CN104698290B - A kind of method and system of motor phase failure alarm - Google Patents
A kind of method and system of motor phase failure alarm Download PDFInfo
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- CN104698290B CN104698290B CN201410705505.8A CN201410705505A CN104698290B CN 104698290 B CN104698290 B CN 104698290B CN 201410705505 A CN201410705505 A CN 201410705505A CN 104698290 B CN104698290 B CN 104698290B
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Abstract
The present invention is applied to motor alarm field there is provided the method and system that a kind of motor phase failure is alarmed, and methods described includes：Obtain the voltage signal to be detected on motor ground wire；The voltage signal to be detected and default reference voltage signal are compared, and generate level signal to be detected；Judge whether the level signal to be detected meets default microprocessor interrupt condition, interrupt response time and interruption times are obtained if meeting；Judge whether the interrupt response time and the interruption times meet default phase shortage condition, if met, carry out phase shortage alarm.The embodiment of the present invention, current signal when obtaining motor operation on ground wire, the current signal is handled, obtain the corresponding level signal of the current signal, the interruption produced by microprocessor according to the level signal judge motor whether phase shortage, and alarmed in phase shortage so that system can fast and accurately obtain the phase shortage information of motor, and timely be alarmed.
Description
Technical field
The invention belongs to the method and system of motor alarm field, more particularly to a kind of alarm of motor phase failure.
Background technology
Motor is when in single-phase non-full-phase state, and the rotor of motor is in the position of the not two-phase of phase shortage, while motor can
To run well, and the no-load performance of motor is normal, and this detection person for allowing to carry out motor phase failure detection easily produces motor not
The erroneous judgement of phase shortage..
The content of the invention
In consideration of it, the present invention provides a kind of method and system of motor phase failure alarm, to solve the easy to be right of prior art
Pile defection produces the technical problem of erroneous judgement.
The embodiment of the present invention is achieved in that a kind of method of motor phase failure alarm, the described method comprises the following steps：
Obtain the voltage signal to be detected on motor ground wire；
The voltage signal to be detected and default reference voltage signal are compared, and generate level letter to be detected
Number；
Judge whether the level signal to be detected meets default microprocessor interrupt condition, in being obtained if meeting
Disconnected response time and interruption times；
Judge whether the interrupt response time and the interruption times meet default phase shortage condition, if met,
Carry out phase shortage alarm.
The embodiment of the present invention also provides a kind of system of motor phase failure alarm, and the system includes：
Voltage signal acquiring unit to be detected, for obtaining the voltage signal to be detected on motor ground wire；
Level signal generation unit to be detected, for the electricity to be detected for obtaining the voltage signal acquiring unit to be detected
Pressure signal is compared with default reference voltage signal, and generates level signal to be detected；
Acquiring unit is interrupted, for judging that the level signal to be detected of the level signal generation unit to be detected generation is
It is no to meet default microprocessor interrupt condition, interrupt response time and interruption times are obtained if meeting；
Alarm unit, for judging whether the interrupt response time and interruption times of the interruption acquiring unit acquisition meet
Default phase shortage condition, if met, carries out phase shortage alarm.
The embodiment of the present invention, current signal when obtaining motor operation on ground wire, is handled the current signal, is obtained
The corresponding level signal of the current signal, by the level signal input microprocessor, by microprocessor according to the level signal
The interruption of generation judge motor whether phase shortage, and alarmed in phase shortage so that system can fast and accurately obtain motor
Phase shortage information, and timely alarmed.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only some of the present invention
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the flow chart of motor phase failure alarm method provided in an embodiment of the present invention；
Fig. 2 a are the oscillograms of electric current on ground wire when motor phase failure provided in an embodiment of the present invention is operated；
Fig. 2 b are the oscillograms of electric current on ground wire when motor provided in an embodiment of the present invention runs well
Fig. 3 is the structure chart of motor phase failure warning system provided in an embodiment of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
Embodiment one
As shown in Figure 1 be motor phase failure alarm method provided in an embodiment of the present invention flow chart, methods described include with
Lower step：
Step S101, obtains the voltage signal to be detected on motor ground wire.
