CN217590521U

CN217590521U - Permanent magnet synchronous motor integrated with variable frequency driver

Info

Publication number: CN217590521U
Application number: CN202221080311.XU
Authority: CN
Inventors: 甘晓峰; 吴昌明; 任立鹏
Original assignee: Ningbo Yiteng Precision Manufacturing Co ltd
Current assignee: Ningbo Yiteng Precision Manufacturing Co ltd
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-10-14
Anticipated expiration: 2032-05-07

Abstract

The utility model relates to a permanent magnet synchronous motor of integrated variable frequency driver, which comprises a motor body, wherein the motor body comprises a first shell, a stator, a rotor and a main shaft, a first cavity is arranged in the first shell, and the stator, the rotor and the main shaft are all arranged in the first cavity; the technical problems that in the prior art, electromagnetic wave interference is caused between a variable frequency driver and a permanent magnet synchronous motor due to a connecting cable, the heating value of a control cabinet is large, and fan noise disturbs residents are solved.

Description

Permanent magnet synchronous motor integrated with variable frequency driver

Technical Field

The utility model relates to a PMSM technical field specifically says and indicates an integrated variable frequency drive's PMSM.

Background

The existing elevator generally adopts a frequency conversion, voltage transformation and speed regulation (VVVF) mode to control the speed and displacement of a motor, and the motor converts electric energy into mechanical energy to drive a car or a manned platform of the elevator to move. Due to technology and industry differences, motors and variable frequency drives are typically designed and manufactured by different manufacturers, with the two being separate components. Generally, the elevator main motor is located in the hoistway or in the machine room, the variable frequency drive is mounted in the control cabinet, and the two are connected by a cable and work cooperatively. The structure with the separated variable frequency driver and the motor can cause the following defects:

1. the power cable from the variable frequency driver to the motor is a strong electromagnetic interference emission source, can radiate electromagnetic waves to pollute the space and interfere peripheral weak point equipment, and an encoder required on the motor is a precise photoelectric or electromagnetic element, is very easy to interfere to cause equipment abnormity, and needs to be carefully treated by adopting various interference-resistant measures;

2. when the variable frequency driver works, the variable frequency driver is a large heating source, an independent radiator and a fan are needed, the variable frequency driver is arranged in the control cabinet, the size of the control cabinet is increased, particularly the thickness is difficult to reduce, the heating greatly limits the arrangement mode of the control cabinet, and the heat dissipation condition of the control cabinet must be considered in the arrangement of the control cabinet; the noise of the fan can also be disturbing to the user experience.

SUMMERY OF THE UTILITY MODEL

To the deficiency of the prior art, the utility model aims to provide an integrated variable frequency drive's PMSM.

In order to solve the technical problem, the utility model provides an integrated frequency conversion driver's PMSM, including motor body, motor body includes first shell, stator, rotor and main shaft, is equipped with first cavity in the first shell, and in first cavity was all located to stator, rotor and main shaft, wherein, be equipped with the second shell on the first shell periphery wall, be equipped with the second cavity in the second shell, be equipped with frequency conversion driver in the second cavity, frequency conversion driver is connected with motor body electricity.

After the structure is adopted, the utility model relates to an integrated variable frequency drive's PMSM has following advantage: the variable frequency driver is integrated on the permanent magnet synchronous motor, and all the problems of a connecting cable between the variable frequency driver and the permanent magnet synchronous motor, including the problems of difficult arrangement, interference of electromagnetic waves emitted by a power line, interference resistance of an encoder and the like, do not exist; the control cabinet used in cooperation with the utility model has the advantages of small heat generation, greatly reduced volume and more free and various installation and arrangement modes because of no variable frequency driver; will the utility model discloses can make the electromagnetic compatibility performance of elevator product improve by a wide margin in the elevator product of using, need not to consider the on-the-spot special demand of arranging in addition and cause the problem that electromagnetic emission exceeds standard, install second shell and variable frequency drive ware on the periphery wall of first shell moreover, can make the installation the utility model discloses the time is nimble more convenient, and the second shell can be according to actual conditions, moves towards suitable direction, and does not occupy too much space.

As an improvement, the second shell comprises a bottom plate and a cover plate, the cover plate and the bottom plate are enclosed to form a second cavity, and the bottom plate is arranged on the peripheral wall of the first shell; by adopting the structure, the variable frequency driver and the first shell are separated through the bottom plate, and the mutual influence between the variable frequency driver and the motor body is avoided.

As an improvement, a convex block is integrally formed on the peripheral wall of the first shell, the bottom plate is detachably arranged on the convex block, and a contact surface between the bottom plate and the convex block is a plane; with this arrangement, the flat surface enables the variable frequency drive to be mounted more stably within the first enclosure.

As an improvement, the utility model also comprises a connecting wire, a plurality of first connecting terminals are arranged on the second shell, one end of the connecting wire is connected with the first connecting terminals, and the other end is connected with the motor body; by adopting the structure, the structure has the advantage of simple structure.

As an improvement, the utility model also comprises a connecting wire, the second shell and the first shell are integrally formed, the first cavity is communicated with the second cavity, one end of the connecting wire is connected with the variable frequency driver, the other end of the connecting wire is connected with the motor body, and the connecting wire is positioned in the first cavity and the second cavity; adopt this kind of structure, integrated into one piece's first shell and second shell make the utility model discloses overall structure is compacter, and the structure is simpler.

As an improvement, the stator is fixedly arranged on the inner side wall of the first shell, and the rotor is rotatably arranged on the main shaft; by adopting the structure, the structure has the advantage of simple structure.

As an improvement, a plurality of grooves are arranged on the second shell; by adopting the structure, the contact area between the second shell and the outside can be increased by the groove, and the heat dissipation efficiency is improved.

As an improvement, a plurality of second connecting terminals are arranged on the second shell; by adopting the structure, the second wiring terminal is used for being connected with equipment such as a power supply and the like.

As an improvement, a brake is also arranged on the first shell; with this structure, the brake is used to stop the operation of the rotor.

Drawings

Fig. 1 is an exploded view of an overall structure of a first embodiment of the present invention.

Fig. 2 is a schematic overall perspective view of a first embodiment of the present invention.

Fig. 3 is a cross-sectional view of a second housing according to a first embodiment of the present invention.

Fig. 4 is an exploded view of the overall structure of the second embodiment of the present invention.

Fig. 5 is a schematic structural diagram of a first housing and a second housing according to a second embodiment of the present invention.

Reference numerals are as follows: 1. a first housing; 100. a first cavity; 2. a stator; 3. a rotor; 4. a main shaft; 5. a second housing; 500. a second cavity; 501. a base plate; 502. a cover plate; 6. a variable frequency drive; 7. a bump; 8. a first connection terminal; 9. a groove; 10. a second connection terminal; 11. and a brake.

Detailed Description

The following describes the permanent magnet synchronous motor integrated with a variable frequency driver in detail with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in fig. 1 to 3, the present embodiment provides a permanent magnet synchronous motor integrated with a variable frequency driver, including a motor body, where the motor body includes a first casing 1, a stator 2, a rotor 3, and a spindle 4, a first cavity 100 is provided in the first casing 1, the stator 2, the rotor 3, and the spindle 4 are all disposed in the first cavity 100, where the stator 2 is fixedly mounted on an inner side wall of the first casing 1, and the rotor 3 is rotatably disposed on the spindle 4; a brake 11 for braking the rotor 3 is also arranged on one end surface of the outer side of the first shell 1; be equipped with second shell 5 on the 1 periphery wall of first shell, be equipped with second cavity 500 in the second shell 5, be equipped with frequency conversion driver 6 in the second cavity 500, frequency conversion driver 6 is connected with the motor body electricity.

The variable frequency driver 6 is integrated on the permanent magnet synchronous motor, and all the problems of a connecting cable between the variable frequency driver 6 and the permanent magnet synchronous motor, including difficult arrangement, interference of electromagnetic waves emitted by a power line, interference resistance of an encoder and the like are solved; the control cabinet used in cooperation with the utility model has the advantages of small heat generation, greatly reduced volume and more free and various installation and arrangement modes because the variable frequency driver 6 is not arranged; will the utility model discloses can make the electromagnetic compatibility performance of elevator product improve by a wide margin in the elevator product of using, need not to consider the problem that the on-the-spot demand of arranging very much of installation caused electromagnetic emission to exceed standard moreover.

In addition, the second shell 5 and the variable frequency driver 6 are arranged on the peripheral wall of the first shell 1, so that the installation of the utility model is more flexible and convenient, and the second shell 5 can be oriented to a proper direction according to the actual situation without occupying too much space; specifically, for example, when one side of the permanent magnet synchronous motor is installed close to a wall, a permanent magnet synchronous motor in which the second housing 5 is installed on the outer peripheral wall of the first housing 1 away from the wall surface may be used; when the two sides of the permanent magnet synchronous motor are both walls, the second shell 5 can be arranged at the top of the peripheral wall of the first shell 1; if the second casing 5 is installed at both ends of the first casing 1, the total length of the motor is always increased, and other effective space is occupied.

The second housing 5 comprises a bottom plate 501 and a cover plate 502, the cover plate 502 and the bottom plate 501 enclose and form a second cavity 500, and the bottom plate 501 is arranged on the peripheral wall of the first housing 1; a convex block 7 is integrally formed on the peripheral wall of the first shell 1, a bottom plate 501 is detachably arranged on the convex block 7, and the contact surface between the bottom plate 501 and the convex block 7 is a plane; the bottom plate 501 and the bump 7 can be connected by bolts, so that the disassembly is further convenient, and the frequency conversion driver 6 is convenient to replace.

As shown in fig. 1 and 2, the second housing 5 is provided with a plurality of first connection terminals 8 and a plurality of second connection terminals 10, wherein the first connection terminals 8 are used for connecting with the motor body, the second connection terminals 10 are used for connecting with other devices such as a power supply, and specifically, one end of the connection line is connected with the first connection terminals 8, and the other end is connected with the motor body; in order to improve the heat dissipation efficiency, the second housing 5 is provided with a plurality of grooves 9 to increase the contact area between the second housing 5 and the outside.

Example two:

as shown in fig. 4 to 5, another permanent magnet synchronous motor integrated with a variable frequency drive is provided in the present embodiment, which is different from the first embodiment in that the second housing 5 and the first housing 1 are integrally formed by casting, the first cavity 100 communicates with the second cavity 500, and the first connection terminal 8 is omitted, one end of the connection line is used to connect the variable frequency drive 6, the other end of the connection line is connected with the motor body, and the connection line is located in the first cavity 100 and the second cavity 500, so that the overall structure is more compact, and the structure is simpler.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above two embodiments, and all other embodiments obtained by those skilled in the art without any inventive work belong to the protection scope of the present invention.

Claims

1. The utility model provides an integrated variable frequency drive's PMSM, includes motor body, motor body includes first shell (1), stator (2), rotor (3) and main shaft (4), be equipped with first cavity (100) in first shell (1), stator (2) rotor (3) with main shaft (4) all locate in first cavity (100), its characterized in that, be equipped with second shell (5) on first shell (1) periphery wall, be equipped with second cavity (500) in second shell (5), be equipped with variable frequency drive (6) in second cavity (500), variable frequency drive (6) with motor body electricity is connected.

2. An integrated variable frequency drive permanent magnet synchronous machine according to claim 1, characterized in that the second housing (5) comprises a bottom plate (501) and a cover plate (502), the cover plate (502) and the bottom plate (501) enclose and form the second cavity (500), and the bottom plate (501) is arranged on the peripheral wall of the first housing (1).

3. The permanent magnet synchronous motor of the integrated variable frequency drive according to claim 2, wherein a protrusion (7) is integrally formed on the peripheral wall of the first housing (1), the bottom plate (501) is detachably arranged on the protrusion (7), and the contact surface between the bottom plate (501) and the protrusion (7) is a plane.

4. The permanent magnet synchronous motor of the integrated variable frequency drive according to claim 2, further comprising a connecting wire, wherein a plurality of first connecting terminals (8) are disposed on the second housing (5), one end of the connecting wire is connected to the first connecting terminals (8), and the other end of the connecting wire is connected to the motor body.

5. The permanent magnet synchronous motor integrated with the variable frequency driver is characterized by further comprising a connecting wire, wherein the second shell (5) is integrally formed with the first shell (1), the first cavity (100) is communicated with the second cavity (500), one end of the connecting wire is connected with the variable frequency driver (6), the other end of the connecting wire is connected with the motor body, and the connecting wire is located in the first cavity (100) and the second cavity (500).

6. The PMSM with integrated variable frequency drive according to claim 1, wherein the stator (2) is fixedly mounted on the inner side wall of the first housing (1), and the rotor (3) is rotatably arranged on the main shaft (4).

7. An integrated variable frequency drive permanent magnet synchronous machine according to claim 1, characterized in that the second housing (5) is provided with grooves (9).

8. The permanent magnet synchronous motor of an integrated variable frequency drive according to claim 1, characterized in that a plurality of second connection terminals (10) are provided on the second housing (5).

9. An integrated variable frequency drive permanent magnet synchronous machine according to claim 1, characterized in that a brake (11) is further provided on the first housing (1).