CN107070157A - A kind of automobile brake system brushless electric machine - Google Patents
A kind of automobile brake system brushless electric machine Download PDFInfo
- Publication number
- CN107070157A CN107070157A CN201710033039.7A CN201710033039A CN107070157A CN 107070157 A CN107070157 A CN 107070157A CN 201710033039 A CN201710033039 A CN 201710033039A CN 107070157 A CN107070157 A CN 107070157A
- Authority
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- China
- Prior art keywords
- rotor
- stator
- electric machine
- brushless electric
- brake system
- 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.)
- Pending
Links
- 238000007789 sealing Methods 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims description 22
- 239000010959 steel Substances 0.000 claims description 22
- 230000000694 effects Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
- H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
- H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
-
- 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
- H02K1/16—Stator cores with slots for windings
-
- 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
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
-
- 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
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Brushless Motors (AREA)
Abstract
The present invention relates to the technical field of brushless electric machine, a kind of particularly automobile brake system brushless electric machine, including：Casing, stator, rotor, drive end bearing bracket, rear end cap and rotating shaft, drive end bearing bracket and rear end cap are separately positioned on the rear and front end of casing, and set with casing sealing, stator press-loading is in casing, rotor is fixedly installed in rotating shaft, it is placed in stator interior, rotating shaft is rotated by the bearing being fixedly installed on drive end bearing bracket and rear end cap, the front end of rotating shaft is extended to outside casing through drive end bearing bracket, and pass through oil sealing sealing between drive end bearing bracket, rotating shaft afterbody is fixedly connected with encoder permanent magnet by non-magnetic support, rear end cap is embedded with the encoder for detecting motor rotor position, rotor length L2 is more than stator length L1, motor is equipped with waterproof vent valve and thermistor.A kind of automobile brake system brushless electric machine that the present invention is provided, rotor length, which is more than stator length, reduces end edge effect, improves power of motor density.
Description
Technical field
The present invention relates to brushless electric machine technical field, a kind of particularly automobile brake system brushless electric machine.
Background technology
Automobile brake system motor is operated in thump and shaken, paddle etc. than relatively rugged environment, in the prior art
By brushless electric machine replace brush motor overcome it is complicated, periodically need to change brush, carbon dust deposition, commutation interference in motor
The shortcomings of, although present brushless electric machine can accomplish waterproof and overcome strong impact force to shake, traditional brushless electric machine
Rotor length is equal with stator length, and stronger edge effect occurs in its end, and power of motor density is low.
The content of the invention
The technical problem to be solved in the present invention is：Traditional brushless electric motor rotor length is equal with stator length, its end
Stronger edge effect occurs, and power of motor density is low.The brushless electricity of a kind of automobile brake system that the present invention is provided
Machine, rotor length, which is more than stator length, reduces end edge effect, improves power of motor density.
The technical solution adopted for the present invention to solve the technical problems is：A kind of automobile brake system brushless electric machine, bag
Include：Casing, stator, rotor, drive end bearing bracket, rear end cap and rotating shaft, drive end bearing bracket and rear end cap are separately positioned on the rear and front end of casing,
And set with casing sealing, stator press-loading is in casing, and rotor is fixedly installed in rotating shaft, is placed in stator interior, and rotating shaft is led to
Cross the bearing being fixedly installed on drive end bearing bracket and rear end cap to rotate, the front end of rotating shaft is extended to outside casing, simultaneously through drive end bearing bracket
By oil sealing sealing between drive end bearing bracket, the rotating shaft afterbody is fixedly connected with permanent magnet, the rear end by non-magnetic support
Lid is embedded with the magnetic encoder of the magnetic field distribution for detecting permanent magnet, and the rotor length L2 is more than stator length
L1。
Specifically, two end points in above-mentioned rotor length direction are arranged between two end points in stator length direction.
Specifically, said machine casing and drive end bearing bracket integral type.
Specifically, in addition to for sealing the closure of the magnetic encoder, the closure is fixed with rear end cap to be connected
Connect.
Specifically, above-mentioned rear end cap is connected by the second sealing ring with seal cap sealing.
Specifically, in addition to：Thermistor, thermistor is arranged in stator slot.
Specifically, above-mentioned rear end cap is provided with least one for motor internal and ft connection or the waterproof isolated is saturating
Air valve.
Specifically, above-mentioned rear end cap is connected by the first sealing ring with casing sealing.
Specifically, above-mentioned rotor outer circle is salient-pole structure, and rotor is embedded with 8 circumferentially equally distributed rotor magnetic steels,
Stator has been uniformly distributed circumferentially 12 stator slots.
Specifically, above-mentioned rotor magnetic steel is oblique pole structure, and rotor magnetic steel relative stator groove tilts half of groove position.
The beneficial effects of the invention are as follows：
（1）A kind of automobile brake system brushless electric machine that the present invention is provided, it is saturating that the design of waterproof vent valve can play waterproof
The effect of gas, makes motor inside and outside air pressure balance while waterproof.
（2）A kind of automobile brake system brushless electric machine that the present invention is provided, oil sealing, the first sealing ring, the second sealing ring
Design cause motor that there is water-proof function so that motor can be operated in environment of paddling.
（3）A kind of automobile brake system brushless electric machine that the present invention is provided, rotor length is reduced more than stator length
End edge effect, improves power of motor density.
（4）A kind of automobile brake system brushless electric machine that the present invention is provided, rotor with salient pole structure and magnet steel embedded structure
Motor weak magnetism speed expansion can be made.
（5）A kind of automobile brake system brushless electric machine that the present invention is provided, unitary cover simplifies electric machine structure and carried
High motor reliability, can make motor be operated in thump vibration environment.
（6）A kind of automobile brake system brushless electric machine that the present invention is provided, the pole groove of motor coordinates and oblique pole structure drop
Low motor cogging torque, motor vibrations and noise.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of diagrammatic cross-section of automobile brake system brushless electric machine of the present invention；
Fig. 2 is the structure distribution schematic diagram of rotor magnetic steel；
Fig. 3 is the rigging position schematic diagram of the second sealing ring and magnetic encoder；
Fig. 4 is the first sealing ring rigging position schematic diagram；
In figure：1. oil sealing, 2. rotors, 21. rotor magnetic steels, 3. unitary covers, 4. stators, 41. stator slots, 5. first sealings
Circle, 6. second sealing rings, 7. closures, 8. magnetic encoders, 9. thermistors, 10. waterproof vent valves, 11. rear end caps, 111.
Bearing afterwards, 112 first seal grooves, 113. magnetic code tanks, 114. second seal grooves, 115. front-end bearing pedestals, bearing after 116.
Seat, 12. rotating shafts, 13. drive end bearing brackets, 131. fore bearings, 14. casings, 15. permanent magnets, 16. non-magnetic supports, L1. stator lengths,
L2. rotor length, L3. magnet steel length, T. magnet thicknesses, the distance of D1. rotor outer circles minimum point to center, the D2. salient poles center of circle
To the distance at center, the distance of D3. magnet steel bottom surface to center, R. salient pole radius of circles.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
As Figure 1-Figure 4, a kind of automobile brake system brushless electric machine, including：Casing 14, stator 4, rotor 2, front end
Lid 13, rear end cap 11 and rotating shaft 12, drive end bearing bracket 13 and rear end cap 11 are separately positioned on the rear and front end of casing 14, and with casing 14
Sealing is set, and stator 4 is fitted in casing 14, and rotor 2 is fixedly installed in rotating shaft 12, is placed in inside stator 4, and rotating shaft 12 is led to
Cross the fore bearing 131 being fixedly installed on drive end bearing bracket 13 and rear end cap 11 and rear bearing 111 is rotated, the fore bearing on drive end bearing bracket 13
Seat 115 is used to support the rear bearing block 116 on fore bearing 131, rear end cap 11 to be used for bearing 111, the front end of rotating shaft 12 after supporting
Extend to outside casing 14 and sealed by oil sealing 1 drive end bearing bracket 13 through drive end bearing bracket 13, the afterbody of rotating shaft 12 is led by non-
Magnetic support 16 is fixedly connected with permanent magnet 15, and rear end cap 11 is embedded with the magnetic of the magnetic field distribution for detecting permanent magnet 15
Encoder 8, the length L2 of rotor 2 is more than the length L1 of stator 4.
In a kind of specific embodiment, as shown in Fig. 2 the length L1 of motor stator 2 is 35mm, the length L2 of rotor 4 be 40mm,
The length L3 of rotor magnetic steel 21 be 12.3mm, the thickness T of rotor magnetic steel 21 be 3mm, the cylindrical minimum point of rotor 2 to center apart from D1
Apart from D2 it is that 7.35mm, the bottom surface of rotor magnetic steel 21 to center are 16.4 apart from D3 for 20.9mm, the salient pole center of circle to center
It is that 12, number of poles is that the 8, number of phases is 3, rated voltage 12V, rated current that mm, salient pole radius of circle R, which are 14.25mm, stator slot 41 is counted
When 56A, rated speed 2100rpm, nominal torque are that 2.7N/m, weak magnetic angle, θ are 70 degree, rotating speed 5430rpm, torque 0.8N,
Cogging torque be 15m N/m, motor can in environment of paddling normal work.
Magnetic encoder 8 is used for measurement motor corner and rotating speed, simple and compact for structure, and steady operation still is able under high speed.
Preferably, as shown in Fig. 2 two end points of the length direction of rotor 2 are arranged at two of the length direction of stator 4
Between end points.
In a kind of embodiment, casing 14 and the integral type of drive end bearing bracket 13, the drive end bearing bracket 13 and casing being wholely set
14 simplify electric machine structure and improve motor reliability, and motor can be made to be operated in thump vibration environment, and oil sealing 1 can be to prevent
Only the lubricating oil of outside motor make it that motor work is abnormal into motor internal, and the first sealing ring 5 can be with waterproof.
In a kind of embodiment, in addition to for sealing the closure 7 of magnetic encoder 8, closure 7 and rear end
Lid 11 is fixedly connected.
In a kind of embodiment, rear end cap 11 is tightly connected by the second sealing ring 6 and closure 7.
In a kind of embodiment, in addition to：Thermistor 9, thermistor 9 is in motor stator slot 41, heat
Quick resistance 9 is used to detect the temperature inside stator slot 41, and when detected temperature is too high, motor is stopped.
In a kind of embodiment, rear end cap 11 be provided with least one be used for motor internal and ft connection or
The waterproof vent valve 10 of isolation.Waterproof vent valve 10 can be used for the gas inside and outside connection motor, the liquid outside isolation motor.Waterproof
Vent valve 10 can be fixed on rear end cap 11 by modes such as screw-type, forced, buckle-type, toggle formulas.
In a kind of embodiment, rear end cap 11 is tightly connected by the first sealing ring 5 and casing 14.First sealing
The circle oil sealing 1 of the 5, second sealing ring 6 and closure 7 are sealed to whole motor jointly, play waterproof action.
In a kind of embodiment, cylindrical rotor 2 is salient-pole structure, and rotor 2 is embedded with 8 and is circumferentially uniformly distributed
Rotor magnetic steel 21, stator 4 has been uniformly distributed circumferentially 12 stator slots 41.
As shown in Fig. 2 it is salient-pole structure that rotor 2 is cylindrical, the cylindrical minimum point of rotor 2 to the distance at center is set to D1, salient pole
Radius of circle R and D1 ratio are 0.68, and the ratio apart from D2 and D1 at the cylindrical center of circle to the center of rotor 2 is 0.35, rotor magnetic steel
The ratio apart from D3 and D1 at 21 bottom surfaces to center is 0.78, and the thickness T and D1 of rotor magnetic steel 21 ratio are 0.38, rotor magnetic
The length L3 and D1 of steel 21 ratio are 4.1, and the length L1 and D1 of stator 4 ratio are 1.67, and rotor magnetic steel 21 is tied to be embedded
Structure, the length L2 and L1 of rotor 2 ratio are 1.67, and motor coordinates for the pole of 12 groove 8, the wrong 0.5 groove position of 2 relative stator of rotor 4.
The salient-pole structure of rotor 2 and the damascene structures of rotor magnetic steel 21, can make motor weak magnetism speed expansion, and motor is the pole of 12 groove 8
The brushless electric machine of cooperation, the structure that this pole groove coordinates reduces motor cogging torque.
In a kind of embodiment, rotor magnetic steel 21 is oblique pole structure, and the relative stator groove 41 of rotor magnetic steel 21 is tilted
Half of groove position.Rotor 2 reduces motor vibrations and noise for the design of oblique pole structure.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (10)
1. a kind of automobile brake system brushless electric machine, including：Casing（14）, stator（4）, rotor（2）, drive end bearing bracket（13）, after
End cap（11）And rotating shaft（12）, drive end bearing bracket（13）And rear end cap（11）It is separately positioned on casing（14）Rear and front end, and and machine
Shell（14）Sealing is set, stator（4）It is fitted in casing（14）It is interior, rotor（2）It is fixedly installed on rotating shaft（12）Above, it is placed in stator
（4）Inside, rotating shaft（12）By being fixedly installed on drive end bearing bracket（13）And rear end cap（11）On bearing rotate, rotating shaft（12）Before
Hold through drive end bearing bracket（13）Extend to casing（14）Outside and and drive end bearing bracket（13）Between pass through oil sealing（1）Sealing, its feature exists
In：The rotating shaft（12）Afterbody passes through non-magnetic support（16）It is fixedly connected with permanent magnet（15）, the rear end cap（11）It is embedded
Have for detecting permanent magnet（15）Magnetic field distribution magnetic encoder（8）, the rotor（2）Length L2 is more than stator
（4）Length L1.
2. a kind of automobile brake system brushless electric machine as claimed in claim 1, it is characterised in that：The rotor（2）Length
Two end points in direction are arranged at stator（4）Between two end points of length direction.
3. a kind of automobile brake system brushless electric machine as claimed in claim 1, it is characterised in that：The casing（14）With it is preceding
End cap（13）Integral type.
4. a kind of automobile brake system brushless electric machine as claimed in claim 1, it is characterised in that：Also include being used to seal institute
State magnetic encoder（8）Closure（7）, the closure（7）With rear end cap（11）It is fixedly connected.
5. a kind of automobile brake system brushless electric machine as claimed in claim 4, it is characterised in that：The rear end cap（11）It is logical
Cross the second sealing ring（6）With closure（7）It is tightly connected.
6. a kind of automobile brake system brushless electric machine as claimed in claim 1, it is characterised in that：Also include：Thermistor
（9）, the thermistor（9）It is fitted and fixed in motor stator slot.
7. a kind of automobile brake system brushless electric machine as claimed in claim 1, it is characterised in that：The rear end cap（11）If
Being equipped with least one is used for motor internal and ft connection or the waterproof vent valve isolated（10）.
8. a kind of automobile brake system brushless electric machine as claimed in claim 1, it is characterised in that：The rear end cap（11）It is logical
Cross the first sealing ring（5）With casing（14）It is tightly connected.
9. a kind of automobile brake system brushless electric machine as claimed in claim 1, it is characterised in that：The rotor（2）It is cylindrical
For salient-pole structure, the rotor（2）It is embedded with 8 circumferentially equally distributed rotor magnetic steels（21）, the stator（4）Circumferentially
It is evenly distributed with 12 stator slots（41）.
10. a kind of automobile brake system brushless electric machine as claimed in claim 9, it is characterised in that：The rotor magnetic steel
（21）For oblique pole structure, the rotor magnetic steel（21）Relative stator groove（41）Tilt half of groove position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710033039.7A CN107070157A (en) | 2017-01-18 | 2017-01-18 | A kind of automobile brake system brushless electric machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710033039.7A CN107070157A (en) | 2017-01-18 | 2017-01-18 | A kind of automobile brake system brushless electric machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107070157A true CN107070157A (en) | 2017-08-18 |
Family
ID=59597914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710033039.7A Pending CN107070157A (en) | 2017-01-18 | 2017-01-18 | A kind of automobile brake system brushless electric machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107070157A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621605A (en) * | 2017-09-30 | 2018-01-23 | 日本电产凯宇汽车电器（江苏）有限公司 | Motor fatigue test easy device |
| CN108964327A (en) * | 2018-09-07 | 2018-12-07 | 中山市胜洋电机有限公司 | A kind of waterproof stepper motor with magnetic coder |
| CN109742905A (en) * | 2018-12-20 | 2019-05-10 | 深圳市优必选科技有限公司 | A kind of electric machine assembly and steering engine |
| CN109742906A (en) * | 2019-01-25 | 2019-05-10 | 远景能源（江苏）有限公司 | A kind of magnetic coder and its installation method |
| CN110098678A (en) * | 2019-05-21 | 2019-08-06 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of brake system permanent magnetic brushless rotor structure |
| CN111327127A (en) * | 2018-12-14 | 2020-06-23 | 江苏联博精密科技有限公司 | High-efficiency novel stator design for automobile brake |
| JP7254146B1 (en) | 2021-11-15 | 2023-04-07 | 三菱電機株式会社 | Rotation detection device and rotary electric machine using the same |
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| CN204391927U (en) * | 2015-01-07 | 2015-06-10 | 昆山航天林泉电机有限公司 | A kind of built-in rotor weakening torque ripple |
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| CN106300813A (en) * | 2016-08-31 | 2017-01-04 | 日本电产凯宇汽车电器（江苏）有限公司 | Drive integrated car EPS brushless electric machine |
| CN206481201U (en) * | 2017-01-18 | 2017-09-08 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of automobile brake system brushless electric machine |
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2017
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| CN101257236A (en) * | 2007-03-01 | 2008-09-03 | 日本电产株式会社 | Motor |
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| CN205051481U (en) * | 2015-09-23 | 2016-02-24 | 南方泵业股份有限公司 | Motor with cooling structure |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107621605A (en) * | 2017-09-30 | 2018-01-23 | 日本电产凯宇汽车电器（江苏）有限公司 | Motor fatigue test easy device |
| CN107621605B (en) * | 2017-09-30 | 2024-02-20 | 尼得科凯宇汽车电器(江苏)有限公司 | Simple device for testing motor fatigue |
| CN108964327A (en) * | 2018-09-07 | 2018-12-07 | 中山市胜洋电机有限公司 | A kind of waterproof stepper motor with magnetic coder |
| CN111327127A (en) * | 2018-12-14 | 2020-06-23 | 江苏联博精密科技有限公司 | High-efficiency novel stator design for automobile brake |
| CN109742905A (en) * | 2018-12-20 | 2019-05-10 | 深圳市优必选科技有限公司 | A kind of electric machine assembly and steering engine |
| CN109742906A (en) * | 2019-01-25 | 2019-05-10 | 远景能源（江苏）有限公司 | A kind of magnetic coder and its installation method |
| CN109742906B (en) * | 2019-01-25 | 2020-08-14 | 远景能源（江苏）有限公司 | Magnetic encoder and installation method thereof |
| CN110098678A (en) * | 2019-05-21 | 2019-08-06 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of brake system permanent magnetic brushless rotor structure |
| CN110098678B (en) * | 2019-05-21 | 2024-04-19 | 尼得科凯宇汽车电器(江苏)有限公司 | Permanent magnet brushless motor rotor structure for braking system |
| JP7254146B1 (en) | 2021-11-15 | 2023-04-07 | 三菱電機株式会社 | Rotation detection device and rotary electric machine using the same |
| JP2023072759A (en) * | 2021-11-15 | 2023-05-25 | 三菱電機株式会社 | Rotation detection device and rotary electric machine using same |
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