CN107806891A - The column type capacitance encoder and motor of motor - Google Patents
The column type capacitance encoder and motor of motor Download PDFInfo
- Publication number
- CN107806891A CN107806891A CN201610815255.2A CN201610815255A CN107806891A CN 107806891 A CN107806891 A CN 107806891A CN 201610815255 A CN201610815255 A CN 201610815255A CN 107806891 A CN107806891 A CN 107806891A
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- China
- Prior art keywords
- cylindrical
- column
- column type
- type capacitance
- emitter stage
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/24—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance
- G01D5/241—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes
- G01D5/2412—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes by varying overlap
- G01D5/2415—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying capacitance by relative movement of capacitor electrodes by varying overlap adapted for encoders
Abstract
The present invention provides a kind of column type capacitance encoder of motor, including the first housing (10) and cylindrical pivot body (20).First housing has the internal surface of column (12) for forming cylindrical accommodating cavity (122).Cylindrical pivot body is located at cylindrical accommodating cavity and has cylindrical outer surface (22), and cylindrical pivot physical efficiency is around it axially with respect to the first housing into rotation.One in internal surface of column and cylindrical outer surface has the emitter stage (32) and receiving pole (34) that circumferentially ring is set successively vertically.Another in internal surface of column and cylindrical outer surface has the repellel (42) that circumferentially ring is set, and emitter stage, receiving pole can form Capacitance Coupled with repellel, emitter stage is sent transmission signal and receive reception signal in receiving pole.Main circuit board can electrically connect emitter stage and receiving pole, and to provide transmission signal to emitter stage, reception signal is received by receiving pole.Column type capacitance encoder adapts to various sizes of motor requirement.
Description
Technical field
Exemplary embodiment is related to a kind of encoder, more particularly to a kind of capacitance encoder.Exemplary embodiment also provides
A kind of motor with capacitance encoder.
Background technology
The structure of existing capacitance encoder as shown in fig. 6, it includes a moving grid 70 being oppositely arranged and a quiet grid 80,
Moving grid 70 and quiet grid 80 are coaxially disposed, and moving grid 70 can rotate with the rotor of motor relative to quiet grid 80.It is clear in figure
Show the self structure of moving grid 70 and quiet grid 80, separate moving grid 70 and quiet grid 80, as shown in FIG., moving grid 70 includes transmitting
Pole 72 and the receiving pole 74 to be insulated with emitter stage 72, and emitter stage 72 is by multiple electrode emission plates 722 circumferentially arranged successively
Composition, receiving pole 74 is loop configuration, corresponding, and quiet grid 80 are provided with repellel 82.Emitter stage 72, receiving pole 74 can be with
Repellel 82 forms Capacitance Coupled, due in the rotation process of moving grid 80, the area change of repellel 82, causing the electric capacity to be formed to produce
Raw electric current changes, and judges the turned position of the moving grid 80 i.e. position of rotor, to realize capacitance encoder function with this.
The content of the invention
The purpose of exemplary embodiment is to provide a kind of column type capacitance encoder of motor, its clever structure, can adapt to
Various sizes of motor requirement, can also be applied especially in micro-machine, and its stability is high, and measurement is more accurate.
Another purpose of exemplary embodiment is to provide a kind of motor with above-mentioned column type capacitance encoder.
Exemplary embodiment provides a kind of column type capacitance encoder of motor, and it includes first housing and a circle
Cylindricality rotor.First housing has the internal surface of column that can form a cylindrical accommodating cavity.Cylindrical pivot body is set
In cylindrical accommodating cavity, cylindrical pivot body has cylindrical outer surface, and cylindrical pivot body can be around the cylinder axial direction of itself
Relative to the first housing into rotation.One in internal surface of column and cylindrical outer surface connects with an emitter stage and one vertically
Receive pole.Another in internal surface of column and cylindrical outer surface has a repellel, being capable of shape between emitter stage and repellel
Into Capacitance Coupled, and Capacitance Coupled can be also formed between repellel and receiving pole, emitter stage is sent transmission signal and exist
Receiving pole receives reception signal.The clever structure of the column type capacitance encoder of above-mentioned motor, its emitter stage, receiving pole and repellel
Between arrangement help to be adapted to the size of motor, can also be applied in micro-machine.Further, since repellel with
It is the gap diametrically formed between emitter stage, receiving pole, when motor works, gap radially is than in the prior art
Gap on axial direction is more stable, fluctuation it is smaller, and due to emitter stage, receiving pole and repellel formed test surface and axial direction
PWM (pulse width modulation) noise separates farther out, also make it that the work of column type capacitance encoder is more stable, measurement is more accurate.
In a kind of exemplary embodiment of the column type capacitance encoder of motor, the cylinder of cylindrical pivot body axially with
The cylinder of cylindrical accommodating cavity is axially coaxially disposed.
In a kind of exemplary embodiment of the column type capacitance encoder of motor, circumferentially ring is set for emitter stage and receiving pole
One in internal surface of column and cylindrical outer surface, and emitter stage has the several emission electrode plates circumferentially arranged successively.
Repellel is circumferentially located on another in internal surface of column and cylindrical outer surface.
In a kind of exemplary embodiment of the column type capacitance encoder of motor, column type capacitance encoder also includes a master
Circuit board, main circuit board towards cylindrical pivot body, be arranged at axial one end of cylindrical pivot body, and main circuit board can
Emitter stage and receiving pole are electrically connected, to provide transmission signal to emitter stage, reception signal is received by receiving pole.
In a kind of exemplary embodiment of the column type capacitance encoder of motor, main circuit board is arranged at the first housing
In cylindrical accommodating cavity.
In a kind of exemplary embodiment of the column type capacitance encoder of motor, column type capacitance encoder also includes one
Second housing, second shell body is formed with a cavity that can house main circuit board.
In a kind of exemplary embodiment of the column type capacitance encoder of motor, main circuit board includes arranged in parallel
Two pieces of circuit boards.
In a kind of exemplary embodiment of the column type capacitance encoder of motor, repellel is arranged at cylindrical pivot body
Cylindrical outer surface, emitter stage and receiving pole are arranged at the internal surface of column of the first housing.
Exemplary embodiment additionally provides a kind of motor, it include a stator, one can relative to stator rotation turn
Son and an above-mentioned column type capacitance encoder, wherein, rotor all enough drives cylindrical pivot body to rotate.
Hereafter by a manner of clearly understandable, preferred embodiment is described with reference to the drawings, to the column type capacitance encoder of motor
It is further described with above-mentioned characteristic, technical characteristic, advantage and its implementation of motor.
Brief description of the drawings
The following drawings only does schematic illustration and explanation to exemplary embodiment, does not limit the model of exemplary embodiment
Enclose.
Fig. 1 to illustrate a kind of structural representation of exemplary embodiment of the column type capacitance encoder of motor,
Fig. 2 to illustrate to be provided with the expanded schematic diagram on the surface of emitter stage and receiving pole,
Fig. 3 to the expanded schematic diagram on the surface for illustrating to be provided with repellel,
Fig. 4 to illustrate the partial structurtes schematic cross-sectional view of the column type capacitance encoder of the motor shown in Fig. 1,
Fig. 5 to illustrate the structural representation of another exemplary embodiment of the column type capacitance encoder of motor,
Fig. 6 is illustrating the structural representation of existing capacitance encoder.
Label declaration
10 first housings
12 internal surface of column
122 cylindrical accommodating cavities
20 cylindrical pivot bodies
22 cylindrical outer surfaces
32 emitter stages
322 emission electrode plates
34 receiving poles
42 repellels
50 main circuit boards
52 circuit boards
60 second housings
70 moving grids
72 emitter stages
722 electrode emission plates
74 receiving poles
80 quiet grid
82 repellels
Embodiment
In order to which the technical characteristic of exemplary embodiment, purpose and effect are more clearly understood, now compare accompanying drawing and say
The embodiment of bright exemplary embodiment, in the various figures identical label represent that structure is identical or structure is similar but function phase
Same part.
Herein, " schematic " expression " serving as example, example or explanation ", will should not be described herein as " showing
Any diagram, the embodiment of meaning property " are construed to a kind of preferred or more advantageous technical scheme.
To make simplified form, the part related to exemplary embodiment is only schematically show in each figure, they are simultaneously
Its practical structures as product is not represented.In addition, to readily appreciate simplified form, have in some figures identical structure or
The part of function, only symbolically depicts one of those, or has only marked one of those.
Fig. 1 is illustrating a kind of structural representation of exemplary embodiment of the column type capacitance encoder of motor.Such as Fig. 1
Shown, the column type capacitance encoder of motor includes first housing 10 and a cylindrical pivot body 20.Wherein the first housing
10 have the internal surface of column 12 that can form a cylindrical accommodating cavity 122.Cylindrical pivot body 20 is arranged at cylinder and described
Chamber 122 is put, it has a cylindrical outer surface 22, and cylindrical pivot body 20 is coaxially disposed with cylindrical accommodating cavity 122.Cylinder
Rotor 20 can link with the rotor (being not drawn into figure) of motor, and under the drive of rotor, cylindrical pivot body 20 can
Rotated along the direction of arrow shown in figure around it axially with respect to the first housing 10.
Fig. 2 is illustrating to be provided with the expanded schematic diagram on the surface of emitter stage and receiving pole.Fig. 3 is anti-to illustrate to be provided with
The expanded schematic diagram on the surface of emitter-base bandgap grading.Wherein, in the internal surface of column 12 and cylindrical pivot body of above-mentioned cylindrical accommodating cavity 122
One in 20 cylindrical outer surface 22 emitter stage 32 and receiving pole 34 that can be provided with shown in Fig. 2, and it is accommodating in cylinder
Another in the internal surface of column 12 of chamber 122 and the cylindrical outer surface 22 of cylindrical pivot body 20 can be provided with shown in Fig. 3
Repellel 42.Wherein emitter stage 32 and receiving pole 34 can print on same circuit board but shield each other, and reflect
Pole 42 can print on another circuit board, and their concrete structure is see hereafter.
Such as emitter stage 32 as shown in Figure 2 can be set on the internal surface of column 12 of cylindrical accommodating cavity 122 and received
Pole 34, repellel 42 as shown in Figure 3 can be set on the cylindrical outer surface 22 of cylindrical pivot body 20.Those skilled in the art
It is appreciated that in the expanded view shown in Fig. 2, the vertical direction shown in arrow is the axial direction of internal surface of column 12, and horizontal
Direction is the circumference of internal surface of column 12.As shown in Fig. 2 along the axial direction of internal surface of column 12 (can referring also to Fig. 1) successively
With an emitter stage 32 and a receiving pole 34.And emitter stage 32 itself be circumferentially located on internal surface of column 12 (can be simultaneously
Referring to Fig. 1), emitter stage 32 also has the several emission electrode plates 322 circumferentially arranged successively.Receiving pole 34 itself is also circumferentially
It is located on internal surface of column 12 (can referring also to Fig. 1).It will be understood by those skilled in the art that in the expanded view shown in Fig. 3,
Vertical direction shown in arrow is the axial direction of cylindrical outer surface 22, and horizontal direction is the circumference of cylindrical outer surface 22.Instead
Emitter-base bandgap grading 42 is circumferentially located on cylindrical outer surface 22, as shown in figure 3, repellel 42 can be divided into one of mutual conduction along its axial direction
First reflecting part 422 and second reflecting part 424.On the internal surface of column 12 (referring to Fig. 1) of wherein cylindrical accommodating cavity 122
Emitter stage 32 can form electricity with the first reflecting part 422 on the cylindrical outer surface 22 (referring to Fig. 1) of cylindrical pivot body 20
Hold coupling, and the second reflecting part 424 on the cylindrical outer surface 22 (referring to Fig. 1) of cylindrical pivot body 20 can describe with cylinder
The receiving pole 34 put on the internal surface of column 12 (referring to Fig. 1) of chamber 122 forms Capacitance Coupled.The transmitting that now emitter stage 32 is sent
Signal can reflex to receiving pole 34 via repellel 42, receiving pole 34 is received corresponding reception signal.Such as Fig. 3 institutes
Show, it is in periodically variable wave edges 423 that the first reflecting part 422 can be made, which to have one in the circumferential, and this is periodically variable
Wave edges 423 make facing area between emitter stage 32 and repellel 42 into cyclically-varying during rotor rotates,
Reception signal is set change and the in prediction on such basis turned position of rotor occur.It will be understood by those skilled in the art that also can be in cylinder
Repellel 42 as shown in Figure 3 is set on the internal surface of column 12 of shape accommodating cavity 122, can be outside the cylinder of cylindrical pivot body 20
Emitter stage 32 and receiving pole 34 as shown in Figure 2 are set on surface 22.
The clever structure of the column type capacitance encoder of above-mentioned motor, between its emitter stage 32, receiving pole 34 and repellel 42
Arrangement help to be adapted to the size of motor, can also be applied in micro-machine.Further, since repellel 42 and hair
It is the gap diametrically formed between emitter-base bandgap grading 32, receiving pole 34, when motor works, gap radially is than prior art
The upward gap of axis is more stable, fluctuation it is smaller, and due to emitter stage 32, receiving pole 34 and repellel 42 formed test surface and
PWM (pulse width modulation) noise of axial direction separates farther out, also make it that the work of column type capacitance encoder is more stable, measurement is more smart
Really.
In the embodiment shown in Fig. 4, the column type capacitance encoder of motor also includes a main circuit board 50, main circuit
Plate 50 towards cylindrical pivot body 20, be arranged at axial one end of cylindrical pivot body 20, and main circuit board 50 can be electrically connected
Sending and receiving emitter-base bandgap grading 32 and receiving pole 34 (referring to Fig. 2), to provide above-mentioned transmission signal to emitter stage 32, are received by receiving pole 34
Above-mentioned reception signal, the change further according to reception signal calculate the turned position of rotor.
In the embodiment of the column type capacitance encoder of the motor shown in Fig. 4, main circuit board 50 is arranged at the first housing
In 10 cylindrical accommodating cavity 122, using such structure, the structure of column type capacitance encoder is more concentrated, easily safeguard and
Change.Wherein the first housing 10 can be the housing of motor, or single housing.
In the another embodiment of the column type capacitance encoder of the motor shown in Fig. 5, column type capacitance encoder also wraps
Second housing 60 is included, the second housing 60 is formed with a cavity that can house main circuit board 50.Equally, its first housing
10 can be the housing of motor, or single housing.
In the embodiment of the column type capacitance encoder of the motor shown in Fig. 4, main circuit board 50 includes being parallel to each other setting
The two pieces of circuit boards 52 put.Certainly difference according to the design needs, main circuit board 50 may also be only one piece of circuit board.
Exemplary embodiment additionally provides a kind of motor, it include a stator, one can relative to stator rotation turn
Son and an above-mentioned column type capacitance encoder, wherein, rotor all enough drives cylindrical pivot body to rotate.
It should be appreciated that although this specification is described according to each embodiment, not each embodiment only includes one
Individual independent technical scheme, this narrating mode of specification is only that those skilled in the art will should say for clarity
Bright book is as an entirety, and the technical solutions in the various embodiments may also be suitably combined, and forming those skilled in the art can be with
The other embodiment of understanding.
The a series of tool for describing the possible embodiments only for exemplary embodiment in detail of those listed above
Body illustrates that they are simultaneously not used to limit the protection domain of exemplary embodiment, all without departing from exemplary embodiment skill spirit institute
The equivalent embodiments of work or change, such as the combination, segmentation or repetition of feature, it should be included in the protection model of exemplary embodiment
Within enclosing.
Claims (9)
1. the column type capacitance encoder of motor, it is characterised in that the column type capacitance encoder includes：
One first housing (10), there is the internal surface of column (12) that can form a cylindrical accommodating cavity (122)；
One is arranged at the cylindrical pivot body (20) of cylindrical accommodating cavity (122), and cylindrical pivot body (20) has cylinder appearance
Face (22), and cylindrical pivot body (20) can rotate around the cylinder of itself axially with respect to the first housing (10),
One in internal surface of column (12) and cylindrical outer surface (22) has an emitter stage (32) and a receiving pole vertically
(34),
Another in internal surface of column (12) and cylindrical outer surface (22) has a repellel (42), emitter stage (32) and reflection
Capacitance Coupled can be formed between pole (42), and Capacitance Coupled can be also formed between repellel (42) and receiving pole (34), is made
Emitter stage (32), which sends transmission signal, to receive reception signal in receiving pole (34).
2. column type capacitance encoder as claimed in claim 1, it is characterised in that the cylinder of cylindrical pivot body (20) axially with
The cylinder of cylindrical accommodating cavity (122) is axially coaxially disposed.
3. column type capacitance encoder as claimed in claim 1, it is characterised in that
Emitter stage (32) and receiving pole (34) are circumferentially located on one in internal surface of column (12) and cylindrical outer surface (22),
And emitter stage (32) has the several emission electrode plates (322) circumferentially arranged successively,
Repellel (42) is circumferentially located on another in internal surface of column (12) and cylindrical outer surface (22).
4. column type capacitance encoder as claimed in claim 1, it is characterised in that the column type capacitance encoder also includes a master
Circuit board (50), main circuit board (50) towards cylindrical pivot body (20), be arranged at axial one of cylindrical pivot body (20)
End, and main circuit board (50) can electrically connect emitter stage (32) and receiving pole (34), to provide transmission signal to emitter stage (32),
Reception signal is received by receiving pole (34).
5. column type capacitance encoder as claimed in claim 2, it is characterised in that main circuit board (50) is arranged at the first housing
(10) in cylindrical accommodating cavity (122).
6. column type capacitance encoder as claimed in claim 3, it is characterised in that column type capacitance encoder also includes a second shell
Body (60), the second housing (60) is formed with a cavity that can house main circuit board (50).
7. the column type capacitance encoder as described in claim 5 or 6, it is characterised in that main circuit board (50) includes being parallel to each other
The two pieces of circuit boards (52) set.
8. column type capacitance encoder as claimed in claim 1, it is characterised in that
Repellel (42) is arranged at the cylindrical outer surface (22) of cylindrical pivot body (20)；
Emitter stage (32) and receiving pole (34) are arranged at the internal surface of column (12) of the first housing (10).
9. motor, it is characterised in that including：
One stator；
One relative to stator rotation rotor；With
Just like the column type capacitance encoder any one of claim 1 to 8, wherein, rotor can drive cylindrical pivot
Body rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815255.2A CN107806891A (en) | 2016-09-09 | 2016-09-09 | The column type capacitance encoder and motor of motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610815255.2A CN107806891A (en) | 2016-09-09 | 2016-09-09 | The column type capacitance encoder and motor of motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107806891A true CN107806891A (en) | 2018-03-16 |
Family
ID=61569692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610815255.2A Pending CN107806891A (en) | 2016-09-09 | 2016-09-09 | The column type capacitance encoder and motor of motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107806891A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62253786A (en) * | 1986-04-25 | 1987-11-05 | Hitachi Ltd | Device for dry etching |
| EP2527796A2 (en) * | 2011-05-27 | 2012-11-28 | Siemens Aktiengesellschaft | Capacitive rotary encoder and method for sensing a rotation angle |
| CN102998478A (en) * | 2012-12-25 | 2013-03-27 | 广东盈动高科自动化有限公司 | Capacitive rotary encoder allowing axial movement of transmission shaft |
-
2016
- 2016-09-09 CN CN201610815255.2A patent/CN107806891A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62253786A (en) * | 1986-04-25 | 1987-11-05 | Hitachi Ltd | Device for dry etching |
| EP2527796A2 (en) * | 2011-05-27 | 2012-11-28 | Siemens Aktiengesellschaft | Capacitive rotary encoder and method for sensing a rotation angle |
| CN102798405A (en) * | 2011-05-27 | 2012-11-28 | 西门子公司 | Capacitance type rotary encoder and method for sensing rotation angle |
| CN102998478A (en) * | 2012-12-25 | 2013-03-27 | 广东盈动高科自动化有限公司 | Capacitive rotary encoder allowing axial movement of transmission shaft |
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Application publication date: 20180316 |
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