CN202713106U - External rotor type permanent magnet motor provided with rotor position sensor and servo motor system - Google Patents
External rotor type permanent magnet motor provided with rotor position sensor and servo motor system Download PDFInfo
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- CN202713106U CN202713106U CN201220314724XU CN201220314724U CN202713106U CN 202713106 U CN202713106 U CN 202713106U CN 201220314724X U CN201220314724X U CN 201220314724XU CN 201220314724 U CN201220314724 U CN 201220314724U CN 202713106 U CN202713106 U CN 202713106U
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Abstract
The utility model discloses an external rotor type permanent magnet motor provided with a rotor position sensor and a servo motor system. The motor comprises 4N sensor windings used for the position detection, and the N is an integer greater than zero. At least 4N salient poles of a stator are respectively provided with the sensor windings in a winded manner. The 4N sensor windings can be divided into two groups, each of the sensor windings can be divided into an upper segment winding and a lower segment winding. The upper segment windings are in a serial connection, and the lower segment windings are in a serial connection. The fundamental wave phase difference between the fundamental wave phase of the combined inductance of the serially connected upper segment windings and the fundamental wave phase of the combined inductance of the serially connected lower segment windings is 180degrees, and the above mentioned two fundamental wave phases are in a serial connection. The fundamental wave phase difference between each two fundamental wave phases of the inductances of the upper segment windings of the two windings is 90degrees, and the two sensor windings are in a parallel connection, besides, the parallel connection point is an excitation signal input end. The serial connection point of each of the upper segment windings and each of the lower segment windings of the two sensor windings is a position signal output end. By using the servo motor, the rotating angle detection under the high temperature, high vibration environment can be realized.
Description
Technical field
The utility model relates to the rotor position angle detection technique of servomotor, is specifically related to the detection technique of outer-rotor type permanent magnet machine rotor position.
Background technology
Mainly utilize the mode of optical encoder or resolver to detect to the rotor position angle detection of servomotor at present, this dual mode all exists defective and deficiency in the application of reality:
1, optical encoder mode: this mode need to be installed in optical encoder on the rear over glaze of motor, detects in order to realize rotor angle.But optical encoder is owing to use the formations such as optics and semiconductor device, semiconductor element lifetime poor reliability when using under hot environment.Simultaneously, when the strong vibration occasion was used, optics damaged, causes measuring ability to lose efficacy easily.And because motor rear end is equipped with encoder, be difficult to realize the slimming of motor.
2, resolver mode: this mode need to be installed in resolver on the rear over glaze of motor, realizes that with this rotor angle detects.But resolver has 6 lead-in wires that wiring is increased, and need to be installed in the rear portion of motor, is difficult to realize the slimming of motor.
The utility model content
The utility model detects existing problem for the rotor position angle of existing servomotor, and a kind of outer-rotor type magneto with rotor-position sensor is provided.This servomotor can be realized the roll angle inspection under high temperature, the high vibration environment, and reduces the wiring number, and reliability is higher.
Based on this servomotor, the utility model also provides and utilizes the utility model motor roll angle inspection principle to consist of the servomotor system simultaneously.
In order to achieve the above object, the utility model adopts following technical scheme:
Outer-rotor type magneto with rotor-position sensor, comprise rotor and stator, described rotor is placed in the stator outside, described magneto also comprises 4N the transducer winding of using as position probing, wherein N is＞0 integer, have at least 4N the prominent utmost point to be wound with respectively the transducer winding in the described stator, described 4N transducer winding is divided into 2 groups, every group transducer winding is divided into epimere winding and hypomere winding, each windings in series of epimere connects, each windings in series of hypomere connects, the fundamental phase of the combination inductance after every group of epimere windings in series and the fundamental phase of the combination inductance after the hypomere windings in series differ 180 degree and are one another in series, the fundamental phase of each epimere winding inductance of 2 groups of windings differs 90 degree each other, and 2 groups of transducer windings are in parallel, and itself and interface are the excitation signal input; Each epimere winding of 2 groups of windings is the output of position signalling with the contact of connecting of lower end winding.
In the preferred embodiment of magneto, described magneto also comprises 3K as the torque winding that produces electromagnetic torque, wherein K is＞0 integer, be not wound with the transducer winding on the described stator prominent extremely in, at least 3 prominent extremely going up are wound with respectively the torque winding, and described 3K torque winding is divided into 3 groups, every group the number of windings 〉=1, the back-emf of 3 groups of torque windings differs 120 degree electrical degrees each other, joins with three-phase star or triangle.
Further, described rotor is made of permanent-magnet steel, soft magnetic material yoke and rotating shaft, and described rotor magnetic pole is along the rotor outer circle surface or embed evenly distribution in the rotor, and alternating polarity is arranged, and the permanent-magnet pole logarithm is the integer of P 〉=2, and described magnet steel is tile-type or annular.
