JP2002262531A - Dc power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a DC power generator which has been enhanced in conversion coefficient from mechanical power energy to electric energy. SOLUTION: This DC power generator comprises an aluminum fixing frame 15 to form a casing for supporting a rotor shaft, a magnetic pole rotor 7 in which a magnetic pole 14 is disposed in the rotating direction of a rotor shaft 8 and a plurality of type-C stators 18 disposed in the internal circumference of the fixing frame 15. The type-C stator 18 is provided, at front and a rear sides of the rotating direction of the rotor shaft 8, with a front-side core 16a and a rear-side core 16b, and a full-wave rectifying circuit is connected at both ends of a winding of the stator coil 17 wound to the cores 16a, 16b. The total number X of magnetic poles 14 and the total number Y of the cores 16a, 16b are set to a relationship to provide a value of X/Y as an integer. Moreover, the magnetic poles 14 are disposed at intervals almost corresponding to the pitch width of both cores of the type-C stator 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC generator.

[0002]

2. Description of the Related Art An electromotive force of a DC or AC generator is an induced electromotive force generated by a relative action between an armature and a field pole.
This induced electromotive force generates an armature current. An armature reaction occurs due to the armature current, and in the case of an alternating current, a magnetic field is generated between a 90-degree electrical angle advance and a 90-degree electrical angle delay centering on a power factor of 1 (cross-magnetization effect). For example, if AC power is converted to DC power by an AC generator / regulator and the alternator generator for voltage regulation is operated at the rated rotation speed (synchronous speed) and a symmetrical three-phase load is connected, the armature winding will have a symmetrical three-phase load. Phase current flows. At the same time that the three-phase armature current is generated, the rotating magnetic field generated by the armature reaction rotates at a synchronous speed with a certain phase difference (delay) with respect to the field main magnetic flux generated by the magnetic poles. As a result, an electromagnetic torque (brake) is generated in the magnetic pole in a direction opposite to the rotation direction. This negative torque becomes a mechanical power load (requires input energy) transmitted from the magnetic flux rotor to the prime mover through the rotor shaft. For example, Japanese Unexamined Patent Publication
Although the stator core in the generator described in Japanese Patent No. 146125 is all formed in an internal gear ring shape,
In the case of such a stator core, the field main magnetic flux flows in the circumferential direction of the stator core, and a rotating magnetic field is generated in the rotation direction of the magnetic pole rotor due to the armature reaction. However, the rotating magnetic field is a minus magnetic field that rotates at a speed that maintains a constant delay (depending on the power factor) from the rotating peripheral speed of the rotor, and applies an electromagnetic braking action to the magnetic pole rotor to apply a mechanical power load.

[0003]

The above-mentioned generator has no mechanical means for eliminating a rotating magnetic field having only a minus magnetic field. Therefore, the mechanical power load caused by the armature reaction is effectively reduced or eliminated. The conversion efficiency from mechanical power energy to electric energy was only 70 to 90%. But,
If the mechanical power load generated by the armature reaction based on the armature current (load current) can be reduced or eliminated, the conversion efficiency from mechanical power energy to electric energy can be increased. The present invention pays attention to such a point, and provides a DC generator that generates a positive magnetic field (positive rotation torque) by using a phase difference due to a magnetic field delay to increase the conversion efficiency from mechanical power energy to electric energy. Is the subject.

[0004]

In order to solve the above-mentioned problems, the invention according to the first aspect of the present invention provides a magnetic pole rotor in which N-poles and S-poles of magnetic poles are alternately arranged in a rotation direction of a rotor shaft. A plurality of C-shaped stators each comprising a stator coil wound around a substantially C-shaped groove-shaped stator block having a core portion before and after the rotor shaft in the rotation direction, and winding ends of each stator coil. A full-wave rectifier circuit, the magnetic poles are arranged at intervals substantially corresponding to the pitch width of both core portions of the C-shaped stator, and the plurality of C-shaped stators are magnetically insulated from each other. I do.

[0005] The invention described in the second aspect of the invention is the first aspect of the invention.
In addition to the above configuration, the total number X of the magnetic poles and the total number Y of the core portions of the C-shaped stator are set so that the value of X / Y does not become an integer.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the present invention will be described below in detail with reference to the drawings. Left and right end frames 3, which constitute the casing 2 of the DC generator 1,
A bearing portion 5, 6 is formed on 4, and a rundle-shaped magnetic pole rotor 7 is supported by the bearing portions 5, 6. A winding frame 9 (9 a, 9 b) is fitted around the outer periphery of the rotor shaft 8 of the magnetic pole rotor 7, and an exciting coil 10 is wound around the winding frame 9. The winding ends 10 of the exciting coil 10
a and 10b are connected to a pair of slip rings 11a and 11b fitted to one end of the rotor shaft 8. The springs 12a, 12b are provided on the slip rings 11a, 11b.
The brushes 13a and 13b which project by the urging force of b are in sliding contact.

The winding frame 9 fitted to the rotor shaft 8 has an S pole core 14a and an N pole core 14b of a magnetic pole 14 made of metal in which magnetic flux easily flows on the left and right sides in the axial direction.
The magnetic pole rotor 7 having the field poles arranged in a gear shape is formed alternately at equal angular intervals with the tips of the cores facing inward in the axial direction. A cylindrical fixed frame 15 is disposed between the left and right end frames 3 and 4 to form a casing, and a C-shaped stator 18 is disposed on the inner periphery of the fixed frame 15 at substantially equal angular intervals. . C
The stator 18 includes a stator block 16 having a substantially C-shaped grooved core formed by laminating silicon steel plates having a front core portion 16a and a rear core portion 16b in the front and rear direction of the rotor, and a front side of the stator block 16. Core part 16a
And the stator coil 17 wound around the rear core portion 16b, and the iron core widths W ₁ and W ₂ of the front core portion 16a and the rear core portion 16b in the rotor rotation direction are formed to be smaller than the stator core pitch Ps. Have been. In the C-shaped stator 18, the front core portion 16a and the rear core portion 16b are disposed with a small gap around the outer circumferences of the S pole core 14a and the N pole core 14b. The magnetic poles 14 are arranged such that the pole core pitch Pp, which is a half of the cycle pitch Pr, is substantially the same as the stator core pitch Ps between the front core portion 16a and the rear core portion 16b.

[0008] The stator coil 17 includes a rear core portion 16b.
Are wound clockwise as viewed from the magnetic pole 14 side of the magnetic pole rotor 7. The right-hand wound stator coil 17 is wound around the front core portion 16 a in a right-hand extension toward the magnetic pole 14 of the magnetic pole rotor 7.

The fixed frame 15 is made of aluminum, which is a non-magnetic material, so that the stator blocks 16 are magnetically insulated from each other, an independent armature current is generated for each stator block 16, and a magnetic field is generated. Acts independently. In order to create a total balance effect, the relationship between the total number X of the S-pole cores 14a and the N-pole cores 14b and the total number Y of the core portions 16a and 16b of the C-shaped stator 18 is represented by the value of X / Y. Is not an integer. Here, it is assumed that X = 16 and Y = 14.

As shown in FIG. 3, each stator block 1
7 are connected to input terminals of a full-wave rectifier circuit 19 composed of four diodes. The output terminal of the full-wave rectifier circuit 19 is connected to a load circuit 21 having a smoothing capacitor 20 interposed in parallel.
Also, as shown in FIG. 1, the excitation DC power supply line 22 is connected to the plus side terminal of the DC power supply control device 25 from the brush 13a via the positive connection wire 23 and the open / close switch 24, and to the negative connection from the brush 13b. Each is connected to a negative terminal via an electric wire 26.

Next, the operation of the DC generator will be described. The on / off switch 24 of the exciting DC power supply line 22 is closed, and a predetermined DC power is applied to the exciting coil 10 by adjusting automatically or manually by the DC power controller 25, and the magnetic pole rotor 7 is rotated by external mechanical power. Let it. Since the exciting coil 10 is wound right-handed, the S-pole core 14a has an S-pole and the N-pole core 14b has an N-pole based on the right-hand rule. The field main magnetic flux φ generated by the S pole and the N pole is generated in the direction shown in FIG. As the magnetic pole rotor 7 rotates, the pole cores 14a and 14b alternate between N poles and S poles with respect to the front core portion 16a and the rear core portion 16b of the C-shaped stator 18.
Therefore, the flow direction of the field main magnetic flux φ is
6 alternately moves in the circumferential direction (the front-back direction with respect to the roll rotation direction) between the front core portion 16a and the rear core portion 16b.

Then, the S-pole core 14a and the N-pole core 14b rotate and the magnetic field lines of the field main magnetic flux φ change in the increasing direction with respect to the front core portion 16a and the rear core portion 16b of the stator block 16. In addition, if the magnetic field lines of the different pole cores in the front (to the rotor rotation direction, the same applies hereinafter) that act in parallel at the same time change in a decreasing direction in inverse proportion, both poles are determined based on Faraday's law of electromagnetic induction and Lenz's law. Due to the mutual induction effect of the composite, a positive and negative alternating (alternating current) electromotive force of the total effect is generated in the stator coil 17.

That is, the S-pole core 14a, the N-pole core 14b, and the front core 16 of the stator block 16
a, the S-pole core 14a and the N-pole core 14b further move from the position where the phase of the magnetic field lines stops due to the phase coincidence with the rear core portion 16b and the generation of the positive or negative electromotive force peaks, The magnetic lines of force change in the decreasing direction with respect to the front core portion 16a and the rear core portion 16b, and the magnetic lines of force formed by the rear pole cores at the rear enter simultaneously,
In the case of a change in the increasing direction in inverse proportion, the mutual induction action by the bipolar combination causes the stator coil 17 to pass from plus (peak) through 0 to minus (peak) or from minus (peak) through 0 to become positive. (Peak) alternately in a cycle, and an induced electromotive force is generated. Thus, the S pole core 14a and the N pole core 14b
When each of these alternately passes through each of the core portions 16a and 16b, an independent induced AC electromotive force is induced in the stator coil 17 to generate an AC current. The induced AC electromotive force is rectified by a full-wave rectifier circuit 19 provided for each C-shaped stator 18, and flows into the load circuit 21 as DC power.

FIG. 4 is a waveform diagram of an original magnetic flux showing a waveform of a magnetic field flux having a counter-electromotive force when the delay phase at the time of generation of the magnetic field is set to 0 (origin) with respect to the waveform of the field main magnetic flux φ. It is. When an induced AC electromotive force is induced in the stator coil 17 by the mutual induction action and an AC current is generated, a magnetic field is generated by the armature reaction. In the magnetic field, a magnetic field magnetic force is generated in a direction opposite to the direction of flow of the field main magnetic flux φ in the forward and reverse alternating directions due to the back magnetomotive force. The DC power rectified independently by the full-wave rectifier circuit 19 for each of the stator blocks 16 is supplied to the load circuit 21 so that the delay of the magnetic field generated by the armature reaction and the back magnetomotive force due to the AC current is reduced. Is fixed to a constant lag phase α at a power factor of 1 (electrical crossing effect) with a phase delay of 90 degrees electrical angle from the field main magnetic flux φ. FIG. 5 is an operating magnetic flux waveform diagram showing a magnetic field magnetic flux waveform delayed by an electrical angle of 90 degrees (magnetic field delay) from the field main magnetic flux φ and a waveform of the field main magnetic flux φ.

When the delay of the magnetic field is equal to the power factor of 1 (cross-magnetization effect) and the phase is constant (lag phase α), an alternating current (a positive current and a negative current alternately flow) is generated in the stator coil 17, The magnetic flux generated by the armature reaction at the front core portion 16a and the rear core portion 16b of the stator block 16, and the N pole core 14b of the magnetic pole 14,
Between the field main magnetic flux φ generated by the S pole core 14a,
A repulsive magnetic force acting as a repulsive action is generated, and conversely, a combined magnetic force (attracting magnetic force) acting as an attracting action is generated. These two magnetic forces are divided into a plus rotation torque (motor action) acting in the rotation direction of the magnetic pole rotor 7 and a minus torque (brake action) acting in the opposite direction.

Here, one of the C-shaped stators 18 is taken up, and the positional relationship between the S-pole core 14a and the N-pole core 14b with respect to the front core portion 16a and the rear core portion 16b of the C-shaped stator 18 is illustrated. 6, when the magnetic field has a constant delay phase α corresponding to a power factor of 1 (cross-magnetization effect), the S pole core 14a and the N pole core 14b of the magnetic pole rotor 7 are connected to the front core of the C-shaped stator 18. Every time the stator core 17 alternately passes through the cores of the portion 16a and the rear core portion 16b, an induced AC electromotive force is induced in the stator coil 17 to generate an AC current. Due to the generated alternating current, delayed magnetic fields of N pole and S pole are generated alternately in the core portions 16a and 16b. The front pole part 16a and the rear core part 16 of the S pole core 14a and the N pole core 14
When rotational movement relative to b, N-pole magnetic field delay phase α over the entire width of the core width W ₁ is generated in the front core portion 16a,
S pole magnetic field delay phase α over the entire width of the core width W ₂ is generated on the rear core portion 16b at the same time. S pole core 14
a and the N pole core 14b move in the rotor rotation direction and the poles are reversed, the front core 16a and the rear core 1
The two magnetic poles generated in 6b are also reversed.

[0017] Thus, N-pole pole core 14b entire width of the core width W ₁ of the front core portion 16a is applied to the entire width, S pole pole core 14a with respect to the entire width of the core width W ₂ of the rear core portion 16b at the same time the full width And the front angle ends (with respect to the rotor rotation direction) of the opposite pole pole cores located rearward of the pole pole cores 14a and 14b in the rotor rotation direction are in the position A where the magnetic field pole change is zero (waveform).
₀ (B ₀ ), the position A ₁ , B ₁ of the rear corner end (with respect to the rotor rotation direction) of each of the core portions 16 a, 16 b of the stator block 16, and the respective core portions 16 a,
16b, and passes through the center positions A ₂ , B ₂ of the stator block 16 and further the front corner position A of each of the core portions 16a, 16b of the stator block 16.
₃ , B ₃ , the magnetic field pole change 0 point (waveform) position A ₄ ,
B ₄ (At this point, the front corner of the front pole core is at position A ₅ ,
Between to reach B _5), the rear pole core 14a,
14b and each core portion 16 of the C-shaped stator 18
When the magnetic poles of the magnetic poles a and 16b are different from each other, a positive attractive magnetic force acts, and the forward pole cores 14a and 14b and C
When both magnetic poles of the core portions 16a and 16b of the shaped stator 18 are the same, a positive repulsive force is generated. Lag phase α
The front motor action A zone Z ₁ , the front motor action B zone Z ₂ , and the rear motor action A zone Z ₃ and the rear motor action B zone Z ₄ in which the motor action is generated by the action of the two magnetic forces when the magnetic field is generated. In each zone, a positive rotation torque (positive magnetic field) in the rotor rotation direction is generated. The S pole core 14a and the N pole core 14b of the magnetic pole rotor 7 are connected to the front core 1 of each C-shaped stator 18.
6a and the rear core portion 16b alternately move and pass in a sequential cycle, and continuously apply a positive rotation torque in the rotor rotation direction by the accumulation of the total balance action. To provide motor action. In addition, as a condition for generating the motor action, it is necessary to generate an independent strong magnetic field magnetic flux (positive rotation torque) of a certain level or more, which requires an output electric load of a certain level or more (in proportion to the output electric load). The magnetic flux increases.)

More specifically, the front core portion 16a and the rear core portion 16b of the stator block 16 will be described.
If no magnetic field is generated, the magnetic field flux generated in the magnetic pole 14 of the magnetic pole rotor 7 causes the S pole core 14a (the N pole core 1) of the magnetic pole 14 as shown in FIG.
4b) center position (1/2 of pole core pitch Pp)
Is sucked in a direction corresponding to the center position of the iron core of the front core portion 16a (rear core portion 16b) ( _{１ ／ of} the iron core widths W ₁ and W ₂ ). Therefore, as shown in the drawing, the waveform of the magnetic attraction of the pole cores against the iron core is generated in the plus direction and the minus direction with respect to the core portions 16a and 16b of each stator block 16. In addition, regarding the waveform shown in FIG. 7, the operation when the value of X / Y is an integer and the cores 16a, 1
In the case where one stator block 16 is installed, when the magnetic pole rotor 7 is rotated one turn, the stator core 16 is intermittently moved 16 times in the minus direction with respect to one stator block 16. Although the suction force (brake action) is applied, the action in the plus direction 16 times has a different action phase from the action in the minus direction, and the action in the minus direction cannot be canceled. Therefore, the action in the minus direction becomes an intermittent load, and the rotation unevenness of the sawtooth wave occurs.

On the other hand, the S pole core 14a of the magnetic pole 14
Total number X of N pole cores 14b and C-shaped stator 1
When the relationship between the number Y and the number 8 is such that the value of X / Y does not become an integer, the waveform of the iron attractive magnetic force for each C-shaped stator 18 becomes a multiplex waveform as shown in FIG. Accordingly, seven odd waveforms can be formed at regular intervals between the pole core pitches Pp. In this case, the field magnetic force of the magnetic pole rotor 7 is higher than that of the front core portion 16a and the rear core portion 16b of the C-shaped stator 18. The magnetic head is divided into two parts by a uniform force: a positive magnetic attraction function that performs a motor function in the rotor rotation direction, and a negative magnetic attraction function that performs a brake function in the opposite direction. The positive and negative magnetic attractive forces are generated in all phases (360 degrees).
All pole cores 14a, 14b and all stator blocks 16
Between the core portions 16a and 16b, and antagonize with the overall action to create a total balance action. Therefore, the magnetic pole rotor 7 that generates the field main magnetic flux φ receives a total balance effect in any phase, and thus has no rotation unevenness and rotates smoothly. Thus, the rotational power load generated between the magnetic force and the core iron core of the stator block 16 is reduced or eliminated. Each C-shaped stator 18
The magnetic field generated in the same way is similarly subjected to the above-described total balance action, and generates a strong positive rotation torque by the overall action.

FIG. 9 shows that the AC electromotive force generated independently by the C-shaped stator 18 by the DC generator 1 described in the above embodiment is rectified by the full-wave rectifier circuit 19 into the DC power which is individually independent. 5 shows a rectified waveform in the state shown in FIG. By providing the full-wave rectifier circuit 19 in each of the independent C-shaped stators 18, the induced alternating current flows in one direction, so that the magnetic field delay phase is delayed by 90 electrical degrees from the field main magnetic flux φ. The phase is fixed to a constant delay phase α corresponding to a power factor of 1 (cross-magnetization effect). Further, the magnetic fluxes of the N pole and the S pole generated by the armature reaction are generated in a direction opposite to the field main magnetic flux φ flowing from the N pole to the S pole by a counter-electromotive force (see FIG. 4).

Referring to FIG. 6 based on the action waveform of the delayed magnetic field corresponding to a power factor of 1 (cross-magnetization action),
At the time of an output electric load of a certain value or more, the N-pole core 14b, which matches over the entire width of the core of the front core portion 16a on the front side in the rotor rotation direction of the stator block 16 and moves in the rotor rotation direction, passes through the iron core, At the same time, the rear S pole core 14a (with respect to the rotor rotation direction) moves in the rotor rotation direction, and an N pole magnetic field is generated in the front core portion 16a. On the other hand, the front core part 1
6a, an S pole core 14a extending over the entire width of the core of the rear core portion 16b of the stator block 16.
Move in the direction of rotor rotation and pass through the iron core, and the rear N-pole core 14b moves in the direction of rotor rotation and engages the entire width of the core of the rear side core portion 16b until the rear core 16b matches.
An S-pole magnetic field is generated in the portion b. And the front side core part 16
a and the rear core portion 16b, the S pole core 14
a and the N-pole core 14b rotate and alternate with each other, and a magnetic field of the opposite polarity is generated alternately in the front core portion 16a and the rear core portion 16b. In short, when the magnetic pole rotor 7 generating the field main magnetic flux φ rotates, seven C
Independently induced AC electromotive force is induced in the stator 18 and an AC current is generated. The AC current causes the front core portion 16a and the rear core portion 16b of the C-shaped stator 18 to have
Due to the armature reaction, the lagging magnetic fields of the S pole and the N pole are sequentially and alternately repeated, and are generated in a cycle.

The front motor when acting A zone Z ₁ will be described, the rotor rotational direction front side N pole core width W ₁ of the front core portion 16a provided on the pole core 1 of C-shaped stator 18
4b is perfectly hung and matched, and N pole core 1
Between the direction end after 4b is moved from the position A ₀ to the position A _4, since the magnetic field of the N pole is generated on the front side core portion 16a, an N pole pole core 14b becomes N pole homopolar, in the direction of rotor rotation Receives positive repulsive magnetism. S pole core 14 at the back of N pole core 14b acting simultaneously
1/2 of the core width W ₁ of a previous direction end position A ₀ Move the rotor rotation direction front core portion 16a (center) position A ₂
, And further moves until reaching the position A ₄ , which is the same magnetic field of the N pole as described above. Since the S pole core 14 a has a different polarity with respect to the N magnetic field, the S pole core 14 a Receives a positive attractive magnetic force in the rotor rotation direction. Therefore, a motor action by the bipolar combination occurs.

For the front motor action B zone Z ₂ ,
When the S-pole core 14a further starts to move in the rotor rotation direction, the magnetic field of the front core portion 16a starts to change to the S-pole, and becomes a strong S-pole magnetic field depending on the moving position. And S
Between the forward angle end pole pole core 14a is moved from the position A ₄ to the position A _5, since the magnetic field of the S pole is generated on the front side core 16a, S-pole pole core 14a becomes the S pole homopolar, plus the direction of rotor rotation Subject to repulsive magnetism. S pole pole core 14a is forward angle end of the rear of the N pole pole core 14b from the position A ₀ to move the rotor rotating direction reaches the position A _4, the front core portion 16a running parallel simultaneously acting
Since the same S-pole magnetic field is generated as described above, the N-pole core 14b is subjected to a positive attractive magnetic force due to the different pole. Therefore, the motor action is further increased by the combined action. Then, the S-pole core 14a and the N-pole core 14b alternately and sequentially act on the front core portion 16a.

On the other hand, the rear motor action A zone Z ₃ will be described, hanging entirely S pole pole core 14a in the core width W ₂ of the side core portions 16b after providing the rotor rotation direction rear side of the C-shaped stator 18 matched, and so direction end after the S pole pole core 14a is in during the movement from the position B ₀ to the position B _4, the magnetic field of the S pole on the rear side core 16b is generated, the S pole pole core 14a is the S pole homopolar And receives a positive repulsive magnetic force in the rotor rotation direction. At the same time, the front corner of the N pole core 14b behind the S pole core 14a acting in parallel moves from the position B _{0 in the} rotor rotation direction, and is １ ／ (center) of the iron core width W ₂ of the rear core portion 16b.
Passes the position B _2, until further reaches the position B ₄ moves a magnetic field of the same S-pole as described above, to become the N-pole pole core 14b is opposite poles relative to the S pole magnetic field, N pole The pole core 14b receives a positive attracting magnetic force in the rotor rotation direction. Therefore, a motor action by the bipolar combination occurs.

For the rear motor action B zone Z ₄ ,
When the N-pole core 14b starts moving further in the direction of rotation of the rotor, the magnetic field of the rear core portion 16b starts to change to the N-pole, and becomes a strong N-pole magnetic field depending on the moving position. And N
Pole during the forward angle end pole core 14b is moved from the position B ₄ to the position B _5, N pole pole core 14b so the magnetic field of the N pole is generated on the rear side core 16b becomes homopolar, plus repulsive force to the rotor rotation direction Be affected. S pole core 1 behind N pole core 14b acting simultaneously
Forward angle end of 4a from the position B ₀ to move the rotor rotating direction reaches the position B ₄ is the magnetic field of the same N-pole and the, S pole pole core 14a receives positive suction force action by heteropolar. Therefore, the motor action is further doubled by the bipolar combination. Therefore, the conversion efficiency from mechanical power energy to electric energy can be increased.

That is, the S pole core 1 of the magnetic pole rotor 7
The relationship between the total number X of the 4a and the N pole cores 14b and the total number Y of the two core portions 16a and 16b of the C-shaped stator 18 is defined as a relationship where X / Y is not an integer. The C-type stator 1
8, a smooth total balance action without resistance occurs in all phases (360 degrees) of the magnetic pole rotor 7 between the core portions 16a and 16b and the magnetic pole 14. Then, a synergistic effect is produced by stacking the total balance action on the total motor action of the zones Z _{1 to} Z ₄ , and the rotating magnetic pole rotor 7 receives a strong motor action (positive rotation torque), It is expected that the conversion efficiency from mechanical power energy to electric energy can be improved to 96% or more.

The DC generator according to the present invention is not limited to the above-described embodiment, but may be any suitable arrangement such as the number of magnetic pole rotors, the number of C-shaped stators, the shape, the number of coils, the number of stator coils, the full-wave rectifier circuit, etc. Can be changed. For example, the magnetic pole rotor may be a rotating body, such as a round shape, a windmill shape, a disk shape using a permanent magnet, a bowl shape, a roller shape, etc., in addition to a rundle shape. Further, the stator coil does not necessarily need to be separated before and after the rotor rotation direction. Further, in the embodiment, the case where a single-phase circuit is used has been described, but a three-phase circuit may be used. Further, in the case where the number of the C-shaped stators is an even number or in the case of a three-phase circuit, the number of the C-shaped stators is not limited to one full-wave rectifier circuit. Further, the excitation circuit may employ not only the separately excited type but also the self-excited type. Further, the magnetic insulation means of each C-shaped stator may be configured such that a spacer is provided between the stator block and the fixed frame.

[0028]

As described in detail above, according to the first aspect of the present invention, the mechanical power load due to the armature reaction can be reduced or eliminated, and the armature induction reactance can be suppressed to a minimum value. Therefore, the conversion efficiency from mechanical power energy to electric energy is improved.

According to the second aspect of the present invention, the magnetic pole and C
The interaction with the shaped stator as a whole is balanced, the rotational power load on the magnetic pole rotor is reduced or eliminated, and the conversion efficiency from mechanical power energy to electrical energy is further improved.

[Brief description of the drawings]

FIG. 1 is a front partial cross-sectional view of a DC generator showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a development view of a stator block and magnetic poles shown in FIG. 2;

4 is an origin magnetic flux waveform diagram showing a relationship between a magnetic field flux wave and a field main magnetic flux wave on the assumption that there is no delay in a magnetic field in the DC generator shown in FIG. 1;

FIG. 5 is an operating magnetic flux waveform diagram showing magnetic field magnetic flux waves corresponding to a power factor of 1 at an electrical angle of 90 ° behind the field main magnetic flux in the DC generator of FIG. 1;

FIG. 6 is a waveform diagram showing a field main magnetic flux wave and a magnetic field magnetic flux wave in the DC generator shown in FIG. 1, and an explanatory diagram of an action at each position of a magnetic pole with respect to both core portions of a C-shaped stator.

FIG. 7 is an explanatory diagram of an action of a field magnetic force of a magnetic pole on an iron core of a core portion of a C-shaped stator in the DC generator of FIG. 1;

FIG. 8 is a waveform diagram showing a state in which seven attraction magnetic forces generated in the DC generator shown in FIG. 1 are stacked.

FIG. 9 is a waveform diagram showing a state in which a full-wave rectifier circuit rectifies induced AC electromotive force generated in each C-shaped stator into DC power in the DC generator shown in FIG.

[Explanation of symbols]

1 DC generator, 2 casing, 3, 4 end frame, 5, 6 bearing part, 7 magnetic pole rotor, 8
..Rotor shaft, 9 (9a, 9b)
Excitation coil, 10a, 10b ··· Winding end, 11a, 1
1b slip ring, 12a, 12b biasing spring, 13a, 13b brush, 14, magnetic pole, 14a
..S pole pole core, 14bN pole pole core, 15
..Fixed frames, 16.Stator blocks, 16a
··· Front core section, 16b ··· Rear core section, 17 ··· Stator coil (armature winding), 17a, 17b ··· Wound both ends, 18 ··· C-shaped stator, 19 ··· Full-wave rectifier circuit, 2
0 ... Smoothing capacitor, 21 ... Load circuit, 22 ... DC power supply circuit for excitation, 23 ... Plus connection wire, 24 ...
Open / close switch, 25 DC power control device, 26 negative connection wire, α lag phase, φ main field magnetic flux,
Pp ·· pole core pitch, Ps ·· stator core pitch, W ₁ , W ₂ ··· core width.

Claims (2)

[Claims] 1. An N-pole and a S-pole of a magnetic pole in a rotation direction of a rotor shaft.
A DC generator having a magnetic pole rotor in which poles are alternately arranged, comprising a plurality of C coils formed by winding stator coils around a substantially C-shaped groove-shaped stator block having a core portion before and after a rotation direction of a rotor shaft. And a full-wave rectifier circuit connected to both ends of the winding of each stator coil.
A DC generator, wherein the plurality of C-shaped stators are arranged at intervals substantially corresponding to the pitch width of both core portions of the shaped stator, and the plurality of C-shaped stators are magnetically insulated. 2. The DC generator according to claim 1, wherein the total number X of the magnetic poles and the total number Y of the core portions of the C-shaped stator are set so that the value of X / Y does not become an integer.