阅读说明：本技术 一种带有旋转变压器的电机结构及其旋转变压器调试方法 (Motor structure with rotary transformer and rotary transformer debugging method thereof ) 是由 杨德才 薛力铭 乔春雨 于 2019-11-07 设计创作，主要内容包括：本发明提供一种带有旋转变压器的电机结构及其旋转变压器的调试方法，解决了现有的电机结构不易进行旋转变压器的调零操作且旋转变压器调试方法不佳的问题。本发明的电机结构包括壳体组件、转子组件、端盖、后盖、旋转变压器、2个半圆形卡圈、外锯齿锁紧垫圈和防脱螺母。本发明另外提供该旋转变压器的调试方法。本发明的电机结构能提高旋转变压器与电机本体的同轴度，避免了电机在运行过程中旋转变压器发生定转子干涉的状况，本发明的旋转变压器的调试方法简单可靠，满足用旋转变压器控制换相电机的使用需求。(The invention provides a motor structure with a rotary transformer and a debugging method of the rotary transformer, and solves the problems that the existing motor structure is not easy to perform zero setting operation of the rotary transformer and the debugging method of the rotary transformer is not good. The motor structure comprises a shell assembly, a rotor assembly, an end cover, a rear cover, a rotary transformer, 2 semicircular clamping rings, an external sawtooth locking washer and an anti-falling nut. The invention further provides a debugging method of the rotary transformer. The motor structure can improve the coaxiality of the rotary transformer and the motor body, and avoids the condition that the rotary transformer generates stator and rotor interference in the operation process of the motor.)

1. A motor structure with a rotary transformer is characterized by comprising a shell assembly, a rotor assembly, an end cover, a rear cover, a rotary transformer, 2 semicircular clamping rings, an outer sawtooth locking washer and an anti-falling nut, wherein the shell assembly comprises a shell and a stator assembly, the stator assembly is arranged in a cavity in the shell, the shell and the stator assembly are positioned through a stator key, and the end cover is arranged at the tail end of the shell;

the rotor assembly is axially arranged in the shell assembly and comprises a rotor core, a shaft, magnetic steel, a rotor sheath and a dynamic balance ring, the rotor core is pressed on the shaft in an interference manner to prevent the shaft and the rotor core from rotating, the magnetic steel is bonded on the rotor core, the rotor sheath is coated with glue and sleeved on the magnetic steel to prevent the magnetic steel from centrifugally falling off when the motor rotor rotates at a high speed, and the dynamic balance ring is pressed on the shaft and tightly attached to two sides of the rotor core to calibrate dynamic balance;

the left end of the shaft body is provided with a first bearing, the right end of the shaft body is sequentially provided with a first step and a second step, the first step and the second step are respectively provided with a second bearing and a rotary transformer, the first bearing and the second bearing are respectively arranged in the shell and the end cover, the rotary transformer comprises a rotary transformer stator and a rotary transformer rotor, the rotary transformer stator is arranged in the end cover, 2 semicircular clamping rings are arranged in an annular positioning groove in the periphery of the rotary transformer stator, and the 2 semicircular clamping rings are all fixed on the end cover through locking screws, so that the rotary transformer and the end cover are installed;

in addition, the tail end of the shaft is sequentially sleeved with an external sawtooth locking washer and an anti-falling nut, the rotary transformer rotor and the shaft are fixedly locked, the rotary transformer is prevented from moving back and forth on the shaft, finally, the tail end of the end cover is provided with a rear cover, the tail end of the shaft penetrates out of a central hole of the rear cover, and a V-shaped sealing ring is arranged at the central hole and used for sealing and preventing impurities from entering.

2. The structure of an electric motor with a resolver according to claim 1, wherein the end cover and the housing, and the back cover and the end cover are fitted through the seam allowance.

3. The electric machine structure with a resolver according to claim 1, wherein the housing is provided with a first bearing chamber for accommodating the first bearing.

4. The structure of an electric motor with a resolver according to claim 1, wherein the end cover comprises an end cover body, a first annular boss is provided at a center of the end cover body in an axial direction, a ring of radial annular protrusions are provided on an inner circumferential surface of the first annular boss, and a second bearing chamber for accommodating the second bearing and a stator installation groove for accommodating the resolver stator are formed on both sides of the annular protrusions, respectively.