Further, the prominent utmost point on the described stator is along the radial distribution of stator inner circle, and each prominent utmost point shape is not necessarily identical.
Utilize the utility model motor roll angle inspection principle to consist of the servomotor system, it comprises:
The outer-rotor type magneto with rotor-position sensor, excitation signal and position signalling processing unit and control circuit and power amplifier unit based on such scheme formation, described magneto output shaft connects control object, and excitation signal input and the position signalling output of the transducer winding of excitation signal and position signalling processing unit and magneto join;
Excitation signal and position signalling processing unit join with control circuit and power amplifier unit;
Control circuit and power amplifier unit controls connect magneto.
Outer-rotor type magneto based on such scheme forms need not to use optical encoder and resolver, by rotor angle measuring ability winding is set in motor, and the new construction motor that roll angle inspection function and motor torque function are integrated in one.
Because motor internal does not have semiconductor and optics, with the optical encoder ratio, it can realize roll angle inspection under the high vibration environment of high temperature, can consist of the higher servo system of reliability; Putting english with the motor rear portion becomes or coder structure is compared, and can realize the servomotor that axial length is extremely short.
In the utility model, the detection position is compared with 6 that revolve change with lead-in wire, reduces two, and distribution reduces Reliability Enhancement.
The utility model can be applicable to servo-control mechanism and the system of the high temperature such as Industry Control, robot, Aero-Space, battlebus and strong vibration environment, and the ultrathin servo electrical machinery system of low inertia.
Description of drawings
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 is P=5 in this example, and N=1, the prominent number of poles of torque are the structural representation of stator in 12 o'clock the electric machine structure;
Fig. 2 is P=5 in this example, N=1, and the prominent number of poles of torque is the structural representation of 12 o'clock electric machine structure rotor;
Fig. 3 is the equivalent circuit diagram that stator upper sensor winding connects in the example shown in Figure 1;
Fig. 4 is corresponding potential vector figure in the example shown in Figure 1;
Fig. 5 is that angle position detects principle of compositionality figure;
Fig. 6 is the servomotor system.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
The outer-rotor type magneto that the utility model provides, namely rotor is at the magneto of stator outside, and it mainly comprises rotor and stator.
Referring to Fig. 2, rotor 100 is by permanent-magnet steel 101, and soft magnetic material yoke 102 and rotating shaft 103 consist of.Rotor magnetic pole evenly distributes along rotor outer circle surface (or embedding in the rotor), and alternating polarity is arranged, and magnet steel is tile-type or annular, and the permanent-magnet pole logarithm is the integer of P 〉=2.
Referring to Fig. 1, stator 200 is made of the soft magnetic material such as silicon steel sheet and coil, and stator has the prominent utmost point, and the prominent utmost point is along the radial distribution of stator inner circle, and each prominent utmost point shape is not necessarily identical.
In order to realize the detection of motor corner, the utility model is wound with 4N transducer winding and 3K torque winding as the generation electromagnetic torque of using as position probing at the stator of motor, and wherein N, K are＞0 integer.
In said stator, have at least 4N the prominent utmost point to be wound with respectively the transducer winding of using as position probing, here N is the integer greater than 0, above-mentioned 4N transducer winding is divided into 2 groups, every group transducer winding is divided into epimere winding and hypomere winding, each windings in series of epimere connects, each windings in series of hypomere connects, the fundamental phase of the combination inductance after every group of epimere windings in series and the fundamental phase of the combination inductance after the hypomere windings in series differ 180 degree and are one another in series, the fundamental phase of each epimere winding inductance of 2 groups of windings differs 90 degree each other, 2 groups of transducer windings are in parallel, itself and interface are the excitation signal input, and each epimere winding of 2 groups of windings is the output of position signalling with the contact of connecting of lower end winding.
All the other not around the transducer winding prominent extremely in, have at least 3 prominent to be wound with as the torque winding that produces electromagnetic torque on extremely, these torque windings are divided into 3 groups, and every group the number of windings is more than or equal to 1, the back-emf of 3 groups of windings differs 120 degree electrical degrees each other, is connected into three-phase star or triangle.
Based on such scheme, implementation of the present utility model is as follows:
As an example, this example is with P=5, and N=1, the prominent number of poles of torque are that 12 outer-rotor type magneto describes.
Referring to Fig. 1, be wound with 4N transducer winding at stator altogether in this example, N=1, i.e. 4 transducer windings.Concrete winding method is not given unnecessary details as mentioned above herein.
The transducer winding of coiling thus, its inductance characteristic is as follows:
Fig. 3 is 4 equivalent circuit diagrams after the transducer winding technique, and wherein L1, L2, L3, L4 are the transducer winding, are connected to each other to bridge circuit.
Inductance L 1, L2, L3, L4 are with rotor angle
mVariation be respectively
L1=L0+Lmsin(10θ
m) (1)
L2=L0+Lmsin(10θ
m-180) (2)
L3=L0+Lmcos(10θ
m) (3)
L4=L0+Lmcos(10θ
m-180) (4)
Wherein L0 is that DC component, the Lm of inductance are the fundametal compoment of inductance.
In this example, be provided with 12 torque windings, be respectively T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, according to the coiling requirement of torque winding, these 12 torque windings are divided into 3 groups (as shown in Figure 4):
The 1st group is made of T1, T4, T7, T10 winding, their back-emf same-phase, and the connection that is one another in series consists of U phase electromotive force Vu.
The 2nd group is made of T2, T5, T8, T11 winding, their back-emf same-phase, and the connection that is one another in series consists of V phase electromotive force Vv.
The 3rd group is made of T3, T6, T9, T12 winding, their back-emf same-phase, and the connection that is one another in series consists of W phase electromotive force Vw.
The phase place of above-mentioned U, V, W phase electromotive force each other phase phasic difference 120 degree, consist of 3 symmetrical permanent magnet AC motor systems, concrete potential vector figure is as shown in Figure 4.
Based on the said motor structure, its rotor angle testing process is as follows:
As shown in Figure 3,4 transducer windings are connected to each other in the bridge circuit, and the X1-X2 end is the excitation signal input, and the Y1-Y2 end is the output of position signalling.
Referring to Fig. 5, when detecting, it is high frequency field power supply e more than several thousand Hz that X1-X2 is terminated to frequency, and the signal voltage of the Y1-Y2 end of bridge circuit is received position signalling processing unit 300, through position units process 300 can the angular position theta to rotor
m
Wherein, high frequency field power supply e will supply high-frequency ac or high-frequency impulse as excitation signal for the X1-X2 end provides.
In this example, as an example, with excitation signal voltage e=e
mSin (ω t), (e wherein
mBe the amplitude of excitation signal voltage, ω is the angular frequency of excitation signal, and t is the time) process of position probing is described.
But because the impact of frequency high negligible resistance, the utility model utilizes formula (1), (2), (3), (4) by simply can be calculated the position signalling V of transducer winding output
12And V
34:
Wherein L0 is the DC component of inductance, and Lm is the fundametal compoment of inductance, e
mAmplitude for excitation signal voltage.
Can get rotor angle according to formula (5), (6)
m:
Hence one can see that, with the output signal V of bridge circuit
12And V
34Be input to position signalling processing unit 300, both can obtain rotor position angle θ after the arctangent cp cp operation of utilizing common analog or Digital Signal Processing mode to carry out formula (7) is processed in the signal processing unit of position
m
The magneto that forms thus, it need not to use optical encoder and resolver, by rotor angle measuring ability winding is set in motor, the new construction motor that roll angle inspection function and motor torque function are integrated in one.
Moreover its detection position for as the X1-X2 end of input and the Y1-Y2 end of output, only needs four with lead-in wire, compares with 6 that revolve change, reduces two, and distribution reduces Reliability Enhancement.
Referring to Fig. 5, it is depicted as and utilizes the utility model motor roll angle inspection principle to consist of the servomotor system, motor 400 output shafts connect control object 500 in this system, produce the transducer winding line end X1-X2 that excitation signal e supplies with motor, the output signal V of transducer winding by excitation signal and position signalling processing unit 300
12And V
34Be input to excitation signal and position signalling processing unit 300 through the Y1-Y2 line end.
In excitation signal and position signalling processing unit 300, utilize formula (7) signal to be processed the rotor position angle θ that obtains motor
mAnd export to control circuit and power amplifier unit 600.
In control circuit and power amplifier unit 600, control circuit compares operating instruction and rotor angle information, utilization comes the voltage of regulating electric machine or electric current that above-mentioned deviate is reduced to the control laws such as proportion integration differentiation of deviate, and the realization control object is followed the operation of operating instruction.
Wherein the position signalling processing unit can be made of analog circuit, also it can be carried out being made of digital circuits such as single-chip microcomputer or DSP after the A/D conversion.
More than show and described basic principle of the present utility model, principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. the outer-rotor type magneto that has rotor-position sensor, comprise rotor and stator, described rotor is placed in the stator outside, it is characterized in that, described magneto also comprises 4N the transducer winding of using as position probing, wherein N is＞0 integer, have at least 4N the prominent utmost point to be wound with respectively the transducer winding in the described stator, described 4N transducer winding is divided into 2 groups, every group transducer winding is divided into epimere winding and hypomere winding, each windings in series of epimere connects, each windings in series of hypomere connects, and the fundamental phase of the combination inductance after every group of epimere windings in series differs 180 degree with the fundamental phase of the combination inductance after the hypomere windings in series and is one another in series, and the fundamental phase of each epimere winding inductance of 2 groups of windings differs each other 90 and spends, 2 groups of transducer windings are in parallel, and itself and interface are the excitation signal input; Each epimere winding of 2 groups of windings is the output of position signalling with the contact of connecting of lower end winding.
2. the outer-rotor type magneto with rotor-position sensor according to claim 1, it is characterized in that, described magneto also comprises 3K as the torque winding that produces electromagnetic torque, wherein K is＞0 integer, be not wound with the transducer winding on the described stator prominent extremely in, at least 3 prominent extremely going up are wound with respectively the torque winding, described 3K torque winding is divided into 3 groups, every group the number of windings 〉=1, the back-emf of 3 groups of torque windings differs 120 degree electrical degrees each other, joins with three-phase star or triangle.
3. the outer-rotor type magneto with rotor-position sensor according to claim 1, it is characterized in that, described rotor is made of permanent-magnet steel, soft magnetic material yoke and rotating shaft, described rotor magnetic pole is along evenly distributing in rotor outer circle surface or the embedding rotor, alternating polarity is arranged, the permanent-magnet pole logarithm is the integer of P 〉=2, and described magnet steel is tile-type or annular.
4. the outer-rotor type magneto with rotor-position sensor according to claim 1 and 2 is characterized in that, the prominent utmost point on the described stator is along the radial distribution of stator inner circle, and each prominent utmost point shape is not necessarily identical.
5. servomotor system, it is characterized in that, described system comprises: each described outer-rotor type magneto, excitation signal and position signalling processing unit and control circuit and power amplifier unit with rotor-position sensor in the claim 1 to 4, described magneto output shaft connects control object, and excitation signal input and the position signalling output of the transducer winding of excitation signal and position signalling processing unit and magneto join;
Excitation signal and position signalling processing unit join with control circuit and power amplifier unit;
Control circuit and power amplifier unit controls connect magneto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220314724XU CN202713106U (en) | 2012-06-29 | 2012-06-29 | External rotor type permanent magnet motor provided with rotor position sensor and servo motor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220314724XU CN202713106U (en) | 2012-06-29 | 2012-06-29 | External rotor type permanent magnet motor provided with rotor position sensor and servo motor system |
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| Publication Number | Publication Date |
|---|---|
| CN202713106U true CN202713106U (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220314724XU Withdrawn - After Issue CN202713106U (en) | 2012-06-29 | 2012-06-29 | External rotor type permanent magnet motor provided with rotor position sensor and servo motor system |
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| CN (1) | CN202713106U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516167A (en) * | 2012-06-29 | 2014-01-15 | 上海博建电子科技有限公司 | Inner rotor type permanent magnet motor with rotor position sensor, method for detecting rotor position and servo motor system |
| CN103516166A (en) * | 2012-06-29 | 2014-01-15 | 上海博建电子科技有限公司 | Outer rotor type permanent magnet motor with rotor position sensor, method for detecting rotor position and servo motor system |
| CN105469966A (en) * | 2016-01-12 | 2016-04-06 | 上海吉亿电机有限公司 | Rotary transformer |
| WO2018228250A1 (en) * | 2017-06-15 | 2018-12-20 | 新疆金风科技股份有限公司 | Motor rotation angle measurement device and method |
-
2012
- 2012-06-29 CN CN201220314724XU patent/CN202713106U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516167A (en) * | 2012-06-29 | 2014-01-15 | 上海博建电子科技有限公司 | Inner rotor type permanent magnet motor with rotor position sensor, method for detecting rotor position and servo motor system |
| CN103516166A (en) * | 2012-06-29 | 2014-01-15 | 上海博建电子科技有限公司 | Outer rotor type permanent magnet motor with rotor position sensor, method for detecting rotor position and servo motor system |
| CN103516167B (en) * | 2012-06-29 | 2015-11-18 | 上海博建电子科技有限公司 | There is the inner-rotor type magneto of rotor-position sensor, rotor position detecting method and servo electrical machinery system |
| CN103516166B (en) * | 2012-06-29 | 2016-01-06 | 上海博建电子科技有限公司 | There is the outer-rotor type magneto of rotor-position sensor, rotor position detecting method and servo electrical machinery system |
| CN105469966A (en) * | 2016-01-12 | 2016-04-06 | 上海吉亿电机有限公司 | Rotary transformer |
| WO2018228250A1 (en) * | 2017-06-15 | 2018-12-20 | 新疆金风科技股份有限公司 | Motor rotation angle measurement device and method |
| US11353340B2 (en) | 2017-06-15 | 2022-06-07 | Xinjiang Goldwind Science & Technology Co., Ltd. | Motor rotation angle measurement device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20160106 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |