CN115348119B - Redundant Ethernet power supply equipment and redundant method thereof - Google Patents
Redundant Ethernet power supply equipment and redundant method thereof Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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Abstract
The invention provides a standby type Ethernet power supply device which is used for supplying power to electronic equipment. The conversion circuit receives the Ethernet power supply and converts the Ethernet power supply into an Ethernet output source. The current regulator is coupled to the conversion circuit and is used for regulating the current proportion of the Ethernet output source to provide a current controlled power supply. The Ethernet power supply device controls the total current added by the output current output by each Ethernet module to meet the demand current of the electronic device. When one of the Ethernet modules is abnormal, the Ethernet power supply equipment controls the total current provided by the other at least one Ethernet power supply equipment to meet the required current.
Description
Technical Field
The present invention relates to a power over ethernet device and a method for operating the same, and more particularly, to a power over ethernet device and a method for redundancy thereof.
Background
As networking is increasingly required in the technical field of electronic devices nowadays, more electronic devices need to be collocated with ethernet devices, and thus can perform networking operation. Among them, because the network cable has a function of transmitting power in addition to network data, more and more electronic devices are powered by the power over ethernet (PoE; power Over Ethernet) device. The existing Ethernet Cat.5 wiring infrastructure is not modified, and the technology of direct current power supply can be provided for some IP-based terminals (such as IP telephone sets, wireless area network Access Points (APs), network cameras and the like) while data are transmitted.
However, in the prior art, using a single ethernet power sourcing equipment has a power limitation, which generally limits the power consumption of the electronic equipment by 15W, 30W, 60W or 90W (depending on the specification of the ethernet power sourcing equipment), so that the power limitation cannot be applied to electronic equipment consuming larger power, or electronic equipment requiring large power instantaneously. Furthermore, since a single ethernet power sourcing equipment is used in the prior art, the biggest disadvantage is that when the ethernet power sourcing equipment fails, the entire electronic equipment fails due to a power outage because it does not have a redundancy function.
Disclosure of Invention
In order to solve the above-mentioned problems, the present invention provides a backup ethernet power sourcing equipment to overcome the problems of the prior art. The power over ethernet device is configured to power electronic devices, the power over ethernet device includes a plurality of ethernet modules, and each ethernet module includes a switching circuit and a current regulator. The conversion circuit receives the Ethernet power supply and converts the Ethernet power supply into an Ethernet output source. The current regulator is coupled to the conversion circuit and is used for regulating the current proportion of the Ethernet output source to provide a current controlled power supply. The Ethernet power supply device controls the total current added by the output current output by each Ethernet module to meet the demand current of the electronic device, and when one of the Ethernet modules is abnormal, the Ethernet power supply device controls the total current provided by the other at least one Ethernet module to meet the demand current.
In an embodiment, each ethernet module further includes a rectifying circuit, and the rectifying circuit is coupled to the converting circuit. The input voltage of the Ethernet power supply is a direct current voltage, and the rectifying circuit is used for rectifying the negative input voltage into the positive input voltage when the input voltage is negative.
In one embodiment, the power over ethernet device further comprises a monitoring circuit and a controller. The monitoring circuit is coupled to the output end of the current regulator of each Ethernet module, and provides a monitoring signal according to the current controlled power supply. The controller receives the monitoring signal and generates a normal working state of the Ethernet module or an alarm state of the Ethernet module when the Ethernet module is abnormal according to the monitoring signal. The current regulator of each Ethernet module is coupled with the controller, and the controller provides regulating signals to the current regulator of each Ethernet module according to the required current.
In one embodiment, the current regulators of each ethernet module are coupled to each other and communicate with each other. When the required current exceeds the rated current of the Ethernet power supply equipment, the current regulator of each Ethernet module adjusts the output current according to the current proportion adjustment.
In an embodiment, the current regulator of each ethernet module equalizes the output current, or the current regulator of each ethernet module adjusts the output current according to the weight ratio; the weight ratio is at least one of total operation time, total output current and current temperature.
