阅读说明：本技术 一种双移30度冗余转向电机单元 (Double-shift 30-degree redundant steering motor unit ) 是由 杜春洋 于 2020-05-18 设计创作，主要内容包括：本发明公开了一种双移30度冗余转向电机单元,包括电机壳体、电机前端盖、电机后端盖、双转子总成和接线双定子结构,所述前端盖和后端盖分别通过连接螺栓设置在电机壳体的前后两侧,定子组件设置在电机壳体内部,双转子总成嵌入接线双定子结构的内部,所述接线双定子结构设有四套独立绕组,其中,两套绕组为一组,且两组绕组在空间位置上错开电气角度30度。本发明实施四套独立绕组,如果转向系统其中一套绕组及驱动控制电路失效,剩余三套绕组在安全性上可以提供至少75%的助力,不会影响驾驶员操控方向盘,充分满足自动驾驶的安全需求。(The invention discloses a double-shift 30-degree redundant steering motor unit which comprises a motor shell, a motor front end cover, a motor rear end cover, a double-rotor assembly and a wiring double-stator structure, wherein the front end cover and the rear end cover are respectively arranged on the front side and the rear side of the motor shell through connecting bolts, the stator assembly is arranged in the motor shell, the double-rotor assembly is embedded in the wiring double-stator structure, the wiring double-stator structure is provided with four sets of independent windings, two sets of windings are one set, and the two sets of windings are staggered by 30 degrees in the spatial position. According to the invention, four sets of independent windings are implemented, if one set of windings and the drive control circuit of the steering system fail, the rest three sets of windings can provide at least 75% of assistance in safety, the steering wheel controlled by a driver is not influenced, and the safety requirement of automatic driving is fully met.)

1. The utility model provides a two 30 degrees redundancies of moving turn to motor unit, includes motor casing (1), front end housing (2), rear end housing (3), birotor assembly (4) and two stator structure of wiring (5), both sides around motor casing (1) are installed through connecting bolt (6) respectively in front end housing (2) and rear end housing (3), and two stator structure of wiring (5) set up in the inside of motor casing (1), the inside of two stator structure of wiring (5) is inlayed in birotor assembly (4), two stator structure of wiring (5) are equipped with four sets of independent windings, and wherein, two sets of windings are a set of, and two sets of windings stagger electric angle 30 degrees on spatial position.

2. A double 30 degree redundant steering motor unit according to claim 1, wherein: two stator structure of wiring (5) include two wiring stator (51), wiring stator (51) include stator core (511), wiring skeleton (512), insulating skeleton (513), binding post (514), binding post fixing base (515), and two sets of windings (6) set up inside stator core (511), insulating skeleton (513) and wiring skeleton (512) and stator core (511) looks adaptation, binding post (514) are through binding post fixing base (515) setting on wiring skeleton (512).

3. A double 30 degree redundant steering motor unit according to claim 2, wherein: the stator coils of S1-S12 are arranged in 12 slots in each wiring stator (51) in a counterclockwise mode, the 12 stator coils form two sets of windings, wherein the winding A comprises the stator coils of S1-S6, the winding B comprises the stator coils of S7-S12, S1 and S4 in the winding A are connected in series to form one phase, S2 and S5 are connected in series to form one phase, and S3 and S6 are connected in series to form one phase; in the winding B, S7 and S10 are connected in series to form one phase, S8 and S11 are connected in series to form one phase, and S9 and S12 are connected in series to form one phase.

4. A double 30 degree redundant steering motor unit according to claim 3, wherein: the relative positions of the two wiring stators (51) are staggered by 7.5 degrees.

5. A double 30 degree redundant steering motor unit according to claim 1, wherein: birotor assembly (4) are including two sets of rotor core subassemblies (41), motor shaft (42), rotor position sensor (43), fore bearing (44) and rear bearing (45), two sets of rotor core subassemblies (41) set up on motor shaft (42), and the one end of motor shaft (42) is passed through fore bearing (44) and is connected with silk claw (7) in the front end housing (2) outside, and the other end passes through rear bearing (45) and is connected with rear end housing (3), it still is equipped with rotor position sensor (43) to be close to rear bearing (45) department on motor shaft (42).

6. A double 30 degree redundant steering motor unit according to claim 5, wherein: the two sets of rotor core components (41) are staggered by a mechanical angle of 15 degrees relative to each other.

7. A double 30 degree shift redundant motor unit according to claim 6, wherein: a circular ceramic separating sheet (46) is arranged in the middle between the two sets of rotor iron core components (41).

8. A double 30 degree shift redundant motor unit according to claim 5, wherein: two sets of rotor core subassemblies (41) include magnet steel fixed bolster (411), magnet steel (412) and rotor core (413), magnet steel fixed bolster (411) set up in rotor core (413)'s periphery, and magnet steel (412) are installed on magnet steel mount (411).

9. A double 30 degree shift redundant motor unit according to claim 1, wherein: the motor is an 8-pole 12-slot motor and is driven by two independent controllers, each controller comprises a main control chip, a pre-driving module and a battery module, the output end of the main control chip is connected with the input end of the pre-driving module, and the output end of the pre-driving module is connected with the twelve-phase motor through the battery module.

10. A method for assembling a double-shift 30-degree redundant steering motor unit is characterized in that: the method comprises the following specific steps:

(1) pressing a magnetism isolating sheet (46) into the front end of the motor rotating shaft (42), simultaneously pressing a rotor iron core assembly (41) into two sides of the motor rotating shaft (42) from two sides respectively, and staggering 15-degree mechanical angles between the two rotor iron core assemblies (41) at relative positions to ensure the electrical angle characteristic of the rotor to form a double-rotor assembly (4);

(2) pressing the wiring double-stator structure (5) wound with wires into the motor shell (1), and respectively pressing a wiring stator (51) from two sides, wherein the relative position between the two wiring stators (51) is staggered by 7.5 degrees of mechanical angle, so that the electrical angle characteristic of the stator is ensured;

(3) the front end of the double-rotor assembly (4) is pressed into the front end cover (2), a front bearing (44) is riveted on the front end cover (2) in a reverse mode, meanwhile, the pressed rotor core assembly (41) is pressed into a rotor assembly whole through a press machine and an assembly, provided with the front bearing (42), of the front end cover (2), and finally the rear bearing (45) is riveted and fixed to the rotor core assembly (41);

(4) vertically fixing the wiring double-stator structure (5) on a pressing table, and vertically sending the wiring double-stator structure (5) into the wiring double-stator structure (5) by using a cylinder head to push against central holes of motor rotating shafts (42) at two ends of a rotor iron core assembly (41) to finish the assembly of the wiring double-stator structure (5) and a double-rotor assembly (4);

(5) and vertically fixing the wiring double-stator structure (5) on a pressing table, jacking the central holes of the motor rotating shafts (42) at the two ends of the rotor assembly (4) by using a cylinder head, vertically sending the wiring double-stator structure into the motor rear end cover (3), and completely assembling the wiring double-stator structure.

Technical Field

The invention relates to the technical field of automobile electric power-assisted steering systems, in particular to a double-shift 30-degree redundant steering motor unit.

Background

The electric power steering system EPS of the automobile is one of the most important assemblies on the whole automobile in relation to the personal safety of drivers and passengers, and redundant safety design must be considered to ensure that basic and controllable steering capacity can be provided under any condition. Currently, an electric power steering system EPS of an automobile is composed of an electric control part and a mechanical structure. Under the condition that the electric control part of the traditional EPS system fails, a driver can drive to steer to stop at the side immediately only through mechanical structures such as a pipe column and the like, and the safety requirements of higher levels such as automatic driving and the like cannot be met.

Disclosure of Invention

Object of the invention in view of the above-mentioned problems and disadvantages of the prior art, it is an object of the present invention to provide a double shift 30 degree redundant steering motor unit. The motor technology that the stator and the rotor of the 8-pole 12-slot double-shift 30-degree phase is adopted, support is provided for the safety of a redundancy system, and mutual counteraction of torque fluctuation from the motor technology is realized through double shift of the stator and the rotor in the space electrical angle; the mutual independence of the windings is better improved from the technical aspect of the motor; the manufacturability of motor volume production is considered in ingenious motor structural design, and a foundation is laid.

The technical scheme includes that the double-shift 30-degree redundant steering motor unit comprises a motor shell, a motor front end cover, a motor rear end cover, a double-rotor assembly and a wiring double-stator structure, wherein the front end cover and the rear end cover are respectively arranged on the front side and the rear side of the motor shell through connecting bolts, a stator assembly is arranged inside the motor shell, the double-rotor assembly is embedded into the wiring double-stator structure, four sets of independent windings are arranged in the wiring double-stator structure, two sets of windings are one set, and the two sets of windings are staggered by 30 degrees in the spatial position.

Further, the wiring double-stator structure 5 comprises two wiring stators, wherein S1-S12 stator coils are arranged in 12 slots in each wiring stator in a counterclockwise mode, and the 12 stator coils form two sets of windings, wherein the A winding comprises S1-S6 stator coils, the B winding comprises S7-S12 stator coils, S1 and S4 in the A winding are connected in series to form one phase, S2 and S5 are connected in series to form one phase, and S3 and S6 are connected in series to form one phase; in the winding B, S7 and S10 are connected in series to form one phase, S8 and S11 are connected in series to form one phase, and S9 and S12 are connected in series to form one phase.

Further, the wiring stator comprises a stator core, a wiring framework, an insulating framework, wiring terminals and wiring terminal fixing seats, wherein the two sets of windings are arranged inside the stator core, the insulating framework and the wiring framework are matched with the stator core, and the wiring terminals are arranged on the wiring framework through the wiring terminal fixing seats.

Further, the relative positions of the two wiring stators are staggered by a mechanical angle of 7.5 degrees.

Further, birotor assembly includes two sets of rotor core subassemblies, motor shaft, rotor position sensor, front bearing and rear bearing, two sets of rotor core subassemblies set up in motor shaft, and motor shaft's one end is passed through the front bearing and is connected with the front end housing, and the other end passes through the rear bearing and is connected with the rear end housing, motor shaft is last to be close to rear bearing department and still to be equipped with rotor position sensor.

Further, the two sets of rotor core components are staggered by a mechanical angle of 15 degrees relative to each other.

Furthermore, a circular ceramic separating sheet is arranged in the middle between the two sets of rotor iron core components. The characteristics of the double-moving motor rotor are realized, each section of magnetic circuit of each rotor is isolated, the real sealing on a magnetic field is achieved, and the advantage and the characteristic of effective isolation of the magnetic fields of the stator and the rotor are better reflected.

Further, the rotor core assembly comprises a magnetic steel fixing support, magnetic steel and a rotor core, the magnetic steel fixing support is arranged on the periphery of the rotor core, and the magnetic steel is installed on the magnetic steel fixing frame.

Further, the motor is an 8-pole 12-slot motor and is driven by two independent controllers, each controller comprises a main control chip, a pre-driving module and a battery module, the output end of the main control chip is connected with the input end of the pre-driving module, and the output end of the pre-driving module is connected with the twelve-phase motor through the battery module. Four sets of windings of the motor are independently designed, the insulation isolation is strong, four sets of windings are implemented, four sets of driving circuits of the double controller are equivalent to independently controlling four three-phase motors respectively, when a driver drives the motor, if one set of the windings inside the steering system fails, three quarters of power assisting can be achieved by the remaining three sets of windings, and the purpose of redundancy backup is achieved in the aspect of functional safety technology.

An assembly method of a double-shift 30-degree redundant steering motor unit comprises the following specific steps:

(1) pressing the magnetism isolating sheet at the front end of the motor rotating shaft, simultaneously pressing a rotor iron core assembly from two sides of the motor rotating shaft respectively, and staggering 15-degree mechanical angles at the relative positions between the two rotor iron core assemblies to ensure the electrical angle characteristic of the rotor so as to form a double-rotor assembly;

(2) pressing the wiring double-stator structure wound with the wire into the motor shell, respectively pressing a wiring stator from two sides, and staggering the relative position between the two wiring stators by 7.5 degrees of mechanical angle to ensure the electrical angle characteristic of the stator;

(3) the front end of the double-rotor assembly is pressed into a front end cover, a front bearing is riveted on the front end cover in a reverse mode, meanwhile, a pressed rotor core assembly and an assembly with the front bearing covered at the front end are pressed into a rotor assembly whole through a press machine, and finally a rear bearing is riveted and fixed to the rotor core assembly;

(4) vertically fixing the wiring double-stator structure on a pressing table, and vertically sending the wiring double-stator structure into the wiring double-stator structure by using a cylinder head to push against central holes of motor rotating shafts at two ends of a rotor iron core component so as to finish the assembly of the wiring double-stator structure and a double-rotor assembly;

(5) and vertically fixing the wiring double-stator structure on a pressing table, jacking the central holes of the motor rotating shafts at two ends of the rotor assembly by using the cylinder head, vertically feeding the wiring double-stator structure into a rear end cover of the motor, and completely assembling the wiring double-stator structure.

According to the technical scheme, the invention has the beneficial effects that:

(1) according to the double-shift 30-degree redundant steering motor unit, four sets of independent windings are implemented, if one set of windings and a driving control circuit of a steering system fail, the rest three sets of windings can provide at least 75% of assistance in safety, the steering wheel controlled by a driver cannot be influenced, and the safety requirement of automatic driving is fully met.

(2) The double-shift 30-degree redundant steering motor unit is a high-reliability and high-fault-tolerance multi-phase motor, and is characterized in that four sets of windings are separately separated, two sets of windings are in one set, the space phase difference between the two sets of windings is 30 electrical degrees, and the torque fluctuation of the motor is eliminated by utilizing the internal magnetic field characteristic of the motor.

(3) The double-shift 30-degree redundant steering motor unit disclosed by the invention adopts a double-rotor structure and a motor shaft, implements a technology of respectively press-mounting two rotors from two sides, and simultaneously, press-mounting positioning is simultaneously designed on two sides of the shaft, so that two rotor iron cores can be conveniently pressed into the shaft by staggering a mechanical angle of 15 degrees; the plastic wire frame for fixing the magnetic steel and the rotor core are integrated by injection molding, so that the process of gluing the magnetic steel during fixing is omitted, the magnet is convenient to fix, the process flow is simplified, and the production benefit is improved.

(4) According to the double-shift 30-degree redundant steering motor unit, the motor is a radial magnetic circuit, the magnetic isolation sheet is pressed between the two rotors of the double-rotor structure, each section of magnetic circuit of the rotors is isolated, and the magnetic field is truly sealed.

(5) According to the double-shift 30-degree redundant steering motor unit, the 8-pole 12-slot motor stator adopts a block type stator core technology, and the ingenious open type shell structure design is convenient for the double wiring stators to be respectively pressed into the motor shell from two sides; meanwhile, two stator structures are independently designed, the isolation safety of the redundant motor is reflected, the space difference of the two stators is 7.5 degrees of electrical angle, and the technical characteristic of counteracting torque fluctuation is achieved by realizing the true double shift of the electrical angle of the stators and matching with the oblique pole technology of the rotor.

Drawings

FIG. 1 is a schematic view of the external structure of the motor of the present invention;

FIG. 2 is a cross-sectional view of the motor of the present invention;

FIG. 3 is a schematic structural view of a dual rotor assembly of the present invention;

FIG. 4 is a schematic structural view of a rotor core of the present invention;

FIG. 5 is a schematic view of the construction of a stator according to the present invention;

FIG. 6 is a schematic perspective view of the wiring double-stator structure of the present invention;

FIG. 7 is a cross-sectional schematic view of a wiring double stator structure of the present invention;

FIG. 8 is a schematic view of the assembly structure of the connection stator and the motor housing according to the present invention;

FIG. 9 is a block diagram of the motor control system of the present invention;

FIG. 10 is a sectional view of the stator and rotor of the present invention;

fig. 11 is a schematic wiring diagram of a stator coil according to the present invention.

In the figure: the motor comprises a motor shell 1, a front end cover 2, a rear end cover 3, a double-rotor assembly 4, a rotor iron core assembly 41, a magnetic steel fixing support 411, magnetic steel 412, a rotor iron core 413, a motor rotating shaft 42, a rotor position sensor 43, a front bearing 44, a rear bearing 45, a magnetic isolation sheet 46, a wiring double-stator structure 5, a wiring stator 51, a stator iron core 511, a wiring framework 512, an insulating framework 513, a wiring terminal 514, a wiring terminal fixing seat 515 and a connecting bolt 6.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments.

The double-shift 30-degree redundant steering motor unit comprises a motor shell 1, a front end cover 2, a rear end cover 3, a double-rotor assembly 4 and a wiring double-stator structure 5, wherein the front end cover 2 and the rear end cover 3 are respectively installed on the front side and the rear side of the motor shell 1 through connecting bolts 6, the wiring double-stator structure 5 is arranged inside the motor shell 1, the double-rotor assembly 4 is embedded into the wiring double-stator structure 5, the wiring double-stator structure 5 is provided with four sets of independent windings, the two sets of windings are one set, and the two sets of windings are staggered by 30 degrees in the spatial position.

The wiring double stator structure 5 in this embodiment includes two wiring stators 51, each of which is connected to

The stator coils of S1-S12 are arranged in 12 slots in the linear stator in a counterclockwise mode, the 12 stator coils form two sets of windings, wherein the winding A comprises the stator coils of S1-S6, the winding B comprises the stator coils of S7-S12, S1 and S4 in the winding A are connected in series to form one phase, S2 and S5 are connected in series to form one phase, and S3 and S6 are connected in series to form one phase; in the winding B, S7 and S10 are connected in series to form one phase, S8 and S11 are connected in series to form one phase, and S9 and S12 are connected in series to form one phase.

The specific connection relationship is as shown in fig. 11, the wiring stator 51 includes a stator core 511, a wiring frame 512, an insulating frame 513, a wiring terminal 514, and a wiring terminal fixing seat 515, two sets of windings 6 are disposed inside the stator core 511, the insulating frame 513 and the wiring frame 512 are adapted to the stator core 511, and the wiring terminal 514 is disposed on the wiring frame 512 through the wiring terminal fixing seat 515.

In the present embodiment, the two connection stators 51 are shifted from each other by a mechanical angle of 7.5 degrees.

In this embodiment, birotor assembly 4 includes two sets of rotor core subassemblies 41, motor shaft 42, rotor position sensor 43, front bearing 44 and rear bearing 45, two sets of rotor core subassemblies 41 set up on motor shaft 42, and the one end of motor shaft 42 is passed through front bearing 44 and is connected with the screw claw 7 in the front end housing 2 outside, and the other end passes through rear bearing 45 and is connected with rear end housing 3, it still is equipped with rotor position sensor 43 to be close to rear bearing 45 department on the motor shaft 42.

In this embodiment, the two sets of rotor core assemblies 41 are staggered by a mechanical angle of 15 degrees relative to each other.

In this embodiment, a circular partition 46 is provided between the two sets of rotor core assemblies 41.

In this embodiment, the two sets of rotor core assemblies 41 include a magnetic steel fixing bracket 411, magnetic steel 412 and a rotor core 413, the magnetic steel fixing bracket 411 is disposed on the periphery of the rotor core 413, and the magnetic steel 412 is mounted on the magnetic steel fixing bracket 411.

In this embodiment the motor is an 8-pole 12-slot motor, and is driven by two independent controllers, the controllers include a main control chip, a pre-driving module and a battery module, the output end of the main control chip is connected with the input end of the pre-driving module, and the output end of the pre-driving module is connected with a twelve-phase motor through the battery module.

An assembly method of a double-shift 30-degree redundant steering motor unit comprises the following specific steps:

(1) pressing a magnetic shielding sheet 46 into the front end of the motor rotating shaft 42, simultaneously pressing a rotor iron core assembly 41 into two sides of the motor rotating shaft 42 respectively, and staggering 15-degree mechanical angles between the two rotor iron core assemblies 41 at relative positions to ensure the electrical angle characteristic of the rotor so as to form a double-rotor assembly 4;

(2) pressing the wire-wound wiring double-stator structure 5 into the motor shell 1, respectively pressing a wiring stator 51 from two sides, and staggering the relative position between the two wiring stators 51 by 7.5 degrees of mechanical angle to ensure the electrical angle characteristic of the stator;

(3) the front end of the double-rotor assembly 4 is pressed into the front end cover 2, a front bearing (44) is riveted on the front end cover 2 in a reverse mode, meanwhile, the pressed rotor core assembly 41 and the front end cover 2 assembly with the front bearing 42 are pressed into a rotor assembly whole through a press machine, and finally, the rear bearing 45 is riveted and fixed on the rotor core assembly 41;

(4) vertically fixing the wiring double-stator structure 5 on a pressing table, and vertically sending the wiring double-stator structure 5 into the wiring double-stator structure 5 by using a cylinder head to push against central holes of motor rotating shafts 42 at two ends of a rotor iron core assembly 41 so as to finish the assembly of the wiring double-stator structure 5 and the double-rotor assembly 4;

(5) and vertically fixing the wiring double-stator structure 5 on a pressing table, pushing the central holes of the motor rotating shafts 42 at the two ends of the rotor assembly 4 by using a cylinder head, vertically sending the wiring double-stator structure into the motor rear end cover 3, and completely assembling the wiring double-stator structure.

The present invention is not intended to limit the scope of the present invention, and various equivalents thereof which are equivalent to those of ordinary skill in the art after reading the present invention are intended to fall within the scope of the present invention as defined by the appended claims.