CN113381501B - Device for automatically identifying insertion of PD equipment - Google Patents
Device for automatically identifying insertion of PD equipment Download PDFInfo
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- CN113381501B CN113381501B CN202110699136.6A CN202110699136A CN113381501B CN 113381501 B CN113381501 B CN 113381501B CN 202110699136 A CN202110699136 A CN 202110699136A CN 113381501 B CN113381501 B CN 113381501B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
- H02J9/007—Detection of the absence of a load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/12—Arrangements for remote connection or disconnection of substations or of equipment thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
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- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention relates to the technical field of switches, in particular to a device for automatically identifying the insertion of PD equipment, which comprises a controller U3, an anode switch selection module, a cathode switch selection module, a PD identification module, a power supply enabling module and a power supply module, wherein the anode switch selection module is connected with the controller U3; the negative switch selection module is connected with the PD identification module, and the PD identification module is connected with the controller U3; the power supply enabling module is connected with the controller U3, the power supply enabling module is connected with the power supply module, and the controller U3 controls whether the power supply module outputs power supply voltage or not through the power supply enabling module; the controller U3 controls the positive voltage output end to be connected with the identification voltage input end or the power supply voltage input end through the positive closed control end. The device for automatically identifying the insertion of the PD equipment can identify the insertion of the PD equipment and achieve the purpose of reducing no-load loss without supplying power in no-load.
Description
Technical Field
The invention relates to the technical field of switches, in particular to a device for automatically identifying insertion of PD equipment.
Background
The six-stage energy efficiency is a new standard of energy consumption in the current power supply field. In the existing power supply device of the PD equipment, after the whole machine is electrified, the power supply, the IC and the power supply device on the POE mainboard are both in a working state, partial power is actually consumed, the no-load power is increased, and if the no-load power is too large, the overall efficiency calculation of the six-stage energy efficiency is reduced.
Disclosure of Invention
The invention provides a device for automatically identifying the insertion of PD equipment aiming at the problems in the prior art, which can identify the insertion of the PD equipment and realize the purpose of reducing no-load loss without supplying power in no-load.
In order to solve the technical problems, the invention adopts the following technical scheme: a device for automatically identifying the insertion of PD equipment comprises a controller U3, a positive switch selection module, a negative switch selection module, a PD identification module, a power supply enabling module and a power supply module; the positive switch selection module is provided with an identification voltage input end, a power supply voltage input end, a positive voltage output end and a positive closed control end; the negative switch selection module is provided with a negative voltage input end, an identification voltage output end and a negative closed control end; when the PD equipment is accessed, the anode of the PD equipment is connected with the anode voltage output end, and the cathode of the PD equipment is connected with the cathode voltage input end; the identification voltage output end of the negative switch selection module is connected with the input end of the PD identification module, and the output end of the PD identification module is connected with the controller U3; the input end of the power supply enabling module is connected with the controller U3, the output end of the power supply enabling module is connected with the power supply module, the controller U3 controls whether the power supply module outputs power supply voltage or not through the power supply enabling module, and the voltage output end of the power supply module is connected with the power supply voltage input end of the positive switch selection module; the controller U3 is connected with the positive closed control end and the negative closed control end, and controls the positive voltage output end to be connected with the identification voltage input end or the power supply voltage input end through the positive closed control end.
Preferably, the positive switch selection module comprises a first relay LS1 and a first closing control unit, a normally open contact of the first relay LS1 is an identification voltage input end, a closed contact of the first relay LS1 is a power supply voltage input end, a switch end of the first relay LS1 is a positive voltage output end, an input end of the first closing control unit is a positive closing control end, and the first closing control unit is used for controlling whether a coil of the first relay LS1 is electrified or not and further controlling whether the first relay LS1 is attracted or not; the negative switch selection module comprises a second relay LS2 and a second closed control unit, a normally open contact of the second relay LS2 is an identification voltage output end, a switch end of the second relay LS2 is a negative voltage input end, an input end of the second closed control unit is a negative closed control end, and the second closed control unit is used for controlling whether a coil of the second relay LS2 is electrified or not and then controlling whether the second relay LS2 is attracted or not.
Preferably, the first closing control unit includes a switch tube Q1, a resistor R50, a resistor R40 and a diode D2, the controller U3 is connected with the control end of the switch tube Q1 through the resistor R50, the switch end of the switch tube Q1 is connected with the coil of the first relay LS1, the two ends of the resistor R40 are connected with the control end of the switch tube Q1 and the ground end respectively, the two ends of the diode D2 are connected with the two ends of the coil of the first relay LS1 respectively, and the anode of the diode D2 is connected with the switch end of the switch tube Q1.
Preferably, the second closing control unit includes a switch tube Q2, a resistor R51, a resistor R41 and a diode D3, the controller U3 is connected with the control end of the switch tube Q2 through the resistor R51, the switch end of the switch tube Q2 is connected with the coil of the second relay LS2, the two ends of the resistor R41 are connected with the control end and the ground end of the switch tube Q2 respectively, the two ends of the diode D3 are connected with the two ends of the coil of the second relay LS2 respectively, and the anode of the diode D3 is connected with the switch end of the switch tube Q2.
Preferably, the PD identification module includes a resistor R45, a comparator U7B, a diode D18, a switch tube Q3, and a voltage dividing unit, the identification voltage output end of the negative switch selection module is connected to the positive input end of the comparator U7B through the resistor R45, the reverse input end of the comparator U7B is connected to the output end of the voltage dividing unit, the output end of the comparator U7B is connected to the anode of the diode D18, the cathode of the diode D18 is connected to the control end of the switch tube Q3, and the switch end of the switch tube Q3 is connected to the controller U3.
Preferably, the PD identification module further includes a resistor R44, a comparator U7A, and a diode D4, the identification voltage output end of the negative switch selection module is connected to the positive input end of the comparator U7A through the resistor R44, the reverse input end of the comparator U7A is connected to the output end of the voltage division unit, the output end of the comparator U7A is connected to the anode of the diode D4, and the cathode of the diode D4 is connected to the control end of the switching tube Q3.
Preferably, the power supply enabling module includes a switch tube Q5, a switch tube Q6, a resistor R55, a resistor R54, a resistor R57 and a resistor 58, the controller U3 is connected with the control end of the switch tube Q5 through the resistor R55, the switch end of the switch tube Q5 is connected with the control end of the switch tube Q6, the resistor R54 is a pull-up resistor of the switch end of the switch tube Q5, the switch end of the switch tube Q5 is connected with the switch end of the switch tube Q6 through the resistor R57, and the switch end of the switch tube Q6 is connected with the power supply module.
Preferably, the device for automatically identifying the insertion of the PD equipment further comprises a prompt lamp module, wherein the prompt lamp module comprises a prompt lamp LED1 and a prompt lamp LED2 which are both connected to the controller U3, the prompt lamp LED1 is used for displaying whether the power supply module is in a working state, and the prompt lamp LED2 is used for displaying the power supply amount of the power supply module.
The invention has the beneficial effects that:
according to the device for automatically identifying the insertion of the PD equipment, the positive voltage output end is connected with the identification voltage input end in the initial state; when the PD equipment is connected, the positive switch selection module, the PD equipment and the negative switch selection module form a loop, at the moment, the identification voltage output end of the negative switch selection module outputs voltage to the PD identification module, after receiving a voltage signal, the PD identification module outputs identification voltage to the controller U3, when the controller U3 detects that the output end of the PD identification module has level change, the controller U3 sends a control signal to the power supply enabling module, the power supply enabling module controls the power supply module to supply power and output voltage to the power supply voltage input end of the positive switch selection module, and the controller U3 sends control signals to the positive closing control end and the negative closing control end, so that the positive voltage output end of the positive switch selection module is connected with the power supply voltage input end, meanwhile, the negative voltage input end of the negative switch selection module is disconnected from the identification voltage output end, and the voltage of the power supply module forms a power supply loop through the PD equipment, and power supply is achieved for the PD equipment. The invention controls whether the power supply module has voltage output or not by identifying whether the PD equipment is inserted or not, namely, the power supply module does not supply power to other devices when no load exists, thereby reducing the power when no PD equipment is inserted.
Drawings
FIG. 1 is a block diagram of the present invention;
FIG. 2 is a schematic diagram of the circuit of the present invention;
fig. 3 is a schematic circuit diagram of the notification lamp module of the present invention.
The reference numerals in fig. 1 to 3 include:
the intelligent power supply comprises a 1-positive switch selection module, a 2-negative switch selection module, a 3-PD identification module, a 4-power supply enabling module, a 5-power supply module, a 6-voltage division unit and a 7-prompting lamp module.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention is described in detail below with reference to the attached drawings.
The device for automatically identifying the insertion of the PD equipment provided in this embodiment, as shown in fig. 1, includes a controller U3, a positive switch selection module 1, a negative switch selection module 2, a PD identification module 3, a power supply enabling module 4, and a power supply module 5; the positive switch selection module 1 is provided with an identification voltage input end, a power supply voltage input end, a positive voltage output end and a positive closed control end; the negative switch selection module 2 is provided with a negative voltage input end, an identification voltage output end and a negative closed control end; when the PD equipment is accessed, the anode of the PD equipment is connected with the anode voltage output end, and the cathode of the PD equipment is connected with the cathode voltage input end; the identification voltage output end of the negative switch selection module 2 is connected with the input end of the PD identification module 3, and the output end of the PD identification module 3 is connected with the controller U3; the input end of the power supply enabling module 4 is connected with the controller U3; the positive electrode closed control end and the negative electrode closed control end are both connected with the controller U3; the output end of the power supply enabling module 4 is connected with the power supply module 5, and the power supply output end of the power supply module 5 is connected with the power supply voltage input end of the anode switch selection module 1. Preferably, the controller U3 may be a single chip microcomputer, an embedded control system, or the like.
Specifically, as shown in fig. 1, in an initial state, the positive voltage output end is connected to the identification voltage input end, and the identification voltage input end is connected to a 5V voltage; the specific working principle is as follows: when no PD device is connected, the positive switch selection module 1 and the negative switch selection module 2 do not form a loop before, and therefore the identification voltage output end of the negative switch selection module 2 does not output voltage, and therefore the output end of the PD identification module 3 does not have level change, and therefore the controller U3 does not output a control signal to the power supply enabling module 4, and the power supply enabling module 4 does not operate, and therefore the power supply module 5 does not output power supply voltage, and then other devices of the device of the present embodiment do not consume power supply, that is, power supply power consumption during idling is reduced. When a PD device is connected, the positive switch selection module 1, the PD device and the negative switch selection module 2 form a loop, the initial state is 5V voltage power supply of the identification voltage input end, at this time, the identification voltage output end of the negative switch selection module 2 outputs voltage to the PD identification module 3, the PD identification module 3 outputs identification voltage to the controller U3 after receiving a voltage signal, when the controller U3 detects that the output end of the PD identification module 3 has level change, the controller U3 sends a control signal to the power enable module 4, the power enable module 4 controls the power supply module 5 to output voltage to the power supply voltage input end of the positive switch selection module 1, and the controller U3 sends a control signal to the positive closed control end and the negative closed control end, so that the positive voltage output end of the positive switch selection module 1 is connected with the power supply voltage input end, and the negative voltage input end of the negative switch selection module 2 is disconnected with the identification voltage output end, so that the voltage of the power supply module 5 forms a power supply loop through the PD device, and the PD device is powered. The invention controls whether the power supply module 5 has voltage output or not by identifying whether the PD equipment is inserted or not, namely, the power supply module does not supply power to other devices when no load exists, thereby reducing the power when no PD equipment is inserted.
As shown in fig. 1 and 2, an anode switch selection module 1 includes a first relay LS1 and a first closing control unit, a normally open contact of the first relay LS1 is an identification voltage input end, a closing contact of the first relay LS1 is a power supply voltage input end, a switch end of the first relay LS1 is an anode voltage output end, an input end of the first closing control unit is an anode closing control end, and the first closing control unit is used for controlling whether a coil of the first relay LS1 is energized to control whether the first relay LS1 is attracted; the negative switch selection module 2 comprises a second relay LS2 and a second closed control unit, a normally open contact of the second relay LS2 is an identification voltage output end, a switch end of the second relay LS2 is a negative voltage input end, an input end of the second closed control unit is a negative closed control end, and the second closed control unit is used for controlling whether a coil of the second relay LS2 is electrified or not and then controlling whether the second relay LS2 is attracted or not.
As shown in fig. 2, the PD identification module 3 of this embodiment includes a resistor R45, a comparator U7B, a diode D18, a switch tube Q3, and a voltage dividing unit 6, wherein an identification voltage output end of the negative switch selection module 2 is connected to a forward input end of the comparator U7B through the resistor R45, a reverse input end of the comparator U7B is connected to an output end of the voltage dividing unit 6, an output end of the comparator U7B is connected to an anode of the diode D18, a cathode of the diode D18 is connected to a control end of the switch tube Q3, and a switch end of the switch tube Q3 is connected to the controller U3. The PD identification module 3 further includes a resistor R44, a comparator U7A, and a diode D4, the identification voltage output terminal of the negative switch selection module 2 is connected to the positive input terminal of the comparator U7A through the resistor R44, the reverse input terminal of the comparator U7A is connected to the output terminal of the voltage division unit 6, the output terminal of the comparator U7A is connected to the anode of the diode D4, and the cathode of the diode D4 is connected to the control terminal of the switching tube Q3. The PD identification module 3 of the present embodiment is provided with corresponding filtering elements, such as a resistor R53, a capacitor C32, etc., and the filtering manner is the prior art, which will not be described in detail herein.
As shown in fig. 2, the power enable module 4 of this embodiment includes a switch tube Q5, a switch tube Q6, a resistor R55, a resistor R54, a resistor R57, and a resistor 58, the controller U3 is connected to the control end of the switch tube Q5 through the resistor R55, the switch end of the switch tube Q5 is connected to the control end of the switch tube Q6, the resistor R54 is a pull-up resistor at the switch end of the switch tube Q5, the switch end of the switch tube Q5 is connected to the switch end of the switch tube Q6 through the resistor R57, and the switch end of the switch tube Q6 is connected to the power supply module 5.
Specifically, as shown in fig. 2, it is a schematic circuit diagram of the present embodiment. In this embodiment, the first relay LS1 and the second relay LS2 are selected to control the voltage selection. When no PD equipment is accessed, the first relay LS1 and the second relay LS2 are both in an off state, PIN2 and PIN3 of the first relay LS1 are switched on, and PIN6 and PIN7 are switched on; PIN2 and PIN3 of the second relay LS2 are connected, and PIN6 and PIN7 are connected; since no PD device is connected, no loop is formed between the first relay LS1 and the second relay LS2, so no voltage signal is input to the PD identification module 3, and thus the level of the output terminal PD _ INT of the PD identification module 3 is not changed, that is, the PIN11 of the controller U3 does not detect the change of the output terminal PD _ INT of the PD identification module 3, so the PIN4 of the controller U3 does not output the control voltage to the power enable module 4, and thus the power enable module 4 does not output the enable control signal to the power supply module 5, and the power supply module 5 does not output a voltage, and the power supply module 5 in the prior art generally outputs a voltage of 55V, so that an IC and other devices connected with the voltage of 55V will not operate, thereby effectively reducing the power loss during idling (without a PD device).
When the PD equipment is accessed, because all standard PD equipment has 25K resistors, after the PD equipment is accessed, 5V voltage passes through a resistor R38, a PIN2 and a PIN3 PIN of a first relay LS1 and is divided into 3V voltage through Vmain _ OUT from a positive pole of a network cable and an internal standard 25K resistor of the PD equipment, the 3V voltage passes through a PIN3 and a PIN2 PIN of a second relay LS2 from a negative pole of the network cable to form a loop, an output voltage signal passes through a PD _ M network to be connected with the resistor R45, a comparator U7B compares the voltage output by the resistor R45 with a reference voltage Vref of a reverse input end, then the output end of the comparator U7B outputs high level to enable a switching tube Q3 to be conducted, the level of a PD _ INT end connected with the controller U3 is changed at the moment, when a PIN11 of the controller U3 detects that the level of the PD _ INT end changes, then a PIN4 of the controller U3 outputs a high level, so that the switching tube Q5 and the switching tube Q6 are turned on, and the Vmain _ RUN end outputs a low level, and the low level is input to the power supply module 5, so that the power supply module 5 outputs 55V, and the PIN5 of the controller U3 simultaneously outputs a high level to the control ends of the switching tube Q2 and the switching tube Q1, so that the switching tube Q1 and the switching tube Q2 are both turned on, and then the first relay LS1 and the second relay LS2 are controlled to be attracted, the PIN3 of the first relay LS1 is turned on with the PIN4, and the PIN5 is turned on with the PIN6, so that the 55V of the power supply voltage input end, the positive switch selection module 1 and the negative switch selection module 2 form a loop, and power supply for the PD device is realized. After the PD equipment is pulled out, since the 25K resistor in the PD equipment cannot be detected, the 3V divided voltage is not generated, so that the controller U3 can control the power supply module 5 to suspend generating the 55V power supply voltage, and other devices connected with the 55V power supply voltage stop working, thereby reducing the power loss.
The comparator U7A operates in the same principle as the comparator U7B, and detects the voltage at the PD _ S terminal. The voltage dividing unit 6 is shown in fig. 2, and mainly provides reference voltages for the comparator U7A and the comparator U7B. In addition, in the PD identification module 3, a plurality of filtering units are further provided, which are mainly used for filtering out impurity signals in the voltage signal transmission process, and avoiding affecting the voltage comparison result. Further, this embodiment still is provided with warning light module 7, as shown in fig. 3, including warning light LED1 and warning light LED2 that all are connected with controller U3, warning light LED1 is used for showing whether power module 5 is in operating condition, and warning light LED2 is used for showing the power supply volume of power module 5, can set up according to actual conditions, and this embodiment does not do the restriction.
In this embodiment, when the PD device is not plugged, the controller U3 cannot read the voltage of the 25K voltage-dividing resistor, and the power supply portion is not enabled, and the power supply 55v does not output, so that the idle efficiency is optimized. When the PD equipment is inserted, the resistors inside the PD equipment divide voltage, the controller U3 reads the voltage change of the voltage-dividing resistor, the power supply enabling module 4 is operated to enable the power supply module 5 to output 55V, then the first relay LS1 is pulled in, the 55V is pulled in, a loop is formed through the PD equipment, and power supply is completed. In the circuit principle, the embodiment firstly controls the voltage input to the resistor R45 through the cooperation between the first relay LS1 and the second relay LS2, and then the PD identification module 3 identifies the voltage accessed by the PD equipment, so that whether a signal is output to the power supply enabling module 4 by the control controller U3 or not is controlled, the power supply enabling module 4 is actually an enabling control end of the power supply module 5, whether the power supply module 5 provides 55V voltage for the PD equipment is controlled, the insertion function of the PD equipment is automatically identified, whether the power supply module 5 generates 55V voltage or not is flexibly controlled, the power supply loss in no-load is effectively reduced, and the realization of six-level energy consumption is facilitated.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. An apparatus for automatically recognizing insertion of a PD device, characterized in that: the device comprises a controller U3, a positive switch selection module, a negative switch selection module, a PD identification module, a power supply enabling module and a power supply module;
