JP2019221037A - DC generator - Google Patents

Abstract

To provide a DC generator that is less likely to fail, is less likely to damage a coil, is light in weight and small in size, can be manufactured at low cost, has excellent waterproofness, and can be used even in water.SOLUTION: A disk-shaped rotor 1A and a stator 1B are provided close to each other concentrically on a rotation axis R. The rotor is configured by providing a plurality of magnet bodies 6 in which N-pole portions 6a and S-pole portions 6b are alternately arranged. The stator includes: a circular ring 2; a coil body 3, disposed on an inner circumference side, configured by alternately and continuously forming a convex bulging portion 3a composed of a first coil wire 4 and a second coil wire 5 and located near the inner peripheral surface of the circular ring and a concave bulging portion 3b located at the center thereof to form an even number of poles; first diodes 7 provided at both ends of the first coil wire forming the same; second diodes 8 provided at both ends of the second coil wire forming the coil body 3; and a resin member 9 for sealing and fixing the coil body to the inner peripheral surface of the circular ring.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a DC generator used for a power generation brake of a train, for example.

  DC generators are used in various fields such as, for example, power generation brakes for trains. This DC generator generally rotates a magnet (stator) and a coil (rotor) wound around a core in mutually opposite directions, and thereby causes a current generated in the coil to flow through a commutator connected to the coil. (See, for example, Patent Document 1).

JP 2009-207341 A

  However, a conventional DC generator uses a brush and a commutator, and these brushes slide and wear with each other, so that there is a problem that they are likely to cause a failure. Further, since the coil is in a so-called bare state, it is easily damaged. In addition, since a core for winding a coil is used, there is a problem that the weight increases.

  Furthermore, the use of these brushes, commutators, and cores has the problems of increasing the manufacturing cost of the DC generator and increasing the size (thickness). In addition, there is also an inconvenience that it cannot be used underwater because of lack of waterproofness.

  The present invention has been made in view of these problems, and provides a DC generator which has few failures, hardly damages a coil, is lightweight and small (thin), has low manufacturing cost, has excellent waterproofness, and can be used underwater. The task is to

  The DC generator 1 according to claim 1 is a DC generator including a disk-shaped rotor 1A and a stator 1B provided concentrically near a rotation axis R. , A plurality of permanent magnet bodies 6 in which N-pole portions 6a and S-pole portions 6b are alternately arranged.

  Further, the stator 1B is arranged at least on the circular ring 2 and on the inner peripheral side of the circular ring 2 and includes a first coil wire 4 and a second coil wire 5, and the inner peripheral surface of the circular ring 2 A coil body 3 formed by alternately and continuously forming convex bulges 3a located in the vicinity and concave bulges 3b located in the center of the circular ring 2 to form an even number of poles; A first diode 7 provided at each of both ends of the first coil wire 4 forming the coil body 3 and a second diode provided at each of both ends of the second coil wire 5 forming the coil body 3 8 and a resin member 9 for sealing and fixing the coil body 3 to the inner peripheral surface of the circular ring 2.

  The DC generator 1 according to claim 2 is a DC generator including a disk-shaped rotor 1A and a stator 1B provided concentrically near a rotation axis R, wherein the rotor 1A is: At least a plurality of permanent magnet bodies 6 in which N-pole portions 6a and S-pole portions 6b are alternately arranged are provided.

  Further, the stator 1B is arranged at least on the circular ring 2 and on the inner peripheral side of the circular ring 2 and includes a first coil wire 4 and a second coil wire 5, and the inner peripheral surface of the circular ring 2 A plurality of coil bodies 3 which are formed by alternately and continuously forming convex bulges 3a located in the vicinity and concave bulges 3b located in the center of the circular ring 2 and forming even-numbered poles A first diode 7 provided at each of both ends of the first coil wire 4 forming the coil body 3, and a second diode provided at each of both ends of the second coil wire 5 forming the coil body 3. The two diodes 8 and the plurality of coil bodies 3 are provided with a resin member 9 for sealing and fixing to the inner peripheral surface of the circular ring 2 in a non-contact state with each other. , Polymerization position with its position shifted at equal intervals in the circumferential direction Characterized in that the placed.

  The DC generator 1 according to claim 1 includes a stator 1B including a circular ring 2, a coil body 3, a magnet body 6, a first diode 7, a second diode 8, and a resin member 9, at least. Since the core, brush and commutator, which have been conventionally required, are not required, there are few failures, and the device is light and small (thin), and the manufacturing cost is low.

  Further, since the coil body 3 is sealed and fixed to the inner peripheral surface of the circular ring 2 by the resin member 9, damage to the coil body can be prevented. It can also be used (power generation) in water. Further, the coil body 3 that rotates during power generation can be held in a stable posture.

  The DC generator 1 according to the second aspect exhibits the same effect as the first aspect. Further, since the plurality of coil bodies 3 are provided in a superposed state in which their positions are shifted at equal intervals in the circumferential direction, the power generation capacity can be increased.

It is a side view showing the DC generator according to the first embodiment of the present invention. It is a front view which shows the rotor of the DC generator shown in FIG. FIG. 2 is a front view showing a positional relationship between a rotor and a stator of the DC generator shown in FIG. 1. It is a front view which shows the stator of the DC generator shown in FIG. FIG. 2 is a front view showing a stator of the DC generator shown in FIG. 1 (with a resin member removed). It is a front view showing the stator of the direct current generator concerning a second embodiment of the present invention (state where a resin member is removed). It is a front view showing the stator of the direct current generator concerning a third embodiment of the present invention (state where a resin member is removed). It is a front view showing the stator of the direct current generator concerning a third embodiment of the present invention (in the state where a resin member was provided). FIG. 9 is a partial cross-sectional side view of the DC generator shown in FIG. 8. FIG. 9 is a wiring diagram of the DC generator shown in FIG. 8. It is a front view showing the stator of the DC generator concerning a fourth embodiment of the present invention. It is a side view showing a stator of a DC generator according to a fourth embodiment of the present invention. It is a side view showing the stator of the DC generator according to the fifth embodiment of the present invention.

  A DC generator 1 according to a first embodiment of the present invention will be described with reference to FIGS. This DC generator 1 includes a disk-shaped rotor 1A provided with its side surfaces close to each other concentrically with the rotation axis R, and a disk-shaped stator 1B having the same outer diameter as the rotor 1A. . Bearings B are provided at both ends of the rotating shaft R, and pulleys P for transmitting power to an external mechanism via a belt (not shown) are provided at one end.

  The rotor 1A is fixed to the rotation axis R and rotates, and the stator 1B is not fixed to the rotation axis R and does not rotate. Note that a configuration in which the stator 1B is rotated in a direction opposite to that of the rotor 1A may be employed.

  The rotor 1A has a plurality of U-shaped permanent magnets 6 arranged at equal intervals so that the respective N-pole portions 6a and S-pole portions 6b face each other. The pole portions 6b are alternately provided at equal intervals (not shown in FIG. 1, although the S pole portion 6b is present on the back side of the N pole 6a, and the N local portion 6a is located on the back side of the S local portion 6b. Exists). The arrangement of the magnet body 6 is set so as to correspond to the radial portion of the coil body 3 of the rotor 1A (see FIG. 3). The magnet body 6 is fixed by a resin member 9 described later.

  The stator 1B includes a circular ring 2, one coil body 3, a magnet body 6, a first diode 7, a second diode 8, and a resin member 9.

  The circular ring 2 forms a true circular shape having a thickness necessary for disposing one coil body 3 (that is, a thickness substantially equal to that of one coil body 3).

  The coil body 3 is disposed on the inner peripheral surface side of the circular ring 2, and therefore has an outer diameter slightly smaller than the inner diameter of the circular ring 2. This coil body 3 is composed of a first coil wire 4 and a second coil wire 5, and has four convex bulging portions 3 a located near the inner peripheral surface of the circular ring 2 and a central portion of the circular ring 2. The four bulging portions 3b to be formed are alternately and continuously formed. This forms an even number (four) of poles. Two output lead wires 11 are connected to the coil body 3.

  The reason why the coil body 3 is formed by the two wires of the first coil wire 4 and the second coil wire 5 is that the induced current generated in the vicinity of the magnet repeats so-called going and returning, so that it can be accommodated. It is.

  Two first diodes 7 are provided, each of which is provided at one end and the other end of the first coil wire 4 forming the coil body 3. Two second diodes 8 are also provided, each of which is provided at one end and the other end of the second coil wire 5 forming the coil body 3. Since the first diode 7 and the second diode 8 are electronic elements having a rectifying function (a function of flowing a current only in a certain direction), they are effective for converting an alternating current into a direct current.

  The resin member 9 seals and solidifies the coil body 3 on the inner peripheral surface of the circular ring 2 and fixes it on the inner peripheral surface of the circular ring 2. That is, after disposing the coil body 3 in the mold, the molten resin member 9 is poured into the mold, solidified, and then removed from the mold. Then, the extracted one is fixed inside the circular ring 2. In addition, the resin member 9 in a molten state is formed by pouring so as to fix the coil body 3 located on the inner peripheral surface side of the circular ring 2, and the coil body 3 is formed on the inner peripheral surface of the circular ring 2. It is also possible to fix them. Although not limited, the coil body 3 is disposed inside the circular ring 2 so that the surface thereof has a depth of about 4 mm from the surface of the resin member 9.

  Although the method of forming the resin member 9 is not limited, in the present embodiment, as shown in FIG. 4, a groove 9 a having a width in which the radial portion of the coil body 3 can enter is formed in the resin member 9 in the radial direction. ing. The coil body 3 can be held by the groove 9a. Note that the coil body 3 can be brought into close contact with the resin member 9 without providing such a groove 9a. Further, the constituent material of the resin member 9 is not limited, but in the present embodiment, the resin member 9 is formed by mixing the resin and the ferrite powder at a ratio of 1: 9. The mixing ratio is not limited.

  FIG. 6 shows a DC generator 1 according to a second embodiment of the present invention. The feature of this DC generator 1 is that two coil bodies 3 are provided. The two coil bodies 3 are arranged on the inner peripheral surface side of the circular ring 2 in a superposed state in which respective positions are shifted at equal intervals in the circumferential direction. As a result, eight poles are formed by the two coil bodies 3, and the power generation capacity thereof is twice that of the DC generator 1 of the first embodiment.

  In addition, the thickness of the circular ring 2 is set to be substantially the same as the thickness of the two coil bodies 3 in a state of being superimposed, thereby miniaturizing (thinning) the DC generator 1. .

  FIGS. 7 to 9 show a DC generator 1 according to a third embodiment of the present invention. The feature of this DC generator 1 is that three coil bodies 3 are provided. As in the second embodiment, the three coil bodies 3 are arranged on the inner peripheral surface side of the circular ring 2 in a superposed state in which respective positions are shifted at equal intervals in the circumferential direction. Thereby, twelve poles are formed by the three coil bodies 3, and the power generation capacity is three times that of the DC generator 1 of the first embodiment.

  Note that the wall thickness of the circular ring 2 of the present embodiment is set to be substantially the same as the wall thickness of the three coil bodies 3 stacked, as in the case of the second embodiment, to reduce the size (thinning). (See FIG. 9).

  The state where the three coil bodies 3 in the DC generator 1 according to the third embodiment are fixed by the resin member 9 is shown in FIGS. Since the three coil bodies 3 are all tightly sealed by the resin member 9 and fixed inside the circular ring 2, damage to the coil bodies 3 can be prevented.

  Further, since the coil body is sealed, it is not damaged, and is applicable to use in water. Further, breakage and displacement due to centrifugal force and vibration during rotation during power generation can be prevented. In addition, a through hole 10 through which the rotation axis R passes is formed at the center of the coil body 3.

  FIG. 10 shows a circuit diagram of a DC generator 1 according to the third embodiment. This is provided with three coil bodies 3 (thus three phases), and each coil body 3 (phase) is connected in series. Each phase performs 4-pole AC power generation. That is, as shown in this figure, each of the three coil bodies 3 forms a phase, and each of the coil bodies 3 forms four poles, and a total of 12 poles generate power. A first diode 7 is arranged at each end of the first coil wire 4 of each coil body 3, and a second diode 8 is arranged at each end of the second coil wire 5.

  As described above, since the first diode 7 and the second diode 8 are electronic elements that serve to regulate the current in a certain direction, the currents passing through the first coil wire 4 and the second coil wire 5 flow in the same direction. Flow (direct current).

  The current passing through the first coil wire 4 and the second coil wire 5 in each coil body 3 is caused to flow in the same direction by the first diode 7 and the second diode 8, collected at the output section S, and output therefrom. .

  A DC generator 1 according to a fourth embodiment is shown in FIGS. A feature of the DC generator 1 is that eight substantially rectangular magnet bodies 6 are used. Each magnet body 6 has an N local portion 6a and an S local portion 6b on the front side and the rear side, and the N local portions 6a and the S local portions 6b are arranged alternately. This magnet body 6 can also exhibit the same operation and effect as the magnet body 6 according to the first to third embodiments.

  FIG. 13 shows a DC generator 1 according to the fifth embodiment. The feature of this DC generator 1 is that, similarly to the second embodiment and the third embodiment, the plurality of coil bodies 3 are provided in a superposed state, and thereby the flesh inevitably generated in the superposed portion of the plurality of coil bodies 3. This is a structure corresponding to the thick portion 3c. That is, the first step S1 is formed on the stator 1B, and the second step S2 having a shape matching the first step S1 is formed on the rotor 1A. And the thick part 3c is arrange | positioned at the convex part of the 1st step part S1, and the magnet body 6 is arrange | positioned at the convex part of the 2nd step part S2. By arranging the magnet body 6 on the convex portion of the second step S2, the magnet body 6 can be brought close to the coil body 3, so that the magnetic force can be effectively applied. Thereby, the power generation capacity can be increased.

  The DC generator 1 according to the first to fifth embodiments has the following functions and effects.

  (A) The stator 1A is composed of a circular ring 2, a coil body 3, a magnet body 6, a first diode 7, a second diode 8, and a resin member 9, and at least a core, a brush, and a rectifier, which are conventionally required. Since there is no need for a component, there are few failures, the device is lightweight and small (thin), and the manufacturing cost is low.

  (B) The coil body 3 is sealed and hardened together with the inner peripheral surface of the circular ring 2 by the resin member 9 and fixed to the inner peripheral surface of the circular ring 2, so that the coil body 3 can be used even underwater (power generation) and can be used during power generation The rotating coil body 3 can be held in a stable posture.

  (C) In the DC generators 1 of the second and third embodiments, the plurality of coil bodies 3 are provided in a superposed state in which their positions are shifted at equal intervals in the circumferential direction, so that the power generation capacity can be increased. .

  In the first to third embodiments, the number of coil bodies is one, two, and three, respectively. However, the number of coil bodies is not limited to this, and the number of coil bodies depends on the required power generation capacity. It can be more.

  The DC generator of the present invention can be applied as a DC motor.

Reference Signs List 1 DC generator 1A Rotor 1B Stator 2 Circular ring 3 Coil body 3a Convex bulge 3b Concave bulge 3c Thick part 4 First coil wire 5 Second coil wire 6 Magnet 6a N pole 6b S Pole part 7 First diode 8 Second diode 9 Resin member 9a Groove 10 Through hole 11 Lead wire B Bearing P Pulley R Rotary shaft S Output part
S1 First step S2 Second step

Further, the stator 1B is arranged at least on the circular ring 2 and on the inner peripheral side of the circular ring 2 and includes a first coil wire 4 and a second coil wire 5, and the inner peripheral surface of the circular ring 2 A coil body 3 formed by alternately and continuously forming a convex bulge 3a located in the vicinity and a concave bulge 3b located in the center of the circular ring 2 to form an even number of poles; A first diode 7 provided at each of both ends of the first coil wire 4 forming the coil body 3 and a second diode provided at each of both ends of the second coil wire 5 forming the coil body 3 8, and a resin member 9 for fixing the coil body 3 to the inner peripheral surface of the circular ring 2 so as to cover the entire surface of the coil body facing the rotor .

Further, the stator 1B is arranged at least on the circular ring 2 and on the inner peripheral side of the circular ring 2 and includes a first coil wire 4 and a second coil wire 5, and the inner peripheral surface of the circular ring 2 A plurality of coil bodies 3 which are formed by alternately and continuously forming convex bulges 3a located in the vicinity and concave bulges 3b located in the center of the circular ring 2; A first diode 7 provided at each of both ends of the first coil wire 4 forming the coil body 3, and a second diode provided at each of both ends of the second coil wire 5 forming the coil body 3. A resin member for fixing the two diodes 8 and the plurality of coil bodies 3 to the inner peripheral surface of the circular ring 2 in a non-contact state so as to cover the entire surface of the coil body facing the rotor. 9 and the plurality of coil bodies 3 Characterized in that a its position in the polymerised state shifted at equal intervals in the circumferential direction.

Claims (2)

A DC generator comprising a disk-shaped rotor (1A) and a stator (1B) provided concentrically close to a rotation axis R,
The rotor is constituted by providing at least a plurality of magnet bodies (6) in which N-pole portions (6a) and S-pole portions (6b) are alternately arranged,
The stator is at least
A circular ring (2),
A convex bulge (3a), which is arranged on the inner peripheral side of the circular ring, is constituted by a first coil wire (4) and a second coil wire (5), and is located near the inner peripheral surface of the circular ring; A coil body (3) formed by alternately and continuously forming concave bulges (3b) located at the center of the circular ring to form an even number of poles (P);
First diodes (7) provided at both ends of a first coil wire forming the coil body,
A second diode (8) provided at each of both ends of a second coil wire forming the coil body;
A DC generator, comprising: a resin member (9) for sealingly fixing the coil body to an inner peripheral surface of the circular ring. A DC generator comprising a disk-shaped rotor (1A) and a stator (1B) provided concentrically close to a rotation axis R,
The rotor is constituted by providing at least a plurality of magnet bodies (6) in which N-pole portions (6a) and S-pole portions (6b) are alternately arranged,
The stator is at least
A circular ring (2),
A convex bulge (3a), which is arranged on the inner peripheral side of the circular ring, is constituted by a first coil wire (4) and a second coil wire (5), and is located near the inner peripheral surface of the circular ring; A plurality of coil bodies (3) formed by alternately and continuously forming concave bulges (3b) located at the center of the circular ring to form an even number of poles (P);
First diodes (7) provided at both ends of a first coil wire forming the coil body,
A second diode (8) provided at each of both ends of a second coil wire forming the coil body;
A resin member (9) for sealing and fixing the plurality of coil bodies to the inner peripheral surface of the circular ring in a non-contact state with each other;
A DC generator, wherein the plurality of coil bodies are arranged in a superposed state in which their positions are shifted at equal intervals in a circumferential direction.

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