5. The structure of an electric motor with a resolver according to claim 1, wherein an inner diameter of the second bearing chamber is smaller than an inner diameter of the stator mounting groove.

6. The structure of claim 1, wherein the annular positioning groove of the stator of the resolver is flanked by a second annular boss and a third annular boss, the second annular boss is axially disposed in the stator mounting groove, and the second annular boss has an axial length D₁Axial length D of stator mounting groove₂The length is 0.5 mm.

7. The dynamoelectric machine structure of claim 1, wherein said resolver stator, resolver rotor, stator assembly, and rotor assembly are all coaxially disposed therebetween.

8. The resolver commissioning method of an electric machine structure with a resolver according to claim 1, 2, 3, 4, 5, 6 or 7, comprising the following steps:

(1) 2 semicircular clamping rings for the rotary transformer are arranged in a motor end cover, a locking screw does not need to be screwed down, and a stator of the rotary transformer can rotate freely; at the moment, the motor is not provided with the rear end cover, the outer sawtooth locking washer, the anti-falling nut and the V-shaped sealing ring, and other components are assembled;

(2) connecting an excitation end of the rotary transformer with a signal generator;

(3) connecting any two phases of the sine end or the cosine end of the rotary transformer and the motor with two channels of the oscilloscope respectively;

(4) rotating the motor rotor assembly by external force to enable the motor and the rotary transformer to run at a constant speed, wherein at the moment, two sinusoidal curves are generated on the oscilloscope and are respectively a motor signal and a rotary transformer signal, and whether zero points of the two sinusoidal curves are superposed or not is observed;

(5) keeping the motor rotor rotating, and manually rotating the rotary transformer stator so as to adjust the position of the rotary transformer stator until the zero points of the two sinusoidal curves in the oscilloscope coincide, wherein the zero points of the motor and the rotary transformer coincide;

(6) and screwing down the screws on the 2 semicircular clamping rings to determine the position of the stator of the rotary transformer, so that the debugging of the rotary transformer is completed.

Technical Field

The invention belongs to the technical field of motors, and particularly provides a motor structure with a rotary transformer and a rotary transformer debugging method thereof.

Background

At present, in the design of motor, more and more motor products adopt resolver control motor product's commutation and signal output, and current motor is owing to use traditional resolver mounting structure to difficult assurance is coaxial, makes the motor scratch phenomenon appear easily in the operation in-process. In addition, because the rotary transformer is different from the hall commutation control, zero point debugging is needed before assembly in the control of the rotary transformer, but the zero point debugging operation of the rotary transformer is not easy to be carried out in the existing motor structure.

The existing rotary transformer is mainly debugged in two modes, one mode is electrical debugging, the other mode is debugging through a debugging tool, the two debugging methods are poor in universality, the electrical debugging needs to gradually adjust the offset angle by changing an internal program of the rotary transformer, the debugging through the debugging tool is feasible only for one motor structure and the rotary transformer structure, the replacement of the motor and the rotary transformer structure is not applicable, and the tool needs to be manufactured again.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a motor structure with a resolver and a resolver debugging method thereof. The motor has high coaxiality, and avoids the condition that the rotary transformer generates stator and rotor interference in the running process of the motor. The debugging method of the rotary transformer can effectively align the zero points of the rotary transformer and the motor winding, and the method is simple to operate and reliable in performance.

In order to achieve the purpose, the invention adopts the following technical scheme: a motor structure with a rotary transformer comprises a shell assembly, a rotor assembly, an end cover, a rear cover, the rotary transformer, 2 semicircular clamping rings, an external sawtooth locking washer and an anti-falling nut, wherein the shell assembly comprises a shell and a stator assembly;

the rotor assembly is axially arranged in the shell assembly and comprises a rotor core, a shaft, magnetic steel, a rotor sheath and a dynamic balance ring, the rotor core is pressed on the shaft in an interference manner to prevent the shaft and the rotor core from rotating, the magnetic steel is bonded on the rotor core, the rotor sheath is coated with glue and sleeved on the magnetic steel to prevent the magnetic steel from centrifugally falling off when the motor rotor rotates at a high speed, and the dynamic balance ring is pressed on the shaft and tightly attached to two sides of the rotor core to calibrate dynamic balance;

the left end of the shaft body is provided with a first bearing, the right end of the shaft body is sequentially provided with a first step and a second step, the first step and the second step are respectively provided with a second bearing and a rotary transformer, the first bearing and the second bearing are respectively arranged in the shell and the end cover, the rotary transformer comprises a rotary transformer stator and a rotary transformer rotor, the rotary transformer stator is arranged in the end cover, 2 semicircular clamping rings are arranged in an annular positioning groove in the periphery of the rotary transformer stator, and the 2 semicircular clamping rings are all fixed on the end cover through locking screws, so that the rotary transformer and the end cover are installed;

in addition, the tail end of the shaft is sequentially sleeved with an external sawtooth locking washer and an anti-falling nut, the rotary transformer rotor and the shaft are fixedly locked, the rotary transformer is prevented from moving back and forth on the shaft, finally, the tail end of the end cover is provided with a rear cover, the tail end of the shaft penetrates out of a central hole of the rear cover, and a V-shaped sealing ring is arranged at the central hole and used for sealing and preventing impurities from entering.

Furthermore, the end cover and the shell, and the rear cover and the end cover are installed in a matched mode through the seam allowances.

Furthermore, a first bearing chamber for accommodating the first bearing is arranged on the shell.

Furthermore, the end cover comprises an end cover body, a first annular boss is arranged at the center of the end cover body in the axial direction, a circle of radial annular bulge is arranged on the inner circumferential surface of the first annular boss, and a second bearing chamber for accommodating a second bearing and a stator installation groove for accommodating a stator of the rotary transformer are formed on two sides of the annular bulge respectively.

Further, the inner diameter of the second bearing chamber is smaller than the inner diameter of the stator mounting groove.

Further, the rotationThe two sides of the annular positioning groove of the stator of the transformer are respectively provided with a second annular boss and a third annular boss, the second annular boss is axially arranged in the stator mounting groove, and the axial length D of the second annular boss is₁Axial length D of stator mounting groove₂The length is 0.5 mm.

Furthermore, the rotary transformer stator, the rotary transformer rotor, the stator assembly and the rotor assembly are coaxially arranged.

The invention also provides a method for debugging the rotary transformer of the motor structure, which specifically comprises the following steps:

(1) 2 semicircular clamping rings for the rotary transformer are arranged in a motor end cover, a locking screw does not need to be screwed down, and a stator of the rotary transformer can rotate freely; at the moment, the motor is not provided with the rear end cover, the outer sawtooth locking washer, the anti-falling nut and the V-shaped sealing ring, and other components are assembled;

(2) connecting an excitation end of the rotary transformer with a signal generator;

(3) connecting any two phases of the sine end or the cosine end of the rotary transformer and the motor with two channels of the oscilloscope respectively;

(4) rotating the motor rotor assembly by external force to enable the motor and the rotary transformer to run at a constant speed, wherein at the moment, two sinusoidal curves are generated on the oscilloscope and are respectively a motor signal and a rotary transformer signal, and whether zero points of the two sinusoidal curves are superposed or not is observed;

(5) keeping the motor rotor rotating, and manually rotating the rotary transformer stator so as to adjust the position of the rotary transformer stator until the zero points of the two sinusoidal curves in the oscilloscope coincide, wherein the zero points of the motor and the rotary transformer coincide;

(6) and screwing down the screws on the 2 semicircular clamping rings to determine the position of the stator of the rotary transformer, so that the debugging of the rotary transformer is completed.

Compared with the prior art, the invention has the following beneficial effects: the motor structure can improve the coaxiality of the rotary transformer and the motor body, avoids the condition that the rotary transformer generates stator and rotor interference in the operation process of the motor, the stator of the rotary transformer is fixed with the end cover through 2 semicircular clamping rings, the rotor of the rotary transformer is locked with the shaft through the outer sawtooth locking washer and the anti-drop nut, the rotor of the rotary transformer is prevented from moving left and right in the rotation process, the semicircular clamping rings are fixed with the end cover through the locking screws, the installation and the disassembly are convenient, the signal debugging of the rotary transformer and the motor body are convenient, and the installation structure is easy to install and disassemble the rotary transformer, so when the motor product fails, the maintenance is convenient. The debugging method of the rotary transformer is simple and reliable, and meets the use requirement of controlling the phase change motor by using the rotary transformer.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of an installation structure of the resolver;

FIG. 3 is a schematic structural diagram of a rotary transformer;

FIG. 4 is a schematic view of a semi-circular collar;

FIG. 5 is a schematic structural view of the anti-slip nut;

fig. 6 is a schematic structural diagram of a motor end cover.

