CN102856907A - Alternating voltage phase synchronization circuit - Google Patents
Alternating voltage phase synchronization circuit Download PDFInfo
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- CN102856907A CN102856907A CN2012102341923A CN201210234192A CN102856907A CN 102856907 A CN102856907 A CN 102856907A CN 2012102341923 A CN2012102341923 A CN 2012102341923A CN 201210234192 A CN201210234192 A CN 201210234192A CN 102856907 A CN102856907 A CN 102856907A
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Abstract
An alternating voltage phase synchronization circuit comprises: an optical phase detection part used for detecting a phase of a first alternating current power supply exerted from outside and outputting a phase detection signal; a power failure sensing part used for detecting whether the first alternating current power supply is failed and outputting a power failure sensing signal; a control part used for outputting a phase adjusting signal based on control of the phase detection signal; a second alternating current power supply generating part used for generating a phase of a second alternating current power supply in the way of the same as the phase of the first alternating current power supply when adjusting and outputting the second alternating current power supply according to control of the phase adjusting signal; and a selection part used for outputting one of the first alternating current power supply and the second alternating current power supply according to control of a selection signal.
Description
Technical field
The present invention relates to a kind of power control unit, relate more specifically to a kind of phase place with alternating voltage and carry out synchronous technology.
Background technology
It is indoor that the external system power supply enters family or factory etc. with sinusoidal wave form.UPS (Uninterruptable Power Supply, uninterrupted power supply) can be installed in the place that can cause more serious loss when having a power failure as generations such as factories, when running into unexpected power failure, comes the alternative system power supply with inner energy storage device.That is, in the UPS situation that externally system power supply is cut off, substitute immediately original power supply and AC power supplies is provided, if but apply the sine-wave power that phase place is not inconsistent, then may cause precision machinery or equipment to break down or cause the problems such as fire.Therefore, when having a power failure, need to confirm to cut off relevant phase information with the AC power supplies supply in which place has occured, can carry out Phase synchronization to the AC power supplies of system.The size of UPS by the AC voltage of supply when having a power failure, phase difference etc. carry out synchronously and are supplied to equipment, obtain to avoid equipping the effect that loss occurs.
Generally speaking, in order to realize the synchronization of AC power supplies, utilize PID control transducer or utilize analogue-to-digital converters (ADC) to receive and prognoses system voltage and carry out synchronized method.
Two numerical value of PID control sensor measurement calculate next action according to the error of two numerical value and by controller.The complexity of PID control transducer is high, and the end value of PID control transducer depends on the value of measuring ADC, but can't ignore the error of measuring ADC, and therefore than investment, the level of its expection is lower.
Summary of the invention
The invention provides and a kind ofly can either reduce complexity and cost, can tackle rapidly again the alternating voltage phase locking circuit of power failure situation.
According to one embodiment of present invention, provide a kind of alternating voltage phase locking circuit, comprising: transformer, the size of first AC power that will apply from the outside reduce in proportion and generate the first internal electric source; The variation adjusting portion is eliminated negative voltage by the skew of regulating described the first internal electric source, eliminates external noise by twice RC filter, again reduces to form the second internal electric source by the size with the first internal electric source; The optical phase test section detects phase place and the output phase detection signal of described the second internal electric source; Whether the power failure induction part detects described the first AC power and has a power failure and export the power failure induced signal; Control part is proofreaied and correct the phase place of the second AC power according to described phase detection signal, and generates for selecting to export the second AC power to replace the output control signal of the first AC power according to the power failure induced signal of being inputted by described power failure induction part; The second AC power generating unit receives order from described control part, proofreaies and correct to generate the second AC power; And selection portion, according to the output control signal from described control part, export an AC power in the first AC power and the second AC power.
According to another embodiment of the present invention, provide a kind of alternating voltage phase locking circuit, comprising: the optical phase test section, when detecting the phase place of the first AC power that applies from the outside, detect mutually different phase places and output as a plurality of phase detection signals; Whether the power failure induction part detects described the first AC power and has a power failure and export the power failure induced signal; Control part according to the control of described power failure induced signal, optionally activates and selects signal, and come the output phase conditioning signal according to described a plurality of phase detection signals; The second AC power generating unit according to the control of described phase adjustment signal, when regulating and exporting the phase place of the second AC power, generates the phase place of described the second AC power in the mode identical with the phase place of described the first AC power; Selection portion according to the control of described selection signal, is exported any one in described the first AC power and described the second AC power.
According to content of the present invention, not only can reduce the device number that consists of the alternating voltage phase locking circuit, reduce the complexity of circuit, and then the cost of minimizing circuit, and can reduce MCU (Micro Controller Unit, microcontroller) amount of calculation, and then the burden of minimizing MCU.In addition, by introducing optical switch element, by MCU receiving phase detection signal, can prevent the external AC power supply with for the short circuit between the internal DC power sources of the operation of MCU etc.
Description of drawings
Fig. 1 is alternating voltage phase locking circuit according to an embodiment of the invention;
Fig. 2 a is the structure chart according to the optical phase test section of Fig. 1 of first embodiment of the invention;
Fig. 2 b is the structure chart according to the optical phase test section of Fig. 1 of second embodiment of the invention;
Fig. 2 c is the structure chart according to the optical phase test section of Fig. 1 of third embodiment of the invention;
Fig. 3 a is the structure chart according to the power failure induction part of first embodiment of the invention;
Fig. 3 b is the structure chart according to the power failure induction part of second embodiment of the invention.
(description of reference numerals)
41: rectifier
Embodiment
Below, by the reference accompanying drawing, embodiments of the invention are elaborated, make the personnel that possess in the technical field of the invention general knowledge, can implement easily technological thought of the present invention.
Fig. 1 is alternating voltage phase locking circuit according to an embodiment of the invention.
With reference to Fig. 1, the alternating voltage phase locking circuit possesses transformer 10, variation adjusting portion 20, optical phase test section 30, power failure induction part 40, control part 50, the second AC power generating unit 60 and selection portion 70.
The concrete structure of the alternating voltage phase locking circuit of said structure and main action are as described below.
Transformer 10 receives the first AC power AC1 that applies from the outside, generates size and compares the first internal electric source AC1_1 that has reduced in proportion with the first AC power AC1.As a reference, the voltage swing degree of the first AC power AC1 and the first internal electric source AC1_1 can change according to different embodiment.
Whether power failure induction part 40 detects the second internal electric source AC1_2 and cuts off, namely whether have a power failure, and output power failure induced signal SENSE.That is, whether power failure induction part 40 detects the first AC power AC1 via the second internal electric source AC1_2 and has a power failure, and testing result is exported as power failure induced signal SENSE.
Optical phase test section 30 detects phase place and the output phase detection signal P_DET of the second internal electric source AC1_2.Optical phase test section 30 can be by optical switch element, can determine that the resistance section (R1 of Fig. 2 a) of detected phase size, the pull down resistor (R2 of Fig. 2 a) that reacts and export the phase signal that detects rapidly consist of.That is, can utilize optical switch element, utilize ground wire that the formation of the electric current between the mutually different power supplys is cut off, thus the protection internal components.That is, optical switch element only by the light receiving and transmitting signal, does not have electric current to pass through between input stage and the output stage between input stage and output stage.That is, via optical insulation, can protect internal components.
Control part 50 optionally activates according to the control of power failure induced signal SENSE and selects signal SEL, and comes output phase conditioning signal P_CTRL according to phase detection signal P_DET.Control part can be by consisting of with general microcontroller.
The second AC power generating unit 60 is according to the control of phase adjustment signal P_CTRL, the phase place of proofreading and correct the second AC power AC2.That is, the second AC power generating unit 60 generates the phase place of the second AC power AC2 in the mode identical with the phase place of the first AC power AC1.As a reference, the second AC power generating unit 60 can utilize the direct current power that will store in the rechargeable battery to be converted to the formations such as device of alternating electromotive force.
Selection portion 70 is exported among the first AC power AC1 and the second AC power AC2 any one according to the control of selecting signal SEL.That is, selection portion 70 is not in the situation that occur to have a power failure, and the first AC power AC1 output that will apply from the outside is as output AC power source AC; And in the situation that occured to have a power failure, the second AC power AC2 output that inside is generated is as output AC power source AC.At this moment, the phase place of the second AC power AC2 is identical with the phase place of the first AC power AC1, can guarantee to utilize the stability of the device of output AC power source AC operation.
Fig. 2 a is the structure chart according to the optical phase test section of Fig. 1 of first embodiment of the invention, and Fig. 2 b is the structure chart according to the optical phase test section of Fig. 1 of second embodiment of the invention.
With reference to Fig. 2 a and Fig. 2 b, optical phase test section 30 by the optical switch element 31 with optical insulation function, can determine detected phase size resistance section R1 and react rapidly and the pull down resistor R2 that exports the phase signal that detects consists of.As for optical switch element 31, receive the second internal electric source AC1_2 that applies via first input end 1, between the ground voltage terminal AGND of the second input 2 and the second input, be connected the first resistance R 1, receive the supply voltage VDD that applies via the first output 4, and between the ground voltage terminal DGND of the second output 3 and the second output, be connected the second resistance R 2.The optical switch element 31 of Fig. 2 a is made of photoelectrical coupler (Photo Coupler), and the optical switch element 31 of Fig. 2 b is made of photoelectricity MOS (Photo MOS), can utilize various optical switch elements according to different embodiment.
In optical switch element 31, when the second internal electric source AC1_2 reaches target voltage level or when higher, is electrically connected between the first output 4 and the second output 3, and from the second output 3 output phase detection signals (P_DET).That is, when according to the second internal electric source AC1_2 and the first resistance R 1, when the electric current between first input end 1 and the second input 2 meets or exceeds certain level, be electrically connected between the first output 4 and the second output 3, phase detection signal P_DET becomes high level.At this moment, when the voltage of the second internal electric source AC1_2 reached particular level, phase detection signal P_DET became high level, therefore can detect the specific phase place of the second internal electric source AC1_2.
As a reference, used in the present embodiment pull down resistor (R2 of Fig. 2 a), but according to different embodiment, also can use and be connected to the pull-up resistor that is connected between power voltage terminal VDD and the first output 4, when the electric current between first input end 1 and the second input 2 met or exceeded certain level, phase detection signal P_DET became low level.At this moment, from the first output 4 output phase detection signal P_DET.
On the other hand, when regulating the resistance value of the first resistance R 1, the electric current between first input end 1 and the second input 2 can be regulated, and then the moment of high level can be control phase detection signal P_DET become.That is, can regulate the phase place of the second internal electric source AC1_2 that needs detection.
Fig. 2 c is the structure chart according to the optical phase test section of Fig. 1 of third embodiment of the invention.In the optical phase test section of Fig. 2 c, the first resistance R 1_1, the R1_2 and the R1_3 that utilize a plurality of optical switch element 31_1,31_2 and 31_3 and have respectively different resistance values) generate a plurality of phase detection signal P_DET_HIGH, P_DET_CENTER and P_DET_LOW.That is, the optical phase test section can detect the mutual different phase place of the second internal electric source AC1_2, and exports and offer control part 50 as a plurality of phase detection signal P_DET_HIGH, P_DET_CENTER and P_DET_LOW.
As a result, the second AC power generating unit 60 can so that the phase place of the second AC power AC2 mode identical with the phase place of the first AC power AC1 more critically regulate.
Fig. 3 a is the structure chart according to the power failure induction part of first embodiment of the invention, and Fig. 3 b is the structure chart according to the power failure induction part of second embodiment of the invention.
With reference to Fig. 3 a and 3b, power failure induction part 40 consists of by receiving the second internal electric source AC1_2 and generating the rectifier 41 of DC power supply and detect the optical switch element 42 whether DC power supply meet or exceed target level and export power failure induced signal SENSE.
In the present embodiment, rectifier 41 is made of from the signal of described a plurality of diode D1, D2, D3 and D4 output and the capacitor C1 that exports as DC power supply a plurality of diode D1, D2, D3 and the D4 that form bridge rectifier and storage.
In Fig. 3 a, in the situation that occur to have a power failure, be filled with the DC power supply of certain level among the capacitor C1, therefore the voltage level from the power failure induced signal SENSE of the output output of optical switch element 42 is low level.In the situation that occured to have a power failure, the direct current power discharge that stores among the capacitor C1 becomes high level from the voltage level of the power failure induced signal SENSE of the output output of optical switch element 42.
On the other hand, in Fig. 3 b, in the situation that occur to have a power failure, store the DC power supply of certain level among the capacitor C1, therefore the voltage level from the power failure induced signal SENSE of the output output of optical switch element 42 is high level.In the situation that occured to have a power failure, the direct current power discharge that stores among the capacitor C1 becomes low level from the voltage level of the power failure induced signal SENSE of the output output of optical switch element 42.
