CN204789944U - Brushless motor lacks looks detection device - Google Patents
Brushless motor lacks looks detection device Download PDFInfo
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- CN204789944U CN204789944U CN201520515854.3U CN201520515854U CN204789944U CN 204789944 U CN204789944 U CN 204789944U CN 201520515854 U CN201520515854 U CN 201520515854U CN 204789944 U CN204789944 U CN 204789944U
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Abstract
The utility model discloses a brushless motor lacks looks detection device belongs to the technical field of electric machine control, and the device includes: position detecting element for detect the electric motor rotor position, control and drive unit link to each other with position detecting element for according to the electric motor rotor position, apply driving voltage to motor looks or polyphase winding, judge the unit, link to each other respectively with drive unit with position detecting element, control for according to applying driving voltage electric motor rotor position from beginning to end, judge whether these looks of motor or polyphase winding exist scarce looks. The utility model discloses a lack and inspect mutually, can reduce the motor in early days, also can improve reliability and security in the motor use, avoid equipment or human life safety because of the motor operation goes wrong and causes.
Description
Technical field
The utility model relates to a kind of brushless electric machine pile defection device, belongs to the technical field of Electric Machine Control.
Background technology
Brushless electric machine alternately applies driving voltage by electronics commutation device in each phase coil of motor, thus realizes forming rotating magnetic field at motor internal, and then pushing motor rotor rotates.Brushless electric machine can be single-phase, two-phase, three-phase or heterogeneous, no matter but its number, once occur phase shortage, the running of motor all will be subject to great impact.This impact can be to start, or occurs rotating speed fluctuation or intense vibration in operation process.In any case phase shortage all can jeopardize terminal device or even human life safety.Judge motor phase failure situation in time early, the loss in motor production run can be avoided, and the various dangerous situations occurred in motor operation course.
At present, motor phase failure being detected and has current detecting mode, by detecting quality of balance between current waveform and size, polyphase current or the fluctuation of speed etc., motor phase failure information can be obtained under certain condition.But these modes have more requirement to testing circuit and computing unit, loaded down with trivial details, the inconvenient actual use of process, when especially producing inspection.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of brushless electric machine pile defection device is provided, solve existing motor phase failure testing process to testing circuit and computing unit requirement high, process is loaded down with trivial details, the inconvenient actual problem used.
The utility model specifically solves the problems of the technologies described above by the following technical solutions:
A kind of brushless electric machine pile defection device, described device comprises:
Position detection unit, for detecting motor rotor position;
Control and driver element, be connected with position detection unit, for according to motor rotor position, apply driving voltage to motor one phase or polyphase winding;
Identifying unit, with position detection unit, controls to be connected respectively with driver element, for according to motor rotor position before and after applying driving voltage, judges whether this phase of motor or polyphase winding exist phase shortage.
Further, as a kind of optimal technical scheme of the present utility model: described device also comprises the over-current detection unit be connected with identifying unit, for detecting motor whether overcurrent.
Further, as a kind of optimal technical scheme of the present utility model: described over-current detection unit comprises resistance and comparer, described resistance is connected with comparer.
Further, as a kind of optimal technical scheme of the present utility model: described position detection unit adopts position transducer to obtain motor rotor position.
The utility model adopts technique scheme, can produce following technique effect:
According to motor rotor position before and after applying driving voltage, brushless electric machine pile defection device provided by the utility model, by applying driving voltage to a certain phase of motor or polyphase winding, judges whether motor exists phase shortage in this phase or polyphase winding.Checked by phase shortage, motor can be reduced in early days, especially the production loss of Full-plastics sealed motor, also can improve the reliability in motor use procedure and security, avoid the equipment that causes because motor rotation goes wrong or human life safety.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
A kind of brushless electric machine pile defection structure drawing of device that Fig. 1 provides for the utility model embodiment.
Between a kind of three-phase brushless motor region trochanterica that Fig. 2 the utility model embodiment provides and table-drive.
The circuit diagram of the three-phase brushless motor driving power pipe that Fig. 3 provides for the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described in detail.Should be clear and definite, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The utility model embodiment one provides a kind of block diagram of brushless electric machine pile defection device, and as shown in Figure 1, described device comprises: identifying unit 110, over-current detection unit 120, position detection unit 130, controls and driver element 140 and brushless electric machine 150.Wherein, control to be connected with position detection unit 130 with driver element 140, and position detection unit 130, control to be connected with identifying unit 110 respectively with driver element 140, over-current detection unit 120.
Control to apply driving voltage with driver element 140 to a certain phase of brushless electric machine 150 or polyphase winding, rotor is rotated to desired location by current location rotation; Motor rotor position is detected twice in position detection unit 130 is applying driving voltage front and back to a certain phase of motor or polyphase winding; Identifying unit 110, according to motor rotor position before and after applying driving voltage, judges motor whether phase shortage.It is pointed out that to brushless electric machine 150 which mutually or polyphase winding apply driving voltage and determine according to rotor current location and desired location.Described position detection unit 130 obtains motor rotor position preferably by position transducer.
For three-phase brushless dc motor, Fig. 2 gives rotor interval and table-drive, and Fig. 3 gives the circuit diagram of driving power pipe.As shown in Figure 2, according to three road hall signal HU, HV and HW, rotor interval division is 6 intervals such as 101,100,110,010,011 and 001, when the conducting of power tube and the corresponding relation of current interval are according to when performing shown in showing, rotor is by according to turning to rotation shown in the hall signal of Tu2Zhong tri-road.
