CN101232170A - Automatic switchover circuit and power supplying circuit with automatic switchover function - Google Patents
Automatic switchover circuit and power supplying circuit with automatic switchover function Download PDFInfo
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- CN101232170A CN101232170A CNA2007100082694A CN200710008269A CN101232170A CN 101232170 A CN101232170 A CN 101232170A CN A2007100082694 A CNA2007100082694 A CN A2007100082694A CN 200710008269 A CN200710008269 A CN 200710008269A CN 101232170 A CN101232170 A CN 101232170A
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Abstract
The invention relates to an automatic switch circuit of power supply circuit and a power supply circuit provided with automatic switch function. The power supply circuit comprises a diverter switch for determining a working mode. The automatic switch circuit determines the specification of an AC input power supply by using at least one comparer and inputs control signals with different levels according to different AC input voltages, wherein the signals are used for controlling the diverter switch. The power supply circuit can still provide a stable output voltage meeting the requirement without manual switching.
Description
Technical field
The present invention relates to a kind of power circuit, refer to especially a kind ofly can differentiate input ac voltage automatically and the automatic control power supply circuit of the mode of operation of automatic control power supply circuit and have the power supply circuit of automatic switching function.
Background technology
Please refer to shown in Figure 5ly, is the rectification multiple pressuring circuit of a manual switchover commonly used, and its element comprises:
One full-bridge rectifier is made up of four diode D1～D4, and its two input connects an alternating current input power supplying AC;
Two output capacitance C1, C2 are connected between two outputs of this full-bridge rectifier.
Aforementioned rectification multiple pressuring circuit has two kinds of switch modes, is respectively 115Vac and 230Vac, and according to the size of alternating current input power supplying, the user adopts manual mode to switch between these two kinds of patterns in good time.
When alternating current input power supplying is 115V, must carry out multiplication of voltage because desire obtains a higher output voltage handles, so switch is switched to the 115Vac gear to operate under the rectification and voltage multiplier pattern, when AC-input voltage is positive half cycle, the input power supply is through the rectification of diode D1, to capacitor C1 charging, this capacitor C1 is charged to a crest voltage.
Please refer to Fig. 6, when alternating current input power supplying during at negative half period, the input power supply to capacitor C2 charging, makes capacitor C2 boost to crest voltage through the rectification of diode D4, thus at last always output voltage V dc be the total value of capacitor C1 and C2
On the other hand,, handle, just can directly export after handling by full-bridge rectifier just must not carry out multiplication of voltage again if when alternating current input power supplying itself is 230Vac.At this moment, the user switches to the 230Vac gear with this switch, operates under the full-wave bridge rectifier and produces an output voltage
Though aforementioned circuit can meet the output voltage of demand in response to different alternating current input power supplying size generations one, but because this circuit is to adopt the people to be the manual switchover operation, when the user misplugs the mains ac power supply, for example electric main is 230V but is transformed into the gear of 115Vac, the lighter causes the power supply unit remarkable action, weight person causes power supply unit damage and injury to personnel, so have certain danger aspect practical application.
Summary of the invention
In view of tradition is the operational hazards problem of being derived with the manual switchover rectification multiple pressuring circuit according to different alternating current input power supplyings, the present invention is directed to this shortcoming a solution is provided, to ensure user's personal safety and the power supply unit safety and stability when working.
The automatic switch-over circuit that the purpose of this invention is to provide a kind of power supply circuit can be according to the specification of alternating current input power supplying and one in the automatic control power supply supply circuit switches switch, makes this power supply circuit that one satisfactory output voltage can be provided.
For reaching aforementioned purpose, this automatic switch-over circuit has one first comparator and a switching signal control unit at least.This comparator has first input end, second input and an output, this first input end connects a reference voltage, second input connects an end of an alternating current input power supplying and produces one first input voltage, and this first comparator determines its output voltage according to first input voltage and reference voltage; This switching signal control unit connects the output of this first comparator, controls the diverter switch of power supply circuit according to the output voltage of first comparator.
Aforementioned automatic switch-over circuit can further comprise one second comparator, second comparator also has first input end, second input and an output, the first input end of this second comparator connects this reference voltage, second input connects the other end of alternating current input power supplying, and produce one second input voltage at second input, this second comparator determines its output voltage according to second input voltage and reference voltage, and the output of second comparator connects this switching signal control unit.
