CN209375383U - A kind of permanent magnet machine rotor position-measurement device - Google Patents
A kind of permanent magnet machine rotor position-measurement device Download PDFInfo
- Publication number
- CN209375383U CN209375383U CN201920104242.3U CN201920104242U CN209375383U CN 209375383 U CN209375383 U CN 209375383U CN 201920104242 U CN201920104242 U CN 201920104242U CN 209375383 U CN209375383 U CN 209375383U
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- permanent magnet
- annular permanent
- hall sensor
- motor
- machine rotor
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- 238000005259 measurement Methods 0.000 title claims abstract description 14
- 230000001360 synchronised effect Effects 0.000 claims abstract description 9
- 238000001514 detection method Methods 0.000 description 10
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000000691 measurement method Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011896 sensitive detection Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The utility model relates to a kind of permanent magnet machine rotor position-measurement devices, including annular permanent magnet and Hall sensor, it is characterized in that, the annular permanent magnet is mounted on the motor shaft of motor, the annular permanent magnet being capable of rotation with motor and motor shaft synchronous rotary；The annular permanent magnet replaces radial magnetizing, so that the number of pole-pairs of annular permanent magnet is equal with the number of pole-pairs of the motor；The side of the anchor ring of the annular permanent magnet is provided with Hall sensor, and there are air gaps between the Hall sensor and annular permanent magnet；The Hall sensor is connected by cable with data processing equipment；The Hall sensor is used to acquire the magnetic field angle of annular permanent magnet, and the magnetic field angle of collected annular permanent magnet is converted to the rotor-position of permanent magnet synchronous motor by the data processing equipment.The utility model ensures to reduce cost while measurement data high reliability.
Description
Technical field
The utility model relates to motor rotor position field of measuring technique, more particularly to a kind of permanent magnet machine rotor position
Measuring device.
Background technique
In the prior art, magneto control mode mostly uses vector controlled, Direct Torque Control, PI control, sliding formwork control
System etc., but any control mode no matter is used to require to determine that permanent magnet machine rotor position becomes as the input of control system
Amount.Traditional rotor position measurement method has grating encoder detection, rotary transformer detection, counter electromotive force detection technique etc..
However grating encoder detection device is expensive in actual use and high-precision grating encoder size is larger,
Rotary transformer detection needs external excitation winding and rotary transformer rotor and external decoding circuitry higher cost, counter electromotive force
Measuring technique is big to the very sensitive detection difficulty of the variation of stator voltage and current value in motor low speed.
From the above mentioned, how to seek a kind of new permanent magnet machine rotor location measurement method, to realize motor rotor position
Quick accurate, strong immunity to interference is simply installed, the detection method and device of low cost, is become those skilled in the art and is needed
The technical issues of solution.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of permanent magnet machine rotor position-measurement devices, it is ensured that surveys
Cost is reduced while measuring data high reliability.
The technical scheme adopted by the utility model to solve the technical problem is as follows: providing a kind of permanent magnet machine rotor position survey
Device is measured, including annular permanent magnet and Hall sensor, the annular permanent magnet are mounted on the motor shaft of motor, the annular
Permanent magnet can with motor rotation and motor shaft synchronous rotary；The annular permanent magnet replaces radial magnetizing, so that annular
The number of pole-pairs of permanent magnet is equal with the number of pole-pairs of the motor；The side of the anchor ring of the annular permanent magnet is provided with hall sensing
Device, there are air gaps between the Hall sensor and annular permanent magnet；The Hall sensor is filled by cable and data processing
It sets connected；The Hall sensor is used to acquire the magnetic field angle of annular permanent magnet, and the data processing equipment will be collected
The magnetic field angle of annular permanent magnet is converted to the rotor-position of permanent magnet synchronous motor.
The ring of the annular permanent magnet is arranged in by the mounting device being mounted on electric motor end cap for the Hall sensor
The side in face.
The measurement sensitive surface of the Hall sensor is radial vertical with the annular permanent magnet.
Beneficial effect
Due to the adoption of the above technical solution, the utility model compared with prior art, has the following advantages that and accumulates
Pole effect: the utility model is coaxially installed on the magnetic field angle of permanent magnet on motor shaft by Hall sensor measurement, uses number
The rotor-position of magneto can be measured according to processing module.More traditional rotary transformer measurement method, the utility model drop
Low detection device cost, makes to detect eased, simplifies traditional measurement method, and improve the anti-interference energy of detection device
Power.