In pile defection process, the applying of driving voltage and phase shortage judge can according to the table-drive in Fig. 2.Such as, when rotor current interval is 101, conducting T2 and T4 power tube, obtain making motor the moment of torsion its rotor being turned to 100 intervals; After conducting T2 and T4 power tube, detect motor rotor position, if interval residing for it is 100, then there is not phase shortage in motor U and V phase coil; Otherwise motor U and V phase coil have at least a phase coil to there is phase shortage.
Further, applied driving voltage should be made enough large, the moment of torsion obtained when there is not phase shortage problem to make the corresponding coil of motor enough overcomes rotor inertia.Driving voltage progressively can improve, to guarantee that its magnitude of voltage is enough large being no more than in the set upper limit.
Further, in indefinite situation, testing process should be able to distinguish stall and these two kinds of abnormality of phase shortage.After applying enough large driving voltage, if rotor is not when expecting interval, is likely that rotor is lockable, namely stall occurs.For distinguishing stall and phase shortage, add over-current detection unit 120 in the utility model example one, for detecting in driving voltage applying process whether occurred overcurrent.Preferably, described over-current detection unit 120 comprises resistance and comparer, and described resistance is connected with comparer, and this over-current detection unit 120 by resistance sampling bus current, and has compared detection with reference voltage by comparer; When rotor is not when expecting interval, if overcurrent did not appear in clock in the process of driving voltage applying, then judged that corresponding coil existed phase shortage; Otherwise, judge that motor is in stall.
Although it should be noted that the utility model example one comprises over-current detection unit 120, when stall possibility clearly can be got rid of, over-current detection unit 120 can not be used.
In addition, brushless electric machine 150 can be single-phase, two-phase, three-phase or polyphase machine.
Professional should recognize further, in conjunction with the unit of each example that embodiment disclosed herein describes, can realize with electronic hardware module, generally describe composition and the annexation of each example in the above description according to function.Particularly, the computing of described electronic hardware module and control section can dredging collateral logic hardware realize, and it can be use the produced logical integrated circuit of existing integrated circuit technology, and the present embodiment is not construed as limiting this.
Further, in the utility model, all adopt electronic hardware module, utilize technology for detection commonly known in the art, transmission and contrast.Electronic hardware module is not made improvements itself, also do not also have specific method flow.The correlation module related in the utility model and the function of realization thereof be hardware after improvement and formation thereof device on carry computer software programs conventional in prior art or pertinent protocols just can realize, be not that computer software programs of the prior art or pertinent protocols are improved.Innovation of the present utility model is the improvement of hardware module in prior art and connects syntagmatic, but not be in hardware module for realizing the improvement of software or the agreement of carrying about function.
Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; be understood that; the foregoing is only embodiment of the present utility model; and be not used in restriction protection domain of the present utility model; all within spirit of the present utility model and principle, any amendment made, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (4)
1. a brushless electric machine pile defection device, is characterized in that, described device comprises:
Position detection unit, for detecting motor rotor position;
Control and driver element, be connected with position detection unit, for according to motor rotor position, apply driving voltage to motor one phase or polyphase winding;
Identifying unit, with position detection unit, controls to be connected respectively with driver element, for according to motor rotor position before and after applying driving voltage, judges whether this phase of motor or polyphase winding exist phase shortage.
2. brushless electric machine pile defection device according to claim 1, is characterized in that: described device also comprises the over-current detection unit be connected with identifying unit, for detecting motor whether overcurrent.
3. brushless electric machine pile defection device according to claim 2, it is characterized in that: described over-current detection unit comprises resistance and comparer, described resistance is connected with comparer.
4. brushless electric machine pile defection device according to claim 1, is characterized in that: described position detection unit adopts position transducer to obtain motor rotor position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520515854.3U CN204789944U (en) | 2015-07-16 | 2015-07-16 | Brushless motor lacks looks detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520515854.3U CN204789944U (en) | 2015-07-16 | 2015-07-16 | Brushless motor lacks looks detection device |
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| CN204789944U true CN204789944U (en) | 2015-11-18 |
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| CN201520515854.3U Expired - Fee Related CN204789944U (en) | 2015-07-16 | 2015-07-16 | Brushless motor lacks looks detection device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253781A (en) * | 2016-07-25 | 2016-12-21 | 南京信息职业技术学院 | Switched reluctance motor position estimation method with open-phase fault-tolerant function |
| CN112067911A (en) * | 2020-08-25 | 2020-12-11 | 宁波拓邦智能控制有限公司 | Phase-loss detection method and device for brushless direct current motor |
-
2015
- 2015-07-16 CN CN201520515854.3U patent/CN204789944U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253781A (en) * | 2016-07-25 | 2016-12-21 | 南京信息职业技术学院 | Switched reluctance motor position estimation method with open-phase fault-tolerant function |
| CN112067911A (en) * | 2020-08-25 | 2020-12-11 | 宁波拓邦智能控制有限公司 | Phase-loss detection method and device for brushless direct current motor |
| CN112067911B (en) * | 2020-08-25 | 2023-03-10 | 宁波拓邦智能控制有限公司 | Phase-loss detection method and device for brushless direct current motor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160224 Address after: 214500, No. 68-10, Third Ring Road, Chengbei Park, Jingjiang Economic Development Zone, Taizhou, Jiangsu, Jingjiang Patentee after: JIANGSU JIXIANG AIR CONDITIONING EQUIPMENT Co.,Ltd. Address before: 702, room 210011, block A, No. 611, Gulou, Nanjing, Zhongshan North Road, Jiangsu Patentee before: Zhou Haibo |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 |