CN105425055B - Input phase failure detection device and method and polyphase ac input electronic equipment - Google Patents
Input phase failure detection device and method and polyphase ac input electronic equipment Download PDFInfo
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Abstract
The present invention provides a kind of input phase failure detection device, input phase failure detection method and polyphase ac to input electronic equipment.Input phase failure detection device includes：Rectification and filter unit, for carrying out rectification and filtering to polyphase ac input voltage, obtain d. c. voltage signal；DC voltage sampling unit, for being sampled to the d. c. voltage signal of rectification and filter unit output, obtains sampling d. c. voltage signal；Input phase failure identifying unit, sampling d. c. voltage signal for being exported to DC voltage sampling unit carries out Fast Fourier Transform (FFT) FFT computings, to extract the normal frequency component of d. c. voltage signal and improper frequency content, and by the way that the normal frequency component is compared to determine whether input phase failure with improper frequency content.Without additional forceful electric power detection circuit, input phase failure can be detected in light load or zero load, and can reliably working when input voltage fluctuation.
Description
Technical field
The present invention relates to input phase failure detection technique, is detected more particularly, to input phase failure detection device, input phase failure
Method and polyphase ac input electronic equipment.
Background technology
For the electronic equipment inputted using polyphase ac, input phase failure detection is a kind of basic frequency converter work(
Energy.Common input phase failure detection method is by directly being measured to polyphase ac input voltage, or by additional
Rectified voltage is converted into pulse signal or analog signal by rectification circuit, then is sent coherent signal to processing by isolation optocoupler
Device, logical operation and judgement are carried out by processor.But this method needs additional input voltage forceful electric power detection circuit, brings
The problems such as insulating space, cost, circuit reliability.In addition, in some electronic equipments inputted using polyphase ac, using
Some main circuit rectification circuits, by the wave amplitude size of direct current embossing or the holding for DC voltage ripple that detect rectification circuit
The continuous dullness time is to determine whether occur input phase failure.For example, in patent document CN102778612A, lacked for detecting input
The device of phase includes：Power input unit, it applies three-phase alternating voltage；Rectification unit, it is to by the power input unit
The alternating voltage of application carries out rectification；Filter unit, it carries out rectified voltage bandpass filtering and according to filtered
Voltage calculates the amplitude of ripple voltage；And input phase failure detection unit, it determines whether according to the amplitude of ripple voltage
Through there occurs input phase failure, specifically, in the case where the amplitude of ripple voltage is less than predetermined value, input does not occur and lacks for judgement
Phase, in the case where the amplitude of ripple voltage is more than predetermined value, judgement has occurred and that input phase failure.In addition, in patent document
A kind of method for detecting input phase failure of three-phase input device is disclosed in CN102419400, the three-phase input to three-phase input equipment
Voltage obtains DC bus-bar voltage after carrying out rectifying and wave-filtering, and DC bus-bar voltage is sampled according to certain time interval,
When occurring continuous n dull sampled voltage in sample voltage value, an input phase failure is recorded, is detected in time T
When input phase failure number is more than phase shortage setting value, it is judged as input phase failure, is otherwise judged as input not phase shortage, in sample voltage value
There is no during n dull sample voltage value of arbitrary continuation, it is judged as input not phase shortage.But above-mentioned method for detecting open phase leads to
Input phase failure, polyphase ac input electronics often only can be just detected when polyphase ac inputs electronic device works to high load
Equipment works as polyphase ac and inputs electronic device works in input voltage there are the risk with heavy duty damage during single-phase input
There is mistake and examine out of order risk in unstable, input imbalance, the hunting of load or loading and unloading transient state when state.
The content of the invention
The technical problem to be solved in the present invention
The present invention is intended to provide a kind of input phase failure detection device, input phase failure detection method and polyphase ac input electricity
Sub- equipment, without additional input voltage forceful electric power detection circuit, can input the gently load or empty of electronic equipment band in polyphase ac
Input phase failure is detected during load, and under input voltage fluctuation, input imbalance, the hunting of load and loading and unloading transient state all
Can reliably working.
