KR20060098919A - Switched reluctance motor - Google Patents

Abstract

The present invention continuously forms the protrusion 11 in which the field coil 12 is wound inside the stator 20 coupled to the inner circumferential surface of the housing 30 at equal intervals, and at the center of the protrusion pole of the stator 20 ( A switch reluctance motor in which the rotor 10 corresponding to 11) and the rotor 10, which are formed radially from the outer circumferential surface, are coupled to each other. In particular, the protrusion 1 continuously formed at equal intervals from the outer circumferential surface of the rotor 10 is described. The magnets 2 are respectively attached to one side of the c), and the space between the one poles 1 is filled with the resin material 3.

The present invention, while eliminating the ring-shaped magnet and the parking magnet, there is a lot of effects such as simplification of the structure and maximizing the efficiency by excluding the back EMF.

Switched reluctance motor, ring magnet, parking magnet, counter electromotive force

Description

Switched Reluctance Motors {SWITCHED RELUCTANCE MOTOR}

1 is a plan view of a switched reluctance motor having a conventional structure;

2 is a longitudinal sectional view of the switched reluctance motor shown in FIG. 1;

3 is a plan view showing an embodiment of the present invention;

4 is a front view of a rotor constituting the present invention;

5 is a view for explaining the operation of the present invention.

<Explanation of symbols for main parts of drawing

1,11: pole 2: magnet

3: Resin Material 10: Rotor

12: field coil 20: stator

30: Housing

The present invention relates to a switched reluctance motor, and more particularly, by inserting a magnet into one side of the salient pole of the rotor, and filling the injection material into the space between the salient poles to fix the magnet, thereby eliminating the ring magnet and the parking magnet. The present invention relates to a switched reluctance motor configured to simplify the structure of a la switched reluctance motor and to prevent a decrease in efficiency due to back EMF.

In general, a switched reluctance motor has a structure in which coils are wound only outside the stator poles in a state in which protrusions are formed in the stator and the rotor, respectively.

Therefore, it is possible to remove the magnet from the motor and at the same time, it is unnecessary to wind the coil to the rotor, so it has a simpler structure than the induction motor or the synchronous motor of the conventional structure, and has a high efficiency and smoothly the speed control to include the vacuum cleaner. It is widely used for powering home appliances.

 1 is a plan view of a switched reluctance motor having a conventional structure, Figure 2 is a longitudinal sectional view of the switched reluctance motor shown in Figure 1, such a switched reluctance motor 150 is the inner peripheral surface of the housing 130 A plurality of salient poles 111 are continuously formed at equal intervals inside the stator 120 coupled to the field, and the field magnetizes the salient poles 111 by the power supplied from the controller outside the salient poles 111. The coil 112 is wound, and the rotor 110 is rotatably coupled to the center of the stator 120.

Subsequently, the rotor 110 located at the center of the stator 120 has a protrusion pole 111 and a corresponding pole pole 101 of the stator 120 radially formed from the outer circumferential surface, respectively, and is coupled to the center of the rotor 120. A ring magnet 135 is attached to one side of the outer circumferential surface of the shaft 103, and the outer side of the ring magnet 135 is connected to the rotor through a change in magnetic field generated between the ring magnet 135 and the rotor (135). Hall sensor 140 for detecting the rotational speed and phase of the 110 is provided.

Along with the parking magnet 145 is coupled to one side of the stator 120, the ring magnet 135 is in the process of stopping the rotor 110 inertial rotation as the power applied to the switched reluctance motor 150 is cut off. And the ring magnet 135 is stopped by the repulsive force and the suction force acting by the combination of the and the parking magnet 145, while the rotor 110 is located in the forward torque generating region from the stator 120.

On the other hand, the ring-shaped magnet 135 and the parking magnet 145 is a ring magnet 135 and the parking magnet 145 having a strong magnetic force for accurate setting of the initial drive position by acting through a limited area of suction and repulsive force in need.

Therefore, the conventional switched reluctance motor 150 having the ring magnet 135 and the parking magnet 145 having the above-described structure has a ring magnet 135 and a parking magnet in a normal driving state in which power is continuously supplied from the controller. The back electromotive force is generated by the repulsive force and the suction force acting between the 145, the efficiency of the motor is lowered, and the vibration occurs during the rotation of the rotor 110 by the partially acting repulsive force and the suction force.

The present invention is to solve the conventional problems as described above, the technical problem of the present invention is to attach a magnet on one side of the salient pole of the rotor, and filling the injection into the space between the salient pole to fix the magnet ring and magnet While eliminating the magnet, thereby simplifying the structure of the switched reluctance motor and at the same time to provide a means to prevent the efficiency degradation due to back EMF.

Technical problem of the present invention as described above,

Switched to the center of the rotor coupled to the inner circumferential surface of the housing is formed with a continuous continuous continuous pole at equal intervals, and the rotor continuous radially formed from the outer peripheral surface corresponding to the pole of the stator In the reluctance motor,

It is achieved by providing a switched reluctance motor, characterized in that the magnets are respectively attached to one side of the protrusions continuously formed at equal intervals from the outer circumferential surface of the rotor, and the space between the protrusions is filled with a resin material.

Hereinafter, a switched reluctance motor according to the present invention will be described in detail with reference to the accompanying drawings.

  Figure 3 is a plan view showing an embodiment of the present invention, Figure 4 is a front view of the rotor constituting the present invention, the switched reluctance motor 50 according to the present invention provides a coupling space of each component It is coupled to the housing 30, the inner circumferential surface of the housing 30, the inner side of the stator 20 is continuously formed at equal intervals and the rotatable stator 20 is rotatably coupled from the center of the stator 20 It consists of the rotor 10.

As described above, the housing 30 providing the coupling space of the respective components is formed in a cylindrical shape, and covers 21 and 22 are respectively attached to the center of the upper and lower parts thereof so that the bearings B are coupled to the center. The stator 20 is coupled.

The stator 20 is a continuous pole 11, which is wound around the field coil 12, is formed continuously at equal intervals, and the operating power is applied from the control unit (not shown) to the field coil 12. The magnetic force is generated to generate drive torque for the rotor 10.

Subsequently, the rotor 10 which is coupled to the center of the stator 20 and rotates according to the supply of power is continuously formed with the same number of salient poles 1 as the salient poles 11 of the stator 20 at equal intervals from the outer circumferential surface. do.

In particular, in the switched reluctance motor 150 according to the present invention, the magnets 2 are vertically attached to one side of the salient poles 1 formed on the rotor 10, respectively, between the salient poles 1 by the insert injection method or the like. By filling the resin material 3 into the space of the magnet, the magnet 2 attached to the protrusion 1 is fixed, and the rotational resistance caused by friction with air is suppressed during the rotation of the rotor 10.

As described above, each magnet 2 coupled through the salient pole 1 performs a function similar to a ring magnet in a switched reluctance motor having a conventional structure by causing an alternating polarity to be directed toward the magnet of an adjacent salient pole. At the same time, try to achieve self-equilibrium.

In this case, the magnets 2 are radially attached to form the same angle as the salient poles 11 of the stator 20, and the magnets 2 are in close proximity to the salient poles 11 of the stator 20. 11) Minimize size and magnetic force because magnetic attraction force acts.

On the other hand, the rotor by attaching a hall sensor 40 to one side of the stator 20 to detect a change in the magnetic field generated between the magnet 2 attached to the salient pole 1 of the rotor 10 as described above (10) It is possible to detect the rotational speed and phase.

The operation of the present invention having the configuration as described above will be described below with reference to FIG.

The switched reluctance motor 50 according to the present invention, for example, is built in a household appliance such as a household vacuum cleaner to start the operation by the power supplied from the control unit to drive the household appliance.

In the present invention as described above, the power supplied to the field coil 12 from the control unit of the rotor 10 is cut off. Accordingly, when the rotation of the rotor 10 is stopped due to the loss of the driving torque, the suction force of the magnets 2 attached to the salient poles 1 of the rotor 10 acts through the salient poles 11 of the stator 20. do.

That is, the driving torque acting on the rotor 10 is lost, while the magnetic force of the magnetic 2 attached to the salient pole 1 in the process of gradually decreasing the rotational force by continuing the rotation of the rotor 10 by inertia. Since the stator 20 acts through the salient pole 11, the rotor 10 stops at the position where the magnetic force of the magnetic 2 of the salient pole 1 acts most strongly.

At this time, as described above, in the position where the magnetic pole 2 of the salient pole 1 and the salient pole 11 of the stator 20 are close to each other, the rotor 10 is located in the forward torque generation region from the stator 20. When power is applied to the field coil 12 of FIG. 20, the rotor 10 may be driven in a forward direction.

As described above, in the switched reluctance motor 50 according to the present invention, the magnet 2 is attached to one side of the salient pole 1 of the rotor 10, and the resin material 3 is formed in the space between the salient poles 2. ) By the injection to fix the magnet 2 to eliminate the ring-shaped magnet and the parking magnet, thereby simplifying the structure of the switched reluctance motor 50.

In particular, the switched reluctance motor 50 according to the present invention minimizes the magnetic force generated from the magnet 2, while excluding the generation of suction force acting between magnets of different polarities to minimize the counter electromotive force to maximize the efficiency There are many effects such as that.

While the invention has been shown and described with respect to certain preferred embodiments, the invention is not limited to the embodiments described above, it is common in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Anyone with knowledge will be able to make various variations.

Claims (3)

On the inside of the stator 20 coupled to the inner circumferential surface of the housing 30, a protrusion 11 in which the field coil 12 is wound on the outside is continuously formed at equal intervals, and a protrusion corresponding to the protrusion of the stator 20. In the switched reluctance motor which combined the rotor 10 which radially continued (1) from the outer peripheral surface to the center part, The magnets 2 are attached to one side of the salient poles 1 continuously formed at equal intervals from the outer circumferential surface of the rotor 10, and the space between the salient poles 1 is filled with a resin material 3. Switched reluctance motor. The switched reluctance motor according to claim 1, wherein the rotor (10) is arranged with magnets (2) attached to one side of the salient poles (1) at opposite polarities with respect to the magnets of adjacent salient poles. The switched reluctance motor according to claim 1 or 2, wherein the magnet (2) is attached to one side of the salient pole (1) of the rotor (10) to form the same angle as the salient pole (11) of the stator (20). .

Images