JPH02234019A - Fixing device for resolver - Google Patents

Abstract

PURPOSE:To keep a gap between a stator and rotor of resolver constant by connecting the resolver stator to a fixing part located above the resolver through a joint mechanism and an extension/contraction mechanism. CONSTITUTION:A downside joint 11 is provided at the upper end of resolver stator 2 and a upside joint 13 is provided at the fixing part 12 located above the resolver 1, and both joints 11, 13 are connected through the extension/ contraction mechanism 14. When a driving shaft 10 is made to revolve by start ing a rotary electric device, a run-out of the shaft 10 occurs and this shaft run-out is transferred to upper/lower ball bearings 9 through the rotor 3 which is directly connected to the shaft 10, then transferred to the stator 2. Here, since the state 2 is constituted by suspending the resolver 1 from the fixing part 12 by jointer 11, 13 and mechanism 14, it can move in the horizontal and vertical directions following up to the shaft run-out of the rotor 3. With this arrangement, the gap between the stator 2 and the rotor 3 is always kept con stant, thereby a position of the rotor for rotary electric device can be detected with high accuracy.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a fixing device for a resolver that detects the rotation of a rotating electrical machine such as a generator or an electric motor, and particularly relates to a fixing device for a resolver that detects the rotation of a rotating electric machine such as a generator or an electric motor. Regarding the fixing device that does not provide the resolver with

(Prior Art) FIG. 6 shows a conventional resolver fixing device. In the figure, reference numeral 1 indicates a resolver consisting of a resolver stator 2 and a resolver rotor 3, and the resolver stator 2 has knock bolts 4. The resolver mount 5 is fixed onto a stationary part 8 via a bolt 6 and a spring washer 7.

Further, as shown in FIG. 6, the resolver rotor 3 is rotatably supported by the resolver mount 5 via a ball bearing 9, and is directly connected to the drive shaft 10 of the rotating electric machine at a lower position. There is.

(Problems to be Solved by the Invention) In the conventional resolver fixing device, the resolver stator 2 is fixed to the stationary part 8, and the resolver loader 3
Since the resolver 1 is directly connected to the drive shaft 10, there is a problem that the resolver 1 is affected by the rotating electric machine.

That is, when the rotating electrical machine rotates, the drive shaft 10 thereof oscillates, and the resolver rotor 3 directly connected thereto also oscillates. As a result, there is a problem in that the gap G between the resolver stator 2 and the resolver rotor 3 changes, and the rotation detection accuracy is significantly disturbed, causing problems in controlling the rotating electric machine.

The present invention was made in view of the current situation, and provides a resolver fixing device that can maintain a constant gap between a resolver stator and a resolver rotor and detect the rotational position of a rotating electric machine with high precision. The purpose is to

[Structure of the invention]

(Means for Solving the Problems) A first aspect of the present invention provides a joint mechanism that allows the resolver stator of the resolver to move in the horizontal direction, and a joint mechanism that allows the resolver stator to move in the vertical direction of the resolver stator. It is characterized in that it is connected to a fixed part above the resolver via an expansion and contraction mechanism that allows movement of the resolver.

Furthermore, a second aspect of the present invention is characterized in that the drive shaft of the rotating electric machine and the resolver rotor are connected via a universal joint.

Furthermore, the third aspect of the present invention is that between the resolver stator of the resolver and the stationary part that supports the resolver stator,
It is characterized by interposing an elastic material.

(Function) In the resolver fixing device according to the first aspect of the present invention, the resolver stator is connected to the fixing part above the resolver, and a joint mechanism and a telescoping mechanism are interposed therebetween. . Further, horizontal movement and vertical movement of the resolver stator is allowed. Therefore, the longitudinal and lateral movements and vertical movements caused by the axial vibration of the resolver stator are absorbed, and the gap between the resolver stator and the resolver rotor is kept constant.

Furthermore, in the resolver fixing device according to the second aspect of the present invention, the universal joint that connects the drive shaft of the rotating electric machine and the resolver rotor absorbs misalignment between the two, and The gap remains constant.

Furthermore, in the resolver fixing device according to the third aspect of the present invention, the elastic material interposed between the resolver stator and the stationary part allows the resolver stator to tilt following the vibration of the drive shaft of the rotating electric machine. This keeps the gap between the resolver stator and the resolver rotor constant.

(Example) Hereinafter, a first example of the present invention will be described with reference to FIGS. 1 and 2.

In FIGS. 1 and 2, reference numeral 1 denotes a resolver consisting of a resolver stator 2 and a resolver rotor 3, and the resolver rotor 3 is rotatably arranged within the resolver stator 2 via a ball bearing 9. , its lower end is directly connected to a drive shaft 10 of a rotating electric machine (not shown) through a hole 8a of the stationary part 8.

On the other hand, as shown in FIGS. 1 and 2, a lower joint 11 is provided at the upper end of the resolver stator 2 to allow movement of the resolver stator 2 in the left-right direction in FIG. An upper joint 13 is provided on the fixed part 12 above the resolver 1 to allow the resolver stator 2 to move in the left-right direction in FIG. These joints 11, 13 are connected via a telescoping mechanism 14 that allows only vertical movement of the resolver stator 2, thereby allowing horizontal movement and vertical movement of the resolver stator 2. The gap G between the resolver stator 2 and resolver rotor 3 is maintained constant.

Next, the operation of this embodiment will be explained.

When the rotating electric machine is started and the drive shaft 10 rotates, the drive shaft 10 will run out, but this shaft runout is transferred to the upper and lower ball bearings 9 via the resolver rotor 3 that is directly connected to the drive shaft 10. and further transmitted to the resolver stator 2.

Here, when the resolver stator 2 is fixed to the stationary part 8, the movement of the resolver stator 2 is restricted, and the gap G between the resolver stator 2 and the resolver rotor 3 becomes a capsule, and the rotor of the rotating electrical machine becomes However, in this embodiment, the resolver stator 2 is suspended from the fixed part 12 above the resolver 1 via the upper and lower joints 11.13 and the telescopic mechanism 14. Therefore, the resolver stator 2 follows the axial runout of the resolver rotor 3 and moves in the horizontal direction and the vertical direction. As a result, the gap C between the resolver stator 2 and the resolver rotor 3 is always kept constant, and the position of the rotor of the rotating electric machine can be detected with high precision.

FIG. 3 shows a second embodiment of the present invention, in which the resolver rotor 3 and the drive shaft 10 are not directly connected, but are connected via a universal joint 15.

That is, the resolver 1 consisting of a resolver stator 2 and a resolver rotor 3 is fixed on a resolver mounting base 5 via knock bolts 4 as shown in FIG. It is fixed onto a stationary part 8 via a spring washer 7. The resolver rotor 3 is rotatably supported by a resolver mounting base 5 via a ball bearing 9, and its lower end is connected to a drive shaft 10 of a rotating electrical machine via a universal joint 15 such as a bellows joint. ing.

In addition, in FIG. 3, the reference numeral 16 is a signal output lead wire.

Next, the operation of this embodiment will be explained.

When the rotating electric machine is started to rotate the drive shaft 10, the rotational force is transmitted to the resolver rotor 3 via the universal joint 15, and the resolver rotor 3 is rotationally driven.
The axial vibration of 0 is absorbed by the universal joint 15, and the resolver rotor 3 does not axially vibrate. Therefore, the gap G between the resolver stator 2 and the resolver rotor 3 is always kept constant.

4 and 5 show a third embodiment of the present invention, in which an elastic material 17 such as a rubber plate is interposed between the resolver mounting base 5 and the stationary part 8. be.

In other words, the resolver 1 consisting of a resolver stator 2 and a resolver rotor 3 is fixed on a resolver mounting base 5 via knock bolts 4, as shown in FIGS. 4 and 5. The rotor 2 is rotatably supported by the resolver mount 5 via a ball bearing 9, and its lower end is directly connected to a drive shaft 10 of the rotating electric machine.

As shown in FIGS. 4 and 5, the resolver mounting base 5 is placed on the stationary part 8 via an elastic material 17 such as a rubber plate, and fixed to the stationary part 8 by bolts 6 and spring washers 7. has been done.

Next, the operation of this embodiment will be explained.

When the drive shaft 10 oscillates due to rotation due to the start-up of the rotating electrical machine, the movement is transmitted to the resolver rotor 3 directly connected to the drive shaft 10 and also to the resolver mount 5 via the ball bearing 9. and is transmitted to the resolver stator 2.

Here, when the resolver mounting base 5 is completely fixed on the stationary part 8, the movement of the resolver mounting base 5 and the resolver stator 2 is restricted, and the gap G between the resolver stator 2 and the resolver rotor 3 is However, in the case of this embodiment, the resolver mounting base 5 and the stationary part 8
Since the elastic material 17 is interposed between the drive shaft 10 and
When the shaft oscillates, the resolver mounting base 5 follows this and tilts as shown in FIG. Therefore, the gap G between the resolver stator 2 and the resolver rotor 3 is
is always held constant.

In the third embodiment, the elastic material 17 is interposed between the resolver mounting base 5 and the stationary part 8. However, the resolver rotor 3 is directly attached to the resolver stator 2 via the ball bearing 9. (see FIGS. 1 and 2), the resolver mounting base 5 is omitted, so in this case, an elastic material 17 is interposed between the resolver stator 2 and the stationary part 8. It turns out.

〔Effect of the invention〕

As explained above, in the first aspect of the present invention, the resolver stator is connected to the fixed part above the resolver via the joint mechanism and the expansion/contraction mechanism, so that the resolver stator follows the axial runout of the drive shaft. The stator moves, which causes
The gap between the resolver stator and resolver rotor can be kept constant.

Furthermore, in the second aspect of the present invention, since the drive shaft and the resolver rotor are connected through the universal joint, even if the drive shaft oscillates, the resolver rotor does not oscillate. The gap between the resolver stator and resolver rotor can be kept constant.

Furthermore, in the third aspect of the present invention, since an elastic material is interposed between the resolver stator and the stationary part that supports the resolver stator, the resolver stator moves following the axial runout of the drive shaft. , Thereby, the gap between the resolver stator and the resolver rotor can be kept constant.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a resolver fixing device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along the line
The figure is a partial sectional view of a fixing device for a resolver showing a second embodiment of the present invention, FIG. 4 is a view corresponding to FIG. 3 showing a third embodiment of the present invention, and FIG. The explanatory diagram shown in FIG. 6 is a partial sectional view showing a conventional resolver fixing device. 1... Resolver, 2... Resolver stator, 3...
・Resolver rotor, 5... Resolver mounting base, 8...
Stationary part, 9... Ball bearing, 10... Drive shaft, 11... Lower joint, 12... Fixed part, 13...
Upper joint, 14... Telescopic mechanism, 15... Universal joint,
17...Elastic material, G...Gap.

Claims (1)

[Claims] 1. In a resolver that connects a resolver rotor to the upper part of a drive shaft of a rotating electrical machine to detect rotation of the rotating electrical machine, a resolver stator of the resolver is configured to allow horizontal movement of the resolver stator. A fixing device for a resolver, characterized in that it is connected to a fixing part above the resolver via a joint mechanism and a telescoping mechanism that allows vertical movement of the resolver stator. 2. A resolver that connects a resolver rotor to the upper part of a drive shaft of a rotating electrical machine to detect the rotation of the rotating electrical machine, characterized in that the drive shaft of the rotating electrical machine and the resolver rotor are coupled via a universal joint. Resolver fixing device. 3. In a resolver that connects a resolver rotor to the upper part of a drive shaft of a rotating electrical machine to detect the rotation of the rotating electrical machine, an elastic material is interposed between the resolver stator of the resolver and a stationary part that supports the resolver stator. A resolver fixing device characterized by: