阅读说明：本技术 一种电动车 (Electric vehicle ) 是由 李宙按 陈学齐 于 2021-06-08 设计创作，主要内容包括：本发明提供了一种电动车,包括车身,装配于车身上的车轮,以及带动车轮运动的电机,所述电机通过绕制绕组,实现定子和转子的运动,所述电机的定子铁芯上具有用于装配绕制线圈的定子槽,所述绕制线圈绕制于所述定子槽上,所述定子槽的槽宽为现有定子槽槽宽的2-4倍；还包括电机控制电路以及驱动电路,所述驱动电路通过可控线圈围绕固定线圈转动的方式,实现电机的驱动,而所述电机控制电路通过采集电机运行中的采样,以及电机扭力,进而控制驱动电路,实现对于车轮运行中的控制。本发明中,利用绕制绕组形成电机,同时配合对应的槽宽以及控制方式,使得电动车的电机启动,以及整个控制,更方便。(The invention provides an electric vehicle, which comprises a vehicle body, wheels assembled on the vehicle body and a motor driving the wheels to move, wherein the motor realizes the movement of a stator and a rotor by winding a winding, a stator core of the motor is provided with a stator slot for assembling a wound coil, the wound coil is wound on the stator slot, and the slot width of the stator slot is 2-4 times of that of the existing stator slot; still include motor control circuit and drive circuit, drive circuit realizes the drive of motor through controllable coil around fixed coil pivoted mode, and motor control circuit is through gathering the sampling of motor operation to and motor torsion, and then control drive circuit, the realization is to the control in the wheel operation. According to the invention, the motor is formed by winding the winding, and the corresponding slot width and the control mode are matched, so that the motor of the electric vehicle is started and the whole control is more convenient.)

1. An electric vehicle, which comprises a vehicle body, wheels assembled on the vehicle body and a motor driving the wheels to move, and is characterized in that,

the motor realizes the movement of the stator and the rotor by winding a winding,

the stator core of the motor is provided with a stator slot for assembling a wound coil, the wound coil is wound on the stator slot, and the slot width of the stator slot is 2-4 times of that of the existing stator slot;

still include motor control circuit and drive circuit, drive circuit realizes the drive of motor through controllable coil around fixed coil pivoted mode, and motor control circuit is through gathering the sampling of motor operation to and motor torsion, and then control drive circuit, the realization is to the control in the wheel operation.

2. The electric vehicle of claim 1, wherein the motor further comprises a rotor core, a rotor slot for filling the rotor winding is formed in the rotor core, a through slot is formed in the rotor slot in a direction close to the center of the circle, and a fastener is detachably arranged on the through slot.

3. The electric vehicle according to claim 2, wherein the through groove comprises a necking structure and an expanding structure from the installation perspective, the necking structure is arranged close to the circle center and forms a guide port of the winding, and the expanding structure forms a containing cavity of the winding.

4. The electromotive vehicle according to claim 3, wherein the stator slot has an elongated structure, the rotor slot has a squat structure, and the opening direction of the stator slot is opposite to the opening direction of the rotor slot.

5. An electric vehicle according to claim 4, characterized in that the windings in the rotor slots are wound from outside to inside with coils and the windings in the stator slots are wound from inside to outside with coils.

6. An electric vehicle according to claim 1, further comprising a hub for rotating the motor shaft, the hub comprising at least a first hub adjacent the outer side and a second hub adjacent the inner side, the first hub being integrally formed with a protective structure adjacent at least the outer side, the protective structure protecting the motor and the motor shaft, respectively.

7. The electric vehicle of claim 6, further comprising a fitting part integrally provided at an outer side of the first hub, the fitting part being used for fitting of the motor shaft, and an inductor generating an induced rotational force with the winding being fitted in the fitting part.

8. The electric vehicle according to claim 1, wherein the motor control circuit controls the motor by means of a plurality of sampling units and prestored parameters and instructions corresponding to the sampling units in the motor control circuit, and matching the corresponding instructions when the parameters collected by the sampling units are abnormal.

9. An electric vehicle according to claim 8, wherein the pre-stored parameters comprise at least current, stator speed, and motor torque parameters.

