CN110098595A - A kind of open phases of three-phase power source anti-phase guard method and device - Google Patents
A kind of open phases of three-phase power source anti-phase guard method and device Download PDFInfo
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- CN110098595A CN110098595A CN201910422870.0A CN201910422870A CN110098595A CN 110098595 A CN110098595 A CN 110098595A CN 201910422870 A CN201910422870 A CN 201910422870A CN 110098595 A CN110098595 A CN 110098595A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/253—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for multiphase applications, e.g. phase interruption
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/34—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system
- H02H3/343—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors of a three-phase system using phase sequence analysers
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Abstract
The present invention provides a kind of open phases of three-phase power source anti-phase guard method and devices; it include: when three phase mains to be detected powers on; acquire the first electric signal of the first end output of electric-controlled plate and the second electric signal of second end output; wherein, the first electric signal and the second electric signal are the signal of the first phase current, the second phase current and third phase current of three phase mains to be detected output after electric-controlled plate rectifies；According to the first electric signal and the second electric signal determine three phase mains to be detected whether anti-phase, if so, execute S3, otherwise, execute S4；S3: exporting the first prompt information for prompting three phase mains anti-phase to be detected, executes S6；S4: according to the first electric signal and the second electric signal, determine three phase mains to be detected whether phase shortage, if so, executing S5；S5: exporting the second prompt information for prompting open phases of three-phase power source to be detected, executes S6；S6: control motor is out of service.This programme can be improved the efficiency for examining open phases of three-phase power source anti-phase to be detected.
Description
Technical field
The present invention relates to intelligent appliance art field, in particular to a kind of open phases of three-phase power source anti-phase guard method and device.
Background technique
With the development of economy, household electrical appliances have become essential product for people's lives, save many housework of people, are
Home life is made that no small contribution.
Currently, motor work cannot be made in the power ring of phase shortage especially anti-phase using the household electrical appliances of three phase mains to be detected
Otherwise border will cause the damage of motor.Therefore, it is necessary to the three-phases to be detected that unit check personnel pass through desk checking household appliance
Power supply.
As can be seen from the above description, the prior art by the three phase mains to be detected of desk checking household appliance whether phase shortage
Anti-phase, the low efficiency of inspection.
Summary of the invention
The embodiment of the invention provides a kind of open phases of three-phase power source anti-phase guard method and devices, and it is to be checked to can be improved inspection
Survey the efficiency of open phases of three-phase power source anti-phase.
In a first aspect, the embodiment of the invention provides a kind of open phases of three-phase power source anti-phase guard methods, comprising:
When three phase mains to be detected powers on,
S1: the first electric signal of the first end output of electric-controlled plate and the second electric signal of second end output are acquired, wherein institute
It is whole by the electric-controlled plate for the first phase current of the three phase mains output to be detected and the second phase current to state the first electric signal
Signal after stream, second electric signal are that the second phase current of the three phase mains output to be detected and third phase current pass through
Signal after the electric-controlled plate rectification；
S2: according to first electric signal and second electric signal, determine the three phase mains to be detected whether anti-phase,
If so, executing S3, otherwise, S4 is executed；
S3: output executes S6 for prompting the first prompt information of the three phase mains anti-phase to be detected；
S4: according to first electric signal and second electric signal, determine the three phase mains to be detected whether phase shortage,
If so, executing S5；
S5: output executes S6 for prompting the second prompt information of the open phases of three-phase power source to be detected；
S6: the motor of the control three phase mains connection to be detected is out of service.
Preferably,
Before the S2, further comprise:
First phase current of the three phase mains output normally connected according to triple line, the second phase current and third phase current
Period determines the time point when rising edge of the third electric signal of the first end output of the electric-controlled plate arrives, and described automatically controlled
The first time interval between time point when the rising edge of 4th electric signal of the second end output of plate arrives, wherein described
Third electric signal is described in the first phase current that the three phase mains that the triple line normally connects exports and the second phase current process
Signal after electric-controlled plate rectification, the 4th electric signal are the two phase electricity for the three phase mains output that the triple line normally connects
The signal of stream and third phase current after electric-controlled plate rectification；
The S2, comprising:
When the rising edge for detecting first electric signal arrives, start timing；
When the rising edge of second electric signal arrives, stop timing, and using the duration of timing as first electricity
The second time between time point when the rising edge at time point and second electric signal when signal rising edge arrives arrives
Interval；
According to the first time interval and second time interval, determine the three phase mains whether anti-phase, if
It is to execute S3, otherwise, executes S4.
Preferably,
The first phase current, the second phase current and the third phase electricity of the three phase mains output normally connected according to triple line
The period of stream determines the time point when rising edge of the third electric signal of the first end output of the electric-controlled plate arrives, and described
The first time interval between time point when the rising edge of 4th electric signal of the second end output of electric-controlled plate arrives, comprising:
According to the following formula, determine the electric-controlled plate first end output third electric signal rising edge arrive when
Between point, the first time between time point when the rising edge of the 4th electric signal exported with the second end of the electric-controlled plate arrives
Interval:
Wherein, S characterizes the first time interval, and T characterizes the of the three phase mains output that the triple line normally connects
The period of one phase current, the second phase current and third phase current.
Preferably,
It is described according to the first time interval and second time interval, determine the three phase mains whether anti-phase,
If so, executing S3, otherwise, S4 is executed, comprising:
Determine the difference of second time interval and the first time interval, if it is greater than preset threshold value, if so,
S3 is executed, otherwise, executes S4.
Preferably,
The S4, comprising:
D1: determine that first electric signal is in the duration of same logic level state, if be greater than described to be detected three
At least one period of the first phase current, the second phase current and third phase current that phase power supply exports, if so, described in executing
Otherwise S5 executes D2；
D2: determine that second electric signal is in the duration of same logic level state, if be greater than described at least one
Period, if so, executing the S5.
Preferably,
When three phase mains to be detected powers on,
Before the S1, further comprise:
Determine the electric-controlled plate that is connected with the three phase mains to be detected whether power loss, if so, execute the S5, otherwise,
Execute the S1.
Second aspect, the embodiment of the invention provides a kind of open phases of three-phase power source anti-phase protective devices, comprising:
Signal acquisition module, for executing S1 when three phase mains to be detected powers on: acquiring the first end output of electric-controlled plate
The first electric signal and second end output the second electric signal, wherein first electric signal be the three phase mains to be detected
Signal of the first phase current and the second phase current of output after electric-controlled plate rectification, second electric signal be it is described to
Detect the signal of the second phase current and third phase current of three phase mains output after electric-controlled plate rectification；
Signal detection module, for executing S2: according to first electric signal of signal acquisition module acquisition and institute
State the second electric signal, determine the three phase mains to be detected whether anti-phase, if so, triggering message output module execute S3: it is defeated
Out for prompting the first prompt information of the three phase mains anti-phase to be detected, and trigger motor stopping module；Otherwise, it executes
S4；S4: according to first electric signal and second electric signal, determine the three phase mains to be detected whether phase shortage, if
Be that message output module executes S5: output is triggered for prompting the second prompt information of the open phases of three-phase power source to be detected
The motor stopping module；
The motor stopping module when for being triggered, executes S6: the motor of the control three phase mains connection to be detected
It is out of service.
Preferably,
Further comprise: information determination module；
The information determination module, the first phase current of the three phase mains output for normally being connected according to triple line, the
The period of two-phase current and third phase current determines that the rising edge of the third electric signal of the first end output of the electric-controlled plate arrives
When time point, the between the time point when rising edge of the 4th electric signal exported with the second end of the electric-controlled plate arrives
One time interval, wherein the third electric signal is the first phase current of the three phase mains output that the triple line normally connects
With signal of second phase current after electric-controlled plate rectification, the 4th electric signal is three that the triple line normally connects
Signal of the second phase current and third phase current of phase power supply output after electric-controlled plate rectification；
The signal detection module, for starting timing when the rising edge for detecting first electric signal arrives；
When the rising edge of second electric signal arrives, stop timing, and using the duration of timing as first electricity
The second time between time point when the rising edge at time point and second electric signal when signal rising edge arrives arrives
Interval；
According to the first time interval and second time interval, determine the three phase mains whether anti-phase, if
It is to execute S3, otherwise, executes S4.
Preferably,
The information determination module, the third electricity of the first end output for according to the following formula, determining the electric-controlled plate
When the rising edge at the time point when rising edge of signal arrives, the 4th electric signal exported with the second end of the electric-controlled plate arrives
Time point between first time interval:
Wherein, S characterizes the first time interval, and T characterizes the of the three phase mains output that the triple line normally connects
The period of one phase current, the second phase current and third phase current.
Preferably,
The signal detection module, for determining the difference of second time interval and the first time interval, if
Greater than preset threshold value, if so, executing S3, otherwise, S4 is executed.
Preferably,
The signal detection module, for executing:
D1: determine that first electric signal is in the duration of same logic level state, if be greater than described to be detected three
At least one period of the first phase current, the second phase current and third phase current that phase power supply exports, if so, described in executing
Otherwise S5 executes D2；
D2: determine that second electric signal is in the duration of same logic level state, if be greater than described at least one
Period, if so, executing the S5.
Preferably,
The open phases of three-phase power source anti-phase protective device, further comprises: powering on detection module；
It is described to power on detection module, for determining and the three phase mains to be detected when three phase mains to be detected powers on
Whether otherwise power loss if so, executing the S5, executes the S1 to connected electric-controlled plate.
Guard method and device in a kind of three phase mains to be detected provided by the invention, by acquisition electric-controlled plate to be checked
The first phase current and the conversion of the second phase current for surveying three phase mains output are formed by the first electric signal, and to three-phase to be detected
The second phase current and third phase current rectification of power supply output are formed by the second electric signal, can be according to the first electric signal and the
Two electric signals come determine three phase mains to be detected whether phase shortage or anti-phase, and in three phase mains anti-phase to be detected, output is used
In the prompt information for prompting three phase mains anti-phase to be detected, so that outside understands three phase mains anti-phase to be detected, and to be detected
When open phases of three-phase power source, the second prompt information for prompting open phases of three-phase power source to be detected is exported, so that outside understanding is to be checked
Open phases of three-phase power source is surveyed to be required to carry out shutdown processing to connected motor when open phases of three-phase power source to be detected or anti-phase,
To prevent motor damage.To sum up, the first phase current, the second phase current by detection electric-controlled plate to three phase mains to be detected
The first electric signal and the second electric signal that rectification formation is carried out with third phase current, that is, can determine whether three phase mains to be detected lacks
Phase anti-phase examines three-phase to be detected without passing through the phase shortage anti-phase of artificial detection three phase mains to be detected so as to shorten
The time of power phase shortage anti-phase, to improve the efficiency for examining open phases of three-phase power source anti-phase to be detected.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of flow chart for open phases of three-phase power source anti-phase guard method that one embodiment of the invention provides；
Fig. 2 is the third electric signal for the electric-controlled plate output that one embodiment of the invention provides and the timing diagram of the 4th electric signal；
When Fig. 3 is that the first phase of the three phase mains to be detected that one embodiment of the invention provides is connected with third phase anti-phase, electricity
Control the first electric signal of plate output and the timing diagram of the second electric signal；
Fig. 4 be one embodiment of the invention provide when the first phase of three phase mains to be detected and the second phase normally connect, the
When three-phase lack phase, the first electric signal of electric-controlled plate output and the timing diagram of the second electric signal；
Fig. 5 is the flow chart for another open phases of three-phase power source anti-phase guard method that one embodiment of the invention provides；
Fig. 6 is a kind of circuit diagram for electric-controlled plate that one embodiment of the invention provides；
Fig. 7 is a kind of structural schematic diagram for open phases of three-phase power source anti-phase protective device that one embodiment of the invention provides.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the invention provides a kind of open phases of three-phase power source anti-phase guard methods, comprising:
S1: when three phase mains to be detected powers on, the first electric signal and second end of the first end output of electric-controlled plate are acquired
Second electric signal of output, wherein first electric signal is the first phase current and the of the three phase mains to be detected output
Signal of the two-phase current after electric-controlled plate rectification, second electric signal are the of the three phase mains to be detected output
The signal of two-phase current and third phase current after electric-controlled plate rectification；
S2: according to first electric signal and second electric signal, determine the three phase mains to be detected whether anti-phase,
If so, executing S3, otherwise, S4 is executed；
S3: output executes S6 for prompting the first prompt information of the three phase mains anti-phase to be detected；
S4: according to first electric signal and second electric signal, determine the three phase mains to be detected whether phase shortage,
If so, executing S5；
S5: output executes S6 for prompting the second prompt information of the open phases of three-phase power source to be detected；
S6: the motor of the control three phase mains connection to be detected is out of service.
In embodiments of the present invention, the first phase current and second three phase mains to be detected exported by acquiring electric-controlled plate
Phase current conversion is formed by the first electric signal, and the second phase current and third phase current to three phase mains to be detected output
Rectification is formed by the second electric signal, three phase mains to be detected can be determined according to the first electric signal and the second electric signal whether
Phase shortage or anti-phase, and in three phase mains anti-phase to be detected, it exports for prompting the prompt of three phase mains anti-phase to be detected to believe
Breath exports to be detected for prompting so that outside understands three phase mains anti-phase to be detected, and in open phases of three-phase power source to be detected
Second prompt information of open phases of three-phase power source, so that outside understands open phases of three-phase power source to be detected, when three phase mains to be detected lacks
When phase or anti-phase, it is required to carry out shutdown processing to connected motor, to prevent motor damage.To sum up, pass through detection
Electric-controlled plate carries out the first electricity of rectification formation to the first phase current, the second phase current and third phase current of three phase mains to be detected
Signal and the second electric signal, that is, can determine three phase mains to be detected whether phase shortage anti-phase, without by artificial detection it is to be detected
The phase shortage anti-phase of three phase mains, to can not only reduce the cost of open phases of three-phase power source anti-phase to be detected, additionally it is possible to shorten inspection
The time of open phases of three-phase power source anti-phase to be detected is tested, to improve the efficiency for examining open phases of three-phase power source anti-phase to be detected.
In an embodiment of the present invention, before the S2, further comprise:
First phase current of the three phase mains output normally connected according to triple line, the second phase current and third phase current
Period determines the time point when rising edge of the third electric signal of the first end output of the electric-controlled plate arrives, and described automatically controlled
The first time interval between time point when the rising edge of 4th electric signal of the second end output of plate arrives, wherein described
Third electric signal is described in the first phase current that the three phase mains that the triple line normally connects exports and the second phase current process
Signal after electric-controlled plate rectification, the 4th electric signal are the two phase electricity for the three phase mains output that the triple line normally connects
The signal of stream and third phase current after electric-controlled plate rectification；
The S2, comprising:
When the rising edge for detecting first electric signal arrives, start timing；
When the rising edge of second electric signal arrives, stop timing, and using the duration of timing as first electricity
The second time between time point when the rising edge at time point and second electric signal when signal rising edge arrives arrives
Interval；
According to the first time interval and second time interval, determine the three phase mains whether anti-phase, if
It is to execute S3, otherwise, executes S4.
In embodiments of the present invention, the period of three-phase alternating current is exported by the three phase mains that three-phase wire normally connects,
The first phase current and the second phase current that can determine three phase mains output when three-phase wire normally connects are by electric-controlled plate
Third electric signal is formed by after rectification, it is whole by electric-controlled plate with the second phase current and third phase current of three phase mains output
Be formed by after stream the 4th electric signal when reaching rising edge between first time interval.By in electric-controlled plate to be detected three
The first phase current and the second phase current of phase power supply rectified after the first electric signal rising edge arrival when, start to count
When, and the rising in electric-controlled plate to the second electric signal after the second phase current and third phase current rectification of three phase mains to be detected
Along stopping timing when arriving, when the rising edge of the rising edge and the second electric signal that can determine the first electric signal arrives between the
Two time intervals can determine three phase mains to be detected with the presence or absence of inverse according to the second time interval and first time interval
Phase situation examines three-phase to be detected without detecting by the anti-phase manually to three phase mains to be detected so as to shorten
The time of power supply anti-phase, to improve the efficiency for examining three-phase electricity anti-phase.
In an embodiment of the present invention, it is described normally connected according to triple line three phase mains output the first phase current,
The period of second phase current and third phase current determines that the rising edge of the third electric signal of the first end output of the electric-controlled plate arrives
Between time point when the rising edge at time point when coming, the 4th electric signal exported with the second end of the electric-controlled plate arrives
First time interval, comprising:
According to the following formula, determine the electric-controlled plate first end output third electric signal rising edge arrive when
Between point, the first time between time point when the rising edge of the 4th electric signal exported with the second end of the electric-controlled plate arrives
Interval:
Wherein, S characterizes the first time interval, and T characterizes the of the three phase mains output that the triple line normally connects
The period of one phase current, the second phase current and third phase current.
In embodiments of the present invention, the first phase current of the three phase mains output normally connected due to triple line, the second phase
Electric current and third phase current are sine wave, therefore, by above-mentioned formula, can determine the of the three phase mains normally connected
The third electric signal of one phase current and the second phase current after electric-controlled plate rectifies, with the second phase current of the three phase mains and
First time interval between when the rising edge of fourth electric signal of the three-phase current after electric-controlled plate rectifies arrives.
For example, third electric signal is the first phase current " R phase electricity " for the three phase mains that electric-controlled plate normally connects triple line
" the RS signal " exported after being rectified with the second phase current " S phase electricity ", the 4th electric signal is that electric-controlled plate normally connects triple line
" the ST signal " that the second phase current " S phase electricity " and third phase current " T-phase electricity " of the three phase mains connect export after being rectified.
