CN108988595A - A kind of solid rotor alternating current generator - Google Patents

Abstract

The invention discloses a kind of solid rotor alternating current generators, it is desirable to provide a kind of solid rotor alternating current generator that manufacturing cost is low.It includes stator module, rotor assembly, support base and bearing；The stator module is two sets and is symmetrical arranged that the stator module includes base, the stator core being fixedly installed on base, the stator winding on stator core；The rotor assembly includes shaft, the rotor disk being fixedly installed in the middle part of shaft；The base of two stator modules is symmetrically arranged on support base；Stator core on two bases is opposite；It is installed on two bases at the both ends of the shaft by bearing, and rotor disk is between two stator cores.The present invention has the advantages that easily manufactured, low cost, easy for installation.

Description

A solid rotor AC motor

technical field

The invention relates to the technical field of motors, in particular to a solid rotor AC motor.

Background technique

Traditional AC motors use a radial working magnetic field, the direction of the working magnetic field is perpendicular to the axis of the rotating shaft, and the working surface of the stator core is cylindrical. The inner circle of the stator core of the traditional AC motor is provided with slots, and the stator winding is embedded in the slots. In the case of an asynchronous machine, the rotor core is a laminated cylinder, and copper wires or cast aluminum are embedded in the slots to form windings. Magnetic, the role of the winding is to conduct electricity; the cylindrical surface of the synchronous motor is equipped with winding poles or permanent magnet poles. The axial length of the traditional AC motor is long, and it needs to have a rotating shaft, bearings, end covers, etc. to form a complete body. In order to reduce loss, traditional motors are laminated iron cores with magnetic conduction, low-resistivity copper or aluminum windings with conductive conduction, complex structure and high manufacturing cost. The current traditional motor structure has a long axial dimension, a large amount of materials, and a relatively heavy weight. It requires a large installation space, and it is inconvenient to install and maintain. There are big problems in some specific applications.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art, and to provide a solid rotor AC motor that is easy to manufacture, low in manufacturing cost and easy to install.

In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

A solid rotor AC motor, including a stator assembly, a rotor assembly, a support seat and a bearing; the stator assemblies are two sets and symmetrically arranged, the stator assembly includes a machine base, a stator core fixed on the machine base, embedded Stator windings installed on the stator core; the rotor assembly includes a rotating shaft, fixedly installed on the rotor disk in the middle of the rotating shaft; the bases of the two stator assemblies are symmetrically installed on the support base; the stator cores on the two bases are opposite to each other; The two ends of the rotating shaft are installed on the two bases through bearings, and the rotor disk is located between the two stator cores.

Preferably, the rotor disk is a homogeneous magnetically conductive steel plate with a certain thickness.

Preferably, the rotor disc is provided with radial radial grooves or multi-circle annular grooves, and cast aluminum or copper bars are embedded in the radial radial grooves or multi-circle annular grooves to form a grid winding.

Preferably, the rotor disk is provided with radial radial grooves or grooves in an annular array, and permanent magnetic steel bars are embedded in the radial radial grooves or multi-circle annular grooves.

Preferably, the stator core is made of thin silicon steel plates stacked into an annular disc, and the stator core is provided with teeth and slots for magnetic conduction and coil embedding.

Preferably, the shaft is made of steel rod.

Compared with prior art, the present invention has following advantage:

Compared with the traditional motor, the invention has the advantages of high efficiency, high strength, convenient manufacture, low cost, convenient installation and the like. It can also realize many special functions that cannot be realized by traditional motors, and it will have unique advantages in specific application occasions, and because the invention has a wide range of applications, the production cost is lower than that of traditional squirrel-cage asynchronous motors, and the popularization and application of the invention It will occupy a certain share in the super-large traditional squirrel-cage asynchronous motor market worth billions of yuan per year. The solid rotor permanent magnet motor has the characteristics of high efficiency, convenient starting, etc., and some special applications also have good market prospects. The present invention The application will produce huge economic benefits.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a structural schematic diagram of one embodiment of the present invention.

Fig. 2 is a schematic structural diagram of another embodiment of the present invention.

Fig. 3 is a schematic diagram of the first structure of the rotor disk used in the present invention.

Fig. 4 is a schematic diagram of the second structure of the rotor disk used in the present invention.

Fig. 5 is a schematic diagram of the third structure of the rotor disk used in the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. In the following description, in order to clearly show the structure and working method of the present invention, the accompanying drawings will be used as the basis to describe with the help of many directional words, but "front", "rear", "left", "right", Words such as "up" and "down" are to be understood as convenient terms, and should not be understood as restrictive terms.

Example 1

A solid rotor AC motor, as shown in Figure 1, includes a stator assembly, a rotor assembly, a support base 3 and a bearing 4; the stator assembly is two sets and symmetrically arranged, and the stator assembly includes a machine base 11, which is fixedly installed on The stator core 12 on the frame 11 is embedded in the stator winding 13 on the stator core 12; the rotor assembly includes a rotating shaft 21, which is fixedly installed on the rotor disk 22 in the middle of the rotating shaft 21; the frames 11 of the two stator assemblies are symmetrical Installed on the support base 3; the stator cores 12 on the two machine bases 11 are opposite; the two ends of the rotating shaft 21 are installed on the two machine bases 11 through bearings 4, and the rotor disk 22 is located between the two stator cores 12 between.

Specifically, the stator core 12 is made of thin silicon steel plates stacked into a circular disk-shaped body, and the stator core is provided with teeth (not shown in the figure) and slots (not shown in the figure) to realize magnetic conduction and embedded coils. not shown).

Specifically, the rotor disk 22 is a homogeneous magnetically conductive steel plate with a certain thickness, as shown in FIG. 3 .

Specifically, the rotating shaft 21 is preferably made of a steel rod, obviously, it can also be made of other suitable materials.

Example 2

A solid rotor AC motor, including a stator assembly, a rotor assembly, a support base 3 and a bearing 4; the stator assemblies are two sets and arranged symmetrically, the stator assembly includes a machine base 11, and the stator fixed on the machine base 11 The iron core 12, the stator winding 13 embedded in the stator iron core 12; the rotor assembly includes a rotating shaft 21, which is fixedly installed on the rotor disk 22 in the middle of the rotating shaft 21; the bases 11 of the two stator assemblies are symmetrically installed on the supporting base 3 The stator cores 12 on the two machine bases 11 face each other;

Specifically, the stator core 12 is made of thin silicon steel plates stacked into a circular disk-shaped body, and the stator core is provided with teeth (not shown in the figure) and slots (not shown in the figure) to realize magnetic conduction and embedded coils. not shown).

Specifically, the rotor disc 22 is made of a solid high magnetic permeability steel plate, and the rotor disc 22 is provided with radial radial grooves, and annular grooves are arranged at both ends of the radial radial grooves, and the radial radial grooves are embedded with There is cast aluminum 31. Obviously, cast aluminum can also be replaced by copper bars, which can improve the efficiency of the motor, as shown in Figure 4.

Specifically, the rotating shaft 21 is preferably made of a steel rod, obviously, it can also be made of other suitable materials.

Example 3

A solid rotor AC motor, including a stator assembly, a rotor assembly, a support base 3 and a bearing 4; the stator assemblies are two sets and arranged symmetrically, the stator assembly includes a machine base 11, and the stator fixed on the machine base 11 The iron core 12, the stator winding 13 embedded in the stator iron core 12; the rotor assembly includes a rotating shaft 21, which is fixedly installed on the rotor disk 22 in the middle of the rotating shaft 21; the bases 11 of the two stator assemblies are symmetrically installed on the supporting base 3 The stator cores 12 on the two machine bases 11 face each other;

Specifically, the stator core 12 is made of thin silicon steel plates stacked into a circular disk-shaped body, and the stator core is provided with teeth (not shown in the figure) and slots (not shown in the figure) to realize magnetic conduction and embedded coils. not shown).

Specifically, the rotor disk 22 is made of a solid high magnetic permeability steel plate,

The rotor disk 22 is provided with an annular array of grooves (not shown in the figure), and permanent magnet steel strips 32 are embedded in the multi-circle annular grooves to improve the efficiency and operation performance of the motor, as shown in FIG. 5 .

Specifically, the rotating shaft 21 is preferably made of a steel rod, obviously, it can also be made of other suitable materials.

Example 4

An axial magnetic field solid rotor AC motor, as shown in Figure 2, the motor stator and rotor disk in the above-mentioned embodiments are a unit motor, and multiple unit motors are connected in series, and a large-capacity motor can be formed by adding auxiliary systems such as bearings. The structure of the new motor is the same as that of the above-mentioned embodiments, and the structure of the end stator is also the same as that of the above-mentioned embodiments, but the structure of the middle part of the stator needs to be changed. There are tooth slots on both sides and the outer circle of the disc-shaped iron core embedded with coils The surface is fixed on the frame, and the magnetic field also axially passes through the iron core.

The working process (principle) is as follows:

The connection of the stator winding ensures that the stator core on the opposite side forms a magnetic field with opposite polarity after electrification, and the rotor disk is also made of high magnetic permeability steel, which forms a magnetic field passing through the rotor disk. When three-phase alternating current is passed through the stator winding, this passes The magnetic field of the rotor disk will rotate. When the rotor speed is different from the rotating magnetic field speed, a current will be induced in the rotor disk. After the interaction of the current and the magnetic field to generate electromagnetic force, the torque can be output on the shaft to convert the electromagnetic energy into mechanical energy.

