CN117977531A - Self-adaptive power supply device, system and method - Google Patents
Self-adaptive power supply device, system and method Download PDFInfo
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Abstract
The application relates to an adaptive power supply device, an adaptive power supply system and an adaptive power supply method. The main control adjusting module is used for controlling the connection conduction state between the mode switching circuit and the constant current source circuit as well as between the mode switching circuit and the power supply circuit, controlling the power supply state of the electric equipment, and acquiring the path resistance of the power supply cable when the mode switching circuit connects and conducts the constant current source circuit, the power supply cable and the electric equipment to form a detection loop, so that the problem that the receiving voltages of the electric equipment are different due to the difference of the material lengths of the power supply cables is solved, and the measurement of the path resistance of the power supply wiring under different scenes is satisfied. Meanwhile, when the mode switching circuit connects and conducts the power supply circuit, the power supply cable and the electric equipment to form a power supply loop, the working voltage of the electric equipment is measured, and the power supply voltage is regulated according to the working voltage so as to regulate the working voltage to a preset voltage interval, thereby solving the problem of abnormal working of the electric equipment caused by the difference of the material length of the power supply cable due to the fixed output voltage of the existing power supply.
Description
Technical Field
The present application relates to the field of power supply technologies, and in particular, to an adaptive power supply device, system, and method.
Background
The electrical equipment needs to work in a specified voltage range, and the voltage range is lower than or higher than the required voltage range, so that the electronic equipment can work abnormally or be damaged.
In an actual use environment, a power supply of electric equipment is likely to be far away, and under the condition that the output voltage of the power supply is fixed, due to voltage drop on a transmission line, the voltage received by electronic equipment can be reduced, and the electronic equipment cannot work normally due to the fact that the voltage is too low.
In order to adapt to a long-distance power supply environment, one method is to artificially increase the voltage of a power supply, but after the power supply is replaced by a short wire, the voltage of an electronic equipment terminal is higher than a normal voltage range, and the electronic equipment is at risk of damage and unnecessary loss. The irradiation-resistant camera is used, the irradiation-resistant performance of the whole system is improved by considering the irradiation-resistant performance difference of electronic devices, the irradiation-resistant camera is placed in a nuclear radiation area, a power supply is placed in a non-radiation area in a drawing way, the wire length is tens or even hundreds of meters, and the abnormal risk of the operation of the camera is caused by the voltage drop of a cable.
Disclosure of Invention
Accordingly, it is necessary to provide an adaptive power supply device, system and method for solving the problems of abnormal operation of the electric equipment, uncontrollable power consumption and the like caused by the fixed output voltage of the power supply device and the difference of the material lengths of the power supply lines.
In a first aspect, the present application provides an adaptive power supply device connected to an electric device through a power supply cable, the device comprising:
the mode switching circuit is connected with the electric equipment through a power supply cable and is used for switching the power supply state of the electric equipment;
the constant current source circuit is connected with the mode switching circuit and used for outputting detection current;
a power supply circuit connected with the mode switching circuit and used for outputting a power supply voltage;
The main control adjusting module is connected with the power supply circuit and the mode switching circuit and used for controlling the mode switching circuit to connect and conduct the constant current source circuit, the power supply cable and the electric equipment to form a detection loop; measuring the path resistance of the power supply cable based on the acquired detection voltage and the detection current on the detection loop; and
The mode switching circuit is controlled to connect and conduct the power supply circuit, the power supply cable and the electric equipment to form a power supply loop; and measuring the working voltage of the electric equipment based on the acquired power supply voltage and power supply current on the power supply loop and the path resistance of the power supply cable, and adjusting the power supply voltage according to the working voltage so as to adjust the working voltage to a preset voltage interval.
In one embodiment, the adaptive power supply device further comprises:
the first sampling circuit is connected to a connecting path between the mode switching circuit and the power supply circuit and is used for collecting the power supply voltage and the power supply current;
and the second sampling circuit is connected to a connecting path of the mode switching circuit and the constant current source circuit and is used for collecting detection voltage between the mode switching circuit and the constant current source circuit.
In one embodiment, the master control adjustment module includes:
the adjusting controller is connected with the first sampling circuit and the second sampling circuit and is used for detecting voltage on the detection loop, measuring the path resistance of the power supply cable, acquiring the power supply voltage and the power supply current on the power supply loop and measuring the working voltage of the electric equipment;
And the dynamic adjusting circuit is connected with the power supply circuit and the adjusting controller and is used for dynamically adjusting the power supply voltage until the working voltage is in a preset voltage interval.
In one embodiment, the dynamic regulation circuit comprises a resistor R1 and a capacitor C1 connected in series between the regulation controller and a common ground, and an intermediate node of the resistor R1 and the capacitor C1 is connected to the power supply circuit.
In one embodiment, the adjustment controller is further configured to: when the working voltage is smaller than a preset voltage interval, the duty ratio of square waves in the output PWM pulse signal is controlled to be increased, and the power supply voltage is raised; when the working voltage is larger than a preset voltage interval, the duty ratio of square waves in the PWM pulse signal which is controlled to be output is reduced, and the power supply voltage is reduced.
In one embodiment, the mode switching circuit includes a first relay and a second relay,
A first pin of the first relay is connected with a power line in the power supply cable, a second pin of the first relay is connected with the power supply circuit, and a third pin of the first relay is connected with a common ground and is used for connecting a power supply voltage output by the power supply circuit into the power supply loop;
And a fourth pin of the second relay is connected with a ground wire in the power supply cable, a fifth pin of the second relay is connected with the public ground, and a sixth pin of the second relay is connected with the constant current source circuit and is used for connecting detection current output by the constant current source circuit into the detection loop.
In a second aspect, the present application further provides an adaptive power supply system, including an electric device and an adaptive power supply apparatus according to the first aspect, where the electric device includes an internal load and a load protection circuit, and the load protection circuit is connected between the internal load and the power supply cable, and is configured to control the detection current to be cut off at two ends of the internal load when the constant current source circuit, the power supply cable, and the electric device are connected and turned on to form a detection loop.
In one embodiment, the power supply cable includes a power supply line and a ground line, the load protection circuit includes a diode D1 and a diode D2, the anode of the diode D1 is connected to the power supply line, the cathode of the diode D1 is connected to the internal load, the anode of the diode D2 is connected to the ground line, and the cathode of the diode D2 is connected to the anode of the diode D1.
In a third aspect, the present application further provides an adaptive power supply method, applied to the adaptive power supply device according to the first aspect, where the method includes:
The control mode switching circuit connects and conducts the constant current source circuit, the power supply cable and the electric equipment to form a detection loop; measuring the path resistance of the power supply cable based on the acquired detection voltage and the detection current on the detection loop;
The control mode switching circuit connects and conducts the power supply circuit, the power supply cable and the electric equipment to form a power supply loop; and measuring the working voltage of the electric equipment based on the acquired power supply voltage and power supply current on the power supply loop and the path resistance of the power supply cable, and adjusting the power supply voltage according to the working voltage so as to adjust the working voltage to a preset voltage interval.
In one embodiment, the adjusting the power supply voltage according to the operating voltage to adjust the operating voltage to a preset voltage interval includes:
When the working voltage is smaller than a preset voltage interval, the duty ratio of square waves in the output PWM pulse signal is controlled to be increased, and the power supply voltage of the power supply circuit is raised;
When the working voltage is larger than a preset voltage interval, the duty ratio of square waves in the PWM pulse signal which is controlled to be output is reduced, and the power supply voltage of the power supply circuit is reduced.
In the self-adaptive power supply device, the system and the method, the connection conduction state between the mode switching circuit and the constant current source circuit as well as between the mode switching circuit and the power supply circuit is controlled through the main control adjusting module, the power supply state of the electric equipment is controlled, when the mode switching circuit connects and conducts the constant current source circuit, the power supply cable and the electric equipment to form a detection loop, the path resistance of the power supply cable is obtained, the problem that the receiving voltages of the electric equipment are different due to the difference of the material lengths of the power supply cables is solved, and the path resistance measurement of the power supply wiring under different scenes is met. Meanwhile, when the mode switching circuit connects and conducts the power supply circuit, the power supply cable and the electric equipment to form a power supply loop, the working voltage of the electric equipment is measured, and the power supply voltage is regulated according to the working voltage so as to regulate the working voltage to a preset voltage interval, thereby solving the problem of abnormal working of the electric equipment caused by the difference of the material length of the power supply cable due to the fixed output voltage of the existing power supply.
Drawings
FIG. 1 is a block diagram of an adaptive power supply in one embodiment;
FIG. 2 is a block diagram of an adaptive power supply in one embodiment;
FIG. 3 is a block diagram of a master control module in one embodiment;
FIG. 4 is a block diagram of a mode switching circuit in one embodiment;
fig. 5 is a block diagram of an adaptive power supply system in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "a," "an," "the," and similar referents in the context of the application are not to be construed as limiting the quantity, but rather as singular or plural. The terms "comprising," "including," "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, article, or apparatus that comprises a list of steps or modules (elements) is not limited to only those steps or elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. The terms "connected," "coupled," and the like in connection with the present application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The term "plurality" as used herein means two or more. "and/or" describes an association relationship of an association object, meaning that there may be three relationships, e.g., "a and/or B" may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship. The terms "first," "second," "third," and the like, as used herein, are merely distinguishing between similar objects and not representing a particular ordering of objects.
In one embodiment, as shown in fig. 1, an adaptive power supply apparatus is provided, which includes a mode switching circuit 10, a constant current source circuit 20, a power supply circuit 30, and a main control adjustment module 40.
The mode switching circuit 10 is connected with the electric equipment through a power supply cable and is used for switching the power supply state of the electric equipment. The power supply state of the electric equipment comprises a detection state and a power supply state.
And a constant current source circuit 20 connected to the mode switching circuit 10 for outputting a detection current.
And a power supply circuit 30 connected to the mode switching circuit 10 for outputting a power supply voltage.
The main control adjusting module 40 is connected with the power supply circuit 30 and the mode switching circuit 10, and is used for controlling the mode switching circuit 10 to connect and conduct the constant current source circuit 20, the power supply cable and the electric equipment to form a detection loop, and measuring the path resistance of the power supply cable based on the acquired detection voltage and the acquired detection current on the detection loop; and controlling the mode switching circuit 10 to connect and conduct the power supply circuit 30, the power supply cable and the electric equipment to form a power supply loop, measuring the working voltage of the electric equipment based on the acquired power supply voltage, power supply current and path resistance of the power supply cable on the power supply loop, and adjusting the power supply voltage according to the working voltage so as to adjust the working voltage to a preset voltage interval.
In the self-adaptive power supply device, the main control adjusting module is used for controlling the connection conduction state between the mode switching circuit and the constant current source circuit as well as between the mode switching circuit and the power supply circuit, and controlling the power supply state of the electric equipment, when the mode switching circuit 10 is used for connecting and conducting the constant current source circuit 20 and the power supply cable with the electric equipment to form a detection loop, the path resistance of the power supply cable is obtained, the problem that the receiving voltages of the electric equipment are different due to the difference of the material lengths of the power supply cables is solved, and the measurement of the path resistance of the power supply wiring under different scenes is satisfied. Meanwhile, when the mode switching circuit 10 connects and conducts the power supply circuit 30, the power supply cable and the electric equipment to form a power supply loop, the working voltage of the electric equipment is measured, and the power supply voltage is adjusted according to the working voltage so as to adjust the working voltage to a preset voltage interval, thereby solving the problem of abnormal working of the electric equipment caused by the difference of the material length of the power supply line due to the fixed output voltage of the existing power supply.
In one embodiment, as shown in fig. 2, the adaptive power supply device further includes a first sampling circuit 50 and a second sampling circuit 60.
The first sampling circuit 50 is connected to a connection path between the mode switching circuit 10 and the power supply circuit 30, and is configured to collect the power supply voltage and the power supply current.
And a second sampling circuit 60 connected to a connection path between the mode switching circuit 10 and the constant current source circuit 20, for collecting a detection voltage between the mode switching circuit 10 and the constant current source circuit 20.
Specifically, since the voltage of the operation of the main control adjustment module 40 is 3.3V, and the voltage on the loop may be greater than 3.3V during the operation of the adaptive power supply device, and the voltage cannot be directly input into the main control adjustment module, the power supply voltage or the detection voltage collected by the main control adjustment module is obtained after the step-down sampling process by the first sampling circuit or the second sampling circuit.
In this embodiment, by setting the sampling circuit, the detected voltage or the power supply voltage in the original detection loop or the power supply loop is reduced in voltage and sampled, so that a large error in the self-adaptive adjustment process caused by directly using the loop voltage by the main control adjustment module is avoided.
In one embodiment, as shown in fig. 3, the master control adjustment module 40 includes an adjustment controller 401 and a dynamic adjustment circuit 402.
The adjustment controller 401 is connected to the first sampling circuit 50 and the second sampling circuit 60, and is configured to detect the voltage on the detection circuit, measure the path resistance of the power supply cable, obtain the power supply voltage and the power supply current on the power supply circuit, and measure the working voltage of the electric device.
And the dynamic adjusting circuit 402 is connected with the power supply circuit 30 and the adjusting controller 401 and is used for dynamically adjusting the power supply voltage until the working voltage is in a preset voltage interval.
Specifically, the dynamic adjustment circuit 402 includes a resistor R1 and a capacitor C1 connected in series between the adjustment controller 401 and the common ground, and an intermediate node of the resistor R1 and the capacitor C1 is connected to the power supply circuit 30.
Further, as shown in fig. 3, the power supply circuit includes a DC-DC chip, a resistor R2, and a resistor R3, where the resistor R2 and the resistor R3 are connected in series and then connected between the mode switching circuit 10 and the DC-DC chip. The feedback pin FB on the DC-DC chip is commonly acted by two voltages, one is the supply voltage of the DC-DC chip output voltage Vout after the step-down, and the other is the self-adaptively adjusted voltage generated by the adjustment controller 401 and the dynamic adjustment circuit 402 in the main control adjustment module 40.
More specifically, in one embodiment, the adjustment controller 401 is further configured to: when the working voltage is smaller than a preset voltage interval, the duty ratio of square waves in the output PWM pulse signal is controlled to be increased, and the power supply voltage is raised; when the working voltage is larger than a preset voltage interval, the duty ratio of square waves in the PWM pulse signal which is controlled to be output is reduced, and the power supply voltage is reduced.
Specifically, in the power supply loop, if the adjustment controller 401 measures that the working voltage of the electric device is smaller than the preset voltage interval, the duty ratio of the square wave in the PWM pulse signal outputted by the control is increased, and the PWM pulse signal passes through the dynamic adjustment circuit 402 and then raises the power supply voltage outputted by the power supply circuit 30. If the operating voltage of the electric device measured by the adjustment controller 401 is within the preset voltage interval, the power supply circuit 30 is not adjusted for the power supply voltage. If the working voltage of the electric equipment measured by the adjustment controller 401 is greater than the preset voltage interval, the duty ratio of the square wave in the PWM pulse signal outputted by the control is reduced, and the PWM pulse signal passes through the dynamic adjustment circuit 402 and then reduces the power supply voltage outputted by the power supply circuit 30.
In the embodiment, the power supply voltage of the power supply circuit is changed by adjusting the duty ratio of the square wave in the PWM pulse signal which is controlled to be output by the controller, so that the self-adaptive adjustment of the power supply voltage is realized.
In one embodiment, as shown in fig. 4, the mode switching circuit 10 includes a first relay K1 and a second relay K2.
The first pin A of the first relay K1 is connected with a power line in the power supply cable, the second pin B is connected with the power supply circuit, and the third pin C is connected with a common ground and is used for connecting the power supply voltage output by the power supply circuit into the power supply loop.
And a fourth pin D of the second relay K2 is connected with a ground wire in the power supply cable, a fifth pin E is connected with the public ground, and a sixth pin F is connected with the constant current source circuit and is used for connecting detection current output by the constant current source circuit into the detection loop.
Specifically, when the detection circuit is configured, the first pin a and the third pin C of the first relay K1 are connected, and the fourth pin D and the sixth pin F of the second relay K2 are connected. When the power supply loop is formed, the first pin A and the second pin B of the first relay K1 are connected, and the fourth pin D and the fifth pin E of the second relay K2 are connected.
It should be noted that, the implementation manner of the mode switching circuit includes, but is not limited to, devices such as MOS transistors, besides the above-mentioned relay.
In the embodiment, the power supply state of the electric equipment can be switched rapidly through the two relays, the device is simple, and the later maintenance is convenient.
Based on the same inventive concept, the embodiment of the application also provides an adaptive power supply system. The system provides a solution to the problem similar to the implementation described in the method above. As shown in fig. 5, the adaptive power supply system includes a powered device and the adaptive power supply apparatus according to the above embodiments. The electric equipment comprises an internal load and a load protection circuit, wherein the load protection circuit is connected between the internal load and the power supply cable and used for controlling detection current to be cut off at two ends of the internal load when the constant current source circuit, the power supply cable and the electric equipment are connected and conducted to form a detection loop.
In more detail, the power supply cable includes a power line and a ground line, the load protection circuit includes a diode D1 and a diode D2, the anode of the diode D1 is connected to the power line, the cathode of the diode D1 is connected to the internal load, the anode of the diode D2 is connected to the ground line, and the cathode of the diode D2 is connected to the anode of the diode D1.