FIG. 7 is a schematic diagram of zero alignment of the resolver to the sine and cosine curves of the motor windings;

fig. 8 is a schematic diagram of misalignment of zero points of sine and cosine curves of the resolver and the motor winding.

In the figure: 1-a rotary transformer; 1-1-a resolver stator; 1-1-1-annular positioning groove; 1-1-2-a second annular boss; 1-1-3-a third annular boss; 1-2-a resolver rotor; 2-end cap; 2-1-an end cap body; 2-2-a first annular boss; 2-3-annular protrusion; 2-4-second bearing chamber; 2-5-stator mounting groove; 3-rear cover; 4-semicircular clamping rings; 4-1-via; 5-locking the screw; 6-external sawtooth locking washer; 7-anti-drop nut; 8-a second bearing; 9-a housing assembly; 9-1-shell; 9-1-1-a first bearing chamber; 9-2-stator assembly; 10-a rotor assembly; 10-1-rotor core; 10-2-axis; 10-2-1-a first step; 10-2-2-second step; 10-3-magnetic steel; 10-4-rotor sheath; 10-5-dynamic balance ring; 11-a first bearing; 12-V type sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, a motor structure with a rotary transformer comprises a housing assembly 9, a rotor assembly 10, an end cover 2, a rear cover 3, a rotary transformer 1, 2 semicircular collars 4, an external sawtooth locking washer 6 and an anti-drop nut 7, wherein the housing assembly 9 comprises a housing 9-1 and a stator assembly 9-2, the stator assembly 9-2 is installed in an internal cavity of the housing 9-1, the housing 9-1 and the stator assembly 9-2 are positioned through a stator key, and the end cover 2 is installed at the tail end of the housing 9-1;

the rotor assembly 10 is axially arranged inside the shell assembly 9, the rotor assembly 10 comprises a rotor core 10-1, a shaft 10-2, magnetic steel 10-3, a rotor sheath 10-4 and a dynamic balance ring 10-5, the rotor core 10-1 is pressed on the shaft 10-2 in an interference manner to prevent the shaft 10-2 and the rotor core 10-1 from rotating, the magnetic steel 10-3 is bonded on the rotor core 10-1, the rotor sheath 10-4 is coated with glue and sleeved on the magnetic steel 10-3 to prevent the magnetic steel 10-3 from centrifugally falling off when the motor rotor rotates at a high speed, and the dynamic balance ring 10-5 is pressed on the shaft 10-2 and tightly attached to two sides of the rotor core 10-1 to calibrate dynamic balance;

a first bearing 11 is arranged at the left end of the shaft body, a first step 10-2-1 and a second step 10-2-2 are sequentially arranged at the right end of the shaft body, a second bearing 8 and a resolver 1 are respectively installed at the first step and the second step, and a first bearing 11 and a second bearing are respectively placed in the housing 9-1 and the end cap 2, referring to fig. 3, the rotary transformer 1 comprises a rotary transformer stator 1-1 and a rotary transformer rotor 1-2, the rotary transformer stator 1-1 is arranged in an end cover 2, 2 semicircular clamping rings 4 (the structures of the semicircular clamping rings refer to fig. 4) are arranged in the annular positioning groove 1-1-1 on the periphery of the rotary transformer stator 1-1, and the 2 semicircular clamping rings 4 are all fixed on the end cover 2 through locking screws, so that the installation of the rotary transformer 1 and the end cover 2 is realized;

the rotary transformer rotor 1-2 is sleeved on the periphery of the second step of the shaft 10-2 and is arranged in the rotary transformer stator 1-1, in addition, an outer sawtooth locking washer 6 and an anti-falling nut 7 (the structure of the anti-falling nut refers to fig. 5) are sequentially sleeved at the tail end of the shaft 10-2, the rotary transformer rotor and the shaft 10-2 are fixedly locked, the rotary transformer 1 is prevented from moving back and forth on the shaft 10-2, finally, the rear cover 3 is installed at the tail end of the end cover 2, the tail end of the shaft 10-2 penetrates out of a central hole of the rear cover 3, and a V-shaped sealing ring 12 is installed at the central hole and used for sealing and preventing impurities from entering.

The end cover 2 and the shell 9-1, and the rear cover 3 and the end cover 2 are installed in a matched mode through rabbets.

The housing 9-1 is provided with a first bearing chamber 9-1-1 for accommodating a first bearing 11.

Referring to fig. 6, the end cap 2 includes an end cap body 2-1, a first annular boss 2-2 axially disposed is disposed at a center of the end cap body 2-1, a ring of radial annular protrusions 2-3 is disposed on an inner circumferential surface of the first annular boss 2-2, and a second bearing chamber 2-4 for accommodating a second bearing 8 and a stator mounting groove 2-5 for accommodating a resolver stator 1-1 are respectively formed at two sides of the annular protrusions 2-3.

The inner diameter of the second bearing chamber 2-4 is smaller than the inner diameter of the stator mounting groove 2-5.

A second annular boss 1-1-2 and a third annular boss 1-1-3 are respectively arranged at two sides of an annular positioning groove 1-1-1 of the rotary transformer stator 1-1, the second annular boss 1-1-2 is axially arranged in a stator mounting groove 2-5, and the axial length D of the second annular boss 1-1-2₁Axial length D of stator mounting groove 2-5₂The length is 0.5 mm.

The rotary transformer stator 1-1, the rotary transformer rotor 1-2, the stator assembly 9-2 and the rotor assembly 10 are coaxially arranged.

Machined annular pockets 2-6 are provided in the second bearing chamber 2-4 and the stator mounting groove 2-5, respectively.

The motor structure can improve the coaxiality of the rotary transformer and the motor body, avoids the condition that the rotary transformer generates stator and rotor interference in the operation process of the motor, the stator 1-1 of the rotary transformer is fixed with the end cover 2 through 2 semicircular clamping rings 4, the rotor 1-2 of the rotary transformer is locked with the shaft 10-2 through the outer sawtooth locking washer 6 and the anti-falling nut 7, avoids the left and right movement of the rotor of the rotary transformer in the rotation process, the semicircular clamping rings 4 are fixed with the end cover 2 through the locking screws 5, the installation and the disassembly are convenient, the signal debugging of the rotary transformer and the motor body is convenient, and the installation structure is easy to install and disassemble the rotary transformer, so when the motor product fails, the maintenance is convenient.

The invention also provides a method for debugging the rotary transformer of the motor structure, which specifically comprises the following steps:

(1) 2 semicircular clamping rings for the rotary transformer are arranged in a motor end cover, a locking screw does not need to be screwed down, and a stator of the rotary transformer can rotate freely; at the moment, the motor is not provided with the rear end cover, the outer sawtooth locking washer, the anti-falling nut and the V-shaped sealing ring, and other components are assembled;

(2) connecting an excitation end of the rotary transformer with a signal generator;

(3) connecting any two phases of the sine end or the cosine end of the rotary transformer and the motor with two channels of the oscilloscope respectively;

(4) rotating the motor rotor assembly by external force to enable the motor and the rotary transformer to run at a constant speed, wherein at the moment, two sinusoidal curves are generated on the oscilloscope and are respectively a motor signal and a rotary transformer signal, and whether zero points of the two sinusoidal curves coincide or not is observed (when the zero points do not coincide, the observation is shown in figure 8);

(5) keeping the motor rotor rotating, and manually rotating the rotary transformer stator, so as to adjust the position of the rotary transformer stator until the zero points of the two sinusoidal curves in the oscilloscope coincide, and at the moment, the zero points of the motor and the rotary transformer coincide (the zero point coincidence refers to fig. 7);

(6) and screwing down the screws on the 2 semicircular clamping rings to determine the position of the stator of the rotary transformer, so that the debugging of the rotary transformer is completed.

The debugging method of the rotary transformer can effectively align the zero points of the rotary transformer and the motor winding, and is simple to operate and reliable in performance.

The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.