CN204498148U - A kind of PoE switch giving non-standard equipment intelligent power supply - Google Patents
A kind of PoE switch giving non-standard equipment intelligent power supply Download PDFInfo
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- CN204498148U CN204498148U CN201520044950.4U CN201520044950U CN204498148U CN 204498148 U CN204498148 U CN 204498148U CN 201520044950 U CN201520044950 U CN 201520044950U CN 204498148 U CN204498148 U CN 204498148U
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- 238000002955 isolation Methods 0.000 claims description 12
- 238000005070 sampling Methods 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010606 normalization Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
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Abstract
The utility model relates to a kind of PoE switch, especially the PoE switch of non-standard equipment intelligent power supply.A kind of PoE switch of non-standard equipment intelligent power supply of giving of the utility model comprises MCU microcontroller, is provided with voltage comparator circuit between power supply port MCU microcontroller and described power supply port.Adopt such structure, make PoE switch not need non-standard outer source device also can be allowed normally to work when increasing power inverter, allow the operating voltage range of PoE drop to below 44V, expanded the range of application of PoE technology.The time no longer needing expensive power supply and install spent by power supply, save expense and time, save installing space, reduce the power loss of power supply.
Description
Technical field
The utility model relates to a kind of PoE switch, especially the PoE switch of non-standard equipment intelligent power supply.
Background technology
Existing PoE system all follows two international standards, be respectively IEEE802.3AF and IEEE802.3AT standard, in order to the larger power of network cable transmission reduce the loss of power in the transmitting procedure of netting twine can be allowed, in standard the operating voltage of PoE system setting higher, the voltage range that IEEE802.3AF standard specifies is between 44-57V, and the voltage range that IEEE802.3AT standard specifies is between 50-57V.This does not have problems for the standard P oE application using civil power as power supply.But standard P oE equipment is applied in does not have the occasion of civil power to meet difficulty, normally work to allow the PoE equipment of standard, just must be equipped with an inverter apparatus, lower supply voltage is become in the normalization voltage range of IEEE802.3AF (AT), but there are following three shortcomings in this mode:
A, cost increase: in order to allow the voltage range reaching IEEE802.3AF (AT) standard of supply voltage, need increase power inverter.
B, add the power loss of power supply: power inverter at work can the loss of some power, and general loss can reach about 20%.
C, add the installing space of equipment: the installation space needing to increase inverter, for the occasion in the less spaces such as big bus bus, the space requirement of erection unit is the smaller the better.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of to the PoE switch of non-standard equipment intelligent power supply, make PoE switch not need to allow the operating voltage range of PoE drop to below 44V when increasing power inverter, the scope of the supply voltage (12V, 24V or 36V) of the batteries on big bus bus, car, yacht can be adapted to.
In order to solve the problems of the technologies described above, a kind of PoE switch giving non-standard equipment intelligent power supply, comprises MCU microcontroller, and power supply port, is characterized in that: between described MCU microcontroller and described power supply port, be provided with voltage comparator circuit module.
Described a kind of PoE switch giving non-standard equipment intelligent power supply, is characterized in that: book voltage comparator circuit module comprises
DAC: setting comparator in current limit value be used for setting, be namely used for limit power supply port maximum current;
ADC: measure supply voltage, checks that whether power supply is working properly;
Comparator: compare the electric current measured by ADC with the electric current of DAC module setting, determines that can power supply port power;
Current sampling resistor: ADC measures the electric current of power supply port by current sampling resistor;
Isolation MOSFET: on-off action, closes the electric current to power supply port when electric current is greater than current setting value in described DAC or is less than 5mA, when electric current is less than current setting value in described DAC and is greater than 5mA to power supply port normal power supply;
Anti-reverse protection diode: be used for preventing from power receiving equipment has the power supply of opposed polarity to damage isolation MOSFET;
Described DAC is connected with MCU micro-control clamp dog with one end of described ADC, and the other end is connected with described comparator;
Described current sampling resistor one end is connected with described ADC, other end ground connection;
The G grid of described isolation MOSFET is connected with comparator, and S source electrode is by described current sampling resistor ground connection, and D drain electrode is connected with described anti-reverse protection diode and port of powering respectively.
Describedly a kind ofly give the PoE switch of non-standard equipment intelligent power supply, its particularly in: the power values being used for comparing set in described DAC can need to arrange different value according to user.
Describedly a kind ofly give the PoE switch of non-standard equipment intelligent power supply, its particularly in: the voltage range that described power supply port can provide is 12V-57V.
Adopt such structure, by redesigning the power supply port of PoE switch, PoE switch is made not need non-standard outer source device also can be allowed normally to work when increasing power inverter, the operating voltage range of PoE is allowed to drop to below 44V, the scope of the supply voltage (12V, 24V or 36V) of the batteries on big bus bus, car, yacht can be adapted to, by relaxing the operating voltage range of PoE, expand the range of application of PoE technology.The time no longer needing expensive power supply and install spent by power supply, save expense and time, save installing space, reduce the power loss of power supply.
Accompanying drawing explanation
Fig. 1: a kind of system block diagram (one of them port of powering) giving the PoE switch of non-standard equipment intelligent power supply of the utility model;
Fig. 2: a kind of workflow diagram giving the PoE switch of non-standard equipment intelligent power supply of the utility model.
Embodiment
Illustrate below in conjunction with Fig. 1, Fig. 2.
Embodiment one:
Fig. 1 be shown in PoE switch each power supply port be all provided with a voltage comparator circuit module, DAC (digital-to-analogue conversion device) is connected with MCU microcontroller with one end of ADC (modulus switching device), and the other end is connected with comparator; Current sampling resistor one end is connected with described ADC, other end ground connection; The G grid of isolation MOSFET is connected with comparator, and S source electrode is by described current sampling resistor ground connection, and D drain electrode is connected with described anti-reverse protection diode and port of powering respectively; Another termination feeder ear mouth of anti-reverse protection diode.
As shown in Figure 2 PoE switch power on after MCU microcontroller first by ADC (modulus switching device), supply voltage is measured, check power supply whether working properly.Whether after supply voltage is normal, starting detecting power supply port has short circuit, if the short circuit of power supply port, so time delay continues detecting power supply port for 10 seconds afterwards; If do not powered, port does not have short circuit, and MCU microcontroller just begins through power supply port and powers to power receiving equipment, measures the size of current that flows through of power supply port by current sampling resistor simultaneously.The current limit value that in the electric current measured by current sampling resistor and comparator, DAC (digital-to-analogue conversion device) sets compares, if when the current value measuring power supply port is very little (being less than 5mA), think that power supply port does not have external power receiving equipment or power receiving equipment pulls out, the G grid of isolation MOSFET and S source conduction, power supply port will close power supply, and whether time delay 5 seconds Posterior circle detection power supply ports have power receiving equipment to connect again; If the power supply port current value measured does not exceed current limit value, G grid and the D of isolation MOSFET drains conducting, and so power supply port can continue to power; When the current value measuring power supply port is greater than current limit value, G grid and the S source conduction of isolation MOSFET, power supply port shutdown power and time delay 5 seconds Posterior circle detect port of powering the current value of power receiving equipment in succession whether be greater than 5mA and be less than in the middle of current limit value.The power supply that anti-reverse protection diode is used to prevent from power receiving equipment having opposed polarity damages isolation MOSFET.
When MCU microcontroller measurement port electric current, MCU microcontroller can calculate the power that feeder ear mouth exports, then compare in comparator with the power arranged after the power of all power supply ports being added, when the gross power that all power supply ports export is greater than the performance number of power settings, MCU microcontroller can be powered power supply port shutdown low for priority, until the gross power that all of the port exports is less than or equal to the performance number of power settings.The power supply that anti-reverse protection diode is used to prevent from power receiving equipment having opposed polarity damages isolation MOSFET.
By reference to the accompanying drawings the preferred concrete mode of the utility model and embodiment are explained in detail above, but the utility model is not limited to the above-described embodiment and examples, in the ken that those skilled in the art possess, can also levy in the prerequisite not departing from the utility model design and make various change.
Claims (4)
1. give a PoE switch for non-standard equipment intelligent power supply, comprise MCU microcontroller, power supply port, is characterized in that: between described MCU microcontroller and described power supply port, be provided with voltage comparator circuit module.
2. a kind of to the PoE switch of non-standard equipment intelligent power supply according to claim 1, it is characterized in that: book voltage comparator circuit module comprises
DAC: setting comparator in current limit value be used for setting, be namely used for limit power supply port maximum current;
ADC: measure supply voltage, checks that whether power supply is working properly;
Comparator: compare the electric current measured by ADC with the electric current of DAC module setting, determines that can power supply port power;
Current sampling resistor: ADC measures the electric current of power supply port by current sampling resistor;
Isolation MOSFET: on-off action, closes the electric current to power supply port when electric current is greater than current setting value in described DAC or is less than 5mA, when electric current is less than current setting value in described DAC and is greater than 5mA to power supply port normal power supply;
Anti-reverse protection diode: be used for preventing from power receiving equipment has the power supply of opposed polarity to damage isolation MOSFET;
Described DAC is connected with MCU micro-control clamp dog with one end of described ADC, and the other end is connected with described comparator;
Described current sampling resistor one end is connected with described ADC, other end ground connection;
The G grid of described isolation MOSFET is connected with comparator, and S source electrode is by described current sampling resistor ground connection, and D drain electrode is connected with described anti-reverse protection diode and port of powering respectively.
3. a kind ofly according to claim 2 give the PoE switch of non-standard equipment intelligent power supply, its particularly in: the power values being used for comparing set in described DAC can need to arrange different value according to user.
4. a kind ofly according to claim 1 or 2 give the PoE switch of non-standard equipment intelligent power supply, its particularly in: the voltage range that described power supply port can provide is 12V-57V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520044950.4U CN204498148U (en) | 2015-01-22 | 2015-01-22 | A kind of PoE switch giving non-standard equipment intelligent power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520044950.4U CN204498148U (en) | 2015-01-22 | 2015-01-22 | A kind of PoE switch giving non-standard equipment intelligent power supply |
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| Publication Number | Publication Date |
|---|---|
| CN204498148U true CN204498148U (en) | 2015-07-22 |
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| CN201520044950.4U Active CN204498148U (en) | 2015-01-22 | 2015-01-22 | A kind of PoE switch giving non-standard equipment intelligent power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471591A (en) * | 2015-12-30 | 2016-04-06 | 浙江光大通信设备有限公司 | POE power supply system and power supply method |
| CN107306186A (en) * | 2016-04-25 | 2017-10-31 | 王云 | POE electric supply installations |
-
2015
- 2015-01-22 CN CN201520044950.4U patent/CN204498148U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471591A (en) * | 2015-12-30 | 2016-04-06 | 浙江光大通信设备有限公司 | POE power supply system and power supply method |
| CN105471591B (en) * | 2015-12-30 | 2018-08-21 | 浙江光大通信设备有限公司 | POE power supply systems and method of supplying power to |
| CN107306186A (en) * | 2016-04-25 | 2017-10-31 | 王云 | POE electric supply installations |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CB03 | Change of inventor or designer information |
Inventor after: Lu Xiaoyong Inventor after: Wu Guoshu Inventor after: Li Luke Inventor after: Bu Jindong Inventor after: Liu Jiang Inventor after: Xue Hui Inventor before: Lu Xiaoyong Inventor before: Wu Guoshu Inventor before: Li Luke |
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| COR | Change of bibliographic data | ||
| CP03 | Change of name, title or address |
Address after: 523000 Guangdong province Dongguan City Hengli Town Industrial Zone E third loop half mountains on the third floor Patentee after: UNIPOE IOT TECHNOLOGY Co.,Ltd. Address before: 523000 Guangdong Province, Dongguan City Heng Li Zhen Nan Huan Lu xinyongsheng high-tech electronic industrial park Patentee before: DONGGUAN UNIPOE INFORMATION TECHNOLOGY Co.,Ltd. |
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| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Dongguan City Hengli Town, Guangdong province 523000 half mountains third Dong Industrial Zone E floor Patentee after: UNIPOE IOT TECHNOLOGY Co.,Ltd. Address before: 523000 Guangdong province Dongguan City Hengli Town Industrial Zone E third loop half mountains on the third floor Patentee before: UNIPOE IOT TECHNOLOGY Co.,Ltd. |
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Address after: Room 1107-1112, building B1, Everbright wegu, No. 4, headquarters 2 Road, Songshan Lake high tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee after: GUANGDONG UNIPOE IOT TECHNOLOGY Co.,Ltd. Address before: Dongguan City Hengli Town, Guangdong province 523000 half mountains third Dong Industrial Zone E floor Patentee before: UNIPOE IOT TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right |
Effective date of registration: 20220517 Address after: Room 1109-1112, building 1, No.4, headquarters 2nd Road, Songshanhu Park, Dongguan City, Guangdong Province, 523000 Patentee after: Dongguan Youli ordinary letter Technology Co.,Ltd. Address before: Room 1107-1112, building B1, Everbright we Valley, No.4, headquarters 2nd Road, Songshanhu high tech Industrial Development Zone, Dongguan, Guangdong 523000 Patentee before: GUANGDONG UNIPOE IOT TECHNOLOGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
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Address after: 523000 room 1106, building 1, No. 4, second headquarters Road, Songshanhu Park, Dongguan City, Guangdong Province Patentee after: Dongguan Youli ordinary letter Technology Co.,Ltd. Address before: Room 1109-1112, building 1, No.4, headquarters 2nd Road, Songshanhu Park, Dongguan City, Guangdong Province, 523000 Patentee before: Dongguan Youli ordinary letter Technology Co.,Ltd. |
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