Traditional motor winding conducts electricity, iron core conducts magnetism, and the current in the iron core passing through the alternating magnetic field will cause loss. The magnetic field of the present invention directly passes through the rotor disk without turning, and the induced current is all active current, basically no non-active current. Therefore, the principle innovation of the present invention is that the solid rotor disk is both a magnetic conductor and a work current conductor. The rotor disk does not need laminations and windings, and the structure can be greatly simplified. The resistivity of steel is about 5.6 times that of copper and 3.5 times that of aluminum, but under the condition of a solid disc rotor, the conductive area is much larger than that of a separate winding. When the rotor disc has an appropriate thickness, the increase in the conductive area can completely compensate for the difference in resistivity. It is a smooth disc with low wind resistance loss, and the distance between bearings is also greatly shortened. The mechanical loss is smaller than that of traditional motors, so the motor efficiency will be improved. When the cost permits and the motor needs to have higher efficiency, the radial grooves are processed on the disk, and the inner and outer parallel end ring grooves are processed and then filled with copper or aluminum to form a grid-shaped winding, which can reduce the thickness of the rotor disk and Improve motor efficiency.

After adding permanent magnet steel and magnetizing, the motor becomes a permanent magnet synchronous motor. At this time, the motor is excited by the magnetic steel, the rotor has no current, and the rotor part has no resistance loss. The power factor of the motor can reach 1.0, so the stator current is also much smaller. The size of the motor And the weight is reduced, and the efficiency will be greatly improved. The motor starts asynchronously. When the speed is close to the synchronous speed, the permanent magnetic field will pull the motor into synchronization. When there is a load disturbance exceeding the maximum synchronous torque, the motor loses step and the motor enters asynchronous operation. When the load disturbance does not exceed the maximum asynchronous electromagnetic torque, the motor is asynchronous. Running, and returning to synchronous operation after the disturbance is over, the motor has high reliability.

The present invention is a motor completely different in structure from traditional motors, and can be applied in the fields of asynchronous motors and permanent magnet synchronous motors. The first novelty of the present invention is that the working magnetic field changes from radial to axial; the second is also The most important point is that the rotor adopts a homogeneous solid plate without laminations. In the structure of the present invention, the solid plate can be used as both the magnetic conduction of the iron core and the conduction of the winding, which can simplify the structure and reduce costs; the third solid plate is embedded with permanent magnetic steel. Finally, it can take into account the high-efficiency operation of the permanent magnet motor and the convenience of starting the asynchronous motor. AC motor without permanent magnet steel solid rotor can replace squirrel cage asynchronous motor; steel solid rotor with permanent magnet has the characteristics of high efficiency of permanent magnet synchronous motor under no load and within a certain power range, and can start like a squirrel cage asynchronous motor at the same time, compared with traditional It is more convenient and economical to apply a synchronous motor requiring a complex starting device; the serial motor can be applied to the field of the original long iron core high-capacity high-speed motor, and the present invention will bring about great changes in the structure and weight of the motor.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (6)

1. a kind of solid rotor alternating current generator, including stator module, rotor assembly, support base (3) and bearing (4)；Its feature Be: the stator module is two sets and is symmetrical arranged that the stator module includes base (11), is fixedly installed in base (11) On stator core (12), the stator winding (13) on stator core (12)；The rotor assembly includes shaft (21), The rotor disk (22) being fixedly installed in the middle part of shaft (21)；The base (11) of two stator modules is symmetrically arranged on support base (3)； Stator core (12) on two bases (11) is opposite；Two bases are installed on by bearing (4) at the both ends of the shaft (21) (11) on, and rotor disk (22) is between two stator cores (12).

2. solid rotor alternating current generator according to claim 1, it is characterised in that: the rotor disk (22) is with certain thickness The homogeneous magnetic conductive steel plate of degree.

3. solid rotor alternating current generator according to claim 1 or claim 2, it is characterised in that: be provided on the rotor disk (22) Cast aluminium or copper bar are embedded in radial radial slot or multi-ring annular slot, radial radial slot or multi-ring annular slot, to form one A grid winding.

4. solid rotor alternating current generator according to claim 1 or claim 2, it is characterised in that: be provided on the rotor disk (22) On be provided with the groove of radial radial slot or annular array, be embedded with permanent-magnet steel in radial radial slot or multi-ring annular slot Item.

5. solid rotor alternating current generator according to claim 1 or claim 2, it is characterised in that: the stator core (12) is by thin silicon Steel plate builds up an annulus discoid body, and the stator core is equipped with the tooth and slot for realizing magnetic conduction and embedded coil.

6. solid rotor alternating current generator according to claim 1 or claim 2, it is characterised in that: the shaft (21) is made of rod iron.