JP2001086676A - Rotor of permanent magnet rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start a rotor as an inductor at start, and operate it as a synchronizer at rated operation, without dropping the output as compared with a non-self- starting permanent magnet type or rotating machine. SOLUTION: This is the rotor of a permanent magnet type or rotating machine which is equipped with a rotor iron core 4 having a magnetic part and having magnetic irregularity made in circumferential direction, and a permanent magnet 7 being provided to negate the magnetic flux from an armature coil 2 passing between the adjacent magnetic poles of the rotor iron core 4. In this case, this rotor is equipped with a cylindrical conductor 8 which is provided around the rotor iron core 4 and generates starting torque by generating an induced current at start of a rotating machine, and a cylindrical retaining ring 9 which is provided around the cylindrical conductor 8 and retains the centrifugal force working on the cylindrical conductor 8 at operation of the rotating machine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a self-starting type permanent magnet type rotating electric machine which starts as an induction machine at the time of starting and operates as a synchronous machine at rated operation.

[0002]

2. Description of the Related Art FIG. 9 is a radial sectional view showing an example of the configuration of a conventional self-starting type permanent magnet type rotary electric machine of this type.

As shown in FIG. 9, a self-starting permanent magnet type rotating electric machine generally includes a stator 1 having an armature coil 2 and a rotor 3 rotating in the stator 1. ing.

[0004] The rotor 3 is not provided with a coil for forming a magnetic field, and has a rotor core 4 having a magnetic portion and having magnetic irregularities in the circumferential direction. It is composed of only a permanent magnet 7 provided to cancel magnetic flux from the armature coil 2 passing between adjacent magnetic poles of the iron core 4 and a starting cage conductor.

[0005] Therefore, as compared with the conventional wound-type rotary electric machine, the structure can be simplified, and a dedicated inverter or the like is not required at the time of starting, so that the whole system can be made inexpensive. is there.

In this type of self-starting permanent magnet type rotating electric machine, the rotor 3 has irregularities, so that the magnetic resistance is small at the convex portions and large at the concave portions.

As a result, in the gap between the protrusion and the stator on the recess, the magnetic energy stored by flowing a current through the armature coil 2 differs. An output of the permanent magnet type reluctance rotating electric machine is generated mainly by the change of the magnetic energy.

The projections and depressions are not only geometrical but also magnetically capable of forming irregularities, that is, if the magnetic resistance and the magnetic flux density are different depending on the rotational position of the rotor 3. Good.

At the time of starting the rotating electric machine, an induction current accompanying a change in the armature current is generated in a starting cage type conductor provided on the outer periphery of the rotor core 4 to start the induction machine. ing.

[0010]

As described above, the self-starting type permanent magnet type rotating electric machine has a magnetic resistance different depending on the rotational position due to the unevenness formed on the surface of the rotor core 4, and By the permanent magnet 7 provided on the side surface of the projection,
The magnetic flux leaking to the concave portion serving as the portion between the magnetic poles is reduced, and an output is obtained by the changed magnetic energy.

At the time of starting, an induction current is generated in a starting cage type conductor provided on the outer periphery of the rotor 3 in accordance with a change in the armature current, and an induction torque is obtained to realize starting. .

However, in the self-starting type permanent magnet type rotating electric machine described above, since the starting torque is ensured by covering the entire rotor with the starting basket, the magnetic resistance becomes large, Compared with the self-starting type permanent magnet type rotating electric machine, the permanent magnet 7 can be installed only near the inner peripheral portion of the rotor 3, so that there is a problem that the main magnetic flux is reduced and the output is reduced. .

An object of the present invention is to start as an induction machine at startup and to operate as a synchronous machine at rated operation without lowering the output as compared with a non-self-starting type permanent magnet rotating electric machine. An object of the present invention is to provide a rotor of a self-starting type permanent magnet type rotating electric machine.

[0014]

In order to achieve the above-mentioned object, a rotor core having a magnetic portion and having magnetic irregularities formed circumferentially in the circumferential direction passes between a magnetic pole adjacent to the rotor core. In a rotor of a permanent magnet type rotating electric machine comprising a permanent magnet provided so as to cancel a magnetic flux from an armature coil, the invention according to claim 1 is provided on an outer peripheral portion of a rotor core, A cylindrical conductor that generates an induction current and generates a starting torque when the electric machine is started, and a cylindrical holding ring that is provided on an outer peripheral portion of the cylindrical conductor and holds a centrifugal force acting on the cylindrical conductor when the rotating electric machine is operating.

