CN104345274A - Motor rotor default phase fault simulation method and device - Google Patents
Motor rotor default phase fault simulation method and device Download PDFInfo
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- CN104345274A CN104345274A CN201410593887.XA CN201410593887A CN104345274A CN 104345274 A CN104345274 A CN 104345274A CN 201410593887 A CN201410593887 A CN 201410593887A CN 104345274 A CN104345274 A CN 104345274A
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Abstract
The invention provides a motor rotor default phase fault simulation method, which comprises the following steps that a conducting wire is connected with each phase of coil of a rotor three-phase winding and is led out to the outer part of a rotor; an external switch is respectively connected onto each conducting wire, positioned outside the rotor, of each phase of winding; one of the external switches is selected to be switched off, so the corresponding rotor winding default phase fault is generated; when all external switches are switched off, a motor operates under the normal work condition. The motor rotor default phase fault simulation method and device provided by the invention have the advantages that through special design on the structure, the motor rotor default phase fault can be really generated on the premise of not damaging the rotor, and the motor can be freely switched between the normal operation condition and the fault operation condition.
Description
Technical field
The invention belongs to Fault Analysis of Driving Motor technical field, relate to a kind of rotor open-phase fault analogy method and device, the method under the prerequisite not damaging motor, produce rotor open-phase fault, and motor can arbitrarily can switch between normal running (operation) conditions and above-mentioned failure operation condition.
Background technology
Motor is one of industrial widely used equipment, and motor is a kind of calutron realizing electric energy conversion according to the law of electromagnetic induction or transmit, and can be divided into motor and the large class of generator two.Motor is kinetic energy electric energy conversion, and generator is electric energy kinetic transformation.The malfunction analysis and problem shpoting of motor is the important content in motor use procedure.
Motor is in operational process, and can cause damage because of a variety of causes, in these faults, open-phase fault causes motor damage to occupy significant proportion, and the motor quantity of burning therefrom is huge, and the economic loss caused also is very serious.According to Electrical Motor principle, motor is when phase shortage, and what rotor windings circulated is no longer three-phase alternating current, but single-phase current, the magnetic field in air gap becomes the magnetic field of single-phase pulsating from circular rotating field.On the one hand, when motor phase failure starts, its detent torque is zero, and motor is actually and is in line to line fault state.Motor winding seriously generates heat, and destroys electrical machine insulation, so that motor damage, impact is produced, and even causes the accident.In addition, motor is when phase-deficient operation, and overload capacity obviously lowers, and revolutional slip becomes large, and stator and rotor current strengthens, and certainly will make heating in winding, and motor runs totally unfavorable.Preventing motor phase failure from running, is have very large economic worth.
Motor causes the reason of open-phase fault to mainly contain following several situation:
1. power phase shortage
Before three-phase supply access motor, this power supply is a phase or two-phase (power supply goes wrong, and the phase melt in three-phase fuse is blown) less, and it is abnormal that it can cause motor cannot start or start running.
2. control loop causes phase shortage
Contactor in control loop, relay Long-Time Service, may there is oxidation to a certain degree in contact, cause loose contact, or element movement mechanism long term wear.These electric components, when being subject to the impact of motor starting current (being generally 5-7 times of rated current), or be subject to the vibrations of electromechanical equipment or motion and block malfunctioning etc. and misoperation, rotor windings is phase shortage therefrom.
3. in motor connecting cartridge, binding post gets loose
In rotor three-phase windings, a phase winding disconnects, thus causes motor to run phase shortage.
4. link head virtual connection or disjunction
Link head in supply line occurs that virtual connection maybe may be subject to external force and disjunction, also can make phase-defect of motor.
5. insulation ag(e)ing
Motor is after the operation quite a while, the insulation of rotor windings may occur that aging (environment temperature of motor running is too high for a long time, when supply voltage is higher or load is excessive), cause the alternate or turn-to-turn short circuit of motor rotor winding, motor rotor winding also there will be a phase or heterogeneous disconnection.
In order to analyze rotor open-phase fault, need to carry out fault simulation to rotor, then failure simulation method of the prior art all can cause damage to motor, motor can not be made freely to switch under normal running (operation) conditions and above-mentioned failure operation condition simultaneously, be unfavorable for fault analysis and data acquisition.
