JP2003079115A - Thin-type flat polyphase induction-type rotating machine for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thin-type flat rotating machine for vehicle which is short in its axial direction, produces larger torque, is superior in the cooling capabilities of coil portions at the same time, and does not need a larger excitation current in addition, even if the length of its air gap is long. SOLUTION: This is a polyphase induction-type rotating machine which is mounted on a vehicle aiming to start an engine mounted on the vehicle or to assist the running of the vehicle, and is operated by a battery and semiconductor devices. In the polyphase induction-type rotating machine whose relation especially among the number P of poles of the rotating machine, a diameter D of the air gap portions between the stator and the rotor, and the axial length L of the rotor core is approximately πD/P>L, stator windings 5 are toroidally wound on the stator core 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction rotating machine for a vehicle, which is directly connected to an output shaft of the engine and is driven by a battery and a semiconductor element for the purpose of assisting starting of the engine or running of the vehicle. The present invention relates to a thin flat induction rotating machine for a vehicle, which has a thin and flat layout due to being mounted on the vehicle.

[0002]

2. Description of the Related Art A rotating machine which is directly connected to an output shaft of an engine and is mounted on a vehicle for the purpose of assisting starting of the engine or traveling of the vehicle and driven by a battery and a semiconductor element is disclosed in, for example, Japanese Patent Laid-Open No. 10-68374. Proposed in the gazette.

However, in the rotating machine proposed in this publication, there is no particular ingenuity in the structure of the rotating machine, and when the rotating machine is connected to the output shaft of the engine, the size in the axial direction is the same as that of the rotating machine. Expanding. Therefore, it becomes longer in the axial direction by the amount of the rotating machine, and it is necessary to change the layout for mounting on the vehicle due to dimensional restrictions.

Then, in order to realize a thin and flat rotating machine against such a restriction on the arrangement in the axial direction, concentrated winding as described in, for example, Japanese Patent Laid-Open No. 7-1975. A method using a permanent magnet type rotating machine having a stator has been proposed. However, the permanent magnet type rotating machine has a possibility that the magnet may be demagnetized when an excessive current flows through the stator winding at high temperature, and the amount of magnetic flux of the rotor is constant. Depending on the number, the iron loss generated in the stator increases, and it is difficult to disassemble and assemble due to the magnetic attraction between the rotor and the stator. New challenges arise.

On the other hand, although the induction type rotating machine is robust, it requires a stator winding in which a plurality of turtle-shaped coils are arranged, and the coil end portion overhangs greatly, which deteriorates the vehicle mountability. In order to reduce the size of the coil end portion of the distributed winding stator, the number of poles may be reduced to reduce the coil length. However, the induction rotary machine having a gap of 0.5 mm or more and a relatively large air gap length. If the number of poles is increased, the exciting current will increase and the power factor will drop extremely. Therefore, 42V
When a low-voltage battery such as a power system is mounted on a vehicle and hybrid running or idle stop operation is planned at low cost, the increase in the current due to the reduction of the power factor of the rotating machine is caused by the internal resistance of the battery or the inverter. There is also a problem that the loss due to

Further, in general, a large torque of 100 Nm or more is required on the engine shaft in order to instantly start the engine by the rotating machine without producing harmful gas. for that reason,
If the engine is frequently started due to traffic congestion, another problem that the heat generation of the rotating machine part, especially the coil part becomes serious will occur. And the ambient temperature inside the engine room is 100.
A rotating machine having excellent cooling performance for the coil portion is required because the temperature becomes as high as about 100 degrees.

[0007]

With respect to such a background, all of the fact that the axial direction is short and the torque is great, the coil portion is also excellent in cooling property, and the exciting current is small even if the gap length is large, at the same time. A satisfying thin flat induction rotating machine for vehicles has not yet been realized.

The present invention has been made in order to solve the above-mentioned problems, and is short in the axial direction and has a large torque, and at the same time is excellent in the cooling property of the coil portion. Further, even if the air gap length is large, the exciting current is large. The object is to obtain a thin flat induction rotating machine for a small number of vehicles.

[0009]

A thin flat multiphase induction rotating machine for a vehicle according to the present invention is mounted on a vehicle for the purpose of assisting the start of an engine mounted on the vehicle or the traveling of the vehicle, and a battery and a semiconductor. In a multi-phase induction type rotating machine driven by elements, the relationship among the number of rotating machine poles P, the diameter D of the gap between the stator and the rotor, and the length L of the rotor core in the axial direction is approximately πD / In a multi-phase induction rotating machine having a relationship of P> L, a stator winding is wound around the stator core in a toroidal shape.