The three phase mains that triple line normally connects is 50Hz power frequency, then a cycle of three phase mains output three-phase electricity
It is 20 milliseconds, when the rising edge of third electric signal arrives, using S=2/6*20, i.e., about 6.667 milliseconds, the 4th telecommunications
Number just have a rising edge, therefore when third electric signal rising edge arrives, when arriving with the 4th electric signal rising edge first when
Between be spaced 6.667 milliseconds.
As shown in Fig. 2, the third electric signal of electric-controlled plate output and the timing diagram of the 4th electric signal.
As shown in figure 3, when the first phase of three phase mains to be detected is connected with third phase anti-phase, the first of electric-controlled plate output
The timing diagram of electric signal and the second electric signal.
In an embodiment of the present invention, described according to the first time interval and second time interval, determine institute
State three phase mains whether anti-phase, if so, execute S3, otherwise, execute S4, comprising:
Determine the difference of second time interval and the first time interval, if it is greater than preset threshold value, if so,
S3 is executed, otherwise, executes S4.
In embodiments of the present invention, due to starting timing there are delay time, stopping timing, there is also delay times, so
It will start timing and be used as preset threshold value with the sum of delay time existing for timing is stopped, for example, 1 millisecond, by determining second
The second time interval when the rising edge of electric signal arrives, when arriving with the first electric signal rising edge, if be greater than to be detected three
First time when phase power supply normally connects, when the rising edge of the second electric signal arrives, when arriving with the first electric signal rising edge
The sum of the delay time (that is, preset threshold value) at interval and timing can determine three phase mains to be detected with the presence or absence of anti-phase
Situation.
As shown in figure 4, when the first phase of three phase mains to be detected and the second phase normally connect, it is automatically controlled when third phase phase shortage
First electric signal of plate output and the timing diagram of the second electric signal.
In an embodiment of the present invention, the S4, comprising:
D1: determine that first electric signal is in the duration of same logic level state, if be greater than described to be detected three
At least one period of the first phase current, the second phase current and third phase current that phase power supply exports, if so, described in executing
Otherwise S5 executes D2；
D2: determine that second electric signal is in the duration of same logic level state, if be greater than described at least one
Period, if so, executing the S5.
In embodiments of the present invention, when the first electric signal or the second electric signal are in high level state or low level shape
The duration of state can determine three phase mains to be detected when exporting at least one period of three-phase electricity greater than three phase mains to be detected
The case where there are phase shortages, it is therefore desirable to report failure, i.e., output is for prompting the second prompt information of three line power phase shortages, and stops
Motor operation damages motor to avoid open phases of three-phase power source to be detected.
In an embodiment of the present invention, when three phase mains to be detected powers on,
Before the S1, further comprise:
Determine the electric-controlled plate that is connected with the three phase mains to be detected whether power loss, if so, execute the S5, otherwise,
Execute the S1.
In embodiments of the present invention, when certain phase phase shortage of three phase mains to be detected, since coupled electric-controlled plate cannot
Forming circuit, therefore electric-controlled plate power loss, the motor being connected with electric-controlled plate can not work, it can be to be detected for prompting by exporting
Second prompt information of open phases of three-phase power source carries out malfunction notification.
In order to more clearly illustrate technical solution of the present invention and advantage, below to one kind provided in an embodiment of the present invention
Three phase mains lacuna anti-phase guard method to be detected is described in detail, as shown in figure 5, can specifically include following steps:
Step 501: according to the first phase current, the second phase current and the third of the three phase mains output that triple line normally connects
The period of phase current determines the time point when rising edge of the third electric signal of the first end output of electric-controlled plate arrives, and automatically controlled
The first time interval between time point when the rising edge of 4th electric signal of the second end output of plate arrives, wherein third
The first phase current and the second phase current that electric signal is the three phase mains output that triple line normally connects are after electric-controlled plate rectifies
Signal, the 4th electric signal be triple line normally connect three phase mains output the second phase current and third phase current by electricity
Signal after controlling plate rectification.
Specifically, according to following formula, by the period for the three-phase electricity that the three phase mains that triple line normally connects exports, really
Determine the first phase current and the second phase current shape after electric-controlled plate is rectified for the three phase mains output that triple line normally connects
At the rising edge of third electric signal arrive when, the second phase current and third of the three phase mains output normally connecting with triple line
The first time interval when rising edge for the 4th electric signal that phase current is formed after electric-controlled plate is rectified arrives:
Wherein, the arrive rising edge of corresponding time point and the 4th electric signal of the rising edge that S characterizes third electric signal arrives
First time interval between corresponding time point, the first phase current of the three phase mains output that T characterization triple line normally connects,
The period of second phase current and third phase current.
For example, the power frequency 60Hz for the three-phase current that triple line normally connects, the period for exporting three-phase current is 1/60
Millisecond, then according to above-mentioned formula, when the rising edge of third electric signal arrives, using 2/6*1/60, i.e., about 5.556 millis
Second, the rising edge of the 4th electric signal arrives, then arriving when the rising edge of third electric signal arrives with the rising edge of the 4th electric signal
First time interval between when coming is 5.556 milliseconds.
Step 502: when three phase mains to be detected powers on, determining whether the electric-controlled plate being connected with three phase mains to be detected loses
Otherwise electricity, executes step 503 if so, executing step 510.
Specifically, the circuit diagram of electric-controlled plate is referring to FIG. 6, when the electric phase shortage of the first phase R phase of three phase mains to be detected, by
It cannot be formed into a loop in electric-controlled plate, electric-controlled plate power loss can be determined by L line in Fig. 6 and N line, therefore failure can be reported to stop
Machine, i.e., output is for prompting the prompt information of open phases of three-phase power source to be detected, and stops the operation of motor, to avoid to be detected three
Phase power phase shortage causes the damage of motor.
Step 503: acquiring the first electric signal of the first end output of electric-controlled plate and the second electric signal of second end output.
Specifically, electric-controlled plate first end output the first electric signal be three phase mains to be detected output the first phase current and
Signal of second phase current after electric-controlled plate rectifies, the second electric signal of electric-controlled plate first end output are three phase mains to be detected
The signal after electric-controlled plate rectifies of the second phase current and third phase current of output, the first electric signal and the second electric signal can be with
Determine whether lacuna anti-phase improves three phase mains to be detected so as to shorten the time for detecting open phases of three-phase power source anti-phase to be detected
Detect the efficiency of three phase mains lacuna anti-phase to be detected.
Step 504: when the rising edge for detecting the first electric signal arrives, starting timing.
Step 505: when the rising edge of the second electric signal arrives, stopping timing, and using the duration of timing as the first electricity
Signal rising edge arrives the second time that corresponding time point and the rising edge of the second electric signal arrived between corresponding time point
Interval.
Step 506: determining the difference of the second time interval and first time interval, if it is greater than preset threshold value, if so,
Step 507 is executed, otherwise, executes step 508.
Specifically, by detecting the first electric signal and the second electric signal of electric-controlled plate output second when rising edge arrives
Time interval can calculate the difference of the second time interval and first time interval, since there are delay times for timing, such as
1 millisecond, so whether be greater than preset threshold value by determining the difference of the second time interval and first time interval, i.e. timing
Delay time is assured that the case where three phase mains to be detected is with the presence or absence of anti-phase.
Step 507: output executes step 511 for prompting the first prompt information of three phase mains anti-phase to be detected.
Specifically, determining that three phase mains to be detected there are when anti-phase situation, can export the first prompt information, with prompt
Three phase mains anti-phase to be detected, and shutdown processing is carried out to motor, to prevent open phases of three-phase power source from damaging motor.
Step 508: determining that the first electric signal is in the duration of same logic level state, if be greater than three-phase electricity to be detected
At least one period of the first phase current, the second phase current and third phase current that source exports, if so, step 510 is executed, it is no
Then, step 509 is executed.
Step 509: determining that the second electric signal is in the duration of same logic level state, if be greater than at least one week
Otherwise phase, executes step 512 if so, executing step 510.
Specifically, referring to FIG. 6, when S phase phase shortage, since R and S phase cannot constitute circuit, S and T-phase can not be constituted
Circuit have passed through resistance R0 simultaneously and two resistance values of resistance R1 be biggish although R and T-phase theoretically can also constitute circuit
Current-limiting resistance, electric current, which is not enough to drive, allows photoelectrical coupler IC1, IC2 to be connected, to make the first telecommunications exported by resistance R6
Number and the second electric signal for being exported by resistance R7 be all always high level state, hence, it can be determined that three phase mains to be detected
There are phase shortages.Even if resistance R0 and resistance R1 resistance are smaller, photoelectrical coupler IC1, photoelectrical coupler IC2 conducting pass through resistance
First electric signal of R6 output and the second electric signal exported by resistance R7 are all always low level state, therefore can also be true
Fixed open phases of three-phase power source to be detected.Another situation is when the T-phase phase shortage of three phase mains to be detected, although R and S phase has just
Normal phase, but S and T-phase can not be allowed to photoelectrical coupler IC2 conducting due to lacking circuit causes to export by resistance R7
Second electric signal is high level state always, and can equally determining three phase mains to be detected, there are phase shortages.
Step 510: exporting the second prompt information for prompting open phases of three-phase power source to be detected, and execute 511.
Specifically, determining that three phase mains to be detected there are when phase shortage situation, can export the second prompt information, and to electricity
Machine carries out shutdown processing, and open phases of three-phase power source is avoided to damage motor.
Step 511: the motor for controlling three phase mains connection to be detected is out of service.
Step 512: terminating current process.
Specifically, in the first electric signal and the second electric signal exported according to the electric-controlled plate of acquisition, three-phase to be detected is determined
When phase shortage anti-phase situation is not present in power supply, it can determine that the triple line of three phase mains to be detected normally connects, therefore can terminate
Current process.
Fig. 6 shows the first phase R of three phase mains to be detected, and the second phase S, third phase T, R0~R7 are resistance, and D1, D2 are
Diode, IC1, IC2 are photoelectrical coupler, and D3, D4 are triode, and N is neutral point, i.e. ground wire and the first output terminals A and the
Two output end B.
As shown in fig. 7, the present invention provides a kind of open phases of three-phase power source anti-phase protective devices, comprising:
Signal acquisition module 701, for executing S1: acquiring the first end of electric-controlled plate when three phase mains to be detected powers on
Second electric signal of the first electric signal and the second end output of output, wherein first electric signal is the three-phase to be detected
Signal of the first phase current and the second phase current of power supply output after electric-controlled plate rectification, second electric signal is institute
State the signal of the second phase current and third phase current of three phase mains output to be detected after electric-controlled plate rectification；
Signal detection module 702, for executing S2: first telecommunications acquired according to the signal acquisition module 701
Number and second electric signal, determine the three phase mains to be detected whether anti-phase, if so, triggering message output module 703
Execute S3: output triggers motor stopping module for prompting the first prompt information of the three phase mains anti-phase to be detected
704；Otherwise, S4 is executed；S4: according to first electric signal and second electric signal, the three phase mains to be detected is determined
Whether phase shortage, if so, message output module 703 executes S5: exporting for prompting the open phases of three-phase power source to be detected
Two prompt informations, and trigger the motor stopping module 704；
The motor stopping module 704 when for being triggered, executes S6: the control three phase mains connection to be detected
Motor is out of service.
In embodiments of the present invention, first three phase mains to be detected exported by signal acquisition module acquisition electric-controlled plate
Phase current and the conversion of the second phase current are formed by the first electric signal, and the second phase current to three phase mains to be detected output
It is formed by the second electric signal with third phase current rectification, signal detection module can be according to the first electric signal and the second electric signal
Come determine three phase mains to be detected whether phase shortage or anti-phase, and in three phase mains anti-phase to be detected, triggering information exports mould
Block exports the prompt information for prompting three phase mains anti-phase to be detected, so that outside understands three phase mains anti-phase to be detected, and
In open phases of three-phase power source to be detected, the second prompt information for prompting open phases of three-phase power source to be detected is exported, so as to outside
Understand open phases of three-phase power source to be detected, when open phases of three-phase power source to be detected or anti-phase, is required to through motor stopping module
Shutdown processing is carried out to connected motor, to prevent motor damage.To sum up, by detection electric-controlled plate to three-phase electricity to be detected
First phase current, the second phase current and the third phase current in source carry out the first electric signal and the second electric signal of rectification formation, i.e.,
Can determine three phase mains to be detected whether phase shortage anti-phase, without by the phase shortage anti-phase of artificial detection three phase mains to be detected,
To can not only reduce the cost of open phases of three-phase power source anti-phase to be detected, additionally it is possible to shorten and examine open phases of three-phase power source to be detected
The time of anti-phase, to improve the efficiency for examining open phases of three-phase power source anti-phase to be detected.
In an embodiment of the present invention, the open phases of three-phase power source anti-phase protective device, further comprise: information determines mould
Block；
The information determination module, the first phase current of the three phase mains output for normally being connected according to triple line, the
The period of two-phase current and third phase current determines that the rising edge of the third electric signal of the first end output of the electric-controlled plate arrives
When time point, the between the time point when rising edge of the 4th electric signal exported with the second end of the electric-controlled plate arrives
One time interval, wherein the third electric signal is the first phase current of the three phase mains output that the triple line normally connects
With signal of second phase current after electric-controlled plate rectification, the 4th electric signal is three that the triple line normally connects
Signal of the second phase current and third phase current of phase power supply output after electric-controlled plate rectification；
The signal detection module, for starting timing when the rising edge for detecting first electric signal arrives；
When the rising edge of second electric signal arrives, stop timing, and using the duration of timing as first electricity
The second time between time point when the rising edge at time point and second electric signal when signal rising edge arrives arrives
Interval；
According to the first time interval and second time interval, determine the three phase mains whether anti-phase, if
It is to execute S3, otherwise, executes S4.
In an embodiment of the present invention, the information determination module, for according to the following formula, determining the electric-controlled plate
The time point when rising edge of the third electric signal of first end output arrives, the 4th electricity exported with the second end of the electric-controlled plate
The first time interval between time point when the rising edge of signal arrives:
Wherein, S characterizes the first time interval, and T characterizes the of the three phase mains output that the triple line normally connects
The period of one phase current, the second phase current and third phase current.
In an embodiment of the present invention, the signal detection module, for determining second time interval and described the
The difference of one time interval, if be greater than preset threshold value, if so, executing S3, otherwise, execute S4.
In an embodiment of the present invention, the signal detection module, for executing:
D1: determine that first electric signal is in the duration of same logic level state, if be greater than described to be detected three
At least one period of the first phase current, the second phase current and third phase current that phase power supply exports, if so, described in executing
Otherwise S5 executes D2；
D2: determine that second electric signal is in the duration of same logic level state, if be greater than described at least one
Period, if so, executing the S5.
In an embodiment of the present invention, the open phases of three-phase power source anti-phase protective device further comprises: upper electro-detection mould
Block；
It is described to power on detection module, for determining and the three phase mains to be detected when three phase mains to be detected powers on
Whether otherwise power loss if so, executing the S5, executes the S1 to connected electric-controlled plate.
The each embodiment of the present invention at least has the following beneficial effects:
1, the first phase current in an embodiment of the present invention, three phase mains to be detected export by acquisition electric-controlled plate with
The conversion of second phase current is formed by the first electric signal, and the second phase current and third phase to three phase mains to be detected output
Current rectification is formed by the second electric signal, and three phase mains to be detected can be determined according to the first electric signal and the second electric signal
Whether phase shortage or anti-phase are exported for prompting mentioning for three phase mains anti-phase to be detected and in three phase mains anti-phase to be detected
Show information, so that outside understands three phase mains anti-phase to be detected, and in open phases of three-phase power source to be detected, output for prompt to
The second prompt information of open phases of three-phase power source is detected, so that outside understands open phases of three-phase power source to be detected, when three-phase electricity to be detected
When source phase shortage or anti-phase, it is required to carry out shutdown processing to connected motor, to prevent motor damage.To sum up, pass through
Detection electric-controlled plate carries out the of rectification formation to the first phase current, the second phase current and third phase current of three phase mains to be detected
One electric signal and the second electric signal, that is, can determine three phase mains to be detected whether phase shortage anti-phase, without being waited for by artificial detection
The phase shortage anti-phase for detecting three phase mains, to can not only reduce the cost of open phases of three-phase power source anti-phase to be detected, additionally it is possible to contract
The short time for examining open phases of three-phase power source anti-phase to be detected, to improve the efficiency for examining open phases of three-phase power source anti-phase to be detected.
2, the week of three-phase alternating current in an embodiment of the present invention, is exported by the three phase mains that three-phase wire normally connects
Phase, the first phase current and the second phase current that can determine three phase mains output when three-phase wire normally connects are by automatically controlled
It is formed by third electric signal after plate rectification, passes through electric-controlled plate with the second phase current and third phase current of three phase mains output
Be formed by after rectification the 4th electric signal when reaching rising edge between first time interval.By in electric-controlled plate to be detected
The first phase current and the second phase current of three phase mains rectified after the first electric signal rising edge arrival when, start to count
When, and the rising in electric-controlled plate to the second electric signal after the second phase current and third phase current rectification of three phase mains to be detected
Along stopping timing when arriving, when the rising edge of the rising edge and the second electric signal that can determine the first electric signal arrives between the
Two time intervals can determine three phase mains to be detected with the presence or absence of inverse according to the second time interval and first time interval
Phase situation examines three-phase to be detected without detecting by the anti-phase manually to three phase mains to be detected so as to shorten
The time of power supply anti-phase, to improve the efficiency for examining three-phase electricity anti-phase.
3, the first phase current of the three phase mains output in an embodiment of the present invention, normally connected due to triple line, the
Two-phase current and third phase current are sine wave, therefore, by above-mentioned formula, can determine the three phase mains normally connected
Third electric signal after electric-controlled plate rectifies of the first phase current and the second phase current, the second phase current with the three phase mains
And fourth electric signal of the third phase current after electric-controlled plate rectifies rising edge arrive when between first time interval.
4, in an embodiment of the present invention, due to starting timing there are delay time, stop timing there is also delay time,
So will start the sum of delay time existing for timing and stopping timing being used as preset threshold value, for example, 1 millisecond, pass through determination
The second time interval when the rising edge of second electric signal arrives, when arriving with the first electric signal rising edge, if be greater than to be checked
When survey three phase mains normally connects, when the rising edge of the second electric signal arrives, with first when the arrival of the first electric signal rising edge
The sum of time interval and the delay time (that is, preset threshold value) of timing can determine three phase mains to be detected with the presence or absence of inverse
The case where phase.
5, in an embodiment of the present invention, when the first electric signal or the second electric signal are in high level state or low electricity
The duration of level state can determine three-phase to be detected when exporting at least one period of three-phase electricity greater than three phase mains to be detected
Power supply the case where there are phase shortages, it is therefore desirable to report failure, i.e. output for prompting the second prompt information of three line power phase shortages, and
Stop motor operation, damages motor to avoid open phases of three-phase power source to be detected.
6, in an embodiment of the present invention, when certain phase phase shortage of three phase mains to be detected, due to coupled electric-controlled plate
Cannot be formed into a loop, therefore electric-controlled plate power loss, the motor being connected with electric-controlled plate can not work, can by output for prompt to
The second prompt information of open phases of three-phase power source is detected, malfunction notification is carried out.
It should be noted that, in this document, such as first and second etc relational terms are used merely to an entity
Or operation is distinguished with another entity or operation, is existed without necessarily requiring or implying between these entities or operation
Any actual relationship or order.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-
It is exclusive to include, so that the process, method, article or equipment for including a series of elements not only includes those elements,
It but also including other elements that are not explicitly listed, or further include solid by this process, method, article or equipment
Some elements.In the absence of more restrictions, the element limited by sentence " including a 〃 〃 ", it is not excluded that
There is also other identical factors in the process, method, article or apparatus that includes the element.
Finally, it should be noted that the foregoing is merely presently preferred embodiments of the present invention, it is merely to illustrate skill of the invention
Art scheme, is not intended to limit the scope of the present invention.Any modification for being made all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., are included within the scope of protection of the present invention.
Claims (10)
1. a kind of open phases of three-phase power source anti-phase guard method characterized by comprising
When three phase mains to be detected powers on,
S1: the first electric signal of the first end output of electric-controlled plate and the second electric signal of second end output are acquired, wherein described the
The first phase current and the second phase current that one electric signal is the three phase mains output to be detected are after electric-controlled plate rectification
Signal, described in second electric signal is the second phase current of the three phase mains to be detected output and third phase current passes through
Signal after electric-controlled plate rectification；
S2: according to first electric signal and second electric signal, determine the three phase mains to be detected whether anti-phase, if
It is to execute S3, otherwise, executes S4；
S3: output executes S6 for prompting the first prompt information of the three phase mains anti-phase to be detected；
S4: according to first electric signal and second electric signal, determine the three phase mains to be detected whether phase shortage, if
It is to execute S5；
S5: output executes S6 for prompting the second prompt information of the open phases of three-phase power source to be detected；
S6: the motor of the control three phase mains connection to be detected is out of service.
2. open phases of three-phase power source anti-phase guard method according to claim 1, which is characterized in that
Before the S2, further comprise:
The week of the first phase current, the second phase current and third phase current that are exported according to the three phase mains that triple line normally connects
Phase determines the time point when rising edge of the third electric signal of the first end output of the electric-controlled plate arrives, with the electric-controlled plate
Time point when arriving of the rising edge of the 4th electric signal of second end output between first time interval, wherein described the
The first phase current and the second phase current that three electric signals are the three phase mains output that the triple line normally connects are by the electricity
Signal after controlling plate rectification, the 4th electric signal are the second phase current of the three phase mains output that the triple line normally connects
With signal of the third phase current after electric-controlled plate rectification；
The S2, comprising:
When the rising edge for detecting first electric signal arrives, start timing；
When the rising edge of second electric signal arrives, stop timing, and using the duration of timing as first electric signal
The second time interval between time point when the rising edge at time point and second electric signal when rising edge arrives arrives；
According to the first time interval and second time interval, determine the three phase mains whether anti-phase, if so, holding
Otherwise row S3 executes S4.
3. open phases of three-phase power source anti-phase guard method according to claim 2, which is characterized in that
The first phase current, the second phase current and the third phase current that the three phase mains normally connected according to triple line exports
Period determines the time point when rising edge of the third electric signal of the first end output of the electric-controlled plate arrives, and described automatically controlled
The first time interval between time point when the rising edge of 4th electric signal of the second end output of plate arrives, comprising:
According to the following formula, the time when rising edge of the third electric signal of the first end output of the electric-controlled plate arrives is determined
Between the first time between time point when the rising edge of point, the 4th electric signal exported with the second end of the electric-controlled plate arrives
Every:
Wherein, S characterizes the first time interval, and T characterizes the first phase of the three phase mains output that the triple line normally connects
The period of electric current, the second phase current and third phase current.
4. open phases of three-phase power source anti-phase guard method according to claim 2, which is characterized in that
It is described according to the first time interval and second time interval, determine the three phase mains whether anti-phase, if
It is to execute S3, otherwise, executes S4, comprising:
Determine the difference of second time interval and the first time interval, if be greater than preset threshold value, if so, executing
Otherwise S3 executes S4.
