Angle sensor

Abstract

An angle sensor includes a sensor rotor formed with a planar coil and a sensor stator including a multi-X type planar coil placed to face a surface of the sensor rotor. On a stator substrate of the sensor stator are provided forward-direction planar coils and reverse-direction planar coils, and positive and negative terminals adjacently arranged. The forward-direction and reverse-direction planar coils are connected in series through connecting wires. One of both ends of the series-connected planar coils is connected to the positive terminal through the wire and the other end is connected to the negative terminal through the wire. The wires are arranged along arrangement of the series-connected planar coils but in a range less than a full circle of the arrangement. A turn-back connecting wire extending from one end of the series of planar coils is arranged along the other connecting wire and connected to the negative terminal.

Description

technical field [0001] The present invention relates to an angle sensor for detecting the rotation angle of an output shaft of an electric motor or an engine. Background technique [0002] Conventionally, as such a technique, for example, a flat resolver (resolver) described in Patent Document 1 below is known. This flat resolver includes a fixed side core, a movable side core, and a plurality of multi-X-shaped sheet coils (sheet coils) provided on the surface of the fixed side core. Furthermore, the connecting wires connecting the plurality of sheet coils are connected so as to go around the fixed-side core substantially once. [0003] In addition, there is known a chip-coil resolver described in Patent Document 2 below. The resolver has an excitation phase coil and a detection phase coil. In the excitation phase coil, a helical coil (planar coil) is provided on the front side of the insulating film layer, and a helical coil (planar coil) wound in the opposite direction ...

AI Technical Summary

Problems solved by technology

[0008] However, in the flat resolver described in Patent Document 1, since the connecting wire for connecting the chip coils is substantially formed in a large loop, it may function as an antenna and be received from the outside. The influence of electromagnetic noise

[0009] In addition, in the resolver described in Patent Document 2, the shape of the helical coil wound in the forward direction is asymmetrical to the shape of the helical coil wound in the reverse direction, so that the magnetic flux density of each helical coil becomes non-uniform. , is easily affected by electromagnetic noise from the outside, which becomes the cause of the output error of the resolver

[0010] In addition, in the resolver described in Patent Document 3, since the secondary pattern of the transformer and the primary pattern of the transformer are provided separately from the two sheet coils, separate mounting work and wiring are required, resulting in poor reliability and productivity.

In addition, since the secondary pattern of the transformer and the primary pattern of the transformer are arranged to face each other only through a gap, there is a possibility that magnetic flux may leak between the two, which may cause a detection error and cause a problem in terms of reliability.

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