JPH081865B2 - Brushless resolver - Google Patents

Description

TECHNICAL FIELD The present invention relates to a brushless resolver, and more particularly to a brushless resolver, which is provided with a rotary transformer capable of high-speed rotation, and which is novel for improving the speed and safety. Related to improvements.

b. Conventional Technology As a brushless resolver of this type that has been used conventionally, various configurations have been proposed, but typical ones will be described here. Although not shown, the rotor of the rotary transformer in the brushless resolver manufactured in-house by the present applicant can be shown in FIG.

That is, what is indicated by reference numeral 1 in FIG.
This is a rotor for a rotary transformer, which is provided in a rotary shaft (not shown), and has a cylindrical shape. A rotor coil mounting groove 2 having a concave shape is formed on the outer peripheral side of the rotor 1 for rotation. ing.

In the rotor coil mounting groove 2, the rotor coil 3 for the rotary transformer, the compound 4, and the coil binding string 5 are attached.
The rotor coil 3 for the rotary transformer is bonded and fixed in the mounting groove 2 for the rotor coil by the compound 4 and the coil binding string 5.

The wall portion 2a of the rotor coil mounting groove 2 is in the axial direction (A).
Is formed in a state of being substantially orthogonal to.

c. Problems to be Solved by the Invention Since the rotor for the rotary transformer in the rotary transformer in the conventional brushless resolver is configured as described above, the brushless resolver can be operated at an extremely high speed (for example, 10,0
When rotated from 00RPM to 35,000RPM, the rotor coil for a rotating transformer sometimes separated due to centrifugal force against the adhesive force of the compound and the binding force of the coil binding string, and was broken.

That is, at the ultra-high speed rotation as described above, the adhesive strength of the compound and the binding force of the coil binding string cannot be endured, and there are problems in reliability and safety.

The present invention has been made to solve the above problems, and in particular, a brushless resolver that includes a rotary transformer that enables high-speed rotation and is capable of improving speed and safety. The purpose is to provide.

d. Means for Solving the Problems A brushless resolver according to the present invention has a stator provided in a casing, a rotor corresponding to the stator, and a rotary transformer interlocking with the rotor and a transformer corresponding to the rotary transformer. In the brushless resolver including the stator, the rotor coil mounting groove provided in the rotary transformer has a wall portion having a non-orthogonal surface with respect to the axial direction.

e. Action In the brushless resolver according to the present invention, since the rotor coil for the rotary transformer in the rotary transformer is provided in the rotor coil mounting groove having a non-orthogonal surface with respect to the axial direction, the rotary transformer is rotated even at an ultrahigh speed. The rotor coil for use does not separate from the mounting groove due to the centrifugal force, and high speed and improved safety can be obtained.

f. Examples Hereinafter, preferred examples of the brushless resolver according to the present invention will be described in detail with reference to the drawings.

The same or equivalent parts as those of the conventional example will be described with the same reference numerals.

1 to 6 show a brushless resolver according to the present invention. First, reference numeral 10 in FIG.
What is indicated by is a brushless resolver portion, and a rotating shaft 13 is rotatably provided at a shaft center position of a casing 11 of the brushless resolver portion 10 via a pair of bearing portions 12.

At the center of the rotary shaft 13, the rotor coil 14a
Is integrally provided with the rotor 14, and the casing 11
Inside the inner side of the
A stator 15 having a is fixedly arranged.

A rotary transformer unit 16 is provided at a position adjacent to the rotor 14 and the stator 15, and the rotary transformer unit 16 is
The casing 11 is composed of a rotary transformer stator 17 having a rotary transformer stator coil 17a and a rotary transformer rotor 1 having a rotary transformer rotor coil 3.

The rotary transformer rotor 1 is provided with a ring-shaped rotor coil mounting groove 2 on its peripheral surface, and a wall portion 2a of the rotor coil mounting groove 2 has an axial line (A ), A concave portion 2b that is a non-orthogonal surface is formed,
It is formed in an uneven shape.

In the rotor coil mounting groove 2, a rotor coil 3 for a rotary transformer is wound and provided, and the compound 4 is bound by a coil binding string and filled with the compound 4. The compound 4 is filled in the recess 2b. Since it has been solidified by being solidified, it does not separate outward (arrow B).