Another object of the present invention provides a kind of power supply circuit of tool automatic switching function, this power supply circuit can be judged the specification of alternating current input power supplying, control one is switched switch and is operated in a rectification and voltage multiplier pattern or a full-wave rectification pattern, is artificially providing a stable output voltage under the switch mode.
For reaching aforementioned purpose, this power supply circuit includes a rectification multiple pressuring circuit and an automatic switch-over circuit, wherein:
Rectification multiple pressuring circuit has:
One full-bridge rectifier, first, second input of this full-bridge rectifier connects an alternating current input power supplying;
Two output capacitances are connected between two outputs of this full-bridge rectifier;
One switches switch, and the one end is connected the first input end of this full-bridge rectifier, and this diverter switch other end can switch to the serially connected nodes of aforementioned two output capacitances, or switches to an idle contact;
And this automatic switch-over circuit comprises:
One first comparator, have first input end, second input and an output, the first input end of this first comparator connects a reference voltage, second input connects an end of alternating current input power supplying and produces one first input voltage, and this first comparator determines its output voltage according to first input voltage and reference voltage;
One switching signal control unit, one input end connects the output of this first comparator, controls this diverter switch according to the output voltage of first comparator and switches between serially connected nodes and idle contact.
Description of drawings
Fig. 1 is the detailed circuit diagram of first embodiment of the invention;
Fig. 2 is the detailed circuit diagram of second embodiment of the invention;
Fig. 3 is the detailed circuit diagram of third embodiment of the invention;
Fig. 4 is the detailed circuit diagram of fourth embodiment of the invention;
Fig. 5 is that the rectification multiple pressuring circuit of a manual switchover commonly used is in the circuit diagram of positive half cycle work;
Fig. 6 is that the rectification multiple pressuring circuit of a manual switchover commonly used is in the circuit diagram of negative half period work.Among the figure,
100 rectification multiple pressuring circuits, 200 automatic switch-over circuits
21 first comparators, 22 second comparators
23 switching signal control unit 22a, 22b, 22c comparator
AC alternating current input power supplying D1～D6 diode
C1, C2 output capacitance R1～R5 resistance
Embodiment
Please refer to shown in Figure 1ly, be the detailed circuit diagram of first embodiment of the invention, connect an automatic switch-over circuit 200 on a rectification multiple pressuring circuit 100, this rectification multiple pressuring circuit 100 comprises:
One full-bridge rectifier is made up of four diode D1～D4, and its two input connects an alternating current input power supplying AC;
Two output capacitance C1, C2 are connected between two outputs of this full-bridge rectifier;
One switches switch S 1, the one end is connected a wherein input of this full-bridge rectifier, this diverter switch S1 other end can switch to the serially connected nodes a of aforementioned two output capacitance C1, C2, or switches to an idle contact b, and this diverter switch S1 can utilize a relay or semiconductor element to constitute.
200 of this automatic switch-over circuits comprise:
One first comparator 21, have a non-inverting input, a reverse input end and an output, this reverse input end connects a reference voltage Vref, connect one first voltage divider on the non-inverting input, this first voltage divider is made of to provide this non-inverting input the first input voltage V1 first resistance R 1, second resistance R, 2 polyphones, and the other end of this first resistance R 1 is connected to the end of alternating current input power supplying AC by a rectifier diode D5;
One second comparator 22, have a non-inverting input, a reverse input end and an output, this reverse input end connects reference voltage Vref, connect one second voltage divider on the non-inverting input, this second voltage divider is made of to provide this non-inverting input the second input voltage V2 the 3rd resistance R 3, the 4th resistance R 4 polyphones, and the other end of the 3rd resistance R 3 is connected to the other end of alternating current input power supplying AC by another rectifier diode D6;
One switching signal control unit 23, its input connect the output of aforementioned first comparator 21 and second comparator 22, and the output of this switching signal control unit 23 then is the diverter switch S1 in this rectification multiple pressuring circuit 100 of control.
The operation principle of aforementioned circuit is as follows: when the process diode D5 rectification of alternating current positive pressure half cycle and after through the first voltage divider dividing potential drop, can produce the first input voltage V1 at the non-inverting input of first comparator 21; In like manner, when the process diode D6 rectification of alternating voltage negative half period and after, can obtain the second input voltage V2 at the non-inverting input of second comparator 22 through the second voltage divider dividing potential drop.The first input voltage V1 and the second input voltage V2 will determine two comparators 21,22 to be output as a positive saturation voltage or a negative saturation voltage, behind this switching signal control unit 23 of voltage signal process of two comparators, 21,22 outputs, direct control its switch S1.
