CN104991188A - Brushless motor open-phase detection device and method - Google Patents
Brushless motor open-phase detection device and method Download PDFInfo
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- CN104991188A CN104991188A CN201510417866.7A CN201510417866A CN104991188A CN 104991188 A CN104991188 A CN 104991188A CN 201510417866 A CN201510417866 A CN 201510417866A CN 104991188 A CN104991188 A CN 104991188A
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Abstract
The invention discloses a brushless motor open-phase detection device and a brushless motor open-phase detection method, which belong to the technical field of motor control. The brushless motor open-phase detection device comprises a position detection unit, a control and driving unit and a determining unit, wherein the position detection unit is used for detecting a position of a motor rotor; the control and driving unit is used for applying a driving voltage to a one-phase coil or multiphase coils of a motor according to the position of the motor rotor; and the determining unit determines whether the one-phase coil or the multiphase coils of the motor has/have an open phase according to positions of the motor rotor before and after the application of the driving voltage. The brushless motor open-phase detection method comprises the steps of: acquiring the position of the motor rotor for the first time; applying the driving voltage according to the position of the motor rotor; acquiring position of the motor rotor for the second time; and determining whether the one-phase coil or the multiphase coils of the motor has/have an open phase according to the position of the motor rotor acquired for the second time and an expected position of the motor rotor. Through the open-phase detection, the brushless motor open-phase detection device and the brushless motor open-phase detection method can reduce motor loss in the early stage, can improve reliability and safety of the motor in the using process, and prevents equipment or human life safety risk caused by problems occurred in motor operation.
Description
Technical field
The present invention relates to a kind of brushless electric machine pile defection device and method, belong 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 matters to be solved by this invention is to overcome the deficiencies in the prior art, a kind of brushless electric machine pile defection device and method 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 present invention 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, for according to motor rotor position, apply driving voltage to motor one phase or polyphase winding;
Identifying unit, 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 preferred technical solution of the present invention: described device also comprises the over-current detection unit for detecting motor whether overcurrent.
Further, as a preferred technical solution of the present invention: described over-current detection unit by resistance sampling bus current, and has compared detection with reference voltage by comparer.
Further, as a preferred technical solution of the present invention: described position detection unit obtains motor rotor position by position transducer.
Further, as a preferred technical solution of the present invention: described control and driver element increase applied driving voltage gradually, until reach the upper limit of driving voltage or successfully judge motor whether phase shortage.
The present invention also provides the detection method of a kind of base above-mentioned brushless electric machine pile defection device, and described method comprises:
First time obtains motor rotor position;
According to the motor rotor position that first time obtains, apply driving voltage to a certain phase of motor or polyphase winding, this driving voltage is determined by rotor desired location;
Second time obtains motor rotor position;
The motor rotor position obtained according to second time and rotor desired location, judge whether this phase of motor or polyphase winding exist phase shortage.
Further, as a preferred technical solution of the present invention, described method also comprises: before motor driven voltage reaches the upper limit of setting, improves motor driven voltage, until successfully judge motor coil whether phase shortage.
Further, as a preferred technical solution of the present invention, described method also comprises: detect over current of motor signal, and the motor rotor position obtained according to second time and over-current signal judge motor status.
Further, as a preferred technical solution of the present invention, described detection over current of motor signal carries out judgement to motor status and is specially:
When the motor rotor position that second time obtains is in desired location, judge that the motor coil being applied in driving voltage does not exist phase shortage;
When the motor rotor position that secondary obtains is not in desired location, if there is overcurrent, judged that motor coil was in locked rotor condition;
When the motor rotor position that secondary obtains is not in desired location, and not occurring overcurrent, there is phase shortage in a certain phase of motor or the polyphase winding that judge to be applied in driving voltage.
Further, as a preferred technical solution of the present invention, described method also comprises: after judging that motor one phase or polyphase winding exist phase shortage, determines disappearance motor phase.
The present invention 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 and method provided by the present invention, 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 embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, 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 embodiment of the present invention.
Between a kind of three-phase brushless motor region trochanterica that Fig. 2 embodiment of the present invention provides and table-drive.
The circuit diagram of the three-phase brushless motor driving power pipe that Fig. 3 provides for the embodiment of the present invention.
A kind of brushless electric machine method for detecting open phase process flow diagram that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.Should be clear and definite, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention 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, 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 example one of the present invention, for detecting in driving voltage applying process whether occurred overcurrent.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 example one of the present invention 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.
The embodiment of the present invention two provides a kind of process flow diagram of brushless electric machine method for detecting open phase, as shown in Figure 4, comprising:
Step 410, improves the driving voltage of countless voltage;
Particularly, when adopting pulse-length modulation (PWM) technology, improve the dutycycle of pwm signal;
Step 420, detects current motor rotor-position, and on a certain phase driving voltage being put on brushless electric machine or polyphase winding, by rotor, this driving voltage expects that interval position determines;
Step 430, detects the motor rotor position after applying driving voltage and over-current signal;
Step 440, motor rotor position detected by step 430, judge whether rotor is in the interval position of expection: if rotor is in the interval position of expection, judge that applying the corresponding of driving voltage does not exist phase shortage problem, the judgement of completing steps 470 subsequently mutually; Otherwise, continue to perform step 450;
Step 450, judges the upper limit whether driving voltage reaches set;
Particularly, judge whether the dutycycle of pwm signal reaches set maximal value: if driving voltage reaches the upper limit, perform step 460; Otherwise, perform step 410;
Step 460, checks overcurrent detection record, judges whether overcurrent occurred in applied driving voltage process;
Step 470, if apply, in driving process, overcurrent occurred, then judges that rotor is in locked rotor condition; Otherwise, be judged to be that a phase of applying driving voltage or polyphase winding exist phase shortage.
Said process can repeat, until obtain the phase shortage information of motor all coils; Also can repeat, but once find that namely motor phase failure stops.
Further, after said method also comprises and judges that motor one phase or polyphase winding exist phase shortage, determine the motor phase obtaining institute's phase shortage, namely after the phase or polyphase winding that are judged to apply driving voltage exist phase shortage, determine the specifying information of phase shortage, which number of phases obtaining motor there is disappearance.
Professional should recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, generally describe composition and the step of each example in the above description according to function.Use distinct methods to realize described function to each specifically should being used for, but this realization should not think the scope exceeding the embodiment of the present invention.Particularly, described computing and control section can dredging collateral logic hardware realize, and it can be use the produced logical integrated circuit of integrated circuit technology, and the present embodiment is not construed as limiting this.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only the specific embodiment of the present invention; the protection domain be not intended to limit the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
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, for according to motor rotor position, apply driving voltage to motor one phase or polyphase winding;
Identifying unit, 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 for detecting motor whether overcurrent.
3. brushless electric machine pile defection device according to claim 2, is characterized in that: described over-current detection unit by resistance sampling bus current, and has compared detection with reference voltage by comparer.
4. brushless electric machine pile defection device according to claim 1, is characterized in that: described position detection unit obtains motor rotor position by position transducer.
5. brushless electric machine pile defection device according to claim 1, is characterized in that: described control and driver element increase applied driving voltage gradually, until reach the upper limit of driving voltage or successfully judge motor whether phase shortage.
6., based on a detection method for brushless electric machine pile defection device described in claim 1, it is characterized in that, described method comprises:
First time obtains motor rotor position;
According to the motor rotor position that first time obtains, apply driving voltage to a certain phase of motor or polyphase winding, this driving voltage is determined by rotor desired location;
Second time obtains motor rotor position;
The motor rotor position obtained according to second time and rotor desired location, judge whether this phase of motor or polyphase winding exist phase shortage.
7. brushless electric machine method for detecting open phase according to claim 6, it is characterized in that, described method also comprises: before motor driven voltage reaches the upper limit of setting, improves motor driven voltage, until successfully judge motor coil whether phase shortage.
8. brushless electric machine method for detecting open phase according to claim 6, it is characterized in that, described method also comprises: detect over current of motor signal, and the motor rotor position obtained according to second time and over-current signal judge motor status.
9. brushless electric machine method for detecting open phase according to claim 8, it is characterized in that, described detection over current of motor signal carries out judgement to motor status and is specially:
When the motor rotor position that second time obtains is in desired location, judge that the motor coil being applied in driving voltage does not exist phase shortage;
When the motor rotor position that secondary obtains is not in desired location, if there is overcurrent, judged that motor coil was in locked rotor condition; When the motor rotor position that secondary obtains is not in desired location, and not occurring overcurrent, there is phase shortage in a certain phase of motor or the polyphase winding that judge to be applied in driving voltage.
10. brushless electric machine method for detecting open phase according to claim 6, it is characterized in that, described method also comprises: after judging that motor one phase or polyphase winding exist phase shortage, determines disappearance motor phase.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106249062A (en) * | 2016-08-28 | 2016-12-21 | 上海新时达电气股份有限公司 | The method for detecting open phase of a kind of three phase electric machine and system |
| CN106597205A (en) * | 2016-11-08 | 2017-04-26 | 珠海格力电器股份有限公司 | Brushless motor wiring state detection method, device and driver |
| CN106787989A (en) * | 2016-12-23 | 2017-05-31 | 深圳拓邦股份有限公司 | A kind of pile defection device and method of Brush-Less DC motor control circuit |
| CN109659903A (en) * | 2019-01-31 | 2019-04-19 | 南京信息工程大学 | A kind of switched reluctance machines stall detection method |
| CN110208612A (en) * | 2019-06-26 | 2019-09-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor phase-deficient operation detection method, device, equipment and readable storage medium storing program for executing |
| CN111366844A (en) * | 2018-12-25 | 2020-07-03 | 比亚迪股份有限公司 | Vehicle, motor drive control system, and method and device for detecting phase failure of motor |
| 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 |
| CN117491756A (en) * | 2023-12-29 | 2024-02-02 | 深圳麦格米特电气股份有限公司 | Phase failure detection method, training method of phase failure detection network model and related device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106249062A (en) * | 2016-08-28 | 2016-12-21 | 上海新时达电气股份有限公司 | The method for detecting open phase of a kind of three phase electric machine and system |
| CN106597205A (en) * | 2016-11-08 | 2017-04-26 | 珠海格力电器股份有限公司 | Brushless motor wiring state detection method, device and driver |
| CN106597205B (en) * | 2016-11-08 | 2018-12-18 | 珠海格力电器股份有限公司 | Brushless motor wiring state detection method, device and driver |
| CN106787989A (en) * | 2016-12-23 | 2017-05-31 | 深圳拓邦股份有限公司 | A kind of pile defection device and method of Brush-Less DC motor control circuit |
| CN106787989B (en) * | 2016-12-23 | 2019-06-18 | 深圳拓邦股份有限公司 | A kind of pile defection device and method of Brush-Less DC motor control circuit |
| CN111366844A (en) * | 2018-12-25 | 2020-07-03 | 比亚迪股份有限公司 | Vehicle, motor drive control system, and method and device for detecting phase failure of motor |
| CN109659903A (en) * | 2019-01-31 | 2019-04-19 | 南京信息工程大学 | A kind of switched reluctance machines stall detection method |
| CN110208612A (en) * | 2019-06-26 | 2019-09-06 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor phase-deficient operation detection method, device, equipment and readable storage medium storing program for executing |
| CN110208612B (en) * | 2019-06-26 | 2022-02-08 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor phase-failure operation detection method, device, equipment and readable storage medium |
| 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 |
| CN117491756A (en) * | 2023-12-29 | 2024-02-02 | 深圳麦格米特电气股份有限公司 | Phase failure detection method, training method of phase failure detection network model and related device |
| CN117491756B (en) * | 2023-12-29 | 2024-06-11 | 深圳麦格米特电气股份有限公司 | Phase failure detection method, training method of phase failure detection network model and related device |
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Application publication date: 20151021 |