Therefore, in the rotor of the permanent magnet type rotating electric machine according to the first aspect of the present invention, a cylindrical conductor that generates an induction current when the rotating electric machine is started to generate a starting torque is provided on an outer peripheral portion of the rotor core, Furthermore, by providing a cylindrical holding ring for holding a centrifugal force acting on the cylindrical conductor during operation of the rotating electric machine, without lowering the main magnetic flux,
Thus, it has an output equivalent to that of a non-self-starting permanent magnet type rotating electric machine, can start as an induction machine at the time of starting, and can operate as a synchronous machine at rated operation.

According to the second aspect of the present invention, the rotor is provided between the magnetic poles on the outer peripheral portion of the rotor core, and is curved along the circumferential direction of the rotor. A curved conductor to be generated is provided, and a cylindrical holding ring provided on an outer peripheral portion of the curved conductor and holding a centrifugal force acting on the curved conductor when the rotating electric machine is operated.

Therefore, in the rotor of the permanent magnet type rotating electric machine according to the second aspect of the present invention, a curved conductor which generates an induced current at the time of starting the rotating electric machine to generate a starting torque between the magnetic poles on the outer peripheral portion of the rotor core. , And further on its outer periphery,
By providing a cylindrical holding ring that holds the centrifugal force that acts on the curved conductor during operation of the rotating electric machine, it has the same output as a non-self-starting permanent magnet type rotating electric machine without lowering the main magnetic flux, and starts Sometimes it starts as an induction machine and can operate as a synchronous machine during rated operation.

On the other hand, according to the third aspect of the present invention, the above-mentioned first aspect is provided.
In the rotor of the permanent magnet type rotary electric machine of the invention of the invention, on the outer peripheral surface of the cylindrical conductor provided on the outer peripheral portion of the rotor core,
A groove is provided which is substantially parallel to the rotor center axis direction and has a constant depth.

Therefore, in the rotor of the permanent magnet type rotating electric machine according to the third aspect of the present invention, a groove which is substantially parallel to the center axis direction of the rotor and has a constant depth is provided on the outer peripheral surface of the cylindrical conductor. Increases the induction torque at startup,
In addition, a self-starting type permanent magnet type rotating electric machine having the same output as that of the non-self-starting type permanent magnet type rotating electric machine can be realized.

Further, in the invention of claim 4, the above-mentioned claim 1 is provided.
In the rotor of the permanent magnet type rotary electric machine of the invention of the invention, on the outer peripheral surface of the cylindrical conductor provided on the outer peripheral portion of the rotor core,
A groove is formed at a certain angle with the direction of the rotor center axis and at a certain depth.

Therefore, in the rotor of the permanent magnet type rotating electric machine according to the fourth aspect of the present invention, a groove having a certain angle with the center axis direction of the rotor and a certain depth is formed on the outer peripheral surface of the cylindrical conductor. The self-starting permanent magnet type rotating electric machine which increases the induction torque at the time of starting, reduces the pulsation of the starting torque, and has the same output as the non-self starting type permanent magnet type rotating electric machine can do.

According to a fifth aspect of the present invention, in the rotor of the permanent magnet type rotating electric machine according to the first aspect of the present invention, the center of the rotor is provided on the outer peripheral surface of the cylindrical conductor provided on the outer peripheral portion of the rotor core. A groove having a certain angle with the axial direction, a geometric symmetry about the rotor central section, and a certain depth is provided.

Accordingly, in the rotor of the permanent magnet type rotating electric machine according to the fifth aspect of the present invention, the outer peripheral surface of the cylindrical conductor has a certain angle with respect to the direction of the rotor center axis, and has a geometrical boundary with the center section of the rotor as a boundary. By providing a groove having a constant depth and a constant depth, the induction torque at the time of starting is increased, the pulsation of the starting torque is reduced, and the output is equivalent to that of a non-self-starting permanent magnet type rotating electric machine. , A self-starting permanent magnet type rotating electric machine having

According to a sixth aspect of the present invention, there is provided the rotor of the permanent magnet type rotary electric machine according to any one of the first, third, fourth and fifth aspects of the present invention. Is formed of a magnetic material.

Therefore, in the rotor of the permanent magnet type rotating electric machine according to the invention of claim 6, the magnetic resistance at the magnetic pole portion is further reduced and the non-self-starting is achieved by forming the cylindrical conductor using a magnetic material. A self-starting type permanent magnet type rotating electric machine having an output equivalent to that of a permanent magnet type rotating electric machine of the type can be realized.

On the other hand, according to the invention of claim 7, the above-mentioned claim 2
In the rotor of the permanent magnet type rotating electric machine of the invention of the invention, on the outer peripheral surface of the curved conductor provided on the outer peripheral portion of the rotor core,
A groove is provided which is substantially parallel to the rotor center axis direction and has a constant depth.

Therefore, in the rotor of the permanent magnet type rotating electric machine according to the present invention, a groove having a depth substantially parallel to the central axis of the rotor and having a constant depth is provided on the outer peripheral surface of the curved conductor. Increases the induction torque at startup,
In addition, a self-starting type permanent magnet type rotating electric machine having the same output as that of the non-self-starting type permanent magnet type rotating electric machine can be realized.

[0028] According to the invention of claim 8, the above-mentioned claim 2 is provided.
In the rotor of the permanent magnet type rotating electric machine of the invention of the invention, on the outer peripheral surface of the curved conductor provided on the outer peripheral portion of the rotor core,
A groove is formed at a certain angle with the direction of the rotor center axis and at a certain depth.

Therefore, in the rotor of the permanent magnet type rotating electric machine according to the present invention, a groove having a constant angle with the rotor central axis direction and a constant depth is formed on the outer peripheral surface of the curved conductor. The self-starting permanent magnet type rotating electric machine which increases the induction torque at the time of starting, reduces the pulsation of the starting torque, and has the same output as the non-self starting type permanent magnet type rotating electric machine can do.

According to a ninth aspect of the present invention, in the rotor of the permanent magnet type rotary electric machine according to the second aspect of the present invention, the center of the rotor is provided on the outer peripheral surface of the curved conductor provided on the outer peripheral portion of the rotor core. A groove having a certain angle with the axial direction, a geometric symmetry about the rotor central section, and a certain depth is provided.

Therefore, in the rotor of the permanent magnet type rotating electric machine according to the ninth aspect of the present invention, the outer peripheral surface of the curved conductor forms a fixed angle with the direction of the rotor central axis and is geometrically bounded by the rotor central cross section. By providing a groove having a constant depth and a constant depth, the induction torque at the time of starting is increased, the pulsation of the starting torque is reduced, and the output is equivalent to that of a non-self-starting permanent magnet type rotating electric machine. , A self-starting permanent magnet type rotating electric machine having

Further, according to the tenth aspect of the present invention, any one of the second, seventh, eighth and ninth aspects of the present invention is provided.
In the rotor of the permanent magnet type rotating electric machine according to the invention, the curved conductor provided on the outer peripheral portion of the rotor core is made of a magnetic material.

Therefore, in the rotor of the permanent magnet type rotating electric machine according to the tenth aspect of the present invention, the magnetic resistance of the magnetic pole portion is further reduced by forming the curved conductor by using a magnetic material, and the non-self-starting type. A self-starting type permanent magnet type rotating electric machine having the same output as that of the permanent magnet type rotating electric machine can be realized.

[0034]

Embodiments of the present invention will be described below in detail with reference to the drawings.

(First Embodiment) FIG. 1 is a radial sectional view showing an example of the configuration of a self-starting type permanent magnet type rotary electric machine according to the present embodiment. Are shown.

In FIG. 1, the stator 1 has an armature coil 2, and is configured to house the rotor 3 through a gap 12 inside.

The rotor 3 cancels out magnetic flux from the rotor core 4 having a magnetic portion and having magnetic irregularities in the circumferential direction and the armature coil 2 passing between adjacent magnetic poles of the rotor core 4. And a starting cylindrical conductor 8 which are provided on the outer periphery of the rotor core 4 and generate an induction current when the rotating electric machine is started to generate a starting torque. , And a cylindrical holding ring 9 for holding a centrifugal force acting on the cylindrical conductor 8 during operation of the rotary electric machine.

The rotor core 4 has a direction of easy magnetization (a so-called d
(Electromagnetic steel) provided with eight hollow portions 6 along the axis).

The eight hollow portions 6 of the rotor core 4 are arranged in a cross shape as shown in the figure, and permanent magnets 7 are embedded therein. It is configured.

Each permanent magnet 7 is magnetized in the same direction so as to cancel the magnetic flux of the armature coil 2 along the adjacent concave portion, that is, the direction of hard magnetization (so-called q-axis), and the two permanent magnets located on both sides of the concave portion. The magnets 7 have opposite magnetization directions in the circumferential direction of the rotor core 4.