Detailed description of the invention
Fig. 1 is the measuring principle schematic diagram of the utility model；
Fig. 2 is the location diagram of annular permanent magnet and Hall sensor in the utility model；
Fig. 3 is the magnetic direction schematic diagram of Hall sensor in the utility model.
Specific embodiment
The present invention will be further illustrated below in conjunction with specific embodiments.It should be understood that these embodiments are merely to illustrate this
Utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, in the content for having read the utility model instruction
Later, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms equally fall within this Shen
It please the appended claims limited range.
The embodiments of the present invention is related to a kind of permanent magnet machine rotor position-measurement device, using annular permanent magnet diameter
To magnetizing, it is mounted on synchronous rotation on motor shaft, annular permanent magnet magnetic field angle becomes with motor rotating circulating
Change；Using Hall sensor measure annular permanent magnet field angle, telecommunications is exported to Hall sensor by data processing equipment
Number carry out data conversion, obtain annular permanent magnet angular values, which can measure permanent magnet machine rotor position indirectly.
As shown in Figure 1, the permanent magnet machine rotor position-measurement device includes annular permanent magnet 4 and Hall sensor 3, it is described
Annular permanent magnet 4 is mounted on the motor shaft 6 of motor 1, the annular permanent magnet 4 can with motor 1 rotation and motor shaft 6
Synchronous rotary；The annular permanent magnet 4 replaces radial magnetizing, so that the number of pole-pairs of annular permanent magnet 4 and the motor 1 is extremely right
Number is equal；The side of the anchor ring of the annular permanent magnet 4 is provided with Hall sensor 3, the Hall sensor 3 and annular permanent magnet
There are air gaps between iron 4；The Hall sensor 3 is connected by cable 7 with data processing equipment 5；The Hall sensor 3 is used
In the magnetic field angle of acquisition annular permanent magnet, the data processing equipment 5 turns the magnetic field angle of collected annular permanent magnet
It is changed to the rotor-position of permanent magnet synchronous motor.Wherein, the Hall sensor 3 is filled by the installation being mounted on electric motor end cap 2
The side for the anchor ring that 8 are arranged in the annular permanent magnet 4 is set, and the measurement sensitive surface of Hall sensor 3 and the annular are forever
The radial direction of magnet 4 is vertical, as shown in Figures 2 and 3, wherein plane is vertical Hall sensor 3 guarantees its Bx and Bz axis when installing where
Directly in the radial direction By of annular permanent magnet 4, such setting can guarantee that Hall sensor 3 can accurately collect annular permanent-magnet
The magnetic field angle of iron 4.After Hall sensor 3 collects data, PWM electric signal can be exported, different PWM electric signals illustrates
The magnetic field angle of different annular permanent magnets 4, data processing equipment 5 can receive Hall sensor 3 and export PWM duty cycle letter
Number, permanent magnet machine rotor position, pwm signal and permanent magnet machine rotor position corresponding relationship formula are calculated according to the following formula
It is as follows:
θ=θ0+2π/(K·P)·(D-D0)
θ: permanent magnet machine rotor position；
θ0: permanent magnet machine rotor initial position；
K: Hall sensor PWM duty cycle exports maximum changing range；
P: magneto number of pole-pairs to be measured；
D: Hall sensor output duty cycle signal；
D0: Hall sensor exports initial duty cycle signal；
After it receives the PWM electric signal D of the transmission of Hall sensor 3, motor initial position θ according to the pre-stored data0、
The exportable maximum duty cycle range K of Hall sensor, the motor number of pole-pairs P of magneto to be measured, Hall sensor output are just
Beginning duty cycle signals D0, current permanent magnet machine rotor location information is calculated.It is as follows when specific detection:
A magnetizes to circular ring-shaped permanent-magnet iron, and the number of pole-pairs that magnetizes is identical as motor number of pole-pairs is installed and used, and the mode that magnetizes is the South Pole
(S) arctic (N) grade replaces radial magnetizing and guarantees that outside magnetic field strength is larger；
The B annular permanent magnet finished that will magnetize is mounted on motor shaft, and is connected in motor shaft；
C Hall sensor is fixed on back end cover for motor, and electric motor end cap makes Hall sensor rigid after installing with motor body
It is located at circular ring-shaped permanent-magnet iron hoop face side well, air gap between Hall sensor and permanent magnet is determined according to the permanent magnet intensity that magnetizes,
Sensor position magnetic field strength meets the requirement of chip magnetic field strength；
Hall sensor is connected by D by cable with data processing equipment；
E data processing equipment reads the output of Hall sensor electric signal, will using calculation formula according to obtained electric signal
PWM electric signal is converted to permanent magnet machine rotor location information.
It is not difficult to find that the utility model is coaxially installed on the magnetic field angle of permanent magnet on motor shaft by Hall sensor measurement
Degree, the rotor-position of magneto can be measured using data processing equipment.Compared to traditional rotary transformer measurement method,
The utility model reduces detection device cost, makes to detect eased, simplifies traditional measurement method, and use PWM count
Word signal transmission of location information, to improve detection device anti-interference ability.
Claims (3)
1. a kind of permanent magnet machine rotor position-measurement device, including annular permanent magnet and Hall sensor, which is characterized in that described
Annular permanent magnet is mounted on the motor shaft of motor, and the annular permanent magnet can be with the rotation of motor rotation synchronous with motor shaft
Turn；The annular permanent magnet replaces radial magnetizing, so that the number of pole-pairs of annular permanent magnet is equal with the number of pole-pairs of the motor；Institute
The side for stating the anchor ring of annular permanent magnet is provided with Hall sensor, and there are gas between the Hall sensor and annular permanent magnet
Gap；The Hall sensor is connected by cable with data processing equipment；The Hall sensor is for acquiring annular permanent magnet
Magnetic field angle, the magnetic field angle of collected annular permanent magnet is converted to permanent magnet synchronous motor by the data processing equipment
Rotor-position.
2. permanent magnet machine rotor position-measurement device according to claim 1, which is characterized in that the Hall sensor is logical
Cross the side that the anchor ring of the annular permanent magnet is arranged in the mounting device being mounted on electric motor end cap.
3. permanent magnet machine rotor position-measurement device according to claim 1, which is characterized in that the Hall sensor
It is radial vertical with the annular permanent magnet to measure sensitive surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920104242.3U CN209375383U (en) | 2019-01-22 | 2019-01-22 | A kind of permanent magnet machine rotor position-measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920104242.3U CN209375383U (en) | 2019-01-22 | 2019-01-22 | A kind of permanent magnet machine rotor position-measurement device |
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| Publication Number | Publication Date |
|---|---|
| CN209375383U true CN209375383U (en) | 2019-09-10 |
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|---|---|---|---|
| CN201920104242.3U Active CN209375383U (en) | 2019-01-22 | 2019-01-22 | A kind of permanent magnet machine rotor position-measurement device |
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| Country | Link |
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| CN (1) | CN209375383U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842245A (en) * | 2019-01-22 | 2019-06-04 | 上海拓为汽车技术有限公司 | A kind of permanent magnet machine rotor position-measurement device and method |
| CN114236280A (en) * | 2021-12-13 | 2022-03-25 | 国网福建省电力有限公司电力科学研究院 | Detection device and state detection method for electric mechanism of on-load tap-changer |
-
2019
- 2019-01-22 CN CN201920104242.3U patent/CN209375383U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109842245A (en) * | 2019-01-22 | 2019-06-04 | 上海拓为汽车技术有限公司 | A kind of permanent magnet machine rotor position-measurement device and method |
| CN114236280A (en) * | 2021-12-13 | 2022-03-25 | 国网福建省电力有限公司电力科学研究院 | Detection device and state detection method for electric mechanism of on-load tap-changer |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240329 Address after: No. 268, Yuwangshan Road, Daqi Street, Beilun District, Ningbo, Zhejiang 315825 Patentee after: NINGBO TUOPU GROUP Co.,Ltd. Country or region after: China Address before: 201203 Shanghai Pudong New Area China (Shanghai) Free Trade Pilot Area, No. 88 Darwin Road, 3 buildings, 5 floors Patentee before: SHANGHAI TUOWEI AUTOMOTIVE TECHNOLOGY CO.,LTD. Country or region before: China |