CN102645547B - Speed sensor and speed-measuring system of traction motor rotor - Google Patents
Speed sensor and speed-measuring system of traction motor rotor Download PDFInfo
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- CN102645547B CN102645547B CN201210116605.8A CN201210116605A CN102645547B CN 102645547 B CN102645547 B CN 102645547B CN 201210116605 A CN201210116605 A CN 201210116605A CN 102645547 B CN102645547 B CN 102645547B
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- transmission cable
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- speed
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Abstract
The invention provides a speed sensor comprising a probe assembly, a bent head shell and a transmission cable. The probe assembly comprises a printed circuit board, a positioning piece and two Hall elements; the bent head shell comprises a shell head part with a bent structure, and a shell tail sleeve; the probe assembly is mounted at the shell head part and the transmission cable is arranged in the bent head shell; and one end of the transmission cable is welded with the printed circuit board of the probe assembly and the other end of the transmission cable extends to the outside of the bent head shell. The invention further provides a speed-measuring system of a traction motor rotor using the speed sensor. The speed sensor disclosed by the invention has a simple and reliable structure and a contour dimension of the speed sensor can meet the requirements of an installation dimension of a traction motor of a locomotive; and the speed-measuring system of the traction motor rotor using the speed sensor has higher induction sensitivity.
Description
Technical field
The invention belongs to traction electric machine rotor to test the speed field, particularly relate to a kind of speed pickup and a kind of traction electric machine rotor velocity-measuring system.
Background technology
On rail vehicle, precision and the reliability of the rate signal that it collects are depended in the control of automotive power to a great extent, and the rate signal gathered comprises the variable quantity of current speed value and speed.In the traction control of locomotive, wheel skid protection, Train Control, Car's door controlling process, all will relate to the acquisition problems of rate signal, it is generally completed by many speed pickups.
Speed pickup type the most frequently used is at present Hall-type binary channels speed pickup, and its principle is: difference speed pickup coordinates with gear and is applicable to produce two-way and is shifted square-wave signal, and the pulsed frequency simultaneously produced is directly proportional to gear rotational speed.Its sensing element is two magnetic bias Hall components and parts, connects with amplifier and short protection circuit driver.The structure of speed pickup conventional at present as shown in Figure 1, generally adopt in 180 ° of angle design between their metal shell probe and tail overlap, metal shell is easy to processing on the one hand, has design maximum space, is also beneficial to the installation between printed circuit board (PCB) and transmission cable.And the traction electric machine of light rail locomotive, because down suction between its electric motor end cap and bearing (ball) cover is less, adopt the speed pickup profile installation dimension of 180 ° of angle designs cannot meet its installation requirement.
Summary of the invention
The invention solves the technical matters that prior art medium velocity sensor can not be applicable to the requirement of locomotive traction motor installation dimension.
The invention provides a kind of speed pickup, comprise probe assembly, elbow shell and transmission cable; Described probe assembly comprises printed circuit board (PCB), keeper and 2 Hall components and parts; One end of described keeper is by slot and printed circuit board (PCB) clamping, and the other end is by connecting hole and the clamping of 2 Hall components and parts, and the metal pin of 2 Hall components and parts welds with printed circuit board (PCB) through keeper;
Described elbow shell comprises case head and the shell tail cover of bending structure, and probe assembly is installed on case head, and transmission cable is arranged in elbow shell; One end of transmission cable is welded with the printed circuit board of probe assembly, and the other end extends to elbow housing exterior.
As a further improvement on the present invention, described Hall components and parts and magnet become one the chip of structure.
As a further improvement on the present invention, case head and shell tail overlap between bending angle be 90 °.
As a further improvement on the present invention, the hole for injecting glue for encapsulating is equipped with between the outer wall of described printed circuit board (PCB) and the inwall of elbow shell and between the outer wall of keeper and the inwall of elbow shell.
As a further improvement on the present invention, thermal plastic insulation is filled with by hole for injecting glue in elbow shell.
