CN102237808A - Power supply and protection method thereof - Google Patents
Power supply and protection method thereof Download PDFInfo
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- CN102237808A CN102237808A CN2010101697630A CN201010169763A CN102237808A CN 102237808 A CN102237808 A CN 102237808A CN 2010101697630 A CN2010101697630 A CN 2010101697630A CN 201010169763 A CN201010169763 A CN 201010169763A CN 102237808 A CN102237808 A CN 102237808A
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Abstract
The invention discloses a power supply, which comprises a power supply module, a microprocessor, a protection mode setting unit, a plurality of switch units, a plurality of current sensing units and a plurality of output connectors, wherein each switch unit is connected with a corresponding output connector by a corresponding current sensing unit; the power supply module converts external AC power into DC power which is output to electronic equipment connected with the output connector by the switch unit and the current sensing unit; each current sensing unit senses an output current value of the corresponding output connector, and outputs the sensed current value to the microprocessor; and the microprocessor calculates the total power of the power supply module according to the received current value, and protects the power supply according to a protection mode set by the protection mode setting unit when the total power is higher than preset power. The invention also provides a protection method for the power supply.
Description
Technical field
The present invention relates to a kind of power supply unit and guard method thereof.
Background technology
At present, a common notebook computer need be arranged in pairs or groups one and is the power supply unit of its power supply.Under this situation, when there is executive session in company and participant when all holding notebook computer, the situation that the electric weight of battery of notebook computer has exhausted in order to prevent from not end takes place, every participant also must carry a power supply unit, will bring socket to lack and carry the puzzlement of inconvenience like this.
Summary of the invention
In view of above content, be necessary to provide a kind of power supply unit that can power for many notebook computers simultaneously.
Also be necessary to provide a kind of guard method of power supply device, so that described power supply unit is protected.
A kind of power supply unit; comprise a power supply module; one microprocessor; one protected mode setup unit; some switch elements; some current senses unit and some out connectors; each switch element links to each other by the current sense unit of the correspondence out connector corresponding with; described power supply unit module converts external ac power source to a direct current power supply; described DC power supply is exported to the electronic equipment that links to each other with described out connector by described switch element and described current sense unit; the size of the out connector output current of a correspondence is detected in each current sense unit; and the current value that detects exported to described microprocessor; described microprocessor calculates the gross power of described power supply unit module output according to the magnitude of voltage of current value that receives and described DC power supply; and when described gross power is preset power greater than one first; disconnect all switch elements; and be not more than the described first default power but during greater than one second default power in described gross power, the protected mode of setting according to described protected mode setup unit take turns power supply or disconnection and do not insert the corresponding switch element of out connector of electronic equipment to the electronic equipment of low load.
A kind of guard method of power supply unit comprises:
Set the protected mode of power supply unit;
To some power electronic equipment, and the size of the out connector output current that links to each other with each electronic equipment of detecting;
Calculate the gross power of described power supply unit output according to the magnitude of voltage of current value that detects and described power supply unit out-put supply, and whether more described gross power is greater than one first default power;
When described gross power is preset power greater than described first, disconnect switch elements all in the described power supply unit, to stop to described power electronic equipment;
When described gross power is not more than the described first default power but greater than one second default power, and described protected mode is during for powering mode in turn, and the electronic equipment of low load take turns to power; And
When described gross power is not more than the described first default power but greater than the described second default power, and described protected mode is during for the restriction output mode, disconnects in the described power supply unit and the corresponding switch element of out connector that does not insert electronic equipment.
The current value that power supply unit of the present invention detects according to described current sense unit by described microprocessor is controlled the keying of described switch element; and then control described out connector and whether provide power supply for described electronic equipment; and its guard method is by adopting powering mode and restriction output mode in turn; realized under the prerequisite that is no more than described power supply unit rated power the function that allows more electronic equipment energy acquisition power supply for more time supply.
Description of drawings
Below in conjunction with accompanying drawing and better embodiment the present invention is described in further detail.
Fig. 1 is that power supply device of the present invention is the schematic diagram of some power electronic equipment.
Fig. 2 is the theory diagram of power supply device better embodiment of the present invention.
Fig. 3 a-3b is the flow chart of the power guard method better embodiment in the guard method of power supply device of the present invention.
Fig. 4 is the flow chart of the current protection method better embodiment in the guard method of power supply device of the present invention.
Fig. 5 is the flow chart of the temperature protecting method better embodiment in the guard method of power supply device of the present invention.
The main element symbol description
Switch element 240
Out connector 260
Protected mode setup unit 270
Embodiment
Please common reference Fig. 1 and Fig. 2, the better embodiment of power supply unit 10 of the present invention comprises a power supply module 100 and a control module 200.Described control module 200 comprises an input connector 210, a voltage conversion unit 220, a microprocessor 230, some switch elements 240, some current senses unit 250, some out connectors 260, a protected mode setup unit 270, a temperature sensing unit 280 and a display unit 290.Described input connector 210 links to each other with described power supply module 100, described voltage conversion unit 220 and described switch element 240, each switch element 240 links to each other with an out connector 260 by a current sense unit 250, each out connector 260 can link to each other with an electronic equipment 30 (as notebook computer, mobile phone, PDA etc.), to give coupled electronic equipment 30 power supplies.In the present embodiment, each switch element 240 is corresponding with a current sense unit 250 and an out connector 260 respectively, the number that is described switch element 240, described current sense unit 250 and described out connector 260 equates, and concrete numerical value can be adjusted according to actual conditions.
The required DC power supply (as the DC power supply of 19V) of electronic equipment 30 as described in described power supply module 100 is used for the AC power of outside (as the AC power of 220V) converted to, and described DC power supply exported to described voltage conversion unit 220 and described switch element 240 by described input connector 210.Described voltage conversion unit 220 is used for converting described DC power supply to described microprocessor 230; described switch element 240; described current sense unit 250; described protected mode setup unit 270; the operating voltage (as the direct voltage of 5V) that described temperature sensing unit 280 and described display unit 290 are required, and be described microprocessor 230; described switch element 240; described current sense unit 250; described protected mode setup unit 270; described temperature sensing unit 280 and 290 power supplies of described display unit (described voltage conversion unit 220 and the described microprocessor 230 of anticipating out not shown in the figures; described switch element 240; described current sense unit 250; described protected mode setup unit 270; the annexation of described temperature sensing unit 280 and described display unit 290).Each current sense unit 250 is used to detect the size of out connector 260 output currents of a correspondence, and the current value that detects is exported to described microprocessor 230.Described protected mode setup unit 270 is used to set protected mode, and the protected mode of setting is exported to described microprocessor 230.Described temperature sensing unit 280 is used for the temperature height of the described voltage conversion unit 220 of sensing, described microprocessor 230, described switch element 240 and described current sense unit 250, and the temperature value that senses is exported to described microprocessor 230.Described microprocessor 230 is used to carry out relative program controlling the keying of described switch element 240 according to the temperature value of the current value of described current sense unit 250 outputs and 280 outputs of described temperature sensing unit, and takes corresponding protection method (concrete guard method can describe in detail below) according to the protected mode that described protected mode setup unit 270 is set.Described display unit 290 is used for display power supply information provision (gross power of power supply unit 10 outputs and the protected mode of setting etc. as described).In the present embodiment, described power supply module 100 is a powerful power supply unit (as the power supply unit of 640W), and described display unit 290 is a LCD.
Please consult Fig. 3 a-3b, Fig. 4 and Fig. 5 jointly, the guard method of power supply unit of the present invention mainly comprises three separate submethods, i.e. power guard method, current protection method and temperature protecting method.In the present embodiment, adopt three kinds of guard methods that described power supply unit 10 is protected simultaneously.In other embodiments, can choose according to actual needs wherein one or two kind of guard method described power supply unit 10 is protected.
Please continue to consult Fig. 3 a-3b; power guard method in the guard method of power supply unit of the present invention is used under the prerequisite that is no more than described power supply module 100 rated power; allow the acquisition power supply supplies that more electronic equipment 30 can the longer time, the better embodiment of described power guard method may further comprise the steps:
Step S31, described microprocessor 230 judge whether described power supply unit 10 has set protected mode, if do not set protected mode, execution in step S32; If set protected mode, execution in step S33.
Step S32, described display unit 290 display message prompting user sets protected mode, and returns step S31.In the present embodiment; described protected mode comprises powering mode and restriction output mode in turn; described power supply unit 10 is provided with two selector buttons corresponding to described powering mode in turn and described restriction output mode; the user can set the protected mode of described power supply unit 10 by pressing corresponding button.In other embodiments, the user can adopt other method to set protected mode according to actual conditions.