Solve the technical solution of technical problem
The present invention provides a kind of input phase failure detection device, including：Rectification and filter unit, for defeated to polyphase ac
Enter voltage and carry out rectification and filtering, obtain d. c. voltage signal；DC voltage sampling unit, for defeated to rectification and filter unit
The d. c. voltage signal gone out is sampled, and obtains sampling d. c. voltage signal；Input phase failure identifying unit, for DC voltage
The sampling d. c. voltage signal of sampling unit output carries out Fast Fourier Transform (FFT) (FFT) computing, to extract d. c. voltage signal
Normal frequency component and improper frequency content, and by the way that the normal frequency component is compared with improper frequency content
Pair to determine whether input phase failure.
Preferably, input phase failure identifying unit can include：Extraction module, the sampling to the output of DC voltage sampling unit
D. c. voltage signal carries out FFT computings, to extract the fundamental frequency signal amplitude of the DC voltage ripple of first frequency work respectively
For normal frequency component, and extract the fundamental frequency signal amplitude of the DC voltage ripple of second frequency as improper frequency into
Point；Comparison module, the direct current by the fundamental frequency signal amplitude of the DC voltage ripple of second frequency relative to first frequency
The ratio of the fundamental frequency signal amplitude of ripple is embossed compared with first threshold, and by the base of the DC voltage ripple of second frequency
Frequency signal amplitude relative to the fundamental frequency signal amplitude of the DC voltage ripple of first frequency difference and second threshold
Compare；Accumulator module, when second frequency DC voltage ripple fundamental frequency signal amplitude relative to the straight of first frequency
The ratio for flowing the fundamental frequency signal amplitude of voltage ripple is more than the base of first threshold and the DC voltage ripple of second frequency
Frequency signal amplitude is more than the second threshold relative to the difference of the fundamental frequency signal amplitude of the DC voltage ripple of first frequency
During value, the number of input phase failure event is added 1；Determination module, when time of input phase failure event in accumulator module in the scheduled time
When number reaches pre-determined number, judge input phase failure occurs.
Preferably, first threshold can be that second threshold can come definite according to the difference of first frequency and second frequency
To wish the load of trigger protection come definite when being according to voltage detecting precision and phase shortage.For example, first threshold can be with
Between 3 and 4, second threshold can be not less than 2 volts.In the case where 50Hz power supplys are powered, first frequency can be
300Hz, second frequency can be 100Hz.Within the signal period of normal frequency component, the sampling number of d. c. voltage signal is not
Less than 3, within the signal period of improper frequency content, the sampling number of d. c. voltage signal is not less than 6.Polyphase ac inputs
Voltage can be three-phase alternating current input voltage.
Present invention also offers a kind of polyphase ac to input electronic equipment, including above-mentioned input phase failure detection device.It is described
Polyphase ac input electronic equipment can be frequency converter.
Present invention also offers a kind of input phase failure detection method, including：To polyphase ac input voltage carry out rectification and
Filtering, obtains d. c. voltage signal；D. c. voltage signal is sampled, obtains sampling d. c. voltage signal；To sampling direct current
Voltage signal carry out FFT computings, to extract the normal frequency component of d. c. voltage signal and improper frequency content, and pass through by
The normal frequency component is compared with improper frequency content to determine whether input phase failure.
Preferably, FFT computings are carried out to sampling d. c. voltage signal, to extract the normal frequency component of d. c. voltage signal
With improper frequency content, and by the way that the normal frequency component is compared to determine whether defeated with improper frequency content
Entering phase shortage can include：FFT computings are carried out to sampling d. c. voltage signal, to extract the DC voltage ripple of first frequency respectively
Fundamental frequency signal amplitude as normal frequency component, and extract the fundamental frequency signal of the DC voltage ripple of second frequency
Amplitude is as improper frequency content；By the fundamental frequency signal amplitude of the DC voltage ripple of second frequency relative to the first frequency
The ratio of the fundamental frequency signal amplitude of the DC voltage ripple of rate is compared with first threshold, and by the direct current of second frequency
The fundamental frequency signal amplitude of ripple is embossed relative to the difference of the fundamental frequency signal amplitude of the DC voltage ripple of first frequency
Compared with second threshold；When second frequency DC voltage ripple fundamental frequency signal amplitude relative to the straight of first frequency
The ratio for flowing the fundamental frequency signal amplitude of voltage ripple is more than the base of first threshold and the DC voltage ripple of second frequency
Frequency signal amplitude is more than the second threshold relative to the difference of the fundamental frequency signal amplitude of the DC voltage ripple of first frequency
During value, the number of input phase failure event is added 1；When the number of input phase failure event in the scheduled time reaches pre-determined number, sentence
It is disconnected that input phase failure occurs.
