KR20210122380A - Non-rotation Type DC Electric Generator - Google Patents

Abstract

The present invention relates to a non-rotating direct current generator which can generate a direct current with high efficiency without rotating a field magnet or an armature. According to the present invention, the non-rotating direct current generator generates a direct current and comprises: a core member of a bar shape; a field magnet allowing an electric line to be wound thereon, having a first hollow space formed in the middle portion thereof, and arranged on the outside of the core member through the first hollow space; and an armature allowing an electric line to be wound thereon, having a second hollow space formed in the middle portion thereof, and arranged on the outside of the core member through the first hollow space. A pole piece is provided between the field magnet and the armature. An insulation plate is arranged between the field magnet and the pole piece and between the armature and the pole piece. The field magnet is driven by a direct-current field current. The field current has a fixed frequency.

Description

Non-rotation Type DC Electric Generator

The present invention relates to a direct current generator, and more particularly, to a non-rotating direct current generator capable of generating direct current with high efficiency without rotating a field or an armature.

An electric generator mainly refers to a device that converts mechanical energy into electrical energy, and is also referred to as a DC generator, a synchronous generator, and an induction generator according to its operation method or operating principle. A generator basically includes an armature for generating and outputting current and a field for generating a magnetic field. The generator generates a current flow in the armature by rotating the armature with respect to the field or rotating the field with respect to the armature while forming a magnetic field by supplying DC power to the field. At this time, the method of rotating the armature is called a rotating armature type, and the method of rotating the field is called a rotating field type. In such a rotary generator, rotational driving of the armature or field is performed by a separate energy source. As the energy source, an appropriate one is employed depending on the intended use thereof, and in general, natural energy such as hydraulic power, wind power, and tidal power, or driving means such as a turbine, an engine, and a motor are used.

In general, direct current has the advantage of being able to easily store electricity, but has a disadvantage in that it is difficult to achieve high power including step-up. On the other hand, alternating current has a very low storability, but has an advantage in that it is easy to increase the voltage and increase the power. As one preferred application of the generator, there is a system configured to generate various alternating current power by rotating a field or an armature using a stored direct current power source such as a battery or another alternating current power source. Such a power system or power conversion system is widely used as an emergency power means in industries requiring high power, such as hospitals or factories. In addition, such a power system may be very usefully employed in an electric vehicle that uses electricity as an energy source and requires generation of various driving torques depending on circumstances.

As another application method of the generator, there is a system for generating direct current power by generating an induced current through rotation of a field or armature and outputting it through a commutator or a commutator element. Such a power system or power conversion system is widely used in a power supply system for devices using DC power, such as automobiles and aircraft, and a battery charging system for charging a battery employed in such devices or facilities.

Conventional generators basically require rotational driving of an armature or a field. These structural features inevitably lead to an increase in the manufacturing cost of the generator along with the structural and mechanical complexity of the generator. In particular, since a large amount of energy loss is generated due to mechanical friction or the like when the armature or field rotates, there is a limit in increasing the power generation efficiency and power conversion efficiency of the generator. Furthermore, in the case of a DC generator, an additional commutator or a commutator element is required to rectify the induced current, and thus the generator has a disadvantage in that it is worse than the AC generator in terms of the structure and weight of the generator.

Korean Patent Registration No. 10-1913746 (Name: AC power generator with adjustable frequency and voltage), Korean Patent Application Laid-Open No. 10-2014-0078732 (Name: Power Conversion Device), Japanese Patent Laid-Open No. 2000-353627 (Name) : Insulation converter transformer and switching power supply circuit), etc., have introduced devices or systems designed to perform power conversion without rotating the armature or field. Here, Patent Registration No. 10-1913746 is particularly noteworthy. In this patent, the frequency and power of the AC power obtained from the armature can be easily adjusted by repeatedly stacking the armature and the field alternately and controlling the pulse width of the DC power supplied to the field.

A main technical object of the present invention is to provide a non-rotating DC generator capable of generating DC power without using a commutator as well as not rotating an armature or a field.

Another technical object of the present invention is to provide a non-rotating DC generator capable of generating DC power with high efficiency.

