CN203840175U - 2-pole brushless direct current motor position sensor - Google Patents
2-pole brushless direct current motor position sensor Download PDFInfo
- Publication number
- CN203840175U CN203840175U CN201420261068.0U CN201420261068U CN203840175U CN 203840175 U CN203840175 U CN 203840175U CN 201420261068 U CN201420261068 U CN 201420261068U CN 203840175 U CN203840175 U CN 203840175U
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- shell
- direct current
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- hollow shaft
- current motor
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Abstract
The utility model relates to a 2-pole brushless direct current motor position sensor. In a brushless direct current motor control system, the size of a hall sensor is small, mounting is difficult, and errors of output signals are large. A photoelectric encoder can not be applied to violent-vibration, humid, oily and dusty harsh environments. The 2-pole brushless direct current motor position sensor comprises a shell (3), the shell is arranged on a support (9), the top part of the shell is provided with an end cover (8); the lower surface of the end cover is provided with a circuit board (7), the lower opening of the shell passes through a hollow shaft (1), a bearing (2) is arranged between the inner surface of the shell and the hollow shaft, the upper end of the hollow shaft is sleeved with a 2-pole annular magnetic steel (4), the 2-pole annular magnetic steel is sleeved with an annular iron core (5); a groove is formed between the 2-pole annular magnetic steel and the annular iron core, three pieces of switch hall sensors (6) are arranged inside the groove; a power supply circuit (10) is integrated on the circuit board; and the power supply circuit is connected with the hall sensors. The 2-pole brushless direct current motor position sensor can be applied to brushless direct current motor commutation position detection.
Description
technical field:
the utility model relates to a kind of 2 pole brushless DC motor position sensors.
background technology:
in brushless DC motor control system, conventional position transducer has Hall element and photoelectric encoder.Hall element volume is little, low price, but because it installs difficulty, output signal error is large, has limited its use.Photoelectric encoder is a kind of Electric Machine Control transducer that collects light, mechanical, electrical one.Because the shortcoming of himself, can't be applied to the adverse circumstances that vibration is violent, moist, have greasy dirt and dust; Because photoelectric device is not long useful life, the useful life of having limited photoelectric encoder; Manufacturing process complexity causes the expensive of photoelectric encoder.Above shortcoming, has limited the range of application of photoelectric encoder greatly, cannot be used in adverse circumstances and particular surroundings, such as fields such as space flight.
summary of the invention:
the purpose of this utility model is to provide a kind of 2 pole brushless DC motor position sensors.
above-mentioned object realizes by following technical scheme:
a kind of 2 pole brushless DC motor position sensors, its composition comprises: shell, described cover top portion has end cap, described end cap lower surface mounting circuit boards, the end opening place of described shell penetrates hollow shaft, between described inner surface of outer cover and described hollow shaft, bearing is installed, described hollow shaft upper end is set with 2 utmost point annular magnetic steels, the described outside suit of 2 utmost point annular magnetic steels annular core, between 2 described utmost point annular magnetic steels and described annular core, form groove, three switch Hall transducers are installed in described groove; Wherein, integrated power supply circuits on described circuit board, described power supply circuits connect described switch Hall transducer.
2 described pole brushless DC motor position sensors, described switch Hall transducer is vertically placed on space on described circuit board, phase difference between switch Hall transducer described in three is 120 degree electrical degrees, and the mechanical angle of described switch Hall transducer vertical welding differs 60 °.
the beneficial effects of the utility model:
1. the utility model is to be set with 2 utmost point annular magnetic steels by hollow shaft upper end, the outside suit of 2 utmost point annular magnetic steels annular core, and three switch Hall transducers installing between 2 utmost point annular magnetic steels and annular core form checkout gear; 2 utmost point annular magnetic steels and a pair of utmost point square wave field of generation by radial magnetizing, for the position probing of a pair of pole brushless DC motor, and provide 2 pole brushless DC motor commutation signals.There is advantage simple in structure, easy for installation, the cost of the transducer that can greatly dip, production cost is compared with the about reduction by 20% of equal accuracy photoelectric encoder.
2. the utility model adopts magnet structure, has saved photoelectric device, compares with photoelectric encoder, has greatly extended useful life.And it is strong that it adapts to adverse circumstances ability, owing to adopting magnet structure, violent to vibrating, moist, to have greasy dirt and dust adverse circumstances adaptable, has expanded the range of application of position transducer.
accompanying drawing explanation:
accompanying drawing 1 is structural representation of the present utility model.
accompanying drawing 2 is the utility model enclosure winding diagrams.
accompanying drawing 3 is the iron core relating to of the present utility model and 2 utmost point annular magnetic steel locations drawing.
accompanying drawing 4 is switch Hall sensor phase graphs of a relation that the utility model relates to.In figure, 15,16,17 are respectively U, V, W three-phase hall signal waveform.
embodiment:
embodiment 1:
a kind of 2 pole brushless DC motor position sensors, its composition comprises: shell 3, described shell 3 is arranged on support 9, described cover top portion has end cap 8, described end cap lower surface mounting circuit boards 7, the end opening place of described shell penetrates hollow shaft 1, between described inner surface of outer cover and described hollow shaft, bearing 2 is installed, described hollow shaft upper end is set with 2 utmost point annular magnetic steels 4, the described outside suit of 2 utmost point annular magnetic steels annular core 5, between 2 described utmost point annular magnetic steels and described annular core, form groove, three switch Hall transducers 6 are installed in described groove, wherein, integrated power supply circuits 10 on described circuit board, described power supply circuits connect described switch Hall transducer.
on the circuit board of described enclosure, described power supply circuits are 5V power supply, described 5V power supply connects described switch Hall transducer and three pull-up resistors 11, described pull-up resistor connects described switch Hall transducer, described pull-up resistor also connects respectively motor U phase position signal 12, motor V phase position signal 13 and motor W phase position signal 14, and described shell also connects power supply ground 15.
2 described utmost point annular magnetic steels are radial magnetizing, for generation of a pair of utmost point square wave field, are applicable to the position probing of a pair of pole brushless DC motor.
described shell adopts permeability magnetic material, the magnetic interference of isolating exterior environment.
embodiment 2:
according to 2 pole brushless DC motor position sensors described in embodiment 1, described switch Hall transducer is vertically placed on space on described circuit board, phase difference between switch Hall transducer described in three is 120 degree electrical degrees, the square wave field that described switch Hall transducer produces for sensing 2 utmost point annular magnetic steels, the mechanical angle of described switch Hall transducer vertical welding differs 60 °.
Claims (2)
1. a pole brushless DC motor position sensor, its composition comprises: shell, it is characterized in that: described cover top portion has end cap, described end cap lower surface mounting circuit boards, the end opening place of described shell penetrates hollow shaft, between described inner surface of outer cover and described hollow shaft, bearing is installed, described hollow shaft upper end is set with 2 utmost point annular magnetic steels, the described outside suit of 2 utmost point annular magnetic steels annular core, between 2 described utmost point annular magnetic steels and described annular core, form groove, three switch Hall transducers are installed in described groove; Wherein, integrated power supply circuits on described circuit board, described power supply circuits connect described switch Hall transducer.
2. 2 pole brushless DC motor position sensors according to claim 1, it is characterized in that: described switch Hall transducer is vertically placed on space on described circuit board, phase difference between switch Hall transducer described in three is 120 degree electrical degrees, and the mechanical angle of described switch Hall transducer vertical welding differs 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261068.0U CN203840175U (en) | 2014-05-21 | 2014-05-21 | 2-pole brushless direct current motor position sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420261068.0U CN203840175U (en) | 2014-05-21 | 2014-05-21 | 2-pole brushless direct current motor position sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203840175U true CN203840175U (en) | 2014-09-17 |
Family
ID=51517969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420261068.0U Expired - Fee Related CN203840175U (en) | 2014-05-21 | 2014-05-21 | 2-pole brushless direct current motor position sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203840175U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558970A (en) * | 2015-09-28 | 2017-04-05 | 浙江超强机械有限公司 | A kind of non-brush permanent-magnet DC motor |
-
2014
- 2014-05-21 CN CN201420261068.0U patent/CN203840175U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106558970A (en) * | 2015-09-28 | 2017-04-05 | 浙江超强机械有限公司 | A kind of non-brush permanent-magnet DC motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20160521 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |