CN1307773C - rotating electrical machine - Google Patents

Abstract

In the rotating electrical machine of the present invention, the housing (2) and the frame (3) are mutually fitted structures, the stator (4) is fixed on the frame (3), and the rotor (15) is rotatably supported in the stator (4). The resolver (19) is installed by setting the resolver rotor (24) on the rotor (15) and fixing the resolver stator (26) on the housing (2), and the connection installed on the resolver (19) The opening of the device (21) is arranged toward the outside of the motor (1). The rotary electric machine provided by the present invention can not only shorten the total length of the electric machine, but also can install the connector from the outside of the electric machine.

Description

rotating electrical machine

technical field

The present invention relates to a rotating electrical machine with a resolver, and in particular to an installation structure when the resolver is installed on a DC brushless motor.

Background technique

In conventional direct current (DC) brushless motors, the rotary position sensor that detects the rotational position of the rotor, that is, the connector of the VR (variable reluctance) resolver is located inside the motor, and is electrically connected to the ECU outside the motor by wires ( For example, refer to Japanese Patent Document 1: JP-A-2001-78393, FIG. 1).

Conventional DC brushless motors with a resolver have the above structure, so the connection between the resolver and the wires is carried out inside the motor, requiring space for the connectors and wires, so the length of the motor shaft becomes longer and the assembly is difficult.

The present invention aims to solve the above problems, and an object of the present invention is to provide a DC brushless motor that not only shortens the overall length of the motor, but also has a resolver that facilitates assembly by attaching a connector from the outside of the motor.

Contents of the invention

In the rotating electric machine according to claim 1 of the present invention, the rotating electric machine stator is fixed to a frame fitted with the casing, the rotating electric machine rotor is rotatably supported in the rotating electric machine stator, and the rotating electric machine is installed in the rotating electric machine. A resolver having a resolver rotor and a resolver stator, the resolver stator is provided on the outer periphery of the resolver rotor and fixed to the casing, and is characterized in that the The opening of the upper connector is disposed toward the outside of the rotating electric machine.

In the rotating electric machine according to claim 1 of the present invention, the rotating electric machine stator is fixed to a frame fitted with the casing, the rotating electric machine rotor is rotatably supported in the rotating electric machine stator, and the rotating electric machine is installed in the rotating electric machine. A resolver having a resolver rotor and a resolver stator, the resolver stator is provided on the outer periphery of the resolver rotor and fixed to the casing, and is characterized in that the The opening of the upper connector is disposed toward the outside of the rotating electrical machine. Therefore, the overall length of the rotary electric machine can be shortened, and the connector can be easily attached.

Description of drawings

Fig. 1 is a front view showing a DC brushless motor according to Embodiment 1 of the present invention.

Fig. 2 is a side sectional view showing a DC brushless motor according to Embodiment 1 of the present invention.

Fig. 3 is a front view showing the resolver.

Fig. 4 is a side view showing the resolver.

Fig. 5 is a side sectional view showing a DC brushless motor.

Fig. 6 is a front view showing a DC brushless motor according to Embodiment 2 of the present invention.

Fig. 7 is a side sectional view showing a DC brushless motor according to Embodiment 2 of the present invention.

Fig. 8 is a front view showing a DC brushless motor according to Embodiment 3 of the present invention.

Fig. 9 is a side sectional view showing a DC brushless motor according to Embodiment 3 of the present invention.

Detailed ways

Embodiment 1

Fig. 1 is a front view showing a DC brushless motor with a resolver according to Embodiment 1 of the present invention, and Fig. 2 is a side sectional view.

Here, the resolver refers to a rotation angle sensor composed only of windings, which is the same as a transformer in principle, but differs from the transformer in that the core is divided into a rotor and a stator.

The excitation coil is provided to the stator, and the detection coil and resolver are provided to the rotor, and the principle that the phase difference of the output voltage relative to the excitation voltage is proportional to the rotation angle is applied.

The phase angle of the phase output voltage with respect to the excitation voltage becomes the shaft angle.

In Fig. 1 and Fig. 2, the case 2 and the frame 3 constituting the DC brushless motor 1 are mutually fitted, and the stator 4 for the rotating electric machine is fixed on the frame 3. A motor coil 6 is wound around the stator 4 for a rotating electrical machine via an insulator 5 for insulation. The bracket 7 and the insulator 5 are fixed by a snap fit, and the terminal 8 arranged in the bracket 7 is connected to the motor coil 6 by melting.

The base 9 adjacent to the bracket 7 has a nut 10 inside, and the terminal 11 is fixed on the side of the nut 10 .

Terminal 8 and terminal 11 are connected by TIG welding, terminal 11 and terminal 12 are clamped and connected from both sides by nut 10 and screw 13 arranged in base 9 , terminal 12 is connected with wire 14 for motor.

The rotor 15 for a rotating electrical machine is held by a bearing 16 provided at an end of the frame 3 and is held by a front bearing 17 fixed to the case 2 by calking.

In addition, a ring magnet 18 is attached to the rotor 15 for a rotating electric machine.

FIG. 3 is a front view showing a resolver 19 installed in a DC brushless motor, and FIG. 4 is a side view of the same member, and the resolver 19 is provided with a male-side connector 20 .

The part indicated by oblique lines in FIG. 2 is the resolver 19 . The sensor connector 21 is fitted into the male connector 20 , and the sensor wire 22 is connected to the sensor connector 21 .

In addition, the resolver rotor 24 and the boss 25 are press-contacted to the rotor 15 for a rotating electric machine with the gasket 23 interposed therebetween.

In the present embodiment, as shown in FIG. 2 , the openings of the connectors 20 and 21 are arranged toward the outside of the motor 1 (the boss 25 side).

A resolver stator portion 26 fixed to the housing 2 is provided on the outer periphery of the resolver rotor 24 , and the sensor wire 22 is fixed with a clamp inside the housing recess 27 .

In FIG. 2 , as shown by the dotted line, the gear 29 fits in the housing recess 27 , and the connectors 20 , 21 and the sensor wire 22 can be accommodated in the space A of the gear side housing.

The sensor wire 22 may also be joined to the resolver 19 by riveting, welding, or the like.

5 is different from the present invention in that it is a side sectional view of an example in which the sensor connector 21 and the sensor wire 22 are arranged inside the motor 1. With such a structure, the inside of the motor 1 needs to have connectors 20, 21 and the sensor wire 22. Therefore, the axial length of the motor 1 becomes longer and the assembly becomes troublesome.

In contrast, the present invention does not need to arrange the connectors 20, 21 and the sensor wires 22 inside the motor 1. By placing the connectors 20, 21 and the sensor wires 22 in the space A of the gear 29 side housing, The overall length of the motor 1 can be shortened.

In the present invention, the connectors 20, 21 can be installed from the outside of the motor 1, so the assembly is easy.

Furthermore, since the sensor wire 22 can be pulled out of the motor 1, it does not short-circuit with the terminals 8, 11, 12 provided inside the motor 1.

In addition, since the jig 28 is installed outside the motor 1 , the jig 28 will not come off and fall inside the motor 1 .

Implementation form 2

Fig. 6 is a front view of a DC brushless motor according to Embodiment 2 of the present invention, and Fig. 7 is a side sectional view.

In the figure, an electronic control unit (ECU) 31 is directly connected to the casing 2 by screws not shown, and the terminals 32 directly arranged on the ECU 31 are connected to the terminals 11 by screws.

In addition, the sensor wire 22 is also directly connected to the ECU 31 .

Embodiment 1 is connected to the ECU 31 through parts such as the motor wire 14 and the connector not shown in the figure, so there is a space for accommodating these parts, and there is also a problem of poor work efficiency.

Therefore, in this embodiment, the work is facilitated by reducing these parts.

Implementation form 3

Fig. 8 is a front view of a DC brushless motor according to Embodiment 3 of the present invention, and Fig. 9 is a side sectional view.

In this embodiment, a part of the housing recess 27 and a part of the mounting surface (indicated by oblique lines in FIG. 8 ) with respect to the gear are provided with a notch, and the motor lead 14 and the sensor lead 22 are separated from each other by using the notch C. The front side of the motor 1 is assembled.

With the above structure, after the motor 1 is assembled, the wiring operation of the motor lead wire 14 and the sensor lead wire 22 can be easily performed by using the notch portion C, so that the work is facilitated.

Possibility of industrial use

As an application example of the present invention, the DC brushless motor having the above-mentioned configuration can be used as an electric power steering motor (EPS).

Compared with hydraulic power steering, which uses oil pressure generated by an oil pump to reduce the steering force, power steering that uses electric power is called electric power steering.

The motor for electric power steering utilizes the battery to rotate the motor, which reduces the steering force only when necessary. As a result, the range of applications can be expanded by applying to electric power steering motors.

In addition, the mounting structure of the resolver described above is not limited to the DC brushless motor, but can be applied to all rotating electric machines.

Claims (4)

1. electric rotating machine, with stator for electric rotating machine be fixed on the chimeric framework of housing on, the rotatable earth's axis of rotor for dynamo-electric machine is supported in the described stator for electric rotating machine, decomposer is set in electric rotating machine, described decomposer has decomposer rotor and decomposer stator, described decomposer is arranged on described decomposer with the periphery of rotor and be fixed on the described housing with stator, it is characterized in that, will be installed in of the outside configuration of the peristome of the connector on the described decomposer towards described electric rotating machine.

2. electric rotating machine as claimed in claim 1, it is characterized in that, a part and gear installed surface that the housing depressed part that gear uses is installed are set on described housing, and on the part of the part of described housing depressed part and described gear installed surface, are provided with barbed portion.

3. electric rotating machine as claimed in claim 1 or 2 is characterized in that, electronic control unit is engaged with described housing.

4. electric rotating machine as claimed in claim 1 or 2 is characterized in that, described electric rotating machine is used as the electric motor driven power steering motor.

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