the positive switch selection module is provided with an identification voltage input end, a power supply voltage input end, a positive voltage output end and a positive closed control end; the negative switch selection module is provided with a negative voltage input end, an identification voltage output end and a negative closed control end; when the PD equipment is accessed, the positive pole of the PD equipment is connected with the positive pole voltage output end, and the negative pole of the PD equipment is connected with the negative pole voltage input end;
the identification voltage output end of the negative switch selection module is connected with the input end of the PD identification module, and the output end of the PD identification module is connected with the controller U3;
the input end of the power supply enabling module is connected with the controller U3, the output end of the power supply enabling module is connected with the power supply module, the controller U3 controls whether the power supply module outputs power supply voltage or not through the power supply enabling module, and the voltage output end of the power supply module is connected with the power supply voltage input end of the positive switch selection module;
the controller U3 is connected with the positive closed control end and the negative closed control end, and controls the positive voltage output end to be connected with the identification voltage input end or the power supply voltage input end through the positive closed control end;
the positive switch selection module comprises a first relay LS1 and a first closing control unit, wherein a normally open contact of the first relay LS1 is an identification voltage input end, a closed contact of the first relay LS1 is a power supply voltage input end, a switch end of the first relay LS1 is a positive voltage output end, an input end of the first closing control unit is a positive closing control end, and the first closing control unit is used for controlling whether a coil of the first relay LS1 is electrified or not and further controlling whether the first relay LS1 is attracted or not;
the negative switch selection module comprises a second relay LS2 and a second closing control unit, a normally open contact of the second relay LS2 is an identification voltage output end, a switch end of the second relay LS2 is a negative voltage input end, an input end of the second closing control unit is a negative closing control end, and the second closing control unit is used for controlling whether a coil of the second relay LS2 is electrified or not so as to control whether the second relay LS2 is attracted or not;
the device for automatically identifying the insertion of the PD equipment further comprises a prompt lamp module, wherein the prompt lamp module comprises a prompt lamp LED1 and a prompt lamp LED2 which are connected with the controller U3, the prompt lamp LED1 is used for displaying whether the power supply module is in a working state, and the prompt lamp LED2 is used for displaying the power supply amount of the power supply module.
2. The apparatus of claim 1, wherein the means for automatically recognizing the insertion of the PD device is further configured to: first closed control unit includes switch tube Q1, resistance R50, resistance R40 and diode D2, controller U3 passes through resistance R50 and is connected with switch tube Q1's control end, switch tube Q1's switch end with first relay LS 1's coil is connected, resistance R40's both ends are connected with switch tube Q1's control end and ground end respectively, diode D2's both ends are connected with the both ends of first relay LS 1's coil respectively, and diode D2's positive pole is connected with switch tube Q1's switch end.
3. The apparatus of claim 1, wherein the means for automatically recognizing the insertion of a PD device is further configured to: the second closed control unit comprises a switch tube Q2, a resistor R51, a resistor R41 and a diode D3, the controller U3 is connected with the control end of the switch tube Q2 through the resistor R51, the switch end of the switch tube Q2 is connected with the coil of the second relay LS2, the two ends of the resistor R41 are respectively connected with the control end and the ground end of the switch tube Q2, the two ends of the diode D3 are respectively connected with the two ends of the coil of the second relay LS2, and the anode of the diode D3 is connected with the switch end of the switch tube Q2.
4. The apparatus of claim 1, wherein the means for automatically recognizing the insertion of the PD device is further configured to: the PD identification module comprises a resistor R45, a comparator U7B, a diode D18, a switch tube Q3 and a voltage division unit, an identification voltage output end of the negative switch selection module is connected with a positive input end of the comparator U7B through the resistor R45, a reverse input end of the comparator U7B is connected with an output end of the voltage division unit, an output end of the comparator U7B is connected with an anode of the diode D18, a cathode of the diode D18 is connected with a control end of the switch tube Q3, and a switch end of the switch tube Q3 is connected with the controller U3.
5. The apparatus of claim 4, wherein the means for automatically recognizing the insertion of the PD device is further configured to: the PD identification module further comprises a resistor R44, a comparator U7A and a diode D4, the identification voltage output end of the negative switch selection module is connected with the positive input end of the comparator U7A through the resistor R44, the reverse input end of the comparator U7A is connected with the output end of the voltage division unit, the output end of the comparator U7A is connected with the anode of the diode D4, and the cathode of the diode D4 is connected with the control end of the switch tube Q3.
6. The apparatus of claim 1, wherein the means for automatically recognizing the insertion of a PD device is further configured to: the power enable module includes switch tube Q5, switch tube Q6, resistance R55, resistance R54, resistance R57 and resistance 58, controller U3 is connected with switch tube Q5's control end through resistance R55, and switch tube Q5's switch end is connected with switch tube Q6's control end, and resistance R54 is the pull-up resistance of switch tube Q5's switch end, and switch tube Q5's switch end passes through resistance R57 and is connected with switch tube Q6's switch end, switch tube Q6's switch end with power module connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110699136.6A CN113381501B (en) | 2021-06-23 | 2021-06-23 | Device for automatically identifying insertion of PD equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110699136.6A CN113381501B (en) | 2021-06-23 | 2021-06-23 | Device for automatically identifying insertion of PD equipment |
Publications (2)
| Publication Number | Publication Date |
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| CN113381501A CN113381501A (en) | 2021-09-10 |
| CN113381501B true CN113381501B (en) | 2022-12-09 |
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| CN105991294A (en) * | 2015-02-09 | 2016-10-05 | 华为技术有限公司 | PoE (Power over Ethernet) power compensation method and PSE (Power Sourcing equipment) |
| CN207399229U (en) * | 2017-09-19 | 2018-05-22 | 浙江大华技术股份有限公司 | A kind of POE electric power systems |
| CN207460205U (en) * | 2017-12-06 | 2018-06-05 | 杭州海康威视数字技术股份有限公司 | Power supply circuit, trunking and Power over Ethernet system |
| CN109194492A (en) * | 2018-06-27 | 2019-01-11 | 华为技术有限公司 | A kind of powered device PD and Power over Ethernet POE system |
| CN215528686U (en) * | 2021-06-23 | 2022-01-14 | 广东优力普物联科技有限公司 | Device for reducing no-load power of switch |
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| CN102857105A (en) * | 2011-06-30 | 2013-01-02 | 海洋王照明科技股份有限公司 | Switch power source circuit and corresponding switch power source device |
| US20160183351A1 (en) * | 2013-03-25 | 2016-06-23 | Ids-Ip Holdings Llc | System, method, and apparatus for powering intelligent lighting networks |
| EP2879270B1 (en) * | 2013-04-17 | 2016-09-21 | Huawei Technologies Co., Ltd. | Identification circuit of power supply device, and powered device |
| EP3723266A4 (en) * | 2017-12-06 | 2021-01-06 | Hangzhou Hikvision System Technology Co., Ltd. | Power supply circuit, relay device, and power-over-ethernet system |
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| CN105991294A (en) * | 2015-02-09 | 2016-10-05 | 华为技术有限公司 | PoE (Power over Ethernet) power compensation method and PSE (Power Sourcing equipment) |
| CN207399229U (en) * | 2017-09-19 | 2018-05-22 | 浙江大华技术股份有限公司 | A kind of POE electric power systems |
| CN207460205U (en) * | 2017-12-06 | 2018-06-05 | 杭州海康威视数字技术股份有限公司 | Power supply circuit, trunking and Power over Ethernet system |
| CN109194492A (en) * | 2018-06-27 | 2019-01-11 | 华为技术有限公司 | A kind of powered device PD and Power over Ethernet POE system |
| CN215528686U (en) * | 2021-06-23 | 2022-01-14 | 广东优力普物联科技有限公司 | Device for reducing no-load power of switch |
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