Preferably, first threshold can be that second threshold can come definite according to the difference of first frequency and second frequency
To wish the load of trigger protection come definite when being according to voltage detecting precision and phase shortage.For example, first threshold can be with
Between 3 and 4, second threshold can be not less than 2 volts.In the case where 50Hz power supplys are powered, first frequency can be
300Hz, second frequency can be 100Hz.Within the signal period of normal frequency component, the sampling number of d. c. voltage signal is not
Less than 3, within the signal period of improper frequency content, the sampling number of d. c. voltage signal is not less than 6.Polyphase ac inputs
Voltage can be three-phase alternating current input voltage.
Beneficial effects of the present invention
Input phase failure detection device, input phase failure detection method and polyphase ac input electronic equipment proposed by the present invention are extremely
Have the following advantages that less：
1st, without additional hardware detecting circuit, particularly input voltage forceful electric power detection circuit, thus save space and
Cost and the reliability with higher；
2nd, input phase failure can be detected when polyphase ac inputs the light load of electronic equipment band or zero load, so that preferably
Protect polyphase ac input electronic equipment；And
3rd, when polyphase ac input electronic device works input voltage is unstable, input is uneven, the hunting of load or
Loading and unloading transient state avoids mistake and examines out of order risk when state.
Brief description of the drawings
By reading the described in detail below of the embodiment of the present invention and the present invention will be best understood by reference to the figures, its
In：
Fig. 1 shows the structure diagram of input phase failure detection device according to embodiments of the present invention.
Fig. 2 shows the structure of the input phase failure identifying unit in input phase failure detection device according to embodiments of the present invention
Block diagram.
Fig. 3 shows the structure diagram of frequency converter according to embodiments of the present invention.
Fig. 4 shows the flow chart of input phase failure detection method according to embodiments of the present invention.
Embodiment
Hereinafter, the preferred embodiment of the present invention is described with reference to the accompanying drawings.Through attached drawing, same reference numbers are used to indicate
Similar elements.
Fig. 1 shows the structure diagram of input phase failure detection device according to embodiments of the present invention.It is provided by the invention defeated
Enter the input phase failure detection that pile defection device 100 can be used for polyphase ac input electronic equipment.For example, polyphase ac inputs
Electronic equipment can be frequency converter, servo-driver, UPS etc..As shown in Figure 1, input phase failure detection device 100 can include it is whole
Stream and filter unit 101, DC voltage sampling unit 102 and input phase failure identifying unit 103.
Rectification and filter unit 101 carry out rectification and filtering to polyphase ac input voltage, obtain d. c. voltage signal.It is more
Cross streams input voltage can be three-phase alternating current input voltage.
The d. c. voltage signal that DC voltage sampling unit 102 exports rectification and filter unit 101 samples, and obtains
Sample d. c. voltage signal.In the present embodiment, within the signal period of normal frequency component, the sampled point of d. c. voltage signal
Number is not less than 3, and within the signal period of improper frequency content, the sampling number of d. c. voltage signal is not less than 6.
The sampling d. c. voltage signal that input phase failure identifying unit 103 exports DC voltage sampling unit 102 carries out FFT
Computing, to extract the normal frequency component of d. c. voltage signal and improper frequency content, and by by the normal frequency into
Divide and be compared with improper frequency content to determine whether input phase failure.Input phase failure identifying unit 103 can be by microprocessor
Device is realized.Received signal can be first docked before microprocessor is handled and carries out A/D conversions.
In the present embodiment, DC voltage sampling unit 102 and input phase failure identifying unit 103 can be defeated by polyphase ac
Enter DC voltage detection circuit and the microprocessor of electronic equipment itself to realize.
Fig. 2 shows the input phase failure identifying unit 103 in input phase failure detection device according to embodiments of the present invention
Structure diagram.As shown in Fig. 2, input phase failure identifying unit 103 can include extraction module 1031, comparison module 1032, add up
Module 1033 and determination module 1034.