Further, the configuration shown in FIG. 3 is another embodiment of the rotor 1 for a rotary transformer shown in FIG. 2, in which the wall portion 2a of the rotor coil mounting groove 2 forms a taper portion 2c and has a sectional shape. While forming a trapezoid with a narrow outer width,
This taper portion 2c constitutes a non-orthogonal plane with respect to the axis (A).

Therefore, even in the configuration of the rotary transformer rotor 1 in the configuration of FIG. 3, the rotary transformer rotor coil 3,
The binding string 5 and the compound 4 are configured so as not to separate from the rotor coil mounting groove 2.

In the configuration shown in FIG. 4, the rotor 14 of the brushless resolver 10 and the rotary transformer rotor 1 of the rotary transformer 16 are integrally formed, and a pair of rotary transformer rotors 1 are formed on both sides of the rotor 14, and the rotary transformer rotors 1 and 2 are formed. The recess 2b is formed in the inner wall 1a of the rotor coil 1 of the rotor coil 14 of the rotor 14.
It also functions as a stopper for the compound 20 formed in a.

Further, FIG. 5 shows an electrically equivalent circuit of the brushless resolver 10 and the rotary transformer 16 described above.
The figure is a waveform diagram showing rotation angle detection for generating an output by a phase modulation method (PM method).

In the above configuration, when the brushless resolver according to the present invention is operated, the rotor coil 3 and the compound 4 for the rotary transformer in the rotor 1 for the rotary transformer in the rotary transformer 16 are locked by the recess 2b or the taper 2c. Therefore, it is possible to obtain stable continuous high-speed rotation even when super-high-speed rotation is performed at 10,000 RPM to 35,000 RPM without separating from the rotor coil mounting groove 2.

The shape of the wall portion 2a described above is not limited to the uneven shape and the tapered shape, and the same action and effect can be obtained when other rough surface shapes are used.

g. Effects of the Invention Since the brushless resolver according to the present invention is configured as described above, the following effects can be obtained.

(1). Since the compound for holding the rotor coil for the rotary transformer of the rotor for the rotary transformer is held by the non-orthogonal surface such as the uneven portion or the tapered portion formed on the wall portion of the mounting groove for the rotor coil, the rotor for the rotary transformer Even if the rotor is rotated at high speed, the rotor coil for the rotary transformer does not separate from the rotor coil mounting groove and is not disconnected, and stable high speed rotation can be obtained.

(2). Further, by holding not only the rotor for the rotary transformer but also the coil in the rotor of the brushless resolver with the same structure, extremely stable high speed rotation can be obtained.

[Brief description of drawings]

FIGS. 1 to 6 are for showing a brushless resolver according to the present invention. FIG. 1 is a sectional view showing the entire structure, FIG. 2 is an enlarged sectional view showing a rotor for a rotary transformer, and FIG. 3 is a sectional view showing another embodiment of FIG. 2, FIG. 4 is an enlarged sectional view showing another embodiment of the rotor, FIG. 5 is an equivalent circuit diagram, FIG. 6 is a waveform diagram, and FIG. FIG. 6 is a cross-sectional view showing a conventional rotor for rotary transformer. 1 is a rotor for a rotary transformer, 2 is a rotor coil mounting groove for a rotary transformer, 2a is a wall portion, 2b is a recessed portion, 2c is a tapered portion, 3
Is a rotor coil, 4 is a compound, 5 is a coil binding string, 11 is a casing, 14 is a rotor, 15 is a stator, and 16 is a rotary transformer stator.

Claims (4)

[Claims] 1. A stator (15) provided in a casing (11) and a rotor (14) corresponding to the stator (15).
And a rotor (14) interlocking with a rotary transformer (16) in a brushless resolver, the wall portion (2a) of the rotor transformer coil mounting groove (2) provided in the rotary transformer (16). A brushless resolver having a non-orthogonal surface (2b, 2c) with respect to the axial direction. 2. The brushless resolver according to claim 1, wherein the wall portion (2a) is formed in an uneven shape. 3. The brushless resolver according to claim 1, wherein the wall portion (2a) is formed in a tapered shape. 4. A rotor coil (3) for a rotary transformer and a compound (4) in the mounting groove (2) for the rotor coil.
The brushless resolver according to any one of claims 1 to 3, further comprising: a coil binding string (5).