Step S33; the protected mode of described display unit 290 display settings; described microprocessor 230 sends control signal with the described switch element 240 of closure; the DC power supply of described power supply module 100 outputs is by described input connector 210; described switch element 240; described current sense unit 250 and described out connector 260 are transferred to the electronic equipment 30 that links to each other with described power supply unit 10; each current sense unit 250 is detected the size of out connector 260 output currents of a correspondence respectively, and the current value that detects is exported to described microprocessor 230.
Step S34, described microprocessor 230 calculates the gross power of described power supply module 100 outputs according to the magnitude of voltage in current value that receives and described power supply module 100 output DC sources, and whether more described gross power is greater than a default power W1.If be not more than described default power W1, execution in step S35; If greater than described default power W1, execution in step S39.In the present embodiment, the described default power W1 rated power that is described power supply module 100.
Step S35, whether described microprocessor 230 more described gross powers are greater than a default power W2.If be not more than described default power W2, return step S33; If greater than described default power W2, execution in step S36.In the present embodiment, the described default power W2 rated power that is described power supply module 100 deducts the numerical value of the rated power gained of an electronic equipment.For example: if the rated power of described power supply module 100 is 640W, the rated power of described electronic equipment is 90W, then described default power W2=640W-90W=550W.In other embodiments, described default power W2 can set other power less than described default power W1 for according to actual conditions.
Step S36, described microprocessor 230 judge that whether protected mode is powering mode in turn.If take turns powering mode, then execution in step S37; If not powering mode in turn is the restriction output mode, then execution in step S38.
Step S37, the corresponding switch element of described microprocessor 230 controls so that low load electronic equipment take turns to power, and returns step S34.In the present embodiment, because described electronic equipment 30 is equipped with battery, so during powering in turn, if described power supply unit 10 suspends a certain electronic equipment 30 power supplies, its internal cell still can be kept its operate as normal.And in the present embodiment, low load electronic equipment is meant the electronic equipment that consumed power is less, the current value that detects when the current sense unit hour, the power that its corresponding electronic appliance consumption is described is less, described microprocessor 230 is controlled corresponding switch element according to the current value that receives, take turns to power with the less electronic equipment of current value, thereby save electric energy to allow the acquisition power supply supply for more time of more electronic equipment energy to input.
Step S38, described microprocessor 230 sends control signal, with the corresponding switch element 240 of the out connector that disconnects and do not insert electronic equipment 30 260, and returns step S34.
Step S39, described microprocessor 230 sends control signal, and to disconnect all switch elements 240, described power supply unit 10 stops power supply output.
See also Fig. 4, the current protection method in the power guard method of power supply unit of the present invention is used to prevent the damage of overcurrent to described power supply unit 10, and the better embodiment of described current protection method may further comprise the steps:
Step S41, the DC power supply of described power supply module 100 outputs is transferred to the electronic equipment 30 that links to each other with described power supply unit 10 by described input connector 210, described switch element 240, described current sense unit 250 and described out connector 260, each current sense unit 250 is detected the size of out connector 260 output currents of a correspondence respectively, and the current value that detects is exported to described microprocessor 230.
Step S42, described microprocessor 230 judge whether the current value that receives surpasses a predetermined current value.If do not surpass described predetermined current value, then return step S41; If surpass described predetermined current value, then execution in step S43.In the present embodiment, described predetermined current value is the load current value of described electronic equipment 30, and when the load of a certain electronic equipment 30 is excessive, its required electric current will over-current condition promptly occur above described load current value.
Step S43, described microprocessor 230 judge that whether the current value that receives surpasses the number of times of described predetermined current value greater than a preset times in a time period.If be not more than described preset times, return step S41; If greater than described preset times, execution in step S44.In the present embodiment, judge that whether the current value that receives surpasses the number of times of described predetermined current value greater than described preset times in the described time period, be big, and then cause that the situation of erroneous judgement takes place in order to prevent the current value moment change that causes a certain out connector 260 to be exported because of some contingent situation.If the number of times that surpasses described predetermined current value in the described time period is greater than described preset times, then overcurrent has appearred in explanation really, but not contingent situation.
Step S44, described microprocessor 230 sent control signal and disconnect the switch element 240 that the number of times that surpasses described predetermined current value with the current value that detects and surpass links to each other greater than the current sense unit 250 of described preset times in the described time period, to stop out connector 260 out-put supplies corresponding with described switch element 240.For example, the current value that detects when a current sense unit 250 surpasses described predetermined current value and the number of times that surpasses during greater than described preset times in the described time period, described microprocessor 230 sends control signal to disconnect the switch element 240 that links to each other with described current sense unit 250, at this moment, the out connector 260 non-transformers output that links to each other with described current sense unit 250.
See also Fig. 5, the temperature protecting method in the guard method of power supply unit of the present invention is used to prevent that Yin Wendu is too high and the situation of damaging described power supply unit 10 takes place, and the better embodiment of described temperature protecting method may further comprise the steps:
Step S51, the DC power supply of described power supply module 100 outputs is transferred to the electronic equipment 30 that links to each other with described power supply unit 10 by described input connector 210, described switch element 240, described current sense unit 250 and described out connector 260, the temperature of the described voltage conversion unit 220 of described temperature sensing unit 280 sensings, described microprocessor 230, described switch element 240 and current sense unit 250 height, and the temperature value that senses exported to described microprocessor 230.
Step S52, whether the temperature value that described microprocessor 230 relatively senses surpasses a preset temperature value, if do not surpass described preset temperature value, then returns step S51; If surpass described preset temperature value, then execution in step S53.
Step S53, described microprocessor 230 send control signal and disconnect all switch elements 240, and described power supply unit 10 stops power supply output.
Claims (9)
1. power supply unit; comprise a power supply module; one microprocessor; one protected mode setup unit; some switch elements; some current senses unit and some out connectors; each switch element links to each other by the current sense unit of the correspondence out connector corresponding with; described power supply unit module converts external ac power source to a direct current power supply; described DC power supply is exported to the electronic equipment that links to each other with described out connector by described switch element and described current sense unit; the size of the out connector output current of a correspondence is detected in each current sense unit; and the current value that detects exported to described microprocessor; described microprocessor calculates the gross power of described power supply unit module output according to the magnitude of voltage of current value that receives and described DC power supply; and when described gross power is preset power greater than one first; disconnect all switch elements; and be not more than the described first default power but during greater than one second default power in described gross power, the protected mode of setting according to described protected mode setup unit take turns power supply or disconnection and do not insert the corresponding switch element of out connector of electronic equipment to the electronic equipment of low load.
2. power supply unit as claimed in claim 1, it is characterized in that: the described first default power is the rated power of described power supply module, and the rated power that the described second default power is described power supply module deducts the numerical value of the rated power gained of an electronic equipment.
3. power supply unit as claimed in claim 1, it is characterized in that: described microprocessor also compares a current value and a predetermined current value that receives, to judge whether to occur overcurrent, and disconnect and occur the corresponding switch element of out connector of overcurrent, power to corresponding electronic device stopping.
4. power supply unit as claimed in claim 1, it is characterized in that: also comprise a temperature sensing unit, described temperature sensing unit is used for the temperature of the described microprocessor of sensing, described switch element and described temperature detecting unit, and the temperature value that senses exported to described microprocessor, described microprocessor with the temperature value that receives and a preset temperature value relatively and disconnects described switch element during greater than described preset temperature value at arbitrary temperature value.
5. power supply unit as claimed in claim 1 is characterized in that: also comprise a display unit, described display unit is used to show the protected mode of described power supply unit and to the situation of described power electronic equipment.
6. the guard method of a power supply unit comprises:
Set the protected mode of power supply unit;
To some power electronic equipment, and the size of the out connector output current that links to each other with each electronic equipment of detecting;
Calculate the gross power of described power supply unit output according to the magnitude of voltage of current value that detects and described power supply unit out-put supply, and whether more described gross power is greater than one first default power;
When described gross power is preset power greater than described first, disconnect switch elements all in the described power supply unit, to stop to described power electronic equipment;
When described gross power is not more than the described first default power but greater than one second default power, and described protected mode is during for powering mode in turn, and the electronic equipment of low load take turns to power; And
When described gross power is not more than the described first default power but greater than the described second default power, and described protected mode is during for the restriction output mode, disconnects in the described power supply unit and the corresponding switch element of out connector that does not insert electronic equipment.
7. the guard method of power supply unit as claimed in claim 6; it is characterized in that: the described first default power is the rated power of described power supply unit, and the rated power that the described second default power is described power supply unit deducts the numerical value of the rated power gained of an electronic equipment.
8. the guard method of power supply unit as claimed in claim 6 is characterized in that: also comprise:
Whether the current value that relatively detects surpasses a predetermined current value;
When the current value that detects surpasses described predetermined current value, whether relatively in a time period, surpass the number of times of described predetermined current value greater than a preset times; And
The switch element that the number of times that disconnection and the current value that detects surpassed described predetermined current value and surpass described predetermined current value in the described time period links to each other greater than the current sense unit of described preset times is to stop to the out connector out-put supply corresponding with described switch element.
9. the guard method of power supply unit as claimed in claim 6 is characterized in that: also comprise:
The temperature of microprocessor, some temperature detecting units and some switch elements of the described power supply unit of sensing inside;
Whether the temperature value that relatively senses surpasses a preset temperature value; And
When surpassing described preset temperature value, the temperature value that senses disconnects switch elements all in the described power supply unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101697630A CN102237808A (en) | 2010-04-21 | 2010-04-21 | Power supply and protection method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101697630A CN102237808A (en) | 2010-04-21 | 2010-04-21 | Power supply and protection method thereof |
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| CN102237808A true CN102237808A (en) | 2011-11-09 |
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| CN2010101697630A Pending CN102237808A (en) | 2010-04-21 | 2010-04-21 | Power supply and protection method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103701086A (en) * | 2012-09-27 | 2014-04-02 | 英业达科技有限公司 | Circuit protection device |
| CN104062601A (en) * | 2014-06-09 | 2014-09-24 | 青岛东方循环能源有限公司 | Microwave power supply failure diagnosis device |
| CN104221267A (en) * | 2012-03-30 | 2014-12-17 | 株式会社村田制作所 | Switching power source device |
| CN105244850A (en) * | 2015-10-09 | 2016-01-13 | 深圳市沛城电子科技有限公司 | Battery protection circuit and control method therefor |
| CN105807641A (en) * | 2014-12-29 | 2016-07-27 | 联想(北京)有限公司 | Control method and electronic device |
| CN110137913A (en) * | 2019-05-16 | 2019-08-16 | 宁波奥克斯电气股份有限公司 | A kind of frequency conversion equipment PFC control method, control device and frequency conversion equipment |
| CN110226901A (en) * | 2018-03-05 | 2019-09-13 | 青岛海尔洗碗机有限公司 | A kind of control method of subregion dish-washing machine |
| US11050342B2 (en) | 2019-02-01 | 2021-06-29 | Chicony Power Technology Co., Ltd. | Power converter with over temperature protection compensation |
| US11050341B2 (en) | 2019-02-01 | 2021-06-29 | Chicony Power Technology Co., Ltd. | Power converter with over temperature protection compensation |
| CN116566281A (en) * | 2023-07-06 | 2023-08-08 | 深圳艾为电气技术有限公司 | Fault isolation control system and control method for electric compressor |
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| US9385617B2 (en) | 2012-03-30 | 2016-07-05 | Murata Manufacturing Co., Ltd. | Overcurrent protection circuit for a switching power supply apparatus |
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| CN110226901A (en) * | 2018-03-05 | 2019-09-13 | 青岛海尔洗碗机有限公司 | A kind of control method of subregion dish-washing machine |
| US11050342B2 (en) | 2019-02-01 | 2021-06-29 | Chicony Power Technology Co., Ltd. | Power converter with over temperature protection compensation |
| US11050341B2 (en) | 2019-02-01 | 2021-06-29 | Chicony Power Technology Co., Ltd. | Power converter with over temperature protection compensation |
| CN110137913A (en) * | 2019-05-16 | 2019-08-16 | 宁波奥克斯电气股份有限公司 | A kind of frequency conversion equipment PFC control method, control device and frequency conversion equipment |
| CN110137913B (en) * | 2019-05-16 | 2022-03-22 | 宁波奥克斯电气股份有限公司 | PFC (power factor correction) control method and device for frequency conversion equipment and frequency conversion equipment |
| CN116566281A (en) * | 2023-07-06 | 2023-08-08 | 深圳艾为电气技术有限公司 | Fault isolation control system and control method for electric compressor |
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Application publication date: 20111109 |