As a further improvement on the present invention, the heart yearn of described transmission cable is positioned at the center of elbow shell.
Present invention also offers a kind of traction electric machine rotor velocity-measuring system, comprise the hard-wired speed pickup with locomotive traction motor; Wherein, described speed pickup is speed pickup provided by the invention, and the case head of described speed pickup is alignd with the gear centre of locomotive traction motor.
Speed pickup provided by the invention, simple and reliable for structure, additionally by adopting the sensor outer housing with bending structure, make the physical dimension of speed pickup provided by the invention can meet the installation dimension requirement of light rail locomotive traction motor.
Traction electric machine rotor velocity-measuring system provided by the invention, by adopting speed pickup provided by the invention, ensures that case head is alignd with the gear centre of locomotive traction motor, effectively can improve the induction sensitivity of product simultaneously.
Accompanying drawing explanation
The structural representation of the speed pickup that Fig. 1 provides for prior art.
Fig. 2 is the structural representation of speed pickup provided by the invention.
Fig. 3 is the structural representation of elbow shell in speed pickup provided by the invention.
Fig. 4 is the structural representation of speed pickup housing tail cable provided by the invention and stainless steel fixing sleeve, copper fixing sleeve.
Fig. 5 is traction electric machine rotor velocity-measuring system structural representation provided by the invention.
Wherein, 1---Hall components and parts, 2---keeper, 3---printed circuit board (PCB), 4---hole for injecting glue, 5---elbow shell, 6---transmission cable, 7---the gear of locomotive traction motor, 8---stainless steel fixing sleeve, 9---brass fixing sleeve; 51---case head, 52---shell tail cover.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 2, the invention provides a kind of speed pickup, comprise probe assembly, elbow shell 5 and transmission cable 6.Described probe assembly comprises printed circuit board (PCB) 3, keeper 2 and 2 Hall components and parts 1.One end of described keeper 2 is by slot and printed circuit board (PCB) 3 clamping, and the other end is by connecting hole and the clamping of 2 Hall components and parts 1.Keeper 2 is provided with through hole, and the metal pin of 2 Hall components and parts 1 welds with printed circuit board (PCB) 3 through the through hole on keeper 2.
As shown in Figure 3, described elbow shell 5 comprises case head 51 and the shell tail cover 52 of bending structure.Probe assembly is installed on case head 51.Transmission cable 6 is arranged in elbow shell 5.One end of transmission cable 6 is welded with the printed circuit board 3 of probe assembly, and the other end extends to the outside of elbow shell 5.Under preferable case, as shown in Figure 2 or Figure 3, case head 51 and shell tail overlap the bending angle between 52 is 90 °.Case head 51 and shell tail overlap 52 between bending angle when being 90 °, maximizedly can utilize the down suction between electric motor end cap and bearing (ball) cover, therefore make speed pickup of the present invention be applicable to the traction electric machine of light rail locomotive; In addition, be also convenient to metal shell machining, and now transmission cable 6 and car body are installed also the most applicable.
In the present invention, described Hall components and parts 1 are the chip of structure of becoming one with magnet.By integrated design, chip can be reduced and taken up space, greatly reduce the difficulty of mounting process.
Shown keeper 2 can adopt various engineering plastics keepers conventional in prior art, and its one end is provided with slot, and for clamping printed circuit board (PCB) 3, the other end is provided with connecting hole, for clamping Hall components and parts 1.Described elbow shell 5 can adopt stainless steel casing conventional in prior art.
In the present invention, be equipped with the hole for injecting glue 4 for encapsulating between the outer wall of described printed circuit board (PCB) 3 and the inwall of elbow shell 5 and between the outer wall of keeper 2 and the inwall of elbow shell 5, as shown in Figure 2.Namely by pouring into thermal plastic insulation in described hole for injecting glue 4, making thermal plastic insulation enter elbow shell 5 inside and solidify, ensureing the sealing property of product, heat radiation, against shock and Electro Magnetic Compatibility, improving machinery and the electric property of product.
As a kind of preferred implementation of the present invention, as shown in Figure 2, the heart yearn of described transmission cable 6 is positioned at the center of elbow shell 5, effectively can ensure the dielectric voltage withstand performance of speed pickup.As shown in Figure 4, described transmission cable 6 is overlapped 52 places at shell tail and is locked by stainless steel fixing sleeve 8 and brass fixing sleeve 9 interference fit.
The present inventor finds, speed pickup provided by the invention is by adopting the structural design of elbow shell 5, speed pickup not only can be made to meet the less installation dimension requirement in down suction between electric motor end cap and bearing (ball) cover, and this kind of version is in parastate with car body bearing when making transmission cable 6 install fixing under car, be convenient to transmission cable 6 on bearing fix and the jerk that transmission cable 6 is subject to when locomotive operation affects minimum.
After adopting the structural design of elbow shell 5, mainly produce the impact of following 2 aspects: 1, printed circuit board (PCB) 3 makes: because speed pickup provided by the invention is short compared with the probe of conventional motor speed sensor, therefore printed circuit board (PCB) 3 can fracture into 2 sections when making, and is arranged on probe and the shell place with probe vertical respectively; Also by reduce on printed circuit board (PCB) 3 components and parts volume or change components and parts cabling, make printed circuit board (PCB) 3 structure compacter thus the length of printed circuit board (PCB) 3 can be reduced, to meet installation requirement.The present invention solves its installation question by adopting the structure of the latter's compact circuit plate.2, transmission cable 6 assembles: the heart yearn of transmission cable 6 be direct welding on a printed circuit, then extend to outside with elbow shell 5 bending 90 °, can realize by frock.Otherwise the elbow shell 5 of the heart yearn of transmission cable 6 distance metal is excessively near, and the dielectric voltage withstand performance of product can not be guaranteed.
As shown in Figure 5, present invention also offers a kind of traction electric machine rotor velocity-measuring system, comprise the hard-wired speed pickup with locomotive traction motor; Wherein, described speed pickup is speed pickup provided by the invention, and the Hall components and parts 1 of described speed pickup align with gear 7 center of locomotive traction motor.Traction electric machine rotor velocity-measuring system provided by the invention, has higher induction sensitivity.Particularly, described speed pickup is fixedly installed on the electric motor end cap of locomotive traction motor by screw and securing member.
Compared with prior art, speed pickup provided by the invention and traction electric machine rotor velocity-measuring system also have the following advantages:
1 adopts shielding, one point earth, signal integration, clean power supply measure, can meet the requirement of high security, high reliability, high maintenance performance and electromagnetic compatibility (EMC) performance that rolling stock runs.
2, components and parts printed circuit board (PCB) 3 adopting paster to encapsulate can effectively reduce the volume of sensor pcb 3, make that the structure of sensor probe assembly is compacter, volume is less, are convenient to the installation of speed pickup on locomotive traction motor.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. traction electric machine rotor tests the speed with a speed pickup, and it is characterized in that, described speed pickup comprises probe assembly, elbow shell and transmission cable; Described probe assembly comprises printed circuit board (PCB), keeper and 2 Hall components and parts; One end of described keeper is by slot and printed circuit board (PCB) clamping, and the other end is by connecting hole and the clamping of 2 Hall components and parts, and the metal pin of 2 Hall components and parts welds with printed circuit board (PCB) through keeper; Described elbow shell comprises case head and the shell tail cover of bending structure, and probe assembly is installed on case head, and transmission cable is arranged in elbow shell; One end of transmission cable is welded with the printed circuit board of probe assembly, and the other end extends to elbow housing exterior; Bending angle between case head and shell tail overlap is 90 °; Described Hall components and parts are the chip of structure of becoming one with magnet; The hole for injecting glue for encapsulating is equipped with between the outer wall of described printed circuit board (PCB) and the inwall of elbow shell and between the outer wall of keeper and the inwall of elbow shell; Thermal plastic insulation is filled with by hole for injecting glue in elbow shell; The heart yearn of described transmission cable is positioned at the center of elbow shell; Transmission cable is locked by stainless steel fixing sleeve and brass fixing sleeve interference fit at shell tail cover place.