The sampling d. c. voltage signal that extraction module 1031 exports DC voltage sampling unit carries out FFT computings, to divide
The fundamental frequency signal amplitude of the DC voltage ripple of first frequency is indescribably taken as normal frequency component, and extracts second frequency
DC voltage ripple fundamental frequency signal amplitude as improper frequency content.In the case where 50Hz power supplys are powered, the
One frequency can be 300Hz, and second frequency can be 100Hz.Herein, the fundamental frequency signal of so-called DC voltage ripple
Amplitude can also be replaced by other numerical value such as virtual value with amplitude in proportion.
Comparison module 1032 is by the fundamental frequency signal amplitude U1 of the DC voltage ripple of second frequency relative to the first frequency
The ratio U1/U0 of the fundamental frequency signal amplitude U0 of the DC voltage ripple of rate is compared with first threshold K, and by second frequency
DC voltage ripple fundamental frequency signal amplitude U1 relative to the DC voltage ripple of first frequency fundamental frequency signal
The difference U1-U0 of amplitude U0 is compared with second threshold Y.Preferably, can according to the difference of first frequency and second frequency come
Determine first threshold K, according to voltage detecting precision and phase shortage when wishes the load of trigger protection to determine second threshold Y.
For example, voltage detecting precision is poorer, or wishes that the load of trigger protection is bigger during phase shortage, then second threshold Y is bigger.In this reality
Apply in example, first threshold K can be between 3 and 4, and second threshold Y can be not less than 2 volts.
Accumulator module 1033 is when the fundamental frequency signal amplitude U1 of the DC voltage ripple of second frequency is relative to the first frequency
The ratio U1/U0 of the fundamental frequency signal amplitude U0 of the DC voltage ripple of rate is more than the straight of first threshold K and second frequency
The fundamental frequency signal amplitude U1 of voltage ripple is flowed relative to the fundamental frequency signal amplitude of the DC voltage ripple of first frequency
When the difference U1-U0 of U0 is more than second threshold Y, the number of input phase failure event is added 1.
Determination module 1034 reaches pre-determined number when the number of input phase failure event in accumulator module 1033 in scheduled time T
During N, judge input phase failure occurs.After judging input phase failure occurs, corresponding control and protection can be taken, and can be with
Alarm.In the present embodiment, time T can be 500 milliseconds, and N can be 50 times.If realizing the susceptibility of higher, N can be with
For 25 times.
Fig. 3 shows the structure diagram of frequency converter 300 according to embodiments of the present invention.Frequency converter 300 contains the defeated of Fig. 1
Enter pile defection device 100.As shown in figure 3, frequency converter 300 is except including rectification and filter unit 101, DC voltage sampling list
Outside member 102 and input phase failure identifying unit 103, inversion unit 301 can also be included.On rectification and filter unit 101, straight
Voltage sampling unit 102 and input phase failure identifying unit 103 are flowed, is above described in detail with reference to figure 1 and Fig. 2, herein
Repeat no more.In the present embodiment, how inversion unit 301 will determine according to the judging result of input phase failure identifying unit 103
The d. c. voltage signal that rectification and filter unit 101 export is reverse into ac voltage signal and exports.For example, input phase failure judges
Unit 103 is judging that, there occurs during input phase failure, control and protection signal, inversion unit 301 can be sent to inversion unit 301
It can stop rectification being reverse into the d. c. voltage signal that filter unit 101 exports according to the control and protection signal and exchange
Voltage signal simultaneously exports or limits volume output.Preferably, input phase failure identifying unit 103 is judging that there occurs during input phase failure
It can also alarm.
Fig. 4 shows the flow chart of input phase failure detection method according to embodiments of the present invention.Input provided by the invention
Method for detecting open phase can be used in polyphase ac input electronic equipment.For example, can be in polyphase ac input electronic equipment
Frequency converter, servo-driver, UPS etc..Input phase failure detection method can include：To polyphase ac input voltage carry out rectification and
Filtering, obtains d. c. voltage signal；D. c. voltage signal is sampled, obtains sampling d. c. voltage signal；And to sampling
D. c. voltage signal carries out FFT computings, to extract the normal frequency component of d. c. voltage signal and improper frequency content, and leads to
Cross and the normal frequency component is compared to determine whether input phase failure with improper frequency content.
Input phase failure detection method provided by the invention is described in detail below with reference to Fig. 4.
In step 401, rectification and filtering are carried out to polyphase ac input voltage, obtain d. c. voltage signal.Polyphase ac
Input voltage can be three-phase alternating current input voltage.
In step 402, d. c. voltage signal is sampled, obtains sampling d. c. voltage signal.In the present embodiment, exist
It can be performed after sampling and filter out noisy operation, then judge whether sampling number is more than predetermined numerical value, if it is, into
Row to step 403, otherwise return to step 402 continues to sample.Within the signal period of normal frequency component, d. c. voltage signal
Sampling number is not less than 3, and within the signal period of improper frequency content, the sampling number of d. c. voltage signal is not less than 6.
In step 403, FFT computings are carried out to sampling d. c. voltage signal, to extract the DC voltage of first frequency respectively
The fundamental frequency signal amplitude U0 of ripple extracts the fundamental wave frequency of the DC voltage ripple of second frequency as normal frequency component
Rate signal amplitude U1 is as improper frequency content.In the case where 50Hz power supplys are powered, first frequency can be 300Hz, the
Two frequencies can be 100Hz.
In step 404, by the fundamental frequency signal amplitude U1 of the DC voltage ripple of second frequency relative to first frequency
DC voltage ripple fundamental frequency signal amplitude U0 ratio U1/U0 compared with first threshold K, and by second frequency
The fundamental frequency signal amplitude U1 of DC voltage ripple relative to the DC voltage ripple of first frequency fundamental frequency signal width
The difference U1-U0 of value U0 is compared with second threshold Y, if U1/U0 ＞ K and U1-U0 ＞ Y, carries out to step 405, no
Then carry out to step 406.Preferably, first threshold K can be determined according to the difference of first frequency and second frequency, according to electricity
Pressure accuracy of detection and when phase shortage, wish the load of trigger protection to determine second threshold Y.For example, voltage detecting precision is got over
Difference, or wish that the load of trigger protection is bigger during phase shortage, then second threshold Y is bigger.In the present embodiment, first threshold K can
With between 3 and 4, second threshold Y can be not less than 2 volts.
In step 405, the number of input phase failure event is added 1.
In step 406, judge whether the number of input phase failure event in scheduled time T reaches pre-determined number N, if so,
Then think input phase failure occurs, perform corresponding control and protection and alarm, otherwise return to step 402.In the present embodiment,
Time T can be 500 milliseconds, and N can be 50 times.If realizing the susceptibility of higher, N can be 25 times.
Input phase failure detection device, input phase failure detection method and polyphase ac input electronic equipment profit provided by the invention
Existing d. c. voltage signal in electronic equipment is inputted with polyphase ac, is extracted using fft algorithm in d. c. voltage signal just
Normal frequency content and improper frequency content, are lacked by both frequency contents being compared to determine whether input occurs
Phase, therefore the forceful electric power detection circuit without adding, save space and cost and the reliability with higher, can be in multiphase
Exchange input electronic equipment band gently loads or detects input phase failure when unloaded, preferably to protect polyphase ac input electronics to set
It is standby, and when polyphase ac input electronic device works are input voltage is unstable, input is uneven, the hunting of load or loading
Unloading transient state remains able to work normally when state, avoids mistake and examines out of order risk.
Although above by preferred embodiment, the present invention is described, and the invention is not limited in above-mentioned specific
Embodiment, under without departing substantially from spirit of the invention and its real situation, those of ordinary skill in the art can make respectively according to the present invention
Kind is corresponding to be changed and deforms, and these corresponding changes and deformation should all belong within scope of the appended claims of the present invention.
Claims (14)
1. a kind of input phase failure detection device, including：
Rectification and filter unit, for carrying out rectification and filtering to polyphase ac input voltage, obtain d. c. voltage signal；
DC voltage sampling unit, for being sampled to the d. c. voltage signal of rectification and filter unit output, is sampled
D. c. voltage signal；
Input phase failure identifying unit, the sampling d. c. voltage signal for being exported to DC voltage sampling unit are carried out in quick Fu
Leaf transformation FFT computings, to extract the normal frequency component of d. c. voltage signal and improper frequency content, and by by it is described just
Normal frequency content is compared with improper frequency content to determine whether input phase failure,
Wherein, the input phase failure identifying unit includes：
Extraction module, carries out FFT computings, to extract the respectively to the sampling d. c. voltage signal of DC voltage sampling unit output
The fundamental frequency signal amplitude of the DC voltage ripple of one frequency extracts the direct current of second frequency as normal frequency component
The fundamental frequency signal amplitude of ripple is embossed as improper frequency content；
Comparison module, the direct current by the fundamental frequency signal amplitude of the DC voltage ripple of second frequency relative to first frequency
The ratio of the fundamental frequency signal amplitude of ripple is embossed compared with first threshold, and by the base of the DC voltage ripple of second frequency
Frequency signal amplitude relative to the fundamental frequency signal amplitude of the DC voltage ripple of first frequency difference and second threshold
Compare；
Accumulator module, when second frequency DC voltage ripple fundamental frequency signal amplitude relative to first frequency direct current
The ratio for embossing the fundamental frequency signal amplitude of ripple is more than the fundamental wave frequency of first threshold and the DC voltage ripple of second frequency
When rate signal amplitude is more than second threshold relative to the difference of the fundamental frequency signal amplitude of the DC voltage ripple of first frequency,
The number of input phase failure event is added 1；
Determination module, when the number of input phase failure event in accumulator module in the scheduled time reaches pre-determined number, judges to occur
Input phase failure.
2. input phase failure detection device according to claim 1, wherein, the first threshold is according to first frequency and
The difference of two frequencies is come definite, and the second threshold wishes the load of trigger protection when being according to voltage detecting precision and phase shortage
Size is come definite.
3. input phase failure detection device according to claim 1, wherein, the first threshold is between 3 and 4, and described
Two threshold values are not less than 2 volts.
4. input phase failure detection device according to claim 1, wherein, in the case where 50Hz power supplys are powered, the first frequency
Rate is 300Hz, second frequency 100Hz.
5. input phase failure detection device according to claim 1, wherein, within the signal period of normal frequency component, directly
The sampling number for flowing voltage signal is not less than 3, within the signal period of improper frequency content, the sampled point of d. c. voltage signal
Number is not less than 6.
6. input phase failure detection device according to claim 1, wherein, the polyphase ac input voltage is three-phase alternating current
Input voltage.
7. a kind of polyphase ac inputs electronic equipment, including input phase failure detection device according to claim 1.
8. polyphase ac according to claim 7 inputs electronic equipment, wherein, the polyphase ac input electronic equipment is
Frequency converter.
9. a kind of input phase failure detection method, including：
Rectification and filtering are carried out to polyphase ac input voltage, obtain d. c. voltage signal；
D. c. voltage signal is sampled, obtains sampling d. c. voltage signal；
Fast Fourier Transform (FFT) FFT computings are carried out to sampling d. c. voltage signal, to extract the normal frequency of d. c. voltage signal
Component and improper frequency content, and judge to be by the way that the normal frequency component is compared with improper frequency content
No input phase failure,
Wherein, Fast Fourier Transform (FFT) FFT computings are carried out to sampling d. c. voltage signal, to extract the normal of d. c. voltage signal
Frequency content and improper frequency content, and sentenced by the way that the normal frequency component is compared with improper frequency content
It is disconnected that whether input phase failure includes：
FFT computings are carried out to sampling d. c. voltage signal, to extract the fundamental frequency of the DC voltage ripple of first frequency respectively
Signal amplitude extracts the fundamental frequency signal amplitude of the DC voltage ripple of second frequency as non-as normal frequency component
Normal frequency component；
By the fundamental frequency signal amplitude of the DC voltage ripple of second frequency relative to the DC voltage ripple of first frequency
The ratio of fundamental frequency signal amplitude is believed compared with first threshold, and by the fundamental frequency of the DC voltage ripple of second frequency
Number amplitude is relative to the difference of the fundamental frequency signal amplitude of the DC voltage ripple of first frequency compared with second threshold；
When second frequency DC voltage ripple fundamental frequency signal amplitude relative to the DC voltage ripple of first frequency
The ratio of fundamental frequency signal amplitude is more than the fundamental frequency signal width of first threshold and the DC voltage ripple of second frequency
When value is more than second threshold relative to the difference of the fundamental frequency signal amplitude of the DC voltage ripple of first frequency, input is lacked
The number of phase event adds 1；
When the number of input phase failure event in the scheduled time reaches pre-determined number, judge input phase failure occurs.
10. input phase failure detection method according to claim 9, wherein, the first threshold be according to first frequency with
The difference of second frequency is come definite, and the second threshold wishes the negative of trigger protection when being according to voltage detecting precision and phase shortage
Load size is come definite.
11. input phase failure detection method according to claim 9, wherein, the first threshold is between 3 and 4, and described
Two threshold values are not less than 2 volts.
12. input phase failure detection method according to claim 9, wherein, in the case where 50Hz power supplys are powered, the first frequency
Rate is 300Hz, second frequency 100Hz.
13. input phase failure detection method according to claim 9, wherein, within the signal period of normal frequency component, directly
The sampling number for flowing voltage signal is not less than 3, within the signal period of improper frequency content, the sampled point of d. c. voltage signal
Number is not less than 6.
14. input phase failure detection method according to claim 9, wherein, the polyphase ac input voltage is three intersecting
Flow input voltage.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108196136B (en) * | 2017-12-14 | 2020-02-07 | 青岛海信日立空调系统有限公司 | Three-phase electricity detection method and device and air conditioner outdoor unit |
| CN108115251B (en) * | 2017-12-28 | 2023-10-03 | 上海通用重工集团有限公司 | No-load judging method and circuit for arc welder |
| CN109194245B (en) * | 2018-11-16 | 2023-11-10 | 广东科伺智能科技有限公司 | Servo driver with input open-phase detection function and detection method thereof |
| JP6887057B1 (en) * | 2019-07-26 | 2021-06-16 | 東芝三菱電機産業システム株式会社 | Power converter and open phase detector |
| CN110441712A (en) * | 2019-09-10 | 2019-11-12 | 深圳市英威腾电气股份有限公司 | Method for detecting abnormality, system and relevant device are inputted in a kind of rectified three-phase circuit |
| CN112067912B (en) * | 2020-09-10 | 2023-08-11 | 上海辛格林纳新时达电机有限公司 | Open-phase detection method, electronic equipment and storage medium |
| CN113740651B (en) * | 2021-09-06 | 2024-06-04 | 苏州溯驭技术有限公司 | Quality detection method suitable for three-phase frequency converter input power grid |
| CN116626405B (en) * | 2023-07-20 | 2023-11-28 | 深圳鹏城新能科技有限公司 | Open-phase detection circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353851A (en) * | 2011-09-05 | 2012-02-15 | 中冶南方（武汉）自动化有限公司 | Transducer input default phase detection method based on direct-current bus voltage |
| CN102419400A (en) * | 2010-09-28 | 2012-04-18 | 深圳市英威腾电气股份有限公司 | Method for detecting input phase failure of three-phase input device |
| CN102778612A (en) * | 2011-05-13 | 2012-11-14 | Ls产电株式会社 | Apparatus for detecting input phase missing and method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006033904A (en) * | 2004-07-12 | 2006-02-02 | Matsushita Electric Ind Co Ltd | Three-phase phase interruption detector and air conditioner using it |
| JP2006180650A (en) * | 2004-12-24 | 2006-07-06 | Matsushita Electric Ind Co Ltd | Open phase detector and air conditioner using the same |
| JP5957361B2 (en) * | 2012-10-24 | 2016-07-27 | 株式会社日立産機システム | Phase loss detection method and power conversion device |
-
2014
- 2014-09-17 CN CN201410474886.3A patent/CN105425055B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419400A (en) * | 2010-09-28 | 2012-04-18 | 深圳市英威腾电气股份有限公司 | Method for detecting input phase failure of three-phase input device |
| CN102778612A (en) * | 2011-05-13 | 2012-11-14 | Ls产电株式会社 | Apparatus for detecting input phase missing and method thereof |
| CN102353851A (en) * | 2011-09-05 | 2012-02-15 | 中冶南方（武汉）自动化有限公司 | Transducer input default phase detection method based on direct-current bus voltage |
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