JP4240222B2 - Steer-by-wire system - Google Patents

Description

  The present invention relates to a steer-by-wire system.

In general, in a steer-by-wire system, a steering motor and a steering wheel are mechanically separated from each other, and a steering motor mechanically coupled to the steering wheel and a steering motor mechanically coupled to the steering wheel are driven by a drive control circuit. By controlling, the steering wheel can be steered according to the operation of the steering wheel. In the steer-by-wire system, since the steering wheel and the steering wheel are mechanically separated from each other, the reliability of the motor circuit including the motor and its drive control circuit is required. The thing which provided the property is known (for example, refer patent document 1).
Japanese Unexamined Patent Publication No. 2003-200840 ([0011], FIG. 1)

  By the way, it is unlikely that the motor circuit becomes inoperable because it is unlikely that all the parts related to the motor circuit will be lost at one time. For example, the failure of only the control drive circuit in the motor circuit, or from the battery to the control drive circuit. The failure of only the power feeding portion of the motor, the failure of only a part of the parts related to the motor circuit, and the like can be considered. However, in the conventional steer-by-wire system, triple redundancy is provided in the entire motor circuit in preparation for the failure of only a part of the parts related to the motor circuit. For this reason, it is difficult to combine a component that operates the steer-by-wire system at the normal time and a component that operates the steer-by-wire system at the time of abnormality, and it is difficult to reduce costs and installation space.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a steer-by-wire system capable of reducing the cost and installation space as compared with the prior art and achieving reliability against a failure of a required part.

The steer-by-wire system according to the first aspect of the present invention, which has been made to achieve the above object, mechanically separates the steering wheel from the steering wheel and mechanically connects the steering wheel to the steering wheel, In a steer-by-wire system that enables steering wheels to be steered according to the operation of the steering wheel by controlling the driving of the steering wheel rotating machine as an electric motor by a drive control circuit, the steering rotating machine and the steering wheel rotation same machine may form a structure having a wound on both the stator and the rotor, the windings of the drive uncontrollable failure sometimes rotors as an electric motor to steering rotating machine and a rotating machine handle by the drive control circuit a rotor feeder circuit for feeding the alternating current, by providing a stator connections circuit connecting the windings to each other of the failure during the two stators, rolling upon the failure Use rotating machine and a rotating machine handle has a feature where the constituting synchro Electric.

According to a second aspect of the invention, the steer-by-wire system according to claim 1, and the winding of the scan stator in steering rotating machine into two systems, provided with a drive control circuit for each their respective systems, respectively, the handle This is characterized in that the stator windings in the rotating machine for a motor are divided into two systems and a drive control circuit is provided for each system .

  According to a third aspect of the present invention, in the steer-by-wire system according to the second aspect, the rotor power feeding circuit is configured to connect an alternator provided in the vehicle and a winding of the rotor.

  According to a fourth aspect of the present invention, in the steer-by-wire system according to any one of the first to third aspects, both rotors are permanently provided as fields for driving the turning rotating machine and the steering wheel rotating machine by the drive control circuit. It is characterized by the fact that a magnet is provided.

  According to a fifth aspect of the present invention, in the steer-by-wire system according to any one of the first to third aspects, when a drive control circuit is normal, a direct current is passed through the winding of the rotor, and the winding is turned into a turning rotary machine and It is characterized in that it is also used as a field for driving and controlling the steering wheel rotating machine.

  According to a sixth aspect of the present invention, in the steer-by-wire system according to any one of the first to fourth aspects, the turning rotating machine and the steering rotating machine are provided with a rotating transformer for supplying power to the rotor windings. It has features.

[Invention of Claim 1]
According to the configuration of the steer-by-wire system according to the first aspect, in a normal state, the drive control circuit drives and controls the turning rotating machine and the steering wheel rotating machine as an electric motor, and the turning power is applied to the turning system according to the driving situation. And a reaction force can be applied to the steering system. On the other hand, in the event of a failure that can not be driven and controlled by the drive control circuit using the steering rotating machine and the steering wheel rotating machine , the same AC current is applied to the windings of both the steering rotating machine and the steering wheel rotating machine. Is supplied, and the windings of the two stators are connected to each other to form a cell synchronizer (synchronous electric machine), and the steering wheel can be steered by operating the steering wheel. As described above, according to the steer-by-wire system of the present invention, the steering rotating machine and the steering wheel rotating machine that are normally used as an electric motor are also used as a serthine in the event of an abnormality. It is possible to reduce the installation space and to achieve reliability against a failure of a required part.