2. a traction electric machine rotor velocity-measuring system, comprises the hard-wired speed pickup with locomotive traction motor; It is characterized in that, described speed pickup is that traction electric machine rotor according to claim 1 tests the speed with speed pickup, and the Hall components and parts of described speed pickup align with the gear centre of locomotive traction motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210116605.8A CN102645547B (en) | 2012-04-20 | 2012-04-20 | Speed sensor and speed-measuring system of traction motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210116605.8A CN102645547B (en) | 2012-04-20 | 2012-04-20 | Speed sensor and speed-measuring system of traction motor rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102645547A CN102645547A (en) | 2012-08-22 |
| CN102645547B true CN102645547B (en) | 2015-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210116605.8A Active CN102645547B (en) | 2012-04-20 | 2012-04-20 | Speed sensor and speed-measuring system of traction motor rotor |
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| CN (1) | CN102645547B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3251200B1 (en) * | 2015-01-28 | 2019-12-18 | Robert Bosch GmbH | Motor/pump assembly for a brake system |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160238628A1 (en) * | 2015-02-18 | 2016-08-18 | Electro-Motive Diesel, Inc. | Motor Speed Probe with Integral Accelerometers |
| CN107167622B (en) * | 2017-06-22 | 2023-08-08 | 中国工程物理研究院流体物理研究所 | Bent coaxial probe assembly |
| CN108535508A (en) * | 2018-04-01 | 2018-09-14 | 宁波依诺汽车电子有限公司 | A kind of Full-shielding automobile wheel speed sensor |
| CN108828257A (en) * | 2018-09-07 | 2018-11-16 | 株洲联诚集团控股股份有限公司 | A kind of motor-car velocity sensor |
| CN110161276B (en) * | 2019-04-29 | 2021-08-31 | 湖南联诚电气科技有限公司 | Speed sensor for rail vehicle traction motor |
| CN111487431A (en) * | 2020-06-03 | 2020-08-04 | 湖南联诚轨道装备有限公司 | Speed sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451968A (en) * | 2002-04-16 | 2003-10-29 | 住友电气工业株式会社 | Rotary measuring sensor |
| EP2220510B1 (en) * | 2007-12-04 | 2012-04-18 | Robert Bosch GmbH | Method for producing a magnetic field sensor and sensor produced according to said method |
| CN202661476U (en) * | 2012-04-20 | 2013-01-09 | 株洲电力机车电机修造有限公司 | Velocity sensor and traction motor rotor velocity measuring system |
-
2012
- 2012-04-20 CN CN201210116605.8A patent/CN102645547B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1451968A (en) * | 2002-04-16 | 2003-10-29 | 住友电气工业株式会社 | Rotary measuring sensor |
| EP2220510B1 (en) * | 2007-12-04 | 2012-04-18 | Robert Bosch GmbH | Method for producing a magnetic field sensor and sensor produced according to said method |
| CN202661476U (en) * | 2012-04-20 | 2013-01-09 | 株洲电力机车电机修造有限公司 | Velocity sensor and traction motor rotor velocity measuring system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3251200B1 (en) * | 2015-01-28 | 2019-12-18 | Robert Bosch GmbH | Motor/pump assembly for a brake system |
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| CN102645547A (en) | 2012-08-22 |
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Address after: 412000 Hunan Province, Zhuzhou Shifeng District Tian Xin North Gate Patentee after: Hunan Liancheng Electric Technology Co., Ltd Address before: 412001 Hunan Province, Zhuzhou Shifeng District Tian Xin North Gate Patentee before: ZHUZHOU POWER ENGINE AND MOTOR BUILD AND REPAIR Co.,Ltd. |
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