(1), when the voltage of this alternating current input power supplying AC is 115Vac, alternating voltage is through diode D5, the D6 rectification is also respectively through first voltage divider, the second voltage divider dividing potential drop and produce the first input voltage V1 and the second input voltage V2, because V1＜Vref and V2＜Vref, so two comparators 21,22 output is all negative saturation voltage, behind this negative saturation voltage process switching signal control unit 23, diverter switch S1 is switched to output capacitance C1, the serially connected nodes a point of C2, because diverter switch S1 is connected in a point, so the circuit operation of rectification multiple pressuring circuit 100 is a rectification and voltage multiplier, therefore obtain the output voltage V dc after the multiplication of voltage, this output voltage V dc is about
(2), when the voltage of this alternating current input power supplying AC is 230Vac, alternating voltage is through D5, the D6 rectification is also respectively through first voltage divider, the second voltage divider dividing potential drop produces the first input voltage V1 and the second input voltage V2, because V1＞Vref or V2＞Vref, so first comparator 21, the output of second comparator 22 is positive saturation voltage, behind this positive saturation voltage process switching signal control unit 23, aforementioned diverter switch S1 is switched to idle contact b point, because diverter switch S1 switches on the b point, so the circuit operation of rectification multiple pressuring circuit 100 is a full-wave bridge rectifier, can obtain output voltage V dc, this output voltage values is about
Please refer to shown in Figure 2, be second embodiment of the invention, be only to use in this automatic switch-over circuit 200 a comparator 22a with the first embodiment difference part, the reverse input end of this comparator 22a connects a reference voltage Vref, connect a voltage divider on the non-inverting input, this voltage divider is by three resistance R 5, R3, the R4 formation of contacting in regular turn, to provide this non-inverting input one input voltage V2, wherein the other end of resistance R 5 is connected to the end of alternating current input power supplying AC by a rectifier diode D5, and the serially connected nodes of resistance R 5 and R3 is connected to the other end of alternating current input power supplying AC by another rectifier diode D6.
The circuit operation of this second embodiment is identical with first embodiment, all be to utilize the voltage and the reference voltage of the non-inverting input of comparator 22a to compare, and then determine that comparator 22a is positive saturation voltage of output or negative saturation voltage, desires to switch to node a or node b by this switching signal control unit 23 control its switch S1 again.
Fig. 3 is the circuit diagram of third embodiment of the invention, only use a comparator 22b in this automatic switch-over circuit 200, the reverse input end of this comparator 22b connects a reference voltage Vref, connect a voltage divider on the non-inverting input, this voltage divider is made of two resistance R 3, R4 polyphone, to provide this non-inverting input one input voltage V2, wherein the other end of resistance R 3 is connected to the negative terminal of alternating current input power supplying AC by a rectifier diode D6.
Fig. 4 is the circuit diagram of fourth embodiment of the invention, and its discrepancy only is the divider resistance R3 of comparator 22c non-inverting input, is connected to the anode of alternating current input power supplying AC by a rectifier diode D5.
Aforementioned the 3rd, the 4th embodiment compares with the voltage of the non-inverting input of comparator 22b and reference voltage, and then determine that comparator 22b, 22c are positive saturation voltage of output or negative saturation voltage, desire to switch to node a or node b by this switching signal control unit 23 control its switch S1 again.
Automatic switch-over circuit 200 among aforementioned each embodiment can effectively be applied on the various exchange type power transducer, comprise: on the transducers such as various reverse formulas (Flyback), forward type (Forward) and bridge-type, make the input direct voltage of each transducer too big variation not arranged because of the difference of AC-input voltage.
In sum, but which kind of specification is the present invention's Auto-Sensing AC-input voltage be, and then control diverter switch in the rectification multiple pressuring circuit automatically, make this rectification multiple pressuring circuit that one output voltage that meets demand can be provided under a rectification and voltage multiplier pattern or a full-bridge rectification pattern automatically, need not avoid the caused danger of faulty operation with artificial switching.
Claims (10)
1. the automatic switch-over circuit of a power supply circuit, this power supply circuit comprise one and switch switch, it is characterized in that this automatic switch-over circuit comprises:
One first comparator, have first input end, second input and an output, this first input end connects a reference voltage, second input connects an end of an alternating current input power supplying and produces one first input voltage, and this first comparator determines its output voltage according to first input voltage and reference voltage;
One switching signal control unit, one input end connects the output of this first comparator, controls the diverter switch of power supply circuit according to the output voltage of first comparator.
