JP2005328617A - Synchronous generator compensated by capacitor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a synchronous generator compensated by capacitor of such structure that the connection of the terminal of winding to the tip of terminal fittings can be performed without spatial restriction. <P>SOLUTION: This generator is equipped with a stator where output winding and capacitor exciting winding are wound on a stator core and a rotor where field winding is wound via a bobbin 3 on a rotor core, and diodes D are connected to both ends of the field winding. A bobbin is provided with a pocket 304 which opens to the side of the axial end of the rotor, and a case 4 is set in the pocket 304 capably of mounting and removal. A printed board 5 is arranged and fixed in the case 4. The diodes D are fixed to the printed board 5, and the terminal fittings 11 connected to the printed board 5 is led out of the case 4. The terminal 13 of the field winding is connected outside the case 4 to the terminal fittings 11. The end of the terminal fittings 11 is bent and is projected outside of the bobbin from the side of the case 4, and the terminal 13 of the field winding is connected to the end of the terminal fittings 11 outside the bobbin. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a capacitor-compensated synchronous generator.

  The capacitor-compensated synchronous generator includes a stator S and a rotor R as shown in FIG. The stator S is obtained by winding an output winding WL and a capacitor excitation winding Wc around a stator core with a phase difference of 90 degrees in terms of electrical angle. Loads L are connected to both ends of the output winding WL. A capacitor C is connected to both ends of the capacitor excitation winding Wc. The rotor R is formed by winding a field winding Wf around a rotor core I and connecting a diode D and a reverse voltage prevention resistor r in parallel at both ends of the field winding. Note that the resistor r may be omitted.

  In this type of capacitor-compensated synchronous generator, it is necessary to attach a diode D to the rotor R. As the mounting structure of the diode D, the structure shown in FIGS. 5 to 7 has been proposed (for example, , See Patent Document 1). Here, FIG. 5 is an enlarged perspective view showing a portion where the diode D is attached in the capacitor compensated synchronous generator, and FIG. 6 is a cross-sectional view of the vicinity of the attachment portion of the diode D in the capacitor compensated synchronous generator. 7 is a perspective view showing a rotor used in the AC generator.

  In FIG. 7, reference numeral 1 denotes a two-pole rotor core having first and second magnetic pole portions 1a and 1b at both ends (at intervals of 180 degrees). The rotor core 1 is a laminated steel plate punched into a predetermined shape. It is made up of.

  Cylindrical magnetic pole faces opposed to the rotor magnetic poles (not shown) via gaps are formed on the outer peripheral sides of the first and second magnetic pole parts 1a and 1b, respectively, and initial excitation magnets are formed on the magnetic pole parts 1a and 1b. 2 is buried.

  A resin bobbin 3 is attached to the rotor core 1. The bobbin 3 is formed by fitting the halves 3A and 3B, which are divided into two in the stacking direction of the rotor core 1, into the core 1 and abutting each other. In FIG. 7, 3a has shown the butt | matching line of half part 3A and 3B.

  As shown in FIGS. 5 and 7, the bobbin 3 includes first and second coil winding portions 301 and 302 adjacent to the first magnetic pole portion 1 a and the second magnetic pole portion 1 b of the rotor core 1, respectively. And a connecting portion 303 for connecting the coil winding portions. The first coil winding part 301 includes a coil winding body part 301a and flanges 301b and 301c provided at both ends of the body part. The second coil winding part 302 includes a coil winding body part 302a. It consists of flanges 302b and 302c provided at both ends of the barrel. A first field winding Wf1 and a second field winding Wf2 are wound around the first coil winding portion 301 and the second coil winding portion 302, respectively.

  Between the first coil winding part 301 and the second coil winding part 302, they are respectively positioned on both sides in the width direction of the iron core 1 (direction perpendicular to the center line of the magnetic pole parts 1a and 1b). In addition, first and second pocket portions 304 and 304 ′ are provided so as to be shifted to one end side in the axial direction of the rotor R. These pocket portions 304 and 304 ′ are formed in a box shape having a bottom, and are provided so as to open to the end portion side in the axial direction of the rotor R. Since the shapes of the pocket portions 304 and 304 ′ are the same, the first pocket portion 304 will be described below with reference to FIGS. 5 and 6. The side wall portion 304 a on the inner side of the pocket portion 304 has the side wall portion 304 a. A groove portion 305 extending from one end to the other end, and a pair of groove portions 306 and 306 provided to communicate the groove portion 305 and the inside of the pocket portion 304 are provided. These groove portions 306 and 306 are provided so as to open to the outside in the axial direction of the rotor R, and the pair of groove portions 306 and 306 are set in a predetermined direction in the opposing direction of the first and second coil winding portions 301 and 302. It is provided at a distance. Further, a locking groove or hole 308 is provided through the side wall portion 304 b outside the pocket portion 304.

  As shown in FIG. 7, first and second cases 4 and 4 ′ are detachably fitted in the first and second pocket portions 304 and 304 ′ of the bobbin 3, respectively. Since these cases are configured identically, the first case 4 will be described. The case 4 is formed in a box shape that can be fitted into the pocket portion 304 as shown in FIG. As shown in FIGS. 5 and 6, a locking projection 401 that fits into a notch or hole 308 when fitted into the pocket portion 304 is provided. The locking protrusion 401 has a taper that is inclined in a direction away from the side surface of the case 4 as it goes from the bottom side of the case 4 to the opening side, and when the case 4 is fitted into the pocket portion 304. The locking projection 401 is elastically fitted into the locking groove or hole 308 so that the case 4 is locked.

  As shown in FIG. 6, the diode D and the resistor r are attached to the printed circuit board 5 and attached to the case 4. The diode D is a flat heat sink 6 in which a diode chip 7 is attached to a plate-shaped heat sink 6 and the heat sink 6 and the diode chip 7 are covered with an exterior 8 made of a resin mold portion or the like. have. A groove 8 a for displaying the mounting direction is formed in the exterior 8. The pair of terminals 9 of the diode D are led out from one end thereof so as to extend in the direction along the plate surface of the heat sink 6, and the terminals 9 penetrate the printed board 5 and are soldered to the printed wiring portion provided on the board 5. It is attached. As a result, the diode D is attached in a state where it stands upright from the printed circuit board 5. The resistor r is a lead terminal 10 drawn out from both ends in the axial direction, and the lead terminal 10 penetrates the printed board 5 and is soldered to a printed wiring portion provided on the printed board 5.

  The printed circuit board 5 is also soldered with pin-shaped pair of terminal fittings 11, 11. These terminal fittings 11 and 11 are provided so as to be arranged at positions corresponding to the pair of groove portions 306 and 306 of the pocket portion 304 when the case 4 is fitted into the pocket portion 304.

  The diode D and the resistor r are connected to each other in parallel by the printed wiring portion of the printed circuit board 5, and the terminal fittings 11 and 11 are connected to both ends of the parallel circuit of the diode D and the resistor r.

  The printed circuit board 5 to which the diode D, the resistor r, and the terminal fittings 11 and 11 are attached is inserted into the case 4 and arranged almost parallel to the bottom surface of the case 4 as shown in FIG. The printed circuit board 5, the resistor r, the almost half of the terminal fittings 11 and 11, and the end of the diode D on the printed circuit board 5 side are molded by the resin 12. The diode D is disposed with its plate surface oriented in a direction parallel to the axis of the rotor R, and most of the diode D projects outward from the case 4, and the case 4 is fitted into the pocket portion 304. In this state, the diode D protrudes outward from the axial end of the rotor R in a wing shape.

  The terminal fittings 11, 11 connected to the diode D attached to the first case 4 fitted in the first pocket 304 have a first field introduced into the case 4 through the grooves 305, 306, 306. Terminal portions 13, 13 at both ends of the magnetic winding Wf1 are soldered.

  Similarly, a printed circuit board on which a diode D ′, a resistor r ′ (not shown) and terminal fittings 11 ′ and 11 ′ are mounted is inserted into the second case 4 ′ and fixed by a resin mold portion. 4 'is fitted in the second pocket 304' and the diode D 'is attached to the rotor. Terminal portions at both ends of the second field winding Wf2 are soldered to the terminal fittings 11 ′ and 11 ′.

  A recess A that exposes a side surface (lamination surface) in the width direction of the rotor core 1 is formed in a portion between the flange portions 301c and 302c at both ends in the width direction of the bobbin 3. The magnet for initial excitation can be attached using it.

  A rotating shaft 15 is attached so as to penetrate the central portion of the rotor core 1 in the stacking direction of the iron core 1. Bearings 16 are attached to both ends of the rotary shaft 15, and the rotor R is rotatably supported by a generator case (not shown) via the bearings 16.

  The stator is constructed in exactly the same way as the conventional one.

  As described above, the diodes D and D ′ are attached to the cases 4 and 4 ′, and the cases 4 and 4 ′ are fitted into the pockets 304 and 304 ′ that are opened on the axial end side of the rotor R. Then, since the diodes D and D ′ can be attached and detached from one direction, repair such as assembly of the generator and replacement of the diodes D and D ′ can be facilitated.

Further, since the diodes D and D ′ act like a blower blade with the rotation of the rotor R and move the surrounding air, most of the diodes D and D ′ are in direct contact with the outside air. In combination, the diodes D and D ′ can be cooled well. Therefore, the diodes D and D ′ can be used at low cost by using an inexpensive diode having a smaller capacity than the conventional diodes D and D ′.
No. 7-27817

  However, in the structure as described above, in the space surrounded by the bearing 16, the diode D, the rotating shaft 15, the bobbin 3, etc., the connection of the terminal portion 13 of the winding to the tip of the terminal fitting 11 is performed by soldering. There were the following problems.

(A) Since the periphery of the connection portion is narrow, it is difficult to perform the connection work, which is a manual work.

(B) Due to environmental problems, lead solder is moving toward the abolition. Even when trying to shift the connection work to other welding, fusing, crimping, etc. It is difficult to shift the connection of the terminal unit 13 to the tip due to spatial restrictions.

(C) For the above reasons, the product becomes expensive.

  An object of the present invention is to provide a capacitor-compensated synchronous generator having a structure in which connection of a terminal portion of a winding to the tip of a terminal fitting can be performed without a spatial restriction.

  The present invention provides a stator in which an output winding and a capacitor excitation winding are wound around a stator core, and a field winding is wound around a rotor core via a bobbin. A rotor having diodes connected to both ends, and the bobbin is provided with a pocket portion opened on the axial end side of the rotor, and a case is detachably fitted in the pocket portion. The printed circuit board is disposed and fixed, the diode is connected to the printed circuit board, the terminal fitting connected to the printed circuit board is led out of the case, and the terminal portion of the field winding is the case The capacitor-compensated synchronous generator connected to the terminal fitting outside is covered.

  In the capacitor-compensated synchronous generator according to the present invention, an end of the terminal fitting is bent and protrudes out of the bobbin from a side surface of the case, and the field magnet is provided at the end of the terminal fitting outside the bobbin. The terminal part of a coil | winding is connected, It is characterized by the above-mentioned.

  In the capacitor-compensated synchronous generator according to the present invention, the end of the terminal fitting is bent and protrudes from the side of the case to the outside of the bobbin, and the end portion of the field winding at the end of the terminal fitting outside the bobbin Are connected, there is no spatial restriction at the time of connection, and the connection can be made easily. For this reason, it is possible to automate the connection, and it is possible to shift to a connection that does not use lead solder. Therefore, the cost of the product can be reduced.

  Hereinafter, an example of the best mode for carrying out the capacitor-compensated synchronous generator according to the present invention will be described in detail with reference to FIGS. Here, FIG. 1 is an enlarged perspective view showing a portion where a diode is attached in this capacitor-compensated synchronous generator, FIG. 2 is a cross-sectional view of the vicinity of a diode-attached portion in this capacitor-compensated synchronous generator, It is the perspective view which showed the rotor used with this alternating current generator. The parts corresponding to those shown in FIGS. 4 to 7 are denoted by the same reference numerals.

  In the capacitor-compensated synchronous generator of this example, the description will be made on the first pocket portion 304 side, and the printed circuit board 5 is arranged at the bottom in the case 4 as described above. In this example, the pin-shaped pair of terminal fittings 11 and 11 erected by being electrically connected to the printed circuit board 5 are erected from a position near the outer side wall portion 304b of the first pocket portion 304. Yes. The end portions of the terminal fittings 11 and 11 are bent substantially at right angles to the direction of the outer side wall portion 304b. The front end portions of the terminal fittings 11, 11 bent substantially at right angles are projected out of the bobbin 3 from notches 307, 307 provided in the side wall portion 304 b outside the first pocket portion 304. A terminal portion 13 of the first field winding Wf1 is wound around the tip end portions of the terminal fittings 11 and 11 outside the bobbin 3, and in this example is connected by lead soldering.

  The connection of the end portion 13 of the first field winding Wf1 to the tip end portion of the terminal fitting 11, 11 outside the bobbin 3 may be performed by other welding without lead soldering, fusing, crimping, or the like. it can.

  Further, the connection of the terminal portion 13 of the first field winding Wf1 to the tip end portion of the terminal fitting 11, 11 outside the bobbin 3 can be performed automatically because there is no spatial restriction.

  The second pocket portion 304 ′ side has the same configuration.

  Other configurations are the same as those in FIGS. 4 to 7 described above.

It is the perspective view which expanded and showed the part which attaches a diode with the capacitor | condenser compensation type synchronous generator of this example. It is sectional drawing of the attachment part vicinity of this diode in this capacitor | condenser compensation type synchronous generator. It is the perspective view which showed the rotor used with this alternating current generator. FIG. 3 is an electrical connection diagram of a capacitor-compensated synchronous generator targeted in the present invention. It is the perspective view which expanded and showed the part which attaches a diode with the conventional capacitor | condenser compensation type synchronous generator. It is sectional drawing of the attachment part vicinity of the diode in the conventional capacitor | condenser compensation type synchronous generator. It is the perspective view which showed the rotor used with the conventional capacitor | condenser compensation type synchronous generator.

Explanation of symbols

S Stator R Rotor WL Output winding Wc Capacitor excitation winding Wf Field winding Wf1 First field winding Wf2 Second field winding L Load C Capacitor I Rotor core r Resistance for preventing reverse voltage D, D 'diode
1 Rotor core
1a, 1b 1st and 2nd magnetic pole part 2 Initial exciting magnet 3 Bobbin 3A, 3B Half part 3a Butt wire 301, 302 1st and 2nd coil winding part 301a Coil winding body part 301b, 301c ridge part 302a Coil winding drum portion 302b, 302c collar 303 coupling portion 304, 304 'first and second pocket portions 304a inner side wall portion 304b outer side wall portion 305 groove portion 306 groove portion 307 notch 308 locking groove or hole 4 , 4 'case 401 locking projection 5 printed circuit board 6 heat sink 7 diode chip 8 exterior 8a groove 9 terminal 10 lead terminal 11 terminal fitting 12 resin 13 terminal 15 rotating shaft 16 bearing

Claims (1)

A stator in which an output winding and a capacitor excitation winding are wound around the stator core, and a field winding is wound around the rotor core via a bobbin, and diodes are placed at both ends of the field winding. And a bobbin provided with a pocket portion that is open to the axial end portion of the rotor, and a case is detachably fitted in the pocket portion, and a printed circuit board is placed in the case. Is disposed and fixed, the diode is connected to the printed circuit board, a terminal fitting connected to the printed circuit board is led out of the case, and a terminal portion of the field winding is outside the case In the capacitor compensated synchronous generator connected to the terminal fitting,
An end of the terminal fitting is bent and protrudes from the side surface of the case to the outside of the bobbin, and a terminal portion of the field winding is connected to the end of the terminal fitting outside the bobbin. Capacitor-compensated synchronous generator.

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