CN109660050A - A kind of motor stator and driving motor - Google Patents
A kind of motor stator and driving motor Download PDFInfo
- Publication number
- CN109660050A CN109660050A CN201811295617.5A CN201811295617A CN109660050A CN 109660050 A CN109660050 A CN 109660050A CN 201811295617 A CN201811295617 A CN 201811295617A CN 109660050 A CN109660050 A CN 109660050A
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- coil
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- coil windings
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- rotor
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
Abstract
The invention discloses a kind of motor stator, including stator core, stator winding and at least one Hall sensor, stator winding winding is arranged on the lateral surface of stator core, and Hall sensor is arranged on the end face of stator core one end；The through-hole that the center of stator core is equipped with, through-hole are arranged along the axial direction of stator core；Also disclose a kind of driving motor, including motor stator, rotor and casing, motor stator is above-mentioned motor stator, and rotor is set on motor stator, rotor is equipped with magnetic part close to the inner ring of motor stator, and magnetic part and rotor rotate synchronously；Hall sensor on motor stator is used to detect position and the revolving speed of rotor；The through-hole being arranged among stator core of the present invention can be such that stator core directly connect with external device (ED), facilitate fixation, saves space, and the outside of motor stator is arranged in rotor, the inside of rotor is arranged in stator winding, and the torque of rotor can be improved.
Description
Technical field
The present invention relates to technical field of motors more particularly to a kind of motor stators and driving motor.
Background technique
Motor is to generate motoricity by magnetic interaction, and motor mainly includes stator and rotor, and stator is motor
Stationary part.Stator is made of stator core, stator winding and base three parts.The main function of stator is to generate rotation
Turn magnetic field, and the main function of rotor is to generate electric current in turn by magnetic force line cutting in rotating excitation field.In the mistake of production stator
Cheng Zhong, conventional motors are stators including outer rotor, and this design torque is smaller, in addition, stator winding is first wound with mold,
Then manually winding is embedded in stator slot, since stator interior space is small, coiling is inconvenient, low efficiency.
Existing motor is usually fixed at it by the base on driving motor when being used together with other equipment
In his equipment, be not only inconvenient to fix, but also occupied space is larger.
Summary of the invention
In order to solve the above-mentioned technical problem, point, motor stator disclosed by the invention facilitate fixation in view of the above problems, and
Space is saved, high-efficient convenient for the winding of stator winding, disclosed driving motor is easy to use, and can improve rotor
Torque improves working efficiency.
In order to achieve the above object of the invention, the present invention provides a kind of motor stator, including stator core, stator winding and
At least one Hall sensor, the stator winding winding are arranged on the lateral surface of the stator core, the hall sensing
Device is arranged on the end face of described stator core one end；
The through-hole that the center of the stator core is equipped with, axial direction setting of the through-hole along the stator core.
Further, the lateral surface of the stator core is equipped with support frame, and the stator winding is arranged in the branch
On support bone frame, the support frame is used to support the stator winding.
Preferably, the through-hole on the stator core is cylindrical hole, and the support frame is laminated structure group
At hollow cylinder structure.
Preferably, there are three the Hall sensor is set, the Hall sensor is uniformly arranged on the stator core
On end face on the outside of the via openings portion.
Further, three Hall sensors are evenly distributed on the stator core end face 360 ° of electric degree angles
In range, the angle between Hall sensor described in every two is 120 ° of electric degree angles.
Further, the stator winding includes coil windings A, coil windings B and coil windings C, the coil windings
A, the coil windings B and the coil windings C are individually present, and are connected between the coil windings A and the coil windings B,
It is connected between the coil windings A and the coil windings C, is connected between the coil windings B and the coil windings C.
Further, the coil windings A includes loop A a, loop A b, loop A c and loop A d, the coil windings
B includes that coil Ba, coil Bb, coil Bc and coil Bd, the coil windings C include coil Ca, coil Cb, coil Cc and coil
Cd；
The loop A a and loop A c is around to identical, and the loop A b and the loop A d are around to identical, the line
The Aa or loop A c and the loop A b or loop A d are enclosed around to opposite；
The coil Ba and coil Bc is around to identical, and the coil Bb and the coil Bd are around to identical, the line
The Ba or coil Bc and the coil Bb or coil Bd are enclosed around to opposite；
The coil Ca and coil Cc is around to identical, and the coil Cb and the coil Cd are around to identical, the line
The Ca or coil Cc and the coil Cb or coil Cd are enclosed around to opposite.
Preferably, the coil windings A, the coil windings B and the coil windings C connect into Y-shaped circuit, described
It is connected, is connected between the coil windings A and the coil windings C, the line between coil windings A and the coil windings B
It is connected between the circle winding B and coil windings C.
The present invention provides a kind of driving motor, including motor stator, rotor and casing, the motor stator is upper
The motor stator is stated, the rotor is set on the motor stator, and the rotor is close to the motor
The inner ring of stator is equipped with magnetic part, and the magnetic part and the rotor rotate synchronously；
The Hall sensor on the motor stator is used to detect position and the revolving speed of the rotor.
Further, between the stator winding on the magnetic part and the motor stator on the rotor
Equipped with air gap, the air gap is for the coupling between the stator winding energization magnetic field generated and the magnetic field of magnetic part generation
It closes.
The implementation of the embodiments of the present invention has the following beneficial effects:
1, stator winding is directly wound on the lateral surface of stator core by motor stator disclosed by the invention, is convenient for stator
The winding of winding, and it is high-efficient, the through-hole being arranged among stator core not only can reduce the weight of stator core, may be used also
So that stator core is directly connect with external device (ED), facilitates fixed and save space；
2, rotor, is arranged in the outside of motor stator by driving motor disclosed by the invention, and stator winding setting exists
The torque of rotor can be improved in the inside of rotor；
3, driving motor disclosed by the invention, easy to use, installation effectiveness is high, and can improve the torque of rotor, mentions
High working efficiency.
Detailed description of the invention
It, below will be to required for embodiment in order to illustrate more clearly of motor stator of the present invention and driving motor
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural schematic diagram of motor stator of the present invention；
Fig. 2 is the integrated structure schematic diagram of motor stator of the present invention and rotor；
Fig. 3 is the cross section structure schematic diagram of Fig. 2；
Fig. 4 is the DC driven line graph of stator winding of the present invention；
Fig. 5 is the magnetic flux density figure that stator winding generates；
Wherein, appended drawing reference is corresponding in figure are as follows:
1- stator core, 101- through-hole, 2- stator winding, 201- loop A a, 202- loop A b, 203- loop A c, 204-
Loop A d, 205- coil Ba, 206- coil Bb, 207- coil Bc, 208- coil Bd, 209- coil Ca, 210- coil Cb, 211-
Coil Cc, 212- coil Cd, 3- Hall sensor, 4- support frame, 5- rotor, 6- magnetic part, 7- air gap.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
Embodiment 1:
It is as shown in Figure 1 and Figure 4: a kind of motor stator, including stator core 1, stator winding 2 and at least one hall sensing
Device 3, the winding of stator winding 2 are arranged on the lateral surface of the stator core 1, and the Hall sensor 3 is arranged described
On the end face of 1 one end of stator core；
The through-hole 101 that the center of the stator core 1 is equipped with, the through-hole 101 are set along the axial direction of the stator core 1
It sets；Stator winding 2 is directly wound on the lateral surface of stator core 1 by the present invention, convenient for the winding of stator winding 2, and it is high-efficient,
The through-hole 101 being arranged among stator core 1, not only can reduce the weight of stator core 1, and stator core 1 can also be made straight
It connects and is connect with external device (ED), facilitate fixed and save space.
Specifically, the lateral surface of the stator core 1 is equipped with support frame 4, the stator winding 2 is arranged in the branch
On support bone frame 4, the support frame 4 is used to support the stator winding 2；This design is convenient for the winding of stator winding 2 and is consolidated
It is fixed.
Preferably, there are three the Hall sensor 3 is set, the Hall sensor 3 is uniformly arranged on the stator core 1
On end face on the outside of upper 101 opening portion of through-hole；
Further, three Hall sensors 3 are evenly distributed on 360 ° of electric degree angles on 1 end face of stator core
In the range of, the angle between Hall sensor 3 described in every two is 120 ° of electric degree angles.
Specifically, the stator winding 2 include coil windings A, coil windings B and coil windings C, the coil windings A,
The coil windings B and the coil windings C are individually present, and are connected between the coil windings A and the coil windings B, institute
It states and is connected between coil windings A and the coil windings C, be connected between the coil windings B and the coil windings C.