Summary of the invention
The present invention proposes a kind of rotor open-phase fault analogy method and device, by the particular design to structure, under the prerequisite not damaging rotor, truly can produce rotor open-phase fault, the present invention can allow motor arbitrarily switch between normal running (operation) conditions and above-mentioned failure operation condition.
In order to achieve the above object, the present invention proposes a kind of rotor open-phase fault analogy method, comprises the following steps:
Connect wire at each phase coil of rotor three-phase winding and be drawn out to rotor exterior;
The wire being positioned at rotor exterior at described each phase winding connects external switch respectively;
Select the external switch disconnecting one of them, thus produce corresponding rotor windings open-phase fault;
During closed all external switches, motor operates in nominal situation.
Further, described motor is threephase asynchronous machine.
In order to achieve the above object, the present invention also proposes a kind of rotor open-phase fault analogue means, comprising:
Rotor three-phase winding;
Connect wire, be connected to each phase coil of described rotor three-phase winding and be drawn out to rotor exterior;
External switch, is connected on the connection wire of described each phase winding.
Further, described motor is threephase asynchronous machine.
Further, when one of them external switch described disconnects, corresponding rotor windings open-phase fault is produced.
Further, when described 3 external switches are all closed, motor operates in nominal situation.
The rotor open-phase fault analogy method that the present invention proposes and device, change the break-make of rotor windings by external switch, produce rotor open-phase fault.Use the method and device, rotor all can produce rotor open-phase fault at any time under constant rotational speed and change rotating speed, and can be switched to normal electrical gaseity at any time.
Accompanying drawing explanation
Figure 1 shows that the rotor open-phase fault analogue means structural representation of present pre-ferred embodiments.
Embodiment
Provide the specific embodiment of the present invention below in conjunction with accompanying drawing, but the invention is not restricted to following embodiment.According to the following describes and claims, advantages and features of the invention will be clearer.It should be noted that, accompanying drawing all adopts the form that simplifies very much and all uses non-ratio accurately, only for object that is convenient, the aid illustration embodiment of the present invention lucidly.
Please refer to Fig. 1, Figure 1 shows that the rotor open-phase fault analogue means structural representation of present pre-ferred embodiments.The present invention proposes a kind of rotor open-phase fault analogy method, comprises the following steps:
Connect wire at each phase coil of rotor three-phase winding and be drawn out to rotor exterior;
The wire being positioned at rotor exterior at described each phase winding connects external switch respectively;
Select the external switch disconnecting one of them, thus produce corresponding rotor windings open-phase fault;
During closed all external switches, motor operates in nominal situation.
Rotor open-phase fault analogy method of the present invention has carried out new design to the connected mode of rotor three-phase winding coil, each phase coil is connected with external circuit and is realized by external switch, external switch guides to rotor exterior by wire, by disconnecting or connecting the break-make that external switch realizes this phase winding.When in K1, K2 and K3, any one external switch is opened, the winding open circuit that this outside Switch Controller is answered, creates rotor windings open-phase fault.When all external switches are all closed, rotor three-phase windings is all connected, and motor operates in nominal situation.
Further, described motor is threephase asynchronous machine.
The present invention also proposes a kind of rotor open-phase fault analogue means, comprising: rotor three-phase winding 100; Connect wire 200, be connected to each phase coil of described rotor three-phase winding 100 and be drawn out to rotor exterior; External switch K1, K2, K3, be connected on the connection wire 200 of described each phase winding.
According to present pre-ferred embodiments, described motor is threephase asynchronous machine, when one of them external switch described disconnects, produces corresponding rotor windings open-phase fault, when described 3 external switches K1, K2, K3 are all closed, motor operates in nominal situation.
The rotor open-phase fault analogy method that the present invention proposes and device, change the break-make of rotor windings by external switch, produce rotor open-phase fault.Use the method and device, rotor all can produce rotor open-phase fault at any time under constant rotational speed and change rotating speed, and can be switched to normal electrical gaseity at any time.
Although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (6)
1. a rotor open-phase fault analogy method, is characterized in that, comprises the following steps:
Connect wire at each phase coil of rotor three-phase winding and be drawn out to rotor exterior;
The wire being positioned at rotor exterior at described each phase winding connects external switch respectively;
Select the external switch disconnecting one of them, thus produce corresponding rotor windings open-phase fault;
During closed all external switches, motor operates in nominal situation.
2. rotor open-phase fault analogy method according to claim 1, is characterized in that, described motor is threephase asynchronous machine.
3. a rotor open-phase fault analogue means, is characterized in that, comprising:
Rotor three-phase winding;
Connect wire, be connected to each phase coil of described rotor three-phase winding and be drawn out to rotor exterior;
External switch, is connected on the connection wire of described each phase winding.
4. rotor open-phase fault analogue means according to claim 3, is characterized in that, described motor is threephase asynchronous machine.
5. rotor open-phase fault analogue means according to claim 3, is characterized in that, when one of them external switch described disconnects, produces corresponding rotor windings open-phase fault.
6. rotor open-phase fault analogue means according to claim 3, is characterized in that, when described 3 external switches are all closed, motor operates in nominal situation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410593887.XA CN104345274A (en) | 2014-10-29 | 2014-10-29 | Motor rotor default phase fault simulation method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410593887.XA CN104345274A (en) | 2014-10-29 | 2014-10-29 | Motor rotor default phase fault simulation method and device |
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| CN104345274A true CN104345274A (en) | 2015-02-11 |
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| CN201410593887.XA Pending CN104345274A (en) | 2014-10-29 | 2014-10-29 | Motor rotor default phase fault simulation method and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553211A (en) * | 2016-01-20 | 2016-05-04 | 南京航空航天大学 | Three-stage brushless synchronous start generator structure and start control method thereof |
| CN108490351A (en) * | 2018-03-14 | 2018-09-04 | 中广核核电运营有限公司 | A kind of generator amature Multifunctional simulator, simulation system and application method |
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| US5420523A (en) * | 1992-12-04 | 1995-05-30 | Reliance Industrial Company | Apparatus and method for measuring performance parameters of electric motors |
| CN101078747A (en) * | 2007-06-29 | 2007-11-28 | 南京航空航天大学 | Double salient-pole motor drive power tube fault diagnosis method |
| JP2012154844A (en) * | 2011-01-27 | 2012-08-16 | Sanyo Denki Co Ltd | Motor condition inspection method and motor characteristic inspection apparatus |
| CN202997519U (en) * | 2012-08-29 | 2013-06-12 | 沈阳隆基电磁科技股份有限公司 | Verifying attachment of motor protector |
| CN103177640A (en) * | 2012-12-11 | 2013-06-26 | 南京化工职业技术学院 | Fault simulation assessment device of three-phase asynchronous motor |
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2014
- 2014-10-29 CN CN201410593887.XA patent/CN104345274A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5420523A (en) * | 1992-12-04 | 1995-05-30 | Reliance Industrial Company | Apparatus and method for measuring performance parameters of electric motors |
| CN101078747A (en) * | 2007-06-29 | 2007-11-28 | 南京航空航天大学 | Double salient-pole motor drive power tube fault diagnosis method |
| JP2012154844A (en) * | 2011-01-27 | 2012-08-16 | Sanyo Denki Co Ltd | Motor condition inspection method and motor characteristic inspection apparatus |
| CN202997519U (en) * | 2012-08-29 | 2013-06-12 | 沈阳隆基电磁科技股份有限公司 | Verifying attachment of motor protector |
| CN103177640A (en) * | 2012-12-11 | 2013-06-26 | 南京化工职业技术学院 | Fault simulation assessment device of three-phase asynchronous motor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553211A (en) * | 2016-01-20 | 2016-05-04 | 南京航空航天大学 | Three-stage brushless synchronous start generator structure and start control method thereof |
| CN108490351A (en) * | 2018-03-14 | 2018-09-04 | 中广核核电运营有限公司 | A kind of generator amature Multifunctional simulator, simulation system and application method |
| CN108490351B (en) * | 2018-03-14 | 2020-07-03 | 中广核核电运营有限公司 | Multifunctional simulator and simulation system for generator rotor and use method |
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Application publication date: 20150211 |