In one embodiment, an adaptive power supply method is provided, which is applied to the adaptive power supply device described in each embodiment, and specifically includes the following steps:
Step 1: the control mode switching circuit connects and conducts the constant current source circuit, the power supply cable and the electric equipment to form a detection loop; and measuring the path resistance of the power supply cable based on the acquired detection voltage and the detection current on the detection loop.
Step 2: the control mode switching circuit connects and conducts the power supply circuit, the power supply cable and the electric equipment to form a power supply loop; and measuring the working voltage of the electric equipment based on the acquired power supply voltage and power supply current on the power supply loop and the path resistance of the power supply cable, and adjusting the power supply voltage according to the working voltage so as to adjust the working voltage to a preset voltage interval.
In one embodiment, in step 2, the adjusting the power supply voltage according to the working voltage to adjust the working voltage to a preset voltage range specifically includes the following steps:
when the working voltage is smaller than a preset voltage interval, the duty ratio of square waves in the PWM pulse signal which is controlled to be output is increased, and the power supply voltage of the power supply circuit is raised. When the working voltage is larger than a preset voltage interval, the duty ratio of square waves in the PWM pulse signal which is controlled to be output is reduced, and the power supply voltage of the power supply circuit is reduced.
An adaptive power supply method is provided, which is applied to an adaptive power supply system as shown in fig. 5, and specifically includes the following steps:
Step 201: the control mode switching circuit connects and conducts the constant current source circuit, the power supply cable and the electric equipment to form a detection loop.
The specific path of the detection loop is as follows: constant current source circuit-mode switching circuit-ground wire-diode D1-power supply wire-mode switching circuit. The diode D2 is not conducted reversely in the electric equipment, so that the internal load is not provided with an electrified loop, and the detection cannot be influenced.
Step 202: based on the collected detection voltage V j and detection current I j on the detection loop, the path resistance R of the power supply cable is measured:
R=(Vj-Vf)/Ij，
Wherein V f is the voltage drop of the diode D1 in forward conduction.
Step 203: the control mode switching circuit connects and conducts the power supply circuit, the power supply cable and the electric equipment to form a power supply loop.
The specific path of the power supply loop is as follows: the power supply circuit-mode switching circuit-power supply line-diode D2-internal load-ground line-mode switching circuit. The diode D1 in the electric equipment is not conducted due to reverse cut-off, so that extra power consumption expense is not caused.
Step 204: based on the collected power supply voltage V g, power supply current I g and the path resistance R of the power supply cable, the working voltage V y=Vg-Ig R of the electric equipment is measured.
Step 205: and adjusting the power supply voltage V g according to the working voltage V y so as to adjust the working voltage to a preset voltage interval. And if the working voltage is smaller than a preset voltage interval, controlling the duty ratio of the square wave in the output PWM pulse signal to be increased, and raising the power supply voltage. And if the working voltage is larger than a preset voltage interval, controlling the duty ratio of the square wave in the output PWM pulse signal to be reduced, and reducing the power supply voltage.
In this embodiment, the resistance on the power line and the ground line is detected through the detection loop, after the measurement is completed, the power supply loop is switched to, the current and the voltage on the power supply loop are measured, the voltage drop on the power line and the ground line is calculated, and the output voltage is dynamically controlled and regulated, so that the voltage of the electric equipment end is within a preset stable range, and the self-adaptive power supply regulation is realized.
It should be understood that these steps are not necessarily performed sequentially in order. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. An adaptive power supply device connected to an electrical consumer via a power supply cable, the device comprising:
the mode switching circuit is connected with the electric equipment through a power supply cable and is used for switching the power supply state of the electric equipment;
the constant current source circuit is connected with the mode switching circuit and used for outputting detection current;
a power supply circuit connected with the mode switching circuit and used for outputting a power supply voltage;
The main control adjusting module is connected with the power supply circuit and the mode switching circuit and used for controlling the mode switching circuit to connect and conduct the constant current source circuit, the power supply cable and the electric equipment to form a detection loop; measuring the path resistance of the power supply cable based on the acquired detection voltage and the detection current on the detection loop; and
The mode switching circuit is controlled to connect and conduct the power supply circuit, the power supply cable and the electric equipment to form a power supply loop; and measuring the working voltage of the electric equipment based on the acquired power supply voltage and power supply current on the power supply loop and the path resistance of the power supply cable, and adjusting the power supply voltage according to the working voltage so as to adjust the working voltage to a preset voltage interval.
