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Rotation angle detecting device and dynamo-electric machine

A technology of rotation angle detection and rotation angle, which is applied in the direction of measuring devices, electromechanical devices, and electric/magnetic devices to transmit sensing components, etc., can solve the problems of rotation angle detection, lack of redundancy, etc., and achieve the goal of reducing the number of terminals Effect

Active Publication Date: 2018-08-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, although it is possible to detect abnormalities such as open circuit and short circuit of the output winding, there is a problem that the rotation angle cannot be detected in the same way as normal when an abnormality occurs due to lack of redundancy.

Method used

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  • Rotation angle detecting device and dynamo-electric machine
  • Rotation angle detecting device and dynamo-electric machine
  • Rotation angle detecting device and dynamo-electric machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0047] figure 2 It is a block diagram showing the rotation angle detection device according to Embodiment 1 of the present invention. exist figure 2 Among them, the resolver 20 has a first output winding 21 , a second output winding 22 , a third output winding 23 , a first field winding 24 , and a second field winding 25 , which are coils 50 wound around the teeth of the stator 40 .

[0048] The first output winding 21 , the second output winding 22 , and the third output winding 23 are connected to the angle calculator 10 via positive terminals Sa+, Sb+, Sc+ and negative terminals Sa−, Sb−, Sc−, respectively. The angle calculator 10 calculates and outputs the rotation angle of the rotor 30 from the output voltages generated in the three-phase output windings of the resolver 20 .

[0049] The first field winding 24 and the second field winding 25 are connected to the first field circuit 81 and the second field circuit 82 via positive terminals Ra+, Rb+ and negative termi...

Embodiment approach 2

[0119] Figure 11 It is an explanatory diagram showing the relationship between the number of turns of the first and second field windings and the number of teeth in the resolver of the rotation angle detection device according to Embodiment 2 of the present invention. exist Figure 11 In , the winding distribution of the field winding is shown. Furthermore, the number of turns of the field winding is normalized by the amplitude of the turns.

[0120] In addition, the resolver according to Embodiment 2 of the present invention has the same image 3 The shown resolver 20 has the same structure, and the number N of teeth 41 of the stator 40 s is 12, the number N of the salient poles 31 of the rotor 30 x for 5. In addition, in Embodiment 2 of the present invention, the number N of teeth 41 s Set to 12, the number of salient poles 31 N x Although it is assumed that 5 is used for description, it is not limited to the above-mentioned number, and the same effect can be obtaine...

Embodiment approach 3

[0129] Figure 13 It is a sectional view showing the resolver of the rotation angle detection device according to Embodiment 3 of the present invention. exist Figure 13 Among them, the two-phase field windings 24 and 25 and the three-phase output windings 21 to 23 are respectively wound around the teeth T1 to T12 of the stator 40 .

[0130] In addition, in Figure 13 The illustrated resolver 20 has a configuration in which two-phase field windings 24 and 25 are wound on the inner diameter side of the tooth portion 41 and three-phase output windings 21 to 23 are wound on the outer diameter side. At this time, any one of the first field winding 24 and the second field winding 25 may be wound first, and the first output winding 21 , the second output winding 22 , and the third output winding 23 may be wound in any order. In addition, the winding and the tooth portion 41 are insulated by an insulator formed of insulating paper, coating, or the like.

[0131] In Embodiment 3 o...

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Abstract

The purpose of the present invention is to obtain a rotation angle detecting device that, even when an abnormality such as a disconnection or short circuit occurs, can detect the rotation angle of a rotor in a normal manner, and that can enable a reduction in the number of terminals. Assuming the spatial first order of an output winding means an order with an electrical angle of 360 degrees as onecycle, a phase difference of electrical angle alpha is provided between a first output winding and a second output winding and between the second output winding and a third output winding, with alphais not equal to 180 degrees * n (n being an integer).

Description

technical field [0001] The present invention relates to a rotation angle detection device that detects a rotation angle of a rotor by utilizing a change in permeance in a gap between a rotor and a stator, and a rotating electrical machine using the rotation angle detection device. Background technique [0002] Conventionally, there is known a rotation angle detection device in which three output windings are wound with a phase difference of 120° in electrical angle between each of a plurality of teeth provided on a stator, One end of each output winding is electrically connected to each other, and the other end of each output winding is electrically connected to an output terminal (for example, refer patent document 1, 2). [0003] In addition, there is known a rotation angle detection device in which an output winding is composed of a first system winding and a second system winding, and is wound every other or every two teeth of the stator. In the first system winding and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/20
CPCG01D5/2046G01D5/20H02K11/225H02K1/146H02K1/24
Inventor 池田纮子森田友辅伊藤一将广谷迪冈崎广大阿久津悟泷泽勇二
Owner MITSUBISHI ELECTRIC CORP