10. The electric vehicle of claim 9, wherein the sampling unit is a pre-stressed sheet for sampling the torque parameters of the motor, and the pre-stressed sheet is integrally fixed on the motor shaft to realize corresponding sampling.

Technical Field

The invention relates to the field of electric vehicle driving, in particular to an electric vehicle.

Background

Among the prior art, the drive and the control of electric motor car mainly lean on motor and the control assembly who corresponds, however, among the prior art, the wheel subassembly (rotor subassembly) of in-wheel motor is the in-wheel motor commonly used, and the only magnet steel of in-wheel motor does not coil, leads to the speed isoparametric of intelligent regulation motor, and the wayward is electric motor car speed.

Meanwhile, in the prior art, for the driving circuit of the motor and the motor itself, there are only magnets and coils mostly, that is, the corresponding control is performed by controlling the distance between the magnets and the coils, and when the driving mode of the coils and the coils is adopted, on one hand, the two coils are not easy to adjust and control, on the other hand, the corresponding parameters can not be well collected, the whole control is realized, mainly the rotor and the stator are adopted, and the measurement of the torque force is lacked.

Disclosure of Invention

The invention aims to provide an electric vehicle, which overcomes the defect that a rotor assembly of a traditional hub motor is only provided with magnetic steel, and can not intelligently adjust the speed and other parameters of the motor in the working process; the driving mode that the coil drives the coil is increased, corresponding acquisition parameters are matched, the motor torsion is also increased, and the controllability of the motor is improved.

To achieve the above object, the present invention is achieved by the following technical means.

An electric vehicle comprises a vehicle body, wheels assembled on the vehicle body, and a motor driving the wheels to move, wherein the motor realizes the movement of a stator and a rotor by winding a winding,

the stator core of the motor is provided with a stator slot for assembling a wound coil, the wound coil is wound on the stator slot, and the slot width of the stator slot is 2-4 times of that of the existing stator slot;

still include motor control circuit and drive circuit, drive circuit realizes the drive of motor through controllable coil around fixed coil pivoted mode, and motor control circuit is through gathering the sampling of motor operation to and motor torsion, and then control drive circuit, the realization is to the control in the wheel operation.

In the technical scheme, the motor formed by winding the winding can be correspondingly adjusted according to the number of coils in the winding, and the like, so that the effects of intelligently adjusting the speed of the motor and the like are conveniently realized, and the control of the whole electric vehicle is more intelligent.

In the technical scheme, when the rotor and the stator both adopt a coil winding mode, the limitation of an application scene is limited, the slot width of a rotor slot in a rotor assembly is generally small and is usually 1cm, and the coils in the mode are few, so that the torque of a motor in work is insufficient, and a place with high-speed requirement cannot be applied; at the moment, in order to realize the optimization problem, the slot width of the rotor slot can be selected to be increased, while the existing stator slot has narrower slot width and less winding number, so that the slot width of the stator slot is 2-4 times of the slot width of the existing stator slot; if the slot width of the stator slot is too large, the coil of the stator winding is too much, which easily causes an infinite amount of magnetic flux and influences normal use.

In this technical scheme, specifically, to drive circuit and motor, all can adopt a coil to rotate, the static mode of a coil for when motor body, be the coil on the rotor and rotate, the static mode of coil of stator, and then through a coil quiet, the mode that a coil moves realizes whole control, and when carrying out relevant control, rotate to the coil, drive the drive for the rotor of motor rotates around the stator, realizes ultimate drive.

In the technical scheme, the collected motor has more related parameters, so that during control, the precision is higher, and the control of the whole process, the whole utilization and the like are more convenient.

As a further improvement of the invention, the motor further comprises a rotor core, wherein a rotor slot for filling the rotor winding is formed in the rotor core, a through slot is formed in the rotor slot in the direction close to the center of the circle, and a fastener is detachably arranged on the through slot.

Among this technical scheme, the groove of wearing on the rotor groove mainly is the wire winding notch, and then after the winding finishes, increases the fastener, realizes whole lock.

Specifically, the epoxy resin laminated board is used as a fastener, so that winding slipping can be effectively prevented, and meanwhile, the influence of electromagnetic induction and the like is avoided. So that the winding is effectively fixed in the through groove through the fastener after being effectively wound.

As a further improvement of the invention, from the installation perspective, the through groove comprises a necking structure and an expanding structure, the necking structure is arranged close to the circle center and forms a guide port of the winding, and the expanding structure forms a containing cavity of the winding.

Among this technical scheme, because the winding itself is thinner, so choose for use the throat structure as the guide mouth, get into the coil guide to wider holding the intracavity, and the hole enlargement structure is as holding the chamber, can hold more windings, realizes holistic holding and arrangement, gets into from narrower mouth promptly, and more wire casing is held to wider intracavity, and is more reasonable. A guide opening is arranged at a position close to the circle center, and the coil enters from the direction of the circle center and is fixed in an expanding structure far away from the circle center.

As a further improvement of the present invention, the stator slots are of a slender structure, the rotor slots are of a squat structure, and the opening directions of the stator slots and the rotor slots are arranged opposite to each other.

Among this technical scheme, the rotor groove chooses for use short fat column structure, leans on outer setting, and structure fat relatively for what whole rotor groove encloses the fender than many, can protect inside stator slot well. The stator slot is of a slender structure, so that winding from inside to outside can be realized in the stator slot, the connection area of the stator assembly and the rotor assembly is ensured, more windings are wound, magnetic flux can be utilized to the maximum degree, and the working efficiency of the motor is improved; in addition, the design of the stator slots in the scheme also improves the number of winding turns of the stator winding, and the coil capacity in a single stator slot is large.

As a further improvement of the invention, the windings in the rotor slots are wound by coils from outside to inside, and the windings of the stator slots are wound by coils from inside to outside.

In the technical scheme, the stator slot is long and thin in cooperation with the whole structure, so that a winding mode from inside to outside is selected, and the rotor slot is wide and has more internal space, so that an winding mode from inside to outside is selected.

As a further improvement of the present invention, the present invention further includes a hub for rotating the motor shaft, the hub includes at least a first hub near the outer side and a second hub near the inner side, the first hub is integrally formed with a protection structure at least near the outer side, and the protection structure respectively protects the motor and the motor shaft.

Among this technical scheme, because first wheel hub is close to the outside, the event sets up a plurality of protection architecture alone, extension wheel hub's life, and the protection architecture of integrative setting can protect motor and motor shaft simultaneously, specifically, the protection architecture of protection motor centers on the protection architecture outside of protection motor shaft, forms dual protection.

As a further improvement of the present invention, the motor further comprises a mounting portion integrally provided on an outer side of the first hub, the mounting portion being used for mounting the motor shaft, and an inductor generating an induced rotational force with the winding being mounted in the mounting portion.

In this technical scheme, increase the inductor, under the operating condition stator module and rotor subassembly produce assorted response revolving force, response revolving force drive wheel hub rotates. And the cooperation corresponds the inductor, to whole rotation, plays the effect of supplementary promotion, and the effect of formation is better.

As a further improvement of the invention, the motor control circuit controls the motor by matching corresponding instructions through a plurality of sampling units and prestored parameters and instructions corresponding to the sampling units in the motor control circuit when the parameters acquired by the sampling units are abnormal.

In this technical scheme, set up a plurality of parameters of prestoring, then utilize with the contrast of the parameter of prestoring to and the instruction setting of corresponding result, can promote the control of whole motor, cooperate a plurality of parameters, whole precision, it is more accurate. Meanwhile, the existing normal value is used as a pre-stored parameter, and when the normal value is lower than or higher than the pre-stored parameter, corresponding operation is set, so that the whole smooth control is ensured.

As a further improvement of the present invention, the pre-stored parameters at least include current, stator rotation speed and motor torque parameters.

In this technical scheme, the parameter of prestoring is provided with electric current, stator rotational speed and motor torsion, has ensured whole promotion, specifically, the increase of motor torsion for whole control is more accurate.

As a further improvement of the invention, the sampling unit is used for sampling the motor torque parameters and is a prestressed sheet integrally fixed on the motor shaft so as to realize corresponding sampling.

In the technical scheme, the special torsion measuring strain gauge is adhered to the elastic shaft to be measured by using strain glue to form a strain bridge, and the strain bridge returns voltage to react torque change after a working power supply (12V) is provided for the strain bridge. Compared with other assembling modes, the mode is simpler and easier to realize.

Drawings

FIG. 1 is a schematic structural diagram of an electric vehicle according to the present invention;

fig. 2 is a perspective view of a motor provided by the present invention.

FIG. 3 is a schematic circuit diagram of a motor control circuit provided by the present invention;

FIG. 4 is a schematic circuit diagram of a driving circuit according to the present invention;

FIG. 5 is a schematic structural view of a hub provided by the present invention;

FIG. 6 is a schematic structural view of a first hub provided in accordance with the present invention;

FIG. 7 is a circuit schematic of a control system provided by the present invention;

FIG. 8 is a schematic diagram of the operation of the control system provided by the present invention;

fig. 9 is a schematic view of the operation of the conventional motor provided by the present invention;

fig. 10 is a schematic view of the operation of the motor of the present invention provided by the present invention;

in the figure:

100. a vehicle body; 200. a wheel; 300. a motor; 310. a stator core; 320. a stator slot; 330. A motor control circuit; 340. a drive circuit; 350. a rotor core; 360. a rotor slot; 361. penetrating a groove; 362. a fastener; 400. a hub; 410. a first hub; 411. a protective structure; 412. an assembling portion; 420. a second hub; 10. a power source; 20. a drive circuit; 30. a control circuit; 40. a first sampling unit; 50. a second sampling unit; 60. and a third sampling unit.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that functional, methodological, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

Example 1:

as shown in fig. 1 to 10, an electric vehicle includes a vehicle body 100, a wheel 200 mounted on the vehicle body 100, and a motor 300 for driving the wheel 200 to move, wherein the motor 300 is detachably disposed on the vehicle body 100 through a mounting cavity of the vehicle body 100. In actual use, the motor 300 is generally installed below a seat of the vehicle body 100.

Specifically, the motor 300 realizes the motion of the stator and the rotor by winding, firstly, a stator core 310 of the motor 300 is provided with a stator slot 320 for assembling a wound coil, and meanwhile, the wound coil is wound on the stator slot 320, and the slot width of the stator slot 320 is 2-4 times of the slot width of the existing stator slot;

referring to fig. 3, the vehicle further includes a motor control circuit 330 and a driving circuit 340, the driving circuit 340 drives the motor by rotating the controllable coil around the fixed coil, and the motor control circuit 330 controls the driving circuit by collecting samples of the motor during operation and the torque of the motor, so as to control the driving circuit to control the vehicle wheel during operation.

In this embodiment, the motor that utilizes the coiling winding to form can carry out corresponding adjustment through the quantity of coil etc. in the winding, and then is convenient for realize effects such as intelligent regulation motor speed for the control of whole electric motor car is more intelligent.

In the embodiment, when the rotor and the stator both adopt a coil winding mode, the limitation of an application scene is limited, generally, the slot width of a rotor slot in the rotor assembly is small, usually 1cm, and the number of coils in the mode is small, so that the torque of a motor in work is insufficient, and a place with high-speed requirement cannot be applied; at the moment, in order to realize the optimization problem, the slot width of the rotor slot can be selected to be increased, while the existing stator slot has narrower slot width and less winding number, so that the slot width of the stator slot is 2-4 times of the slot width of the existing stator slot; if the slot width of the stator slot is too large, the coil of the stator winding is too much, which easily causes an infinite amount of magnetic flux and influences normal use.

In this embodiment, specifically, for drive circuit and motor, a coil rotation and a coil static mode can be adopted, when being used for the motor body, the coil on the rotor rotates, the coil of the stator is static, and then the whole control is realized through a coil static and a coil dynamic mode, and when carrying out relevant control, the drive is driven by the coil rotation, so that the rotor of the motor rotates around the stator, and the final drive is realized.

In this embodiment, the relevant parameter of the motor of gathering is more, and then during control, the precision is higher, and is more convenient to the accuse of whole process to and whole utilization etc..

Example 2

In this embodiment, the structure of the motor is mainly described.

Referring to fig. 2, the motor 300 further includes a rotor core 350, a rotor slot 360 filled with a rotor winding is formed in the rotor core 350, a through slot 361 is formed in the rotor slot 360 in a direction close to the center of the circle, and a fastener 362 is detachably disposed on the through slot 361.

In this embodiment, the groove of wearing on the rotor groove is mainly the wire winding notch, and then after the winding finishes, increases the fastener, realizes whole lock.

Specifically, the epoxy resin laminated board is used as a fastener, so that winding slipping can be effectively prevented, and meanwhile, the influence of electromagnetic induction and the like is avoided. So that the winding is effectively fixed in the through groove through the fastener after being effectively wound.

Referring to fig. 2, from the installation perspective, the through groove 361 includes a necking structure and an expanding structure, the necking structure is disposed near the center of a circle and forms a guiding opening of the winding, and the expanding structure forms a containing cavity of the winding.

In the embodiment, the winding is thinner, so that the necking structure is selected as the guide port to guide the coil into the wider accommodating cavity, and the expanding structure is used as the accommodating cavity to accommodate more windings, so that the whole accommodating and arranging are realized, namely, the winding enters from the narrower port, and more wire grooves are accommodated in the wider cavity, so that the winding is more reasonable. A guide opening is arranged at a position close to the circle center, and the coil enters from the direction of the circle center and is fixed in an expanding structure far away from the circle center.

Referring to fig. 2, the stator slot 320 has an elongated structure, the rotor slot 360 has a short and fat structure, and the opening direction of the stator slot 320 is opposite to the opening direction of the rotor slot 360.

In this embodiment, the rotor groove chooses for use fat column structure, leans on outer setting, fat structure for what whole rotor groove encloses the fender than many, can protect inside stator slot well. The stator slot is of a slender structure, so that winding from inside to outside can be realized in the stator slot, the connection area of the stator assembly and the rotor assembly is ensured, more windings are wound, magnetic flux can be utilized to the maximum degree, and the working efficiency of the motor is improved; in addition, the design of the stator slots in the scheme also improves the number of winding turns of the stator winding, and the coil capacity in a single stator slot is large.

Specifically, the windings in the rotor slots 360 are wound from outside to inside and the windings of the stator slots 320 are wound from inside to outside.

In this embodiment, the stator slot is long and thin in cooperation with the whole structure, so that the winding mode from inside to outside is selected, and the rotor slot is wide and has more internal space, so that the winding mode from inside to outside is selected.

In this embodiment, in order to secure the magnetic flux of the rotor during assembly, the distance from the center of the rotor core to the outer surface of the rotor core is set to L1, the slot width of the rotor slot is L2, and the ratio of L2: L1 is (0.15-0.25): 1; the groove width not only solves the problem that fewer coils are wound in the prior art, but also meets the requirement of motor torsion. Preferably, the rotor slots have a slot width of 2cm, i.e. a doubling compared to the usual slot width. An increase in the slot width within a suitable range corresponds to an increase in the coils of the stator winding.

In the coil winding, the rotor winding refers to a winding wound on the rotor core, the winding is composed of a plurality of coils or coil groups, the coils adopt thick wires, and the thin wires form 20-50 turns of coils in a single rotor slot. The thick wire is adopted specifically, and the thin wire in a single rotor groove is correspondingly matched to form a coil with 20-50 turns, so that the working efficiency of the motor is effectively improved, the working efficiency of a normal motor is only 80%, and the working efficiency of the motor can be improved to 90% by adopting the scheme.

The thick wire is a copper wire with a thickness of 1mm or more. In the working process of the coil, a skin effect (skin effect) is generated by a thin copper wire, and when alternating current passes through a conductor, the current distribution on the cross section of the conductor is uneven due to the induction action, so that the current density is larger on the surface of the conductor at the position close to the conductor. This phenomenon is called "skin effect". The skin effect increases the effective channel resistance of the conductor. The higher the frequency, the more pronounced the skin effect. When a current of a high frequency passes through the wire, it is considered that the current flows only in a thin layer on the surface of the wire, which is equivalent to the reduction of the cross section of the wire and the increase of the resistance.

Because the scheme needs to consider that the direct current signal is used for carrying out relevant control, the copper wire with the thickness of more than 1mm is selected, and the thick wire can reduce and weaken the skin effect.

In the scheme, one scheme is as follows: a stator assembly is external, the rotor assembly being located inside the stator assembly. The second scheme is as follows: the rotor assembly is arranged outside, and the stator assembly is positioned inside the rotor assembly.

The magnets of the stator core and the rotor core are permanent magnets, and the magnets are square, tile-shaped or arc-shaped. In the scheme, the outer diameter of the stator core is 219 mm; the inner diameter of the rotor core is 240 mm.

Example 3

In the present embodiment, the structure of the hub is mainly described.

Referring to fig. 5-7, the hub 400 for rotating the motor shaft is further included, the hub 400 includes at least a first hub 410 near the outer side and a second hub 420 near the inner side, the first hub 410 is integrally formed with a protection structure 411 at least near the outer side, and the protection structure 411 respectively protects the motor and the motor shaft.

In this embodiment, because first wheel hub is close to the outside, so set up a plurality of protection architecture alone, extension wheel hub's life, and the protection architecture of integrative setting can protect motor and motor shaft simultaneously, specifically, the protection architecture of protection motor centers on the protection architecture outside of protection motor shaft, forms dual protection.

Further, the first hub forms an inner concave surface on one side, a first reinforcing plate is formed on the inner concave surface side, a second reinforcing plate is formed on the outer side of the first hub body, and a third reinforcing plate is arranged around the second reinforcing plate; the first reinforcing plate and the second reinforcing plate are oppositely arranged.

In the embodiment, the high-speed motor is adopted, and in order to match the working efficiency of the motor, the working efficiency is kept above 90% in a normal working state, the rotating speed of the motor can be automatically adjusted, and the requirements on the strength of a motor shaft and the strength of a hub body are high; specifically, since the first hub and the second hub (not shown) are symmetrically arranged, the present solution is described in detail with the first hub 410, and the structure thereof is improved, and three reinforcing plates are arranged on the whole first hub body, and the three reinforcing plates are integrally formed on the first hub body, and can be generally formed by die casting.

The two reinforcing plates are arranged outside the first hub, because the first hub is directly outward, firstly the third reinforcing plate is used for protecting the external impact on the hub body, and then the second reinforcing plate further protects the motor shaft at the joint due to the direct connection with the motor shaft.

In order to accomplish the assembling, a fitting part 412 integrally provided at an outer side of the first hub 410 is further included, the fitting part 412 is used for assembling the motor shaft, and an inductor generating an induced rotational force with the winding is fitted in the fitting part 412.

In this embodiment, increase the inductor, under the operating condition stator module and rotor subassembly produce assorted response revolving force, response revolving force drive wheel hub rotates. And the cooperation corresponds the inductor, to whole rotation, plays the effect of supplementary promotion, and the effect of formation is better.

Specifically, the inductor may be a metal body such as iron.

When the motor shaft is arranged, at least one step is arranged on the through hole through which the motor shaft passes through the first hub. The through-hole is not single perforating hole in this scheme, sets up the step in perforating hole department, except the increase intensity, also can improve the assembly efficiency of motor shaft.

The first step structure located on the outer side of the first hub body is in interference fit with the motor shaft, and the second step structure located on the inner concave surface is used for assembling a bearing.

Specifically, the step structure is divided into two types, one type is in interference fit with the motor shaft, and the other type is used for assembling a bearing, wherein balls are arranged in the bearing and are arranged around the circumference of the motor shaft.

A bearing is arranged between the motor shaft and the hub, and in a working state, the stator assembly and the rotor assembly generate matched induction rotating force which drives the hub to rotate. By combining the step structure, the step structure completely covers the bearing, and the service life of the product is prolonged.

The outer edge of the rotor core is fixedly connected with the inner edge of the hub body by adopting colloid or pins. The cost is low firstly by adopting colloid bonding, and the industrial production can be realized on a large scale; the glue fills the entire mounting surface.

Example 4

In this embodiment, control is mainly described.

Specifically, including motor control circuit and drive circuit, motor control circuit is through a plurality of sampling units to and the corresponding parameter and the instruction of prestoring of sampling unit in the motor control circuit, when the parameter that the sampling unit gathered is unusual, the matching corresponds the instruction, carries out the control of motor.

Further, the corresponding motor control is performed by the overall control system, which, as shown in fig. 7, includes a power supply 10,

the driving circuit 20, the driving circuit 20 includes a controllable coil and a coil, the driving circuit 20 adopts a controllable coil driving circuit, and the controllable coil is matched with the coil in a rotating way to provide a magnetic field to drive the driving circuit;

a control circuit 30, wherein the control circuit 30 is connected to the power supply 10 and the drive circuit 20;

the first sampling unit 40, the first sampling unit 40 includes a rotor sampling unit and a stator sampling unit, the driving circuit 20 is connected with the control circuit through the rotor sampling unit after the stator sampling;

the second sampling unit 50 is used for measuring the rotating speed of the motor rotor;

a third sampling unit 60, configured to measure a torque of the motor, where the third sampling unit is a strain gauge attached to the measured elastic shaft to form collected data;

the data acquisition device further comprises a storage unit which is connected with the control circuit and used for storing the abnormal data range and the normal data range of the first sampling unit, the second sampling unit and the third sampling unit, and when each sampling unit transmits data to the control circuit, the control circuit carries out corresponding adjustment control according to the data type to which the sampling unit belongs.

In this embodiment, set up a plurality of parameters of prestoring, then utilize with the contrast of the parameter of prestoring to and the instruction setting of corresponding result, can promote the control of whole motor, cooperate a plurality of parameters, whole precision, it is more accurate. Meanwhile, the existing normal value is used as a pre-stored parameter, and when the normal value is lower than or higher than the pre-stored parameter, corresponding operation is set, so that the whole smooth control is ensured.

In this embodiment, the pre-stored parameters at least include current, stator rotation speed, and motor torque parameters.

In this embodiment, the parameter of prestoring is provided with electric current, stator rotational speed and motor torsion, has ensured whole promotion, specifically, the increase of motor torsion for whole control is more accurate.

Specifically, what be used for motor torque parameter sampling among the sampling unit is prestressing force piece, prestressing force piece is integrative to be fixed in on the motor shaft to realize corresponding sampling.

In the embodiment, a special torsion measuring strain gauge is adhered to the elastic shaft to be measured by using strain glue to form a strain bridge, and after a working power supply (12V) is provided for the strain bridge, the strain bridge returns voltage to reflect the change of torque. Compared with other assembling modes, the mode is simpler and easier to realize.

And the double operational amplifier circuit is used for amplifying the return voltage and the reaction torque data and sending the amplified data to the control circuit.

In this embodiment, the voltage value returned by the torque sensor is small (microvolt level), amplified by the dual operational amplifier, and input to the single chip, and converted into a digital signal by the single chip ADC.

Further, the control unit is a control chip, and the model of the control chip is STM32F103C8T 6.

In this embodiment, the rotor portion driver main control chip is STM32F103C8T6, is responsible for controlling the drive voltage of rotor and gathering current, voltage, rotational speed, torque signal to calculate the output efficiency who adjusts entire system with this.

In the control system, the key technical points are as follows:

1. a current sampling unit for sampling a bus current of the motor dc power supply;

the current sampling is divided into rotor part current sampling and stator part current sampling, and the stator current sampling is obtained from a current signal port corresponding to a stator controller (a motor three-phase controller). A Kelvin connection method is adopted for a sampling resistor of rotor current sampling so as to improve sampling precision and reduce influence on a load. The acquired current analog signal is amplified through a high-precision operational amplifier and then converted into a digital signal through a single chip microcomputer ADC.

2. A torque sampling section. A special torsion measuring strain gauge is adhered to the elastic shaft to be measured by using strain glue to form a strain bridge, and after a working power supply (12V) is provided for the strain bridge, the strain bridge returns voltage to reflect the change of torque. The voltage value returned by the torque sensor is small (microvolt level), amplified by the double operational amplifiers, input into the singlechip, and converted into a digital signal by the singlechip ADC.

3. A control unit. The main control chip of the rotor part driver is STM32F103C8T6 and is responsible for controlling the driving voltage of the rotor and collecting current, voltage, rotating speed and torque signals, and the output efficiency of the whole system is adjusted through calculation.

Output efficiency ═ rotational speed ═ torque/(output voltage · output current)

4. The whole system requires that the output efficiency is more than or equal to 83 percent and less than or equal to 90 percent under the stable state.

Specifically, the output efficiency means: the effective output power output by the motor is proportional to the total output power.

Referring to fig. 8, the control process of the present invention specifically includes: firstly, in an initial state, then a starting signal is started, a power supply supplies power, a controllable coil and a coil work, so that the driving voltage of a rotor is increased, a signal is accelerated, the driving current of a stator and the rotor is increased until the target rotating speed is reached, and in the process of accelerating the signal, if the output efficiency is less than 83% of the whole output efficiency, a control circuit controls the controllable coil to work, the rotor current is increased, and the system is stable; if the output efficiency accounts for 83% -90% of the whole output efficiency, no operation is needed, the system is stable, and if the output efficiency is greater than 90% of the whole output efficiency, the rotor current needs to be reduced to realize the stability of the system.

Further, the increase or decrease of the rotor current is realized by adjusting the controllable coils.

The motor intelligent control concrete process in the invention, the whole intelligent control needs to be controlled from two aspects:

on one hand, the rotor current is controlled by speed feedback, and the control is basic control. When the voltage of an electric switch is opened and the voltage of the electric switch is more than 1V, the chopper circuit of the switching power supply starts to work, the initial current of a rotor is 1A, when the voltage of the electric switch is more than 1.3V, the current of the rotor directly rises to 3.5A, then the current of the rotor linearly decreases along with the increase of the rotating speed of the motor according to the increase of the rotating speed until the rotating speed rises to 1000 revolutions per minute, the current of the rotor drops to 2A, and each rotating speed of the motor has a corresponding current value of the rotor. And if the voltage of the electric gate is less than 1V when the electric gate is closed, the chopper circuit of the switching power supply is closed, and the current of the rotor is 0.

Another aspect is based on speed feedback control plus efficiency control. When the voltage of an electric gate is more than 1.3V, the speed feedback control starts to work in the initial state, the efficiency control also starts to work after 0.1 second, the efficiency control tends to be static when the efficiency of a motor stator is more than 83 percent, and the rotor current is linearly increased when the efficiency of the motor stator is less than 83 percent and is controlled within 0.1-0.5 second until the efficiency of the motor stator is improved to 88 percent; when the efficiency of the motor stator is more than 88%, the efficiency control starts to linearly reduce the rotor current, and when the operation efficiency of the motor stator reaches 90%, the efficiency control stops.

In this embodiment, the connection relationship of the whole control system is as follows:

firstly, selecting a proper POWER interface through a POWER supply, then realizing POWER supply connection through POWER in a control circuit after the POWER supply is connected, at the moment, connecting a pin 29 to a driving circuit through PWM, adjusting the driving circuit in the driving circuit through boosting and the like, further enabling a controllable coil and a coil to act to generate POWER, driving a rotor of a motor to rotate around a stator, sequentially connecting a current acquisition unit of the stator and the rotor through each acquisition unit, specifically, a pin 7 of a chip in the driving circuit, processing the acquisition units, and feeding the processed acquisition units back to the control circuit through a pin 18 in the control circuit; for a Hall sensor circuit for measuring the rotating speed of the motor, feedback is carried out through a speed through a pin 41 in a control circuit; for torque measurement, the third sampling unit is introduced via VIR in pin 11 of the control circuit, and fed back to the control circuit via DN PWR via pin 21.

Referring to fig. 9-10, there are shown graphs comparing the operating efficiency of a conventional motor with that of the present invention under the same operating conditions.

It can be seen from the figure that the existing motor can only keep 90% of the work efficiency within a small range, and the motor adopting the scheme can keep 90% of the work efficiency within a large range (time), and can also match the torque (torsion) under the state under the work efficiency, so that the user experience is better, and the efficiency is higher.

The rotating speed of the motor body is 1000-; by adopting the improved rotor assembly, the working efficiency can be kept more than 90% for a long time in a larger rotating speed range, the defect that the speed and other parameters of the motor cannot be intelligently adjusted is fundamentally overcome, the currents of the rotor assembly and the stator assembly are matched according to the signals correspondingly acquired by the rotating speed, and finally the working efficiency is kept more than 90%.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.