JPH1189205A - Motor with high frequency power-generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor with high frequency power-generator which does not require a large number of parts and can be assembled with less man-hour. SOLUTION: A resin-based magnet 10 for high frequency power-generation is fixed to the outer peripheral surface of a cup-like yoke 7 which constitutes part of the rotor 14 of a motor section 1 and a fixed cylindrical body 11 is concentrically arranged around the outer peripheral surface of the yoke 7 with a clearance in between in the radial direction. Then, a coil pattern 12 for high frequency power-generation is provided along the inner peripheral surface of the cylindrical body 11. The cylindrical body 11 is formed of a plastic. The pattern 12 formed of a plated circuit pattern along the inner peripheral surface of the cylindrical body 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor with a frequency generator provided with a frequency generator using a magnet for frequency generation and a coil pattern for frequency generation.

[0002]

2. Description of the Related Art FIGS. 2 and 3 show an example of a motor with a frequency generator in which a frequency generator 2 is assembled to a conventional brushless motor unit 1 of this kind.

The brushless motor unit 1 includes a cylindrical boss 3B having a flange 3A at one end of the outer periphery, a stator 4 fixed to the outer periphery at the other end of the boss 3B, and a bearing 5 inside the boss 3B. A rotating shaft 6 rotatably penetrated through the shaft, and a field permanent magnet 8 fixed to one end of the rotating shaft 6 and facing the stator 4 attached to the inner periphery of a cup-shaped yoke 7. And a child 14. Although not shown in detail, the stator 4 includes a stator core and coils wound around a plurality of salient poles on the outer periphery thereof.
The yoke 7 includes a cylindrical portion 7a and a bottom portion 7b closing the bottom side of the cylindrical portion 7a. Permanent magnet 8
Is fixed to the inner periphery of the cylindrical portion 7a by a known means. A printed circuit board 9 is fixed to the flange 3A by screws or the like so as to face the stator 4. A controller for driving and controlling the brushless motor unit 1 is mounted on the printed circuit board 9.

The frequency generator 2 includes a brushless motor 1
And the resin-based frequency power generation magnet 10 fixed to the outer peripheral surface of the cylindrical portion 7a of the cup-shaped yoke 7 and the concentrically arranged radially spaced apart from the outer peripheral surface of the cylindrical portion 7a of the yoke 7. Fixed cylinder 11 ′ and fixed cylinder 11
And a coil pattern 12 for frequency power generation provided along the inner peripheral surface of '. The fixed cylinder 11 'is made of iron, and is fixed to the printed circuit board 9 with screws or the like.

The coil pattern 12 for frequency power generation is provided on a flexible printed circuit board 13 by printing as a rectangular wave pattern as shown in FIG. In this case, the frequency power generation coil pattern 12 includes a rectangular wave-shaped coil pattern portion 12a and the coil pattern portion 12a.
a of the lead pattern portions 12b, 1
2c. Flexible printed circuit board 13 provided with such frequency power generation coil pattern 12
Are attached and fixed along the inner peripheral surface of the fixed cylindrical body 11 ′.

The frequency generating magnet 10 and the frequency generating coil pattern 12 on the flexible printed circuit board 13 are radially opposed to each other with a gap g therebetween.

FIG. 4 shows another example of a motor with a frequency generator in which a frequency generator 2 is assembled to a conventional brushless motor unit 1 of this type. In addition,
Parts corresponding to those in FIGS. 2 and 3 are denoted by the same reference numerals.

[0008] The structure of the brushless motor unit 1 of this example is as follows.
This is the same as the structure of FIG. 2 described above.

The frequency generator 2 mounted on the brushless motor unit 1 includes a resin-based frequency power generation magnet 10 fixed to the outer peripheral surface of the cylindrical portion 7a of the cup-shaped yoke 7, Fixed cylindrical body 1 concentrically arranged with a gap in the radial direction with respect to the outer peripheral surface of cylindrical portion 7a
1 'and a frequency power generation coil pattern 12 provided along the inner peripheral surface of the fixed cylindrical body 11'. The fixed cylinder 11 ′ is also made of iron, and is fixed to the printed circuit board 9 by screws or the like. The frequency power generation coil pattern 12 is provided in the shape shown in FIG. 3 by directly printing on the inner peripheral surface of the fixed cylindrical body 11 ′.

[0010]

However, FIG.
In both the frequency generator 2 shown in FIG. 3 and the frequency generator 2 shown in FIG. 4, the fixed power generation magnet 10 is made of a resin-based material, and the fixed cylindrical body 11 ′ that is the base of the frequency power generation coil pattern 12 is made of iron. Since the two systems have different expansion coefficients, the gap g between the frequency power generation magnet 10 and the frequency power generation coil pattern 12 due to a temperature change must be taken into account and the gap g must be strictly controlled. . Therefore, there is a problem that the number of assembling steps is increased, and there is a problem that the environment and conditions under which the frequency generator 2 can be used are also limited.

An object of the present invention is to provide a motor with a frequency generator which can reduce the number of assembly steps without increasing the number of parts.

Another object of the present invention is to provide a motor with a frequency generator that can expand the usable environment and conditions.

[0013]

According to the present invention, there is provided a resin-based frequency power generation magnet fixed to a peripheral surface of a cup-shaped yoke which forms a part of a rotor of a motor portion, and a magnet for the peripheral surface of the yoke. To improve a motor with a frequency generator having a fixed cylindrical body concentrically arranged with a gap in the radial direction and a frequency power generation coil pattern provided along a peripheral surface of the fixed cylindrical body. .

In the present invention, the fixed cylinder is formed of plastic. The frequency power generation coil pattern provided along the peripheral surface of the plastic fixed cylinder is:
It is formed by a plating circuit pattern. More specifically, in the present invention, the fixed cylinder is formed of engineering plastic. The frequency power generation coil pattern provided along the peripheral surface of the fixed cylinder made of engineering plastic is formed by an electroless plating circuit pattern.

In the motor with a frequency generator having such a structure, the frequency generating magnet is made of a resin, and the fixed cylindrical body, which is the base of the frequency generating coil pattern, is made of a resin. In addition, a change in the gap between the frequency power generation magnet and the frequency power generation coil pattern due to a temperature change is reduced. For this reason, it is not necessary to consider the temperature change, the management range at the time of assembly can be expanded, and the number of assembling steps can be reduced.

Further, the use range (temperature, pulse number) of the frequency generator can be expanded without increasing the number of management steps. That is, the environment and conditions under which the motor with a frequency generator can be used can be expanded.

[0017]

FIG. 1 shows an example of an embodiment in which the present invention is applied to a motor with a frequency generator in which a frequency generator 2 is assembled to a brushless motor unit 1. FIG. The structure of the brushless motor unit 1 of this example is the same as the structure of FIG. 2 described above.

The frequency generator 2 mounted on such a brushless motor unit 1 includes a brushless motor unit 1
Of the cup-shaped yoke 7 forming a part of the rotor 14 of FIG.
a, a resin-based frequency power generating magnet 10 fixed to the outer peripheral surface of the yoke 7; and a fixed cylindrical body 11 concentrically arranged with a gap in the radial direction with respect to the outer peripheral surface of the cylindrical portion 7a of the yoke 7.
And a frequency generating coil pattern 12 provided along the inner peripheral surface of the fixed cylindrical body 11. As the resin-based frequency power generation magnet 10, for example, a plastic magnet can be used. The fixed cylinder 11 is formed of a three-dimensional injection-molded product of a plastic, more preferably an engineering plastic, more preferably, and is fixed to the printed circuit board 9 by screws or the like. As the resin-based fixed cylinder 11, for example, polyphenylene sulfide (PPS) or the like can be used. The frequency power generation coil pattern 12 is formed on the inner peripheral surface of the fixed cylindrical body 11 made of the three-dimensional injection-molded product as a plating circuit pattern by a selective electroless plating method in a more preferable example. .
The fixed cylindrical body 11 provided with such a frequency power generation coil pattern 12 is a three-dimensional injection molded circuit component (MID: Mo).
lded Interconnect Device)
It can be easily formed as

In the motor with a frequency generator having such a structure, the frequency generating magnet 10 is made of a resin, and the fixed cylindrical body 11 which is the base of the frequency generating coil pattern 12 is made of a resin. Because of the approximation, the change in the gap g between the frequency power generation magnet 10 and the frequency power generation coil pattern 12 due to a temperature change is small. For this reason, it is not necessary to consider the temperature change, the management range at the time of assembly can be expanded, and the number of assembling steps can be reduced.

Further, the use range (temperature, pulse number) of the frequency generator can be widened without increasing the number of management steps. That is, the environment and conditions under which the motor with a frequency generator can be used can be expanded.

In the above example, the resin-based frequency power generation magnet is attached to the outer peripheral surface of the cup-shaped yoke of the motor section, and the frequency power generation coil pattern is provided on the inner peripheral surface of the resin-based fixed cylinder. A resin-based fixed cylinder is concentrically arranged in a cylindrical yoke, a resin-based frequency power generation magnet is mounted on the inner peripheral surface of the annular rotating body, and a frequency-generated coil is mounted on the outer peripheral surface of the resin-based fixed cylinder. The pattern can also be provided as described above.

[0022]

In the motor with a frequency generator according to the present invention, the frequency generating magnet is made of a resin, and the fixed cylindrical body which is the base of the frequency generating coil pattern is made of a resin. The change in the gap between the frequency power generation magnet and the frequency power generation coil pattern due to temperature change is small, so that it is not necessary to consider the temperature change, and it is possible to widen the control range at the time of assembly and reduce the number of assembly steps. be able to. Further, the environment and conditions under which the motor with a frequency generator can be used can be expanded.

[Brief description of the drawings]

FIG. 1 is a partially longitudinal side view showing an example of an embodiment of a motor with a frequency generator according to the present invention.

FIG. 2 is a partially longitudinal side view of an example of a conventional motor with a frequency generator.

FIG. 3 is a plan view of a flexible printed circuit board having a coil pattern for frequency power generation used in the example of FIG. 2;

FIG. 4 is a partially longitudinal side view of another example of a conventional motor with a frequency generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Brushless motor part 2 Frequency generator 3A flange 3B Boss 4 Stator 5 Bearing 6 Rotation shaft 7 Yoke 7a Tube part 7b Bottom part 8 Permanent magnet 9 Printed circuit board 10 Magnet for frequency generation 11, 11 'Fixed cylinder 12 Frequency generation coil Pattern 12a Coil pattern part 12b, 12c Lead pattern part 13 Flexible printed board 14 Rotor

Claims (2)

[Claims] 1. A resin-based frequency power generation magnet fixed to a peripheral surface of a cup-shaped yoke forming a part of a rotor of a motor unit, and a gap in a radial direction with respect to the peripheral surface of the yoke. In a frequency generator-equipped motor comprising a concentrically arranged fixed cylinder and a frequency power generation coil pattern provided along the peripheral surface of the fixed cylinder, the fixed cylinder is formed of plastic, A frequency generator coil pattern provided along a peripheral surface of a fixed cylindrical body made of stainless steel, wherein the frequency generator coil pattern is formed by a plating circuit pattern. 2. A resin-based frequency power generation magnet fixed to a peripheral surface of a cup-shaped yoke which forms a part of a rotor of a motor unit, and a gap in a radial direction with respect to the peripheral surface of the yoke. In a motor with a frequency generator including a fixed cylinder concentrically arranged and a coil pattern for frequency generation provided along a peripheral surface of the fixed cylinder, the fixed cylinder is formed of engineering plastic. A motor with a frequency generator, characterized in that the coil pattern for frequency generation provided along the peripheral surface of the fixed cylinder made of engineering plastic is formed by an electroless plating circuit pattern.