In other words, the portion sandwiched between the two parallel cavities 6 is in the direction of easy magnetization, forms a magnetic projection, that is, a magnetic pole, and is sandwiched between two cavities 6 which cross perpendicularly to each other and are adjacent to each other. The portion to be magnetized is a direction in which magnetization is difficult, and forms a magnetic concave portion.

As the material of the permanent magnet 7, a high-energy product rare earth magnet, preferably an NdFeB magnet, is used. It is preferably magnetized substantially in the circumferential direction, more preferably in a direction perpendicular to the magnetic pole axis. , Rotor core 4
A fan-shaped notch (hollow portion) 13 near the outer circumference of the magnetic pole ring
Is formed.

On the other hand, in order to realize a self-starting type permanent magnet type electric rotating machine without lowering the output as compared with a non-self-starting type permanent magnet type electric rotating machine, it is a main factor that the magnetic resistance increases. It is necessary to reduce the thickness of the starting bar 14 (see FIG. 9) in the radial direction.
Instead of the starting bar 14 used in the conventional self-starting type permanent magnet type rotating electric machine, a thin starting cylindrical body 8 is provided on the outer periphery of the rotor.

Furthermore, in this embodiment, the starting cylindrical conductor 8 is made of, for example, aluminum or the like, and has a lower mechanical strength than a laminated iron core. I have.

For the cylindrical retaining ring 9, a reinforced fiber composite material having high mechanical strength, preferably FRP is used.

The thickness of the cylindrical retaining ring 9 in the radial direction has a high mechanical strength, so that it can be made extremely thin.

Further, since the cylindrical conductor 8 for starting has the cylindrical retaining ring 9 provided on the outer peripheral portion thereof, it is necessary to maintain the centrifugal force acting on the cylindrical conductor 8 during operation of the rotary electric machine with its own mechanical strength. Instead, it can be configured to be thin in the radial direction similarly to the cylindrical holding ring 9.

In the rotor of the self-starting type permanent magnet type rotating electric machine of the present embodiment configured as described above, an induction current is generated on the outer peripheral portion of the rotor core 4 when the rotating electric machine is started, and the starting torque is generated. By providing a starting cylindrical conductor 8 for generating a magnetic field, and by providing a cylindrical holding ring 9 for holding a centrifugal force acting on the cylindrical conductor 8 during operation of the rotating electric machine at the outer peripheral portion thereof, a magnetic resistance is mainly increased. The radial thickness of the starting conductor installation portion, which is a factor, can be made extremely thin, and a rotor having the same magnetic resistance as a non-self-starting permanent magnet type rotating electric machine can be made.

Thus, without lowering the main magnetic flux, it has an output equivalent to that of a non-self-starting type permanent magnet type rotating electric machine, starts as an induction machine at startup, and operates as a synchronous machine at rated operation. Can be.

As described above, in the rotor of the self-starting type permanent magnet type rotating electric machine of the present embodiment, the output is not reduced compared with the non-self-starting type permanent magnet type rotating electric machine. It starts as an induction machine, and can operate as a synchronous machine during rated operation.

(Second Embodiment) FIG. 2 is a cross-sectional view in the radial direction showing a configuration example of a self-starting type permanent magnet type rotating electric machine according to the present embodiment. The description thereof is omitted, and only different parts will be described here.

That is, in the present embodiment, the starting cylindrical conductor 8 shown in FIG. 1 is omitted, and instead, the induction current is supplied to the outer peripheral portion of the rotor core 4 between the magnetic poles when the rotating electric machine is started. The starting curved conductor 10 that generates and generates a starting torque is provided so as to be curved along the circumferential direction of the rotor.

The curved conductor 10 is fixed to the rotor core 4 by the cylindrical holding ring 9 provided on the outer periphery.

In the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment configured as described above, an induced current is generated in the portion between the magnetic poles on the outer peripheral portion of the rotor core 4 when the rotating electric machine is started. A starting bending conductor 10 for generating a starting torque is provided, and a cylindrical holding ring 9 for holding a centrifugal force acting on the bending conductor 10 during operation of the rotating electric machine is provided on an outer peripheral portion thereof. Is provided between the magnetic poles, the magnetic resistance of the magnetic pole portion, that is, the magnetic resistance in the d-axis direction can be reduced, and the same magnetic property as a non-self-starting permanent magnet type rotating electric machine can be obtained. A rotor having resistance can be configured.

Thus, without lowering the main magnetic flux, it has an output equivalent to that of a non-self-starting type permanent magnet type rotating electric machine, starts as an induction machine at startup, and operates as a synchronous machine at rated operation. Can be.

As described above, even in the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment, the output is not reduced compared with the non-self-starting type permanent magnet type rotating electric machine, It starts as an induction machine, and can operate as a synchronous machine during rated operation.

(Third Embodiment) FIG. 3 is a perspective view showing a configuration example of a cylindrical conductor 8 provided on an outer peripheral portion of a rotor of a self-starting type permanent magnet type rotary electric machine according to the present embodiment. The same elements as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted. Only different parts will be described here.

That is, in the present embodiment, a groove 11 having a constant depth substantially parallel to the center axis direction of the rotor is provided on the outer peripheral surface of the starting cylindrical conductor 8 in FIG.

In the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment configured as described above, the outer circumferential surface of the starting cylindrical conductor 8 is substantially parallel to the rotor center axis direction. In addition, since the groove 11 having a constant depth is provided, no current flows through the groove 11, and the induced current accompanying the change in the armature current at the time of starting causes the rotor center axis to flow between the grooves 11. It flows in parallel to the direction, and has the effect of increasing the induction torque at the time of starting.

Thus, it is possible to realize a self-starting permanent magnet type rotating electric machine which increases the induction torque at the time of starting and has the same output as that of the non-self-starting type permanent magnet type rotating electric machine.

As described above, in the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment, the induction torque at the time of starting is increased, and the same as that of the non-self-starting type permanent magnet type rotating electric machine. It is possible to realize a self-starting permanent magnet type rotating electric machine having an output.

(Fourth Embodiment) FIG. 4 is a radial cross section showing a configuration example of a cylindrical conductor 8 provided on an outer peripheral portion of a rotor of a self-starting type permanent magnet type rotating electric machine according to the present embodiment. FIG. 2 is a diagram and a side view, in which the same elements as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.

That is, in this embodiment, the rotor center axis direction 15 and the groove direction 16 form a constant angle 17 and a constant depth on the outer peripheral surface of the starting cylindrical conductor 8 in FIG. Is provided.

In the rotor of the self-starting type permanent magnet type rotating electric machine of the present embodiment configured as described above, a fixed angle 17 with respect to the rotor central axis direction 15 is formed on the outer peripheral surface of the cylindrical conductor 8. Since the groove 16 is formed and has a certain depth, the groove 16 forms a certain angle 17 with the rotor central axis direction 15, so that the pulsation of the starting torque can be reduced.

Thus, a self-starting type permanent magnet type rotating electric machine which increases the induction torque at the time of starting, reduces the pulsation of the starting torque, and has the same output as the non-self-starting type permanent magnet type rotating electric machine is provided. Can be realized.

As described above, in the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment, the induction torque at the time of starting is increased, the pulsation of the starting torque is reduced, and the non-self-starting type It is possible to realize a self-starting type permanent magnet rotating electric machine having an output equivalent to that of the permanent magnet rotating electric machine.

(Fifth Embodiment) FIG. 5 is a radial cross section showing a configuration example of a cylindrical conductor 8 provided on the outer peripheral portion of a rotor of a self-starting type permanent magnet type rotating electric machine according to the present embodiment. FIG. 2 is a diagram and a side view, in which the same elements as those in FIG. 1 are denoted by the same reference numerals, and the description thereof will be omitted.

That is, in the present embodiment, a groove having a constant angle with the rotor center axis direction and a constant depth is formed on the outer peripheral surface of the starting cylindrical conductor 8 in FIG. 11 are provided. Further, the groove 11 is configured to be a geometric object with the rotor central portion 18 as a boundary.

In the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment configured as described above, the outer peripheral surface of the cylindrical conductor 8 forms a fixed angle with the central axis direction of the rotor. Since the groove 11 having a geometric depth and a certain depth is provided with the rotor center portion 18 as a boundary, no current flows through the groove 11, so that a change in the armature current at the time of starting causes a change. The induced current flows between the grooves 11 in parallel with the grooves 11, and has the effect of increasing the induced torque at the time of starting.

Further, since the groove 11 forms a constant angle with the direction of the center axis of the rotor, the pulsation of the starting torque can be reduced.

Thus, a self-starting type permanent magnet type rotating electric machine which increases the induction torque at the time of starting, reduces the pulsation of the starting torque, and has the same output as the non-self-starting type permanent magnet type rotating electric machine is provided. Can be realized.

As described above, even in the rotor of the self-starting type permanent magnet type rotary electric machine according to the present embodiment, the induction torque at the time of starting is increased, the pulsation of the starting torque is reduced, and the non-self-starting type It is possible to realize a self-starting type permanent magnet rotating electric machine having an output equivalent to that of the permanent magnet rotating electric machine.

(Sixth Embodiment) The rotor of the self-starting type permanent magnet type rotary electric machine according to the present embodiment is provided in the first, third, fourth and fifth embodiments described above. The starting cylindrical conductor 8 is made of a magnetic material.

In the rotor of the self-starting type permanent magnet type rotating electric machine of the present embodiment configured as described above, since the starting cylindrical conductor 8 is made of a magnetic material, the magnetic pole By further reducing the magnetic resistance in the section, a self-starting permanent magnet type rotating electric machine having an output equivalent to that of a non-self-starting type permanent magnet type rotating electric machine can be realized.

As described above, in the rotor of the self-starting type permanent magnet type rotary electric machine according to the present embodiment, the magnetic resistance at the magnetic pole portion is further reduced, and the non-self-starting type permanent magnet type rotary electric machine is used. It is possible to realize a self-starting permanent magnet type rotating electric machine having an equivalent output.

(Seventh Embodiment) FIG. 6 is a radial cross section showing a configuration example of a cylindrical conductor 8 provided on the outer peripheral portion of a rotor of a self-starting type permanent magnet type rotating electric machine according to the present embodiment. FIG. 3 is a diagram and a side view, in which the same elements as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

That is, in the present embodiment, the groove 11 having a constant depth substantially parallel to the center axis direction of the rotor is provided on the outer peripheral surface of the starting curved conductor 10 in FIG.

In the rotor of the self-starting type permanent magnet type rotating electric machine of the present embodiment configured as described above, the outer circumferential surface of the starting curved conductor 10 is substantially parallel to the rotor central axis direction. In addition, since the groove 11 having a constant depth is provided, no current flows through the groove 11, and the induced current accompanying the change in the armature current at the time of starting causes the rotor center axis to flow between the grooves 11. It flows in parallel to the direction, and has the effect of increasing the induction torque at the time of starting.

As a result, it is possible to realize a self-starting type permanent magnet type rotating electric machine which increases the induction torque at the time of starting and has the same output as a non-self-starting type permanent magnet type rotating electric machine.

As described above, in the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment, the induction torque at the time of starting is increased, and the same as that of the non-self-starting type permanent magnet type rotating electric machine. It is possible to realize a self-starting permanent magnet type rotating electric machine having an output.

(Eighth Embodiment) FIG. 7 is a radial cross section showing a structural example of a cylindrical conductor 8 provided on the outer periphery of a rotor of a self-starting type permanent magnet type rotary electric machine according to the present embodiment. FIG. 3 is a diagram and a side view, in which the same elements as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

That is, in the present embodiment, the direction of the center axis of the rotor and the direction of the groove have a certain angle and a certain depth on the outer peripheral surface of the starting curved conductor 10 in FIG. A groove 11 is provided.

In the rotor of the self-starting type permanent magnet type rotating electric machine of the present embodiment configured as described above, the outer peripheral surface of the starting curved conductor 10 has the rotor central axis direction and the groove direction. Is provided with a groove 11 having a certain angle and a certain depth, so that the groove 11 forms a certain angle with the direction of the rotor center axis, thereby reducing the pulsation of the starting torque. Can be.

Thus, a self-starting type permanent magnet type rotating electric machine which increases the induction torque at the time of starting, reduces the pulsation of the starting torque, and has the same output as the non-self-starting type permanent magnet type rotating electric machine is provided. Can be realized.

As described above, in the rotor of the self-starting type permanent magnet type rotary electric machine according to the present embodiment, the induction torque at the time of starting is increased, the pulsation of the starting torque is reduced, and the non-self-starting type It is possible to realize a self-starting type permanent magnet rotating electric machine having an output equivalent to that of the permanent magnet rotating electric machine.

(Ninth Embodiment) FIG. 8 is a radial cross section showing a configuration example of a cylindrical conductor 8 provided on an outer peripheral portion of a rotor of a self-starting type permanent magnet type rotating electric machine according to the present embodiment. FIG. 3 is a diagram and a side view, in which the same elements as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted.

That is, in this embodiment, a groove having a fixed angle between the rotor axis direction and the groove direction and a fixed depth is formed on the outer peripheral surface of the starting curved conductor 10 in FIG. 11 are provided. Further, the groove 11 is configured to be a geometric object with the rotor central portion 18 as a boundary.

In the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment configured as described above, the outer peripheral surface of the curved conductor 10 forms a fixed angle with the central axis direction of the rotor. Since the groove 11 having a geometric depth and a certain depth is provided with the rotor center portion 18 as a boundary, no current flows through the groove 11, so that a change in the armature current at the time of starting causes a change. The induced current flows between the grooves 11
And has an effect of increasing the induction torque at the time of starting.

Further, since the groove 11 forms a constant angle with the direction of the center axis of the rotor, the pulsation of the starting torque can be reduced.

Thus, a self-starting type permanent magnet type rotating electric machine which increases the induction torque at the time of starting, reduces the pulsation of the starting torque, and has the same output as the non-self-starting type permanent magnet type rotating electric machine is provided. Can be realized.

As described above, even in the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment, the induction torque at the time of starting is increased, the pulsation of the starting torque is reduced, and the non-self-starting type It is possible to realize a self-starting type permanent magnet rotating electric machine having an output equivalent to that of the permanent magnet rotating electric machine.

(Tenth Embodiment) The rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment is provided in the above-described second, seventh, eighth, and ninth embodiments. The starting curved conductor 10 is formed by using a magnetic material.

In the rotor of the self-starting type permanent magnet type rotating electric machine of the present embodiment configured as described above, since the starting curved conductor 10 is made of a magnetic material, the magnetic pole By further reducing the magnetic resistance in the section, a self-starting permanent magnet type rotating electric machine having an output equivalent to that of a non-self-starting type permanent magnet type rotating electric machine can be realized.

As described above, in the rotor of the self-starting type permanent magnet type rotating electric machine according to the present embodiment, the magnetic resistance at the magnetic pole portion is further reduced, and the non-self-starting type permanent magnet type rotating electric machine is used. It is possible to realize a self-starting permanent magnet type rotating electric machine having an equivalent output.

[0095]

As described above, according to the rotor of the self-starting type permanent magnet type rotary electric machine of the present invention, an induction current is generated on the outer peripheral portion of the rotor core at the time of starting the rotary electric machine to start torque. Providing a cylindrical or curved conductor that generates
Furthermore, since the outer peripheral portion is provided with a cylindrical holding ring that holds a centrifugal force acting on the cylindrical conductor or the curved conductor during the operation of the rotating electric machine, it is equivalent to a non-self-starting permanent magnet type rotating electric machine. It has an output and can be started as an induction machine at the start, and can be operated as a synchronous machine at rated operation.

Further, since a groove having a depth substantially parallel to the center axis of the rotor and having a constant depth is provided on the outer peripheral surface of the cylindrical conductor or the curved conductor, the induction torque at the time of starting can be increased. Becomes possible.

Further, a groove having a certain angle with the rotor center axis direction and a certain depth, or a groove having a certain angle with the rotor center axis direction or a certain angle with the rotor center axis direction is formed on the outer peripheral surface of the cylindrical conductor or the curved conductor. Since a groove having a certain depth is formed with geometric symmetry with a rotor center cross section as a boundary, a self-starting type permanent magnet type rotating electric machine with less torque pulsation can be realized. .

Further, a cylindrical conductor or a curved conductor is
Since it is made of a magnetic material, it is possible to further reduce the magnetic resistance at the magnetic pole portion.

[Brief description of the drawings]

FIG. 1 is a radial cross-sectional view illustrating a first embodiment of a self-starting permanent magnet type rotating electric machine according to the present invention.

FIG. 2 is a radial sectional view showing a second embodiment of the self-starting permanent magnet type rotating electric machine according to the present invention.

FIG. 3 is a perspective view showing a third embodiment of the self-starting permanent magnet type rotating electric machine according to the present invention.

FIG. 4 is a radial sectional view and a side view showing a fourth embodiment of a self-starting permanent magnet type rotating electric machine according to the present invention.

FIG. 5 is a radial sectional view and a side view showing a fifth embodiment of a self-starting permanent magnet type rotating electric machine according to the present invention.

FIG. 6 is a radial sectional view and a side view showing a seventh embodiment of the self-starting permanent magnet type rotating electric machine according to the present invention.

FIG. 7 is a radial sectional view and a side view showing an eighth embodiment of the self-starting permanent magnet type rotating electric machine according to the present invention.

FIG. 8 is a radial sectional view and a side view showing a ninth embodiment of a self-starting permanent magnet type rotary electric machine according to the present invention.

FIG. 9 is a radial cross-sectional view illustrating a configuration example of a conventional self-starting type permanent magnet rotating electric machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Stator 2 ... Armature coil 3 ... Rotor 4 ... Rotor iron core 5 ... Stator iron core 6 ... Cavity part 7 ... Permanent magnet 8 ... Cylindrical conductor 9 ... Cylindrical holding ring 10 ... Curved conductor 11 ... Groove 12 ... Air gap 13 Notch (hollow portion) 14 Conductor bar 15 Rotor central axis direction 16 Groove direction 17 Angle 18 Rotor center portion.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court ゛ (Reference) H02K 21/46 H02K 21/46 (72) Inventor Kazuto Sakai 2-chome Suehirocho, Tsurumi-ku, Yokohama-shi, Kanagawa Address Toshiba Corporation Keihin Plant F-term (reference)

Claims (10)

[Claims] 1. A rotor core having a magnetic portion and having a circumferentially magnetic unevenness formed in a circumferential direction and a magnetic flux from an armature coil passing between adjacent magnetic poles of the rotor iron core are provided. A self-starting type permanent magnet type rotating electric machine rotor comprising a permanent magnet, a cylinder provided on an outer peripheral portion of the rotor core, generating an induction current at the time of starting the rotating electric machine to generate a starting torque. A rotor for a permanent magnet type rotating electric machine, comprising: a conductor; and a cylindrical holding ring provided on an outer peripheral portion of the cylindrical conductor and holding a centrifugal force acting on the cylindrical conductor during operation of the rotating electric machine. . 2. A rotor core having a magnetic portion and having magnetically unevenness formed in a circumferential direction, and provided so as to cancel a magnetic flux from an armature coil passing between adjacent magnetic poles of the rotor core. A rotor of a self-starting type permanent magnet type rotating electric machine comprising a permanent magnet, the rotor being provided between magnetic poles on an outer peripheral portion of the rotor core, being curved along a rotor circumferential direction, and being rotated. A curved conductor that generates an induced current when the electric machine is started to generate a starting torque; and a cylindrical holding ring that is provided on an outer peripheral portion of the curved conductor and that holds a centrifugal force acting on the curved conductor when the rotating electric machine is operating. A rotor of a permanent magnet type rotating electric machine characterized by comprising: 3. The rotor of the permanent magnet type rotating electric machine according to claim 1, wherein an outer peripheral surface of a cylindrical conductor provided on an outer peripheral portion of the rotor core is substantially parallel to a central axis direction of the rotor. A rotor for a permanent magnet type rotating electric machine, wherein a groove having a constant depth is provided. 4. The rotor of the permanent magnet type rotating electric machine according to claim 1, wherein an outer peripheral surface of a cylindrical conductor provided on an outer peripheral portion of the rotor core has a predetermined angle with respect to a direction of a central axis of the rotor. And a groove having a constant depth is provided. 5. The rotor of the permanent magnet type rotating electric machine according to claim 1, wherein an outer peripheral surface of a cylindrical conductor provided on an outer peripheral portion of the rotor core has a predetermined angle with respect to a central axis direction of the rotor. And a groove having a constant depth and having a geometrical symmetry with a center section of the rotor as a boundary. 6. The rotor of the permanent magnet type rotating electric machine according to claim 1, wherein the rotor is provided on an outer peripheral portion of the rotor core. A rotor for a permanent magnet type rotating electric machine, wherein the cylindrical conductor is made of a magnetic material. 7. The rotor of the permanent magnet type rotating electric machine according to claim 2, wherein an outer peripheral surface of a curved conductor provided on an outer peripheral portion of the rotor core is substantially parallel to a rotor central axis direction. A rotor for a permanent magnet type rotating electric machine, wherein a groove having a constant depth is provided. 8. The rotor of the permanent magnet type rotating electric machine according to claim 2, wherein the outer peripheral surface of the curved conductor provided on the outer peripheral portion of the rotor core has a fixed angle with respect to the direction of the central axis of the rotor. And a groove having a constant depth is provided. 9. The rotor of the permanent magnet type rotating electric machine according to claim 2, wherein the outer peripheral surface of the curved conductor provided on the outer peripheral portion of the rotor core has a fixed angle with respect to the central axis direction of the rotor. And a groove having a constant depth and having a geometrical symmetry with a center section of the rotor as a boundary. 10. The method of claim 2, claim 7, claim 8,
The rotor of the permanent magnet type rotating electric machine according to claim 9, wherein the curved conductor provided on an outer peripheral portion of the rotor core is made of a magnetic material. Electric motor rotor.