CN209659097U - The detecting apparatus for rotor position of magneto - Google Patents
The detecting apparatus for rotor position of magneto Download PDFInfo
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- CN209659097U CN209659097U CN201920295771.6U CN201920295771U CN209659097U CN 209659097 U CN209659097 U CN 209659097U CN 201920295771 U CN201920295771 U CN 201920295771U CN 209659097 U CN209659097 U CN 209659097U
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- position sensor
- hall position
- permanent magnet
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Abstract
This application discloses a kind of detecting apparatus for rotor position of magneto, comprising: constitutes the permanent magnet, rotor core and stator core of magneto, between rotor core and stator core, permanent magnet connects permanent magnet with rotor core；Pcb board is fixed on stator core；Hall position sensor is fixed on towards permanent magnet on pcb board, and certain space is reserved between permanent magnet；Wherein, hall position sensor includes the first hall position sensor and the second hall position sensor, and the electric angle between the axis of the first hall position sensor and the axis of the second hall position sensor is 90 °.The utility model differs the hall position sensor of 90 ° of electric angles using two to obtain hall sensor signal, reduces a hall position sensor and peripheral components, reduces hardware complexity and cost；Due to the reduction of device, reduce the power consumption of circuit.
Description
Technical field
The utility model relates to motor control technology field, in particular to the rotor-position of a kind of magneto detects dress
It sets.
Background technique
Magneto due to having the characteristics that low manufacture cost and process, have become current industrial automation and
One of household electrical appliances, main driving motor of automobile and other industries.But either permanent-magnet brushless DC electric machine or permanent magnet synchronous electric
Machine requires a position detecting device as driver and provides rotor-position signal, thus the accuracy of position detecting device
Become the key of system reliability with reliability.
Do not consider cost or needing the precision actuation occasion of very high degree of precision, usually uses rotary transformer and orthogonal coding
Device is as position detecting device, but these sensors is at high cost.And hall position is usually used in inexpensive application field
Sensor is as position detecting element.
Hall position sensor includes Hall element (position signal is converted into analog signal output), Hall IC (position
Confidence number is converted into the digital logic signal output of varying level).
In permanent magnet motor system, three hall position sensors are generally used, and hall position sensor is in placement location
120 ° of electric angles of upper difference, obtained three-phase hall sensor signal are each poor 120 ° of electric signal in timing；Then it controls
Device passes through obtained hall sensor signal and carries out angle calculation and motor control.
In some practical applications, it has been found that hall position sensor will appear the case where unstable performance or damage,
Reason includes that environment is excessively high, electrostatic injury, lightning surge damage etc..
Summary of the invention
In view of the above problems, the purpose of this utility model is to provide a kind of detecting apparatus for rotor position of magneto,
The hall position sensor of 90 ° of electric angles is differed to obtain hall sensor signal using two, and according to hall sensor signal
The detection for carrying out rotor seat reduces cost and hall position sensor probability of malfunction, when solution circuit board space is limited suddenly
The problem of your position sensor layout difficulty.
It is according to the present utility model in a first aspect, providing a kind of detecting apparatus for rotor position of magneto, comprising:
Permanent magnet, rotor core and the stator core of magneto are constituted, permanent magnet is located at rotor core and stator core
Between, permanent magnet connects with rotor core；
Pcb board is fixed on stator core surface；
Hall position sensor is fixed on towards the permanent magnet on the pcb board, and is reserved centainly between permanent magnet
Space；
Wherein, the hall position sensor includes the first hall position sensor and the second hall position sensor, institute
Stating the electric angle between the axis of the first hall position sensor and the axis of the second hall position sensor is 90 °.
Preferably, the angle between the axis of the hall position sensor and the surface of permanent magnet is 90 °.
Preferably, the machine between the axis of first hall position sensor and the axis of the second hall position sensor
Tool angle is 180 °/p, wherein p is the electrode logarithm of magneto.
Preferably, the signal wire of the hall position sensor and power supply line and the signal processing circuit electricity on pcb board
Connection.
Preferably, the rotor core is located at the inside of stator core, and permanent magnet connects with the periphery of rotor core；Or
Person, the stator core are located at the inside of rotor core, and permanent magnet connects with the inner wall of rotor core.
Preferably, the hall position sensor is the unipolarity or bipolarity hall position sensor of latch-type.
Preferably, when first hall position sensor is aligned with the axis of the first phase winding, the signal processing electricity
Road exports the first hall sensor signal and the second hall sensor signal.
Preferably, when the axis of first hall position sensor and the first phase winding is unjustified, the signal processing
Circuit compensates the first hall sensor signal and the second hall sensor signal offline, and exports compensated first Hall position
Confidence number and the second hall sensor signal.
Preferably, the pcb board is fixed on stator core by fixing groove.
The detecting apparatus for rotor position of magneto provided by the utility model differs 90 ° of electric angles using two
Hall position sensor obtains hall sensor signal, reduces a hall position sensor and peripheral components, reduces
Hardware complexity and cost；Due to the reduction of device, reduce the power consumption of circuit.
Further, hall device can be aligned with any angle of counter electromotive force of motor, be provided just for the wiring of pcb board
Benefit.
Detailed description of the invention
By referring to the drawings to the description of the utility model embodiment, above-mentioned and other mesh of the utility model
, feature and advantage will be apparent from, in the accompanying drawings:
Fig. 1 shows the partial cutaway of the detecting apparatus for rotor position of the magneto of the utility model first embodiment offer
Depending on structural schematic diagram；
The installation site signal that Fig. 2 shows hall position sensors provided by the embodiment of the utility model on pcb board
Figure；
Fig. 3 shows the axis view schematic view of the mounting position of hall position sensor provided by the embodiment of the utility model；
Fig. 4 is that the axis of simplified hall position sensor provided by the embodiment of the utility model regards installation site signal
Figure；
Fig. 5 is that the phase relation of two-phase hall sensor signal provided by the embodiment of the utility model and three phase back-emfs is shown
It is intended to；
Fig. 6 is the phase of simplified two-phase hall sensor signal and three phase back-emfs provided by the embodiment of the utility model
Position relation schematic diagram；
Fig. 7 is the broken section knot of the detecting apparatus for rotor position for the magneto that the utility model second embodiment provides
Structure schematic diagram.
Specific embodiment
Hereinafter reference will be made to the drawings is more fully described the various embodiments of the utility model.In various figures, identical
Element is indicated using same or similar appended drawing reference.For the sake of clarity, the various pieces in attached drawing are not drawn to draw
System.
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.
First embodiment
Referring to Fig. 1-Fig. 6, the detecting apparatus for rotor position of this magneto, including constituting the permanent magnet 1 of magneto, turning
Sub- iron core 2 and stator core 3, permanent magnet 1 is between rotor core 2 and stator core 3, permanent magnet 1 and 2 phase of rotor core
It connects；Pcb board 4 is fixed on 3 surface of stator core；Hall position sensor 5, be fixed on the pcb board 4 towards it is described forever
Magnet 1, and certain space is reserved between permanent magnet 1.The size in the space by the signal strength of hall position sensor 5 with
And the safe distance in real work determines.
In the present embodiment, magneto is internal rotor permanent-magnetic motor, and but it is not limited to this.Wherein, rotor core 2 is located at
The inside of stator core 3, permanent magnet 1 connect with the periphery of rotor core 2.
The detection faces of hall position sensor 5 are towards permanent magnet 1, and the surface face with permanent magnet 1.That is hall position
Angle between the axis of sensor and the surface of permanent magnet is 90 °.The back side of hall position sensor 5, that is, detection faces
Another side, be directly attached on pcb board 4.
Pcb board 4 is fixed on 3 surface of stator core by fixing groove 41.
The signal wire and power supply line of hall position sensor 5 (do not show with the signal processing circuit electricity 42 on pcb board 4 in figure
It connects out).Signal processing circuit 42 mainly includes that signal follows and amplifying circuit and protection circuit.Hall position in the present embodiment
Set that the unipolarity of latch-type can be used in sensor 5 or bipolarity hall sensor signal sensor, collected position signal pass through
Signal processing circuit 42 on pcb board 4 amplify with steady phase, concrete signal intensity and size should be with controller used therebies
Match.
Hall position sensor 5 is powered by pcb board 4, and pcb board 4 is powered by external power supply.When permanent magnet 1
When the brow leakage field of generation changes, hall position sensor 5 can perceive corresponding change in time, and generate position letter
Number.The position signal by be located at pcb board 4 on signal processing circuit amplify with steady phase, and then be supplied to controller progress
Relevant treatment operations.
