KR20020062516A - Resonance type magnet motor - Google Patents

Abstract

PURPOSE: A permanent magnet motor is provided to rotate a rotor by a certain angle in reciprocation and generate large amount of torque during rotation. CONSTITUTION: A permanent magnet motor comprises a stator(10), a rotor(20) inside the stator(10), and a rotating shaft(30) inside the rotor(20). The stator(10) includes a stator core(12), a pair of stator teeth(15), and coils(16) wound at the stator teeth(15). The stator teeth(15) are formed at a front and a rear reciprocative rotation areas(14,14') except for non-rotating area(13,13') at both of inner sides of the stator core(12). The coils(16) magnetizes the stator teeth(15). The rotor(20) includes a rotor core(22), and rotor teeth(23) protruded at the front and the rear positions of the rotor core(22). The rotor teeth(23) performs reciprocative rotation between the reciprocative rotation areas(14,14') depending on alternative magnetization of the stator teeth(15). The rotor teeth(23) are coupled to magnets(40), respectively, for generating large amount of torque when the rotor(20) rotates.

Description

Rotary reciprocating permanent magnet motor {RESONANCE TYPE MAGNET MOTOR}

The present invention relates to a rotary reciprocating permanent magnet motor, and more particularly to a rotary reciprocating permanent magnet motor suitable for allowing the rotor to reciprocate at an angle and to increase torque of the reciprocating rotor.

A general magnetoresistive motor generates a torque by interrupting the power supplied to a coil wound around a multi-phase stator by using a switching element. The magnetizing force is changed by sequentially changing the exciting state between the rotor and the stator. Forward rotation torque can be generated, and when the specific excitation state is not changed, the rotor can be stopped at a certain position, and the reverse rotational power is increased by controlling the phase of the input pulse signal applied to the switching element based on the maximum inductance shape. As various driving controls that can be generated are possible, they are applied to electronic products requiring direction control.

An example of such a magnetoresistive motor is briefly described with reference to FIG. 1, and a rotor 2 is rotatably inserted into a cylindrical stator 1, and a rotation shaft is an output shaft at the center of the rotor 2. (3) is press-fit and fixed, and position detection means for detecting the position of the rotor 2, and a control unit for controlling in accordance with the detected position are provided.

In addition, the stator 1 has six stator side teeth (TEETH) 1a protruding at a predetermined angle (60 ° interval) inside the body portion, and each of the stator side teeth 1a has a coil 4 ) Is wound to form a fixed magnetic pole, and the fixed magnetic poles are configured to form three phases (La, Lb, and Lc) in which the same polarity is generated by electrically connecting the fixed magnetic poles in diagonal directions with each other.

In addition, the rotor 2 has four rotor side teeth 2a protruding at a predetermined angle (90 °) on an outer circumferential surface thereof, and rotates to form an air gap with an end of the stator side teeth 1a. have.

The conventional magnetoresistive motor having the above-described structure detects the position of the rotor side teeth 2a by the position detecting means and outputs the position detecting pulse to synchronize the position detecting pulse with three phases (La, Lb, Lc). Applying a current to the exciting coil 4 generates an electromagnetic force.

Then, when the current is applied to the La phase to excite and generate electromagnetic force, the current is applied to the Lb to excite and the rotor side teeth 2a of the rotor 2 are anticlockwise to minimize the magnetic resistance. The rotating torque is generated to rotate, and thus, each phase La, Lb, and Lc is sequentially excited to generate a driving force for the rotor 2 to rotate.

Further, as described above, the rotor 2 is rotated at high speed in one direction or rotated at high speed in the reverse direction through phase control to use the rotational force as a power source of the mechanical device.

However, the conventional magnetoresistive motor as described above is capable of high-speed rotation in one direction or in the reverse direction, but cannot be reciprocated in a certain angle during rotation, and thus cannot be applied to a mechanism or device requiring such a high-speed reciprocation. Even if applied, there was a problem that a separate converter must be provided to change the rotational movement into a linear movement.

The object of the present invention devised in view of the above problems is to provide a reciprocating magnetoresistive motor suitable for causing the rotor to reciprocate within a certain angle and to generate a large torque during rotation.

1 is a cross-sectional view showing the structure of a conventional magnetoresistive motor.

Figure 2 is an exploded perspective view showing the structure of the present invention a rotary reciprocating permanent magnet motor.

Figure 3 is a longitudinal sectional view showing the structure of the present invention a rotary reciprocating permanent magnet motor.

4 is a cross-sectional view taken along the line AA ′ of FIG. 4.

5 is a circuit diagram showing an electrical connection state of the present invention.

Figures 6a, 6b, 6c is a cross-sectional view showing the operation of the present invention.

Explanation of symbols on the main parts of the drawings

10: stator 12: stator side core

14,14 ': Reciprocating rotation area 15: Fixed long side teeth

16: coil 20: rotor

22: rotor side core 23: rotor side teeth

40: magnet

In the magnetoresistive motor in which the rotor is rotatably disposed inside the stator in order to achieve the object of the present invention as described above, the stator has a pair of stator side teeth coiled around the inner circumferential surface of the front and rear of the stator core. The rotors are respectively formed in front and rear of the rotor side cores so that the rotors can be reciprocated at a predetermined angle in the reciprocating rotation area between the stator teeth by alternately exciting the stator teeth. And, there is provided a rotary reciprocating permanent magnet motor, characterized in that the magnet is installed to increase the rotation torque on the rotor side teeth.

Hereinafter, the present invention will be described in more detail with reference to an embodiment of the accompanying drawings, the rotary reciprocating permanent magnet motor configured as described above.

Figure 2 is an exploded perspective view showing the structure of the rotary reciprocating permanent magnet motor of the present invention, Figure 3 is a longitudinal cross-sectional view showing the structure of the rotary reciprocating permanent magnet motor of the present invention, cut out A-A 'of FIG. As shown in the cross-sectional view, as shown in the present invention, the rotary reciprocating permanent magnet motor has a rotor 20 rotatably inserted inside the stator 10, and an output shaft is formed at the center of the rotor 20. The rotating shaft 30 to be pressed is fixed.

The stator 10 has lamination sheets stacked to form a stator side core 12, and the front and rear reciprocations except for the non-rotating regions 13 and 13 'on both sides of the stator core 12 are formed. A pair of stator teeth 15 are formed in the rotation regions 14 and 14 ', respectively, and a coil for exciting the stator teeth 15 by applying an electric current to the stator teeth 15 is provided. (16) is wound up, respectively.

The rotor 20 is laminated with lamination sheets to form rotor-side cores 22, and the rotor-side teeth are formed so as to protrude on the front and rear sides (180 ° positions) of the rotor-side cores 22. 23 is formed to protrude, so that the teeth 15 of the stator are alternately excited to reciprocate the reciprocating rotational regions 14 and 14 '.

In addition, a magnet 40 is coupled to the rotor teeth 23 of the rotor 20 so that a large torque is generated when the rotor rotates by the magnetic force formed on the stator-side teeth 15, respectively.

The magnet 40 is formed by magnetizing the end of the rotor-side tooth 23, or by attaching a permanent magnet to the end of the rotor-side tooth 23, the other pole (N pole or S pole on the outside in the opposite direction to each other) ) Is formed.

Meanwhile, as shown in FIG. 5, the coils 16 wound on the stator-side teeth 15 are all connected in series, and when the power is input, the “ga” or “b” section of the sine wave curve is provided. As the polarity of the voltage is changed, the polarity excited to each phase La, Lb, -La, and -Lb of the stator-side tooth 15 is repeatedly changed.

In the rotary reciprocating permanent magnet motor of the present invention configured as described above, voltage is applied to all the coils 16 connected in series when power is applied to the coils 16 wound on the stator side teeth 15. Each stator tooth 15 is excited at the same time. In the sine wave curve of the power frequency, different magnetic poles are generated in the coil 16 wound around the stator tooth 15 in the "ga" section and the "b" section. In addition, different magnetic poles are formed on the stator side teeth 15 in the diagonal direction depending on the winding direction of the coil 16.

When the stator side teeth 15 are excited as described above, the rotor side teeth 23 of the rotor 20 rotate in a direction in which the magnetoresistance becomes "0", wherein the rotor side teeth ( A large torque is instantaneously formed by the magnet 40 coupled to the end of 23.

That is, when the voltage flows toward the + side as in the "ga" section, the magnetic poles of the excitation part formed in the stator-side teeth 15 are La (N), Lb (S), -La (S), and -Lb (N). When the rotor 20 rotates at a predetermined angle in the counterclockwise direction as shown in FIG. 6A, and when the flow toward the − side, voltage is applied to the opposite side, and the polarity is changed, the magnetic pole of the excitation part formed on the stator tooth 15 is La ( S), Lb (N), -La (N), -Lb (S), and the rotor 20 rotates clockwise at an angle as shown in FIG. 6C, and is synchronized with the applied power frequency. The rotor 20 of the motor is reciprocally rotated at a predetermined angle in the pre-reciprocal rotation region 14 (14 ') formed inside the stator 10.

As described in detail above, in the present invention, the rotary reciprocating permanent magnet type motor is rotatably inserted into the stator, the rotating shaft is fixed to the center of the stator, and the front and rear surfaces of the stator are respectively. A pair of stator teeth are formed and coils are wound. The rotor teeth are formed on the front and rear sides of the rotor, and magnets are coupled to the ends, respectively, so that power is supplied to coils electrically connected in series. When inputted, the stator teeth are excited and synchronized with the change in the polarity of the voltage, thereby causing the rotor to reciprocate at a certain angle. During this reciprocating rotation, a large torque is generated by a magnet coupled to the rotor teeth.

Claims (3)

In the magnetoresistive motor in which the rotor is rotatably disposed inside the stator, the stator has a pair of stator teeth wound around the inner and outer circumferential surfaces of the stator core, and the rotor has a stator side tooth. Rotor teeth are protruded from the front and rear of the rotor side core so that they can be reciprocated at a predetermined angle in the reciprocating rotation area between the stator side teeth by being alternately excited, and rotation torque is applied to the rotor side teeth. Rotational reciprocating permanent magnet motor, characterized in that the magnet is installed to increase the configuration. The rotary reciprocating permanent magnet motor according to claim 1, wherein the magnet is formed by magnetizing a portion of an end of the rotor side tooth. The rotating reciprocating permanent magnet motor according to claim 1, wherein the magnet is formed by attaching a permanent magnet having magnetic poles to the teeth of the rotor.