JP2001218431A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor capable of generating a high torque with a compact structure by a structure having two rotors at a central side and an outer peripheral side via a stator. SOLUTION: The motor comprises the first rotor fixed to an output shaft to form a first field by a disposed permanent magnet, the stator disposed at an outer peripheral side of the first rotor to form an armature by laminated steel sheets to become a magnetic path and an armature winding arranged in the slot of the plates, and the second rotor connected to the output shaft disposed at the outer peripheral side of the stator to form a second field by the disposed permanent magnet. In this case, the stator has a first armature winding for generating a rotary torque between the first rotor and the second rotor and a second armature winding for generating a rotary torque between the second rotor and the first rotor. Thus, the first and second windings are solely or commonly driven.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric motor having two rotors on a center side and an outer side of a stator.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, an electric motor has a one-to-one correspondence between a stator 72 and a rotor 73, and the rotor 73 is rotated by torque generated between the two.
4 was generally used to transmit torque.

[0003]

However, in the structure described above, the motor is integrated with a hermetic compressor or the like, and it is difficult to obtain a predetermined torque when the volume occupied by the motor is limited. There was a problem that it might occur.

The present invention has been made under such a background, and has a structure having two rotors on the center side and the outer peripheral side with a stator interposed therebetween, so that a compact and high torque can be generated. An object is to provide an electric motor.

[0005]

According to the first aspect of the present invention, a first magnet is provided by a permanent magnet fixed to and arranged on an output shaft.
A first rotor forming a magnetic field of the first rotor, a laminated steel plate disposed on the outer peripheral side of the first rotor and serving as a magnetic path, and an armature winding disposed in a slot of the laminated steel plate. And a second rotor arranged on the outer peripheral side of the stator, connected to the output shaft, and forming a second magnetic field with the arranged permanent magnet. I will provide a.

According to the present invention, there is provided a magnet motor having two first and second rotors on a center side and an outer peripheral side with a stator interposed therebetween, the two rotors being fixed to one output shaft. Is done.

According to a second aspect of the present invention, in the electric motor according to the first aspect, a first armature winding for generating rotation torque between the stator and the first rotor. And a second armature winding for generating a rotating torque between the second armature and the second rotor. The first armature winding and the second armature winding It is characterized by being driven independently or in common.

According to the present invention, the stator is provided with two armature windings for the first rotor and the second rotor,
An electric motor capable of supplying drive power to these armature windings simultaneously or independently is provided.

According to a third aspect of the present invention, in the electric motor according to the first or second aspect, the first rotor and the second rotor have the same number of magnetic poles.

According to the present invention, the first rotor and the second rotor have the same number of field magnetic poles, and the first armature winding and the second armature winding are simultaneously performed. An electric motor for driving is provided.

According to a fourth aspect of the present invention, in the electric motor according to the first or second aspect, the first rotor and the second rotor have different numbers of magnetic poles from each other, and
Or any one of the second armature winding and the second armature winding is driven.

According to the present invention, the first rotor and the second rotor have different numbers of magnetic poles, and one of the armature windings is driven to provide a two-speed motor. .

According to a fifth aspect of the present invention, in the electric motor according to the first aspect, any one of the first rotor and the second rotor is replaced with a permanent magnet, and a magnetic path is provided. And a short-circuited winding or a short-circuited cage disposed in a slot of the laminated steel sheet and passing an induced current by a magnetic field generated by a drive current of the armature winding.

According to the present invention, a short-circuit winding or a short-circuit cage is provided in one of the first rotor and the second rotor for causing an induced current to flow by a magnetic field generated by a driving current of the armature winding. One can be an induction motor and the other can be a magnet motor.

According to a sixth aspect of the present invention, in the electric motor according to the fifth aspect, a first armature winding for generating rotation torque between the armature and the first rotor. And a second armature winding for generating a rotating torque between the second armature and the second armature winding, wherein any of the first armature winding or the second armature winding is provided. It is characterized by driving one or more.

According to the present invention, for example, a large starting torque is obtained by driving the armature winding forming the induction motor at the start of the motor and driving the armature winding forming the magnet motor after the start is completed. It can be an electric motor.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a configuration of an electric motor according to one embodiment of the present invention. In this figure, reference numeral 2 is a stator, 3 is a first rotor, 4 is an output shaft, 5 is a second rotor, and both the first rotor 3 and the second rotor 5 are output shafts. 4 is fixed.

FIG. 2 is a longitudinal sectional view showing the structure of a motor without an outer cover according to one embodiment of the present invention, and FIG. 3 is a longitudinal sectional view showing the structure of a motor with an outer cover according to one embodiment of the present invention. .

In FIG. 2, the stator 2 is fixed to a motor mount 6 via a fixture 7. The first rotor 3 is fixed to the output shaft 4 by shrink fitting, and the output shaft 4 is rotatable by bearings 10 and 11 fitted in the motor mount 6 and the fixture 8 attached to the stator. It is fixed to. The output shaft 4 has the first
In addition to the rotor 3, the second rotor 5 is fixed to the output shaft 4 by the second rotor fixture 9, and the first rotor 3 and the second rotor 5 perform the same rotation. It has become.

In FIG. 3, the stator 2 is fixed to a motor mount 6 via a fixture 7. The first rotor 3 is fixed to the output shaft 4 by shrink fitting, and the output shaft 4 has a bearing 10 and a bearing 11 fitted in the motor mount 6.
It is rotatably fixed by. The motor mounting base 6 in this figure is also an outer frame of the motor. The output shaft 4 has a second rotor 5 in addition to the first rotor 3.
And the first rotor 3 and the second rotor 5 rotate in the same manner.

FIG. 4 shows a first configuration diagram, FIG. 5 shows a second configuration diagram, and FIG. 6 shows a third configuration diagram of the motor having the structure described with reference to FIG. 2 or FIG.

In the first configuration diagram shown in FIG. 4, the stator 2 is made of a laminated steel plate, and a first armature winding (not shown) is provided on a side opposite to the first rotor 3. A slot for accommodating a second armature winding (not shown) is provided on the side facing the rotor 5 of the first embodiment, and an insulating plate 2a is provided to avoid mutual interference. The first rotor driven by the first armature winding has four permanent magnets 3a.
Are provided, and the second rotor driven by the second armature winding is also provided with four permanent magnets 5a to constitute a motor having the same number of poles.

When the driving power is independently applied to the first armature winding or the second armature winding of the motor having such a configuration, the motors operate as magnet motors having the same speed. If drive power is applied in common to both armature windings, one output shaft is driven by two magnet motors, and a large torque can be obtained as a motor having the same volume.

In the second structural view shown in FIG. 5, the stator 2 is made of a laminated steel plate, and a first armature winding (not shown) is provided on a side facing the first rotor 3. A slot for accommodating a second armature winding (not shown) is provided on the side facing the rotor 5 of the first embodiment, and an insulating plate 2a is provided to avoid mutual interference. The first rotor driven by the first armature winding has four permanent magnets 3a.
Are provided, and a second rotor driven by the second armature winding is provided with eight permanent magnets 5a to constitute a motor having a different number of poles.

When drive power is independently applied to the first armature winding or the second armature winding of the electric motor having such a configuration, compared to when the drive power is applied to the second armature winding, When drive power is applied to the first armature winding, the first armature winding rotates at twice the rotation speed and operates as a two-speed magnet motor with the same drive power.

Next, in the third configuration diagram shown in FIG.
The magnet motor composed of the permanent magnet provided on the rotor and the first armature winding is the same as the configuration shown in FIG. 4 or FIG. 5, but the permanent magnet is provided on the second rotor 5. Instead, a short-circuit winding or a short-circuit cage (not shown) for passing an induction current by a magnetic field generated by the second armature is buried in a slot provided in the laminated steel plate, and is operated as an induction motor.

With such a configuration, it is possible to adopt a control method such as starting the induction motor having a large starting torque and performing a synchronous speed operation by the magnet motor after the start is completed.

The operation of one embodiment of the present invention has been described above in detail with reference to the drawings. However, the present invention is not limited to this embodiment, and a design change or the like may be made without departing from the gist of the present invention. The present invention is also included in the present invention. For example, the number of poles of the permanent magnet is not limited to that shown in the embodiment.