2. The adaptive power supply of claim 1, further comprising:
the first sampling circuit is connected to a connecting path between the mode switching circuit and the power supply circuit and is used for collecting the power supply voltage and the power supply current;
and the second sampling circuit is connected to a connecting path of the mode switching circuit and the constant current source circuit and is used for collecting detection voltage between the mode switching circuit and the constant current source circuit.
3. The adaptive power supply of claim 2, wherein the master control adjustment module comprises:
the adjusting controller is connected with the first sampling circuit and the second sampling circuit and is used for detecting voltage on the detection loop, measuring the path resistance of the power supply cable, acquiring the power supply voltage and the power supply current on the power supply loop and measuring the working voltage of the electric equipment;
And the dynamic adjusting circuit is connected with the power supply circuit and the adjusting controller and is used for dynamically adjusting the power supply voltage until the working voltage is in a preset voltage interval.
4. An adaptive power supply according to claim 3, characterized in that the dynamic regulation circuit comprises a resistor R1 and a capacitor C1 connected in series between the regulation controller and a common ground, the intermediate node of the resistor R1 and the capacitor C1 being connected to the power supply circuit.
5. The adaptive power supply of claim 3, wherein the regulation controller is further configured to: when the working voltage is smaller than a preset voltage interval, the duty ratio of square waves in the output PWM pulse signal is controlled to be increased, and the power supply voltage is raised; when the working voltage is larger than a preset voltage interval, the duty ratio of square waves in the PWM pulse signal which is controlled to be output is reduced, and the power supply voltage is reduced.
6. The adaptive power supply of claim 1, wherein the mode switching circuit comprises a first relay and a second relay,
A first pin of the first relay is connected with a power line in the power supply cable, a second pin of the first relay is connected with the power supply circuit, and a third pin of the first relay is connected with a common ground and is used for connecting a power supply voltage output by the power supply circuit into the power supply loop;
And a fourth pin of the second relay is connected with a ground wire in the power supply cable, a fifth pin of the second relay is connected with the public ground, and a sixth pin of the second relay is connected with the constant current source circuit and is used for connecting detection current output by the constant current source circuit into the detection loop.
7. An adaptive power supply system, comprising a powered device and an adaptive power supply apparatus as claimed in any one of claims 1 to 6, wherein the powered device comprises an internal load and a load protection circuit, the load protection circuit being connected between the internal load and the power supply cable and being configured to control a detection current to be cut off at both ends of the internal load when a constant current source circuit, the power supply cable and the powered device are connected to form a detection loop.
8. The adaptive power supply system according to claim 7, wherein the power supply cable includes a power supply line and a ground line, the load protection circuit includes a diode D1 and a diode D2, an anode of the diode D1 is connected to the power supply line, a cathode of the diode D1 is connected to the internal load, an anode of the diode D2 is connected to the ground line, and a cathode of the diode D2 is connected to an anode of the diode D1.
9. An adaptive power supply method applied to an adaptive power supply device according to any one of claims 1 to 6, characterized in that the method comprises:
The control mode switching circuit connects and conducts the constant current source circuit, the power supply cable and the electric equipment to form a detection loop; measuring the path resistance of the power supply cable based on the acquired detection voltage and the detection current on the detection loop;
The control mode switching circuit connects and conducts the power supply circuit, the power supply cable and the electric equipment to form a power supply loop; and measuring the working voltage of the electric equipment based on the acquired power supply voltage and power supply current on the power supply loop and the path resistance of the power supply cable, and adjusting the power supply voltage according to the working voltage so as to adjust the working voltage to a preset voltage interval.
10. The adaptive power supply method of claim 9, wherein the adjusting the power supply voltage according to the operating voltage to adjust the operating voltage to a preset voltage interval comprises:
When the working voltage is smaller than a preset voltage interval, the duty ratio of square waves in the output PWM pulse signal is controlled to be increased, and the power supply voltage of the power supply circuit is raised;
When the working voltage is larger than a preset voltage interval, the duty ratio of square waves in the PWM pulse signal which is controlled to be output is reduced, and the power supply voltage of the power supply circuit is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410373600.6A CN117977531B (en) | 2024-03-29 | Self-adaptive power supply device, system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410373600.6A CN117977531B (en) | 2024-03-29 | Self-adaptive power supply device, system and method |
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| Publication Number | Publication Date |
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| CN117977531A true CN117977531A (en) | 2024-05-03 |
| CN117977531B CN117977531B (en) | 2024-07-02 |
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