That is, Fig. 3 a utilizes pull-up resistor to export the embodiment of power failure induced signal SENSE; Fig. 3 b utilizes pull down resistor to export the embodiment of power failure induced signal SENSE.
The alternating voltage phase locking circuit of embodiments of the invention can reduce the number of the device that consists of the alternating voltage phase locking circuit, reduces the complexity of circuit, and then reduces the cost of circuit.In addition, can reduce the amount of calculation of MCU (Micro Controller Unit, microcontroller), and then reduce the burden of MCU.In addition, by introducing optical switch element, utilize MCU receiving phase detection signal, can prevent the external AC power supply with for the short circuit between the internal DC power sources of the operation of MCU etc.
As mentioned above, for the general technical staff of the technical field of the invention, in the situation that do not change technological thought of the present invention or essential feature, can implement with other concrete forms.Therefore, above-described embodiment is illustration only in all respects, and the present invention is not limited in above-described embodiment.Scope of the present invention is not limited only to above-mentioned detailed description, scope of the present invention will limit by appending claims, the meaning of appended claim and scope, with and equivalent concepts all changes or the deformation form of deriving all should be considered as scope of the present invention.
Claims (16)
1. alternating voltage phase locking circuit comprises:
The optical phase test section, described optical phase test section detects phase place and the output phase detection signal of the first AC power that applies from the outside;
Whether power failure induction part, described power failure induction part detect described the first AC power and have a power failure and export the power failure induced signal;
Control part, described control part optionally activates the selection signal according to the control of described power failure induced signal, and comes the output phase conditioning signal according to the control of described phase detection signal;
The second AC power generating unit, described the second AC power generating unit generates the phase place of described the second AC power in the mode identical with the phase place of described the first AC power when regulating and exporting the phase place of the second AC power according to the control of described phase adjustment signal; And
Selection portion, described selection portion are exported any one in described the first AC power and described the second AC power according to the control of described selection signal.
2. alternating voltage phase locking circuit according to claim 1 also comprises:
Transformer, described transformer receive the first AC power and generate the first internal electric source; And
The variation adjusting portion, described variation adjusting portion by regulating described the first internal electric source skew and readjust size and be used as the output of the second internal electric source, and described the second internal electric source is provided to described optical phase test section and described power failure induction part.
3. alternating voltage phase locking circuit according to claim 2 is characterized in that,
Described variation adjusting portion is made of a plurality of noninverting amplifiers, skew and the big or small example of described the second internal electric source is regulated, and utilize the RC filter to abate the noise.
4. alternating voltage phase locking circuit according to claim 2 is characterized in that,
Described optical phase test section comprises optical switch element, described optical switch element receives described the second internal electric source that applies via first input end, between the ground voltage terminal of the second input and the second input, be connected with the first resistance, receive the supply voltage that applies via the first output, and between the ground voltage terminal of the second output and the second output, be connected with the second resistance; And
When described the second internal electric source meets or exceeds target voltage level, be electrically connected between described the first output and described the second output, and export described phase detection signal from described the second output.
5. alternating voltage phase locking circuit according to claim 4 is characterized in that, described optical switch element is made of photoelectrical coupler.
6. alternating voltage phase locking circuit according to claim 4 is characterized in that, described optical switch element is made of photoelectricity MOS.
7. alternating voltage phase locking circuit according to claim 2 is characterized in that,
Described power failure induction part comprises:
Rectifier, described rectifier receive described the second internal electric source and generate DC power supply; And
Optical switch element, described optical switch element detect described DC power supply and whether meet or exceed target level and export described power failure induced signal.
8. alternating voltage phase locking circuit according to claim 7 is characterized in that,
Described rectifier comprises:
A plurality of diodes, described a plurality of diodes form bridge rectifier; And
Capacitor, described capacitor stores is from the signal of described a plurality of diode outputs and as described DC power supply output.
9. alternating voltage phase locking circuit comprises:
Optical phase test section, described optical phase test section detect mutually different phase places and as a plurality of phase detection signals outputs when detecting the phase place of the first AC power apply from the outside;
Whether power failure induction part, described power failure induction part detect described the first AC power and have a power failure and export the power failure induced signal;
Control part, described control part optionally activates the selection signal according to the control of described power failure induced signal, and comes the output phase conditioning signal according to the control of described a plurality of phase detection signals;
The second AC power generating unit, described the second AC power generating unit generates the phase place of described the second AC power in the mode identical with the phase place of described the first AC power when regulating and exporting the phase place of the second AC power according to the control of described phase adjustment signal; And
Selection portion, described selection portion are exported any one in described the first AC power and described the second AC power according to the control of described selection signal.
10. alternating voltage phase locking circuit according to claim 9 also comprises:
Transformer, described transformer receive described the first AC power and generate the first internal electric source;
The variation adjusting portion, described variation adjusting portion by regulating described the first internal electric source skew and readjust size and as the output of the second internal electric source, and described the second internal electric source is provided to described optical phase test section and described power failure induction part.
11. alternating voltage phase locking circuit according to claim 10 is characterized in that,
Described variation adjusting portion is made of a plurality of noninverting amplifiers, skew and the size of described the second internal electric source is regulated, and utilize the RC filter to abate the noise.
12. alternating voltage phase locking circuit according to claim 10 is characterized in that,
Described optical phase test section is made of a plurality of optical switch elements;
Described a plurality of optical switch element is constituted as respectively and receives described the second internal electric source that applies via first input end, between the ground voltage terminal of the second input and the second input, be connected with the first resistance, receive the supply voltage that applies via first input end, and between the ground voltage terminal of the second input and the second input, be connected with the second resistance; And
The resistance value of described the first resistance that each described a plurality of optical switch element comprises is set to difference.
13. alternating voltage phase locking circuit according to claim 12 is characterized in that described optical switch element is made of photoelectrical coupler.
14. alternating voltage phase locking circuit according to claim 12 is characterized in that described optical switch element is made of photoelectricity MOS.
15. alternating voltage phase locking circuit according to claim 10 is characterized in that,
Described power failure induction part comprises:
Rectifier, described rectifier receive described the second internal electric source and generate DC power supply; And
Optical switch element, described optical switch element detect described DC power supply and whether meet or exceed target level and export described power failure induced signal.
16. alternating voltage phase locking circuit according to claim 15, wherein,
Described rectifier comprises:
A plurality of diodes, described a plurality of diodes form bridge rectifier; And
Capacitor, described capacitor stores is from the signal of described a plurality of diode outputs and as described DC power supply output.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20110063671 | 2011-06-29 | ||
| KR10-2011-0063671 | 2011-06-29 | ||
| KR10-2011-0086002 | 2011-08-26 | ||
| KR1020110086002A KR101414733B1 (en) | 2011-06-29 | 2011-08-26 | Phase synchronization circuit for ac voltage |
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| Publication Number | Publication Date |
|---|---|
| CN102856907A true CN102856907A (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102341923A Pending CN102856907A (en) | 2011-06-29 | 2012-06-29 | Alternating voltage phase synchronization circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08126228A (en) * | 1994-10-19 | 1996-05-17 | Hitachi Ltd | Power supply |
| KR20080079042A (en) * | 2007-02-26 | 2008-08-29 | (주)미광-케이아이 | Supply apparatus of an emergency power source |
| CN101291073A (en) * | 2007-04-17 | 2008-10-22 | 台达电子工业股份有限公司 | Uninterrupted power source and control method thereof |
| CN101599660A (en) * | 2008-06-06 | 2009-12-09 | 深圳市海洋王照明科技股份有限公司 | A kind of alternating current is changing method and system at random |
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2012
- 2012-06-29 CN CN2012102341923A patent/CN102856907A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08126228A (en) * | 1994-10-19 | 1996-05-17 | Hitachi Ltd | Power supply |
| KR20080079042A (en) * | 2007-02-26 | 2008-08-29 | (주)미광-케이아이 | Supply apparatus of an emergency power source |
| CN101291073A (en) * | 2007-04-17 | 2008-10-22 | 台达电子工业股份有限公司 | Uninterrupted power source and control method thereof |
| CN101599660A (en) * | 2008-06-06 | 2009-12-09 | 深圳市海洋王照明科技股份有限公司 | A kind of alternating current is changing method and system at random |
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Application publication date: 20130102 |