JP2013027252A - Starter generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a starter generator which can obtain a highly accurate rotational position signal, improve the reliability of a magnetic sensor, and reduce manufacturing costs.SOLUTION: A starter generator comprises: a rotor 1 having a rotor magnet mounted in a ring form inside a yoke part; and a stator 20 including a plurality of salient poles 21 which are statically disposed inside the rotor 1, each having a power generation coil 23 wound around a stator core 22. The rotation position of the rotor 1 is detected by a magnetic sensor 14 attached to the stator 20, and a detection signal thereof is output. The magnetic sensor 14 is mounted on a circuit board 12 inside a circuit board case 11 attached to the stator 20. A magnetic body guide piece 13 having its ends arranged facing each other relative to the magnetic sensor 14 is inserted from the circuit board case 11 into a space between the stator cores 22 of the respective salient poles 21 of the stator 20 for disposition therein.

Description

  The present invention relates to a starter generator mounted on an engine such as a motorcycle and used for starting the engine, igniting, and charging a mounted battery.

  A starter / generator mounted on an engine such as a motorcycle basically has a rotor formed in a cup shape having a boss portion at the center, and a plurality of starter / generators along the inner side of a yoke portion forming an outer peripheral wall thereof. An annular rotor magnet formed in a divided manner is mounted, a stator is arranged on the inner side of the rotor, and a plurality of magnetic pole portions around which a power generation coil is wound are arranged radially, and the boss portion of the rotor is the engine crank. It is fitted and fixed to the shaft.

  In addition, since this type of starter generator is used as a starter brushless motor when starting the engine, for example, to generate a rotational position signal for a motor driver as described in Patent Document 1 below. In addition, a rotation position detection sensor may be provided, and an ignition timing detection sensor may be provided to generate an ignition timing reference signal indicating the ignition timing of the engine.

  However, a starter generator having such a rotation detection sensor has a rotation position detection sensor and an ignition timing detection sensor attached to the inner peripheral portion of the stator, and faces the rotation detection sensor so as to face the rotor boss. An annular magnet for detecting the rotational position is provided on the peripheral surface of the part, and an annular magnet for detecting the ignition timing is further provided facing the ignition timing detecting sensor. For this reason, the number of parts such as magnets increases, the axial thickness of the rotor and the stator increases, and an accurate rotational position signal and ignition timing due to errors in the magnetized position of the annular magnet, etc. There has been a problem that signal detection is easily disturbed.

JP 2003-148317 A JP 2009-89588 A

  Therefore, conventionally, a starting generator that generates a rotational position signal and an ignition timing signal by using a rotor magnet and a magnetic sensor without providing an annular magnet for detecting a rotational position and an annular magnet for detecting an ignition timing is disclosed in the above patent. It is proposed by Document 2 etc. The starter generator is provided with a plurality of notch recesses in a stator core of a stator, and a magnetic sensor is inserted into the notch recesses in order to detect the switching of magnetic flux in the magnet of the rotor with a magnetic sensor. A magnetic pole portion having the same polarity as that of an adjacent magnet is provided in a part of the one magnet, and an ignition timing detection signal is generated by the magnetic pole portion and a magnetic sensor facing the magnetic pole portion.

  However, in this starting generator, a plurality of magnetic sensors are inserted into a plurality of deep recesses provided in the stator core of the stator, and the circuit board holding the magnetic sensor is located above the recesses (outside the stator cores). ). For this reason, the magnetic sensor is attached with its lead wire leg lengthened, and the magnetic sensor having a long lead wire leg portion is shaken by the vibration generated by the engine, which reduces the reliability of the magnetic sensor. there were.

  In addition, since the stator core of the stator is provided with a notch recess for inserting a magnetic sensor, the magnetic characteristics of the stator are likely to deteriorate. Further, when forming a notch recess for manufacturing a generator, There was a problem that a mold was required and the manufacturing cost was high.

  The present invention has been made in view of the above points, and is capable of obtaining a highly accurate rotational position signal and the like, improving the reliability of the magnetic sensor, and reducing the manufacturing cost. The purpose is to provide.

  In order to achieve the above object, the starter generator of the present invention has a boss portion at the center, a yoke portion is formed on the outer peripheral wall of the rotor body formed in a cup shape, and a rotor magnet is mounted inside the yoke portion. And a stator having a plurality of salient pole portions that are disposed inside the rotor and are wound around a stator core, and a plurality of magnetic sensors attached to the stator In the starter generator that detects the rotational position of the rotor and outputs a detection signal thereof, the plurality of magnetic sensors are mounted on a circuit board in a board case attached to the stator, and the end portions thereof are opposed to the magnetic sensors. The magnetic material guides arranged in this manner are attached to the substrate case so as to be inserted into the gaps between the stator cores of the respective salient pole portions of the stator, and the rotor magnet of the rotor has magnetic poles of different poles. Are alternately arranged in a ring shape, and a second magnetic pole portion having a magnetic pole different from the magnetic pole portion is formed at one end of the magnetic pole portion, and a magnetic field of one of the plurality of magnetic sensors is formed. The length of the guide facing the sensor is formed as a short guide so as to reach only the second magnetic pole, and all the other guides are separated from the second magnetic pole in each magnetic pole. It is formed by bending in a crank shape so as to approach.

  According to the present invention, a magnetic flux change due to the switching of the magnetic poles accompanying the rotation of the rotor is applied to the magnetic sensor through the guide so that the rotational position is detected. Because it is mounted, there is no need to lengthen the lead legs of the magnetic sensor, the magnetic sensor can be stably mounted on the board, and deterioration of reliability due to vibration of the magnetic sensor due to engine vibration is prevented. Can do.

  Furthermore, since the magnetic sensor is housed in a substrate case that is not easily affected by the heat of the stator, it is possible to prevent performance deterioration due to the heat effect of the magnetic sensor, and in addition, a relatively inexpensive magnetic sensor for mounting can be provided. Since it can be used, the manufacturing cost can be reduced.

  Also, since only the guide element needs to be inserted into the gap between the stator cores of each salient pole part of the stator from the bottom of the substrate case, it is necessary to provide a special notch recess for arranging the magnetic sensor in the stator core as in the prior art. This eliminates the need for a mold for forming a notch recess, thereby reducing the mold cost during production and reducing the production cost.

  Furthermore, all the guides except the short guides are bent in a crank shape so as to approach each magnetic pole part in a state of being separated from the second magnetic pole part, so that magnetism is detected via these guides. The rotation position signal of the rotor can be accurately generated by the detecting operation of the magnetic sensor, and when the second magnetic pole portion of the rotor magnet reaches the position of the short guide, the short guide has a magnetic flux. By utilizing the fact that no change in switching occurs, a low level signal or a high level signal continuous between the magnetic pole portions of adjacent rotor magnetic poles can be generated as the ignition timing detection signal when the rotor rotates.

  Here, in the starter generator configured as described above, it is preferable that the end portions of the guide element and the short guide element are arranged with a slight gap with respect to the magnetic sensors. According to this, since a slight gap is provided between each magnetic sensor and the guide and the short guide, vibration load, static electricity, etc. of the guide and the short guide are not applied to the magnetic sensor. The destruction of the magnetic sensor can be prevented.

  In addition, the guide and the short guide are attached so that the lower ends of the guide and the short guide protrude downward from the inside of the substrate case, and a guide cover portion for covering the guide and the short guide is provided below the substrate case. The guide cover portions can be inserted into the gaps between the stator cores of the respective salient pole portions of the stator. According to this, the guide and short guide of each magnetic sensor can be mounted accurately and stably in the gap between the stator cores of each salient pole part.

  In addition, the guide and the short guide are formed from a belt-like metal plate made of a magnetic material, and a wide upper end is formed at the upper end, and a flat end surface of the wide upper end is mounted on the circuit board in the board case. The magnetic sensor can be disposed to face the magnetic sensor. According to this, each magnetic sensor can detect the rotation position of the magnetic pole portion of the rotor magnet via the guide and the short guide having a relatively simple structure, and can generate a rotation detection signal.

  Moreover, it is preferable that a terminal is attached to the board case, one end of the terminal is connected to the circuit board, and the other end of the terminal protrudes outside the board case. According to this, the wire harness for outputting a detection signal can be easily connected outside the board case, and workability when assembling components such as the board case can be improved.

  According to the starter generator configured as described above, a highly accurate rotational position signal and the like can be obtained, the reliability of the magnetic sensor can be improved, and the manufacturing cost can be reduced.

It is a front view of the starter generator which shows one Embodiment of this invention. It is a center sectional view of a starter generator in the state where it was attached to the crankshaft of an engine. It is a partial expanded sectional view which shows the positional relationship of a stator core, the magnetic sensor in a substrate case, a guide, and a short guide. It is a partial expanded sectional view of a substrate case and a guide. It is a partial expanded sectional view of a substrate case and a short guide. It is the disassembled perspective view which looked at the circuit board of the magnetic sensor, the guide, and the board case from the lower side. It is the disassembled perspective view which looked at the circuit board of the magnetic sensor, the guide, and the board case from the upper side. It is explanatory drawing which shows the positional relationship with the magnetic pole part of a rotor magnet, a 2nd magnetic pole part, a guide, and a short guide. It is a timing chart which shows a rotation position detection signal and an ignition timing signal.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a front view of the starter generator, and FIG. 2 shows a central longitudinal sectional view thereof. The rotor 1 has a boss part 3 in the center, and a yoke part 2 is provided so as to surround the outer periphery of the rotor 1 to form a cup. The yoke part 2 and the boss part 3 are made of a magnetic metal, for example, Manufactured by hot forging and cutting.

  The central boss portion 3 of the rotor 1 is formed with a taper hole that fits into the crankshaft 9 of the engine, and a flat fastening seating surface is formed at the tip of the boss portion 3, inside the yoke portion 2. For example, an arc-shaped rotor magnet 4 divided into four parts is annularly arranged. The rotor magnet 4 arranged in an annular shape is held at a predetermined position via a spacer inside the yoke part 2, and a cylindrical protective cover 5 is fitted inside the yoke part 2, and formed at the end of the yoke part 2. The caulking portion is caulked inward and fixed in place.

  One rotor magnet 4 is formed in a planar arc shape with an angular width of 90 degrees, for example, and three magnetic pole portions 4a are formed with a width of 30 degrees, and adjacent magnetic poles are N · S · N or S -It is magnetized so that it may become a mutually different magnetic pole like N * S. Accordingly, the rotor magnet 4 of the rotor 1 is configured by arranging the 12-pole magnetic pole portions 4a in an annular shape as a whole.

  Further, as shown in FIG. 8, the rotor magnet 4 having the 12-pole magnetic pole portion 4a has one magnetic pole portion 4b at the upper end of the magnetic pole portion 4b in order to generate an ignition timing detection signal. A second magnetic pole portion 4c having a magnetic pole different from the magnetic pole portion 4b is formed. Here, an N-pole second magnetic pole portion 4c is formed at the upper end of the S-pole magnetic pole portion 4b.

  As shown in FIG. 2, the rotor 1 having the above configuration is fixed by screwing a fixing bolt or a fixing nut into the tip of the crankshaft 9 by fitting the boss portion 3 to the tip of the crankshaft 9 of the engine. When the tapered hole of the boss portion 3 of the rotor 1 is fitted into the tip of the crankshaft 9, a key attached to the outer periphery of the tapered portion of the crankshaft 9 is fitted into a key groove on the rotor side, so that the rotor 1 A predetermined angular positional relationship is set with respect to 9 and fixed.

  On the other hand, as shown in FIGS. 1 and 2, the stator 20 of the starter generator is configured by winding a power generation coil 23 around a plurality of salient pole portions 21 projecting from the outer peripheral portion of the stator core 22. . The stator core 22 is formed by laminating a plurality of steel plates punched into a shape in which a plurality of salient pole portions 21 are provided on the outer periphery of an annular yoke portion 24, and fixing them with rivets. The front end of the salient pole portion 21 in the foremost steel plate and the back steel plate is bent outwardly in a flange shape, and has a function of holding the power generation coil 23 wound around that portion. A power generation coil 23 is wound around each salient pole portion 21 of the stator core 22 by a winding machine in order for a predetermined number of turns, and the wire harness 8 is connected to the lead wire as shown in FIG.

  Further, the stator 20 includes a magnetic sensor 14 such as a Hall IC, a guide 13 and a short guide 13a in order to detect the rotational position of the rotor 1 and generate a rotational position detection signal and an ignition timing signal. The sensor unit 10 is attached at a predetermined position. As shown in FIGS. 3 to 7, the sensor unit 10 houses a circuit board 12 on which a magnetic sensor 14 is surface-mounted in a board case 11, and four guides 13 and a short guide at the bottom of the board case 11. 13a is attached corresponding to the magnetic sensor 14 and configured.

  As shown in FIGS. 1 and 2 and the like, the substrate case 11 is integrally formed in a box shape with a synthetic resin. A crack pin portion 11b for use is projected (FIG. 7). The circuit board 12 is provided with a fixing hole 12a. The fixing hole 12a is fitted into the crack pin portion 11b, and the circuit board 12 is fixed at a predetermined position in the substrate case 11.

  Further, four magnetic sensors 14 (14a, 14b, 14c, 14d) are surface-mounted on the circuit board 12, and the rotor of the rotor 1 is provided on these magnetic sensors 14 (14a, 14b, 14c, 14d). In order to detect the magnetic flux change of the magnet 4, the three guides 13 and the short guide 13a are arranged with their upper ends opposed to each other, and arranged to face the magnetic sensor 14 (14a, 14b, 14c, 14d). Each magnetic sensor 14 is mounted and held at a predetermined position on the bottom of the substrate case 11.

  In order to attach the guide 13 and the short guide 13a in a protruding manner, a slit 11c and three rectangular holes 11d are provided at a predetermined position on the bottom of the substrate case 11, and the slit 11c and the rectangular holes are provided. Four guide cover portions 15 are provided on the bottom of the substrate case 11 so as to surround 11d from below.

  As will be described later, the guide 13 and the short guide 13a are formed by bending the three guides 13 into a long crank shape, and the one guide is composed of the short guide 13a. As shown in FIG.

  As shown in FIGS. 5 and 6, the guide cover portion 15 is formed to have a substantially T-shaped cross section, a wide portion and a narrow portion, and as shown in FIG. 3, the narrow portion is The stator core 22 is inserted into a gap between the salient pole portions, and the wide portion is inserted into the gap between adjacent stator coils 22 of the stator 20.

  As shown in FIGS. 4 to 7, the short guide 13 a is inserted into the guide cover 15 from the inside of the substrate case 11 through the slit 11 c and the guide 13 is inserted through the rectangular hole 11 d. The upper ends of the guide 13 and the short guide 13a are held in opposition to the four magnetic sensors 14 that are surface-mounted on the circuit board 12 and are not shown. The substrate case 11 is filled with mold resin and fixed in place. With such a configuration, each magnetic sensor 14 (14a, 14b, 14c, 14d) in the sensor unit 10 detects a magnetic flux change accompanying the rotation of the rotor magnet 4 of the rotor 1 through the guide 13 and the short guide 13a. It is like that.

  The guide cover 15 is provided to cover the guide and protect it from interference with the stator core 22 and the like. Functionally, the guide 13 and the short guide are not used without using the guide cover. It is also possible to project 13a from the substrate case 11 as it is.

  The guide 13 and the short guide 13a are formed from a belt-like metal plate made of a magnetic material such as a belt-like steel plate, and the upper ends thereof are formed wide as a wide upper end portion 13b, and the wide upper end portion 13b is disposed opposite to the magnetic sensor 14. , Improving the magnetic detection performance. As shown in FIGS. 6 and 8, the four guide elements are formed by bending the three guide elements 13 into a long crank shape, and the one guide element is formed as a short guide element 13a and shortened in a straight line. Is done.

  That is, the rotational position of the rotor magnet 4 is detected by the magnetic sensors 14 a to 14 d provided in the sensor unit 10 via the guide 13 and the short guide 13 a, but one magnetic sensor among the plurality of magnetic sensors 14. As shown in FIG. 8, the length of one guide facing 14d is linearly formed as a short short guide 13a so as to reach only the second magnetic pole portion 4c. On the other hand, as shown in FIGS. 4 and 6, the other three guide elements 13 are moved away from the second magnetic pole part 4 c of the rotor magnet 4 so as to approach the magnetic pole parts 4 a and 4 b, that is, three. The guide element 13 is bent in a crank shape so as to draw only the magnetic flux of the magnetic pole portions 4a and 4b of the rotor magnet 4 without being affected by the magnetic flux of the second magnetic pole portion 4c.

  Thus, when the second magnetic pole portion 4c of the rotor magnet 4 reaches the position of the short guide 13a of the sensor unit 10, the magnetic sensor 14d of the short guide 13a has N · N · N as shown in FIG. Since the magnetic flux switching change does not occur as a pole, a continuous low level signal or high level signal is generated as an ignition timing signal between adjacent magnetic pole portions 4a of the rotor magnet 4 as shown in FIG. ing.

  Each of the guide 13 and the short guide 13a is inserted from the inside of the substrate case 11 into a fixed position of the slit 11c or the rectangular hole 11d at the bottom thereof, and the circuit board 12 is filled with mold resin. At the same time, it is resin-molded and fixed at a predetermined position.

  For electrical connection of the circuit board 12, as shown in FIG. 4, the terminal 16 is attached through the bottom of the board case 11, and the tip of the terminal 16 is fixed to the circuit board 12.

  When the circuit board 12 on which the guide 13, the short guide 13 a, and the magnetic sensor 14 (14 a, 14 b, 14 c, 14 d) are mounted in the board case 11, first, as shown in FIG. The short guide 13a is inserted from the inside of the board case 11 into the slits 11c and the rectangular holes 11d at the bottom thereof. Next, the circuit board 12 is horizontally placed on the guide in the board case 11, and the circuit board 12 The fixing hole 12 a is fitted into the crack pin portion 11 b in the substrate case 11. At this time, the tip of the terminal 16 in the case is connected so as to be fixed to a predetermined position of the circuit board 12 by soldering or the like. Thereafter, a mold resin is filled into the substrate case 11 and resin molding is performed.

  As a result, each guide 13 and the short guide 13a are inserted into the guide cover 15 below the slit 11c and the rectangular hole 11d at the bottom of the board case 11 and fixed at a fixed position. Each magnetic sensor 14 (14a, 14b, 14c, 14d) mounted on the lower surface of the guide is positioned and fixed directly above the wide upper end 13b of the guide 13 and the short guide 13a through a slight gap. .

  Since a slight gap is provided between each magnetic sensor 14 (14a, 14b, 14c, 14d) and the guide 13 and the short guide 13a, the vibration load, static electricity, etc. of the guide 13 and the short guide 13a are magnetic. It is not applied to the sensor 14, and the magnetic sensor 14 can be prevented from being destroyed.

  Such assembling work is performed by inserting the guide 13 and the short guide 13a into the guide cover 15 through the slit 11c and the rectangular hole 11d at the bottom of the board case 11, and placing the circuit board 12 in the board case 11. This can be easily performed by simply fitting the fixing hole 12a of the circuit board 12 into the crack pin portion 11b provided at the bottom. Then, with the terminal 16, the guide 13, the short guide 13 a and the circuit board 12 assembled in the board case 11, the board case 11 is filled with mold resin, the case is resin-molded, and the circuit board 12 is filled. Each of the magnetic sensors 14 mounted on the lower surface of each of the magnetic sensors 14 and the guide elements 13 and the short guide elements 13a facing the respective magnetic sensors 14 are securely fixed in place.

  As shown in FIG. 1, the sensor unit 10 having the above configuration is fastened and fixed to the front surface of the stator 20 (perpendicular to the crankshaft 9) by a fixing screw 17. At this time, the sensor unit 10 protrudes from the bottom of the substrate case 11. As shown in FIG. 3, each guide cover portion 15 is accurately fitted and fixed between the salient pole portion 21 and the salient pole portion 21 of the stator 20. Thereby, the guide 13 and the short guide 13 a in each guide cover portion 15 are accurately and stably inserted between the salient pole portions 21 of the stator core 22. Further, the short guide 13a mounted at a fixed position of the stator 20 reaches the magnetic pole portion 4a of the rotor magnet 4 as shown in FIG. 8 when the stator 20 is fixed to the crankcase 27 of the engine. It is arranged at a position that does not reach the end of the two magnetic pole portions 4c.

  On the other hand, a fixing hole is formed in the yoke portion 24 at the center of the stator core 22, and a fixing screw 26 is inserted into the fixing hole. The fixing screw 26 allows the stator 20 to be connected to the crankcase of the engine as shown in FIG. 27 is fixed inside. As shown in FIG. 2, the rotor 1 is fixed to the tip of the crankshaft 9 of the engine with the second magnetic pole portion 4c at a predetermined angular position. In this state, the short guide element of the sensor unit 10 is used as described above. 13a is arranged at a position that reaches the magnetic pole part 4a of the rotor magnet 4 but does not reach the end of the second magnetic pole part 4c. A detection signal wire harness 8 is connected to the outer end of the terminal 16 protruding from the bottom of the substrate case 11.

  The starter / generator configured in this manner functions as a brushless motor when the engine is started, and a current of each UVW phase is supplied to a coil of each salient pole portion 21 of the stator 20 from a motor driver (not shown), whereby the rotor At this time, the rotational position detection signal detected by the magnetic sensor 14 of the sensor unit 10 is sent to the motor driver, the starter generator is driven as a brushless motor, and the rotor 1 of the starter generator rotates. The crankshaft 9 is rotationally driven and the engine is started.

  In addition, as the engine starts, an engine control unit (not shown) receives rotational position detection signals from magnetic sensors 14a, 14b, and 14c that detect the magnetic flux of the rotor magnet 4 via the guide 13 and the short guide 13a. A reference position signal (a detection signal of the magnetic sensor 14d of the short guide 13a) is input, an ignition timing signal is generated based on the rotation position detection signal and the reference position signal, and the ignition timing control of the engine is performed. As shown in FIG. 9, the ignition timing signal at this time is generated at the timing when the rotational position detection signals of the magnetic sensors 14a, 14b, 14c and the high-level reference position signal from the magnetic sensor 14d of the short guide 13a continue. Will be.

  In this way, the magnetic flux change due to the switching of the magnetic poles accompanying the rotation of the rotor 1 is applied to the magnetic sensor 14 (14a, 14b, 14c, 14d) through the guide 13 and the short guide 13a, and the magnetic such as the Hall IC. Since the sensor 14 is surface-mounted on the circuit board 12 in the board case 11, there is no need to lengthen the lead leg portion of the magnetic sensor 14, the magnetic sensor 14 can be stably mounted on the board, and the vibration of the engine Therefore, it is possible to prevent a decrease in reliability due to the shake of the magnetic sensor 14 due to the above.

  Furthermore, since the magnetic sensor 14 (14a, 14b, 14c, 14d) is housed in the substrate case 11 that is not easily affected by the heat of the stator 20, it is possible to prevent performance deterioration due to the heat of the magnetic sensor 14, In addition, since a relatively inexpensive surface mounting magnetic sensor 14 can be used, the manufacturing cost can be reduced.

  Further, since only the guide 13 and the short guide 13a have to be inserted into the gap between the stator cores 22 of the respective salient pole portions 21 of the stator 20 from the bottom of the substrate case 11, a magnetic sensor is disposed as in the prior art. It is not necessary to provide a special notch recess in the stator core, reducing the number of processing steps during manufacturing, improving the workability of assembling parts, and reducing the manufacturing cost.

DESCRIPTION OF SYMBOLS 1 Rotor 2 Yoke part 3 Boss part 4 Rotor magnet 4a, 4b Magnetic pole part 4c 2nd magnetic pole part 5 Protective cover 8 Wire harness 9 Crankshaft 10 Sensor unit 11 Substrate case 11b Split pin part 11c Slit 11d Rectangular hole 12 Circuit board 12a fixation Hole 13 Guide 13a Short Guide 13b Wide Top 14 Magnetic Sensor 14a-14d Magnetic Sensor 15 Guide Cover 16 Terminal 20 Stator 21 Salient Pole 22 Stator Core 23 Generator Coil 24 Relay Part 27 Crank Case

Claims (5)

A rotor having a boss portion at the center and a yoke portion formed on the outer peripheral wall of the rotor body formed in a cup shape, and a rotor magnet mounted on the inside of the yoke portion;
A stator having a plurality of salient pole portions arranged stationary on the inside of the rotor and having a power generation coil wound around a stator core,
In the starting generator that detects the rotational position of the rotor by a plurality of magnetic sensors attached to the stator and outputs the detection signal,
The plurality of magnetic sensors are mounted on a circuit board in a board case attached to the stator, and magnetic guides arranged so as to face the end portions of the magnetic sensors respectively correspond to the salient pole portions of the stator. Attached to the substrate case so as to be inserted into the gap between the stator cores of
The rotor magnet of the rotor is formed by alternately arranging magnetic pole portions of different poles, and a second magnetic pole portion having a magnetic pole different from the magnetic pole portion is formed at one end of the magnetic pole portion,
The length of the guide facing one magnetic sensor of the plurality of magnetic sensors is formed as a short short guide so as to reach only the second magnetic pole part, and all the other guides are 2. A starting generator characterized by being bent in a crank shape so as to approach each magnetic pole portion in a state of being separated from the two magnetic pole portions.   The starter / generator according to claim 1, wherein ends of the guide and the short guide are arranged with a small gap with respect to the magnetic sensors.   The guide and the short guide are attached with their lower ends projecting downward from the inside of the substrate case, and a guide cover portion is provided on the lower side of the substrate case to cover the guide and the short guide. The starter generator according to claim 1 or 2, wherein the guide cover portions are inserted into the gaps between the stator cores of the respective salient pole portions of the stator.   The guide and the short guide are formed of a magnetic strip-shaped metal plate, a wide upper end is formed at the upper end thereof, and a flat end surface of the upper end is a circuit in a substrate case attached to the stator. The starter / generator according to any one of claims 1 to 3, wherein the starter / generator is disposed opposite to a magnetic sensor mounted on a substrate.   5. The starting power generation according to claim 1, wherein a terminal is attached to the board case, one end of the terminal is connected to the circuit board, and the other end of the terminal protrudes outside the board case. Machine.

Images