Further, in the inner rotor type multi-phase induction rotating machine in which the rotor is arranged on the inner peripheral side of the stator, a non-magnetic metal shield member is arranged on the outer peripheral surface of the stator core. The stator winding is wound around the stator core and the shield member.

Further, in the outer rotor type multi-phase induction rotating machine in which the rotor is arranged on the outer peripheral side of the stator, a shield member made of a non-magnetic metal is arranged on the inner peripheral surface of the stator core. The stator winding is wound around the stator core and the shield member.

Further, a slot for winding the stator winding is formed on the stator core, and a slot for winding the stator winding is also formed on the shield member.

The shield member also serves as fixing means for fixing the stator to the vehicle.

The element wire of the stator winding is a flat conductor wire.

An end plate made of a non-magnetic metal is closely attached to at least one of both axial end portions of the stator core, and the stator winding is wound by surrounding the end plate. There is.

Further, the shield member is provided with a flow path for circulating the cooling water.

A second shield member made of non-magnetic metal is further provided on the opposite side of the shield member from the rotor, and the second shield member also serves as a fixing means for fixing the stator to the vehicle. The second shield member is provided with a flow path for circulating the cooling water.

Further, the shield member is aluminum or an alloy containing aluminum as a main material.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. FIG. 1 is a schematic diagram showing a state in which a conventional induction rotating machine is mounted on a vehicle. In FIG. 1, 1 is an engine, 2 is an output shaft that transmits power to tires directly or through a speed reducer, a clutch mechanism, etc., 3 is a rotor of an induction rotary machine attached to the output shaft 2, and 4 is a rotor. 3 is a stator of the induction rotating machine that faces 3 through a gap g.

Windings 5 divided into two or more phases are arranged in the slots of the stator 4. Three phases are often used as the number of phases of the winding 5. The winding 5 generates a traveling magnetic field in the air gap to induce an induced current in a cage conductor provided in the rotor 3, and causes an electromagnetic force to act between the rotor 3 and the stator 4.

When the induction motor shown in FIG. 1 is of a general winding type, the coil end portion 6 becomes longer in the axial direction, the axial dimension l of the rotating machine becomes longer, and the arrangement of the vehicle is limited. On the other hand, it is difficult to install a rotating machine.

FIG. 2 is a front view of a conventional hexagonal winding type induction rotating machine. A conventional method for reducing the coil end will be described with reference to FIG. FIG. 2 shows a part of the winding 5 (one winding). After axially penetrating the slot 9a formed in the stator core 8 of the stator 4, the winding 5 crosses five slots in the circumferential direction as indicated by an arrow A, and then another slot 9b. Has been inserted into and penetrated. The length of the coil end 5a formed by straddling the slots in this way is usually D, the rotor diameter (the diameter of the gap between the stator and the rotor) of the rotating machine, and p, the number of poles. Then, the coil winding has a pole pitch,
Considering that one crossover portion is required per slot, it is approximately πD / p. Therefore, in order to reduce the length of the coil end portion 5, either the rotor diameter D is reduced or the pole number p is increased.

When the rotor diameter D is reduced, the output of the rotating machine is reduced, so that the pole number p is designed to be large and multi-pole. However, in the case of an induction type rotating machine, the reactive current required for excitation increases substantially in proportion to the number of poles, and therefore the power factor of the rotating machine decreases when the number of poles is increased. Therefore, multipolarization is 4 to 1
It is desirable to keep it within the range of about 0 poles.

Next, the structure of the present invention for solving this problem will be described. FIG. 3 is a front view of a main part of the thin flat multiphase induction rotating machine for a vehicle according to the first embodiment of the present invention. FIG. 4 is FIG.
FIG. 4 is a side sectional view of a main part taken along line IV-IV of FIG. In the present embodiment, the winding 5 has a stator core 8 as shown in the figure.
It is wound in a toroidal shape (annular / gram ring shape). Therefore, the length of the coil end does not depend on the number of poles but depends on the axial length L, which is the axial thickness of the stator core 8. And at least to make 1 slot 1 turn,
A coil end having a length L or more in the axial direction of the rotor core is required.

On the other hand, since the length of the conventional coil-end type coil end is πD / p as described above, π
If D / p> L, the rotating machine wound in a toroidal shape has a shorter coil end length, which is an advantageous design.

Taking specific dimensions as an example, the flywheel diameter is 200 to 300Φ and the axial length is 20 to 40 m.
When the rotor 3 is also used as a flywheel, the outer diameter of the rotor follows this. The number of poles is in the range of 2 to 10 poles. In these ranges, if the coil end is smaller than the power factor,
For example, when Φ200 and 10 poles are selected, the minimum distance between the coil ends of the hexagonal winding is π × 200/10 = 6.
It becomes 2.8 mm.

On the other hand, the length L of the rotating machine in the axial direction of the iron core is 50 mm.
In the case of the following, the coil end of the toroidal type becomes shorter, and there is an effect that the coil end can be made thinner and the resistance can be reduced.

More specifically, in the case of the hexagonal winding, when winding at a pitch smaller than the pole pitch, the coil ends can be formed to be slightly smaller, but it is necessary to prevent the three-phase coils from crossing each other. Since the coil end portions are arranged so as to overlap each other in the axial direction, the coil end portion further increases in size, which is more disadvantageous in terms of thinning.

On the other hand, in the case of the toroidal system, in addition to such a situation, it is possible to reduce the number of poles to less than 10 to improve the power factor of the rotating machine, which is more advantageous in reducing the current of the rotating machine. Therefore, the effect of toroidalization is further increased.

Next, the detailed structure of the thin flat multiphase induction rotating machine for a vehicle according to this embodiment will be described. On both axial end faces of the stator core 8, thin plate-shaped magnetic shield end plates 10 made of copper or aluminum are closely arranged. Further, a shield member 11 made of copper or aluminum is provided on the outer peripheral surface of the stator core 8. The shield member 11 has both the function of a magnetic shield and the function of holding the winding 5 at the outer peripheral portion.

The shield member 11 for the magnetic shield has an action of reducing the leakage magnetic flux at the coil end portion indicated by the arrow B in the figure by the shield action by the eddy current. As a result, there is an effect that a reduction in power factor due to leakage magnetic flux to the outer peripheral side, which is a problem in the toroidal winding, can be reduced, and an induction type rotating machine with a high power factor can be obtained.

The shield member 11 has a substantially cylindrical shape and its inner peripheral surface is in close contact with the stator core 8. A slot 11a is formed on the outer peripheral portion. The winding 5 includes the slot 8 a formed in the stator core 8 and the shield member 1
It is wound around both slots of one slot 11a. Therefore, the shield member 11 also has a function of holding the coil on the outer peripheral side at the time of winding, and the workability which is a problem in the toroidal winding is improved, so that there is also an effect that an induction type rotating machine having a high space factor can be provided. .

Further, when a hexagonal winding as shown in FIG. 2 is to be manufactured with a rectangular wire, it is difficult to mold the coil end, so that it has only been used in some large induction rotating machines. (When using a rectangular wire in the tortoise shell winding, it is necessary to bend in the plate width direction or twist the winding). But,
In the case of the toroidal winding proposed in the present embodiment, since the winding direction of the toroidal is bending in the plate thickness direction of the rectangular wire, coil end molding can be easily performed and a thin flat copper wire can be used for the winding 5. It can be used. The use of the rectangular wire in the toroidal winding method has an effect that the workability of performing the aligned winding is improved as compared with the round wire, so that it is possible to provide an induction type rotating machine excellent in mass productivity. Further, the space factor of the conductor with respect to the slot is improved and the primary resistance can be reduced. Therefore, even if a large current is passed with high efficiency, the voltage drop due to the resistance is small, and the semiconductor element capacity of the power source for driving the rotating machine can be reduced.

Embodiment 2. FIG. 5 is a front view of a main part of a thin flat multiphase induction rotating machine for a vehicle according to a second embodiment of the present invention. FIG. 6 is a side sectional view of the main part taken along the line VI-VI of FIG. In the present embodiment, in addition to the configuration of the first embodiment, the outer shield member 1 as the second shield member
3 is provided. The outer shield member 13 is made of copper or aluminum and has a cylindrical shape. After the winding 5 is wound around the stator core 8 and the shield member 11, the outer shield member 13 is fixed to the outer peripheral portion of the shield member 11 by crimping or screwing. To be done.

By dividing the shield member into two as in the present embodiment, the workability of the winding work is improved and at the same time,
The outer peripheral portion of the stator 4 has an integrally cylindrical shape with no unevenness, which has the effect of facilitating holding when mounted on a vehicle and incorporation into other parts.

Further, the outer shield member 13 has a structure shown in FIG.
As shown in, the flow path 14 for circulating the cooling water is formed over the entire circumference in the circumferential direction. The coil end is cooled by circulating water or oil through the flow path 14. In the structure of the conventional liquid-cooled induction type rotating machine, the winding 5 is passed through the cooling flow path, the frame, and the stator core 8.
However, in the present embodiment, the coil end is in direct contact with the outer shield member 13 due to the toroidal winding, and in addition, heat conduction to the outer shield member 13 is caused. By using aluminum or copper, which has a high rate, the cooling efficiency is high and the current flowing through the coil can be increased. In addition, since the cooling effect is high, the degree of increase in coil resistance due to coil heat generation is small. Therefore, even when a large current is applied, the temperature rise is small, at the same time the voltage drop due to the increase in resistance is small, and it is possible to maximize the use of the battery power supply capacity and generate a large torque.

Embodiment 3. FIG. 7 is a front view of a main part of a thin flat multi-phase induction rotating machine for a vehicle according to a third embodiment of the present invention. In addition to the configuration of the first embodiment, the present embodiment
A channel 15 is formed through the shield member 11 in the axial direction to allow the cooling water to flow therethrough. Since the flow path 15 is formed in the axial direction, it is possible to use oil and water circulating in the engine, the transmission, etc. for cooling.

In addition to the flow path 15, if a through hole 16 for connecting to other parts such as an engine when mounted on a vehicle is provided, it can be used as a bolt hole or the like, which facilitates layout design when mounted on a vehicle.

Fourth Embodiment FIG. 8 is a schematic diagram showing a state in which a thin flat multiphase induction rotating machine for a vehicle according to Embodiment 4 of the present invention is mounted on a vehicle. In the present invention, the induction type rotating machine is used and no expensive magnet is used as compared with the magnet type rotating machine, so that the cost can be reduced. Further, even when a large torque is generated at a low speed instant, there is no problem such as demagnetization of the magnet due to the magnetomotive force of the stator winding. Further, since there is no force such that the rotor 3 is sucked by the stator 4 when disassembling and assembling the vehicle, the assembling workability is excellent and the disassembly and maintenance are easy. Further, when the control power supply is cut off, the terminal voltage is almost zero, so that the control power supply is not destroyed. Furthermore, since the amount of magnetic flux can be controlled, the low-speed large torque and the high-speed low iron loss can be achieved at the same time even when the power source is restricted.

Even if an attempt is made to construct a hybrid type vehicle using an induction type rotating machine that takes advantage of the features that are not present in the permanent magnet type, it is necessary to arrange both the rotating machine and the engine in a narrow engine room. Although there are severe restrictions, a multi-pole design is inevitable for mounting a general tortoise-winding type induction motor. However, in the present invention, the coil end is small even when designed with small poles such as 2, 4, and 6 poles. Since it can be made thin, it has excellent mountability even if there are restrictions on the placement in the axial direction. At the same time, since the coil end is thin and the resistance is small, the voltage loss is small even when a large current is applied. Further, when the flow path 14 is formed in the outer shield member 13, the winding portion is excellent in cooling property and the capacity can be increased by increasing the current density. Due to the above features, there is an effect that an optimum induction type rotating machine can be provided especially for a hybrid vehicle that is directly connected to an engine shaft.

Embodiment 5. FIG. 9 is a schematic diagram showing a state in which a thin flat multiphase induction rotating machine for a vehicle according to a fifth embodiment of the present invention is mounted on a vehicle. In the fourth embodiment, the rotor is on the inner peripheral side and the stator is on the outer peripheral side. In the present embodiment, the stator 24 is arranged on the inner peripheral side of the rotor 23. The stator 24 has a stator core 28, and an outer shield member 33 is closely fixed to the outer peripheral surface of the stator core 28. The winding 5 is wound around the stator core 28 and the outer shield member 33 in a toroidal shape. A flow path 34 is formed in the outer shield member 33 in the circumferential direction.

In the rotating machine configured as described above,
The coil end portion is located on the inner peripheral side of the rotating machine. In the case of a large-diameter rotating machine, since the space on the inner circumference is vacant, by disposing this partial coil end, a large rotating machine outer diameter unnecessary compared to the inner rotor type rotating machine of the fourth embodiment is provided. There is an effect that it can be avoided.