Further, the coil windings A includes loop A a201, loop A b202, loop A c203 and loop A d204,
The coil windings B includes coil Ba205, coil Bb206, coil Bc207 and coil Bd208, and the coil windings C includes line
Enclose Ca209, coil Cb210, coil Cc211 and coil Cd212；
The loop A a201 and loop A c203 around to identical, the loop A b202 and the loop A d204 around to
Identical, the loop A a201 or the loop A c203 and the loop A b202 or loop A d204 are around to opposite；
The coil Ba205 and coil Bc207 around to identical, the coil Bb206 and the coil Bd208 around to
Identical, the coil Ba205 or the coil Bc207 and the coil Bb206 or coil Bd208 are around to opposite；
The coil Ca209 and coil Cc211 around to identical, the coil Cb210 and the coil Cd212 around to
Identical, the coil Ca209 or the coil Cc211 and the coil Cb210 or coil Cd212 are around to opposite；
Specifically, adding driving voltage appropriate on coil windings A, coil windings B and coil windings C, that is, can produce
Magnetic field.
Embodiment 2:
It is as shown in Figure 1 and Figure 4: a kind of motor stator, including stator core 1, stator winding 2 and at least one hall sensing
Device 3, the winding of stator winding 2 are arranged on the lateral surface of the stator core 1, and the Hall sensor 3 is arranged described
On the end face of 1 one end of stator core；
The through-hole 101 that the center of the stator core 1 is equipped with, the through-hole 101 are set along the axial direction of the stator core 1
It sets；Stator winding 2 is directly wound on the lateral surface of stator core 1 by the present invention, convenient for the winding of stator winding 2, and it is high-efficient,
The through-hole 101 being arranged among stator core 1, not only can reduce the weight of stator core 1, and stator core 1 can also be made straight
It connects and is connect with external device (ED), facilitate fixed and save space.
Specifically, the lateral surface of the stator core 1 is equipped with support frame 4, the stator winding 2 is arranged in the branch
On support bone frame 4, the support frame 4 is used to support the stator winding 2；This design is convenient for the winding of stator winding 2 and is consolidated
It is fixed.
Preferably, the through-hole 101 on the stator core 1 is cylindrical hole 101, and the support frame 4 is piece
The hollow cylinder structure of shape structure composition, further, size thickness of each laminated structure etc. is all the same, passes through setting
Laminated structure the more convenient stator winding 2 of support frame 4 in each coil winding, the distribution of coil can also be made more equal
Even, magnetic field is more stable.
Preferably, there are three the Hall sensor 3 is set, the Hall sensor 3 is uniformly arranged on the stator core 1
On end face on the outside of upper 101 opening portion of through-hole；
Further, three Hall sensors 3 are evenly distributed on 360 ° of electric degree angles on 1 end face of stator core
In the range of, the angle between Hall sensor 3 described in every two is 120 ° of electric degree angles.
Specifically, the stator winding 2 include coil windings A, coil windings B and coil windings C, the coil windings A,
The coil windings B and the coil windings C are individually present, and are connected between the coil windings A and the coil windings B, institute
It states and is connected between coil windings A and the coil windings C, be connected between the coil windings B and the coil windings C.
Further, the coil windings A includes loop A a201, loop A b202, loop A c203 and loop A d204,
The coil windings B includes coil Ba205, coil Bb206, coil Bc207 and coil Bd208, and the coil windings C includes line
Enclose Ca209, coil Cb210, coil Cc211 and coil Cd212；
The loop A a201 and loop A c203 around to identical, the loop A b202 and the loop A d204 around to
Identical, the loop A a201 or the loop A c203 and the loop A b202 or loop A d204 are around to opposite；
The coil Ba205 and coil Bc207 around to identical, the coil Bb206 and the coil Bd208 around to
Identical, the coil Ba205 or the coil Bc207 and the coil Bb206 or coil Bd208 are around to opposite；
The coil Ca209 and coil Cc211 around to identical, the coil Cb210 and the coil Cd212 around to
Identical, the coil Ca209 or the coil Cc211 and the coil Cb210 or coil Cd212 are around to opposite；
Preferably, the coil windings A, the coil windings B and the coil windings C connect into Y-shaped circuit, described
It is connected, is connected between the coil windings A and the coil windings C, the line between coil windings A and the coil windings B
It is connected between the circle winding B and coil windings C.
Specifically, add corresponding driving voltage U, W, V respectively on coil windings A, coil windings B and coil windings C,
It can produce corresponding magnetic field.
Difference from example 1 is that:
The through-hole 101 on the stator core 1 is cylindrical hole 101, and the support frame 4 is laminated structure group
At hollow cylinder structure, further, size thickness of each laminated structure etc. is all the same, passes through the sheet knot of setting
The winding of each coil, can also make the distribution of coil more uniform, magnetic field in the more convenient stator winding 2 of support frame 4 of structure
It is more stable.
The coil windings A, the coil windings B and the coil windings C connect into Y-shaped circuit, the coil around
It is connected, is connected between the coil windings A and the coil windings C, the coil windings B between the group A and coil windings B
It is connected between the coil windings C.
Embodiment 3
As shown in Figures 1 to 4, a kind of driving motor, including motor stator, rotor 5 and casing, the motor stator
Embodiment 1 to rotor 5 as described in example 2 is set on the motor stator, and the rotor 5 is close to the electricity
The inner ring of machine stator is equipped with magnetic part 6, and the magnetic part 6 is rotated synchronously with the rotor 5；
The Hall sensor 3 on the motor stator is used to detect position and the revolving speed of the rotor 5；This hair
The bright outside that rotor 5 is arranged in motor stator, stator winding 2 are arranged in the inside of rotor 5, motor can be improved
The torque of rotor 5.
Specifically, magnetic part 6 is permanent magnet, permanent magnet is equipped at least a pair, each permanent magnet and is equipped with corresponding coil.
Further, the magnetic part 6 on the rotor 5 and the stator winding 2 on the motor stator
Between be equipped with air gap 7, the air gap 7 for the stator winding 2 excitation generate magnetic field and the magnetic part 6 generate magnetic field
Between coupling.
Embodiment 4: for the preferred embodiment of embodiment 3,
As shown in Figures 1 to 4, a kind of driving motor, including motor stator, rotor 5 and casing, the motor stator
Embodiment 1 to rotor 5 as described in example 2 is set on the motor stator, and the rotor 5 is close to the electricity
The inner ring of machine stator is equipped with magnetic part 6, and the magnetic part 6 is rotated synchronously with the rotor 5；
The Hall sensor 3 on the motor stator is used to detect position and the revolving speed of the rotor 5；This hair
The bright outside that rotor 5 is arranged in motor stator, stator winding 2 are arranged in the inside of rotor 5, motor can be improved
The torque of rotor 5；
Specifically, magnetic part 6 is permanent magnet, permanent magnet is equipped with two pairs, and each permanent magnet corresponds to three coils, every a pair of phase
Adjacent S, N permanent magnet, corresponding 360 electric degree angles can reflect the position of permanent magnet.
Further, the magnetic part 6 on the rotor 5 and the stator winding 2 on the motor stator
Between be equipped with air gap 7, the air gap 7 for the stator winding 2 excitation generate magnetic field and the magnetic part 6 generate magnetic field
Between coupling.
Working principle: for Fig. 4, being connected into Y-shaped circuit for coil windings A, coil windings B and coil windings C, according to
The output state of Hall sensor allows loop A, B, C to communicate two-by-two；And respectively add driving voltage U, W, V.Rotor 5 is inverse
Hour hands rotation, rotor rotate 180 ° of mechanical angles and are equivalent to 360 ° of electric degree angles due to mechanical symmetrical structure.If hall sensing
It is 1 that device 3, which is output state in face of the pole S, and in 360 ° of electric degree angles, three spacing are that the Hall sensor 3 at 120 ° of electric degree angles produces
6 states are given birth to, wherein three Hall sensor peaces from top to bottom, are followed successively by H1, H2 and H3 clockwise as in Fig. 3；This
When driving motor counter clockwise direction driver' s timing table it is as follows:
By taking 1 state of timing in table as an example, exciting current is flowed into from coil windings A, and coil windings C outflow, coil windings B is closed
It closes, without electric current.At this point, corresponding loop A a201 and loop A c203, coil Ca209 and coil Cc211 are passed through forward current, line
Ab202 and loop A d204 is enclosed, coil Cb210 and coil Cd212 are passed through reverse current, other coils do not have electric current.Stator at this time
The magnetic flux density that winding 2 generates is determined as shown in figure 5, for the magnetic part 6 (being herein permanent magnet) being fixed on rotor 5
The magnetic field that sub- winding 2 generates can generate a lasting magnetic force counterclockwise.When stator winding 2 is according to driving motor counter clockwise direction
When timing shown in driver' s timing table applies driving voltage, driving motor will generate a lasting anti-clockwise torque.
The preferred embodiment of the present invention has shown and described in above description, as previously described, it should be understood that the present invention is not office
Be limited to form disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, modification and
Environment, and can be changed within that scope of the inventive concept describe herein by the above teachings or related fields of technology or knowledge
It is dynamic.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be appended by the present invention
In scope of protection of the claims.
Claims (10)
1. a kind of motor stator, it is characterised in that: including stator core (1), stator winding (2) and at least one Hall sensor
(3), stator winding (2) winding is arranged on the lateral surface of the stator core (1), Hall sensor (3) setting
On the end face of the stator core (1) one end；
The through-hole (101) that the center of the stator core (1) is equipped with, axial direction of the through-hole (101) along the stator core (1)
Setting.
2. motor stator according to claim 1, it is characterised in that: the lateral surface of the stator core (1) is equipped with branch
Support bone frame (4), the stator winding (2) are arranged on the support frame (4), and the support frame (4) is used to support described
Stator winding (2).
3. motor stator according to claim 2, it is characterised in that: the through-hole (101) on the stator core (1)
For cylindrical hole (101), the support frame (4) is the hollow cylinder structure of laminated structure composition.
4. motor stator according to claim 1, it is characterised in that: there are three the Hall sensor (3) sets, it is described suddenly
You are uniformly arranged on the end face on the stator core (1) on the outside of through-hole (101) opening portion sensor (3).
5. motor stator according to claim 4, it is characterised in that: three Hall sensors (3) are evenly distributed on
On stator core (1) end face in the range of 360 ° of electric degree angles, the angle between Hall sensor described in every two (3) is
120 ° of electric degree angles.
6. motor stator according to claim 1, it is characterised in that: the stator winding (2) includes coil windings A, line
Circle winding B and coil windings C, the coil windings A, the coil windings B and the coil windings C are individually present, the line
It is connected, is connected between the coil windings A and the coil windings C, the coil between the circle winding A and coil windings B
It is connected between winding B and the coil windings C.
7. motor stator according to claim 6, it is characterised in that: the coil windings A includes loop A a (201), line
Circle Ab (202), loop A c (203) and loop A d (204), the coil windings B include coil Ba (205), coil Bb (206),
Coil Bc (207) and coil Bd (208), the coil windings C include coil Ca (209), coil Cb (210), coil Cc (211)
With coil Cd (212)；
The loop A a (201) and the loop A c (203) are around to identical, the loop A b (202) and the loop A d (204)
Around to identical, the loop A a (201) or the loop A c (203) and the loop A b (202) or the loop A d (204) around
To opposite；
The coil Ba (205) and the coil Bc (207) are around to identical, the coil Bb (206) and the coil Bd (208)
Around to identical, the coil Ba (205) or the coil Bc (207) and the coil Bb (206) or the coil Bd (208) around
To opposite；
The coil Ca (209) and the coil Cc (211) are around to identical, the coil Cb (210) and the coil Cd (212)
Around to identical, the coil Ca (209) or the coil Cc (211) and the coil Cb (210) or the coil Cd (212) around
To opposite.
8. motor stator according to claim 7, it is characterised in that: the coil windings A, the coil windings B and institute
It states coil windings C and connects into Y-shaped circuit, be connected between the coil windings A and the coil windings B, the coil windings A
It is connected between the coil windings C, is connected between the coil windings B and the coil windings C.
9. a kind of driving motor, including motor stator, rotor (5) and casing, the motor stator is appointed for claim 1-8
Motor stator described in meaning one, it is characterised in that: the rotor (5) is set on the motor stator, the electricity
Machine rotor (5) is equipped with magnetic part (6) close to the inner ring of the motor stator, and the magnetic part (6) and the rotor (5) are same
Step rotation；
The Hall sensor (3) on the motor stator is used to detect position and the revolving speed of the rotor (5).
10. driving motor according to claim 9, it is characterised in that: the magnetic part on the rotor (5)
(6) between the stator winding (2) and on the motor stator be equipped with air gap (7), the air gap (7) for the stator around
The coupling between magnetic field that group (2) the excitation magnetic field generated and the magnetic part (6) generate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295617.5A CN109660050A (en) | 2018-11-01 | 2018-11-01 | A kind of motor stator and driving motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295617.5A CN109660050A (en) | 2018-11-01 | 2018-11-01 | A kind of motor stator and driving motor |
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| Publication Number | Publication Date |
|---|---|
| CN109660050A true CN109660050A (en) | 2019-04-19 |
Family
ID=66110067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811295617.5A Pending CN109660050A (en) | 2018-11-01 | 2018-11-01 | A kind of motor stator and driving motor |
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| CN (1) | CN109660050A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020088052A1 (en) * | 2018-11-01 | 2020-05-07 | 贝兹维仪器(苏州)有限公司 | Electromagnetic drive motor and rotary steering drilling tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020088052A1 (en) * | 2018-11-01 | 2020-05-07 | 贝兹维仪器(苏州)有限公司 | Electromagnetic drive motor and rotary steering drilling tool |
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