[Invention of claim 2]
In the steer-by-wire system according to the second aspect, since the windings and the drive control circuits of both the stators of the turning rotating machine and the steering rotating machine are made into two systems, the reliability is improved.

[Invention of claim 3]
In the steer-by-wire system according to claim 3, since alternating current is supplied to the rotor winding from an alternator that operates independently of the battery, a serthin is formed even if the battery is lost, and the steering wheel is steered by operating the steering wheel. Can do.

[Invention of claim 4]
In the steer-by-wire system according to the fourth aspect, the permanent magnet can be used as a magnetic field in normal times, and the turning rotary machine and the steering rotary machine can be used as the electric motor.

[Invention of claim 5]
In the steer-by-wire system according to the fifth aspect, since the winding provided in the rotor is used both in the normal time and in the abnormal time, further parts can be shared, and the cost and installation space can be reduced.

[Invention of claim 6]
In the steer-by-wire system according to the sixth aspect, since the rotating machine for steering and the rotating machine for the steering wheel are provided with a rotating transformer for supplying power to the windings of each rotor, durability is improved as compared with those having a brush. To do.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an overall configuration of a steer-by-wire system 10 according to the present invention. In this steer-by-wire system 10, the handle 11 and the steering wheels 41, 41 are mechanically separated, and a reaction force generator 13 is connected to the tip of the steering shaft 12 extending from the center of the handle 11. A rotation angle sensor 16 and a torque sensor 17 are also connected to the steering shaft 12, and the rotation angle and steering reaction force of the handle 11 can be detected by these sensors 16 and 17.

  As shown in FIG. 2, the reaction force generator 13 is provided with a steering wheel rotating machine 42 having a rotating shaft orthogonal to the steering shaft 12. The worm gear 18 is fixed to the rotor 45 of the steering wheel rotating machine 42, and the worm gear 18 meshes with the worm wheel 19 fixed to the rotating shaft of the steering shaft 12. Then, by driving the steering wheel rotating machine 42, a predetermined steering reaction force is applied to the steering wheel 11.

  As shown in FIG. 1, a steering device 31 is provided between the left and right steering wheels 41, 41. The turning device 31 has a structure in which a turning rotary machine 32 is integrated with a ball screw mechanism. Specifically, as shown in FIG. 2, the rotor 35 provided in the turning rotating machine 32 has a through hole formed in the shaft center portion, and a ball screw nut 29N is fixed to the through hole. Yes. The ball screw 29 is screwed and penetrated inside the ball screw nut 29N, and left and right steering wheels 41 are connected to both ends of the ball screw 29 as shown in FIG. Then, when the ball screw nut 29N rotates together with the rotor 35, the ball screw 29 moves linearly in the lateral direction of the vehicle, whereby the steering wheels 41 and 41 are steered. The steering device 31 is provided with a steering angle sensor 31S for detecting the steering angle of the steering wheels 41, 41.

  The steering rotating machine 32 and the steering wheel rotating machine 42 function as a motor that is rotationally driven as described above, and also function as a cell synchronizer (synchronous electric machine) that is interlocked with each other. Specifically, the stator 33 of the turning rotary machine 32 is provided with a plurality of teeth 33T, and a winding 34 is constituted by a plurality of coils wound around the teeth 33T. Specifically, the winding 34 is composed of, for example, three electric wires that are Y-connected. And, by winding these three electric wires around each tooth 33T, the U-phase, V-phase, W-phase, u-phase, v-phase, w-phase (U-phase and u-phase are the same electric wires and the winding direction is the same. A plurality of coils of V phase and v phase, and W phase and w phase) are formed, and a winding 34 is constituted by these coils.

  The ECU 28 (see FIG. 1) provided in the vehicle has a steering control circuit 22 (corresponding to the “drive control circuit” of the present invention) for exciting the winding 34 of the stator 33 in the steering rotating machine 32. Is provided. As shown in FIG. 3, the steering control circuit 22 includes a three-phase bridge circuit 22R of FET, and three electric wires 22S extending from the three-phase bridge circuit 22R are connected to three electric wires constituting the winding 34. Has been. The three-phase bridge circuit 22R converts the direct current output from the battery 40 into a three-phase alternating current and excites the winding 34.

  As shown in FIG. 4, the rotor 35 of the turning rotating machine 32 includes a plurality of teeth 35T on the outer peripheral surface. A plurality of (for example, 14) permanent magnets 36 for field are fixed to the tip surface of each tooth 35T. In these permanent magnets 36, a magnetic flux (arrow in FIG. 4) is directed in the radial direction of the rotor 35, and the directions of the magnetic fluxes between adjacent permanent magnets 36 are opposite to each other. With the above configuration, the turning rotating machine 32 functions as an electric motor (more specifically, a three-phase brushless motor) by exciting the winding 34 of the stator 33 to rotate the rotor 35.

  As shown in FIG. 2, the steering wheel rotating machine 42 has the same configuration as the steering rotating machine 32, and includes a three-phase AC winding 44 on the teeth 43 </ b> T of the stator 43. Connected to the winding 44 is a reaction force control circuit 21 (corresponding to the “drive control circuit” of the present invention) for converting the direct current output from the battery 40 into a three-phase alternating current and feeding the winding 44 with power. Has been. Further, the rotor 45 is provided with a field permanent magnet 46. With these configurations, the handle rotating machine 42 can also drive the rotor 45 by causing a three-phase alternating current to flow through the winding 44 of the stator 43 and function as an electric motor.

  The steered rotating machine 32 includes a winding 37 on the rotor 35 in order to function as a serthin. Specifically, as shown in FIG. 4, the winding 37 is composed of a plurality of coils wound around each tooth 35T of the rotor 35, and these coils sequentially wind one electric wire around each tooth 35T. In addition, the winding direction is reversed between adjacent teeth 35T. Further, as shown in FIG. 2, both ends of the winding 37 are connected to a pair of conductive rings 38 </ b> R and 38 </ b> R that rotate integrally with the rotor 35. Brushes 38B and 38B fixed to the stator 33 are slidably in contact with these conductive rings 38R and 38R.

  Similarly, the handle rotating machine 42 includes a winding 47 on the rotor 45. Both ends of the winding 47 are connected to a pair of conductive rings 48R and 48R that rotate integrally with the rotor 45, and the brushes 48B and 48B fixed to the stator 43 side slide on these conductive rings 48R and 48R. Contact is possible.

  Now, in order to form a serthin by the turning rotary machine 32 and the steering wheel rotating machine 42, the winding 34 of the stator 33 in the steering rotating machine 32 and the winding of the stator 43 in the steering wheel rotating machine 42. 44 is connected to the inter-stator connection circuit 24 according to the present invention, and the winding 34 of the rotor 35 in the steering rotating machine 32 and the winding 44 of the rotor 45 in the steering rotating machine 42 are the present invention. Is connected to the rotor power supply circuit 26 according to FIG.

  The inter-stator connection circuit 24 is formed by connecting the windings 34 and 44 of both the stators 33 and 43 of the steering rotating machine 32 and the steering wheel rotating machine 42 with, for example, three connecting lines 24L. . Further, the three AC output wires of the steering control circuit 22 and the reaction force control circuit 21 described above are connected to a middle portion of these connection lines 24L. An inter-stator switch 25 is provided between a common connection portion with the inter-stator connection circuit 24 in the connection line 24 </ b> L and a common connection portion with the reaction force control circuit 21. The inter-stator switch 25 is, for example, a B contact, and is opened when receiving power, and is closed when no power is supplied due to a failure of the battery 40 or the like.

  The rotor power supply circuit 26 has a pair of power supply lines 26 </ b> A and 26 </ b> B connected to a pair of AC output terminals of the alternator 23. Then, one brush 38B of the steering rotating machine 32 and one brush 48B of the steering wheel rotating machine 42 are connected in parallel to one AC output terminal of the alternator 23 by one power supply line 26A, and the other The other brush 38B of the steering rotating machine 32 and the other brush 48B of the steering wheel rotating machine 42 are connected in parallel to the other AC output terminal of the alternator 23 by the power supply line 26B. The power supply lines 26A and 26B are provided with an alternator connection switch 27 capable of disconnecting the brushes 38B and 48B from the alternator 23 together. This alternator connection switch 27 is also a B contact, for example, and is closed when the battery 40 is lost.

  Next, the operation and effect of the steer-by-wire system 10 of the present embodiment configured as described above will be described. When the ignition of the vehicle is turned on, the ECU 28 receives power from the battery 40 and supplies power to the inter-stator switch 25 and the alternator connection switch 27, which are B contacts, and keeps the switches 25 and 27 open. When the vehicle travels, the ECU 28 causes a drive current to flow from the steering control circuit 22 to the turning rotary machine 32 in accordance with the rotation angle of the handle 11 detected by the rotation angle sensor 16. Thereby, the steering wheel 41 is steered according to the rotation angle of the handle 11. Further, the ECU 28 causes a driving current to flow from the reaction force control circuit 21 to the steering wheel rotating machine 42 in accordance with the driving conditions such as the vehicle speed and the turning angle. Thereby, a steering reaction force is applied to the steering shaft 12, and a steering feeling corresponding to the driving situation can be provided.

  When the ECU 28 (including the reaction force control circuit 21 and the turning control circuit 22), the battery 40, the turning angle sensor 31S, or the rotation angle sensor 16 fails during traveling, the stator that is the B contact is used. The power supply to the intermediate switch 25 and the alternator connection switch 27 is stopped, and the switches 25 and 27 are closed. Then, the windings 34 and 44 of the stators 33 and 43 in the steering rotating machine 32 and the steering wheel rotating machine 42 are connected to each other, and the windings 37 and 47 of the rotors 35 and 45 are connected to the windings 37 and 47 from the alternator 23. The same alternating current is caused to flow by power supply, and a cell thin is formed. Thereby, the interlocking state of the steering rotating machine 32 and the steering wheel rotating machine 42 can be maintained.

  Specifically, when the driver steers the handle 11, the rotor 45 of the handle rotating machine 42 rotates accordingly, and electric power is induced in the winding 44 of the stator 43 in the handle rotating machine 42. In response, the rotor 35 of the turning rotary machine 32 is rotationally driven. Thereby, the steering wheels 41 and 41 are steered with the operation of the handle 11. Further, when an external force that changes the direction of the steering wheels 41, 41 is received by a groove on the road surface, an external load torque is applied to the rotor 35 of the steering rotating machine 32, and a reaction force is applied to the steering wheel rotating machine 42. For transmission, the driver can obtain road information such as road grooves. As a result, even if the ECU 28 or the battery 40 or the like is lost during traveling, the steering wheel 41 can be steered by operating the steering wheel 11 and the vehicle can be driven to move to a predetermined place (safe road shoulder). .

  As described above, according to the configuration of the steer-by-wire system 10 of the present embodiment, the steering rotating machine 32 and the steering wheel rotating machine 42 are driven and controlled as an electric motor during normal times, and a steering force is applied to the steering system. It is possible to apply a reaction force to the steering system. Further, a power system and a control system (for example, the reaction force control circuit 21 and the steering control circuit 22) and the sensors 16, 17, and 31S for controlling the turning of the steering rotating machine 32 and the steering wheel rotating machine 42 as electric motors. When the failure occurs, the steering rotating machine 32 and the steering wheel rotating machine 42 constitute a serthin, and the interlocking state between the steering wheel 11 and the steering wheel 41 can be maintained. That is, since the steering rotating machine 32 and the steering wheel rotating machine 42 that are normally used as electric motors are also used as a serthine in the event of an abnormality, the parts can be shared, and the required parts can be reduced while reducing costs and installation space. It becomes possible to achieve reliability against the failure of In addition, since alternating current flows from the alternator 23 that operates independently of the battery 40 to the windings 37 and 47 of the rotors 35 and 45, a serthin is formed even if the battery 40 is lost, and the steering wheel 41 is operated by operating the handle 11. Can be steered. In addition, the present invention is excellent in this respect because it becomes inoperable when a battery is lost in the conventional steer-by-wire system.

  In the configuration of the present embodiment, for example, when the alternator 23 or the windings 37 and 47 of the rotors 35 and 45 are lost, it is not possible to configure a cell thin. However, since the rotors 35 and 45 are provided with permanent magnets 36 and 46, if the handle 11 is operated in a state where the windings 34 and 44 of the stators 33 and 43 are connected to each other, the handle rotating machine 42 is The turning rotary machine 32 is driven by the electric power generated as the generator, and the steering wheels 41 and 41 are turned.

[Second Embodiment]
The steer-by-wire system 10A of the present embodiment is shown in FIG. 5 and differs from the steer-by-wire system 10 of the first embodiment in the configuration of each rotor in the turning rotating machine 32 and the steering wheel rotating machine 42. Hereinafter, only the configuration different from that of the first embodiment will be described, and the same configuration will be denoted by the same reference numeral, and redundant description will be omitted.

  The rotors 35A and 45A of the steering rotating machine 32 and the steering wheel rotating machine 42 of this embodiment are not provided with the permanent magnets 36 and 46 described in the first embodiment, and only the windings 37 and 47 are provided. Is provided. A DC power supply 50 is connected in parallel with the alternator 23 to the rotor power supply circuit 26 for supplying power to the windings 37 and 47. The alternator connection switch 27 can excite the windings 37 and 47 by supplying a direct current from the DC power supply 50 with the alternator 23 disconnected from the windings 37 and 47.

  Note that the DC power supply 50 is constituted by, for example, a DC-DC converter that transforms the output of the battery 40, and when an abnormality occurs, the switch element (not shown) provided in the DC-DC converter is opened. Disconnected from the alternator 23.

  In the steer-by-wire system 10A of the present embodiment, the stator-to-stator switch 25 and the alternator connection switch 27 are normally opened, and the winding 37, A direct current is passed through 47. Thereby, magnetic flux distribution similar to the case where the permanent magnets 36 and 46 of the first embodiment are provided is generated on the outer surfaces of the rotors 35A and 45A. The windings 34 and 44 on the side of the stators 33 and 43 are excited by a three-phase alternating current output from the reaction force control circuit 21 and the steering control circuit 22, thereby turning the steering rotary machine 32 and the steering wheel rotary machine 42. Are driven as an electric motor. As a result, it is possible to apply a steering force to the steering system and to apply a reaction force to the steering system during normal operation. On the other hand, when the required part fails, the inter-stator switch 25 and the alternator connection switch 27 are closed and the DC power supply 50 is stopped, and an alternating current is supplied from the alternator 23 to the windings 37 and 47 of the rotors 35A and 45A. Accordingly, as in the first embodiment, the turning rotary machine 32 and the handle rotary machine 42 constitute a serthin.

  As described above, according to the steer-by-wire system 10A of the present embodiment, the windings 37 and 47 provided on both the rotors 35A and 45A in the turning rotating machine 32 and the steering wheel rotating machine 42 are both normal and abnormal. Therefore, the parts can be further shared, and the cost and installation space can be reduced. In addition, it is possible to prevent a problem that the motor output is reduced due to magnet demagnetization as compared with a rotor having a permanent magnet as a field.

[Third Embodiment]
A steer-by-wire system 10B of this embodiment is shown in FIGS. 6 and 7, and the windings 34 of both stators 33, 43 in the turning rotating machine 32 and the steering wheel rotating machine 42 in the first embodiment. 44 has two systems, and a reaction force control circuit, a turning control circuit, and an inter-stator switch are provided for each system.

  Specifically, as shown in FIG. 7, the stator 33 of the turning rotating machine 32 includes, for example, twelve teeth 33T, one coil 20U to 20W for each of the teeth 33T, 20u-20w, 30U-30W, 30u-30w are provided. And these coils are coils 20U to 20W and 20u to 20w constituting the first winding 34A (see FIG. 6) excited by the first system steering control circuit 22A (see FIG. 6), The second system is divided into coils 30U to 30W and 30u to 30w constituting the second system winding 34B (see FIG. 6) excited by the steering control circuit 22B (see FIG. 6). The stator 33 is equally divided into two regions S1 and S2, and the coils 20U to 20W and 20u to 20w constituting the first-system winding 34A are wound around the six teeth 33T in the region S1 on one side. The coils 30U to 30W and 30u to 30w constituting the second-system winding 34B are wound around the six teeth 33T in the other region S2. Similarly to the steering rotating machine 32, the stator 43 in the steering wheel rotating machine 42 is also provided with a first system winding 44A and a second system winding 44B. The first system winding 44A is excited by the first system reaction force control circuit 21A, while the second system winding 44B is excited by the second system reaction force control circuit 21B.

  In addition, between the turning rotating machine 32 and the steering wheel rotating machine 42, the first system windings 34A and 44A are connected to the first system inter-stator connection circuit 24A, and the second system winding. The wires 34B and 44B are connected to the inter-stator connection circuit 24B for the second system. Further, inter-stator switches 25A and 25B are provided in the middle of the inter-stator connection circuits 24 and 24B, respectively.

  In addition, unlike the ball screw structure of the steering device 31 of the first embodiment, the steering device of the present embodiment has a rack and pinion structure. Specifically, in the present embodiment, a rack 62 is passed between the steering wheels 41, 41, and a pinion gear 63 is engaged with the rack 62. A worm wheel 64 is fixed to the rotation shaft of the pinion gear 63, and a worm gear 65 is fixed to the rotation shaft 35S of the turning rotary machine 32. The worm wheel 64 and the worm gear 65 are connected to each other. Meshed.

  In the present embodiment, the alternator connection switch 27 and the both stator switches 25A and 25B are normally opened to excite the first and second systems of windings 34A, 44A, 34B, and 44B and to steer. A steering force according to the driving situation is applied to the system, and a reaction force is applied to the steering system.

  Further, when at least one of the first system reaction force control circuit 21A or the steering control circuit 22A becomes abnormal and the second system reaction force control circuit 21B and the steering control circuit 22B are normal, Only the second system windings 34B and 44B are excited by the second system reaction force control circuit 21B and the steering control circuit 22B, and the steering system is given a steering force according to the driving situation to the steering system. Give reaction force. Conversely, at least one of the second system reaction force control circuit 21B or the steering control circuit 22B or each of the sensors 16, 17, 31S becomes abnormal, and the first system reaction force control circuit 21A and the steering control circuit 22A. Is normal, the first system reaction force control circuit 21A and the turning control circuit 22A excite only the first system windings 34A and 44A, and the turning system according to the driving situation is excited. A steering force is applied, and a reaction force is applied to the steering system.

  Then, at least one of the first system reaction force control circuit 21A or the steering control circuit 22A becomes abnormal, and at least one of the second system reaction force control circuit 21B or the steering control circuit 22B becomes abnormal. In this case, both the alternator connection switch 27 and both the stator switches 25A and 25B are closed, and the turning rotating machine 32 and the steering wheel rotating machine 42 are caused to function as a cell sink.

  Thus, in the steer-by-wire system 10B of the present embodiment, the windings 34A, 34B, 44A, 44B of the stators 33, 43 in the steering rotating machine 32 and the steering wheel rotating machine 42, reaction force control circuits 21A, 21B, Since the turning control circuits 22A and 22B and the inter-stator switches 25A and 25B are provided in two systems, the reliability is improved.

[Fourth Embodiment]
A steer-by-wire system 10C of the present embodiment is shown in FIG. 8, and in the steer-by-wire system 10B of the third embodiment, a pair of alternators 23 are connected in parallel to the rotor power supply circuit 26 and an alternator connection switch 27 is paired. It has a structure prepared. If at least one of the first system reaction force control circuit 21A or the steering control circuit 22A and at least one of the second system reaction force control circuit 21B or the steering control circuit 22B fail, In order to cause the rudder rotating machine 32 and the steering wheel rotating machine 42 to function as serthin, both the alternator connection switches 27 and 27 and the stator switches 25A and 25B are both closed. As a result, even if any one of the alternators 23 fails, it can function as a sercine. Further, even if both alternators 23 and 23 fail, since both rotors 35 and 45 are provided with permanent magnets 36 and 46, as described in the first embodiment, it is possible to operate by steering operation. The steering wheels 41, 41 can be steered.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the said 3rd Embodiment, the structure which distributedly arrange | positioned the coil of the 1st system and the coil of the 2nd system to the several teeth with which the stator was arrange | positioned as a structure which makes the winding of a stator 2 systems. However, for example, the first system coil is wound on the base side of each tooth provided in the stator, and the second system coil is wound on the tip end side of the tooth so as to overlap the first system coil. May be.

  (2) Also, a stator having only the first system coil and another stator having only the second system coil are fixed side by side in the axial direction, and a common rotor is fitted inside these two stators. You may make it the structure which carried out.

  (3) In each of the above embodiments, the steering rotator 32 and the steering rotator 42 are provided with the brushes 38B and 48B for supplying power to the windings of the rotors. It is possible to improve durability by adopting a configuration including the above.

The conceptual diagram of the steer-by-wire system which concerns on 1st Embodiment of this invention. Conceptual diagram showing a structure that can connect a steering rotating machine and a steering wheel rotating machine FET 3-phase bridge circuit in control circuit Cross section of rotor Conceptual diagram of steer-by-wire system according to the second embodiment Conceptual diagram of steer-by-wire system according to the third embodiment Sectional view showing stator winding structure Conceptual diagram of steer-by-wire system according to the fourth embodiment

Explanation of symbols

10, 10A to 10C Steer-by-wire system 11 Handle 21, 21A, 21B Reaction force control circuit 22, 22A, 22B Steering control circuit 23 Alternator 24 Inter-stator connection circuit 26 Rotor feeding circuit 32 Steering rotating machine 33, 43 Stator 34 , 34A, 34B Winding 44, 44A, 44B Winding 35, 45, 35A, 45A Rotor 36, 46 Permanent magnet 37, 47 Winding 40 Battery 41 Steering wheel 42 Rotating machine for handle

Claims (6)

The steering wheel and the steering wheel are mechanically separated, and the steering rotating machine mechanically connected to the steering wheel and the steering wheel rotating machine mechanically connected to the steering wheel are driven and controlled as a motor by a drive control circuit. In the steer-by-wire system that enables the steering wheel to be steered according to the operation of the handle,
The steering rotating machine and the steering wheel rotating machine have a structure including windings on both the stator and the rotor,
A rotor feeder circuit for feeding the same alternating current to the winding of the at driving uncontrolled failure of the rotating machine and a rotating machine the handle for the steering as an electric motor rotors by said drive control circuit, the failure In some cases, by providing an inter-stator connection circuit that connects the windings of the two stators, the turning rotating machine and the steering wheel rotating machine constitute a synchro electric machine when the failure occurs. Steer-by-wire system. And said winding before kissing stator in the steering rotating machine into two systems, provided with the drive control circuit for each their respective systems, respectively, the winding of the stator in the rotary machine the handle 2 The steer-by-wire system according to claim 1 , wherein the drive control circuit is provided for each of the systems.   The steer-by-wire system according to claim 2, wherein the rotor power supply circuit is configured to connect an alternator provided in a vehicle and a winding of the rotor.   4. A permanent magnet is provided on each of the rotors as a field for driving the turning rotating machine and the steering wheel rotating machine by the drive control circuit. Steer-by-wire system.   When the drive control circuit is normal, a direct current is passed through the winding of the rotor, and the winding is also used as a field for driving and controlling the steering rotating machine and the steering wheel rotating machine. A steer-by-wire system according to any one of claims 1 to 3.   5. The steer-by-wire system according to claim 1, wherein the steering rotating machine and the steering wheel rotating machine are each provided with a rotating transformer for supplying power to the winding of the rotor. .

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