JP2009133647A - Redundancy type angle detecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure which enables reduction of the number of components and simplification of the structure and further enables prevention of interference between resolvers due to a leakage flux, in regard to a redundancy type angle detecting structure constituted of a plurality of resolvers. <P>SOLUTION: The redundancy type angle detecting structure 21 includes two or more resolvers 22, 23, .... In an apparatus 28 to which the structure is applied, the resolvers 22, 23, ... are provided in series on the same axis as an input shaft 26 which connects to the apparatus. Between the adjacent resolvers 22 and 23, a space S is provided so that they do not cause interference with each other due to the leakage flux. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a redundant angle detection structure, and in particular, a redundant angle detection that can prevent a decrease in angle detection accuracy when a specific configuration is adopted in an angle detection structure configured from a plurality of resolvers for the purpose of failure handling. Concerning structure.

  Angle detectors such as resolvers are used in a wide range of industrial fields, and high-precision detection functions are required even in environments that are used continuously for a long time, in environments with temperature and humidity conditions, and other physical loads. . As a countermeasure against failure in such a case, a redundant angle detection structure is used.

  As a conventional redundant angle detection structure, for example, a configuration is adopted in which a resolver is provided in parallel to the input shaft of the angle detection structure through two gears from one output shaft from the rotating electrical machine to be detected. Has been. This is an internal technology of the applicant of the present application and has not been disclosed, so there is no patent document specifically described in the present application.

  However, in the conventional method, it is necessary to divide one output shaft into two or more systems, so the number of parts is increased, the structure is complicated, and adjustments between the input shafts are also required, which is also costly in the manufacturing process. There was also a problem in maintaining the performance as well as in the above.

  Therefore, the problem to be solved by the present invention is that the angle detection structure composed of a plurality of resolvers for the purpose of failure handling can reduce the number of parts, simplify the structure, and eliminate the need for adjustment between the input shafts. It is an object of the present invention to provide a redundant angle detection structure that is improved in terms of manufacturing process, cost, and performance maintenance.

  Furthermore, the subject of this application is providing the redundant type | mold angle detection structure which can prevent angle detection accuracy fall, when taking such a novel structure.

  As a result of studying the above problems, the present inventor has found that the above problems can be solved by providing a resolver in series on the same axis without dividing the system on the input side. That is, the invention claimed in the present application, or at least the disclosed invention, as means for solving the above-described problems is as follows.

(1) A redundant angle detection structure comprising two or more resolvers, wherein each resolver is provided in series on the same axis.
(2) The redundant angle detection structure according to (1), wherein each of the resolvers is provided so as not to cause interference between the resolvers.
(3) The redundant angle detection structure according to (1), wherein each of the resolvers is provided with an interval of 10 mm or more so as not to cause interference between resolvers.
(4) Each of the resolvers is in a signal format of one phase excitation / 2 phase output, 2 phase excitation / 1 phase output, or 2 phase excitation / 2 phase output. The redundant angle detection structure according to any one of (3).

  Since the redundant angle detection structure of the present invention is configured as described above, according to this, the number of parts can be reduced and the structure can be simplified. Further, there is no adjustment between the input shafts, that is, no adjustment between the resolvers is required. Therefore, it is advantageous not only in manufacturing process and manufacturing cost but also in maintaining performance. Furthermore, in the redundant angle detection structure of the present invention in which the resolver arrangement interval is devised, it is possible to effectively prevent a decrease in angle detection accuracy.

Hereinafter, the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing the configuration of the redundant angle detection structure of the present invention. As shown in the figure, the present redundant type angle detection structure 1 is composed of two or more resolvers 2, 3,..., And each resolver 2, 3,. The main configuration is that the device 8 is provided in series on the same axis as the input shaft 6 connected thereto. In the figure, there are two or three resolvers, but the number of resolvers used in the present invention is not particularly limited. The resolvers 2, 3,... Arranged in series are protected by the resolver protector 4.

  With this configuration, the number of gears and shafts is reduced as compared with the conventional redundant angle detection structure, and the structure is simplified. Moreover, in the conventional parallel type, the number of input shafts required for the number of resolvers is required. However, in the configuration of the present invention, since there is only one common input shaft, adjustment between the input shafts and adjustment between the resolvers are not performed. It is unnecessary.

  FIG. 2 is a cross-sectional view showing another configuration example of the redundant angle detection structure of the present invention. As shown in the figure, the redundant angle detection structure 21 is based on the configuration described with reference to FIG. 1, and is adjacent between the resolvers 22, 23,..., That is, between the resolver 22 and the resolver 23. A characteristic configuration is that the two resolvers are spaced apart from each other as shown by the interval S so as not to cause interference due to leakage magnetic flux.

  The interval S is not particularly limited depending on the specifications of the resolver 22 and the like to be used. However, regardless of the specifications, by setting the interval S to 10 mm or more, interference due to leakage magnetic flux can be effectively prevented.

  In other words, in the redundant angle detection structure 1 of the present invention shown in FIG. 1, if the distance between the resolvers 2, 3 etc. is too small, the leakage magnetic flux of each resolver 2, 3 etc. interferes with the adjacent resolver. there's a possibility that. As a result, a decrease in angle detection accuracy may occur. However, such a disadvantage does not occur in the redundant angle detection structure 21 of the example shown in FIG. Therefore, it is a more preferable configuration example as the redundant angle detection structure of the present invention.

  According to the redundant angle detection structure of the present invention, there are advantages in terms of the manufacturing process and the manufacturing cost due to the reduction in the number of parts and the simplification of the structure. Furthermore, it is advantageous in terms of maintaining performance, and does not cause a decrease in angle detection accuracy. Therefore, the invention has high utility value in the related industrial field.

It is sectional drawing which shows the structure of the redundant type | mold angle detection structure of this invention. It is sectional drawing which shows another structural example of the redundant type | mold angle detection structure of this invention.

Explanation of symbols

1, 21 ... Redundant type angle detection structure 2, 3, 22, 23 ... Resolver 2, 3
4, 24, resolver protector 6, 26, input shafts 8, 28, device S to which the redundant angle detection structure is applied S, the distance between the resolvers

Claims (4)

A redundant angle detecting structure comprising two or more resolvers, wherein each resolver is provided in series on the same axis. The redundant angle detection structure according to claim 1, wherein each of the resolvers is provided so as not to cause interference between the resolvers. The redundant angle detection structure according to claim 1, wherein each of the resolvers is provided with an interval of 10 mm or more so as not to cause interference between resolvers. 4. The resolver according to claim 1, wherein each of the resolvers has a signal format of one-phase excitation / 2-phase output, 2-phase excitation / 1-phase output, or 2-phase excitation / 2-phase output. The redundant type angle detection structure according to claim 1.

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