JP6044077B2 - Electric rotating machine and electric rotating system - Google Patents

Description

  The present invention relates to an electric rotating machine and an electric rotating system, and in particular, relates to an electric rotating machine that realizes highly efficient rotational driving.

  Electric rotating machines mounted on various devices are required to have characteristics corresponding to the mounted devices. For example, they are mounted on a hybrid electric vehicle with an internal combustion engine as a driving source, or as a single driving source. In the case of a drive motor mounted on an electric vehicle (Electric Vehicle), it is required to have a wide variable speed characteristic at the same time as generating a large torque in a low rotation range.

As an electric rotating machine having such characteristics, it is effective to adopt a structure that can effectively use reluctance torque together with magnet torque, and it is permanent so as to be V-shaped that opens toward the outer peripheral surface side. It has been proposed to employ an IPM (Interior Permanent Magnet) structure in which a magnet (magnetic pole) is embedded in a rotor (for example, Patent Document 1).
In addition, the electric rotating machine is required to be driven with high efficiency in order to reduce power consumption and efficiently generate a desired driving force. In particular, hybrid vehicles and electric vehicles are required to have an electric rotating machine that is capable of high energy density output through weight reduction and miniaturization in response to the recent demand for improved energy efficiency (fuel consumption) as well as restrictions on mounting space. It has been. For this reason, neodymium magnets having a high residual magnetic flux density are frequently used as embedded permanent magnets.

  This neodymium magnet is an expensive rare earth (rare earth) magnet mainly composed of Nd—Fe—B, and there is a problem that the cost increases as the amount of magnet increases. In addition, when the amount of magnet is increased, the voltage induced at the motor terminal is proportionally increased. Therefore, when high-speed rotation driving is performed, the current phase angle is advanced and a negative d-axis current is allowed to flow so that the induced voltage is reduced. It is necessary to suppress the rise below the DC bus voltage, and for this reason, the output torque required on the high rotation region side cannot be ensured, resulting in a deterioration in efficiency. The d-axis is the direction of the magnetic flux created by the magnetic pole, for example, the central axis in the case of a permanent magnet embedded in a V-shape.

  In order to solve this problem, a power transmission method using only one path, in which the rotor is rotated by feeding a coil on the stator side to generate a rotating magnetic field to drive the output shaft, power is transmitted from multiple paths. An electric rotating machine that drives the output shaft to rotate with a double rotor has been proposed as a method of dividing this power transmission into multiple paths by using a dividing system for transmission (for example, Patent Document 2). .

  In the electric rotating machine described in this document 2, the first rotor (rotor) is connected to the output shaft of the internal combustion engine, and the second rotor (rotor) is connected to the drive shaft of the vehicle. As a result, it is constructed in a structure that can be used by transmitting the power as each, and when transmitting power from the internal combustion engine to the wheels, a continuously variable transmission function is realized that continuously changes the ratio of the respective rotational speeds. .

JP 2008-99418 A JP 2000-197324 A

However, the electric rotating machine described in Patent Document 2 is constructed in a compact structure in which the second rotor is accommodated in the first rotor, but the output shaft of the internal combustion engine has a large outer diameter. One rotor is connected, and a second rotor having a small outer diameter is connected to the drive shaft of the vehicle.
In general, the output torque T of the motor is proportional to the square of the outer diameter D of the rotor, as shown in the following equation. Therefore, the output torque cannot be efficiently used as the driving force.
T∝D ² × L (D: Rotor outer diameter, L: Stack thickness of rotor plate material)
Therefore, an object of the present invention is to provide an electric rotating machine that can efficiently use the output torque of a double rotor structure.

A first aspect of the invention relating to an electric rotating machine that solves the above problems includes a stator, a first rotor that is rotatably housed in the stator, and a housing that is rotatably housed in the first rotor. A rotating magnetic field formed on the stator side to form a synchronous motor that synchronously rotates the first rotor side, and a rotation formed on the first rotor side. An electric rotating machine comprising an induction motor in which a magnetic field slides and rotates on the second rotor side.
Is.