2. the automatic switch-over circuit of power supply circuit according to claim 1 is characterized in that, second input of this first comparator connects one first voltage divider, and this first voltage divider connects this alternating current input power supplying and dividing potential drop produces this first input voltage.
3. the automatic switch-over circuit of power supply circuit according to claim 2 is characterized in that, this first voltage divider connects this alternating current input power supplying by a diode, and this first voltage divider is made of a plurality of resistance series connection.
4. according to the automatic switch-over circuit of any described power supply circuit of claim 1 to 3, it is characterized in that this first voltage divider connects the two ends of this alternating current input power supplying.
5. according to the automatic switch-over circuit of any described power supply circuit of claim 1 to 3, it is characterized in that this automatic switch-over circuit further comprises:
One second comparator, have first input end, second input and an output, the first input end of this second comparator connects this reference voltage, second input connects the other end of alternating current input power supplying, and producing one second input voltage at second input, this second comparator determines its output voltage according to second input voltage and reference voltage.
6. the automatic switch-over circuit of power supply circuit according to claim 5 is characterized in that, second input of this second comparator connects one second voltage divider, and this second voltage divider connects this alternating current input power supplying and dividing potential drop produces this second input voltage.
7. the automatic switch-over circuit of power supply circuit according to claim 6, this second voltage divider connects this alternating current input power supplying by a diode, and this second voltage divider is made of a plurality of resistance series connection.
8. the power supply circuit with automatic switching function is characterized in that, comprises:
One rectification multiple pressuring circuit comprises:
One full-bridge rectifier, first, second input of this full-bridge rectifier connects an alternating current input power supplying;
Two output capacitances are connected between two outputs of this full-bridge rectifier;
One switches switch, and the one end is connected the first input end of this full-bridge rectifier, and this diverter switch other end can switch to the serially connected nodes of aforementioned two output capacitances, or switches to an idle contact;
One automatic switch-over circuit comprises:
One first comparator, have first input end, second input and an output, the first input end of this first comparator connects a reference voltage, second input connects an end of alternating current input power supplying and produces one first input voltage, and this first comparator determines its output voltage according to first input voltage and reference voltage;
One switching signal control unit, one input end connects the output of this first comparator, controls this diverter switch according to the output voltage of first comparator and switches between serially connected nodes and idle contact.
9. the power supply circuit with automatic switching function according to claim 8, it is characterized in that, second input of first comparator of this automatic switch-over circuit connects one first voltage divider, and this first voltage divider connects this alternating current input power supplying and dividing potential drop produces this first input voltage.
10. the power supply circuit with automatic switching function according to claim 9 is characterized in that, this first voltage divider connects this alternating current input power supplying by a diode, and this first voltage divider is made of a plurality of resistance series connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100082694A CN101232170A (en) | 2007-01-26 | 2007-01-26 | Automatic switchover circuit and power supplying circuit with automatic switchover function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100082694A CN101232170A (en) | 2007-01-26 | 2007-01-26 | Automatic switchover circuit and power supplying circuit with automatic switchover function |
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| Publication Number | Publication Date |
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| CN101232170A true CN101232170A (en) | 2008-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100082694A Pending CN101232170A (en) | 2007-01-26 | 2007-01-26 | Automatic switchover circuit and power supplying circuit with automatic switchover function |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102299617A (en) * | 2011-08-23 | 2011-12-28 | 杨义根 | Automatic voltage switch and implementation method thereof |
| CN104467461A (en) * | 2013-09-18 | 2015-03-25 | 深圳市海洋王照明工程有限公司 | Automatic dual voltage switching circuit |
| CN104682680A (en) * | 2015-01-29 | 2015-06-03 | 广州金升阳科技有限公司 | Rectification and filtering method and circuit |
| CN105553296A (en) * | 2015-12-16 | 2016-05-04 | 深圳市新国都支付技术有限公司 | Power supply compatible circuit |
| CN106787048A (en) * | 2017-01-04 | 2017-05-31 | 上海广为美线电源电器有限公司 | Possesses the charger of automatic identification input voltage function |
| WO2018113513A1 (en) * | 2016-12-22 | 2018-06-28 | 赤多尼科两合股份有限公司 | Voltage converter |
| CN108815700A (en) * | 2018-04-10 | 2018-11-16 | 西安八水健康科技有限公司 | A method of regulating and controlling treatment Gilles de la Tourette's syndrome instrument through cranium electric nerve and prevents maloperation |
| CN109067248A (en) * | 2018-09-16 | 2018-12-21 | 天津大学 | A kind of adaptive power conditioning circuit for piezoelectric vibration prisoner's energy |
| CN109067153A (en) * | 2018-09-04 | 2018-12-21 | 广东明丰电源电器实业有限公司 | A kind of high-low pressure input rectifying filter circuit |
| CN109302098A (en) * | 2018-09-16 | 2019-02-01 | 天津大学 | A kind of zero-point voltage biasing reverse circuit for piezoelectric cantilever |
| CN109378998A (en) * | 2018-09-16 | 2019-02-22 | 天津大学 | A kind of automatic conditioning circuit of piezoelectric cantilever voltage based on detection current zero |
| CN112737353A (en) * | 2019-10-29 | 2021-04-30 | 安徽美芝制冷设备有限公司 | Variable frequency controller, control method thereof, compressor control system and refrigeration equipment |
| WO2023005504A1 (en) * | 2021-07-30 | 2023-02-02 | Oppo广东移动通信有限公司 | Receiving circuit, chip, electronic device, charging system, and charging method |
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2007
- 2007-01-26 CN CNA2007100082694A patent/CN101232170A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102299617B (en) * | 2011-08-23 | 2014-04-30 | 杨义根 | Automatic voltage switch and implementation method thereof |
| CN102299617A (en) * | 2011-08-23 | 2011-12-28 | 杨义根 | Automatic voltage switch and implementation method thereof |
| CN104467461A (en) * | 2013-09-18 | 2015-03-25 | 深圳市海洋王照明工程有限公司 | Automatic dual voltage switching circuit |
| CN104467461B (en) * | 2013-09-18 | 2018-09-04 | 深圳市海洋王照明工程有限公司 | Multiplication of voltage automatic switching circuit |
| CN104682680A (en) * | 2015-01-29 | 2015-06-03 | 广州金升阳科技有限公司 | Rectification and filtering method and circuit |
| CN105553296A (en) * | 2015-12-16 | 2016-05-04 | 深圳市新国都支付技术有限公司 | Power supply compatible circuit |
| US10630198B2 (en) | 2016-12-22 | 2020-04-21 | Tridonic Gmbh & Co Kg | Voltage converter |
| WO2018113513A1 (en) * | 2016-12-22 | 2018-06-28 | 赤多尼科两合股份有限公司 | Voltage converter |
| CN106787048A (en) * | 2017-01-04 | 2017-05-31 | 上海广为美线电源电器有限公司 | Possesses the charger of automatic identification input voltage function |
| CN106787048B (en) * | 2017-01-04 | 2023-10-27 | 上海广为美线电源电器有限公司 | Charger with function of automatically identifying input voltage |
| CN108815700A (en) * | 2018-04-10 | 2018-11-16 | 西安八水健康科技有限公司 | A method of regulating and controlling treatment Gilles de la Tourette's syndrome instrument through cranium electric nerve and prevents maloperation |
| CN109067153A (en) * | 2018-09-04 | 2018-12-21 | 广东明丰电源电器实业有限公司 | A kind of high-low pressure input rectifying filter circuit |
| CN109302098A (en) * | 2018-09-16 | 2019-02-01 | 天津大学 | A kind of zero-point voltage biasing reverse circuit for piezoelectric cantilever |
| CN109378998A (en) * | 2018-09-16 | 2019-02-22 | 天津大学 | A kind of automatic conditioning circuit of piezoelectric cantilever voltage based on detection current zero |
| CN109302098B (en) * | 2018-09-16 | 2020-04-28 | 天津大学 | Zero voltage bias turnover circuit for piezoelectric cantilever beam |
| CN109067248B (en) * | 2018-09-16 | 2020-04-28 | 天津大学 | Self-adaptive power conditioning circuit for piezoelectric vibration energy harvesting |
| CN109067248A (en) * | 2018-09-16 | 2018-12-21 | 天津大学 | A kind of adaptive power conditioning circuit for piezoelectric vibration prisoner's energy |
| CN112737353A (en) * | 2019-10-29 | 2021-04-30 | 安徽美芝制冷设备有限公司 | Variable frequency controller, control method thereof, compressor control system and refrigeration equipment |
| WO2023005504A1 (en) * | 2021-07-30 | 2023-02-02 | Oppo广东移动通信有限公司 | Receiving circuit, chip, electronic device, charging system, and charging method |
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