Another technical object of the present invention is to provide a non-rotating DC generator that can be used as a DC power converter.

A non-rotating DC generator according to the present invention for realizing the above object is a DC generator for generating a DC current, comprising: a rod-shaped core member; A first hollow portion is formed in the central portion as the electric line is wound, and a second hollow portion is formed in the central portion as the electric line is wound and the field disposed on the outside of the core member through the first hollow portion, the first An armature disposed on the outside of the core member through a hollow portion, a pole piece is provided between the field and the armature, and an insulating plate is disposed between the field and the pole piece and between the armature and the pole piece, is driven by a DC field current, and the field current has a constant frequency.

In addition, the central portion of the core member is characterized in that the hollow is provided along the longitudinal direction.

In addition, an insulating material is further disposed between the core member and the first or second hollow part.

In addition, the insulating plate is characterized in that it is composed of a high elasticity material.

In addition, the insulating plate is characterized in that it is composed of PET.

In addition, the core member is characterized in that the heat treatment is performed while being composed of pure iron.

In addition, the pole piece is characterized in that the heat treatment is performed while being composed of pure iron.

In addition, in the heat treatment, the core member or the pole piece is put in a kiln together with the solid fuel, the solid fuel is burned to heat the core member or the pole piece to a certain temperature or higher, and the core member or the pole piece is naturally combined with the burned solid fuel. It is characterized in that it is carried out by cooling.

In addition, the solid fuel is characterized in that the white coal.

In addition, the core member or the pole piece is characterized in that the surface treatment with oil.

In addition, a plurality of the field and the armature are provided, and the field and the armature are alternately arranged.

In addition, it is characterized in that the plurality of armatures are connected in series with each other.

In addition, the plurality of fields is divided into a first field group and a second field group, and the first field group and the second field group are respectively driven synchronously.

In addition, the first or second field group is characterized in that each is connected in series with respect to the field current input.

In addition, the first or second field group is characterized in that each is connected in parallel with respect to the field current input.

According to the present invention having the above configuration, a desired DC current is generated from the armature by stacking and arranging the field and the armature with respect to the core member and appropriately supplying the field current to the field. Accordingly, in the present invention, a mechanical structure for rotationally driving a field or armature is unnecessary, and since the commutator can be removed, the structure of the DC generator is greatly simplified and reduced in weight.

In addition, in the present invention, since the DC generator is configured as a non-rotating type, energy loss due to friction generated during the rotation of the field or armature is minimized. Accordingly, the power generation efficiency of the generator is greatly improved.

The drawings attached to this specification are for efficiently explaining the technical configuration of the present invention. It should be understood that some components in the drawings may be simplified or exaggerated for an efficient understanding of the present invention.
1 is a block diagram showing the configuration of a DC generator according to a first embodiment of the present invention.
2 is a waveform diagram showing an example of the field current supplied to the input terminal 12 of the field 10 in FIG. 1 .
3 is a block diagram showing the configuration of a DC generator according to a second embodiment of the present invention.
FIG. 4 shows input terminals 12-1 of the first and second fields 10-1 and 10-2 in the case of selectively driving the first and second fields 10-1 and 10-2 in FIG. , 12-2) is a waveform diagram showing an example of the field current supplied through.
5 is a front view schematically showing an external shape of a DC generator according to a third embodiment of the present invention;
Fig. 6 is an exploded perspective view of the DC generator shown in Fig. 5;
7 is a graph showing the demagnetization time characteristics according to the cooling time of pure iron.
8 is a graph showing a cooling characteristic curve according to time in the case of heat treatment of the core member 40 and the pole piece 80 in the present invention.
9 is a front view schematically showing an external shape of a DC generator according to a fourth embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the examples described below are illustrative of preferred embodiments of the present invention, and the examples of these embodiments are not intended to limit the scope of the present invention. Those skilled in the art will readily understand that the present invention can be implemented with various modifications without departing from the technical spirit thereof.

First, the basic concept of the present invention will be described. As described above, the basic principle of the generator is to generate a flow of induced current in the armature by changing the magnetic field (magnetic flux) applied to the armature. Here, as a method of changing the magnetic flux to the armature, it is applied to the armature by externally supplying DC power to the magnetic field to generate a magnetic field (magnetic flux), and changing the relative position between the magnetic field and the armature, that is, rotating the magnetic field or the armature. It changes the magnetic field (magnetic flux). This method is a method currently employed in most generators, and as described above, as the magnetic field or the armature is driven to rotate, the structure of the generator becomes complicated and there is a problem in that the power generation efficiency is lowered.

Another way to change the magnetic flux in the armature is to change the field current supplied to the field to change the magnetic field (magnetic flux) itself generated by the field. In this method, if an appropriate method for changing the field current is provided, it is possible to prevent the conventional problems, that is, the complexity of the generator structure and the decrease in efficiency due to rotational driving of the armature or field. In the present invention, this method is referred to as a non-rotating type as a concept relative to the conventional rotating armature type or rotating field type, and a generator using this method is referred to as a non-rotating type generator.

1 is a block diagram showing the configuration of a DC generator according to a first embodiment of the present invention. In the drawing, the DC generator has a field 10 and an armature 20 . The field 10 and the armature 20 are each formed by winding conductive lines 11 and 21 coated with an insulating material. Here, as the conductive line, for example, a polyurethane copper wire, a polyester copper wire, a polyamide imide (PAI) copper wire, a polyester imide copper wire, etc. may be preferably employed. The field 10 is provided with an input terminal 12 for supplying a field current, and the armature 20 is provided with an output terminal 22 for drawing an induced current, that is, a current generated in the armature 20. 10) and the turns ratio of the armature 20 will be appropriately set according to the field power and the output power.

The field 10 and the armature 20 are formed in a cylindrical shape with hollow parts 13 and 23 in the central part as a whole. At this time, the shapes of the field 10 and the armature 20 are not limited to specific ones. For example, the field 10 and the armature 20 may be configured in an elliptical shape or a polygonal shape. The field 10 and the armature 20 are arranged in a vertical direction or a horizontal direction so that the hollow parts 13 and 23 are matched with each other. Preferably, the magnetic field 10 and the armature 20 are disposed in a position that is as close as possible within a range in which leakage current or sparks do not occur between each other. The arrangement positions of the field 10 and the armature 20 are not specified. For example, when the field 10 and the armature 20 are arranged in a vertical direction, the field 10 may be arranged above or below the armature 20 . In addition, when the field 10 and the armature 20 are arranged in the horizontal direction, the field 10 may be arranged on the left or right side of the armature 20 . The field 10 is suitably disposed on one side of the armature 20 .

A field current is supplied to the field 10 through an input terminal 12 . Although not specifically shown in the drawing, a current source such as a battery is coupled to the input terminal 12 to supply the field current, and the duty ratio of the field current supplied through the input terminal 12 is between the current source and the input terminal 12 . Appropriate means for controlling the generator output may be combined. Such means may include a pulse width modulation (PWM) control means and a switching means such as an insulated gate bipolar transistor (IGBT). The supply and control of the field current through the switching means and the PWM control means are described in Korean Patent Registration No. 10-1913746.

2 is a waveform diagram showing an example of the field current supplied to the input terminal 12 of the field 10 . As a method of adjusting the output of the DC generator in FIG. 2, the duty ratio is adjusted as shown in (b) for the basic field current shown in (a), or the frequency is adjusted as shown in (c), or (d) and A method of adjusting the duty ratio and the frequency together may be considered.

When the field current is supplied to the input terminal 12 of the field 10 , the field current flows through the line 11 of the field 10 , and accordingly, the traveling direction of the line corresponds to the winding direction of the line 11 . A magnetic field is formed in a direction perpendicular to the The direction in which the magnetic field is formed can be defined by Ampere's right hand screw rules. The magnetic field generated in the field 10 is linked in a vertical direction with respect to the line 21 of the armature 20 . In addition, current flow is generated in the line 21 of the armature 20 in a predetermined direction corresponding to the direction of the magnetic field and the winding direction of the line 21 . At this time, the magnitude of the induced current will correspond to the strength of the magnetic field and its change amount. And the induced current flowing through the line 21 is output to the outside through the output terminal 22 of the armature (20).

In the above configuration, the desired DC power is output through the armature 20 by arranging the field 10 and the armature 20 in a fixed position adjacent to each other, and appropriately supplying the field current to the field 10 .

3 is a block diagram illustrating a DC generator according to a second embodiment of the present invention. In addition, in FIG. 2, parts substantially the same as those of FIG. 1 are given the same reference numerals, and detailed descriptions thereof are omitted.

In this embodiment, a plurality of fields are provided for one armature 10, and in this example, two fields 10-1 and 10-2 are provided. In this case, the first and second fields 10-1 and 10-2 have substantially the same configuration. The first and second fields 10 - 1 and 10 - 2 are suitably arranged with respect to the armature 20 . Preferably, the first and second fields 10 - 1 and 10 - 2 are disposed adjacent to both sides of the armature 20 , respectively. Also, in another embodiment, the fields 10 - 1 and 10 - 2 may be disposed on one side or the other side of the armature 20 .

In this embodiment, the first and second fields 10-1 and 10-2 are coupled in series or parallel with respect to the field input. In addition, in another preferred embodiment, a field current is selectively or alternately applied to the first and second fields 10-1 and 10-2, so that the first and second fields 10-1 and 10-2 are individually applied. can be driven by 4 shows input terminals 12-1 and 12- of the first and second fields 10-1 and 10-2 when selectively driving the first and second fields 10-1 and 10-2. As an example of the field current supplied through 2), in the drawing, A indicates the field current input through the first input terminal 12-1, and B indicates the field current input through the second input terminal 12-2. In addition, in the present embodiment, each of the field currents A and B may have their duty ratio and frequency appropriately changed as indicated by b to c of FIG. 2 . In addition, in this example, the driving periods of the first field 10 - 1 and the second field 10 - 2 do not necessarily need to be alternately driven, and the driving periods may partially overlap. The driving method of the first field 10-1 and the second field 10-2 is not limited to a specific method.

5 is a front view schematically showing an external shape of a DC generator according to a third embodiment of the present invention, and FIG. 6 is an exploded perspective view thereof. In FIG. 5 , the generator includes a base member 30 and a rod-shaped core member 40 coupled to a central portion of the base member 30 . The outer peripheral surface of the core member 40 has a shape corresponding to the shape of the hollow portions 13 and 23 of the field magnetic field 10-1, 10-2 and the armature 20-1, 20-2, 20-3, and the core The member 40, the fields 10-1, 10-2, and the armatures 20-1, 20-2, 20-3 are configured to be disposed as close as possible to the entirety. And the core member 40 is preferably provided with a hollow 41 in the longitudinal direction. The hollow 41 is to prevent improper accumulation of thermal energy in the core member 41 by allowing air to smoothly flow through the inner side of the core member 41 .

In the core member 40, the fields 10-1 and 10-2 and the armatures 20-1, 20-2, and 20-3 are alternately inserted along the outer peripheral surface thereof to be laminated or combined. In this embodiment, as in FIG. 3 , the first armature 20-11 is disposed inside, that is, in the space between, the first and second field fields 10-1 and 10-2, and in addition to this, the first and second A second armature 20-2 and a third armature 20-3 are disposed outside the second fields 10-1 and 10-2, respectively.

The first to third armatures 20-1 to 20-3 have substantially the same configuration and are coupled in series with each other to act as one armature as a whole. That is, in all of the first to third armatures 20-1 to 20-3, the line 11 is wound in the same direction, and one output end of the first armature 20-1 is connected to the second through the connection line 201 . While being electrically coupled to the other output terminal of the armature 20-2, the other output terminal of the first armature 20-1 is electrically coupled to one output terminal of the third armature 20-3 through the connection line 202. More specifically, the first to third armatures 20-1 to 20-3 are configured and coupled to generate an induced current flow in the same direction for an electric field in the same direction. And the one output terminal 22a of the second armature 20-2 and the other output terminal 22b of the third armature 20-3 constitute an output terminal of the alternator. In addition, field currents are appropriately supplied to the input terminals 12-1 and 12-2 of the first field 10-1 and the second field 10-2 according to the methods described with reference to FIGS.

In a preferred embodiment of the present invention, insulating materials 130 and 230 are coated on the inner peripheral surfaces of the fields 10-1 and 10-2 and the armatures 20-1 to 20-3, respectively. The insulating materials 130 and 230 are formed between the magnetic fields 10-1 and 10-2 and the armatures 20-1 to 20-3 and the core member 40 inserted through the hollow portions 13 and 23 thereof. It is adopted for more reliable insulation.

A magnetic pole piece 80 is provided between the field 10-1. 10-2 and the armature 20-1 to 20-3, respectively. In addition, preferably, the pole pieces 80 are also installed on the uppermost and lowermost sides of the armature or field, that is, the upper side of the second armature 20-2 and the lower side of the third armature 20-3 in this embodiment, respectively. this is provided In addition, an insulating plate 90 is provided between the pole piece 80 and the field 10-1. 10-2 and between the pole piece 80 and the armature 20-1 to 20-3, respectively. At this time, preferably, the cross-sectional shape and size of the pole piece 80 are set to be the same as those of the field (10-1. 10-2) and the armature (20-1 to 20-3). In addition, although not specifically shown in the drawings, the cross-sectional shape and size of the insulating plate 90 are set to be larger than those of the field 10-1. 10-2 and the armature 20-1 to 20-3 for stable insulation.

The material of the insulating plate 90 is not limited to a specific one. In order to most effectively apply the magnetic field generated by the field (10-1. 10-2) to the armature (20-1 to 20-3), the field (10-1. 10-2) and the armature (20-1 to 20) It is necessary to reduce the separation distance of -3) to a minimum or preferably to make them close together. The insulating plate 90 is between the magnetic field 10-1. 10-2 or the armature 20-1 to 20-3 and the pole piece 80, or the field 10-1. 10-2 and the armature 20 It prevents leakage current or sparks between -1 to 20-3) so that the field (10-1. 10-2) and the armature (20-1 to 20-3) can be as close as possible. .

In addition, in a preferred embodiment of the present invention, a material having a high elastic modulus and excellent impact resistance, such as polyethylene terephthalate (PET), is employed as the material of the insulating plate 80 . As will be described later, the core member 40 and the pole piece 80 provide a magnetic path of the magnetic field generated in the field 10-1. 10-2, and in the field 10-1. 10-2 Let the generated magnetic field circulate while linking the armatures 20-1 to 20-3 as a whole. The first field 10-1 and the second field 10-2 are not continuously driven, but are driven or not driven according to the input of the field current. Accordingly, the core member 40 and the magnetic pole piece 80 are repeatedly magnetized and demagnetized in response to the driving of the first and second magnetic fields 10-1 and 10-2. Such magnetization and demagnetization may give an impact to the core member 40 , in particular, the pole piece 80 , thereby causing minute vibration or vibration in the pole piece 80 . When vibration or the like is generated in the core member 40 and the pole piece 80, instantaneous deformation or distortion occurs in the magnetic path circulating through it, resulting in a change in the magnetic field linked to the armatures 20-1 to 20-3. As a result, it may cause an unwanted change in the induced current generated in the armatures 20-1 to 20-3. The insulating plate 80 prevents the flow of alternating current generated through the armatures 20-1 to 20-3 from being unnecessarily distorted by minimizing the vibration or vibration of the pole piece 80 with high elasticity.

As described above, the core member 40 and the pole piece 80 are provided for the smooth flow of the magnetic field generated in the fields 10-1 and 10-2. As a material of the core member 40 and/or the pole piece 80, a ferromagnetic material, preferably silicon steel having high magnetic permeability and low coercive force may be employed. However, silicon steel has relatively low electrical conductivity, and internal resistance is easily increased by light or heat applied from the outside. When a magnetic path is formed through the core member 40 and the magnetic pole 80 , the flow of current may be generated by itself in response to the fluctuation of the magnetic field. At this time, the electrical conductivity of the core member 40 and the magnetic pole 80 . Heat is generated in inverse proportion to That is, there is a problem in that magnetic energy generated in the fields 10-1 and 10-2 is lost as thermal energy.

In another preferred embodiment of the present invention, pure iron, more preferably heat-treated pure iron, is employed as the material of the core member 40 and/or the pole piece 80 . Pure iron has high magnetic permeability and excellent electrical conductivity, but has relatively high coercive force. Since the first and second magnetic fields generated by the first and second magnetic fields 10-1 and 10-2 are alternately applied to the core member 40 and the magnetic pole pieces 80, demagnetization is as fast as possible for the material of the material. It is required to have a firing time, ie, a low coercive force. According to the research conducted by the present inventors, when pure iron is heated to a certain temperature or higher and then cooled slowly, the demagnetization time is shortened in response to the cooling time. 7 is a graph showing the demagnetization time characteristics according to the cooling time of pure iron. As a result of the study, it was confirmed that the demagnetization time could be shortened to 1/450 (sec) or less by gradually cooling the temperature of pure iron heated to a certain temperature or more for a sufficient time for 10 hours or more. In addition, if the cooling time of pure iron is delayed, an additional effect of improving magnetic permeability and electrical conductivity is obtained.

In the present invention, first, the core member 40 and the pole piece 80 are manufactured using pure iron, and then heat treatment is performed. The heat treatment is performed using, for example, a solid fuel such as black coal or white coal, preferably white coal. That is, during the heat treatment, the core member 40 and the pole piece 80 are put in a kiln together with the white coal, and the white coal is burned to heat the core member 40 and the pole piece 80 to 1000 to 1300 degrees or more. And by leaving the core member 40 and the pole piece 80 together at room temperature as it is, the white coal is naturally burned and extinguished, and then the core member 40 and the pole piece 80 are naturally cooled together with the white coal. do. In this way, the temperature of the core member 40 and the pole piece 80 is gradually lowered during the process of burning and extinguishing the white coal, and thereafter, the core member 40 and the pole piece 80 are heated to room temperature by the latent heat of the white coal. It takes a considerable amount of time to cool down. 8 is a graph showing cooling characteristic curves according to time of the core member 40 and the pole piece 80 that are heat-treated through the above-described method. And after the heat treatment is finished, impurities such as white charcoal are removed from the core member 40 and the pole piece 40, and finally, rust prevention treatment is performed with oil or the like.

5 and 6 , when assembling the alternator, the core member 40 is first fastened to the base member 30 . Then, while inserting the pole piece 80 and the insulating plate 90 on the outside of the core member 40, sequentially stacking the armatures 20-1 to 20-3 and the field fields 10-1 and 10-2 alternately, , and then the cover 60 and the fastening member 70 are coupled. And finally, the connection between the first and second fields 10-1 and 10-2 and the first to third armatures 20-1 to 20-3 is executed using the connecting wires 201 and 202, By performing a connection between the generator unit 100 and the drive unit 200, the DC generator is completed.

9 is a front view schematically showing an external shape of a DC generator according to a fourth embodiment of the present invention. In this embodiment, the core member 40 is fastened to the base member 30, and the core member 40 has a plurality of fields (10-1 to 10-n) and a plurality of armatures (20-0 to 20-n). The insulating plate 80 and the pole piece 90 are alternately laminated and bonded. At this time, the armatures 20-0 to 20-n are configured and coupled to generate an induced current in the same direction with respect to the same magnetic field as in FIG. 5 .

In addition, in this embodiment, the fields 10-1 to 10-n are coupled to the field current in the same manner as in FIGS. 2 and 4 . However, when the example of FIG. 4 is applied, n/2 fields among n fields constitute the first field group, and the remaining n/2 fields constitute the second field group. Preferably, the odd-numbered field (10-1. 10-3, ..., 10-(n-1)) constitutes the first field group, and the even-numbered field (10-2. 10-4, ..., 10-n) ) constitutes the second field group. At this time, the configuration of each field group can be performed by appropriately setting the winding direction of the line constituting each field or by appropriately setting the connection method of the field current supplied to these fields. The first and second field groups are driven synchronously, respectively, and the first and second field groups form magnetic fields in the same direction as a whole. Fields constituting the first field group and the second field group may be wired in various ways. Input terminals of the first field group and the second field group may be connected in series with each other, so that the first field group and the second field group may be connected in series with respect to one field current input, respectively. Also, each of the first field group and the second field group may be connected in parallel with respect to one field current input.

In this embodiment, a plurality of fields 10-1 to 10-n and armatures 20-0 to 20-n are provided so that various DC power can be generated as needed. In addition, since other parts are substantially the same as in the above-described embodiment, the same reference numerals are attached to the same parts as in the above-described embodiment, and a detailed description thereof is omitted.

An embodiment according to the present invention has been described above. However, the present invention is not limited to the above embodiment and can be implemented with various modifications. For example, the configuration and coupling structure of the base member 30, the cover 60, and the fastening member 90 employed to configure the alternator in the above embodiment are for explaining one structural example constituting the generator. , the present invention is not limited to these structures and examples. The present invention can provide its technical effects through the configuration and coupling structure of the core member 40 and the magnetic field 10 and the armature 20 coupled thereto, and the structure and configuration employed for their installation are essential It will be readily understood by those skilled in the art that this is not the case.

10: field, 20: armature,
30: a base member, 40: a core member,
60: cover, 70: fastening member,
80: a pole piece, 90: an insulating plate.

Claims (15)

A direct current generator for generating direct current, comprising:
and a rod-shaped core member.
A first hollow portion is formed in the central portion along with the winding of the electric line, and a field disposed on the outside of the core member through the first hollow portion;
A second hollow portion is formed in the central portion along with the winding of the electric line, and an armature disposed on the outside of the core member through the first hollow portion,
A pole piece is provided between the field and the armature,
An insulating plate is disposed between the field and the pole piece and between the armature and the pole piece,
The field is driven by a field current of direct current,
A non-rotating DC generator, characterized in that the field current has a constant frequency. According to claim 1,
A non-rotating DC generator, characterized in that a hollow is provided along the longitudinal direction in the central portion of the core member. According to claim 1,
A non-rotating DC generator, characterized in that an insulating material is further disposed between the core member and the first or second hollow part. According to claim 1,
The insulating plate is a non-rotating DC generator, characterized in that it is composed of a high elasticity material. 5. The method of claim 4,
Non-rotating DC generator, characterized in that the insulating plate is composed of PET. According to claim 1,
The non-rotating DC generator, characterized in that the core member is made of pure iron and subjected to heat treatment. According to claim 1,
The non-rotating DC generator, characterized in that the pole piece is made of pure iron and heat-treated. 8. The method of claim 6 or 7,
In the heat treatment, the core member or the pole piece is put in a kiln together with the solid fuel, the solid fuel is burned to heat the core member or the pole piece to a certain temperature or higher, and the core member or the pole piece is naturally cooled together with the burned solid fuel. A non-rotating DC generator, characterized in that it performs. 9. The method of claim 8,
The solid fuel is a non-rotating DC generator, characterized in that the white coal. According to claim 1,
The non-rotating DC generator, characterized in that the core member or the pole piece is surface-treated with oil. According to claim 1,
A non-rotating DC generator, characterized in that the field and the armature are provided in plurality, and the field and the armature are alternately arranged. 12. The method of claim 11,
A non-rotating DC generator, characterized in that the plurality of armatures are connected in series with each other. 12. The method of claim 11,
The plurality of fields are divided into a first field group and a second field group,
The non-rotating DC generator, characterized in that the first field group and the second field group are driven synchronously, respectively. 14. The method of claim 13,
The first or second field group is a non-rotating DC generator, characterized in that each is connected in series with respect to the field current input. 14. The method of claim 13,
The first or second field group is a non-rotating DC generator, characterized in that each is connected in parallel with respect to the field current input.

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