As shown in Fig. 2, hall position sensor 5 includes the first hall position sensor 51 and the second hall position sensor
52, the first hall position sensor 51 and 52 is attached on pcb board 4, and the axis and second of the first hall position sensor 51 is suddenly
Mechanical angle between the axis of your position sensor 52 is 180 °/p, wherein p is the electrode logarithm of magneto.With electrode
For logarithm p=8, the mechanical angle that the first hall position sensor 51 is differed with the second hall position sensor 52 is 22.5 °.
When first hall position sensor 51 is aligned with the axis of the first phase winding, the signal processing circuit output first
Hall sensor signal HallA and the second hall sensor signal HallB.
When the axis of first hall position sensor 51 and the first phase winding is unjustified, the signal processing circuit 42
First hall sensor signal and the second hall sensor signal are compensated offline, and export compensated first hall position letter
Number HallA and the second hall sensor signal HallB.
Hall position sensor axis view installation site as shown in figure 3, this Fig. 3 by taking the magneto of 16 pole of two-phase as an example,
The part that shade is filled in Fig. 4 is coil windings 6.
In order to protrude the installation site of hall position sensor 5, pcb board 4 is omitted in Fig. 3.When the first hall position passes
The axis when axis of the axis of sensor 51 and the first phase winding (i.e. A phase winding) aligns, with the second hall position sensor 52
Line differs 90 ° of electric angles.
The axis of so-called hall position sensor is exactly the line (click and sweep in figure between hall position sensor and axle center
Line), so-called alignment refers to whether two lines are overlapped in installation site, and Fig. 3 is not to be overlapped, and Fig. 4 is to be overlapped.
The corresponding mechanical angle of 90 ° of electric angles is 360/m/p；Wherein, m is the number of phases, and p is electrode logarithm, in this example,
M=2, p=8, therefore mechanical angle is 22.5 °.
The detecting apparatus for rotor position of magneto in off-line case (i.e. controller power on, motor no power), rotation
Motor shaft obtains the angular relationship of two hall sensor signals and counter electromotive force.
First hall position sensor 51 differs β with the axis of the first phase winding, as β > 0, first Hall
Position sensor 51 and the axis of the first phase winding are unjustified, under off-line case, measure motor along when rotating forward, counter electromotive force and suddenly
Your timing diagram of position signal is as shown in Figure 5.First phase hall sensor signal HallA differs β with U phase back-emf zero crossing and puts
It sets, the second phase hall sensor signal HallB lags the first HallA90 ° of phase hall sensor signal.And the Hall state of record and anti-
The angle corresponding relationship of electromotive force is as shown in table 1.
As β=0, when first hall position sensor 51 is aligned with the axis of the first phase winding, under off-line case,
Motor is measured along when rotating forward, the timing diagram of counter electromotive force and hall sensor signal is as shown in Figure 6.First phase hall sensor signal
HallA and U phase back-emf zero passage point alignment are placed, and the second phase hall sensor signal HallB lags the first phase hall position letter
Number HallA90 °.And the Hall state of record and the angle corresponding relationship of counter electromotive force are as shown in table 2.
Table 1:
| Hall A condition | Hall B state | Counter electromotive force angle |
| 1 | 0 | β |
| 1 | 1 | β+90° |
| 0 | 1 | β+180° |
| 0 | 0 | β+270° |
Table 2:
| Hall A condition | Hall B state | Counter electromotive force angle |
| 1 | 0 | 0° |
| 1 | 1 | 90° |
| 0 | 1 | 180° |
| 0 | 0 | 270° |
The detecting apparatus for rotor position of magneto in normal operating conditions (i.e. controller power on, electrical power), is adopted
The Hall state that hall position sensor is detected with Micro-processor MCV, when MCU detects the jump edge of hall sensor signal,
Record the newest Hall state of hall position sensor；Newest Hall state is compared with last Hall state,
Changed according to Hall sequence of states and determine motor steering, when Hall variation sequence is 10- > 11- > 01- > 00, determines motor edge
It rotates in the forward direction；When Hall variation sequence is 10- > 00- > 01- > 11, determine motor along reverse rotation.According to newest Hall shape
State, inquiry table 2 obtain real-time counter electromotive force angle, θ.Using Micro-processor MCV to two adjacent edges of hall sensor signal
The time on edge carries out timing, and clocking value T, the operating electric frequency that can calculate motor is 1/ (4*T).Next Hall arrives it
Before, the real-time electrical angle of motor is
The detecting apparatus for rotor position of magneto provided by the utility model differs 90 ° of electric angles using two
Hall position sensor obtains hall sensor signal, reduces a hall position sensor and peripheral components, reduces
Hardware complexity and cost；Due to the reduction of device, reduce the power consumption of circuit.Further, hall device can be with motor
Any angle of phase back-emf is aligned, and provides convenience for the wiring of pcb board.
