JP2006074959A - Igniting permanent magnet power generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a permanent magnet power generator having a coil wire prevented from being cut or broken even if it is very thin, simplifying a coil winding process, and reducing a cost. <P>SOLUTION: The permanent magnet power generator 1 comprises a rotor 2 with the permanent magnet 22, and a stator 3 provided within the rotor 2. The stator 3 has a plurality of salient poles 32 facing the rotor 3 and radially protruding from an outer circumference of a core 31. A plurality of coils 4a, 4b, 4c are formed on the salient poles 32, and supply power to an ignition plug through a CDI unit. In the permanent magnet power generator 1, a plurality of the coils 4a, 4b, 4c, 4d are identically used and continuously wound by a single coil wire 41, and an crossover 42 from the end of one coil to the beginning of the next coil is formed from a twist wire formed by twisting a plurality of the overlapped coil wires 41. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an ignition permanent magnet generator mounted on, for example, a motorcycle for motocross.

  BACKGROUND ART Conventionally, a generator as shown in Patent Document 1 is known as a permanent magnet generator such as a flywheel magneto mounted on a motorcycle or the like. The permanent magnet generator includes a rotor that is connected to a crankshaft and rotates in conjunction with an engine, and a stator that is disposed on the rotation center side of the rotor and is fixed to the vehicle body side.

  The rotor is cylindrical and a permanent magnet is attached to the inner wall surface. The stator includes a core portion disposed on the rotation center of the rotor, and a plurality of coils arranged radially projecting outward from the outer peripheral surface of the core portion. These coils are formed by winding a coil wire around a bobbin fitted to a salient pole portion projecting radially outward from the core or formed integrally with the core.

  In such a permanent magnet generator, the rotor rotates as the engine is driven, and an alternating current is induced in each coil to generate power.

  Further, as shown in Patent Document 2, an ignition device is known that ignites an engine by inducing a high voltage in an ignition coil from an output of a charge coil of a generator by an ignition circuit provided in a CDI unit.

  And the coil with which such a generator is equipped is formed by winding a coil wire around a bobbin automatically by a winding device as shown in Patent Document 3.

  FIG. 8 shows a conventional permanent magnet generator 71 for ignition. For example, among the coils 74a, 74b, 74c, and 74d in which coil wires are wound around four salient pole portions 72, three coils 74a, 74b, and 74c are operating at low speed, and one coil 74d is operating at high speed. Used as an auxiliary charge coil.

  When the coils 74a to 74c for low speed operation are used as ignition charge coils for charging the capacitors in the CDI unit to ignite the engine, a high voltage of about 300 V, for example, is required as the generated voltage of the coils 74a to 74c. . Therefore, when forming the coils 74a to 74c, a large number of turns must be wound with a very thin coil wire of about 0.1 mmφ. For this reason, if there is a connecting wire between coils due to a thin coil wire, the connecting wire may be cut or damaged due to vibration, thermal shock, or the like during driving of a vehicle body such as a motorcycle. Therefore, conventionally, each coil is wound with one coil wire, the periphery is hardened with resin, the coil wire ends at the beginning and end of winding are connected to the terminal 75, and the terminals 75 are connected to each other as lead wires. By connecting with 76, the three coils 74a, 74b, and 74c were connected in series.

However, it is very difficult for the thin coil wire as described above to be soldered by scraping the covering portion. Therefore, it is necessary to perform terminal processing of the coil wire by a difficult technique such as fusing, and it is troublesome and it is difficult to ensure stable performance of the product. Further, since each coil requires parts such as terminals and lead wires, the number of parts increases and the cost increases.
JP-A-7-95753 JP-A-10-103204 JP 10-233330 A

  The present invention has been made in consideration of the above-described prior art, and even if the coil wire is very thin, it is not cut or damaged during operation, and the coil winding process is simplified to reduce the cost. An object of the present invention is to provide a permanent magnet generator having an ignition charge coil.

  The invention of claim 1 comprises a rotor provided with a permanent magnet and a stator provided inside the rotor, and the stator projects in a radial manner on the outer periphery of the core portion so as to face the rotor. In a permanent magnet generator for ignition in which a plurality of coils formed on the salient pole part supply power to the spark plug via the CDI unit, one coil is used for the same application A winding wire is continuously wound with a coil wire, and a connecting wire between the winding end portion of one coil and the winding start portion of the next coil is formed by a winding wire formed by winding a plurality of coil wires. A permanent magnet generator for ignition is provided.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the twisted wire is automatically formed by a twisted wire forming portion provided in a coil wire winding machine.

  The invention of claim 3 is characterized in that, in the invention of claim 1, the core portion is provided with a locking portion for locking the crossover.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the winding of a coil is performed in which a connecting wire composed of a coil wire between the coils is fitted in the vicinity of the base portion of the salient pole portion of the core portion and the coil wire is wound next. A groove portion for guiding to the starting position is provided.

  According to the first aspect of the present invention, the crossover portion is a twisted wire, so that the strength is increased, and it is possible to prevent the wire from being cut or damaged by vibration or thermal shock. Therefore, since a plurality of coils can be wound continuously with one coil wire, parts such as terminals and lead wires are not required for each coil, and the number of parts can be reduced. Further, since the terminal processing for each coil is not necessary, the number of processes can be reduced.

  According to the invention of claim 2, since the winding wire can be automatically formed by the winding machine, it does not take time and trouble to stop the machine to form the winding wire or to manually form the winding wire. The coil can be continuously wound.

  According to the invention of claim 3, since the intermediate point of the crossover line is supported by the locking portion, the crossover line can be stably held at the intermediate point, and the portion where the crossover line vibrates when the vehicle is traveling is shortened. (Length between the end portion of the coil wire and the locking portion), vibration can be suppressed to a small extent. Therefore, the coil wire is further less likely to be damaged.

  According to the invention of claim 4, by inserting the connecting wire along the groove portion, the connecting wire is further less likely to vibrate and is guided to the winding start position of the next coil. Times can be done.

  A generator using a charge coil of the present invention is mounted on a vehicle such as a motocross motorcycle or a buggy, and generates electric power necessary for engine ignition using the rotational force of the engine as a drive source.

  FIG. 1 is a front view of a permanent magnet generator 1 of the present invention. The generator 1 includes a cylindrical or saddle-shaped rotor 2 that is mounted on an engine crankshaft (not shown) and is driven to rotate in conjunction with the engine, and a stator 3 that is attached to the crankcase side. The rotor 2 includes a holder 21 having a cylindrical side wall and a plurality of permanent magnets 22 attached to the inner wall surface of the holder 21 in the circumferential direction. A plurality of permanent magnets 22 are arranged at equal intervals in the circumferential direction with appropriate intervals.

  The stator 3 is arranged on the inner side of the rotor 2, and includes a core portion 31, a plurality of salient pole portions 32 radially arranged outward from the outer peripheral surface of the core portion 31, and salient pole portions 32. The bobbin 33 is mounted, and the coil 4 is formed by winding a coil wire around the bobbin 33.

  When the engine starts, the rotor 2 rotates together with the crankshaft, and the permanent magnet 22 attached to the rotor 2 rotates on the outer periphery of the stator 3, so that an electromotive force is generated between the rotor 2 and the stator 3. Is generated, and a power generation effect is obtained.

  In the case of FIG. 1, among the four coils 4a, 4b, 4c, 4d, the three coils 4a, 4b, 4c other than the coil 4d are used as ignition charge coils at low speed, for example, 0.1 mmφ It is continuously wound by a coil wire. The coil wires are wound around these three coils 4a to 4c so that the winding directions of adjacent coils are opposite to each other. The coil 4d is used as an auxiliary charge coil at high speed or the like, and is wound by, for example, a coil wire of 0.15 mmφ. Both ends of the coil wire are fixed to the terminal 5 and predetermined wiring is performed.

  FIG. 2 is a circuit diagram of an ignition device using the generator 1 of the present invention.

  The generator 1 is provided with a low-speed coil 4 and an auxiliary coil 4d, each connected to a CDI unit 11 having an ignition circuit (not shown). A pulsar coil 12 is provided outside the generator 1, detects the rotation of the rotor 2 of the generator 1, and transmits an ignition timing signal to the CDI unit 11.

  The ignition circuit is composed of a diode, a capacitor, and the like, and an output from one end of the low speed coil 4 is charged to the capacitor to obtain a charge for inducing a high voltage in the ignition coil 13. Further, an ignition signal for discharging the charged charge is obtained by the output from the other end of the low-speed coil 4.

  A high voltage is induced by causing a current to flow through the ignition coil 13 at a predetermined ignition timing according to a command from the pulsar coil 12 that generates an ignition signal in accordance with the rotation of the rotor 2, and an electric spark is blown to the spark plug 14. Ignite.

  Such a coil 4 is automatically wound by a winding machine. FIG. 3 is a diagram showing an outline of the configuration of the winding machine, and the direction of the arrow indicates the traveling direction of the coil wire. A constant tensile force is applied to the coil wire delivered from the spool 61 by the tensioner 62. When the twisted wire needs to be formed, it is formed when passing through the twisted wire forming portion 63, and when the twisted wire is not required, the coil wire is supplied from the nozzle 64 while keeping the strand. Then, the nozzle 64 is reciprocated to a predetermined width with respect to the bobbin 33, and the coil wire is wound sequentially.

  FIG. 4 is an explanatory diagram showing how to create a twist line in the twist line forming section 63. After hooking the coil wire 41 with the pin 65 and reciprocating it twice on the hook 66 provided at a position corresponding to the required length of the twisted wire, when the pin 65 returns to the original position, the five coil wires 41 are overlapped. Is done. Thereafter, when the hook 66 is rotated in a state where the position of the pin 65 is fixed, the five coil wires 41 that are overlaid are twisted to form a twisted wire. The twisted line is hardened by an epoxy resin or the like. The number of coil wires 41 to be overlaid is set as appropriate, and the number of reciprocations of the pin 65 is determined according to the number.

  The winding wire is formed immediately before the coil wire 41 is wound around one bobbin 33 when winding a plurality of coils continuously, and is wound around the winding end portion by 2-3 turns. Then, the second to third turn of the next coil is wound with a twisted wire. Thereby, the front and back of the connecting wire which is the coil wire 41 between each coil is formed with a twisted wire, and it becomes difficult to break a connecting wire. A twisted wire having a length necessary for such winding is formed by the twisted wire forming portion 63.

  5-7 shows the detailed Example of the stator 3 of the generator 1 of this invention.

  5 is a front view of the stator 3, and FIG. 6 is a rear view of FIG. In addition, although an actual coil winds the thin coil wire 41 with many turns, in FIG.5, FIG.6, the winding frequency is abbreviate | omitted and displayed for description.

  Four salient pole portions 32 are provided radially from the center of each side of the core portion 31 having a substantially square front shape, and the coil wire 41 is attached to the bobbin 33 attached to the salient pole portion 32. It is wound. The salient pole portion 32 is formed of a multilayer plate in which a plurality of thin plates made of a magnetic material integral with the core portion 31 are stacked. The bobbin 33 is made of an insulating material such as synthetic resin, and is integrally formed on the outer periphery of the salient pole portion 32.

  Locking portions 34 for locking the crossover wires 42 are formed at the corners of the core portion 31. Since the coil wire 41 is wound so that the winding directions of adjacent coils are opposite to each other, as shown in FIG. 6, depending on the winding direction of the coil wire 41, the protruding type locking portion 34 a and the bifurcated portion are provided. Two types of the hook type locking portions 34b are alternately provided. In the example of FIGS. 5 and 6, first, after the coil 4 a is wound counterclockwise and the connecting wire 42 extending from the front side of the core portion 31 is locked to the protruding locking portion 34 a (FIG. 6). It is pulled out to the front side of the core part 31. Next, the winding wire 42 is wound clockwise and the connecting wire 42 extending from the back side of the core portion 31 is locked to the hook-type locking portion 34 b and then pulled out to the front side of the core portion 31. Thereafter, the coil 4c is wound counterclockwise, and the terminal of the coil wire 41 is appropriately processed.

  FIG. 7 is an enlarged view around the coil 4b of FIG. In the vicinity of the outer periphery of the core portion 31, a groove portion 35 is formed for guiding the connecting wire 42 to the winding start position of the next coil to be wound. As a result, the winding start position can be stably and accurately wound, and even if the stator 3 vibrates during traveling of the vehicle or the like, the number of portions where the crossover 42 sways is reduced, thereby further preventing damage.

  In this way, the ignition coils 4 a, 4 b, 4 c can be wound continuously by the single coil wire 41. Therefore, it is not necessary to perform the work of fixing both terminals to the terminal for each coil, and both the material cost and the process can be reduced.

  The present invention can be applied to a coil in which a thin coil wire is continuously wound around a plurality of bobbins of the same application.

The front view which shows embodiment of this invention. The circuit diagram of the ignition device using this invention. The schematic block diagram of the winding machine for implementing this invention. Explanatory drawing of the forming method of the twist line in the winding machine of FIG. The front view which shows the Example of the stator of this invention. The rear view of FIG. The elements on larger scale of FIG. The front view of the conventional generator.

Explanation of symbols

1, 71: Generator, 2: Rotor, 3: Stator, 4, 4a, 4b, 4c, 4d, 74a, 74b, 74c, 74d: Coil, 5, 75: Terminal, 11: CDI unit, 12: Pulsar coil, 13: ignition coil, 14: spark plug, 21: holder, 22: permanent magnet, 31: core part, 32, 72: salient pole part, 33: bobbin, 34, 34a, 34b: locking part, 35: Groove portion, 41: coil wire, 42: crossover wire, 61: spool, 62: tensioner, 63: twisted wire forming portion, 64: nozzle, 65: pin, 66: hook, 76: lead wire.

Claims (4)

  The rotor includes a rotor having a permanent magnet and a stator provided inside the rotor, and the stator has a plurality of salient pole portions that project radially from the outer periphery of the core portion so as to face the rotor. In a permanent magnet generator for ignition, in which a plurality of coils formed on the salient pole part supplies power to a spark plug via a CDI unit, a plurality of coils of the same application are continuously connected by one coil wire. The connecting wire between the winding end portion of one coil and the winding start portion of the next coil is formed by a winding wire formed by winding a plurality of coil wires. A permanent magnet generator for ignition.   The permanent magnet generator for ignition according to claim 1, wherein the twisted wire is automatically formed by a twisted wire forming unit provided in a coil wire winding machine.   The permanent magnet generator for ignition according to claim 1, wherein a locking portion for locking the crossover is provided in the core portion. Near the base portion of the salient pole portion of the core portion, a groove portion is provided that guides to a winding start position of a coil that fits a connecting wire formed of a coil wire between the coils and then winds the coil wire. The permanent magnet generator for ignition according to claim 1.

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