In embodiments of the present invention, warning system obtains the voltage signal to be detected on motor ground wire first.It is described to obtain
The step of voltage signal to be detected on motor ground wire, including：
1st, the pressure drop signal to be detected that the electric current on motor ground wire is generated when by sampling resistor is obtained.
In embodiments of the present invention, the electric current on ground wire is produced during motor operation when by sampling resistor, can be produced
Pressure drop signal, the pressure drop signal is pressure drop signal to be detected, and warning system obtains the pressure drop signal to be detected.As shown in Figure 2 a
When being operated for motor phase failure provided in an embodiment of the present invention on ground wire electric current oscillogram, be as shown in Figure 2 b the embodiment of the present invention
When the motor of offer runs well on ground wire electric current oscillogram.
2nd, the pressure drop signal to be detected is converted to by voltage signal to be detected by low pass filter.
In embodiments of the present invention, the filter action of rc low pass filter is passed through, you can turn pressure drop signal to be detected
It is changed to stable voltage signal, i.e., voltage signal to be detected.
As the alternative embodiment of the present invention, the pressure drop to be detected is believed by rc low pass filter described
After the step of number being converted to voltage signal to be detected, methods described also includes：
3rd, the voltage signal to be detected is amplified by difference amplifier.
In embodiments of the present invention, if voltage signal to be detected is weaker, this can be treated by difference amplifier
Detectable voltage signals are amplified, and make the calculating of voltage signal to be detected enhancing rear just subsequent step.
Step S102, the voltage signal to be detected and default reference voltage signal are compared, and generates to be checked
Survey level signal.
In embodiments of the present invention, voltage signal to be detected is compared with the default reference voltage signal of warning system,
Level signal to be detected can be generated, the comparison procedure can be carried out by voltage comparator, wherein, reference voltage signal according to
Motor model is configured, and will not be described here.
Step S103, judges whether the level signal to be detected meets default microprocessor interrupt condition, if symbol
Close and then obtain interrupt response time and interruption times.
In embodiments of the present invention, by level signal input microprocessor to be detected, judge whether the level to be detected accords with
Close default microprocessor interrupt condition, if meeting default microprocessor interrupt condition, obtain interrupt response time and
Interruption times, wherein, microprocessor interrupt condition is set according to practical application, is not limited herein.
Step S104, judges whether the interrupt response time and the interruption times meet default phase shortage condition, such as
Fruit meets, then carries out phase shortage alarm.
In embodiments of the present invention, the interrupt response time and interruption times of acquisition are compared with default phase shortage condition
Compared with if meeting default interrupt response time and interruption times, can determine that motor phase failure, and carry out phase shortage alarm.
The embodiment of the present invention, current signal when obtaining motor operation on ground wire, is handled the current signal, is obtained
The corresponding level signal of the current signal, by the level signal input microprocessor, by microprocessor according to the level signal
The interruption of generation judge motor whether phase shortage, and alarmed in phase shortage so that system can fast and accurately obtain motor
Phase shortage information, and timely alarmed.
As the alternative embodiment of the present invention, described by the voltage signal to be detected and default reference voltage
Signal is compared, and the step of generate level signal to be detected after, judge whether the level signal to be detected meets pre-
If microprocessor interrupt condition, interrupt response time is obtained if meeting and the step of interruption times before, methods described
Also include：
Clamper is carried out to the level signal to be detected, so that the current potential of the level signal to be detected meets micro- place
Manage the potential range of device.
In embodiments of the present invention, the current potential of level signal to be detected can exceed that the follow-up microprocessor for carrying out interrupting comparison
The tolerance range of device, it is therefore desirable to clamper is carried out to level signal to be detected, so that the current potential of level signal to be detected meets institute
State the potential range of microprocessor.
Embodiment two
The mechanism map of motor phase failure warning system provided in an embodiment of the present invention is illustrated in figure 3, for convenience of description, only
The part related to the embodiment of the present invention is shown, including：
Voltage signal acquiring unit 301 to be detected, for obtaining the voltage signal to be detected on motor ground wire.
In embodiments of the present invention, the voltage signal acquiring unit 301 to be detected of warning system obtains motor ground wire first
On voltage signal to be detected.The voltage signal acquiring unit 301 to be detected, including：
Pressure drop signal to be detected obtains subelement 3011, for obtaining the electric current on motor ground wire when by sampling resistor
The pressure drop signal to be detected of generation.
In embodiments of the present invention, the electric current on ground wire is produced during motor operation when by sampling resistor, can be produced
Pressure drop signal, the pressure drop signal is pressure drop signal to be detected, and pressure drop signal to be detected obtains the acquisition of subelement 3011, and this is to be checked
Survey pressure drop signal.
Voltage signal conversion subunit 3012 to be detected, for being obtained the pressure drop signal to be detected by LPF
The pressure drop signal to be detected that subelement 3011 is obtained is converted to voltage signal to be detected.
In embodiments of the present invention, the filter action of rc low pass filter is passed through, you can turn pressure drop signal to be detected
It is changed to stable voltage signal, i.e., voltage signal to be detected.
As the alternative embodiment of the present invention, in the conversion of voltage signal conversion subunit 3012 to be detected
Afterwards, the voltage signal acquiring unit 301 to be detected also includes：
Amplify subelement 3013, for by difference amplifier to 3012 turns of the voltage signal conversion subunit to be detected
The voltage signal to be detected changed is amplified.
In embodiments of the present invention, if voltage signal to be detected is weaker, amplification subelement 3013 can then pass through difference
Point amplifier is amplified to the voltage signal to be detected, makes the calculating of voltage signal enhancing rear to be detected just subsequent step.
Level signal generation unit 302 to be detected, for treating of obtaining the voltage signal acquiring unit 301 to be detected
Detectable voltage signals are compared with default reference voltage signal, and generate level signal to be detected.
In embodiments of the present invention, level signal generation unit 302 to be detected is by voltage signal to be detected and warning system
Default reference voltage signal is compared, you can generation level signal to be detected, the comparison procedure can by voltage ratio compared with
Device is carried out, wherein, reference voltage signal is configured according to motor model, will not be described here.
Acquiring unit 303 is interrupted, for judging the level to be detected that the level signal generation unit 302 to be detected is generated
Whether signal meets default microprocessor interrupt condition, and interrupt response time and interruption times are obtained if meeting.
In embodiments of the present invention, acquiring unit 303 is interrupted by level signal input microprocessor to be detected, judges that this is treated
Whether detection level meets default microprocessor interrupt condition, if meeting default microprocessor interrupt condition, obtains
Interrupt response time and interruption times, wherein, microprocessor interrupt condition is set according to practical application, is not limited herein.
Alarm unit 304, for judge it is described interruption acquiring unit 303 obtain interrupt response time and interruption times be
It is no to meet default phase shortage condition, if met, carry out phase shortage alarm.
In embodiments of the present invention, alarm unit 304 lacks the interrupt response time and interruption times of acquisition with default
Phase condition is compared, if meeting default interrupt response time and interruption times, can determine that motor phase failure, and lacked
Mutually alarm.
The embodiment of the present invention, current signal when obtaining motor operation on ground wire, is handled the current signal, is obtained
The corresponding level signal of the current signal, by the level signal input microprocessor, by microprocessor according to the level signal
The interruption of generation judge motor whether phase shortage, and alarmed in phase shortage so that system can fast and accurately obtain motor
Phase shortage information, and timely alarmed.
It is used as the alternative embodiment of the present invention, after the level signal generation unit 302 to be detected is generated, institute
State before the interruption acquisition of acquiring unit 303, the system also includes：
Clamping unit 305, for entering to the level signal to be detected that the level signal generation unit 302 to be detected is generated
Row clamper, so that the current potential of the level signal to be detected meets the potential range of the microprocessor.
In embodiments of the present invention, the current potential of level signal to be detected can exceed that the follow-up microprocessor for carrying out interrupting comparison
The tolerance range of device, therefore clamping unit 305 can carry out clamper to level signal to be detected, so that level signal to be detected
Current potential meets the potential range of the microprocessor.
One of ordinary skill in the art will appreciate that being that the unit included by above-described embodiment two is according to function
What logic was divided, but above-mentioned division is not limited to, as long as corresponding function can be realized；In addition, each function
The specific name of unit is also only to facilitate mutually distinguish, the protection domain being not intended to limit the invention.
Those of ordinary skill in the art are further appreciated that all or part of step realized in above-described embodiment method is can
To instruct the hardware of correlation to complete by program, described program can be stored in a computer read/write memory medium
In, described storage medium, including ROM/RAM, disk, CD etc..
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (7)
1. a kind of method of motor phase failure alarm, it is characterised in that the described method comprises the following steps：
Pressure drop signal to be detected is formed after obtaining the electric current on motor ground wire, sampled resistance, pressure drop signal to be detected is through low pass
The voltage signal to be detected formed after filtering；
The voltage signal to be detected and default reference voltage signal are compared, and generate level signal to be detected；
Judge whether the level signal to be detected meets default microprocessor interrupt condition, obtain to interrupt if meeting and ring
Between seasonable and interruption times；
Judge whether the interrupt response time and the interruption times meet default phase shortage condition, if met, carry out
Phase shortage is alarmed.
2. the method as described in claim 1, it is characterised in that the electric current on the acquisition motor ground wire, sampled resistance
After form pressure drop signal to be detected, the step of the voltage signal to be detected formed after pressure drop signal to be detected is low-pass filtered it
Afterwards, methods described also includes：The voltage signal to be detected is amplified by difference amplifier.
3. method as claimed in claim 1 or 2, it is characterised in that it is described by the voltage signal to be detected with it is default
Reference voltage signal is compared, and the step of generate level signal to be detected after, judge that the level signal to be detected is
It is no to meet default microprocessor interrupt condition, before the step of interrupt response time and interruption times are obtained if meeting,
Methods described also includes：Clamper is carried out to the level signal to be detected, so that the current potential of the level signal to be detected meets
The potential range of the microprocessor.
4. a kind of system of motor phase failure alarm, it is characterised in that the system includes：
Voltage signal acquiring unit to be detected, for obtaining the voltage signal to be detected on motor ground wire；
Level signal generation unit to be detected, the voltage to be detected for the voltage signal acquiring unit to be detected to be obtained is believed
Number it is compared with default reference voltage signal, and generates level signal to be detected；
Acquiring unit is interrupted, for judging whether the level signal to be detected of the level signal generation unit generation to be detected accords with
Default microprocessor interrupt condition is closed, interrupt response time and interruption times are obtained if meeting；
Alarm unit, for judging whether the interrupt response time and interruption times of the interruption acquiring unit acquisition meet default
Phase shortage condition, if met, carry out phase shortage alarm.
5. system as claimed in claim 4, it is characterised in that the voltage signal acquiring unit to be detected, including：
Pressure drop signal to be detected obtains subelement, for treating of obtaining that the electric current on motor ground wire generates when by sampling resistor
Detect pressure drop signal；
Voltage signal conversion subunit to be detected, is obtained for the pressure drop signal to be detected to be obtained into subelement by LPF
The pressure drop signal to be detected taken is converted to voltage signal to be detected.
6. system as claimed in claim 5, it is characterised in that change it in the voltage signal conversion subunit to be detected
Afterwards, the voltage signal acquiring unit to be detected also includes：
Amplify subelement, for the electricity to be detected changed by difference amplifier to the voltage signal conversion subunit to be detected
Pressure signal is amplified.
7. the system as described in any one of claim 4 to 6, it is characterised in that in the level signal generation unit to be detected
After generation, before the interruption acquiring unit is obtained, the system also includes：Clamping unit, for the electricity to be detected
The level signal to be detected of ordinary mail generation unit generation carries out clamper, so that the current potential of the level signal to be detected meets institute
State the potential range of microprocessor.
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| CN201410705505.8A CN104698290B (en) | 2014-11-27 | 2014-11-27 | A kind of method and system of motor phase failure alarm |
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| CN201410705505.8A CN104698290B (en) | 2014-11-27 | 2014-11-27 | A kind of method and system of motor phase failure alarm |
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| CN104698290B true CN104698290B (en) | 2017-09-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105467266B (en) * | 2016-01-25 | 2018-09-07 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of detection method and detection device of machine winding broken string |
| CN106226607A (en) * | 2016-08-30 | 2016-12-14 | 广东威灵电机制造有限公司 | The fault detection method of brshless DC motor and device |
| CN109444559B (en) * | 2018-10-26 | 2021-02-05 | 苏州瑞迈斯医疗科技有限公司 | Pulse signal sampling method, pulse signal reconstruction method and pulse signal reconstruction device |
| CN112462156A (en) * | 2020-12-16 | 2021-03-09 | 广东电网有限责任公司 | Three-phase open-phase early warning method, device, system, equipment and storage medium |
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| CN2457776Y (en) * | 2000-03-28 | 2001-10-31 | 黄玠 | Phase lost controller for three phase AC motor |
| US20030110614A1 (en) * | 2001-12-13 | 2003-06-19 | Pitney Bowes Incorporated | Method for determining correct phasing of a three-phase brushless DC motor |
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| CN201656443U (en) * | 2010-03-29 | 2010-11-24 | 卧龙电气集团股份有限公司 | Vibrating motor set frequency control lack-phase overload protection device |
| CN203587771U (en) * | 2013-10-15 | 2014-05-07 | 武汉钢铁(集团)公司 | Three-phase asynchronous motor electrical failure detecting apparatus |
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| JP3671770B2 (en) * | 1999-10-07 | 2005-07-13 | トヨタ自動車株式会社 | Fault detection method of current sensor using three-phase alternating current equilibrium detection method |
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|---|---|---|---|---|
| CN2457776Y (en) * | 2000-03-28 | 2001-10-31 | 黄玠 | Phase lost controller for three phase AC motor |
| US20030110614A1 (en) * | 2001-12-13 | 2003-06-19 | Pitney Bowes Incorporated | Method for determining correct phasing of a three-phase brushless DC motor |
| CN1455263A (en) * | 2003-01-17 | 2003-11-12 | 艾默生网络能源有限公司 | Open-phase detecting method and open-phase detecting circuit applying for three-phase four-line input equipment |
| CN201656443U (en) * | 2010-03-29 | 2010-11-24 | 卧龙电气集团股份有限公司 | Vibrating motor set frequency control lack-phase overload protection device |
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Address after: 312300 economic development zone, Shangyu District, Zhejiang, Shaoxing Co-patentee after: ZHEJIANG WOLONG HOUSEHOLD ELECTRIC MACHINERY Co.,Ltd. Patentee after: WOLONG ELECTRIC GROUP Co.,Ltd. Address before: 312300 No. 1801 Renmin West Road, Shaoxing, Zhejiang, Shangyu Co-patentee before: ZHEJIANG WOLONG HOUSEHOLD ELECTRIC MACHINERY Co.,Ltd. Patentee before: WOLONG ELECTRIC GROUP Co.,Ltd. |
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Effective date of registration: 20190916 Address after: 312300 economic development zone, Shangyu District, Zhejiang, Shaoxing Patentee after: WOLONG ELECTRIC GROUP Co.,Ltd. Address before: 312300 economic development zone, Shangyu District, Zhejiang, Shaoxing Co-patentee before: ZHEJIANG WOLONG HOUSEHOLD ELECTRIC MACHINERY Co.,Ltd. Patentee before: WOLONG ELECTRIC GROUP Co.,Ltd. |
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