CN111555475B

CN111555475B - Bearing integrated rotating-transformation pressing stator and rotor structure

Info

Publication number: CN111555475B
Application number: CN202010456060.XA
Authority: CN
Inventors: 陈德志; 苏卓勋; 李绪镇; 王阳
Original assignee: Shenyang University of Technology
Current assignee: Shenyang University of Technology
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-05-14
Anticipated expiration: 2040-05-26
Also published as: CN111555475A

Abstract

The invention relates to a bearing integrated rotary transformation pressing stator and rotor structure which comprises a rotary transformer stator and a rotary transformer rotor, wherein the rotary transformer rotor is positioned at the inner side of the rotary transformer stator, the rotary transformer rotor is provided with a rotating shaft hole, the inner periphery of the rotary transformer stator is provided with a rotary transformer stator side winding, the outer periphery of the rotary transformer rotor is provided with a rotary transformer rotor side winding, rolling pieces are uniformly distributed between the rotary transformer stator and the rotary transformer rotor, the positions of the rolling pieces and the rotary transformer stator are relatively unchanged, the rolling pieces can roll and rotate in situ when the rotary transformer rotor rotates, and the number of pole pairs of the rotary transformer stator side winding plus the number of pole pairs of the rotary transformer rotor side winding = the number of the rolling pieces. The rolling parts are made of magnetic conductive materials, the magnetic conductivity of the rolling parts is far greater than that of air, most of magnetic fields are coupled through the rolling parts, so that the waveform is more sinusoidal, and the rolling parts are in an integral contact structure, and have reliable structure, long service life and high working efficiency.

Description

Bearing integrated rotating-transformation pressing stator and rotor structure

Technical Field

The invention relates to a stator and rotor structure, in particular to a bearing integrated type rotating-transformation stator and rotor structure.

Background

The development and utilization of energy are power sources for economic development and social productivity, electric energy is widely applied as secondary energy after the second industrial revolution, and in the current society, automobiles become necessities in daily life of human beings, so people have to carry out technical revolution of energy conservation and emission reduction on the automobiles, and new energy automobiles are produced in the revolution. Under the current big background of global energy shortage, environmental deterioration and climate abnormity, the new energy automobile can meet the requirement of human on vehicle mobility on one hand; on the other hand, compared with the traditional power system automobile, the new energy automobile has the economic, environmental-friendly and sustainable development values.

In a new energy automobile, a driving motor is the heart of the automobile, and the driving motor needs to work in various modes, such as starting an engine, driving the motor, generating electricity by the motor, feeding back braking energy and the like, and the working modes are randomly determined according to the running working conditions of the automobile; the running conditions of the vehicle are also extremely complex, and the vehicle is usually started, accelerated, braked, stopped, ascended and descended, turned and changed lanes and the like. Therefore, the drive motor has no doubt high technical requirements.

The existence of the electric brush and the slip ring in the vehicle-mounted motor brings great hidden trouble to the safe operation of the new energy automobile, so the brushless design of the vehicle-mounted motor is very necessary. At present, additional devices or additional windings are more or less added in motor brushless schemes at home and abroad, so that the electromagnetic relation is complicated, the power density of the motor is reduced, and the like. Potential safety hazards caused by electric brushes and slip rings in the vehicle-mounted motor can be avoided through a brushless excitation technology, namely, a rotary transformer is used for supplying power to a motor excitation winding.

Disclosure of Invention

Object of the Invention

In order to solve the problems that an additional device or an additional winding is added in the existing motor excitation brushless scheme, the electromagnetic relation is complicated, the power density of the motor is reduced and the like, the invention provides a bearing integrated type spinning-transformation pressing stator-rotor structure, which realizes electric energy transfer, and thus, the motor excitation winding is excited.

Technical scheme

The utility model provides a bearing integral type revolves changes and presses stator rotor structure, includes resolver stator and resolver rotor, and the resolver rotor is located the resolver stator inboard, and the resolver rotor is equipped with the pivot hole, and the interior week of resolver stator is equipped with resolver stator side winding, and the periphery of resolver rotor is equipped with resolver rotor side winding, the equipartition is equipped with the rolling member between resolver stator and the resolver rotor, and the rolling member is unchangeable relatively with the position of resolver stator, and the rolling member can be rotatory at the normal position roll when the resolver rotor is rotatory, resolver stator side winding number of poles + resolver rotor side winding number of poles = the quantity of rolling member.

The rolling piece is spherical or cylindrical.

The rolling members have a diameter or height greater than the thickness of the resolver stator and resolver rotor.

The rolling members are of magnetically conductive material.

The magnetic conductive material is stainless steel, copper or SMC composite material.

The magnetically permeable material is preferably an SMC composite material.

The rotary transformer stator is formed by bonding a plurality of stator split punching sheets.

The periphery cover of resolver rotor has a rotor cover, and the periphery of rotor cover is equipped with the slide.

And a slot is arranged between the rotary transformer rotor and the rotor sleeve, and a slot wedge is inserted into the slot.

Advantages and effects

The invention provides a novel integrated spinning-transformation pressing stator-rotor structure of a bearing, which is used for replacing the structure of a traditional rotary transformer. The rolling parts between the stator and the rotor of the transformer play a role in magnetic conductance modulation, the rolling parts are made of magnetic conducting materials, the magnetic conductivity of the rolling parts is far greater than that of air, most of a magnetic field generated by a stator and rotor winding is coupled through the rolling parts, so that the waveform of the magnetic field is more sinusoidal, meanwhile, the rolling parts also enable the structure of the rotary transformer to be an integrated structure, and the rotary transformer is reliable in structure, long in service life and high in working efficiency.

Drawings

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

FIG. 2 is a schematic view of the individual structure of the stator and the balls;

FIG. 3 is a schematic diagram of a stator lamination in a split state;

FIG. 4 is a schematic view of the rotor in isolation;

FIG. 5 is a schematic view of an isolated structure of a rotor bushing;

FIG. 6 is a sectional view taken at H-H of FIG. 5, scheme 1;

FIG. 7 is a sectional view taken at H-H of FIG. 5, scheme 2;

FIG. 8 is a schematic view of the structure at the slot wedge;

fig. 9 is a waveform diagram of a rotor-side current.

Description of reference numerals: 1. the rotor comprises a rotary transformer stator side winding, 2 rotary transformer stators, 3 rolling parts, 4 rotary transformer rotor side windings, 5 rotating shaft holes, 6 rotary transformer rotors, 7 bonding materials, 8 stator split punching sheets a, 9 stator split punching sheets b, 10 rotor sleeves and 11 slot wedges.

Detailed Description

The technical solutions of the present invention will be described in further detail with reference to the accompanying drawings and specific implementations, and all the portions of the present invention that are not described in detail are the prior art.

As shown in fig. 1, 2, 3, 4, 5, 6, 7 and 8, a bearing integrated rotary transformer stator/rotor structure includes a rotary transformer stator 2 and a rotary transformer rotor 6, the rotary transformer rotor 6 is located inside the rotary transformer stator 2, the rotary transformer rotor 6 is provided with a rotating shaft hole 5, the inner periphery of the rotary transformer stator 2 is provided with a rotary transformer stator side winding 1, the outer periphery of the rotary transformer rotor 6 is provided with a rotary transformer rotor side winding 4, and the rotary transformer stator side winding 1 and the rotary transformer rotor side winding 4 are both off-line in a winding manner. The uniform distribution is equipped with rolling member 3 between resolver stator 2 and the resolver rotor 6, the position of rolling member 3 and resolver stator 2 is unchangeable relatively, resolver stator 2 is equipped with the pit, rolling member 3 is located the pit, rolling member 3 can be rotatory at the rotatory normal position roll of resolver rotor 6, in this embodiment, the periphery cover of resolver rotor 6 has a rotor cover 10, the periphery of rotor cover 10 is equipped with the slide, it has the slot to open between resolver rotor 6 and the rotor cover 10, the slot interpolation has slot wedge 11, rotor cover 10, resolver rotor 6 and slot wedge 11 are the same material. The rolling parts 3 are spherical or cylindrical, the diameter or height of the rolling parts 3 is larger than the thicknesses of the rotary transformer stator 2 and the rotary transformer rotor 6, so that magnetic lines of force can be shielded better, the rolling parts 3 are made of magnetic conductive materials, can be made of stainless steel, copper or SMC composite materials and the like, and the SMC composite materials are preferably used. The number of pairs of 1 pole of the stator side winding of the resolver + 4 pole pairs of the rotor side winding of the resolver = the number of rolling members 3. In this embodiment, the number of slots of the resolver stator 2 and the resolver rotor 6 is 12, the resolver stator 2 is two-phase 4-antipole, the resolver rotor 6 is two-phase 2-antipole, and the number of rolling elements 3 for rotation and magnetic conductance modulation is 6. The rotary transformer stator 2 is formed by laminating silicon steel sheets, the rotary transformer stator 2 is formed by bonding a plurality of stator split punching sheets, as shown in fig. 3, the stator split punching sheet a 8 and the stator split punching sheet b 9 are manufactured by processing the silicon steel sheets through a high-speed punch and a punching sheet die, the stator split punching sheet a 8 and the stator split punching sheet b 9 are bonded through a bonding material 7, and the periphery is preferably welded together and is firmer. The adhesive material may be a highly thermally conductive, highly insulating material, such as a resin.

When this stator-rotor structure is applied to the transformer, the resolver stator 2 is connected with the motor housing, and both sides are equipped with the end cover, and the resolver rotor 6 is connected with the motor rotor pivot. Two-phase 4 antipodal current is conducted to a stator side winding 1 of the rotary transformer to form a rotary magnetic field, the rotary magnetic field is coupled out of a 2 antipodal magnetic field through the magnetic conductance modulation action of the rolling pieces 3, so that the two-phase 2 antipodal current is induced around 4 groups on the rotor side of the rotary transformer, the rotary transformer works normally, and the excitation winding is supplied with power through the rectifier.

As shown in fig. 9, the wave curves of

numerals

1, 2 and 3 represent the wave curves of the a-phase, the B-phase and the C-phase, respectively. When the current waveform rotary transformer is just started, the current is unstable due to the internal inductance of the transformer, the waveform of a rotor of the transformer tends to be sinusoidal along with the change of time, and the current waveform generated by the rotor of the transformer due to the induced potential is more sinusoidal, has smaller harmonic and has higher efficiency than that of a common rotary transformer.

It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications belonging to the technical scheme of the present invention are within the scope of the present invention.

Claims

1. The utility model provides a bearing integral type is revolved and is converted pressure stator rotor structure, includes resolver stator (2) and resolver rotor (6), and resolver rotor (6) are located resolver stator (2) inboard, and resolver rotor (6) are equipped with pivot hole (5), and the interior week of resolver stator (2) is equipped with resolver stator side winding (1), and the periphery of resolver rotor (6) is equipped with resolver rotor side winding (4), its characterized in that: rolling pieces (3) playing a role in magnetic conductance modulation are uniformly distributed between the rotary transformer stator (2) and the rotary transformer rotor (6), the positions of the rolling pieces (3) and the rotary transformer stator (2) are relatively unchanged, the rolling pieces (3) can roll and rotate in situ when the rotary transformer rotor (6) rotates, and the number of pole pairs of the side winding (1) of the rotary transformer stator and the number of pole pairs of the side winding (4) of the rotary transformer rotor = the number of the rolling pieces (3);

the rolling member (3) is made of magnetic conductive material;

2. The bearing-integrated rotary-transformed stator-rotor structure according to claim 1, wherein: the rolling piece (3) is spherical or cylindrical.

3. The bearing-integrated resolver stator rotor structure according to claim 2, wherein: the diameter or height of the rolling elements (3) is greater than the thickness of the resolver stator (2) and the resolver rotor (6).

4. The bearing-integrated rotary-transformed stator-rotor structure according to claim 1, wherein: the magnetic conductive material is an SMC composite material.

5. The bearing-integrated rotary-transformed stator-rotor structure according to claim 1, wherein: the rotary transformer stator (2) is formed by bonding a plurality of stator split punching sheets.

6. The bearing-integrated rotary-transformed stator-rotor structure according to claim 1, wherein: the periphery of the rotary transformer rotor (6) is sleeved with a rotor sleeve (10), and the periphery of the rotor sleeve (10) is provided with a slide way.

7. The bearing-integrated rotary-transformed stator-rotor structure according to claim 1, wherein: and an inserting groove is formed between the rotary transformer rotor (6) and the rotor sleeve (10), and a groove wedge (11) is inserted into the inserting groove.