[0029]

As described above, according to the present invention, one motor is provided with two rotors and these two rotors are provided.
Since the two rotors are driven simultaneously or individually, when the two rotors are driven at the same number of poles and driven simultaneously, an effect of increasing the torque can be obtained. In addition, when the two rotors have different numbers of magnetic poles and are driven individually, there is an effect that a multi-speed electric motor can be provided. Further, there is an effect that the control method can be diversified, for example, one of the rotors is used for starting and the other rotor is used for constant driving.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a configuration of an electric motor according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing the structure of an electric motor without an outer cover according to an embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing the structure of the motor with an outer cover according to one embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a first configuration of the electric motor according to the embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a second configuration of the electric motor according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a third configuration of the electric motor according to the embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a configuration of a motor according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 ... Stator 3 ... 1st rotor 4 ... Output shaft 5 ... 2nd rotor 6 ... Motor mount 7 ... Fixture 8 ... Fixture 9 ... 2nd rotor fixture 10, 11 ... Bearing 2a ... Insulating plate 2b End plate 3a Permanent magnet 5a Permanent magnet

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] June 16, 2000 (2006.1.
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

According to a second aspect of the present invention, in the electric motor according to the first aspect, a first armature winding for generating rotation torque between the stator and the first rotor. When, and a second armature winding for generating a rotational torque between the second rotor, the first armature winding and the second armature winding It is characterized in that drive power is applied independently or in common.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

According to the present invention, the first rotor and the second rotor have the same number of field poles, and the first armature winding and the second armature winding are simultaneously performed. An electric motor for applying driving power is provided.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

According to a fourth aspect of the present invention, in the electric motor according to the first or second aspect, the first rotor and the second rotor have different numbers of magnetic poles from each other, and
And wherein the addition of drive power to any one of the armature windings of the armature winding or the second armature winding.

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

According to the present invention, the first rotor and the second rotor have different numbers of magnetic poles, and drive power is applied to one of the armature windings to form a two-speed motor. Can be.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction contents]

According to a sixth aspect of the present invention, in the electric motor according to the fifth aspect, the armature has a first armature winding for generating a rotational torque between the armature and the first rotor. A second armature winding for generating a rotating torque between the wire and the second rotor, wherein the first armature winding or the second armature winding has a second armature winding. of which any one of the electrodeposition
It is characterized in that drive power is applied to the armature winding .

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

According to the present invention, for example, the armature winding forming the induction motor is driven when the motor is started, and drive power is applied to the armature winding forming the magnet motor after the start is completed.
By that, it can be an electric motor having a large starting torque.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihiro Noguchi 60-1 Kutsubo, Iwazuka-cho, Nakamura-ku, Nagoya-shi, Aichi F-term (reference) in Nakanishi Engineering Co., Ltd. 5H621 AA03 BB02 GA01 GA16 GA17 HH01 JK02 JK07 JK18 JK19

Claims (6)

[Claims] 1. A first rotor fixed to an output shaft and forming a first field by a permanent magnet disposed therein, and a lamination disposed on an outer peripheral side of the first rotor and serving as a magnetic path. A steel sheet and a stator that forms an armature by armature windings disposed in slots of the laminated steel sheet; and a stator disposed on an outer peripheral side of the stator and connected to the output shaft,
A second rotor that forms a second magnetic field with the arranged permanent magnets. 2. The stator according to claim 1, wherein the stator generates a rotating torque between a first armature winding for generating a rotating torque between the first rotor and the second rotor. And a second armature winding for driving the first armature winding and the second armature winding independently or in common. An electric motor as described. 3. The apparatus according to claim 1, wherein the first rotor and the second rotor have the same number of magnetic poles.
An electric motor according to claim 1. 4. The first rotor and the second rotor have different numbers of magnetic poles, and each one of the first armature winding and the second armature winding has a different number of magnetic poles. The electric motor according to claim 1, wherein the armature winding is driven. 5. A laminated steel sheet serving as a magnetic path instead of the permanent magnet of any one of the first rotor and the second rotor, and the electric motor disposed in a slot of the laminated steel sheet. The electric motor according to claim 1, further comprising a short-circuit winding or a short-circuit cage through which an induced current flows by a magnetic field generated by a driving current of the slave winding. 6. The armature generates a rotating torque between a first armature winding for generating a rotating torque with the first rotor and the second rotor. And a second armature winding for driving one of the first armature winding and the second armature winding. Electric motor.