KR100703176B1 - Switched reluctance motor - Google Patents

Abstract

According to the present invention, by installing a commutator piece, a slip ring and a brush on the rotor to continuously control the current applied to the coil of the stator, it is possible to eliminate a control device such as a semiconductor current switching device and an inverter in a switched reluctance motor. It is possible to drastically reduce the manufacturing cost, and to switch the reluctance motor without high speed control as well as high speed driving by the direct switching by the current switching by the contact of the commutator and the brush. A stator having a plurality of wound protrusions protruding from the inner wall toward the center of the circle; A rotor positioned inside the stator, the shaft hole being formed in the center thereof, and having a plurality of iron cores projecting around the shaft hole and matching the protrusions of the stator; And a rotation ring inserted into the shaft hole of the rotor and having a slip ring, a plurality of commutator pieces, and a plurality of brushes respectively disposed on one side thereof, wherein the brush is connected to a coil of the stator to continuously switch power applied to the coil of the stator. It consists of;

Description

Switched Reluctance Motors {SWITCHED RELUCTANCE MOTOR}

1 is a perspective view showing a switched reluctance motor according to the present invention.

2 is an exploded perspective view illustrating a structure of the rotor of FIG. 1 according to an embodiment of the present invention.

FIG. 3 is a circuit diagram electrically showing the switched reluctance motor of FIG. 1. FIG.

* Explanation of symbols for the main parts of the drawings

10: stator 11: salient pole

15: coil 20: stator

21: Iron core 25: Axis

30: rotating shaft 40: slip ring

50: commutator part 59: dummy commutator part

60: brush

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switched reluctance motor, and more particularly, to a switched reluctance motor for converting current supplied to a coil of a stator, not a rotor, by using a brush, a commutator piece, and a slip ring installed on a shaft to obtain continuous torque. will be.

In general, the switching of the supply current using the commutator has been used in a conventional DC motor or a universal motor. In general, the current supply to the coil of the rotor is switched through the commutator to obtain a continuous torque.

The advantage of the switched reluctance motor that is commonly used is that the rotor structure is simple and inexpensive. However, in order to drive the reluctance motor, there is a problem of using an inverter composed of a semiconductor switch, which increases the price of the entire system. In addition, there was a disadvantage that a higher speed control circuit should be applied in order to perform proper control during high speed driving.

Therefore, an object of the present invention, the rectifier used in the existing DC motor and the universal motor is a device that can switch the current flowing through the coil of the rotor, but in the present invention by installing a commutator, slip ring and brush in the rotor It is to provide a switched reluctance motor capable of switching the current flowing through the commutator, not the coil of the electron.

Another object of the present invention is to remove the semiconductor current switching device and its control device in a switched reluctance motor by continuously installing a commutator piece, a slip ring and a brush on the rotor to continuously control the current applied to the coil of the stator. The present invention provides a switched reluctance motor that can be directly driven by switching current by contact between a commutator and a brush and does not require speed control.

Technical means of the present invention for achieving the above object, the stator pole winding coils of each phase is formed in the inner wall a plurality of stators protruding in the direction of the center of the circle; A rotor positioned inside the stator, the shaft hole being formed in the center thereof, and having a plurality of iron cores projecting around the shaft hole and matching the protrusions of the stator; And a rotation ring inserted into the shaft hole of the rotor and having a slip ring, a plurality of commutator pieces, and a plurality of brushes respectively disposed on one side thereof, wherein the brush is connected to a coil of the stator to continuously switch power applied to the coil of the stator. It characterized by including.

Specifically, the coil of the stator is characterized in that one side is connected to the power supply and the other side is connected to the brush, the brush connected to the coil is installed in contact with the commutator piece.

The brush directly connected to one end of the power source is characterized in that the contact is installed in contact with the slip ring.

In addition, by installing a commutator piece that is not connected to the slip ring adjacent to the commutator piece connected to the brush is characterized in that configured to mitigate the impact during the current switching.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing a switched reluctance motor according to the present invention, Figure 2 is an exploded perspective view showing the structure of the rotor of Figure 1, the stator 10, the rotor 20 and the rotating shaft 30, etc. Consists of

The stator 10 is formed with a plurality of protrusions 11 protruded from the inner wall in the direction of the center of the circle in which the coils 15 are wound, and the rotor 20 is located inside the stator 10 but at the center thereof. A shaft hole 25 is formed and a plurality of iron cores 21 matching the protrusion 11 of the stator 10 protrudes around the shaft hole 25, and the rotating shaft 30 has the rotor 20. Inserted into the shaft hole 25 of the) and the slip ring 40, a plurality of commutator pieces 50 and a plurality of brushes 60 are disposed on one side, respectively, the brush 60 is the coil 15 of the stator 10 ) Is configured to continuously switch the power applied to the coil 15 of the stator 10.

That is, the rotation shaft 30 is inserted into the shaft hole 25 of the rotor 20 and the slip ring 40 and the plurality of commutator pieces 50 and the plurality of brushes 60 are disposed on one side, respectively, and the The plurality of brushes 60 installed to abut against the commutator piece 50 are connected to the coils 15 of the stator 10, respectively, and the brushes 60 connected to one side of the power supply come into contact with the slip ring 40. It is formed to continuously switch the power supplied to the coil 15 of the stator 10.

In addition, one side of the coil 15 of the stator 10 is connected to the power supply and the other side is electrically connected to the brush 60, the coil 15-1, 15-2, 15-3 is connected Brushes 60-1, 60-2, 60-3 are provided in contact with each commutator piece 50-1, 50-2, 50-3.

On the other hand, the brush 60-4 directly connected to one end of the power source is installed in contact with the slip ring 40.

In addition, it is preferable to install the commutator pieces 59 which are not connected to the slip ring 40 adjacent to the commutator piece 50 connected to the brush 60 so as to mitigate an impact during current switching.

The switched reluctance motor constructed as described above uses a commutator and a brush used in a conventional DC motor to remove the semiconductor switch of the switched reluctance motor using a commutator 50, a slip ring 40, and a brush 60. As the invention related to the structure of the current switching device, the semiconductor switch for current switching has been removed to maximize the low cost, which is the advantage of the switched reluctance motor, and the direct-input can be started to maximize the practical use. There is a feature that can replace the field of use.

FIG. 3 is a circuit diagram electrically showing the switched reluctance motor of FIG. 1. Referring to FIG. 2, FIG.

First, one end of the first coil 15-1, which is an A-phase coil, is connected to one end of the power supply, and the other end of the first coil 15-1 is connected to the first brush 60-1. The first brush 60-1 is provided in contact with the first commutator piece 50-1.

One end of the second coil 15-2, which is a B-phase coil, is connected to one end of the power supply, and the other end of the second coil 15-2 is connected to the second brush 60-2. The second brush 60-2 is provided in contact with the second commutator piece 50-2.

One end of the third coil 15-3, which is a C-phase coil, is connected to one end of the power supply, and the other end of the third coil 15-3 is connected to the third brush 60-3. The third brush 60-3 is provided in contact with the third commutator piece 50-3.

The other end of the power source is directly connected to the fourth brush 60-4 installed in contact with the slip ring 40.

The first to third brushes 60-1 to 60-3 are provided in contact with each of the commutator pieces 50-1 to 50-3 at 120 ° intervals, respectively, and the fourth brush 60-4. The contact is installed at the lower end of the slip ring 40 located between the second and third brushes 60-2, 60-3.

That is, a slip ring 40, a commutator piece 50, and a brush 60 are disposed on an outer circumferential surface of one side of the rotation shaft 30, and one end of the coil 15 is connected to one electrode of a power source and the coil The other end of 15 is connected to the brush 60 in contact with the commutator piece 50, and the other electrode of the power source is connected to the brush 60-4 in contact with the slip ring 40.

The brush 60 connected to the coil 15 of each phase is in contact with the commutator piece 50, and the brush 60 connected to the power source is in contact with the slip ring 40, thereby providing reluctance when the rotor 20 is rotated. It has a shape that can cause a difference.

Several specific commutator pieces 50-1 to 50-3 of the commutator pieces 50 are directly connected to the slip ring 40 such that a current supplied through the slip ring 40 is specific to the coil 15 of each phase. It is arranged to be energized in the position to generate a continuous torque in one rotation, but the commutator piece 59 not connected to the slip ring 40 is inserted to reduce the impact when switching the current with the brush (60) It is a dummy device that does not play an electrical role.

The current control structure of the switched reluctance motor configured in this way is suitable for high-speed operation because there is no controller price increase of the switching inverter due to the high speed, and it is possible to directly start the commercial power supply, thus basically replacing the universal motor and single phase induction machine for cleaner. The market is very bright because it is simple in structure and can replace most of the wide application fields of the existing DC motor.

Therefore, in the present invention, the commutator used in the existing DC motor and the universal motor is a device for switching the current flowing through the coil of the rotor, but in the present invention, the commutator and slip ring and brush are installed on the rotor to install the coil of the rotor. Rather, there is an advantage of switching the current flowing through the stator coils through the commutator.

In addition, by installing a commutator piece, a slip ring and a brush on the rotor to continuously control the current applied to the coil of the stator, it is possible to eliminate a control device such as a semiconductor current switching device and an inverter in a switched reluctance motor. The cost can be significantly reduced, and the direct current can be started by switching the current by the contact of the commutator and the brush, so that high speed driving is possible and speed control is not necessary.

Claims (5)

A stator in which a plurality of protrusions wound by coils of each phase protrude in the center direction of the circle from the inner wall; A rotor positioned inside the stator, the shaft hole being formed in the center thereof, and having a plurality of iron cores projecting around the shaft hole and matching the protrusions of the stator; And A rotating shaft inserted into the shaft hole of the rotor and having a slip ring, a plurality of commutator pieces, and a plurality of brushes disposed on one side thereof, the brush being connected to a coil of the stator to continuously switch power applied to the coil of the stator; Switched reluctance motor comprising a. The method according to claim 1, The stator coil is switched reluctance motor, characterized in that one side is connected to the power supply and the other side is connected to the brush. The method according to claim 2, Switched reluctance motor, characterized in that the brush connected to the coil is installed in contact with the commutator piece. The method according to claim 1, Switched reluctance motor, characterized in that the brush is directly connected to one end of the power supply is in contact with the slip ring. The method according to claim 1, Switched reluctance motor, characterized in that configured to mitigate the impact at the time of switching current by installing a commutator piece adjacent to the commutator piece connected to the brush not connected to the slip ring.

Images