CN204046362U - The online rotation-speed measuring device of electric motor built-in - Google Patents
The online rotation-speed measuring device of electric motor built-in Download PDFInfo
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- CN204046362U CN204046362U CN201420524277.XU CN201420524277U CN204046362U CN 204046362 U CN204046362 U CN 204046362U CN 201420524277 U CN201420524277 U CN 201420524277U CN 204046362 U CN204046362 U CN 204046362U
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- motor
- rotation
- measurement unit
- measuring device
- rotation speed
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Abstract
The utility model discloses the online rotation-speed measuring device of a kind of electric motor built-in, relate to tachometric survey field.Comprise fixed mechanism, rotation speed measurement unit, cable, interface socket, and electric machine casing, connection box for motor, external measurement devices, the rotating shaft of motor, metal gear, permanent magnet blocks.Rotation speed measurement unit is fixed to electric machine casing inside by fixed mechanism, rotation speed measurement unit be connected to through cable be fixedly mounted on connection box for motor place interface socket on, and connect various external measurement devices and carry out rotating speed on-line measurement.Rotation speed measurement unit detects and the tach signal transmitted is analog pulse signal.By rotation-speed measuring device and motor closely integrated, not fragile, can use at any time, real-time online measuring, structure is more simply compact, with low cost, interface is convenient, and antijamming capability strong, measure accurately, highly versatile, be suitable for most motor and rotating mechanism.
Description
Technical field
The utility model relates to tachometric survey field, particularly relates to the online rotation-speed measuring device of a kind of electric motor built-in.
Background technology
Rotating speed is the very important state parameter of motor and various rotating mechanism, all needs to be equipped with the rotating speed of corresponding rotation-speed measuring device to motor measure in a lot of workplace.At present conventional most modes adopt external rotation-speed measuring device, installs and uses inconvenience, and comparatively limit due to the environment and condition being subject to various production operation scene, and external measurement device possibly cannot be installed, or in use often easily damages.
From patent retrieval document, built-in rotation-speed measuring device is little, Chinese patent " a kind of integrated electric motor tachometric survey mechanism of electric motor end cap built-in sensors " (application number: the built-in sensors 201110334379.6) proposed, Hall sensor chip and circular circuit board are screwed in the circular heavy stand of end cap central, and for most of motor, motor shaft is through end cap, and therefore which can not use, poor universality; In addition, in this patent, circular circuit board is also put in motor internal, is easily disturbed, temperature is high, fragile, and is difficult to transform existing motor.
Summary of the invention
The purpose of this utility model be to provide a kind of closely integrated, not fragile with motor, can use at any time, the online rotation-speed measuring device of electric motor built-in of real-time online measuring; Overcome the shortcoming of prior art, make that structure is more simply compact, with low cost, interface is convenient, and antijamming capability strong, measure accurately, highly versatile, be suitable for most motor, and do not change the original design of motor, convenient transformation.
The utility model solves the technical scheme that its technical problem adopts:
The online rotation-speed measuring device of electric motor built-in comprises fixed mechanism (1), rotation speed measurement unit (2), cable (3), interface socket (4); Structurally, rotation speed measurement unit (2) is fixed to electric machine casing (5) inside by fixed mechanism (1); Rotation speed measurement unit (2) is connected to through cable (3) and is fixedly mounted on the interface socket (4) at connection box for motor (6) place, and interface socket (4) connects various external measurement devices (7).
Adopting said structure, can load when motor manufacturing, substantially need not change design of electrical motor, also can carry out improvement and installation easily to running motor simultaneously.
Interface socket (4) connects various external measurement devices (7), facilitates other intelligent instruments or control system directly to utilize, achieves on-line measurement, can monitor rotating speed in real time, at any time.
Cable (3) is shielding conductor, effectively improves the antijamming capability of measurement mechanism.
Rotation speed measurement unit (2) is Hall element or induction coil, and the tach signal detected is analog pulse signal.Main Basis magnetic field intensity, induced inside voltage or faradic Changing Pattern measure rotational speed pulse signal, pulse signal is still analog signal in essence, then under internal magnetic field interference, than employing digital data transmission, there is stronger antijamming capability when motor runs.
The mode generating rotational speed pulse signal can be provided with one or more metal gear (9) of prolonging even circumferential distribution in the rotating shaft of motor (8), along with rotating shaft (8) rotates; Rotation speed measurement unit (2) is just installed metal gear (9).Then in rotating shaft (8) rotary course, when the gear teeth of each metal gear (9) forward near rotation speed measurement unit (2), its inside will be made obviously to have a changes of magnetic field, produce the magnetic field intensity of reflection motor speed information, voltage or current impulse.
Alternatively, also one or more permanent magnet blocks (10) of prolonging even circumferential distribution can be installed in the rotating shaft (8) of motor, along with rotating shaft (8) rotates; Rotation speed measurement unit (2) is just installed permanent magnet blocks (11).Then in rotating shaft (8) rotary course, when each permanent magnet blocks (10) forwards near rotation speed measurement unit (2), its inside can be made equally obviously to have a changes of magnetic field, produce the magnetic field intensity of reflection motor speed information, voltage or current impulse.In order to effectively save motor internal space, permanent magnet blocks (10) can be made concordant with rotating shaft (8), embedding rotating shaft (8) and installing.
Compared with prior art, the beneficial effects of the utility model are:
Employing motor is integrated with rotation-speed measuring device, does not need extra Installation and Debugging, is transporting and is installing and using in process not fragile, and not changing the original design of motor, can with the standard configuration of Motor Production Test installation as motor; Device only has signal generator to divide, and exports as analog pulse signal, makes that structure is more simply compact, with low cost, interface is convenient, and antijamming capability strong, measure accurately; Install in motor internal rotating shaft side, highly versatile, be suitable for most motor, to electric machine structure change little, to install transformation convenient; Standard interface socket on terminal board is drawn, and facilitates other intelligent instruments or control system directly to utilize, and can realize on-line measurement, can monitor motor speed in real time, at any time.
Accompanying drawing explanation
Fig. 1 is schematic diagram when adopting permanent magnet blocks in the online rotation-speed measuring device of electric motor built-in.
Fig. 2 is schematic diagram when adopting metal gear in the online rotation-speed measuring device of electric motor built-in.
In figure: 1-fixed mechanism, 2-rotation speed measurement unit, 3-cable, 4-interface socket, 5-electric machine casing, 6-terminal box, 7-external measurement devices, 8-rotating shaft, 9-metal gear, 10-permanent magnet blocks, 11-end cap, 12-stator winding.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figure 1, the online rotation-speed measuring device of electric motor built-in is made up of the rotating shaft (7) of fixed mechanism (1), rotation speed measurement unit (2), cable (3), electric machine casing (4), connection box for motor (5), external measurement devices (6), motor, permanent magnet blocks (9).
It is inner that rotation speed measurement unit (2) is fixed to electric machine casing (4) by fixed mechanism (1), constitutes built-in measurement mechanism.Fixed mechanism (1) is mechanical structure, at the design of electric machine casing (4) inner surface or a welding holder, fixture or bolt can be adopted to be fixed by rotation speed measurement unit (2), be convenient to installation, maintenance like this.Certainly, because dissimilar internal structure of motor space is different, also can be fixed on the upper or stator winding (12) of end cap (11), total principle be exactly the change reducing as far as possible or motor is not designed.
Rotation speed measurement unit (2) is connected to through cable (3) and is fixedly mounted on the interface socket (4) at connection box for motor (6) place, like this, can loading when motor manufacturing, substantially need not change design of electrical motor, also can carry out improvement and installation easily to running motor simultaneously.Cable (3) can ventilation hole outside stator through connection box for motor (6) place, prolong journey and can adopt machinery or to be gluingly fixed.Interface socket (4) connects various external measurement devices (7), external measurement devices (7) can be the device being specifically designed to tachometric survey and output, be directly installed on electric machine casing (4) outside, measure in real time, display etc., also can be other intelligent instruments or electric machine control system, measuring rotating speed be used for the real-time control of motor.
It is pointed out that fixed mechanism (1) is arranged on electric machine casing (4) inner, cable (3) is drawn through connection box for motor (5) place, then take electric motor end cap apart when installation and repairing; If be arranged on by fixed mechanism (1) on electric motor end cap (11), dismounting and installation relate to cable (3), relatively bother and easily damage.Certainly now also can consider to punch on end cap, draw cable (3), but like this and other measurement mechanism and equipment connection or integrated time can bring difficulty.
Cable (3) can be adopted as multicore shielding line, shielding layer grounding, effectively can improve the antijamming capability of measurement mechanism.
Rotation speed measurement unit (2) adopts Hall element or induction coil, Main Basis magnetic field intensity, induced inside voltage or faradic Changing Pattern measure rotational speed pulse signal, be still analog signal in essence, when motor runs under internal magnetic field interference, than employing digital data transmission, there is stronger antijamming capability.
The method and the principle that produce and measure rotational speed pulse signal are: the rotating shaft (8) of motor is provided with one or more permanent magnet blocks (10), along with rotating shaft (8) rotates, rotation speed measurement unit (2) is just installed permanent magnet blocks (10), then in rotating shaft (8) rotary course, each permanent magnet blocks (10) obviously will have a changes of magnetic field when forwarding near rotation speed measurement unit (2), thus the change of magnetic field strength measured in causing rotation speed measurement unit (2), or induced voltage or the larger change of induced current, produce and be similar to on-off model; After external measurement devices (7) detects this change, according to the quantity of permanent magnet blocks (10), can calculate real-time rotate speed, certainly, the quantity of permanent magnet blocks (10) is more in theory, and the cycle of measurement is shorter, and precision is higher.
Permanent magnet blocks (10) is fixed in upper wheel case or the adhesive means of adopting of rotating shaft (8), can change the structure of rotating shaft (8) like this; Also can process mounting groove in rotating shaft (8), then permanent magnet blocks (10) be embedded, and concordant with rotating shaft (8) surface, install firmly, save inner space, but may the mechanical strength of countershaft (8) impact.
Permanent magnet blocks (10) adopts wheel case mode to fix in rotating shaft (8) if gone up, the diameter of this wheel case also can do larger, the fixed mechanism (1) of corresponding rotation speed measurement unit (2) will do shorter, or also by corresponding for rotation speed measurement unit (2) side permanent magnet blocks (10), tacho-pulse information can be gathered.
During practical application, online rotation-speed measuring device can also, according to motor internal space distribution situation, be selected to be arranged near front end housing or near rear end cap.
Alternatively execution mode, can adopt metal gear (9) to substitute and permanent magnet blocks (10), as shown in Figure 2, at this moment needs externally-applied magnetic field excitation.Rotation speed measurement unit (2) adopts induction coil, is the additional constant voltage of induction coil by external measurement devices (6), then induction coil produces a stable magnetic field.When the gear teeth of metal gear (9) rotate to the induction coil position of rotation speed measurement unit (2), this magnetic field of gear teeth motion cutting, thus eddy current is produced in the gear teeth, this eddy current can cause the curent change in induction coil, external measurement devices (6) measures this curent change in real time, can obtain rotational speed pulse signal.
Claims (6)
1. the online rotation-speed measuring device of electric motor built-in, is characterized in that: device comprises fixed mechanism (1), rotation speed measurement unit (2), cable (3), interface socket (4); It is inner that rotation speed measurement unit (2) is fixed to electric machine casing (5) by fixed mechanism (1); Rotation speed measurement unit (2) is connected to through cable (3) and is fixedly mounted on the interface socket (4) at connection box for motor (6) place, and interface socket (4) connects various external measurement devices (7).
2. the online rotation-speed measuring device of electric motor built-in according to claim 1, is characterized in that: cable (3) is shielding conductor.
3. the online rotation-speed measuring device of electric motor built-in according to claim 1, is characterized in that: rotation speed measurement unit (2) is Hall element or induction coil, and the tach signal detected is analog pulse signal.
4. the online rotation-speed measuring device of electric motor built-in according to claim 1, is characterized in that: in the rotating shaft (8) of motor, be provided with one or more metal gear (9), along with rotating shaft (8) rotates; Rotation speed measurement unit (2) is just installed metal gear (9).
5. the online rotation-speed measuring device of electric motor built-in according to claim 1, is characterized in that: in the rotating shaft (8) of motor, be provided with one or more permanent magnet blocks (10), along with rotating shaft (8) rotates; Rotation speed measurement unit (2) is just installed permanent magnet blocks (10).
6. the online rotation-speed measuring device of electric motor built-in according to claim 5, is characterized in that: permanent magnet blocks (10) is concordant with rotating shaft (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420524277.XU CN204046362U (en) | 2014-09-14 | 2014-09-14 | The online rotation-speed measuring device of electric motor built-in |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420524277.XU CN204046362U (en) | 2014-09-14 | 2014-09-14 | The online rotation-speed measuring device of electric motor built-in |
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| Publication Number | Publication Date |
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| CN204046362U true CN204046362U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420524277.XU Expired - Fee Related CN204046362U (en) | 2014-09-14 | 2014-09-14 | The online rotation-speed measuring device of electric motor built-in |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201828A (en) * | 2014-09-14 | 2014-12-10 | 哈尔滨理工大学 | Intra-motor online speed measurement device and structure thereof |
| CN104767337A (en) * | 2015-04-24 | 2015-07-08 | 永济新时速电机电器有限责任公司 | Permanent-magnet synchronous traction motor for motor train |
| CN107317436A (en) * | 2016-04-27 | 2017-11-03 | 蒂森克虏伯电梯（上海）有限公司 | A kind of permanent magnetic synchronous traction machine |
-
2014
- 2014-09-14 CN CN201420524277.XU patent/CN204046362U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201828A (en) * | 2014-09-14 | 2014-12-10 | 哈尔滨理工大学 | Intra-motor online speed measurement device and structure thereof |
| CN104767337A (en) * | 2015-04-24 | 2015-07-08 | 永济新时速电机电器有限责任公司 | Permanent-magnet synchronous traction motor for motor train |
| CN104767337B (en) * | 2015-04-24 | 2017-08-25 | 永济新时速电机电器有限责任公司 | Motor-car permanent magnet synchronous traction motor |
| CN107317436A (en) * | 2016-04-27 | 2017-11-03 | 蒂森克虏伯电梯（上海）有限公司 | A kind of permanent magnetic synchronous traction machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141224 Termination date: 20170914 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |