CN208955839U - A kind of brshless DC motor - Google Patents
A kind of brshless DC motor Download PDFInfo
- Publication number
- CN208955839U CN208955839U CN201821513414.4U CN201821513414U CN208955839U CN 208955839 U CN208955839 U CN 208955839U CN 201821513414 U CN201821513414 U CN 201821513414U CN 208955839 U CN208955839 U CN 208955839U
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- CN
- China
- Prior art keywords
- permanent magnet
- motor
- hall sensor
- bearing
- brshless
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a kind of brshless DC motors, including electric machine casing, motor shaft, rotor core, stator core, stator winding, electric motor end cap, first bearing, second bearing, the first permanent magnet, the second permanent magnet, Hall sensor, waveform spring, the stator core is fixed on inside electric machine casing, first permanent magnet is mounted on rotor core exterior surface, second permanent magnet is mounted on one end of motor shaft, and the Hall sensor detects the magnetic pole of the second permanent magnet.The utility model uses two groups of permanent magnets, first group of permanent magnet is used to do position detection for generating excitation, second group of permanent magnet, keeps Hall sensor installation simple, Hall sensor is avoided far from stator winding because of the sensor signal interference that high current generates simultaneously.
Description
Technical field
The utility model relates to electric motors, and in particular to a kind of brshless DC motor.
Background technique
60 the percent of national electricity consumption is used on motor, and AC induction motor occupies sizable specific gravity, is handed over
Stream asynchronous machine is used primarily on household electrical appliances and commercial power, in addition, some is direct current generator, direct current generator, which is divided into, brush
Motor and brushless motor, brush motor is several since the presence of brush has to be difficult to overcome the deficiency greatly, and one needs to safeguard for the later period, and two are
Commutation process is easy to produce electric spark, therefore brushless motor is in the market share for gradually substituting brush motor.Since country is to height
The policy inclination of motor is imitated, current several big household electrical appliances have brushless motor model, including brushless motor washing machine, brushless motor electricity ice
Case, brushless motor air-conditioning, brushless motor smoke exhaust ventilator, brushless motor dish-washing machine etc..Brushless motor generallys use Hall sensor
As position sensor, because it is its at low cost, high reliablity, durable, but Hall sensor meeting when motor has larger current
There are interference, and as the power of brushless motor increases, rotor magnetic steel also increases therewith, and the placement of hall sensor circuit plate also becomes
It is complicated, circuit board size becomes larger, and increases cost, while Hall Plate inconvenient later period maintenance inside housings.
Summary of the invention
To overcome disadvantage mentioned above, the utility model proposes a kind of brshless DC motor, the present invention uses two groups of permanent magnets, the
One group of permanent magnet is used to do position detection for generating excitation, second group of permanent magnet, keeps Hall sensor installation simple, while suddenly
That sensor is avoided far from stator winding because of the sensor signal interference that high current generates.
The present invention is achieved by the following technical solutions:
The utility model includes electric machine casing, motor shaft, rotor core, stator core, stator winding, electric motor end cap,
One bearing, second bearing, the first permanent magnet, the second permanent magnet, Hall sensor, waveform spring, the stator core are fixed on
Inside electric machine casing, first permanent magnet is mounted on rotor core exterior surface, and second permanent magnet is mounted on motor shaft
One end, the Hall sensor detect the magnetic pole of the second permanent magnet.
Preferably, the first permanent magnet is identical as the second permanent magnet magnetic number of pole-pairs, magnetic pole distribution angle circumferentially
Unanimously.
Detailed description of the invention
Fig. 1 is the structure chart of the utility model；
In Fig. 1,1 electric machine casing, 2 motor shafts, 3 rotor cores, 4 stator cores, 5 stator winding, 6 electric motor end caps, 7 first
Bearing, 8 second bearings, 9 first permanent magnets, 10 second permanent magnets, 11 Hall sensors, 12 waveform springs.
Specific embodiment
Below in conjunction with drawings and examples, the utility model is described in further detail:
Fig. 1, this it is practical newly include electric machine casing, motor shaft, rotor core, stator core, stator winding, electric motor end cap,
First bearing, second bearing, the first permanent magnet, the second permanent magnet, Hall sensor, waveform spring, the stator core are fixed
Inside electric machine casing, first permanent magnet is mounted on rotor core exterior surface, and second permanent magnet is mounted on motor shaft
One end, the Hall sensor detects the magnetic pole of the second permanent magnet.
Preferably, the first permanent magnet and the second permanent magnet are two pairs of poles, magnetic pole distribution angle one circumferentially
It causes, the magnetic-pole signals that Hall sensor collects the second permanent magnet are consistent with the position signal of the first permanent magnet, forever using second
The position signal of magnet measured can equivalent first permanent magnet position signal.
Preferably, motor shaft and rotor core, first bearing, second bearing use interference connection type, the first permanent magnetism
Body is using glue sticking on rotor core.
Preferably, between motor casing body end and first bearing use waveform spring, as prevent rotor play produce
Raw noise.
Hall sensor is uniformly installed according to 60 degree of angles of difference, preferably, Hall sensor is defeated using open collector
Type out.
Embodiment described above is only that preferred embodiments of the present invention will be described, not to design of the invention
It is defined with range.Without departing from the design concept of the invention, ordinary people in the field is to technical side of the invention
The all variations and modifications that case is made, should all drop into protection scope of the present invention, the claimed technology contents of the present invention,
Through being all described in the claims.
Claims (3)
1. a kind of brshless DC motor, it is characterised in that: including electric machine casing (1), motor shaft (2), rotor core (3), stator
Iron core (4), stator winding (5), electric motor end cap (6), first bearing (7), second bearing (8), the first permanent magnet (9), second are forever
Magnet (10), Hall sensor (11), waveform spring (12), the stator core (4) are fixed on electric machine casing (1) inside, institute
It states the first permanent magnet and is mounted on rotor core (3) outer surface, second permanent magnet (10) is mounted on one end of motor shaft (2),
The magnetic pole of Hall sensor (11) detection the second permanent magnet (10).
2. a kind of brshless DC motor according to claim 1, it is characterised in that: first permanent magnet (9) and second
Permanent magnet (10) number of magnetic pole pairs are identical.
3. a kind of brshless DC motor according to claim 2, it is characterised in that: first permanent magnet (9) and second
The magnetic pole distribution angle of permanent magnet (10) circumferentially is consistent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821513414.4U CN208955839U (en) | 2018-09-04 | 2018-09-04 | A kind of brshless DC motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821513414.4U CN208955839U (en) | 2018-09-04 | 2018-09-04 | A kind of brshless DC motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208955839U true CN208955839U (en) | 2019-06-07 |
Family
ID=66738220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821513414.4U Expired - Fee Related CN208955839U (en) | 2018-09-04 | 2018-09-04 | A kind of brshless DC motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208955839U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116365794A (en) * | 2022-12-29 | 2023-06-30 | 襄阳航力机电技术发展有限公司 | Brushless DC motor |
| WO2024104348A1 (en) * | 2022-11-15 | 2024-05-23 | 广东肇庆爱龙威机电有限公司 | Brushless motor and brushless motor rotor position detection method |
-
2018
- 2018-09-04 CN CN201821513414.4U patent/CN208955839U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024104348A1 (en) * | 2022-11-15 | 2024-05-23 | 广东肇庆爱龙威机电有限公司 | Brushless motor and brushless motor rotor position detection method |
| CN116365794A (en) * | 2022-12-29 | 2023-06-30 | 襄阳航力机电技术发展有限公司 | Brushless DC motor |
| CN116365794B (en) * | 2022-12-29 | 2024-02-20 | 襄阳航力机电技术发展有限公司 | Brushless DC motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190607 Termination date: 20200904 |