  In a second aspect of the invention relating to the electric rotating machine that solves the above-described problem, in addition to the specific matter of the first aspect, the stator includes the first on the inner peripheral surface side that houses the first rotor. A winding coil of a plurality of phases for inputting a driving current of one rotor is arranged, and a permanent magnet magnetically coupled to a rotating magnetic field formed by the winding coil of the stator is arranged in the first rotor. In addition, a permanent magnet that forms a rotating magnetic field for rotating the second rotor is disposed on an inner peripheral surface side that houses the second rotor, and the second rotor has the first rotation. A winding coil that is magnetically coupled to a rotating magnetic field formed by the permanent magnet of the child is provided.

According to a third aspect of the invention relating to the electric rotating machine that solves the above problem, in addition to the specific matter of the first or second aspect, the first rotor and the second rotor are connected or disconnected. It is characterized by including a clutch mechanism for making a state.
A first aspect of the invention relating to an electric rotating system that solves the above problems includes the electric rotating machine described above, and an output shaft is connected to rotate integrally with the first rotor of the electric rotating machine. It is characterized by this.

According to a second aspect of the invention relating to the electric rotating system for solving the above problems, in addition to the specific matter of the first aspect, an input shaft is connected so as to rotate integrally with the second rotor of the electric rotating machine. It is characterized by that.
In a third aspect of the invention related to the electric rotating system that solves the above problem, in addition to the specific matter of the first or second aspect, the slip rotation speed of the second rotor relative to the first rotor is negative. Thus, a control unit that controls the drive frequency is provided.

Thus, according to one aspect of the present invention, a double rotor structure in which the induction motors of the first rotor and the second rotor are accommodated in the synchronous motor of the stator and the first rotor is constructed. Thus, it is possible to construct an electric rotation system in which the first rotor side is used as an output shaft for driving force and the second rotor side is used as an input shaft for driving force. By controlling the drive frequency so that the slip rotation speed of the second rotor with respect to the first rotor is negative, power is generated by the rotation of the second rotor, in other words, the driving force of the second rotor is reduced to the first. Power can be transmitted in addition to the driving force of one rotor, and the driving force can be generated and output more efficiently than in the case of a rotor structure having only one of the first and second rotors. Since the first rotor is a rotor having a larger diameter than that of the second rotor, the drive torque can be efficiently transmitted. Further, when a clutch mechanism for connecting the first and second rotors is provided, the clutch mechanism can be integrally rotated without loss, and the other can be integrally rotated with a driving force input to one, for example, Can be used as the other starter.
Therefore, it is possible to realize an easy-to-use and efficient rotational drive in which a drive source and a power transmission destination can be arbitrarily connected to the first and second rotors to rotate each of them.

It is a figure which shows one Embodiment of the electric rotary machine which concerns on this invention, and is a longitudinal cross-sectional view of the direction orthogonal to the rotating shaft which shows the schematic whole structure. It is a longitudinal cross-sectional view of the direction parallel to the rotating shaft. It is a top view which shows the generation | occurrence | production situation of the magnetic flux generation | occurrence | production when there is no magnetic pole in the rotor side. It is a figure explaining the transmission of the motive power, (a) is a conceptual diagram which shows the case where the double rotor structure is employ | adopted, (b) is a conceptual diagram which shows the case where the single rotor structure is employ | adopted. It is a graph explaining the drive control. It is a system block diagram which shows an example of the utilization form. It is a system configuration | structure figure which shows an example of the utilization form different from the FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to FIG. 1 are views showing an embodiment of an electric rotating machine according to the present invention.
1 and 2, an electric rotating machine (double rotor type motor) 10 includes a stator (stator) 11 that is formed in a substantially cylindrical shape, and is rotatably accommodated in the stator 11 and has an axial center. An outer rotor (PM rotor) 12 to which a corresponding rotation output shaft (also simply referred to as a rotation shaft) 13 is fixed, and a rotation input shaft that is rotatably housed in the outer rotor 12 and coincides with the axis. An internal rotor (IM rotor) 22 on which a fixed shaft 23 is fixed (for example, in a hybrid vehicle or an electric vehicle, as a drive source similar to an internal combustion engine, or a wheel wheel. It has suitable performance for mounting inside.

  The stator 11 is formed with a plurality of stator teeth 15 extending in the normal direction of the axis so that the outer peripheral surface 12a of the outer rotor 12 faces the inner peripheral surface 15a via the gap G1. Yes. The stator teeth 15 are formed by winding three-phase windings constituting a drive coil (winding coil) 14 for generating magnetic flux for rotationally driving the outer rotor 12 accommodated in the inside by distributed winding. ing.

  The outer rotor 12 is manufactured to have an IPM (Interior Permanent Magnet) structure in which a pair of permanent magnets 16 are embedded as one magnetic pole so as to be V-shaped to open toward the outer peripheral surface 12a. It is driven to rotate as the PM rotor of the synchronous motor. The outer rotor 12 includes a space 17a in which corners 16a of a plate-like permanent magnet 16 extending in the front / back direction of the drawing are fitted in a face-to-face state and accommodated in a stationary state, and both sides in the width direction of the permanent magnet 16 A V-shaped space 17 that forms a space 17b (hereinafter also referred to as a flux barrier 17b) that functions as a flux barrier that restricts the wraparound of the magnetic flux is formed so as to face the outer peripheral surface 12a. A center bridge 20 that connects and supports the permanent magnets 16 is formed between the V-shaped spaces 17 so that the permanent magnets 16 can be positioned and held against centrifugal force during high-speed rotation.

  In this electric rotating machine 10, the space between the stator teeth 15 constitutes a slot 18 for forming a drive coil 14 by winding it through a winding, and six sets of six permanent magnets 16 are provided on each side. It is constructed so that the stator teeth 15 face each other, in other words, the six slots 18 correspond to one magnetic pole formed on the pair of permanent magnets 16 side. That is, the electric rotating machine 10 is wound with 6 poles (3 pole pairs), 36 slots, single-phase distributed winding 5 pitches, with the N and S poles of the permanent magnet 16 alternately arranged for each adjacent magnetic pole. It is made to a wired three-phase IPM motor. In addition, the display of the N pole and the S pole in the figure does not exist on the surface of the member, but is shown for explanation.

  As a result, the electric rotating machine 10 converts the direct current output from the battery 201 into an alternating current by the inverter 202, energizes the drive coil 14 in the slot 18 of the stator 11, and rotates outwardly from the stator teeth 15. In addition to the magnet torque caused by the attractive force and repulsive force generated between the permanent magnet 16 and the reluctance torque that attempts to minimize the magnetic path through which the magnetic flux passes when the magnetic flux is passed through the child 12 Synchronous rotation can be driven by the total torque, and electrical energy energized and input from the rotation output shaft 13 that rotates integrally with the outer rotor 12 can be output as mechanical energy.

  Here, as shown in FIG. 3, the stator 11 and the outer rotor 12 in the electric rotating machine 10 are each provided with a plurality of stator teeth 15 corresponding to a pair of permanent magnets 16 constituting one magnetic pole. The drive coil 14 is distributedly wound in the slot 18 so as to form a magnetic path that is evenly arranged in the outer rotor 12, and in other words, along the magnetic path, in other words, the formation of magnetic flux is hindered. A V-shaped space 17 for accommodating the permanent magnet 16 is formed so as not to be present. The stator 11 and the outer rotor 12 are screwed using a bolt hole 19 or the like by stacking thin sheets of electromagnetic steel plate material such as silicon steel in the axial direction so as to have a thickness corresponding to a desired output torque. It is made by doing.

  The outer rotor 12 has six permanent magnets 26 along the inner peripheral surface 12b that accommodates the inner rotor 22 corresponding to each magnetic pole of the pair of permanent magnets 16 embedded inside. Is fixed. The permanent magnet 26 has an N-pole or an S-pole alternately arranged on the inner circumference for each magnetic pole of the pair of permanent magnets 16 while facing the outer circumferential face 22a of the inner rotor 22 via the gap G2. It is set so as to be on the surface (front surface) side, thereby constructing a 6-pole (3-pole pair) IM motor.

  The inner rotor 22 has a plurality of rotors extending in the normal direction of the axial center so that the outer peripheral surface 22a faces the inner peripheral surface 26a of the permanent magnet 26 on the outer rotor 12 side via the gap G2. Teeth 25 is formed, and the space between the rotor teeth 25 constitutes a slot 28 for forming a winding coil by being wound through the winding. In the rotor teeth 25, three-phase windings constituting an excitation coil (winding coil) (not shown) for generating a magnetic flux that is induced and rotated by the outer permanent magnet 26 on the outer rotor 12 side are distributed windings. It is wound and formed. The excitation coil is provided with a switching function such as a slip ring, so that the rotational drive can be controlled with high accuracy by appropriately adjusting the generated current, and the switching operation can be executed in a non-contact manner. Thus, a simple and robust structure may be constructed. Alternatively, a cage structure in which a conductor bar such as copper or aluminum is buried in the slot 28 and both ends are short-circuited by a ring may be used.

  The inner rotor 22 is rotationally driven by generating an induced electromotive force in the exciting coil in the slot 28 by the outer rotor 12 forming a rotating magnetic field by the integral rotation of the permanent magnet 26 on the inner peripheral surface 12b side. The outer rotor 12 functions as a stator of an induction motor to be driven, and the inner rotor 22 is constructed to be rotationally driven as an IM rotor of the induction motor. That is, the outer rotor 12 and the inner rotor 22 constitute an induction motor that is magnetically coupled so as to be capable of sliding rotation, and the inner rotor 22 can be induced to rotate as the outer rotor 12 rotates, Moreover, the outer rotor 12 can also be induction-rotated like a generator.

Here, the outer rotor 12 is between the permanent magnet 16 magnetically coupled to the stator teeth 15 on the stator 11 side and the permanent magnet 26 magnetically coupled to the rotor teeth 25 on the inner rotor 22 side. Along the magnetic path so as not to interfere with the formation of a magnetic path (see FIG. 3) entering the outer rotor 12 side from the stator teeth 15 on the side, and so as not to be affected by the magnetic force of the permanent magnet 26 Flux barriers 27a and 27b are formed. The first flux barrier 27a is formed so as to be positioned in the intermediate portion in a posture parallel to the extending direction between the permanent magnets 16 and 26, and the second flux barrier 27b is an electromagnetic wave of the outer rotor 12. The steel plate material is formed so as to limit the passage of the magnetic flux in the region between the adjacent permanent magnets 16 and 26 while leaving the connection support region in the same manner as the center bridge 20 so that the steel plate material does not fall apart.

  In the electric rotating machine 10, the stator 11 is fixed to the inner surface of the body portion 101 of the outer case 100 so as not to rotate relative to each other. The plate-like closing members 102 and 103 for closing the space for accommodating the outer rotor 12 are attached. Further, plate-like closing members 112 and 113 for closing the space for accommodating the inner rotor 22 are attached to both ends in the rotation axis direction of the outer rotor 12 in the outer case 100.

  These closing members 102, 103, 112, and 113 are provided with bearings 31 to 34 in which insertion holes are formed at center positions corresponding to the rotation shafts 13 and 23 of the rotors 12 and 22. On the other hand, rotation shafts 23a and 23b extending both outward in the rotation axis direction are fixed to the shaft center of the inner rotor 22, and the rotation shaft is disposed on the shaft center of the outer rotor 12. A rotating shaft 13 extending only in one direction outward is fixed.

  One rotating shaft 23 a of the inner rotor 22 is rotatably supported by the outer casing 100 and the bearings 31 and 33 of the closing members 102 and 112 of the outer rotor 12, and the other rotation of the inner rotor 22. The shaft 23 b is rotatably supported by the bearing 34 of the closing member 113 on the opposite side of the outer rotor 12. Further, the rotating shaft 13 of the outer rotor 12 is rotatably supported by the bearing 32 of the closing member 103 of the outer case 100.

  As a result, the inner rotor 22 can freely rotate relatively within the outer rotor 12 by the rotation shafts 23a, 23b being rotatably supported by the closing members 112, 113 via the bearings 33, 34. . In the outer rotor 12, the closing member 112 is rotatably supported on the rotation shaft 23 a of the inner rotor 22 via a bearing 33, and the rotation shaft 23 b of the inner rotor 22 is rotatable via a bearing 34. The rotary shaft 13 is fixed to the coaxial position of the closing member 113 that is supported on the rotary shaft, and the rotary shafts 13 and 23a are rotatably supported by the closing members 102 and 103 of the outer case 100 via the bearings 31 and 32. As a result, the outer rotor 12 can also rotate freely in the outer case 100.

  Further, the inner rotor 22 is integrally fixed around the axis of the rotating shaft 23b that is disposed in the coaxial position while being not connected to the rotating shaft 13 of the outer rotor 12. A clutch member 41 for connecting or releasing the closing member 103 and the rotating shaft 23b is disposed. Of these members, the clutch member 41 is advanced and retracted in the axial direction of the rotary shaft 23b by a solenoid 42s installed on a base member 42 fixed to the rotary shaft 23b on the back side (inner rotor 22 main body side). An annular ring-shaped receiving member 44 is fixedly provided on one side of the disk-shaped support member 43 and formed in an annular shape on the side of the closing member 113 facing the clutch member 41. The clutch mechanism is configured.

  As a result, the inner rotor 22 is coupled so that the rotation shaft 23b and the rotation shaft 13 of the outer rotor 12 cannot be rotated relative to each other by the solenoid 42s pressing the clutch member 41 against the receiving member 44 on the outer rotor 12 side. It can be in a state and can be rotated together in a synchronized manner. On the contrary, the inner rotor 22 is configured such that the solenoid 42 s separates the clutch member 41 from the receiving member 44 on the outer rotor 12 side to cancel the pressure contact state, so that the rotating shaft 23 b is separated from the rotating shaft 13 of the outer rotor 12. It can be released (disconnected) and can be rotated asynchronously.

  Here, in the electric rotating machine 10, as shown in FIG. 4, the electric power P <b> 1 is supplied to the driving coil 14 on the stator 11 side by inverter control to generate a rotating magnetic field having the frequency F <b> 1, thereby causing the outer rotor 12 to move. The driving force can be output from the rotation output shaft 13 by being driven to rotate. At this time, in the electric rotating machine 10, the inner rotor 22 can also be driven to rotate, and the rotation output shaft 13 of the outer rotor 12 rotates at the frequency F1, whereas the rotation input shaft 23a rotates at the frequency F2. Will do.

In short, the inner rotor 22 is slidingly rotated with respect to the outer rotor 12, and the sliding of the inner rotor 22 is defined by the following equation (1) and is rotated from this equation (1). The frequency F2 of the input shaft 23a can be expressed as the following equation (2).
s = (F1-F2) / F1 (1)
F2 = (1-s) × F1 (2)
The permanent magnet 26 fixed to the inner peripheral surface 12b of the outer rotor 12 is constructed in an SPM (Surface Permanent Magnet) type and is driven to rotate at a frequency F1. A rotating magnetic field of F1 is generated.

  By the way, when the slip is negative, in other words, when the rotation frequency is F1 <F2, the inner rotor 22 rotates at a speed faster than the rotating magnetic field formed by the permanent magnet 26 on the outer rotor 12 side. While the outer rotor 12 is a stator, the inner rotor 22 is operating in a region where it can function as an IM rotor in an induction generator. In this case, the mechanical energy input to the rotation input shaft 23a of the inner rotor 22 can be transmitted to the outer rotor 12 after being converted into magnetic energy that rotates.

  For example, FIG. 5 shows a magnetic field analysis result (data before adjustment) with respect to a relative time difference when the sliding s = −0.5 and the rotation frequency of the outer rotor (PM rotor) 12 is 80 Hz. ing. From this graph, it can be seen that as the relative speed difference increases, the negative torque of the inner rotor (IM rotor) 22 increases and the torque of the outer rotor 12 also increases. From this, it is understood that when the slip s is negative, the torque can be increased by receiving the energy corresponding to the slip frequency sF1 received from the rotation input shaft 23a. In FIG. 5, when the relative speed difference increases to some extent, the torque tends to decrease from the maximum value. Therefore, it is necessary to appropriately control the slip to efficiently transmit power. In addition, since the electric rotating machine 10 includes the clutch member 41, the inner rotor 22 can be synchronously rotated by being connected to the outer rotor 12, and loss at the inner rotor 22 can be eliminated. For this reason, the energy loss at the time of regeneration by providing the inner rotor 22 can be eliminated, and highly efficient energy regeneration can be realized.

  From this, in the electric rotating machine 10, as shown in FIG. 4A, the DC electric energy of the battery 201 is converted into AC electric energy by the inverter 202 and the outer rotor 12 is driven to rotate. The energy can be converted into magnetic energy and output as mechanical energy as a driving force for driving the outer rotor 12 to rotate. In addition, the mechanical energy input from the rotation input shaft 23a of the inner rotor 22 can be converted to magnetic energy and transmitted to the outer rotor 12, and the magnetic energy can be transmitted as mechanical energy to the outer rotor. It can be combined with 12 mechanical energies. That is, in the electric rotating machine 10, the mechanical energy generated by the synchronous motor constructed by the stator 11 and the outer rotor 12 is transferred from the rotation input shaft 23 a to the induction motor constructed by the outer rotor 12 and the inner rotor 22. A power transmission flow for applying mechanical energy to be inputted is constructed. The electric rotor P1 is supplied to rotate the outer rotor 12 at the frequency F1, and the electric rotor P2 is supplied to rotate the inner rotor 22 at the frequency F2. By driving, the function as a drive source can be distributed and the power transmission path can be divided into two.

  For example, electric power P1 ′ is supplied to a single rotor type electric rotating machine having one stator 11 ′ and one rotor 12 ′ shown in FIG. 4B, and the driving force having the frequency F1 from the rotation output shaft 13 ′. 4A, when the single rotor type is used, electric power P1 that is about 70% of electric power P1 ′ in the case of the single rotor type is supplied and the outer rotor 12 is driven at the frequency F1. In the same manner, the power P2 that is about 30% of the power P1 ′ can be supplied to rotate the inner rotor 22 (rotational input shaft 23a) at the frequency F2. In other words, the electric rotating machine 10 distributes the electric power P1 ′ to the electric powers P1 and P2 and rotates the outer rotor 12 and the inner rotor 22, so that the rotation output shaft 13 can provide a driving force equivalent to that of the single type. It can be taken out.

  Therefore, the electric rotating machine 10 can rotate the rotation output shaft 13 by assisting the driving force of the outer rotor 12 from the inner rotor 22 at an arbitrary timing. The rotor 12 can output a desired driving force within a wide rotation speed range including high-speed rotation, and the inner rotor 22 can also be rotated and cooperated in a normal range during low-speed rotation. , Optimal wide variable speed characteristics can be realized.

  For example, as shown in FIG. 6, a motor 301 is connected to the rotation input shaft 23a, and the rotation output shaft 13 is optimally controlled by a controller (control unit) 302 so that the rotational speed of the slip rotation is negative. Power can be transmitted via a transmission 303 and a differential gear (differential gear, commonly referred to as differential) 304 connected to a drive shaft, and the rotational drive control of the wheel 305 is controlled by the outer rotor 12 and the inner rotor. Accordingly, the rotational control can be efficiently driven from the low speed range to the high speed range.

  Similarly, as shown in FIG. 7, the engine (internal combustion engine) 401 is connected to the rotation input shaft 23a, and the controller (control unit) 402 optimally controls the rotation drive, whereby the outer rotor 12 and the inner rotation Rotation drive is shared by each of the child elements 22, and the wheels 305 can be efficiently rotated from the low speed range to the high speed range via the rotation output shaft 13, the transmission 303, and the differential gear 304. As shown in FIG. 7, when the engine 401 is connected to the rotation input shaft 23a, the inner rotor 22 (rotation input shaft 23a) is integrally rotated with the outer rotor 12 by the clutch member 41. The engine 401 can also be started by rotating the outer rotor 12.

  As a specific example, a weak magnetic force magnet can be selected as the permanent magnet 16 by setting the driving performance of the outer rotor 12 to about 70%, and an increase in induced voltage in a high-speed rotation region can be suppressed. it can. For this reason, it is possible to eliminate the need for so-called weakening magnetic field control that weakens the magnetic force in the high-speed rotation region by providing a function of adjusting the magnetic force according to the rotational speed, and a wide variable speed characteristic can be obtained. . Further, since a magnet having a weak magnetic force can be selected, the cost can be reduced. Furthermore, since a permanent magnet 16 is adopted by adopting a magnet having a weak magnetic force, in order to reduce cogging torque, the so-called skew that twists the installation position of the permanent magnet 16 around the axis is omitted. Torque ripple can be reduced and electromagnetic noise of the motor can also be reduced.

  Thus, in the present embodiment, the outer rotor 12 housed in the stator 11 is externally mounted on the inner rotor 22, and the double rotor structure in which the induction motor is built in the synchronous motor is constructed. A driving force can be taken out by dividing the power transmission path into 12 and the inner rotor 22, and an electric rotation system that can be efficiently driven to rotate from a high rotation range to a low rotation range can be realized. Therefore, the motor 301 and the engine 401 can be connected to the rotation input shaft 23a, and the wheels 305 can be efficiently rotated.

  Here, since the electric rotating machine 10 can connect the drive shaft of the vehicle to the rotation output shaft 13 of the outer rotor 12 that is externally mounted on the inner rotor 22, an electric vehicle (EV) or a register extender / hybrid type vehicle. It is most suitable for vehicles equipped with a mode that runs only by a motor, such as automobiles and strong hybrid vehicles. That is, since the drive shaft is connected to the outer rotor 12 having a large rotor outer diameter, a large driving force can be obtained at the time of starting and the fuel efficiency can be improved because the driving efficiency is high. In particular, when applied to a register extender / hybrid vehicle, the transmission of vibration from the engine 401 can be reduced by connecting the output shaft of the engine 401 to the inner rotor 22 having a small rotor outer diameter. In addition, as in a conventional regi-extender / hybrid type vehicle, the mechanical energy using the engine as a drive source is converted into AC electric energy by a motor, and the AC electric energy is converted into DC electric energy via an inverter, and then the battery. After that, after converting the DC electric energy in the battery into AC electric energy that can be used by the inverter, the motor is changed to mechanical energy and the drive shaft of the vehicle is driven to rotate. The power transmission path can be shortened and transmission efficiency can be improved. Even when this power transmission path is taken into consideration, a structure in which the outer rotor 12 having a large rotor outer diameter can be connected to the drive shaft from the rotational efficiency at the time of final output, like the electric rotating machine 10, is advantageous.

  The scope of the present invention is not limited to the illustrated and described exemplary embodiments, but also includes all embodiments that provide equivalent effects to those intended by the present invention. Further, the scope of the invention is not limited to the combinations of features of the invention defined by the claims, but may be defined by any desired combination of particular features among all the disclosed features. .

  Although one embodiment of the present invention has been described so far, it is needless to say that the present invention is not limited to the above-described embodiment, and may be implemented in various forms within the scope of the technical idea.

DESCRIPTION OF SYMBOLS 10 Electric rotating machine 11 Stator 12 Outer rotor 12a Outer peripheral surface 12b Inner peripheral surface 13 Rotation output shaft 14 Drive coil 15 Stator teeth 16, 26 Permanent magnet 17 V-shaped space 17b, 27a, 27b Flux barrier 18, 28 Slot 20 Center Bridge 22 Inner rotor 22a Outer peripheral surface 23, 23a Rotation input shaft 25 Rotor teeth 26a Inner peripheral surfaces 31-34 Bearing 41 Clutch member 42s Solenoid 100 Exterior case 201 Battery 202 Inverter 301 Motor 401 Engine

Claims (5)

An electric rotating machine comprising a stator, a first rotor housed in the stator, and a second rotor housed in the first rotor,
The stator is provided with a plurality of phases of winding coils on the inner peripheral surface side,
In the first rotor, a first permanent magnet is disposed on the outer peripheral surface side, and a second permanent magnet is disposed on the inner peripheral surface side,
An excitation coil is disposed on the second rotor,
A first flux barrier extending in the circumferential direction is interposed between the first permanent magnet and the second permanent magnet of the first rotor, and the first flux barrier and a connection support region are interposed therebetween . And a second flux barrier that is adjacent to and extends in the radial direction . 2. The electric rotating machine according to claim 1, further comprising a clutch mechanism that connects or disconnects the first rotor and the second rotor. The electric rotating machine according to claim 1 or 2 is provided.
An electric rotating system, wherein an output shaft is connected to rotate integrally with the first rotor of the electric rotating machine. The electric rotating system according to claim 3 , wherein an input shaft is connected to rotate integrally with the second rotor of the electric rotating machine. Electric rotary system according to claim 3 or 4, characterized in that it comprises a control unit for sliding rotational speed relative to the first rotor of the second rotor controls the drive frequency so that the negative.

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