KR20090028232A - Synchronous generator capable of controlling self-diagnosis and field electric current - Google Patents

Abstract

A synchronous generator can minimizes the influence of the harmonic component generated by the load of the synchronous generator by forming magnet on the main generating part. The main electric generator(20) is comprised of the circuital electronics(23) and generates the electricity. The exciter(30) supplies the field magnet power source to the main electric generator. The controller(50) senses the output voltage outputted in the main electric generator. The sensed output voltage controls the exciter. The current control apparatus(70) transmits the control signal so that the controller control the exciter. A plurality of main magnets(25) is installed at the outer circumference of the circuital electronics in the fixed interval to be separated.

Description

Synchronous generator capable of controlling self-diagnosis and field electric current

1 is a cross-sectional view of a conventional rotorless brushless synchronous self-diagnosis and field current controllable synchronous generator.

2 is a cross-sectional view of a self-diagnosis and field current controllable synchronous generator according to an embodiment of the present invention.

3 is an exploded cross-sectional view of FIG.

4 is a circuit diagram of FIG.

5 is a front view showing the rotor and the stator of the main power generation unit of FIG.

6 is a front view showing the rotor and the stator of the excitation portion of FIG.

7 is a front view showing the rotor and the stator of the auxiliary generating unit of FIG.

<Brief Description of Drawings>

20: main power generation unit 21: sub-sperm

30: excitation part 40: rotation axis

50: control unit 70: current control device

90: auxiliary power generation unit

The present invention relates to a generator capable of controlling self-diagnosis and field current so as to minimize the effects of harmonics generated in the load.

In general, the emergency self-diagnosis and field current-controlled synchronous generators used in various buildings drive the self-diagnosis and field current-controlled synchronous generators using a small gas turbine or an internal combustion engine using fossil fuel as an energy source. It can be seen as a small power plant that supplies the power to a facility that requires power inside the building.

With the spread of computers, various self-diagnostic and field current-controlled synchronous generator-related equipment have been rapidly electronicized, and thus the various facilities require better power supply. However, the power equipment itself consumes power non-linearly, and many harmonic components generated by this are a major cause of disturbance of the power system.

In addition, when using commercial power, the capacity of the synchronous generator capable of self-diagnosis and field current control is so large that the power supplied from the standpoint of the synchronous generator capable of self-diagnosis and field current control is almost linear even if power is consumed nonlinearly in various electronic equipment. Enemy However, the emergency self-diagnosis and field current synchronous generators that are responsible for supplying power to the facilities inside the building in the emergency are self-diagnosis and field-controlled synchronous generators with relatively small capacity self-diagnosis and field current control. In order to supply power smoothly without the need for current controllable synchronous generators, special control devices must be added.

Hereinafter, the problems with the prior art will be described based on the drawings.

FIG. 1 is a diagram illustrating a conventional magnetic field-type brushless brushless synchronous self-diagnosis and field current control synchronous generator.

Referring to FIG. 1, the conventional magnetic field magnetizing brushless synchronous self-diagnosis and field current controllable synchronous generators are largely classified into runner diagnosis and field current controllable synchronous generators and exciters.

It is also divided into a stator and a rotor. In the rotor of the synchronous generator capable of controlling the runner diagnosis and the field current, a synchronous generator field core (3) capable of controlling the runner diagnosis and the field current is formed on the outer circumferential surface of the synchronous generator rotating shaft (15) capable of self diagnosis and the field current control. The synchronous generator field winding (4) capable of controlling the runner diagnosis and the field current is wound around the synchronous generator field core (3) capable of controlling the runner diagnosis and the field current. The stator of the synchronous generator capable of controlling the self-diagnosis and the field current is formed in the stator of the synchronous generator capable of controlling the self-diagnosis and the field current. The generator armature winding 2 is wound.

On the other hand, the exciter is formed on the outer circumferential surface of the rotary shaft 15 of the synchronous generator capable of self-diagnosis and field current control, as opposed to the synchronous generator capable of controlling the self-diagnosis and the field current, and the exciter electric magnetic core 7 is formed. 7) an exciter armature winding 8 is wound. An exciter field magnetic core 5 is formed in the stator, and an exciter field winding 6 is wound around the exciter field magnetic core 5.

Runner diagnosis and field current control Whether the synchronous generator or the exciter can operate DC current through the field windings 4 and 6, the field cores 3 and 5 are electromagnetized by the current flowing through the field windings 4 and 6. . When the armature windings 2 and 8 intersect the magnetic flux in the magnetic field generated by the electromagnet, alternating current is generated in the armature windings 2 and 8. The rotor rectifier is interposed between the exciter armature winding 8 installed on the rotor of the exciter and the synchronous generator field winding controllable to the runner diagnosis and field current control installed in the rotor of the runner diagnosis and field current controllable synchronous generator. (9) is formed, and the alternating current generated in the exciter armature winding (8) is converted into direct current through the rotor rectifier (9) to the synchronous generator field winding (4) capable of controlling the self-diagnosis and the field current. Supplied.

The electricity generated from the synchronous generator armature winding (2) capable of controlling the self-diagnosis and the field current is supplied to the load facility through the synchronous generator output line (13) capable of self-diagnosis and the field current control, while a part of the automatic voltage regulator input line is provided. Branched to the automatic voltage regulator 10 through 14 is introduced. The automatic voltage regulator 10 allows the output voltage of the synchronous generator capable of self-diagnosis and field current control to be maintained at a predetermined constant voltage. The input terminal of the automatic voltage regulator 10 senses the output voltage of the synchronous generator capable of self-diagnosis and the field current control, converts it into an appropriate DC current, and supplies it to the output terminal, and the DC current is supplied to the exciter field winding (6). Is entered.

When the synchronous generator capable of self-diagnosis and field current control is initially operated, no magnetic component or current flows inside the synchronous generator capable of self-diagnosis and field current control, and thus no electricity is generated. At this time, when the electricity of the storage battery 12 is supplied to the excitation field winding (6) through the initial excitation switch 11 connected to the automatic voltage regulator 10, the excitation field magnetic core (5) becomes an electromagnet As a result, electricity is generated in the exciter armature winding 8.

Subsequently, electricity is generated in the synchronous generator armature winding 2 capable of controlling the self-diagnosis and the field current through the above-described process, and when the generated voltage reaches a predetermined voltage, the automatic voltage regulator 10 automatically generates the electricity. The initial excitation switch 11 is cut off. The automatic voltage regulator 10 maintains a constant voltage by detecting a voltage of the synchronous generator armature winding 2 capable of self-diagnosis and field current control by controlling the amount of current fed back to the excitation field winding 6. do.

The automatic voltage regulator 10 increases the output current when the self-diagnosis and field current controllable synchronous generator output voltage drops due to an increase in load, and conversely, when the output voltage of the synchronous generator capable of self-diagnosis and field current controllable increases, the automatic voltage is increased. The regulator 10 reduces the output current to stabilize the voltage of the synchronous generator capable of self-diagnosis and field current control. Here, the automatic voltage regulator 10 senses the synchronous generator voltage capable of self-diagnosis and field current control and adjusts the voltage of the synchronous generator capable of self-diagnosis and field current control and the power of the synchronous generator capable of self-diagnosis and field current control. It receives and converts the DC current to supply the excitation field winding (6).

However, the related art is a voltage sensing function of the automatic voltage regulator 10 when harmonic components are contained in the self-diagnosis and field current controllable synchronous generator output line 13 by a load connected to the self-diagnosis and field current controllable synchronous generator. In addition, since harmonics are contained in the power supplied to the excitation field winding 6, the harmonics are amplified inside the synchronous generator capable of self-diagnosis and field current control, and thus the main self-diagnosis and field current controllability are possible. There is a problem that may affect the synchronous generator output voltage.

The present invention has been made to solve the problems of the prior art, the object of the present invention is to accurately self-diagnose and cope with the effect of harmonics and distortion of voltage generated in the load in a rapid response to minimize the harmonic effect, An object of the present invention is to provide a self-diagnostic and field current controllable synchronous generator capable of stabilizing transient characteristics and providing a stable voltage.

Another object of the present invention is to prevent the sub-coil of the excitation portion to prevent harmonics, and to diagnose and cut off the abnormal transient current of the current supplied from the excitation portion to the main power generation unit to prevent the electrical defects of the main power generation unit in advance to stably develop To provide a synchronous generator capable of controlling the excitation stage and the field current.

The present invention for realizing the object of the present invention and the sperm; A main power generation unit configured to generate electric power by being composed of a main rotor rotated by the subsperm; An excitation unit for supplying field power to the main power generation unit; A synchronous generator capable of sensing the output voltage output from the main generator and controlling the excitation unit based on the sensed output voltage, wherein the control unit controls the excitation unit. A current control device for transmitting a signal; It includes a plurality of main magnets spaced apart at predetermined intervals on the outer circumferential surface of the main rotor.

As described above, the present invention can supply the stable output power to the load by adjusting the field current of the excitation part by using an undistorted signal while minimizing the influence of harmonic components.

Hereinafter, embodiments of the present invention will be described based on the drawings.

2 is a cross-sectional view of a self-diagnostic and field current controllable synchronous generator according to an embodiment of the present invention, FIG. 3 is an exploded cross-sectional view of FIG. 2, and FIG. 4 is a circuit diagram of FIG. 2.

Figure 5 is a front view showing the rotor and stator of the main power generation unit of Figure 2, Figure 6 is a front view showing the rotor and stator of the excitation part of Figure 2, Figure 7 shows the rotor and stator of the auxiliary power generation unit of Figure 2 Front view.

As shown in Figs. 2 to 4, the present invention provides a sperm 21; A main power generation unit 20 configured to generate electricity by the main rotor 23 rotating in the subsperm 21; An excitation unit 30 for supplying field power to the main power generation unit 20; In the synchronous generator capable of detecting the output voltage output from the main power generation unit 20, the control unit 50 for controlling the excitation unit 30 based on the detected output voltage, the field current controllable, A current control device (70) for transmitting a control signal so that the control unit (50) controls the excitation unit (30); It includes a plurality of main magnets 25 are installed on the outer circumferential surface of the main rotor 23 spaced at a predetermined interval.

Here, the main power generation unit 20 and the excitation unit 30 is provided on the rotary shaft 40 to be spaced apart at a predetermined interval.

In this case, when the control unit 50 detects the increase or decrease of the output voltage when the main power generation unit 20 generates power, the control unit 50 controls the excitation unit 30 through the current control device 70. That is, when the output voltage generated by the main power generation unit 20 drops, the field power generated by the excitation unit 30 is provided to the main power generation unit 20 through the current control device 70. Block as much as

In addition, the controller 50 may convert the control signal from a digital signal to an analog signal.

In addition, the controller 50 includes a voltage regulator 51 to automatically adjust the voltage. Here, the voltage regulator may selectively use any one of a voltage regulator (VR) or an automatic voltage regulator (AVR).

As such, the output current generated by the main power generation unit 20 is supplied with the field power generated by the excitation unit 30 being controlled, thereby generating a clean and stable current in which load hunting does not occur.

2 and 5, the plurality of main magnets 25 installed on the outer circumferential surface of the main rotor 23 at predetermined intervals to concentrate the magnetic force of the residual magnetic flux generated in the main power generation unit 20. Potato action can be prevented.

And, the main magnet 25 is preferably arranged symmetrically about the center of the main rotor (23). At this time, it is preferable that the main magnets 25 are installed in four places in one group of three.

The main magnet 25 installed as described above suppresses the occurrence of the potato action of the residual magnetic flux.

As shown in Figures 2 and 6, the excitation portion 30 and the excitation rotor 31 is rotated together by the rotation of the rotary shaft 40; A female stator 33 corresponding to the female rotor 31; A plurality of female magnets 35 installed on the female stator 33; It may be configured to include a sub-coil 37 is installed in the excitation rotor 31 to prevent the introduction of harmonics.

Here, the female magnet 35 may be installed in two to twelve places as one group or a plurality of groups on the inner circumferential surface of the female stator 33.

At this time, since the magnetic force is concentrated by the excitation magnet 35, the residual magnetic flux generated in the excitation portion 30 by the excitation magnet 35 may be increased.

In addition, the main coil 39 is wound inside the excitation rotor 31, and the subcoil 37 is wound outside the excitation rotor 31 separately from the main coil 39. This subcoil 37 can prevent harmonic components introduced from the outside. That is, since the subcoil 37 does not interfere with external harmonics, the influence of harmonics can be further minimized.

As shown in Figures 2 and 4, the current control device 70 is connected to the control unit 50 and the signal transmitting unit 71 for transmitting a control signal generated in the control unit 50; A signal receiver 73 connected to the excitation unit 30 and receiving a control signal transmitted from the signal transmitter 71; A field current controller 75 for controlling the intensity of the field current supplied from the excitation unit 30; A current sensing unit 77 sensing a current controlled by the field current control unit 75; It may be configured to include a current control unit 79 for controlling the field current control unit 75 receives the control signal received from the signal receiving unit 73 and the current value detected by the current sensing unit 77.

Here, the controller 50 may convert the control signal from the digital signal to the analog signal. The converted analog signal is transmitted to the current control unit 79 through the signal transmitter 71 and the signal receiver 73. At this time, according to the magnitude of the signal received by the signal receiver 73, the current control unit 79 finely adjusts the field current is supplied to the main rotor 23, the output voltage is stable without the hunting phenomenon occurs It is supplied to the load side.

The control signal processing unit 75 and the signal receiving unit 73 form a hole 42 inside the rotation shaft 40, and are electrically connected to each other by an electric wire (shield wire) 44 wired to the hole 42. Connected.

The field current controller 75 is controlled by the current controller 79 to finely control the strength of the field current supplied from the excitation unit 30.

In addition, the current detector 77 detects the magnitude of the field current supplied by the field current controller 75 and transmits the sensed current value to the current controller 79 as data.

At this time, the current controller 79 blocks the current to the field current controller 75 when the current sensor 77 detects an abnormal current (overcurrent), thereby protecting the main power generator 20. That is, since the field current control unit 75 may block the field current to protect the generator, the main power generation unit 20 may stably generate power.

The transmitter 71 and the receiver 73 may use a light emitting device and a light receiving device for transmitting and receiving the control signal generated by the controller 50 with light.

Here, the light emitting device and the light receiving device may use a photodiode, which is an optical sensor, may transmit a control signal by using an erection of light, and the frequency emitting device and the frequency receiving device may use a control signal by using a frequency intensity. Can be transmitted.

At this time, when the control signal is transmitted using the transmitter 71 and the receiver 73, since the distortion or noise of the signal generated from the general wire is not generated, it is possible to transmit a clean control signal.

As shown in FIG. 2 and FIG. 7, the auxiliary power generation unit 90 installed on the rotating shaft 40 to generate an operating voltage and providing the generated operating voltage to the control unit 50 is predetermined from the excitation unit 30. It is provided at the end of the rotary shaft 40 spaced apart from each other, and supplies the operating voltage generated by the rotation of the rotary shaft 40 to the controller 50.

In addition, the auxiliary magnet 91 concentrates the magnetic force, thereby causing the residual magnetic flux generated in the auxiliary power generation unit 90 to be demagnetized. In addition, it is preferable that the auxiliary magnets 91 are installed at four locations on the outer circumferential surface of the auxiliary rotor 93 at predetermined intervals.

As such, since the auxiliary power generator 90 generates a voltage by itself and supplies the voltage to the controller 50, the controller 50 may minimize the influence of harmonics.

As such, the present invention minimizes the influence of harmonics, thereby generating stable precision electricity without generating load hunting and waveform distortion.

It is to be understood that the present invention is not limited to the above-described preferred embodiments but may be practiced in various ways without departing from the spirit of the present invention. If you grow up, you can easily understand. If the implementation by such improvement, change, substitution or addition falls within the scope of the appended claims below, the technical spirit is also regarded as belonging to the scope of the present invention.

According to the present invention, a magnet is provided in the main power generation unit to minimize the influence of harmonic components generated by the load of the synchronous generator capable of self-diagnosis and field current control.

In addition, since the present invention transmits a signal for controlling the excitation part using an optical signal or a frequency, there is an effect that the field current of the excitation part can be adjusted using a signal that is not distorted.

In addition, the present invention can prevent the introduction of harmonics by the sub-coil of the excitation unit, and has the advantage that the main power generation unit can stably generate by diagnosing and blocking the abnormal current in the field current supplied from the excitation unit to the main power generation unit.

Claims (3)

The spermatozoa 21; A main power generation unit 20 configured to generate electricity by being composed of a main rotor 23 rotating in the stator 21; An excitation unit 30 for supplying field power to the main power generation unit 20; In the synchronous generator capable of detecting the output voltage output from the main power generation unit 20, the control unit 50 for controlling the excitation unit 30 based on the detected output voltage, the field current controllable, A current control device (70) for transmitting a control signal so that the control unit (50) controls the excitation unit (30); Self-diagnostic and field current controllable synchronous generator comprising a plurality of main magnets (25) which are spaced apart at predetermined intervals on the outer circumferential surface of the main rotor (23). The method of claim 1, wherein the excitation part 30 An excitation rotor 31 which is rotated together by the rotation of the rotation shaft 40; A female stator 33 corresponding to the female rotor 31; A plurality of female magnets 35 installed on the female stator 33; Self-diagnosis and field current controllable synchronous generator, characterized in that it comprises a sub-coil (37) installed in the excitation rotor (31) to prevent the introduction of harmonics. According to claim 1, wherein the current control device 70 A signal transmitter 71 connected to the controller 50 for transmitting a control signal generated from the controller 50; A signal receiver 73 connected to the excitation unit 30 and receiving a control signal transmitted from the signal transmitter 71; A field current controller 75 for controlling the intensity of the field current supplied from the excitation unit 30; A current sensing unit 77 sensing a current controlled by the field current control unit 75; Characterized in that it comprises a current control unit 79 for controlling the field current control unit 75 receives the control signal received from the signal receiving unit 73 and the current value sensed by the current sensing unit 77 Synchronous generator with diagnostic and field current control.

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