JPH09247911A - Switched reluctance motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen a ripple and extract large torque by connecting n-pieces of modules through a rotary shaft, with a single-phase 2-2 topology SR motor being one module, and forming salient poles in stators or rotors, with the salient poles in one stator or rotor being shifted from those in another stator or rotor. SOLUTION: Both a first module and a second module are single-phase 2-2 topology SR motors. They are connected through one and the same rotary shaft 10 to constitute a pair of SR motors. The first and the second module have stators, each of which has two salient poles 1, 2 or 11, 12. The salient poles of the stator which constitutes the first module and the salient poles of the stator which constitutes the second module are formed, being shifted by 90 deg., in yoke sections 7, 8 and 17, 18. By this method, the modules can rotate contiiuuously through the rotary shaft and thereby large torque can be taken out and a torque ripple can be reduced.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an HA device, FA
The present invention relates to a compact and lightweight switched reluctance motor (hereinafter referred to as SR motor), which is expected to be applied as a device, an OA device, an automobile electrical component, and the like.

[0002]

2. Description of the Related Art An SR motor is a kind of induction synchronous motor composed of a stator composed of a plurality of salient poles formed by stacking laminated iron plates and a rotor composed of a plurality of salient poles of the same structure. Taking an SR motor having a 3-phase 6-4 topology as an example, it has a 6-pole stator and a 4-pole rotor, and its schematic structure is as shown in FIG. 7. In FIG. 7, when a pair of salient poles 101 and 102 constituting the I-th phase are excited at the same time, a pair of salient poles 107 of the rotor
And 108 are magnetized. Next, when a pair of salient poles composed of the stators 103 and 104 constituting the phase II are simultaneously excited and the excitation of the phase I is turned off, the pair of salient poles 109 and 110 of the rotor are magnetized. So the rotor 111
Rotates in the direction of the arrow. Further, with respect to the phase III as well, the rotation can be continued by performing similar control.

[0003]

As is clear from the above description, the pair of rotor salient poles 107 and 10 in FIG.
When magnetizing 8, another pair of salient poles 109 and 11
0 is not magnetized. Further, when 109 and 110 are magnetized, 107 and 108 are not magnetized, so that the utilization factor of the component of the motor that generates torque is low, and
Ripple occurs in the torque that can be taken out. If the number of phases and the number of poles are increased to make an SR motor of, for example, a 4-phase 8-6 topology, the ripple of torque becomes smaller, but the shape of the stator and the motor becomes complicated, and the utilization rate of the constituent elements of the motor is improved. I can't expect. The present invention has been made in order to solve the above-mentioned drawbacks of the conventional SR motor, and a plurality of single phase 2-
By combining two topology SR motors with the same rotating shaft, it is possible to extract large torque with less ripples.
It is intended to realize an R motor.

[0004]

In the SR motor according to the present invention, a single-phase 2-2 topology SR motor is used as one module, and n modules are coupled through respective rotary shafts and respective stators or rotors are connected. The salient pole positions are sequentially shifted by 180 [deg.] / N, and the coupled rotating shafts continue to rotate.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view for explaining the structure of an SR motor showing a first embodiment according to the present invention. In FIG. 1, both the first module and the second module are single-phase 2-2 topology SR motors, and are coupled via the same rotary shaft 10 to form one set of SR motors. For convenience of explanation, the two SR motors are shown in a separated state, but in reality, they are closely coupled to each other via a short rotation shaft. The first module and the second module both have a stator consisting of two salient poles 1 and 2 and 11 and 12, respectively, with exciting coils 3 and 4 and 13 and 14 wound on each salient pole. There is. Also, a pair of salient poles 5 and 6 and 15 and 1 respectively
The rotor composed of 6 is fixed to the common rotating shaft 10 at the same salient pole position, and the salient poles of the stator forming the first module and the salient poles of the stator forming the second module are 90 °. The yoke portions 7 and 8 and 17 and 18 are arranged at the shifted positions. The cross section of the SR motor in the AA cross section and the BB cross section in FIG. 1 is as shown in FIG.

FIG. 2 shows S of the second embodiment according to the present invention.
It is a perspective view which shows the structure of an R motor. In FIG. 2, the salient pole positions of the stator of the first module and the second module of the SR motor having the single-phase 2-2 topology are the same, and the salient poles of the rotor fixed to the same rotary shaft 10 are the same. The positions are shifted by 90 °, and the sectional views of the SR motor in the CC section and the DD section in FIG. 2 are as shown in FIG.

When a single-phase 2-2 topology SR motor is used as one module, the rotation torque range alone is narrow and it does not function as a motor, but the utilization rate of each salient pole is high and the torque that can be taken out is large. . Therefore, if the above-mentioned SR motor of the single-phase 2-2 topology is regarded as one module, and a plurality of modules are sequentially coupled via their respective rotary shafts and the salient pole positions of the respective stators or rotors are appropriately shifted and arranged, It will be continuously rotated through the coupled rotating shaft. By arranging n modules so that their phase angles are shifted by 180 ° / n, not only can a large torque proportional to the number of modules be taken out, but also torque ripple can be reduced, so noise and vibration are also reduced. Has the effect of

FIG. 5 shows two single-phase 2-2 topologies for SR.
6 is a characteristic curve showing the relationship between torque and phase angle when two motors are coupled. 90 from the first module
The second module rotates with the first module at phase angles that are offset. The torque is positive in the clockwise direction, and switches the excitation of the first module and the second module in the portion indicated by the arrow. FIG. 6 shows an example in which three modules are connected to form three phases, the phase difference between the modules is 60 °, and the excitation is switched between the modules at the arrow portion. As can be seen from FIG. 6, the ripple of the combined torque is significantly improved as compared with the case of FIG. Therefore, n single-phase 2-
It can be seen that when SR motors of two topologies are coupled on the same rotating shaft, n times the torque of a single module is obtained and the torque ripple is also improved.

[0009]

As is apparent from the above description, in the SR motor according to the present invention, a single-phase 2-2 topology SR motor is used as one module, and the rotating shafts of n modules are coupled to each other, and the respective stators or The salient pole position of the rotor is shifted by 180 ° / n to enable continuous rotation. Therefore, not only n times the torque of a single module can be taken out, but also the torque ripple is reduced, and noise and vibration are also reduced. Therefore, the number of modules to be coupled can be selected so as to correspond to the required torque, and a rectangular motor can be formed, so that the mounting space can be effectively used.

[Brief description of drawings]

FIG. 1 is a perspective view showing the configuration of an SR motor according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing the configuration of an SR motor according to a second embodiment of the present invention.

FIG. 3 is a sectional view.

FIG. 4 is a sectional view.

FIG. 5 is a characteristic curve showing the relationship between torque and phase angle.

FIG. 6 is a characteristic curve showing the relationship between torque and phase angle.

FIG. 7 is a sectional view showing the structure of a conventional SR motor.

[Explanation of symbols]

 1,2,11,12 Stator salient poles 3,4,13,14 Stator excitation coil 5,6,15,16 Rotor salient poles 10 Rotating shafts 7,8,17,18 Yoke part

Claims (2)

[Claims] 1. A switched switch comprising: a stator having two salient poles formed by laminating laminated iron plates; and a rotor having two salient poles that rotate an inner peripheral surface of the salient poles of the stator through a gap. -The reluctance motor is defined as one module, and a plurality of the modules are connected in a straight line through the rotary shafts of the respective modules, and further, the salient pole position of the stator in each module or the projection of the rotor fixed to the rotary shaft. The pole positions are sequentially shifted, and the excitation of the stator is sequentially turned on / off while detecting the rotor position, whereby the salient poles of the rotor are rotated corresponding to the excited stator, and are integrally coupled. A switched reluctance motor, wherein the rotary shaft is continuously rotated. 2. The n switched reluctance motors are connected on the same axis, and the salient pole position of the stator or rotor in each module is 180 °.
The switched reluctance motor according to claim 1, wherein the switched reluctance motors are arranged so as to be sequentially shifted with a phase angle of / n.