[0043]

The thin flat multi-phase induction type rotating machine for a vehicle according to the present invention is mounted on a vehicle for the purpose of assisting the starting of the engine mounted on the vehicle or the running of the vehicle, and is driven by a battery and a semiconductor element. In the multi-phase induction rotating machine, the relation among the number of poles of the rotating machine P, the diameter D of the gap between the stator and the rotor, and the axial length L of the rotor core is about πD / P> L. In a related multi-phase induction rotating machine, a stator winding is toroidally wound around a stator core. Therefore, it has the following effects as compared with the magnet rotating machine. That is, since an expensive magnet is not used, the cost can be reduced. In addition, there is no problem such as demagnetization of the magnet when a large torque (= large current) is generated instantaneously at a low temperature at a high temperature. Also, when disassembling and assembling the rotating machine, the rotor has no force to be sucked into the stator, resulting in excellent workability. Further, when the control power supply is cut off, the terminal voltage is almost zero, so that the control power supply is not destroyed. In addition, the amount of magnetic flux can be controlled and controlled, and it is possible to achieve both low-speed large torque and high-speed low iron loss even when there is a power supply restriction. Furthermore, the following effects are obtained in comparison with a general hexagonal winding type induction motor. That is, the coil end can be made thin even when the design is made with a large diameter and a small pole, and the mountability is excellent even when there is an arrangement restriction in the axial end direction. As a result, the number of poles can be reduced and the exciting current can be reduced. That is, the power factor of the rotating machine is high and the current amount of the stator is small.

Further, in the inner rotor type multi-phase induction rotating machine in which the rotor is arranged on the inner peripheral side of the stator, a non-magnetic metal shield member is arranged on the outer peripheral surface of the stator core. The stator winding is wound around the stator core and the shield member. Therefore, the leakage magnetic flux can be reduced by the magnetic shield effect of the shield member.

Further, in the outer rotor type multi-phase induction rotating machine in which the rotor is arranged on the outer peripheral side of the stator, a non-magnetic metal shield member is arranged on the inner peripheral surface of the stator core. The stator winding is wound around the stator core and the shield member. Therefore, the leakage magnetic flux can be reduced by the magnetic shield effect of the shield member.

Further, a slot for winding the stator winding is formed on the stator core, and a slot for winding the stator winding is also formed on the shield member. Therefore, since the stator winding is held by the shield member and the stator winding is stabilized, the rotating machine with high reliability can be obtained.

The shield member also serves as a fixing means for fixing the stator to the vehicle. Therefore, since the shield member also serves as the fixing means, high performance can be achieved and the number of parts can be reduced and the cost can be reduced. Further, in the outer rotor type rotating machine, the shield member as the fixing means can be arranged on the inner peripheral side of the rotating machine, and the outer diameter of the rotating machine can be reduced.

The element wire of the stator winding is a rectangular conductor wire. In the toroidal winding, since the coil bending direction is the radial direction, the winding property can be improved by using a flat conductor wire. Furthermore, the space factor of the winding in the slot can be increased.

Further, an end plate made of a non-magnetic metal is disposed in close contact with at least one of both axial end portions of the stator core, and the stator winding is wound so as to surround the end plate. There is. Therefore, the leakage magnetic flux can be further reduced by the magnetic shielding effect of the non-magnetic metal.

Further, the shield member is provided with a flow path for circulating the cooling water. In a normal hexagonal winding, the heat generated in the coil is transmitted to the frame via the iron core and the frame is water-cooled. That is, it is cooled by the heat path of coil → iron core → frame → water. Alternatively, the coil ends are blown with air to be cooled. On the other hand, in the rotating machine of the present invention, the heat generated in the stator winding is transmitted to the shield member, and the shield member is cooled, so that the stator winding → shield member → water heat is generated. Since the path is formed and the heat transfer surface is small, efficient cooling can be achieved.

A second shield member made of non-magnetic metal is further provided on the side of the shield member opposite to the rotor, and the second shield member also serves as a fixing means for fixing the stator to the vehicle. The second shield member is provided with a flow path for circulating the cooling water. Therefore, since the shield member also serves as the fixing means, the performance is improved, the number of parts can be reduced, the cost can be reduced, and the cooling can be efficiently performed.

Further, the shield member is aluminum or an alloy containing aluminum as a main material. Therefore, the thermal conductivity can be further improved. Further, since the electric resistance is relatively small, the shielding effect is enhanced and the weight can be further reduced.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a state in which a conventional induction rotating machine is mounted on a vehicle.

FIG. 2 is a front view of a conventional hexagonal winding type induction rotating machine.

FIG. 3 is a front view of a main part of the thin flat multiphase induction rotating machine for a vehicle according to the first embodiment of the present invention.

FIG. 4 is a side sectional view of a main part taken along the line IV-IV in FIG.

FIG. 5 is a front view of a main part of a thin flat multiphase induction rotating machine for a vehicle according to a second embodiment of the present invention.

6 is a side sectional view of a main part taken along line VI-VI in FIG.

FIG. 7 is a front view of a main part of a vehicle thin flat multiphase induction rotating machine according to a third embodiment of the present invention.

[Fig. 8] Fig. 8 is a schematic diagram showing a state in which the thin flat multiphase induction rotating machine for a vehicle according to the fourth embodiment of the present invention is mounted on a vehicle.

[Fig. 9] Fig. 9 is a schematic diagram showing how a thin flat multiphase induction rotating machine for a vehicle according to a fifth embodiment of the present invention is mounted on a vehicle.

[Explanation of symbols]

1 engine, 3,23 rotor, 4,24 stator,
5 stator winding, 8, 28 stator core, 8a slot, 10 end plate, 11 shield member, 11a slot, 13, 33 outer shield member (second shield member), 14, 34 flow path.

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 5H002 AA02 AA03 AA06 AA09 AB06                       AB08 AD02 AE08                 5H013 FF01 FF03 LL00 NN08                 5H603 AA01 BB01 BB08 BB12 BB13                       CA01 CA05 CB01 CB26 CC00                       CC17 CD01 CD21 CE01

Claims (10)

[Claims] 1. A multi-phase induction rotating machine mounted on a vehicle for the purpose of assisting the start of an engine mounted on the vehicle or the traveling of the vehicle, which is driven by a battery and a semiconductor element, and particularly, the number of poles of the rotating machine. P, the diameter D of the gap between the stator and the rotor, and the length L of the rotor core in the axial direction of the rotor have a relationship of approximately πD / P> L. A thin flat multiphase induction rotating machine for a vehicle, which is wound around a stator core in a toroidal shape. 2. An inner rotor type multi-phase induction rotating machine in which the rotor is arranged on the inner peripheral side of the stator,
A non-magnetic metal shield member is disposed on an outer peripheral surface of the stator core, and the stator winding is wound so as to surround the stator core and the shield member. Item 2. A thin flat multiphase induction rotating machine for a vehicle according to Item 1. 3. An outer rotor type multi-phase induction rotating machine in which the rotor is arranged on the outer peripheral side of the stator,
A shield member made of a non-magnetic metal is disposed on the inner peripheral surface of the stator core, and the stator winding is wound so as to surround the stator core and the shield member. A thin flat multiphase induction rotating machine for a vehicle according to claim 1. 4. A slot for winding the stator winding is formed on the stator core, and a slot for winding the stator winding is formed on the shield member. Claim 2 or 3 characterized in that
Thin flat multi-phase induction type rotating machine for vehicles as described in. 5. The thin flat multi-phase induction rotating machine for a vehicle according to claim 2, wherein the shield member also serves as a fixing means for fixing the stator to the vehicle. 6. The thin flat multi-phase induction rotating machine for a vehicle according to claim 1, wherein the element wire of the stator winding is a rectangular conductor wire. 7. A non-magnetic metal end plate is closely attached to at least one of both axial end portions of the stator core, and the stator winding is wound so as to surround the end plate. The thin flat multiphase induction rotating machine for a vehicle according to any one of claims 1 to 6, which is rotated. 8. The thin flat multi-phase induction rotating machine for a vehicle according to claim 2, wherein the shield member is provided with a flow path for circulating cooling water. 9. A second shield member made of a non-magnetic metal is further provided on the side of the shield member opposite to the rotor, and the second shield member is a fixing means for fixing the stator to the vehicle. 9. The thin flat multiphase induction type for vehicle according to claim 2, wherein the second shield member is also provided with a flow path for circulating cooling water. Rotating machine. 10. The thin flat multi-phase induction rotating machine for a vehicle according to claim 2, wherein the shield member is made of aluminum or an alloy containing aluminum as a main material.