In order to solve the above problems, the present invention provides a backup method for power over ethernet devices to overcome the problems of the prior art. The method for providing the Ethernet power supply equipment comprising a plurality of Ethernet modules for supplying power to the electronic equipment comprises the following steps: (a) Each ethernet module receives ethernet power and converts the ethernet power to an ethernet output source. (b) And current proportion adjustment is carried out on the Ethernet output sources to provide a current controlled power supply, so that the total current added by the output currents of each Ethernet module meets the current demand of the electronic equipment. (c) When one of the Ethernet modules is abnormal, the total current provided by at least one of the rest Ethernet modules is controlled to meet the required current.
In one embodiment, the input voltage of the ethernet power supply is a dc voltage, and the backup method further includes the following steps: (d) When the input voltage is negative, the negative input voltage is rectified to a positive input voltage.
In one embodiment, the method further comprises the following steps: (e) The monitoring signal is provided according to the current controlled power supply of each Ethernet module. (f) Generating a normal working state of the Ethernet module or an alarm state of the Ethernet module when the Ethernet module is abnormal according to the monitoring signal. And (g) providing an adjustment signal to each Ethernet module according to the required current.
In one embodiment, the method further comprises the following steps: (h) Each Ethernet module communicates with each other according to the current demand. And (i) adjusting the output current according to the current proportion adjustment when the required current exceeds the rated current of the power over ethernet device.
In one embodiment, the method further comprises the following steps: (j) Each Ethernet module equalizes the output current. Or (k) each ethernet module adjusts the output current of the current-controlled power supply according to the weight ratio.
The main purpose and effect of the invention is that the Ethernet power supply device utilizes the standby mode of N+1, so that when one of the Ethernet modules is abnormal, the Ethernet power supply device can still control the total current provided by the rest Ethernet modules to meet the current required by the electronic device. Therefore, the effect that the electronic equipment can still be stably and normally operated when one of the Ethernet modules is abnormal can be achieved.
Drawings
FIG. 1 is a block diagram of a first embodiment of a redundant Ethernet power supply device of the invention;
FIG. 2 is a block diagram of a second embodiment of a redundant Ethernet power supply device of the invention; and
Fig. 3 is a flow chart of a backup method of the power over ethernet device of the present invention.
In the figure:
100. 100' … power over ethernet device; 1-1 to 1-n … Ethernet module; 10-1 to 10-n … conversion circuits; 12-1 to 12-n … current regulator; 14-1 to 14-n … rectifier circuits; 2 … monitoring circuitry; 22-1 to 22-n … detection circuits; 3 … controller; 4 … indicates a device; 5 … power converter; a … network interface; a C … output; d … power input; a B … network line terminal; 200 … electronic device; pin-1 to Pin-n … Ethernet power supply; po-1-Po-n … Ethernet output sources; pc-1 to Pc-n … current controlled power supply; pout … output power; pe … external power supply; io … outputs a current; it … total current; sm 1-Smn … monitoring signals; sc … modulating signal; S100-S140 ….
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific examples, which are not intended to limit the invention, so that those skilled in the art may better understand the invention and practice it.
Fig. 1 is a block diagram of a first embodiment of a redundant ethernet power sourcing equipment of the present invention. The standby power over ethernet device 100 interfaces with the network line terminal B through the network interface a to receive the ethernet power Pin-1 to Pin-n provided by the network line terminal B. The input voltage of the Ethernet power supply Pin-1 to Pin-n is 25.5W direct current voltage conforming to IEEE802.3at standard of the Ethernet power supply protocol. The output terminal C of the Ethernet power supply device 100 is coupled to the electronic device 200, and converts the Ethernet power sources Pin-1 to Pin-n to supply power to the electronic device 200. The power over ethernet device 100 includes a plurality of ethernet modules 1-n (3 are shown, but more than 2 are shown), and each ethernet module 1-n includes a conversion circuit 10-1-10-n and a current regulator 12-1-12-n. The conversion circuit 10-1-10-n is coupled to the network interface A, and receives the Ethernet power supply Pin-1-Pin-n through the network interface A to convert the Ethernet power supply Pin-1-Pin-n into the Ethernet output source Po-1-Po-n. The current regulators 12-1-12-n are coupled to the converting circuits 10-1-10-n and the output terminal C, and control the converting circuits 10-1-10-n to perform current proportional adjustment on the Ethernet output sources Po-1-Po-n to provide current controlled power sources Pc-1-Pc-n (the sum of which is the output power source Pout supplied to the electronic device 200). Each ethernet module 1-n has an independent network interface a, and is respectively and independently coupled to a network line terminal B, so that ethernet power sources Pin-1-Pin-n received by the conversion circuits 10-1-10-n are different power sources. The "power supply" may be a generic term for voltage, current, and power unless otherwise specified. For example, but not limited to, the current controlled power sources Pc-1-Pc-n refer to the output voltages, output currents Io, and output powers outputted by the current regulators 12-1-12-n, and so on.
It should be noted that in an embodiment of the present invention, the converting circuits 10-1 to 10-n may be switching power converters (such as but not limited to flyback converters), and the output voltage may be a fixed predetermined voltage or a predetermined voltage having a plurality of sets of different voltage levels. Specifically, the conversion circuits 10-1 to 10-n may be converters with or without a Power Delivery (PD) function. The converter without the power delivery function typically outputs a fixed predetermined voltage and does not need to communicate with the electronic device 200 in a handshake. The internal controller of the converter with the power supply transmission function is a power supply transmission controller with a power supply transmission protocol, and after the power supply transmission controller can perform handshake communication with the electronic device 200, the voltage level required by the electronic device 200 is known, so as to adjust the voltage level of the predetermined voltage according to the requirement of the electronic device 200, thereby meeting the requirement of the electronic device 200.
The output current Io provided by each ethernet module 1-n is added to the total current It, the ethernet power sourcing equipment 100 performs current proportional adjustment on each ethernet output source Po-1-Po-n according to the required current required by the electronic device 200, the total current It provided by the Ethernet modules 1-n meets the required current of the electronic device 200, so as to achieve the effect of prolonging the service life of the Ethernet modules 1-n by sharing the current. In FIG. 1, each of the current regulators 12-1-12-n is coupled to communicate with each other so that the Ethernet modules 1-n know the ratio of their own required loads. Specifically, after the standby ethernet power sourcing equipment 100 knows the required current required by the electronic device 200 (which may be known by handshake communication or by output feedback, etc.), the current regulators 12-1 to 12-n communicate with each other to make each ethernet module 1-1 to 1-n know the self-required load ratio, and then calculate to obtain the adjustment value (i.e. the difference between the current value of the output current Io and the target current value) for current ratio adjustment, so as to control the conversion circuit 10-1 to 10-n according to the adjustment value.
In one embodiment of the present invention, at least two operation modes using current ratio adjustment may be included. One of the operation modes is a current sharing operation, and the current regulator 12-1-12-n of each Ethernet module 1-n performs current sharing on the output current Io so as to average the output current Io of each Ethernet module 1-n. Another operation mode is weight ratio operation, which sets the order of the Ethernet modules 1-1 to 1-n according to a condition, and sets the current sharing proportion of each Ethernet module 1-1 to 1-n according to the order. Specifically, the current regulators 12-1-12-n of each Ethernet module 1-n regulate the output current Io according to the weight ratio. The weight is relatively heavy, and the output current Io to be provided is relatively high, and otherwise relatively low. The weight ratio may be, for example, but not limited to, at least one of the total operation time of each Ethernet module 1-n, the total output current and the current temperature of each Ethernet module 1-n. Taking the total operation time of each Ethernet module 1-n as a weight ratio as an example, if the total operation time of the Ethernet modules 1-n is 1-1, 1-2 and 1-n in sequence from long to short, the weight of the Ethernet module 1-n is heavier when the weight ratio operation is performed, and higher output current Io needs to be provided, and so on. Thus, the effect of prolonging the service life of the Ethernet modules 1-1 to 1-n can be achieved.
Further, the power over ethernet device 100 is designed as a backup device of n+1. Assuming that the ethernet modules 1-2-1-N are "N" devices, the total current It that can be provided is the current when the ethernet modules 1-2-1-N are all fully loaded (which can be regarded as the rated current of the ethernet power sourcing equipment 100, and the rated current can just meet the required current required by the electronic device), and the ethernet module 1-1 is the n+1th standby device. When one of the ethernet modules 1-1 to 1-n (assumed to be the ethernet module 1-2) is abnormal, the ethernet power sourcing equipment 100 can still control the total current It provided by the rest of the ethernet modules 1-1, 1-3 to 1-n to meet the required current of the electronic device 200. Therefore, when one of the Ethernet modules 1-1 to 1-n is abnormal, the electronic device 200 can still operate stably and normally. Moreover, by using the n+1 backup device, the ethernet modules 1-1 to 1-N can be further designed as modules, so that the ethernet power sourcing equipment 100 can achieve the effect of easy replacement and maintenance. It should be noted that in one embodiment of the present invention, the ethernet power sourcing equipment 100 may include a general controller (not shown) for detecting and controlling each ethernet module 1-1 to 1-n, or the internal controllers (not shown, such as but not limited to the controllers within the conversion circuits 10-1-10-n) in each ethernet module 1-n are coupled to each other, so as to obtain the current operation status of each ethernet module 1-n.
In addition, since the power over ethernet device 100 is designed as a backup device of n+1, it may have an excess power supply function. Specifically, when the required current of the electronic device is greater than the rated current of the ethernet power sourcing equipment 100, since the ethernet power sourcing equipment 100 has the standby function of n+1, the power supplying margin is still available, and the power supplying can be performed excessively. Under the condition of excess power supply, the current regulators 12-1-12-n of each Ethernet module 1-n regulate the output current Io according to the current proportion, so that the total current It supplied exceeds the rated current and still meets the required current required by the electronic equipment 200. For example, but not limited to, two sets of 60W Ethernet modules 1-n in parallel may provide up to 120W of output in the event that the electronic device 200 has excess power requirements. It should be noted that, in an embodiment of the present invention, the ethernet modules of the n+1 group may be used when one of the ethernet modules 1-1 to 1-N is abnormal and needs to be powered by a standby source (i.e. the ethernet modules are in a standby state and do not operate when the ethernet modules do not need to be powered by a standby source), or may be incorporated into a device to supply power together when the ethernet modules do not need to be powered by a standby source, which may be customized according to actual requirements.
Referring back to fig. 1, the ethernet power sourcing equipment 100 further comprises a monitoring circuit 2, a controller 3 and a pointing device 4. The monitoring circuit 2 includes a plurality of detecting circuits 22-1 to 22-n, and the detecting circuits 22-1 to 22-n are respectively coupled to the output ends of the current regulators 12-1 to 12-n, so as to provide monitoring signals Sm1 to Smn according to the current controlled power sources Pc-1 to Pc-n. The controller 3 is coupled to the monitor circuit 2 and receives the monitor signals Sm 1-Smn to determine whether the Ethernet modules 1-n are normal according to the monitor signals Sm 1-Smn. The detection circuits 22-1 to 22-n can provide monitoring signals Sm1 to Smn representing the current controlled power sources Pc-1 to Pc-n (i.e. output power, output voltage or output current Io) and the like, and the controller 3 can determine whether the output sources of the current controlled power sources Pc-1 to Pc-n (i.e. output power, output voltage or output current Io) and the like are normal or not through the monitoring signals Sm1 to Smn. The indication device 4 is coupled to the controller 3 and is activated according to an indication of the controller 3. The indication device 4 may be, for example, but not limited to, a buzzer, an LED lamp, a display device of a man-machine interface, etc.
When the controller 3 determines that the ethernet modules 1-1 to 1-n are normal according to the monitoring signals Sm1 to Smn, the controller 3 generates a device normal indication to the indicating device 4 to indicate that the ethernet modules 1-1 to 1-n are in a normal operation state. Otherwise, the controller 3 generates a device abnormality indication to the indication device 4 to indicate that one (or more) of the ethernet modules 1-1 to 1-n is/are in an abnormal alarm state. Wherein, the controller 3 can clearly indicate which Ethernet module 1-1 is abnormal through the indication device 4. The abnormality may be, for example, but not limited to, an incorrect current controlled power source Pc-1 to Pc-n, or no output.
Fig. 2 is a circuit block diagram of a second embodiment of the standby ethernet power sourcing equipment of the present invention, and fig. 1 is also referred to. The difference between the power over ethernet device 100' of the embodiment of fig. 2 and the power over ethernet device 100 of fig. 1 is that each of the ethernet modules 1-n further includes a rectifying circuit 14-1-14-n, respectively. The rectifying circuits 14-1-14-n are coupled to the converting circuits 10-1-10-n and receive the Ethernet power supply Pin-1-Pin-n provided by the network line terminal B. Further, since the input voltage of the ethernet power supply Pin-1 to Pin-n is a dc voltage of 25.5 watts according to the ieee802.3at specification, the dc voltage provided by the network interface a may be a positive dc voltage (e.g., without limitation +57V) or a negative dc voltage (e.g., without limitation-57V). The rectifying circuit is used for rectifying the negative input voltage into the positive input voltage when the input voltage is negative, so as to avoid the situation that the converting circuit 10-1 to 10-n cannot operate due to the fact that the negative direct current voltage is directly supplied to the converting circuit 10-1 to 10-n.
Another difference between the embodiment of the present invention and the embodiment of fig. 1 is that the current regulator 12-1-12-n of each ethernet module 1-n is coupled to the controller 3, and the controller 3 detects the required current (which may be obtained by a handshake communication or by an output feedback, etc.) required by the electronic device 200. The controller 3 provides an adjusting signal Sc to the current adjusters 12-1-12-n of each Ethernet module 1-n according to the required current, so that each Ethernet module 1-n obtains an adjusting value (i.e. a difference between a current value of the output current Io and a target current value) to be adjusted in current proportion according to the adjusting signal Sc, and controls the conversion circuits 10-1-10-n according to the adjusting value.
Another difference between the embodiment of the present invention and the embodiment of fig. 1 is that the power over ethernet device 100' further includes a power converter 5, and the power converter 5 is coupled between the power input D and the power output C. The power converter 5 receives an external power source Pe (such as, but not limited to, mains) through a power input D to convert the external power source Pe into an output power source Pout to power the electronic device 200. Specifically, when the network interface a does not have the ethernet power Pin-1 to Pin-n input, the power converter 5 can be used to convert the power required for the operation of the electronic device 200, so that the electronic device 200 can still operate normally. It should be noted that in an embodiment of the present invention, the differences between fig. 1 and fig. 2 may be applied to each other according to the actual design requirement of the ethernet power sourcing equipment 100, and will not be described herein.
Please refer to fig. 3, which is a flowchart illustrating a backup method of the ethernet power sourcing equipment of the present invention, in combination with fig. 1-2. The standby method of the power over ethernet device 100 mainly provides the power over ethernet device 100 including a plurality of ethernet modules 1-1 to 1-n for powering the electronic device 200. The backup method includes that each Ethernet module receives Ethernet power and converts the Ethernet power into an Ethernet output source (S100). In a preferred embodiment, each Ethernet module 1-n includes a switching circuit 10-1-10-n and a current regulator 12-1-12-n. The conversion circuit 10-1-10-n is coupled to the network interface A, and receives the Ethernet power supply Pin-1-Pin-n through the network interface A to convert the Ethernet power supply Pin-1-Pin-n into the Ethernet output source Po-1-Po-n.
Then, the current proportion of the ethernet output source is adjusted to provide a current controlled power source, so that the total current added by the output currents of each ethernet module meets the requirement current of the electronic device (S120). In a preferred embodiment, the current regulators 12-1-12-n are used to regulate the current ratio of the Ethernet output sources Po-1-Po-n to provide current controlled power sources Pc-1-Pc-n (the sum of which is the output power source Pout supplied to the electronic device 200). Each of the current-controlled power supplies Pc-1 to Pc-n may include an output current Io, which is summed to a total current It. The ethernet power sourcing equipment 100 performs current proportion adjustment on each ethernet output source Po-1 to Po-n according to the required current required by the electronic device 200, so that the total current It provided by the ethernet module 1-1 to 1-n meets the required current required by the electronic device 200.
Finally, when one of the Ethernet modules is abnormal, controlling the total current provided by the other at least one to meet the required current (S140). In a preferred embodiment, power over ethernet device 100 is designed as an n+1 backup device. When one of the ethernet modules 1-1 to 1-n (assumed to be ethernet module 1-2) is abnormal, the total current It provided by the remaining ethernet modules 1-1, 1-3 to 1-n can still satisfy the required current of the electronic device 200. Therefore, when one of the Ethernet modules 1-1 to 1-n is abnormal, the electronic device 200 can still operate stably and normally.
The above-described embodiments are merely preferred embodiments for fully explaining the present invention, and the scope of the present invention is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present invention, and are intended to be within the scope of the present invention. The protection scope of the invention is subject to the claims.
Claims (12)
1. A power over ethernet device capable of powering an electronic device, the power over ethernet device comprising:
the ethernet module of several, every ethernet module includes:
a conversion circuit for receiving an Ethernet power supply and converting the Ethernet power supply into an Ethernet output source; and
A current regulator coupled to the conversion circuit and configured to provide a current controlled power supply by performing a current ratio adjustment on the ethernet output source;
wherein, a total current added by an output current output by each Ethernet module meets a demand current of the electronic equipment, and when one of the Ethernet modules is abnormal, the Ethernet power supply equipment controls the total current provided by at least one other Ethernet module to meet the demand current;
wherein the current regulators of each ethernet module are coupled to each other and communicate with each other; the power over ethernet device is n+1 backup device, and the n+1 ethernet module is a backup device, when the required current exceeds a rated current of the power over ethernet device, the backup device is incorporated into the power over ethernet device to supply power together, so that the current regulator of each ethernet module adjusts the output current according to the current proportion, and the total current exceeds the rated current and still meets the required current;
wherein the rated current is the current when each Ethernet module is fully loaded.
2. The power over ethernet device of claim 1, wherein each ethernet module further comprises:
a rectifying circuit coupled to the converting circuit;
the rectification circuit is used for rectifying the negative input voltage into the positive input voltage when the input voltage is negative.
3. The power over ethernet device of claim 1, further comprising:
the monitoring circuit is coupled with the output end of the current regulator of each Ethernet module and provides a monitoring signal according to the current controlled power supply;
the controller receives the monitoring signals and generates a working normal state when the Ethernet modules are normal or a warning state when the Ethernet modules are abnormal according to the monitoring signals;
the current regulator of each Ethernet module is coupled with the controller, and the controller provides a regulating signal to the current regulator of each Ethernet module according to the required current.
4. A power over ethernet device capable of powering an electronic device, the power over ethernet device comprising:
the ethernet module of several, every ethernet module includes:
a conversion circuit for receiving an Ethernet power supply and converting the Ethernet power supply into an Ethernet output source; and
A current regulator coupled to the conversion circuit and configured to provide a current controlled power supply by performing a current ratio adjustment on the ethernet output source;
wherein, a total current added by an output current output by each Ethernet module meets a demand current of the electronic equipment, and when one of the Ethernet modules is abnormal, the Ethernet power supply equipment controls the total current provided by at least one other Ethernet module to meet the demand current;
wherein the current regulator of each Ethernet module adjusts the output current according to a weight ratio; the weight ratio is determined based on at least one of a total operating time, an output current total, and a present temperature.
5. The power over ethernet device of claim 4, wherein each ethernet module further comprises:
a rectifying circuit coupled to the converting circuit;
the rectification circuit is used for rectifying the negative input voltage into the positive input voltage when the input voltage is negative.
6. The power over ethernet device of claim 4, further comprising:
the monitoring circuit is coupled with the output end of the current regulator of each Ethernet module and provides a monitoring signal according to the current controlled power supply;
the controller receives the monitoring signals and generates a working normal state when the Ethernet modules are normal or a warning state when the Ethernet modules are abnormal according to the monitoring signals;
the current regulator of each Ethernet module is coupled with the controller, and the controller provides a regulating signal to the current regulator of each Ethernet module according to the required current.
7. A backup method of Ethernet power supply equipment is to provide an Ethernet power supply equipment comprising a plurality of Ethernet modules to supply power to an electronic device, wherein the Ethernet power supply equipment is N+1 backup equipment, and the N+1 Ethernet module is a backup equipment, and the backup method is characterized by comprising the following steps:
each Ethernet module receives an Ethernet power supply and converts the Ethernet power supply into an Ethernet output source;
the Ethernet output source is subjected to current proportion adjustment to provide a current controlled power supply, so that a total current added by an output current of each Ethernet module meets a required current of the electronic equipment;
when one of the Ethernet modules is abnormal, controlling the total current provided by at least one of the rest Ethernet modules to meet the required current;
each Ethernet module communicates with each other according to the required current; and
When the required current exceeds a rated current of the power over ethernet device, the backup device is incorporated into the power over ethernet device to supply power together, so that each power over ethernet module adjusts the output current according to the current proportion, and the total current exceeds the rated current and still meets the required current;
wherein the rated current is the current when each Ethernet module is fully loaded.
8. The backup method of claim 7 wherein an input voltage of the ethernet power source is a dc voltage, the backup method further comprising the steps of:
when the input voltage is negative, rectifying the negative input voltage to the positive input voltage.
9. The backup method of claim 7, further comprising the steps of:
providing a monitoring signal according to the current controlled power supply of each Ethernet module;
generating a working normal state when each Ethernet module is normal or a warning state when each Ethernet module is abnormal according to the monitoring signals; and
Providing a regulating signal to each Ethernet module according to the required current.
10. A backup method for a power over ethernet device, which provides a power over ethernet device including a plurality of ethernet modules to power an electronic device, the backup method comprising the steps of:
each Ethernet module receives an Ethernet power supply and converts the Ethernet power supply into an Ethernet output source;
the Ethernet output source is subjected to current proportion adjustment to provide a current controlled power supply, so that a total current added by an output current of each Ethernet module meets a required current of the electronic equipment; and
When one of the Ethernet modules is abnormal, controlling the total current provided by at least one of the rest Ethernet modules to meet the required current; and
Each Ethernet module adjusts an output current of the current controlled power supply according to a weight ratio;
wherein the weight ratio is determined based on at least one of a total operating time, an output current total, and a present temperature.
11. The backup method of claim 10 wherein an input voltage of the ethernet power source is a dc voltage, the backup method further comprising the steps of:
when the input voltage is negative, rectifying the negative input voltage to the positive input voltage.
12. The backup method of claim 10, further comprising the steps of:
providing a monitoring signal according to the current controlled power supply of each Ethernet module;
generating a working normal state when each Ethernet module is normal or a warning state when each Ethernet module is abnormal according to the monitoring signals; and
Providing a regulating signal to each Ethernet module according to the required current.
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| TW110117288A TWI750092B (en) | 2021-05-13 | 2021-05-13 | Control circuit for lifting platform and method of control the same |
| TW110117288 | 2021-05-13 |
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| CN202110777092.4A Active CN115348119B (en) | 2021-05-13 | 2021-07-09 | Redundant Ethernet power supply equipment and redundant method thereof |
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| TW202245439A (en) | 2022-11-16 |
| CN115348119A (en) | 2022-11-15 |
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