CN203929801U

CN203929801U - Axle sleeve type permanent magnetism rotating angular acceleration sensor

Info

Publication number: CN203929801U
Application number: CN201420309940.4U
Authority: CN
Inventors: 冯浩; 赵浩; 丁立军
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2014-06-11
Filing date: 2014-06-11
Publication date: 2014-11-05
Anticipated expiration: 2024-06-11

Abstract

The utility model discloses a kind of axle sleeve type permanent magnetism rotating angular acceleration sensor, comprise output winding, stator core, permanent magnet excitation magnet steel, nonferromagnetic material metal sleeve, rotor winding, rotor core, axle sleeve, front end end cover, front bearing, support, rear bearing and rear end cap; Stator core is fixed in nonferromagnetic material metal sleeve, nonferromagnetic material metal sleeve is fixed in support, permanent magnet excitation magnet steel is embedded in stator core, output winding is embedded in the slot for winding of stator core, axle sleeve outside is fixed in rotor core with one heart, rotor winding is fixed on rotor core outside with one heart, rotor winding outside is fixed in stator core with one heart, rotor integral winding, axle sleeve is fixed in front bearing, rear bearing, and front bearing, rear bearing are fixedly connected with support by front end end cover, rear end cap respectively; The utlity model has higher sensitivity; Another adopt axle sleeve type structure, just can use as long as be enclosed within the rotating shaft outside of rotary system when use, so convenient, installation simply.

Description

Axle sleeve type permanent magnetism rotating angular acceleration sensor

Technical field

The utility model relates to a kind of sensor, is specifically related to a kind of axle sleeve type permanent magnetism rotating angular acceleration sensor.

Background technology

Rotation (angle) acceleration analysis is one of the most common measurement in mechanical value measuring, known magneto rotation (angle) acceleration adopts cup-shaped rotor structure, and inner stator adopts overall permanent magnetic steel, 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, the sensitivity of sensor is very low, and, sensor adopts connector that sensor is coaxially connected with tested rotary system while use.

Summary of the invention

The utility model is for the deficiencies in the prior art, proposed a kind of axle sleeve type permanent magnetism rotating angular acceleration sensor, it compared with prior art has 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,, when use, sensor is directly enclosed within the rotating shaft of rotary system meanwhile, be more convenient for using, and, without cup-shaped rotor, make processing simpler.

A kind of axle sleeve type permanent magnetism rotating angular acceleration sensor, comprises output winding, stator core, permanent magnet excitation magnet steel, nonferromagnetic material metal sleeve, rotor core, rotor winding, axle sleeve, front end end cover, front bearing, support, rear bearing and rear end cap; Described stator core is fixed in nonferromagnetic material sleeve, nonferromagnetic material sleeve is fixed in support, permanent magnet excitation magnet steel is embedded in stator core, output winding is embedded in the slot for winding of stator core, axle sleeve outside is fixed in rotor core with one heart, rotor winding is fixed on rotor core outside with one heart, rotor winding outside is fixed in stator core with one heart, rotor winding adopts thickness circular tubular entirety winding, axle sleeve is fixed in front bearing, rear bearing, and front bearing, rear bearing are fixedly connected with support by front end end cover, rear end cap respectively;

The axis of described output winding and the magnetic field axis of permanent magnetic steel are mutually orthogonal, and the magnetic resistance of the output axis magnetic circuit of winding and the magnetic field axis magnetic circuit of permanent magnetic steel is different.

Described axle sleeve, front end end cover, support, rear end cap adopt ferromagnetic material to make, and stator core adopts siliconized plate, and described rotor winding adopts copper or aluminium.

Described output winding adopts copper magnet wire.

Beneficial effect: in the utility model, due to d-axis, the quadrature-axis reluctance difference of sensor iron circuit, so compared with situation about all being formed by permanent magnetic steel with magnetic circuit material, there is higher sensitivity; Another adopt axle sleeve type structure, just can use as long as be enclosed within the rotating shaft outside of rotary system when use, so convenient, installation simply; Rotor does not adopt cup-shaped rotor, makes processing simpler, and cost declines; Rotor winding adopts thickness circular tubular entirety winding instead of adopts common cage-type rotor winding, makes to export in winding, to produce induced electricity potential energy and overcome the noise that cage-type rotor winding brings.

Brief description of the drawings

Fig. 1 is the utility model one-piece construction schematic diagram;

Fig. 2 is the sectional view along rotor shaft direction in support;

Fig. 3 is Fig. 2 A-A cut-open view.

Embodiment

As shown in Figure 1, Figure 2, Figure 3 shows, a kind of axle sleeve type permanent magnetism rotating angular acceleration sensor, comprises output winding 1, stator core 2, rotor winding 3, permanent magnet excitation magnet steel 4, rotor core 5, axle sleeve 6, front end end cover 7, front bearing 8, support 9, rear bearing 10 and rear end cap 11, nonferromagnetic material sleeve 12, described stator core 2 is fixed on nonferromagnetic material metal sleeve 12, nonferromagnetic material metal sleeve 12 is fixed in support 9, permanent magnet excitation magnet steel 4 is embedded in stator core 2, output winding 1 is embedded in the slot for winding of stator core, axle sleeve 6 outsides are fixed in rotor core 5 with one heart, rotor winding 3 is fixed on rotor core outside with one heart, rotor winding outside is fixed in stator core with one heart, rotor winding adopts thickness circular tubular entirety winding, axle sleeve is fixed on front bearing 8, in rear bearing 10, front bearing, rear bearing is respectively by front end end cover 7, rear end cap 11 is fixedly connected with support 9,

The axis of described output winding and the magnetic field axis of permanent magnet excitation magnet steel are mutually orthogonal, and the magnetic resistance of the output axis magnetic circuit of winding and the magnetic field axis magnetic circuit of permanent magnetic steel is different.

When concrete use, sensor sleeve, outside the rotating shaft of rotary system, support and rotary system end cap are fixed, and the axle rotor driven of rotary system rotates together.Make permanent rotary speed movement as the transmission shaft of system under test (SUT), rotor is also made permanent rotary speed movement, in rotor winding, produces electromotive force, and 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, rotor is also made non-permanent rotary speed movement, because excitation field is constant, the electromotive force size producing in 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 rotor, produce time dependent current component, this rotor current component 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 direct axis reluctance is little more than quadrature-axis reluctance, so, the induction electromotive force situation identical with quadrature axis d-axis magnetic circuit reluctance and that be all made up of permanent magnetic steel producing in output winding is compared, corresponding to same output umber of turn, same magnetic field intensity, same rotating angular acceleration, this sensor can be exported larger output electromotive force, i.e. sensitivity improves.

Claims

1. Shaft sleeve type permanent magnet rotational angular acceleration sensor, including output winding, stator core, permanent magnet excitation magnetic steel, metal sleeve of non-ferromagnetic material, rotor core, rotor winding, shaft sleeve, front end cover, front bearing, frame , rear bearing and rear end cover; it is characterized in that: the stator core is fixed in the metal sleeve of non-ferromagnetic material, the metal sleeve of non-ferromagnetic material is fixed in the frame, and the permanent magnet excitation magnetic steel is embedded in the stator iron In the core, the output winding is embedded in the winding slot of the stator core, the rotor core is concentrically fixed on the outside of the sleeve, the rotor winding is concentrically fixed on the outside of the rotor core, the stator core is concentrically fixed on the outside of the rotor winding, and the rotor winding adopts a cylindrical overall winding of equal thickness , the shaft sleeve is fixed in the front bearing and the rear bearing, and the front bearing and the rear bearing are fixedly connected to the machine base through the front end cover and the rear end cover respectively;

The axis of the output winding is perpendicular to the magnetic field axis of the permanent magnet excitation magnet steel, and the magnetic resistance of the axial magnetic circuit of the output winding is different from that of the magnetic field axis magnetic circuit of the permanent magnet magnetic steel.

2. The shaft sleeve type permanent magnet rotational angular acceleration sensor according to claim 1, characterized in that: the shaft sleeve, front end cover, machine base, and rear end cover are made of ferromagnetic materials.

3. The sleeve type permanent magnet rotational angular acceleration sensor according to claim 1, characterized in that: the stator core is made of silicon steel sheet.

4. The sleeve type permanent magnet rotational angular acceleration sensor according to claim 1, characterized in that: the rotor winding is made of copper or aluminum.

5. The sleeve type permanent magnet rotational angular acceleration sensor according to claim 1, characterized in that: said output winding adopts copper magnet wire.