KR20060098920A - Switched reluctance motor - Google Patents

Abstract

The present invention continuously forms protrusions 11 having the field coil 12 wound around the stator 20 coupled to the inner circumferential surface of the housing 30 at equal intervals, and at the center of the stator 20 at the center of the stator 20. And a reluctance motor having a ring magnet (5) formed on the shaft (3) of the rotor (10), the protrusion (1) corresponding to (11) on the outer circumferential surface thereof, in particular the ring magnet ( 5) is coupled to the electromagnet 15 magnetized by the power supplied intermittently from the control unit.

As described above, the present invention, by magnetizing the electromagnet 15 only at the initial start-up, by placing the rotor 10 in the forward torque generating area to block the generation of back EMF, thereby maximizing the efficiency of the motor have.

Switched reluctance motor, ring magnet, electromagnet, 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 longitudinal cross-sectional view of the present invention shown in FIG.

5A and 5B are views for explaining the operation of the present invention.

<Explanation of symbols for main parts of drawing

1,11: salient pole 3: shaft

5: Ring type magnet 5A, 5B, 15A, 15B: Magnet element

10: Rotor 12: Field coil

15: electromagnet 20: stator

30: Housing

The present invention relates to a switched reluctance motor, and in particular, the electromagnet is coupled to one side of the ring magnet coupled to the upper part of the shaft of the rotor, and the rotor according to the magnetization of the electromagnet only at the initial start of the switched reluctance motor It relates to a switched reluctance motor configured to block the generation of back EMF by positioning the to the forward torque generating area, thereby maximizing the efficiency of the motor.

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 rotor 110 is connected to the outside of the ring magnet 135 through a change in the magnetic field generated between the ring magnet 135 and the rotor 110. Hall sensor 140 for detecting the rotational speed and phase 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, coupled to the electromagnet on one side of the ring-shaped magnet coupled to the upper shaft of the rotor, the above only at the initial start of the switched reluctance motor By magnetizing one electromagnet, the rotor is placed in the forward torque generating region to block the generation of back EMF, thereby providing a switched reluctance motor that can maximize the efficiency of the motor.

Technical problem of the present invention as described above,

Inside the stator coupled to the inner circumferential surface of the housing continuous protrusions at which the field coil is wound are formed at equal intervals, and at the center of the stator, the protrusions corresponding to the protrusions are continuously formed on the outer circumferential surface, and a ring-shaped upper portion of the shaft In a switched reluctance motor with a magnet,

One side of the ring magnet is achieved by providing a switched reluctance motor, characterized in that the electromagnet coupled to the magnetized by the power supplied intermittently from the control unit.

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 perspective view of a fixed ring magnet and a rotating ring magnet constituting the present invention, the switched reluctance motor 50 according to the present invention each component A stator 20 coupled to the inner circumferential surface of the housing 30, the stator 20 continuously formed at equal intervals on the inside thereof, and a central portion of the stator 20. Rotor 10 is rotatably coupled from.

As described above, the housing 30 providing the coupling space of each component is formed in a cylindrical shape, and covers 21 and 22 having bearings 21A and 22A at the center are attached to the upper and lower portions thereof, respectively. As 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 as the operating power is applied to the field coil 12 from a controller (not shown), By magnetizing, drive torque for the rotor 10 is generated.

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 peripheral surface. do.

In addition, a ring magnet 5 having a plurality of magnetic poles 5A, 5B of different polarity alternately arranged in the upper part of the shaft 3 of the rotor 10 by dividing the circumference into two times the above-described salient pole 1 is provided. Coupled to, the one side of the ring-shaped magnet (5) is installed in a state in which the Hall sensor 40 is in close proximity to detect a change in the magnetic field generated in the ring-shaped magnet (5).

In particular, the switched reluctance motor 150 according to the present invention is magnetized by an electromagnet supplied intermittently from the controller in the initial driving process to one side of the ring magnet 5 to apply a repulsive force or suction force to the ring magnet 5. By rotating the electromagnet 15 horizontally to rotate the ring magnet 5 by the magnetic force of the electromagnet 15, the position of the rotor 10 is located in the forward torque generating region from the stator 20 Do it.

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 electromagnet 15 is magnetized by applying power to the electromagnet 15 before power is supplied to the field coil 12 from the controller (not shown) in the initial driving process.

The present invention is, for example, when the magnet element 5A constituting the ring magnet 5 in the state in which the rotor 10 is located in the forward torque generating region is arranged with the polarity of the 'N' pole and the ring magnet 5 and the like. By allowing the polarity of the adjacent electromagnet 15 to be magnetized to the 'S' pole, the rotor 10 is positioned from the stator 20 to the forward torque generating region, and after completion of the above process, the field coil of the stator 20 ( Power is applied to 12 to drive the rotor 10 in the forward direction.

Subsequently, when the driving of the rotor 10 proceeds normally as described above, the electric power applied to the electromagnet 15 is interrupted so that the magnetic force is lost, thereby blocking the counter electromotive force formed between the electromagnet 15 and the ring magnet 5. .

As described above, the switched reluctance motor 50 according to the present invention couples the electromagnet 15 to one side of the ring magnet 5 attached to the upper portion of the shaft 3 of the rotor 10, and at the time of initial startup. Only by magnetizing the electromagnet 15, the rotor 10 is positioned in the forward torque generating region, and in the normal operation state, the back electromotive force between the ring magnet 5 and the electromagnet 15 is cut off to maximize the efficiency of the motor. There are many effects that can be done.

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 (1)

Inside the stator 20 coupled to the inner circumferential surface of the housing 30, continuous protrusions 11 are wound around the stator 20 at equal intervals, and the protrusions 11 are formed at the center of the stator 20. In the switched reluctance motor having a continuous pole (1) formed on the outer circumferential surface, and having a ring-shaped magnet (5) on the shaft (3) of the rotor (10), Switched reluctance motor, characterized in that coupled to the electromagnet (15) magnetized by the power supplied intermittently from the control unit on one side of the ring magnet (5).

Images