Second embodiment
Fig. 7 shows the part of the detecting apparatus for rotor position of the magneto provided according to the utility model second embodiment
Schematic cross-sectional view, referring to Fig. 7, in the present embodiment, magneto is outer-rotor permanent magnet motor, and stator core 3, which is located at, to be turned
Sub- 2 inside of iron core, permanent magnet 1 connect with the inner wall of rotor core 2.The detecting apparatus for rotor position and embodiment one of the present embodiment
Difference essentially consist in the type of magneto, other something in common are not repeating.
It is as described above according to the embodiments of the present invention, these embodiments details all there is no detailed descriptionthe,
Also not limiting the invention is only the specific embodiment.Obviously, as described above, can make many modifications and variations.This
These embodiments are chosen and specifically described to specification, be in order to preferably explain the principles of the present invention and practical application, from
And skilled artisan is enable to make well using the utility model and modification on the basis of the utility model
With.The utility model is limited only by the claims and their full scope and equivalents.
Claims (9)
1. a kind of detecting apparatus for rotor position of magneto characterized by comprising
Constitute magneto permanent magnet, rotor core and stator core, permanent magnet between rotor core and stator core,
Permanent magnet connects with rotor core；
Pcb board is fixed on stator core；
Hall position sensor is fixed on towards the permanent magnet on the pcb board, and certain sky is reserved between permanent magnet
Between；
Wherein, the hall position sensor includes the first hall position sensor and the second hall position sensor, and described the
Electric angle between the axis of one hall position sensor and the axis of the second hall position sensor is 90 °.
2. the apparatus according to claim 1, which is characterized in that the axis of the hall position sensor and the table of permanent magnet
Angle between face is 90 °.
3. the apparatus according to claim 1, which is characterized in that the axis and second of first hall position sensor is suddenly
Mechanical angle between the axis of your position sensor is 180 °/p, wherein p is the electrode logarithm of magneto.
4. the apparatus according to claim 1, which is characterized in that the signal wire and power supply line of the hall position sensor
It is electrically connected with the signal processing circuit on pcb board.
5. the apparatus according to claim 1, which is characterized in that the rotor core is located at the inside of stator core, permanent magnetism
Body connects with the periphery of rotor core；Alternatively, the stator core is located at the inside of rotor core, permanent magnet and rotor core
Inner wall connects.
6. device according to claim 5, which is characterized in that the hall position sensor be latch-type unipolarity or
Bipolarity hall position sensor.
7. device according to claim 4, which is characterized in that first hall position sensor and the first phase winding
When axis is aligned, the signal processing circuit exports the first hall sensor signal and the second hall sensor signal.
8. device according to claim 4, which is characterized in that first hall position sensor and the first phase winding
When axis is unjustified, the signal processing circuit mends the first hall sensor signal and the second hall sensor signal offline
It repays, and exports compensated first hall sensor signal and the second hall sensor signal.
9. the apparatus according to claim 1, which is characterized in that the pcb board is fixed on stator core by fixing groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920295771.6U CN209659097U (en) | 2019-03-08 | 2019-03-08 | The detecting apparatus for rotor position of magneto |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920295771.6U CN209659097U (en) | 2019-03-08 | 2019-03-08 | The detecting apparatus for rotor position of magneto |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932514A (en) * | 2019-12-30 | 2020-03-27 | 深圳市优必选科技股份有限公司 | Brushless motor and detection method for motor rotor position |
| CN114089231A (en) * | 2021-11-02 | 2022-02-25 | 湖南大学 | Magnetic sensor module, printed permanent magnet synchronous motor and application method thereof |
-
2019
- 2019-03-08 CN CN201920295771.6U patent/CN209659097U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110932514A (en) * | 2019-12-30 | 2020-03-27 | 深圳市优必选科技股份有限公司 | Brushless motor and detection method for motor rotor position |
| CN114089231A (en) * | 2021-11-02 | 2022-02-25 | 湖南大学 | Magnetic sensor module, printed permanent magnet synchronous motor and application method thereof |
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