KR101623048B1

KR101623048B1 - Permanent magnet generator capable of voltage compensation

Info

Publication number: KR101623048B1
Application number: KR1020150187184A
Authority: KR
Inventors: 조종현; 이선휴
Original assignee: (주)썬테크
Priority date: 2015-12-28
Filing date: 2015-12-28
Publication date: 2016-05-20

Abstract

A permanent magnet generator capable of voltage compensation is disclosed.
The permanent magnet generator may include a rotor rotated by a rotating shaft, a stator generating an electromotive force by rotation of the rotor, and driving means for moving the rotor such that the electromotive force is varied.

Description

[0001] DESCRIPTION [0002] PERMANENT MAGNET GENERATOR CAPABLE OF VOLTAGE COMPENSATION [0003]

The present invention relates to a permanent magnet generator capable of voltage compensation.

A generator is a device that generates electromotive force by electromagnetic induction and converts mechanical energy into electrical energy.

Such a generator may consist of a cylindrical stator and a rotor rotatably received in the hollow of the stator. In general, a stator is used to wind a coil around a core and obtain an electromotive force through magnetic induction.

However, in the case of the conventional generator, if a variation occurs in the external load applied to the generator, a separate configuration such as a voltage compensator is required to match the voltage of the generator in accordance with the changed external load.

Accordingly, there is a demand for a generator capable of automatically compensating for a voltage in accordance with the variation of an external load.

Patent Registration No. 10-0678492 (Registered on February 29, 2007)

Embodiments of the present invention are intended to provide a permanent magnet generator capable of compensating for a voltage in accordance with variations in an external load.

A permanent magnet generator capable of voltage compensation according to an aspect of the present invention includes: a rotor rotated by a rotating shaft; A stator generating an electromotive force by rotation of the rotor; And driving means for moving the rotor so as to vary the electromotive force.

The rotor may include a first rotor positioned within an electromotive force range capable of generating the electromotive force; A second rotor selectively positioned within the electromotive force range; And a guide bar in which at least one end is disposed within the electromotive force range and the first rotor is fixed at one end and the second rotor is movably mounted in the longitudinal direction at the other end.

The driving means may include a moving piece movably mounted in a longitudinal direction of the rotating shaft; A rotating piece rotatably mounted on the moving piece and to which the rotor is connected; And an actuator for moving the moving piece in the longitudinal direction of the rotating shaft.

A sensor for measuring the electromotive force generated in the stator; And a controller for applying an operation signal to the driving unit to move the rotor so that the measurement value of the electromotive force measured by the detection sensor satisfies a predetermined set range.

The stator may have a length corresponding to the length of the rotor plus the lengths of the first rotor and the second rotor.

The embodiments of the present invention can automatically compensate the voltage in accordance with the variation of the external load so that there is no need for a separate voltage compensator configuration and thus the product cost can be reduced and the advantage of being able to actively cope with fluctuating external loads have.

1 is a longitudinal sectional view showing a permanent magnet generator capable of voltage compensation according to an embodiment of the present invention.
2 is a state diagram illustrating an operating state of a permanent magnet generator capable of voltage compensation according to an embodiment of the present invention.
3 is a block diagram showing a control configuration of a permanent magnet generator capable of voltage compensation according to an embodiment of the present invention.
4 is a longitudinal sectional view showing a permanent magnet generator capable of voltage compensation according to another embodiment of the present invention.
5 is a state diagram illustrating an operation state of a permanent magnet generator capable of voltage compensation according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, configurations and operations according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. DETAILED DESCRIPTION OF THE INVENTION The following description is one of many aspects of the claimed invention and the following description may form part of the detailed description of the invention. However, the detailed description of known configurations or functions in describing the present invention may be omitted for clarity.

While the invention is susceptible to various modifications and its various embodiments, it is intended to illustrate the specific embodiments and the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

And terms including ordinals such as first, second, etc. may be used to describe various elements, but the constituent elements are not limited by such terms. These terms are used only to distinguish one component from another. It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

FIG. 1 is a longitudinal sectional view illustrating a permanent magnet generator capable of voltage compensation according to an embodiment of the present invention. FIG. 2 is a state diagram illustrating an operating state of a permanent magnet generator capable of voltage compensation according to an embodiment of the present invention. And FIG. 3 is a block diagram showing a control configuration of a permanent magnet generator capable of voltage compensation according to an embodiment of the present invention.

1 to 3, a permanent magnet generator according to an embodiment of the present invention includes a rotor 110, a stator 120, a driving unit 200, a sensing sensor 300, and a controller 400 ).

In this embodiment, the permanent magnet generator is used in place of the field winding (main rotor) of the main power generating device that generates electricity, but the present invention is not limited thereto, and the permanent magnet generator may be a main power generator, And may be used as an exciter to supply excitation power to the field windings of the apparatus.

Specifically, the rotor 110 is a rotor capable of generating excitation through electromagnetic induction with the stator 120, and includes a rotating shaft 10 rotatably installed in the case 20 via a rotating bearing 11, As shown in FIG.

The rotor 110 includes a first rotor 111 fixed to the rotary shaft 10 so as to be positioned within an electromotive force range, a second rotor 112 selectively positioned within an electromotive force range, And a guide bar 113 to which the second rotor 112 is slidably mounted via the linear bush 211 at the other end. Here, the electromotive force range can be defined as an effective range of power generation in which stator electricity can be generated in the stator 120 through electromagnetic induction with the rotor 110.

The first rotor 111 and the second rotor 112 may be composed of a core and a permanent magnet disposed on the outer diameter side of the core and having a constant magnetic flux within a predetermined range. The first rotor 111 and the second rotor 112 may be variously configured to induce electromotive force with the stator 120 to generate electromotive force. For example, the first rotor 111 and the second rotor 112 may be composed of only permanent magnets.

At least one end of the guide bar 113 may be disposed within the electromotive force range and the other end may be disposed outside the electromotive force range. Accordingly, when the second rotor 112 is moved to one end of the guide bar 113, the first rotor 111 and the second rotor 112 are all located within the electromotive force range of the stator 120 The stator 120 can generate electromagnetism through electromagnetic induction with the first and second rotors 111 and 112 while the second rotor 112 is rotated by the guide bar 113, Since only the first rotor 111 is located within the range of the electromotive force of the stator 120, the stator 120 generates excitation electricity through electromagnetic induction with the first rotor 111 .

The stator 120 may be fixed within the case 20 so as to face the outer diameter side of the rotor 110 to generate induced electricity by magnetic induction with the rotor 110 located within the electromotive force range.

In this embodiment, the stator 120 may be constituted by a cylindrical core in which a plurality of slots are formed on the inner diameter side and a winding wound on each slot, but in addition to these configurations, And may be changed into various forms capable of generating electromotive force through electromagnetic induction. The stator 120 may have a length corresponding to the length of the first rotor 111 and the length of the second rotor 112. However, And a voltage required for voltage compensation according to variation of the voltage.

The driving means 200 can selectively vary the electromotive force of the stator 120 by selectively moving the rotor 110 to the electromotive force range of the stator 120. [ To this end, the driving means 200 includes a moving piece 220 mounted movably in the longitudinal direction of the rotating shaft 10, a rotating piece 210 rotatably mounted on the moving piece 220, 220) in the longitudinal direction of the rotary shaft (10).

The moving piece 220 has an inner diameter corresponding to the outer diameter of the rotating shaft 10 so as to be movable in the longitudinal direction of the rotating shaft 10 and includes a moving bar 233 supported by the supporting bush 234, 232 to the driving bar 231 of the actuator 230 of the driving means 200. The rotating piece 210 can be rotatably mounted to the moving piece 220 through an inner ring 222 and a driving bearing 221. [

The guide bar 113 can be mounted on the rotary piece 210 so as to be movable in the longitudinal direction of the rotary shaft 10 via the linear bush 211. One end of the rotating piece 210 may be rotatably mounted on the moving piece 220 and the rotor 110 may be fixed to the other end of the rotating piece 210.

2, when the driving bar 231 of the actuator 230 is moved in the direction in which the first rotor 111 is located (left side in the drawing), in conjunction with the movement of the driving bar 231, The second rotor 112 is positioned within the range of the electromotive force of the stator 120 as the rotating piece 210 is moved along the guide bar 113 in the direction in which the first rotor 111 is located .

The sensing sensor 300 is a sensor for measuring an electromotive force (voltage) generated in the stator 120 and can apply information on electromotive force (voltage) of the measured stator 120 to the controller 400 in real time .

The controller 400 may apply an actuating signal for moving the rotor 110 to the actuator 230 of the driving means 200 to move the rotor 110. [ In particular, the controller 400 receives the information about the electromotive force (voltage) of the stator 120 from the sensor 300, compares the set range of the predetermined electromotive force, The actuator 230 of the driving means 200 can be operated with an operation signal to satisfy the set range of the predetermined electromotive force.

For example, when the electromotive force (voltage) measured by the sensing sensor 300 is lower than the preset range of the electromotive force, the controller 400 positions the second rotor 112 within the electromotive force range of the stator 120 Can be applied to the actuator (230) of the driving means (200). When the electromotive force (voltage) measured by the sensing sensor 300 is higher than the preset range of the electromotive force, the controller 400 performs an operation for positioning the second rotor 112 outside the electromotive force range of the stator 120 A signal can be applied to the actuator 230 of the driving means 200.

FIG. 4 is a longitudinal sectional view showing a permanent magnet generator capable of voltage compensation according to another embodiment of the present invention, FIG. 5 is a state diagram showing an operating state of a permanent magnet generator capable of voltage compensation according to another embodiment of the present invention to be.

4 to 5, according to another embodiment of the present invention, the rotor 110 'includes one rotor 111' movably mounted along the longitudinal direction of the rotating shaft 10, And a guide bar (113).

The rotor 110 'can vary the induced electromotive force generated in the stator 120 according to the overlapping range between the rotor 110' and the stator 120 where the electromotive force of the stator 120 is within the applicable range .

4, when the electromotive force (voltage) of the stator 120 is higher than the preset range of the electromotive force, in order to reduce the overlapping range between the rotor 110 'and the stator 120, the rotor 110 Can be moved out of the electromotive force range.

5, when the electromotive force (voltage) of the stator 120 is lower than the preset range of the electromotive force, in order to increase the overlapping range between the rotor 110 'and the stator 120, the rotor 110 ') Can be moved within the EMF range.

Hereinafter, the operation of the present invention will be described.

When the external load of 30KW is applied to the generator of the capacity of 100KW and the second rotor 112 is kept outside the electromotive force range, the stator 120 induces the external load An appropriate electromotive force can be generated.

Thereafter, when the external load is changed from 30 KW to 50 KW in a generator of 100 KW capacity, it is necessary to compensate the voltage for the increased external load.

The sensing sensor 300 may measure the electromotive force generated by the stator 120 and then apply information about the measured electromotive force (voltage) of the stator 120 to the controller 400. The controller 400 may measure the electromotive force May apply an actuating signal to the actuator 230 of the driving means 200 to position the second rotor 112 within the electromotive force range of the stator 120. When the second rotor 112 is moved within the electromotive force range, the stator 120 can induce electromagnetic induction with the first rotor 111 and the second rotor 112 to generate a voltage corresponding to the changed external load have.

On the other hand, when the external load is changed from 50 KW to 30 KW in the generator of 100 KW capacity, the detection sensor 300 can measure the electromotive force generated in the stator 120 and apply it to the controller 400, An actuating signal for positioning the second rotor 112 outside the electromotive force range of the stator 120 can be applied to the actuator 230 of the driving means 200. [ When the second rotor 112 is located outside the electromotive force range, the stator 120 can generate electromotive force suitable for an external load through magnetic induction between the first rotors 111. [

As described above, according to the present invention, since the voltage can be automatically compensated in accordance with the variation of the external load, a separate voltage compensator configuration is unnecessary, which can reduce the product cost and actively cope with the fluctuating external load And the like.

It is to be understood that the embodiments described above are merely illustrative of some examples of the technical idea and the scope of the technical idea is not limited to the described embodiments, It will be understood that various changes, substitutions, and alterations may be made therein without departing from the spirit and scope of the invention.

10: rotating shaft 20: case
110: Rotor 111: 1st rotor
112: second rotor 113: guide bar
120: stator 200: driving means
210: rotating piece 220: moving piece
230: Actuator 300: Detection sensor
400: controller

Claims

A rotor rotated by a rotating shaft;
A stator generating an electromotive force by rotation of the rotor;
Driving means for moving the rotor so as to vary the electromotive force;
A sensor for measuring the electromotive force generated in the stator; And
And a controller for applying to the driving means an operation signal for moving the rotor so that the measurement value of the electromotive force measured by the detection sensor satisfies a predetermined setting range,
The rotor
A first rotor positioned within an electromotive force range capable of generating the electromotive force;
A second rotor selectively positioned within the electromotive force range; And
Wherein at least one end of the guide bar is disposed within the electromotive force range and the first rotor is fixed at one end and the second rotor is mounted movably in the longitudinal direction at the other end.
The controller
When the electromotive force measured by the detection sensor is lower than the preset range of the electromotive force in order to compensate the voltage of the generator in accordance with the fluctuating external load when the external load fluctuates, When an electromotive force measured by the detection sensor is higher than a preset range of electromotive force, an operation signal for positioning the second rotor outside the electromotive force range of the stator, Is applied to the drive means.

delete

The method according to claim 1,
The driving means
A moving piece movably mounted in the longitudinal direction of the rotating shaft;
A rotating piece rotatably mounted on the moving piece and to which the rotor is connected; And
And an actuator for moving the moving piece in the longitudinal direction of the rotating shaft.

delete

The method according to claim 1,
The stator
The permanent magnets being capable of voltage compensation having a length corresponding to a length of the rotor plus the lengths of the first rotor and the second rotor.