5. open phases of three-phase power source anti-phase guard method according to claim 1, which is characterized in that
The S4, comprising:
D1: determine that first electric signal is in the duration of same logic level state, if be greater than the three-phase electricity to be detected
At least one period of the first phase current, the second phase current and third phase current that source exports, if so, the S5 is executed, it is no
Then, D2 is executed；
D2: determine that second electric signal is in the duration of same logic level state, if it is greater than at least one described period,
If so, executing the S5；
And/or
When three phase mains to be detected powers on,
Before the S1, further comprise:
Determine whether otherwise power loss, executes the electric-controlled plate being connected with the three phase mains to be detected if so, executing the S5
The S1.
6. a kind of open phases of three-phase power source anti-phase protective device characterized by comprising
Signal acquisition module executes S1 for when three phase mains to be detected powers on: acquiring the of the first end output of electric-controlled plate
Second electric signal of one electric signal and second end output, wherein first electric signal is the three phase mains output to be detected
The first phase current and the second phase current by the electric-controlled plate rectification after signal, second electric signal be it is described to be detected
Signal of the second phase current and third phase current of three phase mains output after electric-controlled plate rectification；
Signal detection module, for executing S2: according to first electric signal of signal acquisition module acquisition and described the
Two electric signals, determine the three phase mains to be detected whether anti-phase, if so, triggering message output module execute S3: output use
In the first prompt information of the prompt three phase mains anti-phase to be detected, and trigger motor stopping module；Otherwise, S4 is executed；S4:
According to first electric signal and second electric signal, determine the three phase mains to be detected whether phase shortage, if so, information
Output module executes S5: output triggers the electricity for prompting the second prompt information of the open phases of three-phase power source to be detected
Machine shuts down module；
The motor stopping module when for being triggered, executes S6: the motor of the control three phase mains connection to be detected stops
Operation.
7. open phases of three-phase power source anti-phase protective device according to claim 6, which is characterized in that further comprise: information
Determining module；
The information determination module, the first phase current of the three phase mains output for normally being connected according to triple line, the second phase
The period of electric current and third phase current determines when the rising edge of the third electric signal of the first end output of the electric-controlled plate arrives
Time point, between the time point when rising edge of the 4th electric signal exported with the second end of the electric-controlled plate arrives first when
Between be spaced, wherein the third electric signal is the first phase current and for the three phase mains output that the triple line normally connects
Signal of the two-phase current after electric-controlled plate rectification, the 4th electric signal are the three-phase electricity that the triple line normally connects
Signal of the second phase current and third phase current of source output after electric-controlled plate rectification；
The signal detection module, for starting timing when the rising edge for detecting first electric signal arrives；
When the rising edge of second electric signal arrives, stop timing, and using the duration of timing as first electric signal
The second time interval between time point when the rising edge at time point and second electric signal when rising edge arrives arrives；
According to the first time interval and second time interval, determine the three phase mains whether anti-phase, if so, holding
Otherwise row S3 executes S4.
8. open phases of three-phase power source anti-phase protective device according to claim 7, which is characterized in that
The information determination module, the third electric signal of the first end output for according to the following formula, determining the electric-controlled plate
Time point of rising edge when arriving, when the rising edge of the 4th electric signal exported with the second end of the electric-controlled plate arrives when
Between point between first time interval:
Wherein, S characterizes the first time interval, and T characterizes the first phase of the three phase mains output that the triple line normally connects
The period of electric current, the second phase current and third phase current.
9. open phases of three-phase power source anti-phase protective device according to claim 7, which is characterized in that
The signal detection module, for determining the difference of second time interval and the first time interval, if be greater than
Otherwise preset threshold value, executes S4 if so, executing S3.
10. according to the open phases of three-phase power source anti-phase protective device any in claim 6 to 9, which is characterized in that
The signal detection module, for executing:
D1: determine that first electric signal is in the duration of same logic level state, if be greater than the three-phase electricity to be detected
At least one period of the first phase current, the second phase current and third phase current that source exports, if so, the S5 is executed, it is no
Then, D2 is executed；
D2: determine that second electric signal is in the duration of same logic level state, if it is greater than at least one described period,
If so, executing the S5；
And/or
The open phases of three-phase power source anti-phase protective device, further comprises: powering on detection module；
It is described to power on detection module, for when three phase mains to be detected powers on, determination to be connected with the three phase mains to be detected
Electric-controlled plate whether otherwise power loss if so, executing the S5, executes the S1.
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| CN201910422870.0A CN110098595B (en) | 2019-05-21 | 2019-05-21 | Open-phase and reverse-phase protection method and device for three-phase power supply |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110780126A (en) * | 2019-11-19 | 2020-02-11 | 珠海格力电器股份有限公司 | Phase sequence detection device and method and air conditioning equipment |
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| CN2708552Y (en) * | 2004-07-01 | 2005-07-06 | 深圳市和而泰电子科技有限公司 | Phase loss and anti-phase detection circuit for three-phase power source |
| CN108196137A (en) * | 2018-01-24 | 2018-06-22 | 广东志高暖通设备股份有限公司 | A kind of three-phase power detection circuit and method |
| CN109490647A (en) * | 2018-12-28 | 2019-03-19 | 常州电站辅机股份有限公司 | The detection device and method of a kind of motor drive mechanism three-phase phase sequence and phase shortage |
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| CN2708552Y (en) * | 2004-07-01 | 2005-07-06 | 深圳市和而泰电子科技有限公司 | Phase loss and anti-phase detection circuit for three-phase power source |
| CN108196137A (en) * | 2018-01-24 | 2018-06-22 | 广东志高暖通设备股份有限公司 | A kind of three-phase power detection circuit and method |
| CN109490647A (en) * | 2018-12-28 | 2019-03-19 | 常州电站辅机股份有限公司 | The detection device and method of a kind of motor drive mechanism three-phase phase sequence and phase shortage |
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