CN104034916A - Permanent magnet rotation angle acceleration sensor with unequal magnetic resistance of direct axis and quadrature axis - Google Patents
Permanent magnet rotation angle acceleration sensor with unequal magnetic resistance of direct axis and quadrature axis Download PDFInfo
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- CN104034916A CN104034916A CN201410259099.7A CN201410259099A CN104034916A CN 104034916 A CN104034916 A CN 104034916A CN 201410259099 A CN201410259099 A CN 201410259099A CN 104034916 A CN104034916 A CN 104034916A
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Abstract
The invention discloses a permanent magnet rotation angle acceleration sensor with unequal magnetic resistance of a direct axis and a quadrature axis. The permanent magnet rotation angle acceleration sensor with unequal magnetic resistance of the direct axis and the quadrature axis comprises a shell, wherein a horizontal rotating shaft is arranged at the center of the shell, and is characterized in that an outer stator iron core is mounted and fixed in the shell, an output winding is arranged in an iron core winding groove of an outer stator, permanent magnet magnetic steel is embedded in an inner stator iron core, a cup-shaped rotor is fixed and mounted in an air gap between the outer stator iron core and the inner stator iron core, the cup-shaped rotor is fixedly connected with the rotating shaft through a movable sleeve, the rotating shaft is mounted on the shell through two bearings, and the axial line of the iron core winding of the outer stator and the magnetic axis of the permanent magnet magnetic steel embedded in the inner stator iron core are mutually orthogonal. Compared with a whole inner stator structure which completely adopts the permanent magnet magnetic steel, the permanent magnet rotation angle acceleration sensor with unequal magnetic resistance of the direct axis and the quadrature axis is higher in sensitivity, high in precision as an output electrodynamic potential and a rotation accelerated speed are in one-to-one correspondence, and is simple in structure; as the sensor and a transmission system are connected coaxially, a rotation acceleration signal is obtained directly.
Description
Technical field
The present invention relates to a kind of sensor, be specifically related to a kind of d-axis and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc.
Background technology
Rotation (angle) acceleration analysis is one of the most common measurement in mechanical value measuring, the whole permanent magnetic steel that adopts of known its inner stator of magneto rotation (angle) acceleration, because permanent magnetic steel magnetic resistance is very large, quadrature axis direct axis reluctance equates, and the induced potential size being produced in cup-shaped rotor by rotating angular acceleration is limited, so, the electric current that this electromotive force produces and the magnetic flux that produces can be very little, thereby the induced potential producing in output winding can be very little, and the sensitivity of sensor is very low.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of d-axis and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc. is provided, there is higher sensitivity, the in the situation that of same rotating angular acceleration when output umber of turn is when constant, in output winding, can export larger induced potential.
A kind of d-axis and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., comprise housing, base, the center of described housing is provided with a horizontal rotating shaft, housing is fixed on base, external stator iron core is fixed in housing, in the slot for winding unshakable in one's determination of external stator, be provided with output winding, internal stator iron core is embedded in permanent magnetic steel, cup-shaped rotor is fixed and is arranged between the air gap of external stator iron core and internal stator iron core, cup-shaped rotor is fixedly connected with rotating shaft by movable sleeve, rotating shaft is arranged on housing by two bearings, the axis (d-axis) of the output winding of external stator is mutually orthogonal with the magnetic axis (quadrature axis) that internal stator iron core is embedded in permanent magnetic steel.
Another the second form: it is unshakable in one's determination that described permanent magnetic steel embeds external stator, output winding is arranged in external stator iron core, and the axis (d-axis) of the output winding of external stator is mutually orthogonal with the magnetic axis (quadrature axis) of permanent magnetic steel that embeds external stator iron core.Stator core is provided with nonferromagnetic material fixed cover outward, and this cover and base are fixed.
Another the third form: it is unshakable in one's determination that described permanent magnetic steel embeds external stator, output winding is arranged in internal stator iron core, and the axis (d-axis) of the output winding of internal stator iron core is mutually orthogonal with the magnetic axis (quadrature axis) of permanent magnetic steel that embeds external stator iron core.Stator core is provided with nonferromagnetic material fixed cover outward, and this cover and base are fixed.
Described rotating shaft adopts stainless steel material to make, and described housing adopts ferromagnetic material to make, and stator core adopts siliconized plate, and described output winding adopts copper magnet wire, and described cup-shaped rotor winding adopts little copper or the aluminium of resistivity.
Beneficial effect: because d-axis, the quadrature-axis reluctance of sensor are different, so compare with the inner stator structure of whole full employing permanent magnetic steel, there is higher sensitivity, and output electromotive force is corresponding one by one with rotation (angle) acceleration, precision is high, and, simple in structure; Because sensor and kinematic train are coaxially connected, rotation (angle) acceleration signal obtains directly, therefore, easy to use.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of embodiment 1;
Fig. 3 is the structural representation of embodiment 2;
Fig. 4 is the structural representation of embodiment 3.
Embodiment
Embodiment 1, as Fig. 1, shown in Fig. 2, a kind of d-axis and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., comprise housing 2, the center of described housing is provided with a horizontal rotating shaft 1, external stator iron core 3 is fixed in housing 2, in the slot for winding unshakable in one's determination of external stator, be provided with output winding 6, internal stator iron core 4 is embedded in permanent magnetic steel 7, cup-shaped rotor 5 is fixed and is arranged between the air gap of external stator iron core and internal stator iron core, cup-shaped rotor is fixedly connected with rotating shaft by movable sleeve, rotating shaft is arranged on housing by two bearings, the axis (d-axis) of the output winding in external stator is mutually orthogonal with the magnetic axis (quadrature axis) that internal stator iron core is embedded in permanent magnetic steel.
Embodiment 2, as Fig. 1, shown in Fig. 3, a kind of d-axis and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., comprise housing 2, the center of described housing is provided with a horizontal rotating shaft 1, the outer nonferromagnetic material fixed cover 8 that is provided with of external stator unshakable in one's determination 3, this cover is fixed in housing 2, described permanent magnetic steel 7 embeds external stator iron core 3, output winding 6 is arranged in external stator iron core 3, the axis (d-axis) of the output winding in external stator is mutually orthogonal with the magnetic axis (quadrature axis) of the permanent magnetic steel of embedding external stator iron core, cup-shaped rotor is fixed and is arranged between the air gap of external stator iron core and internal stator iron core 4, cup-shaped rotor 5 is fixedly connected with rotating shaft 1 by movable sleeve, rotating shaft 1 is arranged on housing 2 by two bearings.
Embodiment 3, as Figure 1 and Figure 4, a kind of d-axis and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., the center that comprises housing 2, described housing is provided with a horizontal rotating shaft 1, the outer nonferromagnetic material fixed cover 8 that is provided with of external stator unshakable in one's determination 3, this cover is fixed in housing 2, described permanent magnetic steel 7 embeds external stator iron core 3, output winding 6 is arranged in internal stator iron core 4, and the axis (d-axis) of the output winding in internal stator iron core is mutually orthogonal with the magnetic axis (quadrature axis) of the permanent magnetic steel of embedding external stator iron core.Cup-shaped rotor is fixed and is arranged between the air gap of external stator iron core and internal stator iron core, and cup-shaped rotor 5 is fixedly connected with rotating shaft 1 by movable sleeve, and rotating shaft 1 is arranged on housing 2 by two bearings.
Its principle of work is as follows: take example one as example, permanent magnet excitation magnet steel is embedded in internal stator iron core, output winding is embedded in external stator iron core, and the output winding axis of winding and the magnetic direction of permanent magnetic steel are mutually orthogonal, between two stator cores, formed air-gap field, the air gap that cup-shaped rotor winding is positioned between inside and outside stator core is concentric with stator, and cup-shaped rotor connects and can rotate with respect to stator with sensor rotating shaft.If the axis of output winding is d-axis, permanent magnetic steel axis is quadrature axis, when the magnetic line of force passes through inner stator, straight axial magnetic resistance is mainly determined by the magnetic resistance of the ferromagnetic material of internal stator iron core, hand over the main permanent magnetic steel magnetic resistance in inner stator of axial magnetic resistance to determine, so the magnetic resistance of d-axis is much smaller than the magnetic resistance of quadrature axis.During work, sensor rotating shaft coaxially connects with the transmission shaft of system under test (SUT).As the transmission shaft of system under test (SUT), make permanent rotary speed movement, cup-shaped rotor is also made permanent rotary speed movement, in cup-shaped rotor winding, produces electromotive force, this electromotive force produces rotor current, and rotor current produces magnetic field, now, this magnetic field magnetic potential constant amplitude, stator output winding electromotive force is zero, as the transmission shaft of system under test (SUT) is made non-permanent rotary speed movement, there is rotation (angle) acceleration, cup-shaped rotor is also made non-permanent rotary speed movement, due to, excitation field is constant, the electromotive force size producing in cup-shaped rotor winding is corresponding with the rotating speed of the non-permanent rotary speed movement of system, this electromotive force produces rotor current, thereby in cup-shaped rotor, produce time dependent electric current, this rotor current produces also temporal evolution of magnetic field magnetic potential amplitude, this time dependent magnetic field of magnetic potential amplitude and stator output winding interlinkage, thereby produce output potential in stator output winding, this output potential is corresponding with the rotation speed change of system.And, because quadrature-axis reluctance is large more than direct axis reluctance, so, the induction electromotive force producing in output winding is compared with the situation that whole inner stator all consists of permanent magnetic steel, corresponding to same output umber of turn, same magnetic field intensity, same rotating angular acceleration, d-axis, the different structure of quadrature-axis reluctance can be exported larger output electromotive force, i.e. sensitivity improves.
Claims (8)
1. a d-axis and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., its basic model: comprise housing, the center of described housing is provided with a horizontal rotating shaft, it is characterized in that: external stator iron core is fixed in housing, in the slot for winding unshakable in one's determination of external stator, be provided with output winding, internal stator iron core is embedded in permanent magnetic steel, cup-shaped rotor is arranged between the air gap of external stator iron core and internal stator iron core, cup-shaped rotor is fixedly connected with rotating shaft by movable sleeve, rotating shaft is arranged on housing by two bearings, the magnetic axis that the axis of the output winding of external stator and internal stator iron core are embedded in permanent magnetic steel is mutually orthogonal.
2. a kind of d-axis according to claim 1 and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., it is characterized in that: it is unshakable in one's determination that described permanent magnetic steel embeds external stator, output winding is arranged in external stator iron core, external stator iron core is provided with nonferromagnetic material fixed cover outward, this cover is fixed in housing, and the axis of the output winding of external stator is mutually orthogonal with the magnetic axis of the permanent magnetic steel of embedding external stator iron core.
3. a kind of d-axis according to claim 1 and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., it is characterized in that: it is unshakable in one's determination that described permanent magnetic steel embeds external stator, output winding is arranged in internal stator iron core, external stator iron core is provided with nonferromagnetic material fixed cover outward, this cover is fixed in housing, and the axis of the output winding of internal stator iron core is mutually orthogonal with the magnetic axis of the permanent magnetic steel of embedding external stator iron core.
4. a kind of d-axis according to claim 1 and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., is characterized in that: described rotating shaft adopts stainless steel material to make.
5. a kind of d-axis according to claim 1 and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., is characterized in that: described housing adopts ferromagnetic material to make.
6. a kind of d-axis according to claim 1 and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., is characterized in that: stator core adopts siliconized plate.
7. a kind of d-axis according to claim 1 and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., is characterized in that: described output winding adopts copper magnet wire.
8. a kind of d-axis according to claim 1 and quadrature-axis reluctance permanent magnetism rotating angular acceleration sensor not etc., is characterized in that: described cup-shaped rotor winding adopts little copper or the aluminium of resistivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259099.7A CN104034916B (en) | 2014-06-11 | 2014-06-11 | The permanent magnetism rotating angular acceleration sensor that a kind of d-axis and quadrature-axis reluctance do not wait |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259099.7A CN104034916B (en) | 2014-06-11 | 2014-06-11 | The permanent magnetism rotating angular acceleration sensor that a kind of d-axis and quadrature-axis reluctance do not wait |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104034916A true CN104034916A (en) | 2014-09-10 |
| CN104034916B CN104034916B (en) | 2017-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410259099.7A Expired - Fee Related CN104034916B (en) | 2014-06-11 | 2014-06-11 | The permanent magnetism rotating angular acceleration sensor that a kind of d-axis and quadrature-axis reluctance do not wait |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61167869A (en) * | 1985-01-18 | 1986-07-29 | Diesel Kiki Co Ltd | Acceleration sensor |
| US20010037684A1 (en) * | 1999-09-24 | 2001-11-08 | Cda Astro Intercorp | Permanent magnet rotary accelerometer |
| CN101299048A (en) * | 2008-07-04 | 2008-11-05 | 嘉兴学院 | Rotating angular acceleration sensor |
| CN201237606Y (en) * | 2008-07-04 | 2009-05-13 | 嘉兴学院 | Permanent magnet type rotating angular acceleration sensor |
-
2014
- 2014-06-11 CN CN201410259099.7A patent/CN104034916B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61167869A (en) * | 1985-01-18 | 1986-07-29 | Diesel Kiki Co Ltd | Acceleration sensor |
| US20010037684A1 (en) * | 1999-09-24 | 2001-11-08 | Cda Astro Intercorp | Permanent magnet rotary accelerometer |
| CN101299048A (en) * | 2008-07-04 | 2008-11-05 | 嘉兴学院 | Rotating angular acceleration sensor |
| CN201237606Y (en) * | 2008-07-04 | 2009-05-13 | 嘉兴学院 | Permanent magnet type rotating angular acceleration sensor |
Non-Patent Citations (2)
| Title |
|---|
| 罗玲 等: "空心杯电机电磁阻力矩特性的实验研究", 《微特电机》 * |
| 赵浩 等: "基于电磁感应原理的永磁旋转角加速度传感器研究", 《传感技术学报》, vol. 25, no. 9, 30 September 2012 (2012-09-30), pages 1257 - 1261 * |
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| CN104034916B (en) | 2017-11-28 |
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