A CN113574488A CN 113574488 A CN113574488 A CN 113574488A CN 202080016206 A CN202080016206 A CN 202080016206A CN 113574488 A CN113574488 A CN 113574488A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
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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
- H02J4/00—Circuit arrangements for mains or distribution networks not specified as ac or dc
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Abstract
The embodiment of the invention provides a power supply control method, a power supply control device and electric equipment, wherein the electric equipment is connected to a power supply end through a power line, and the power supply control method comprises the following steps: after the electric equipment is powered on and started, the electric equipment acquires the input voltage and the output voltage of the power line. And determining the current resistance value of the power line according to the input voltage and the output voltage of the power line and the actual power of the electric equipment, and executing corresponding control action on the electric equipment according to the current resistance value of the power line. The electric equipment continuously detects the resistance value of the power line in the using process so as to timely perform corresponding power supply control based on the resistance change of the power line, and the safe and reliable operation of the electric equipment can be ensured.
Description
Technical Field
The invention relates to the field of automatic control, in particular to a power supply control method, a power supply control device and power utilization equipment.
Background
In the power supply process of the electric equipment, the electric equipment often has the requirement of high-power supply, and along with the use of the electric equipment, the power line may have the phenomena of aging, poor contact and the like, so that the resistance is increased, and thus, the safety problems that the wire rod is ignited due to overheating and the like may be caused when the electric equipment is in a high-power working state.
Disclosure of Invention
The embodiment of the invention provides a power supply control method, a power supply control device and power utilization equipment, which are used for ensuring the safe power supply of the power utilization equipment.
A first aspect of an embodiment of the present invention provides a power supply control method, which is applied to an electric device, where the electric device is connected to a power supply terminal through a power line, and the power supply control method includes:
after the electric equipment is powered on and started, acquiring the input voltage and the output voltage of the power line;
determining the current resistance value of the power line according to the input voltage, the output voltage and the actual power of the electric equipment;
and executing corresponding control action on the electric equipment according to the resistance value.
A second aspect of the embodiments of the present invention provides a power supply control device, which is disposed in an electrical device, where the electrical device is connected to a power supply terminal through a power line; the power supply control device includes: a memory, a processor; wherein the memory has stored thereon executable code that, when executed by the processor, causes the processor to:
after the electric equipment is powered on and started, acquiring the input voltage and the output voltage of the power line; determining the current resistance value of the power line according to the input voltage, the output voltage and the actual power of the electric equipment; and executing corresponding control action on the electric equipment according to the resistance value.
A third aspect of an embodiment of the present invention provides an electric device, including:
the interface is used for being connected with a power line so as to enable the electric equipment to be connected into a power supply end through the power line;
the processor is coupled with the interface and used for acquiring the input voltage and the output voltage of the power line after the electric equipment is powered on and started; determining the current resistance value of the power line according to the input voltage, the output voltage and the actual power of the electric equipment; and executing corresponding control action on the electric equipment according to the resistance value.
In the power supply control scheme of the embodiment of the invention, the electric equipment is connected to the power supply end through the power line, so that the power supply end supplies power to the electric equipment through the power line. In order to ensure safe and reliable operation of the electric equipment, after the electric equipment is powered on and started, the electric equipment acquires the input voltage and the output voltage of the power line, so that the current resistance value of the power line is determined according to the input voltage, the output voltage and the actual power of the electric equipment. Then, the electric equipment executes corresponding control action based on the current resistance value of the power line. The resistance value of the power line is continuously detected in the using process of the electric equipment, so that corresponding power supply control is timely performed based on the resistance change of the power line, and the safety problem caused by high-power work of the electric equipment due to the fact that the resistance value of the power line is increased can be effectively avoided.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a power supply control system according to an embodiment of the present invention;
fig. 2 is a flowchart of a power supply control method according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a power supply control scenario according to an embodiment of the present invention;
fig. 4 is a flowchart of a power supply control method according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a power supply control scenario according to an embodiment of the present invention;
fig. 6 is a flowchart of a power supply control method according to an embodiment of the present invention;
fig. 7 is a flowchart of a power supply control method according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a power supply control device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of an electric device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The inventors have found that supplying power to an electrical consumer typically requires the use of a power cord (e.g., an AC cord), and that, in general, the resistance of the power cord is measured prior to use of the electrical consumer in order to determine a reasonable actual power of the electrical consumer based on the resistance to avoid damage to the power cord.
However, the resistance of the power supply line is no longer detected during use of the electrical consumer. As such, the power line may be aged or may have poor contact with the electric device, which may increase the resistance, and thus may cause a safety problem such as ignition due to overheating of the wire in a high-power operation state of the electric device.
Based on this, this application embodiment provides a power supply control scheme. In the power supply control scheme provided by the embodiment of the application, the electric equipment is connected to the power supply end through the power line, so that the power supply end supplies power to the electric equipment through the power line. In order to ensure safe and reliable operation of the electric equipment, after the electric equipment is powered on and started, the electric equipment acquires the input voltage and the output voltage of the power line, so that the current resistance value of the power line is determined according to the input voltage, the output voltage and the actual power of the electric equipment. Then, the electric equipment executes corresponding control action based on the current resistance value of the power line. The resistance value of the power line is continuously detected in the using process of the electric equipment, so that corresponding power supply control is timely performed based on the resistance change of the power line, and the safety problem caused by high-power work of the electric equipment due to the fact that the resistance value of the power line is increased can be effectively avoided.
First, an application scenario to which the power supply control method provided in the embodiment of the present invention may be applied is described below, as shown in fig. 1, the power supply control method may be applied to the power supply control system illustrated in fig. 1, where the power supply control system includes a power supply terminal, a power line, and a power consumption device.
As shown in fig. 1, the electric device is connected to the power supply terminal through a power line to supply power to the electric device through the power supply terminal.
In practice, the power cord includes a Direct Current (DC) power cord and an Alternating Current (AC) power cord. The ac power line is a wire through which ac power having a relatively high voltage is passed, and is generally suitable for electric equipment having a relatively high actual power. And the dc power supply line is a wire through which a dc power of a relatively low voltage is passed.
The power line in the embodiment of the invention can be an alternating current power line or a direct current power line.
The power supply control method provided by the embodiment of the present invention may be executed by the electric device illustrated in fig. 1, and in summary: after the electric equipment is started at power-on, the resistance value of the power line is continuously detected in the using process of the electric equipment, so that corresponding safety control operation is timely performed based on the change condition of the resistance value of the power line, and the safe and reliable operation of the electric equipment is ensured.
For example, the original purpose of using the above power supply control method for a difference in power supply lines may be the following case:
in a practical application situation, when a certain electric device uses an ac power line to access a power supply terminal, the actual power of the electric device generally using the ac power line is often high, and when the resistance of the ac power line is increased, if the actual power of the electric device is high, the ac power line may generate heat too high to burn out wires, which causes a safety problem. Therefore, the change of the resistance of the alternating current power line has great influence on the safe and reliable operation of the electric equipment.
In another practical application scenario, when a certain electric device uses a dc power line to access a power supply terminal, it may be required to accurately control the actual power of the electric device in a working scene of the electric device, and the actual power of the electric device is affected by a resistance value of the dc power line.
In the embodiment of the present invention, the electric device may be, for example, a battery charger, an air conditioner, or other high-power electric devices, but is not limited thereto.
In an optional embodiment, the power supply control method provided in the embodiment of the present invention may be applied to the following scenarios: the battery charging case of unmanned aerial vehicle (for example agricultural unmanned aerial vehicle etc.) can pass through the power cord and insert the power supply end. Be equipped with power module in battery charging box, need be full of the electricity for this power module to unmanned aerial vehicle can charge for the battery in the unmanned aerial vehicle through this battery charging box when field work. When the power module in the battery charging box is charged, the quick charging is needed to be realized, and the charging power is larger, so that the battery charging box is in a high-power working state, if the resistance of the power line connected with the battery charging box is increased, the risk of burning out the wire rod due to overhigh heating exists on the power line, and the safety problem is caused.
By implementing the power supply control scheme provided by the embodiment of the invention, the risk can be effectively overcome. In summary, when the battery charging box is started to charge the power module, the resistance value of the power line can be continuously and automatically detected, so as to timely perform corresponding safety control operation based on the resistance value of the power line, for example, when the resistance value of the power line is found to be increased to a certain degree, the actual power of the battery charging box is reduced, so as to ensure the charging safety of the power module and alleviate the phenomenon that the power line generates too high heat; for another example, when the resistance value of the power line is found to be increased to a higher certain degree, the power module is stopped to be charged, so that the power module is prevented from being damaged, and at the moment, relevant personnel can replace the power line and then continue to charge the power module.
Through the scheme, the battery charging box can be used for continuously detecting the resistance change condition of the power line automatically in the charging process of the power module, so that corresponding control actions can be made in time, manual intervention is not needed, the realization is simple and efficient, and the safe charging of the battery charging box on the power module is also ensured.
The core logic of the power supply control scheme executed by the electric equipment is briefly described above by taking the electric equipment as a battery charging box as an example, and the following detailed description is given to the process of executing the power supply control method by the electric equipment in fig. 1 in conjunction with some embodiments.
Fig. 2 is a flowchart of a power supply control method according to an embodiment of the present invention, and as shown in fig. 2, the power supply control method may include the following steps:
201. after the electric equipment is powered on and started, the electric equipment acquires the input voltage and the output voltage of a power line, wherein the electric equipment is connected to a power supply end through the power line.
202. And the electric equipment determines the current resistance value of the power line according to the input voltage and the output voltage of the power line and the actual power of the electric equipment.
203. And the electric equipment executes corresponding control action on the electric equipment according to the current resistance value of the power line.
The electric equipment starts normal operation after being powered on and started, and during the operation, for example, the input voltage and the output voltage of the power line, as well as the current actual power of the electric equipment can be acquired at regular time. The timed time interval is, for example, a set value of 5 minutes, 10 minutes, etc. Taking a time interval of 5 minutes as an example, the input voltage and the output voltage of the power line and the current actual power of the power line can be obtained every 5 minutes after the power-on start of the electric equipment.
First, the meaning of starting normal operation after the power-on start of the electric equipment is illustrated:
for example, the electric equipment is an air conditioner, and the normal operation of the electric equipment after being powered on and started is as follows: after the air conditioner is connected with a power supply (namely, connected with a power supply end, the power supply end supplies power to the air conditioner), the air conditioner is started to start the work of refrigeration/heating and the like.
For example, the electric device is a charger, specifically, a charger for charging a battery, for example, a charger for charging a battery for an unmanned aerial vehicle. At this time, the starting of normal operation after the power-on start of the electric equipment means that: after the charger is connected with a power supply (namely, connected with a power supply end, and the power supply end supplies power to the charger), and a battery to be charged is connected with the charger, the charger starts to charge the battery.
For the sake of understanding, the input voltage and the output voltage of the power supply line, and the current actual power acquisition result thereof are exemplarily described with reference to fig. 3. As shown in fig. 3, it is assumed that the input voltage of the power supply line acquired at time T1 is represented as U0, the output voltage of the power supply line is represented as U1, and the actual power of the electric device is represented as P1.
As can be understood from fig. 3, the input voltage U0 of the power line is the output voltage of the power supply terminal at this time, and several alternative ways of obtaining the input voltage U0 of the power line will be described below. The output voltage U1 of the power line is the input voltage of the electric device at this time, so the electric device can obtain U1 by detecting its own input voltage at time T1.
Based on the above assumed results, the resistance value R1 of the power line at time T1 can be calculated according to the following formula: r1 ═ (U0-U1)/(P1/U1).
The difference value between U0 and U1 is the voltage difference between two ends of the current power line, and P1/U1 is the current value flowing through the current power line.
After the resistance value R1 of the power line at the time T1 is obtained according to the formula, corresponding control actions can be executed on the electric equipment according to the resistance value R1 so as to ensure safe and reliable operation of the electric equipment.
Specifically, the electric device may perform a control action corresponding to the target resistance range on the electric device according to the target resistance range corresponding to the resistance value R1.
In practical applications, a plurality of resistance value intervals and control actions (i.e., control actions executed on the electric equipment) corresponding to each resistance value interval can be preset according to the resistance value of the power line, and the control actions corresponding to different resistance value intervals are different. The target resistance range corresponding to the resistance value R1 is one of the preset resistance ranges.
The control actions corresponding to different resistance value intervals are different, so that the influence degrees of different resistance values of the power line on the safe and reliable operation of the electric equipment are different. Based on this, optionally, after the target resistance range to which the resistance value R1 belongs is determined, the control action performed on the electric equipment corresponding to the target resistance range may include at least one of the following:
if the resistance value R1 corresponds to the first resistance value interval, controlling the electric equipment to work normally;
if the resistance value R1 corresponds to the second resistance value interval, controlling the electric equipment to output an alarm signal;
if the resistance value R1 corresponds to the third resistance value interval, the actual power of the electric equipment is reduced;
if the resistance value R1 corresponds to the fourth resistance value interval, controlling the electric equipment to stop working;
wherein, the first resistance interval, the second value interval, the third resistance interval and the fourth resistance interval are sequentially increased in an increasing manner.
In summary, when the current resistance R1 of the power line belongs to a normal resistance range (i.e., the first resistance range) that does not significantly affect the electric device, it can be considered that the resistance of the power line does not affect the safe operation of the electric device.
When the current resistance value R1 of the power line belongs to the second resistance value interval, it is described that the resistance value of the power line has risen to a certain extent, and it can be considered that the influence of the resistance value of the power line on the safe operation of the electric equipment is not large at this time, and the electric equipment can continue to operate with the original actual power, but the electric equipment needs to send an alarm signal, so that relevant personnel can take corresponding measures based on the alarm signal, for example, the working time of controlling the electric equipment is not too long, and the like.
When the current resistance value R1 of the power line belongs to the third resistance value interval, it indicates that the degree of the increase in the resistance value of the power line is higher, and at this time, the electric device cannot continue to operate with the original actual power, otherwise, the power line is overheated due to excessive power, which causes a safety problem, and therefore, the actual power of the electric device needs to be reduced based on the resistance value R1. Alternatively, a target power corresponding to the third resistance value interval may be preset, so that the actual power of the electric device may be reduced from P1 to the target power. Of course, optionally, the third resistance value interval may be divided into sub-resistance value intervals, a target power corresponding to each sub-resistance value interval is set, and the actual power of the electric device is determined to be reduced to the target power corresponding to the target sub-resistance value interval according to the target sub-resistance value interval to which the resistance value R1 belongs.
When the current resistance value R1 of the power line belongs to the higher fourth resistance value interval, it is described that the current resistance value of the power line cannot enable the electric equipment to work normally, and at this time, the electric equipment can be directly stopped to ensure the safety of the electric equipment. The power cord can be replaced by related personnel, and a new power cord is used for supplying power for the electric equipment.
In conclusion, in the use process after the power-on starting of the electric equipment, the detection of the resistance value of the power line can be realized, so that the corresponding power supply control can be timely performed based on the detection result of the resistance value of the power line, and the safety problem caused by the fact that the resistance value of the power line of the electric equipment is increased can be effectively avoided.
Fig. 4 is a flowchart of a power supply control method according to an embodiment of the present invention, and as shown in fig. 4, the power supply control method may include the following steps:
401. after the electric equipment is powered on and started, the electric equipment acquires the current first output voltage of the power line and acquires the first input voltage of the power line before the electric equipment is powered on and started, wherein the electric equipment is connected to the power supply end through the power line.
402. And the electric equipment determines the current first resistance value of the power line according to the first input voltage, the first output voltage and the first actual power of the electric equipment.
403. And the electric equipment executes corresponding control action on the electric equipment according to the current first resistance value of the power line.
Optionally, the power supply control method provided in this embodiment may be executed in a short time after the power-on start of the power-using device, which is simply: the power supply control method is executed immediately after the power-on start of the electric equipment. Therefore, after the electric equipment is powered on and started, the electric equipment can be safely powered on and controlled based on the current resistance value of the power line, so that the use process of the subsequent electric equipment is ensured to have a reliable operation premise.
The obtaining of the first input voltage of the power line before the power-on start of the electrical device may be implemented as:
acquiring output voltage of a power line before the power-on start of the electric equipment;
the output voltage of the power line acquired before the power utilization equipment is powered on and started is determined to be used as the first input voltage of the power line.
The first input voltage of the power line before the power-on start of the electric equipment refers to: the input voltage of the power line when the consumer is in the idle state (i.e. the output voltage of the power supply terminal at this time).
The power consumption device is in an idle state, which may be a state where the power consumption device is connected to the power supply terminal through a power line, but is not powered on and started.
For ease of understanding, the description is exemplified in conjunction with fig. 5.
In fig. 5, first, when the electric device is not powered on, that is, in an idle state, the electric device is connected to the power supply terminal through the power line, and assuming that the time is T0, the electric device may detect the input voltage of the electric device at this time, that is, the output voltage of the power line. According to the open circuit voltage principle, the output voltage of the power line at this time is also the input voltage of the power line (i.e. the first input voltage), i.e. the output voltage of the power supply terminal at this time. Assuming that the output voltage of the power supply terminal is U0, the first input voltage of the power line is U0.
Then, at time T1, the electric device is powered on, i.e., is in a state of load operation, at this time, the electric device again detects its own input voltage as the first output voltage of the power line, and it is assumed that the detected first output voltage is U1. The powered device detects its current first actual power, which is assumed to be P1.
After obtaining the first input voltage U0, the first output voltage U1, and the first actual power P1, the electric device may calculate the resistance value R1 of the power line at the time T1 according to the following formula:
R1＝(U0-U1)/(P1/U1)。
after that, the corresponding control action is executed on the electric device based on the resistance value R1 of the power line, which may specifically refer to the related descriptions in the foregoing other embodiments and will not be described herein.
It is understood that after obtaining the first input voltage U0 of the power line in the unpowered state of the powered device, the powered device may store the first input voltage U0, so as to directly read the stored first input voltage U0 for subsequent calculation after subsequent power-on start.
Therefore, the electric equipment can automatically detect the resistance value of the power line based on the automatic detection of the input voltage in no-load, the input voltage in load operation and the actual power in load operation, so that the corresponding control action is executed based on the detected resistance value of the power line, and the safe operation of the electric equipment is ensured.
Fig. 6 is a flowchart of a power supply control method according to an embodiment of the present invention, and as shown in fig. 6, the power supply control method may include the following steps:
601. after the electric equipment is powered on and started, if the descending amplitude of the output voltage of the power line meets the set condition, the actual power of the electric equipment is reduced to be second actual power, and the current second output voltage of the power line is obtained, wherein the electric equipment is connected to the power supply end through the power line.
602. And turning off the electric equipment, wherein the electric equipment acquires a second input voltage of the power line when the electric equipment is in the off state.
603. And the electric equipment determines the current second resistance value of the power line according to the second input voltage, the second output voltage and the second actual power.
604. And the electric equipment executes corresponding control action on the electric equipment according to the current second resistance value of the power line.
The present embodiment may be continued after the embodiment shown in fig. 4 is performed, that is, after the electric device is controlled according to the first resistance value of the power line, if the output voltage of the power line is detected subsequently, and the magnitude of the drop of the output voltage of the power line from the first output voltage (at this time, the first output voltage serves as the reference voltage) at time T2 is found to satisfy the setting condition, the actual power of the electric device is reduced from the first actual power to the second actual power, which is denoted as P2, and after the actual power is reduced, the input voltage of the electric device is detected again as the current second output voltage of the power line, which is denoted as U2.
Of course, the scheme provided by this embodiment may also be implemented independently of the scheme provided by the embodiment shown in fig. 4, that is, when the electrical device is powered on and started, the input voltage of the electrical device is detected as the output voltage of the power line at this time, the output voltage is used as the reference voltage, then the output voltages of the power line at different times can be obtained by detecting the input voltage of the electrical device at regular time intervals, when the decrease amplitude of the output voltage of the power line compared with the reference voltage at a certain time (for example, at time T2) is found to satisfy the set condition, the actual power of the electrical device is reduced to the second actual power P2, and after the actual power is reduced, the input voltage of the electrical device is detected again as the current second output voltage U2 of the power line.
Wherein, the setting conditions may be: the output voltage of the power line is reduced from the reference voltage by a magnitude larger than a set threshold.
Optionally, turning down the actual power of the powered device to a second actual power includes:
determining second actual power according to a corresponding relation between the preset output voltage of the power line and the actual power of the electric equipment; wherein, the smaller the output voltage of the power line, the smaller the actual power of the electric equipment.
That is, the reduction amplitude of the actual power of the electric device can be determined according to the degree of the drop of the output voltage of the power supply line: the larger the reduction degree of the output voltage of the power line is, the larger the reduction amplitude of the actual power of the electric equipment is; conversely, the smaller the reduction degree of the output voltage of the power line, the smaller the reduction range of the actual power of the electric equipment.
In order to determine the resistance value of the power line at time T2, in addition to the above-mentioned second output voltage U2 of the power line and the second actual power P2 of the consumer at that time, a second input voltage of the power line at time T2, which is assumed to be denoted as U0', needs to be obtained.
In order to obtain the second input voltage U0 'of the power line at the time T2, optionally, the electric device may be turned off first, so that the electric device is in an unloaded state without being powered on, and then the electric device detects the input voltage of the electric device at this time as the second input voltage U0' of the power line when the electric device is in the off state.
Then, the electric device calculates a second resistance value R2 of the power line at time T2 according to the following formula:
R2＝(U0’-U2)/(P2/U2)。
then, the electric equipment performs a corresponding control operation on the electric equipment according to the second resistance value R2 of the power supply line. For a specific control action execution process, reference may be made to the related description in the foregoing embodiments, which is not described herein again.
Fig. 7 is a flowchart of a power supply control method according to an embodiment of the present invention, and as shown in fig. 7, the power supply control method may include the following steps:
701. after the electric equipment is powered on and started, if the descending amplitude of the output voltage of the power line meets the set condition, the actual power of the electric equipment is reduced to be second actual power, and the current second output voltage of the power line is obtained, wherein the electric equipment is connected to the power supply end through the power line.
702. And continuously reducing the actual power of the electric equipment to be third actual power within the preset time by the electric equipment, and acquiring the current third output voltage of the power line.
703. And determining the input voltage of the power line as a preset variable by the electric equipment, and determining the current second resistance value of the power line according to the preset variable, the second output voltage, the second actual power, the third output voltage and the third actual power.
704. And the electric equipment executes corresponding control action on the electric equipment according to the current second resistance value of the power line.
In the scheme provided by the embodiment shown in fig. 6, in the working process after the electrical device is powered on and started, when it is found at time T2 that the drop amplitude of the output voltage of the power line meets the set condition, the electrical device needs to be turned off to obtain the input voltage of the power line corresponding to time T2, which may affect the normal use process of the electrical device and affect the user experience. For this purpose, the solution in the present embodiment is provided. In the solution provided by this embodiment, there is no need to detect the input voltage of the power line.
In this embodiment, it is assumed that the actual power of the electric device is reduced to the second actual power P2 after the decrease of the output voltage of the power line from the reference voltage at time T2 is found to satisfy the set condition, and the input voltage of the electric device is detected again as the current second output voltage U2 of the power line after the actual power is reduced.
Based on the assumption that the output voltage of the power supply terminal, i.e., the input voltage of the power line, is stable and does not change in a short time, at the subsequent time T3, the electric device continues to reduce the actual power of the electric device to the third actual power P3, and after reducing the actual power, the input voltage of the electric device is detected again as the current third output voltage U3 of the power line. Wherein, the difference value between the time T3 and the time T2 is within the preset time.
Since the input voltage of the power supply line is assumed to be constant during the time T2 to the time T3, the input voltage of the power supply line can be expressed as a preset variable, assumed to be Ux.
Then, the electric device may determine the current second resistance value R2 of the power line according to the preset variable Ux, the second output voltage U2, the second actual power P2, the third output voltage U3, and the third actual power P3.
Specifically, a first formula for solving the second resistance value R2 may be determined according to the preset variable Ux, the second output voltage U2 and the second actual power P2: ux R2 × P2/U2+ U2.
The second formula of R2 for solving the second resistance value may be determined according to the preset variable Ux, the third output voltage U3, and the third actual power P3: ux R2 × P3/U3+ U3.
Finally, based on the first formula and the second formula, the second resistance value R2 is determined.
Then, the electric equipment performs a corresponding control operation on the electric equipment according to the second resistance value R2 of the power supply line. For a specific control action execution process, reference may be made to the related description in the foregoing embodiments, which is not described herein again.
In summary, the scheme provided by the embodiment of the invention can continuously detect the resistance value of the power line when the electric equipment runs, and if the resistance value of the power line changes, safety control measures such as adjusting the power of the electric equipment can be timely made, so that the situation that the power line is heated due to overlarge resistance value when the electric equipment runs at high power, and further, wires are burnt out to cause fire disasters is prevented.
Fig. 8 is a schematic structural diagram of a power supply control device according to an embodiment of the present invention, where the power supply control device is disposed in an electric device, and the electric device is connected to a power supply terminal through a power line. As shown in fig. 8, the power supply control device includes: memory 11, processor 12. Wherein the memory 11 has stored thereon executable code which, when executed by the processor 12, causes the processor 12 to implement:
after the electric equipment is powered on and started, acquiring the input voltage and the output voltage of the power line; determining the current resistance value of the power line according to the input voltage, the output voltage and the actual power of the electric equipment; and executing corresponding control action on the electric equipment according to the resistance value.
Optionally, in the process of executing a corresponding control action on the electrical device, the processor 12 is specifically configured to: and executing control actions corresponding to the target resistance value interval on the electric equipment according to the target resistance value interval corresponding to the resistance value, wherein the target resistance value interval is one of a plurality of preset resistance value intervals, and the control actions corresponding to different resistance value intervals are different.
Optionally, the processor 12 is specifically configured to execute at least one of the following:
if the resistance value corresponds to a first resistance value interval, controlling the electric equipment to normally work;
if the resistance value corresponds to a second resistance value interval, controlling the electric equipment to output an alarm signal;
if the resistance value corresponds to a third resistance value interval, reducing the actual power of the electric equipment;
if the resistance value corresponds to a fourth resistance value interval, controlling the electric equipment to stop working;
the first resistance interval, the second resistance interval, the third resistance interval and the fourth resistance interval are sequentially increased in number.
Optionally, the processor 12 may be specifically configured to: after the electric equipment is powered on and started, obtaining a current first output voltage of the power line, obtaining a first input voltage of the power line before the electric equipment is powered on and started, and determining a current first resistance value of the power line according to the first input voltage, the first output voltage and first actual power of the electric equipment.
Optionally, in the process of acquiring the first input voltage of the power line before the electrical device is powered on and started, the processor 12 is specifically configured to: acquiring the output voltage of the power line before the power-on starting of the electric equipment; determining the output voltage of the power line acquired before the power utilization equipment is powered on and started as the first input voltage of the power line.
Optionally, in the process of acquiring the input voltage and the output voltage of the power line after the electrical device is powered on and started, the processor 12 is further configured to: after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
continuously reducing the actual power of the electric equipment to be third actual power within preset time, and acquiring a current third output voltage of the power line;
and determining the input voltage of the power line as a preset variable.
Based on this, the processor 12 is further configured to: and determining a current second resistance value of the power line according to the preset variable, the second output voltage, the second actual power, the third output voltage and the third actual power.
Wherein, in particular, the processor 12 is specifically configured to: determining a first formula for solving the second resistance value according to the preset variable, the second output voltage and the second actual power; determining a second formula for solving the second resistance value according to the preset variable, the third output voltage and the third actual power; and determining the second resistance value according to the first formula and the second formula.
In addition, optionally, in the process of acquiring the input voltage and the output voltage of the power line after the electrical device is powered on and started, the processor 12 is further configured to: after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
turning off the electric equipment;
acquiring a second input voltage of the power line when the electric equipment is in a closed state.
Based on this, the processor 12 is further configured to: and determining a current second resistance value of the power line according to the second input voltage, the second output voltage and the second actual power.
Optionally, in the process of reducing the actual power of the electric device to the second actual power, the processor 12 is specifically configured to: determining the second actual power according to a preset corresponding relation between the output voltage of the power line and the actual power of the electric equipment; wherein the smaller the output voltage of the power line, the smaller the actual power of the electric device.
In this embodiment, the processor 12 may be a Central Processing Unit (CPU), or may be another type of processor, such as a logic programmable chip, for example, a CPLD, an FPGA, or the like.
For a specific implementation process of the power supply control device shown in fig. 8 in the power supply control process, reference may be made to the related descriptions in the foregoing other embodiments, which are not repeated herein.
Fig. 9 is a schematic structural diagram of an electric device according to an embodiment of the present invention, and as shown in fig. 9, the electric device includes:
and the interface 21 is used for being connected with a power line so as to enable the electric equipment to be connected into a power supply end through the power line.
The processor 22 is coupled with the interface 21 and is used for acquiring the input voltage and the output voltage of the power line after the electric equipment is powered on and started; determining the current resistance value of the power line according to the input voltage, the output voltage and the actual power of the electric equipment; and executing corresponding control action on the electric equipment according to the resistance value.
Optionally, in the process of executing a corresponding control action on the electrical device, the processor 22 is specifically configured to: and executing control actions corresponding to the target resistance value interval on the electric equipment according to the target resistance value interval corresponding to the resistance value, wherein the target resistance value interval is one of a plurality of preset resistance value intervals, and the control actions corresponding to different resistance value intervals are different.
Optionally, the processor 22 is specifically configured to execute at least one of the following:
if the resistance value corresponds to a first resistance value interval, controlling the electric equipment to normally work;
if the resistance value corresponds to a second resistance value interval, controlling the electric equipment to output an alarm signal;
if the resistance value corresponds to a third resistance value interval, reducing the actual power of the electric equipment;
if the resistance value corresponds to a fourth resistance value interval, controlling the electric equipment to stop working;
the first resistance interval, the second resistance interval, the third resistance interval and the fourth resistance interval are sequentially increased in number.
Optionally, the processor 22 may be specifically configured to: after the electric equipment is powered on and started, obtaining a current first output voltage of the power line, obtaining a first input voltage of the power line before the electric equipment is powered on and started, and determining a current first resistance value of the power line according to the first input voltage, the first output voltage and first actual power of the electric equipment.
Optionally, in the process of acquiring the first input voltage of the power line before the electrical device is powered on and started, the processor 22 is specifically configured to: acquiring the output voltage of the power line before the power-on starting of the electric equipment; determining the output voltage of the power line acquired before the power utilization equipment is powered on and started as the first input voltage of the power line.
Optionally, in the process of acquiring the input voltage and the output voltage of the power line after the electrical device is powered on and started, the processor 22 is further configured to: after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
continuously reducing the actual power of the electric equipment to be third actual power within preset time, and acquiring a current third output voltage of the power line;
and determining the input voltage of the power line as a preset variable.
Based thereon, the processor 22 is further configured to: and determining a current second resistance value of the power line according to the preset variable, the second output voltage, the second actual power, the third output voltage and the third actual power.
Wherein, in particular, the processor 22 is specifically configured to: determining a first formula for solving the second resistance value according to the preset variable, the second output voltage and the second actual power; determining a second formula for solving the second resistance value according to the preset variable, the third output voltage and the third actual power; and determining the second resistance value according to the first formula and the second formula.
In addition, optionally, in the process of acquiring the input voltage and the output voltage of the power line after the electrical device is powered on and started, the processor 22 is further configured to: after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
turning off the electric equipment;
acquiring a second input voltage of the power line when the electric equipment is in a closed state.
Based thereon, the processor 22 is further configured to: and determining a current second resistance value of the power line according to the second input voltage, the second output voltage and the second actual power.
Optionally, in the process of reducing the actual power of the electric device to the second actual power, the processor 22 is specifically configured to: determining the second actual power according to a preset corresponding relation between the output voltage of the power line and the actual power of the electric equipment; wherein the smaller the output voltage of the power line, the smaller the actual power of the electric device.
In practical application, according to the difference of electric equipment, it can also contain other components and parts, and is not described in detail.
The power supply device may be a charger for charging an object such as a battery, or may be other electronic devices such as an air conditioner.
For a specific implementation process of the power consumption device shown in fig. 9 in the power supply control process, reference may be made to the related descriptions in the foregoing other embodiments, which are not repeated herein.
In addition, an embodiment of the present invention further provides a computer-readable storage medium, where executable codes are stored in the computer-readable storage medium, and the executable codes are used to implement the power supply control method provided in each of the foregoing embodiments.
The technical solutions and the technical features in the above embodiments may be used alone or in combination without conflict, and all embodiments that fall within the scope of the present application are equivalent embodiments within the scope of the present application as long as they do not exceed the knowledge of those skilled in the art.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (37)
1. A power supply control method is applied to electric equipment, wherein the electric equipment is connected to a power supply end through a power line, and the method comprises the following steps:
after the electric equipment is powered on and started, acquiring the input voltage and the output voltage of the power line;
determining the current resistance value of the power line according to the input voltage, the output voltage and the actual power of the electric equipment;
and executing corresponding control action on the electric equipment according to the resistance value.
2. The method of claim 1, wherein performing a corresponding control action on the powered device based on the resistance value comprises:
and executing control actions corresponding to the target resistance value interval on the electric equipment according to the target resistance value interval corresponding to the resistance value, wherein the target resistance value interval is one of a plurality of preset resistance value intervals, and the control actions corresponding to different resistance value intervals are different.
3. The method according to claim 2, wherein the performing of the control action corresponding to the target resistance interval on the electric device according to the target resistance interval corresponding to the resistance value comprises at least one of the following:
if the resistance value corresponds to a first resistance value interval, controlling the electric equipment to normally work;
if the resistance value corresponds to a second resistance value interval, controlling the electric equipment to output an alarm signal;
if the resistance value corresponds to a third resistance value interval, reducing the actual power of the electric equipment;
if the resistance value corresponds to a fourth resistance value interval, controlling the electric equipment to stop working;
the first resistance interval, the second resistance interval, the third resistance interval and the fourth resistance interval are sequentially increased in number.
4. The method of claim 1, wherein obtaining the input voltage and the output voltage of the power line after the powered device is powered on and started comprises:
after the electric equipment is powered on and started, acquiring a current first output voltage of the power line;
and acquiring a first input voltage of the power line before the power utilization equipment is powered on and started.
5. The method of claim 4, wherein the determining the present resistance value of the power line comprises:
and determining a current first resistance value of the power line according to the first input voltage, the first output voltage and the first actual power of the electric equipment.
6. The method of claim 4, wherein obtaining the first input voltage of the power line before power-up of the powered device comprises:
acquiring the output voltage of the power line before the power-on starting of the electric equipment;
determining the output voltage of the power line acquired before the power utilization equipment is powered on and started as the first input voltage of the power line.
7. The method according to any one of claims 1 to 6, wherein the obtaining the input voltage and the output voltage of the power line after the power-on start of the electric device comprises:
after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
continuously reducing the actual power of the electric equipment to be third actual power within preset time, and acquiring a current third output voltage of the power line;
and determining the input voltage of the power line as a preset variable.
8. The method of claim 7, wherein determining the present resistance value of the power line comprises:
and determining a current second resistance value of the power line according to the preset variable, the second output voltage, the second actual power, the third output voltage and the third actual power.
9. The method of claim 8, wherein determining a current second resistance value of the power line according to the first input voltage, the second output voltage, the second actual power, the third output voltage, and the third actual power comprises:
determining a first formula for solving the second resistance value according to the preset variable, the second output voltage and the second actual power;
determining a second formula for solving the second resistance value according to the preset variable, the third output voltage and the third actual power;
and determining the second resistance value according to the first formula and the second formula.
10. The method according to any one of claims 1 to 6, wherein the obtaining the input voltage and the output voltage of the power line after the power-on start of the electric device comprises:
after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
turning off the electric equipment;
acquiring a second input voltage of the power line when the electric equipment is in a closed state.
11. The method of claim 10, wherein determining the present resistance value of the power line comprises:
and determining a current second resistance value of the power line according to the second input voltage, the second output voltage and the second actual power.
12. The method of claim 7 or 10, wherein the reducing the actual power of the powered device to a second actual power comprises:
determining the second actual power according to a preset corresponding relation between the output voltage of the power line and the actual power of the electric equipment; wherein the smaller the output voltage of the power line, the smaller the actual power of the electric device.
13. A power supply control device is characterized by being arranged on electric equipment, wherein the electric equipment is connected to a power supply end through a power line;
the power supply control device includes: a memory, a processor; wherein the memory has stored thereon executable code that, when executed by the processor, causes the processor to:
after the electric equipment is powered on and started, acquiring the input voltage and the output voltage of the power line; determining the current resistance value of the power line according to the input voltage, the output voltage and the actual power of the electric equipment; and executing corresponding control action on the electric equipment according to the resistance value.
14. The apparatus of claim 13, wherein the processor is specifically configured to:
and executing control actions corresponding to the target resistance value interval on the electric equipment according to the target resistance value interval corresponding to the resistance value, wherein the target resistance value interval is one of a plurality of preset resistance value intervals, and the control actions corresponding to different resistance value intervals are different.
15. The apparatus of claim 14, wherein the processor is specifically configured to perform at least one of:
if the resistance value corresponds to a first resistance value interval, controlling the electric equipment to normally work;
if the resistance value corresponds to a second resistance value interval, controlling the electric equipment to output an alarm signal;
if the resistance value corresponds to a third resistance value interval, reducing the actual power of the electric equipment;
if the resistance value corresponds to a fourth resistance value interval, controlling the electric equipment to stop working;
the first resistance interval, the second resistance interval, the third resistance interval and the fourth resistance interval are sequentially increased in number.
16. The apparatus of claim 13, wherein the processor is specifically configured to:
after the electric equipment is powered on and started, acquiring a current first output voltage of the power line;
and acquiring a first input voltage of the power line before the power utilization equipment is powered on and started.
17. The apparatus of claim 16, wherein the processor is specifically configured to:
and determining a current first resistance value of the power line according to the first input voltage, the first output voltage and the first actual power of the electric equipment.
18. The apparatus according to claim 16, wherein in obtaining the first input voltage of the power line before the power-up of the powered device is started, the processor is specifically configured to:
acquiring the output voltage of the power line before the power-on starting of the electric equipment;
determining the output voltage of the power line acquired before the power utilization equipment is powered on and started as the first input voltage of the power line.
19. The apparatus according to any one of claims 13 to 18, wherein in acquiring the input voltage and the output voltage of the power line after the power-on start of the electrical device, the processor is further configured to:
after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
continuously reducing the actual power of the electric equipment to be third actual power within preset time, and acquiring a current third output voltage of the power line;
and determining the input voltage of the power line as a preset variable.
20. The apparatus of claim 19, wherein the processor is further configured to:
and determining a current second resistance value of the power line according to the preset variable, the second output voltage, the second actual power, the third output voltage and the third actual power.
21. The apparatus of claim 20, wherein the processor is specifically configured to:
determining a first formula for solving the second resistance value according to the preset variable, the second output voltage and the second actual power;
determining a second formula for solving the second resistance value according to the preset variable, the third output voltage and the third actual power;
and determining the second resistance value according to the first formula and the second formula.
22. The apparatus according to any one of claims 13 to 18, wherein in acquiring the input voltage and the output voltage of the power line after the power-on start of the electrical device, the processor is further configured to:
after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
turning off the electric equipment;
acquiring a second input voltage of the power line when the electric equipment is in a closed state.
23. The apparatus of claim 22, wherein the processor is further configured to:
and determining a current second resistance value of the power line according to the second input voltage, the second output voltage and the second actual power.
24. The apparatus according to claim 19 or 22, wherein in the process of turning down the actual power of the powered device to the second actual power, the processor is specifically configured to:
determining the second actual power according to a preset corresponding relation between the output voltage of the power line and the actual power of the electric equipment; wherein the smaller the output voltage of the power line, the smaller the actual power of the electric device.
25. An electrical device, comprising:
the interface is used for being connected with a power line so as to enable the electric equipment to be connected into a power supply end through the power line;
the processor is coupled with the interface and used for acquiring the input voltage and the output voltage of the power line after the electric equipment is powered on and started; determining the current resistance value of the power line according to the input voltage, the output voltage and the actual power of the electric equipment; and executing corresponding control action on the electric equipment according to the resistance value.
26. The device of claim 25, wherein the processor is specifically configured to:
and executing control actions corresponding to the target resistance value interval on the electric equipment according to the target resistance value interval corresponding to the resistance value, wherein the target resistance value interval is one of a plurality of preset resistance value intervals, and the control actions corresponding to different resistance value intervals are different.
27. The apparatus of claim 26, wherein the processor is specifically configured to perform at least one of:
if the resistance value corresponds to a first resistance value interval, controlling the electric equipment to normally work;
if the resistance value corresponds to a second resistance value interval, controlling the electric equipment to output an alarm signal;
if the resistance value corresponds to a third resistance value interval, reducing the actual power of the electric equipment;
if the resistance value corresponds to a fourth resistance value interval, controlling the electric equipment to stop working;
the first resistance interval, the second resistance interval, the third resistance interval and the fourth resistance interval are sequentially increased in number.
28. The device of claim 25, wherein the processor is specifically configured to:
after the electric equipment is powered on and started, acquiring a current first output voltage of the power line;
and acquiring a first input voltage of the power line before the power utilization equipment is powered on and started.
29. The device of claim 28, wherein the processor is specifically configured to:
and determining a current first resistance value of the power line according to the first input voltage, the first output voltage and the first actual power of the electric equipment.
30. The device of claim 28, wherein in obtaining the first input voltage of the power line before the powered device is powered on and started, the processor is specifically configured to:
acquiring the output voltage of the power line before the power-on starting of the electric equipment;
determining the output voltage of the power line acquired before the power utilization equipment is powered on and started as the first input voltage of the power line.
31. The device according to any one of claims 25 to 30, wherein in acquiring the input voltage and the output voltage of the power line after the power-on start of the electrical device, the processor is further configured to:
after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
continuously reducing the actual power of the electric equipment to be third actual power within preset time, and acquiring a current third output voltage of the power line;
and determining the input voltage of the power line as a preset variable.
32. The device of claim 31, wherein the processor is further configured to:
and determining a current second resistance value of the power line according to the preset variable, the second output voltage, the second actual power, the third output voltage and the third actual power.
33. The device of claim 32, wherein the processor is specifically configured to:
determining a first formula for solving the second resistance value according to the preset variable, the second output voltage and the second actual power;
determining a second formula for solving the second resistance value according to the preset variable, the third output voltage and the third actual power;
and determining the second resistance value according to the first formula and the second formula.
34. The device according to any one of claims 25 to 30, wherein in acquiring the input voltage and the output voltage of the power line after the power-on start of the electrical device, the processor is further configured to:
after the power utilization equipment is powered on and started, the following steps are executed:
if the descending amplitude of the output voltage of the power line meets a set condition, reducing the actual power of the electric equipment to be second actual power, and acquiring the current second output voltage of the power line;
turning off the electric equipment;
acquiring a second input voltage of the power line when the electric equipment is in a closed state.
35. The device of claim 34, wherein the processor is further configured to:
and determining a current second resistance value of the power line according to the second input voltage, the second output voltage and the second actual power.
36. The device according to claim 31 or 34, wherein in the process of reducing the actual power of the powered device to the second actual power, the processor is specifically configured to:
determining the second actual power according to a preset corresponding relation between the output voltage of the power line and the actual power of the electric equipment; wherein the smaller the output voltage of the power line, the smaller the actual power of the electric device.
37. The apparatus of any one of claims 25 to 36, wherein the powered device comprises: a charger.
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| Application Number | Priority Date | Filing Date | Title |
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| PCT/CN2020/124824 WO2022087961A1 (en) | 2020-10-29 | 2020-10-29 | Power supply control method and apparatus, and electric device |
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| CN113574488A true CN113574488A (en) | 2021-10-29 |
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Application publication date: 20211029 |