CN210608756U - Permanent magnet synchronous motor - Google Patents
Permanent magnet synchronous motor Download PDFInfo
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- CN210608756U CN210608756U CN201922062103.1U CN201922062103U CN210608756U CN 210608756 U CN210608756 U CN 210608756U CN 201922062103 U CN201922062103 U CN 201922062103U CN 210608756 U CN210608756 U CN 210608756U
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- permanent magnet
- magnet synchronous
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Abstract
The application provides a permanent magnet synchronous motor, which comprises a shell, wherein a cavity is formed in the shell; the stator assembly is arranged on the inner wall of the cavity in the shell; the stator winding is connected and arranged on the stator assembly; the rotor assembly is arranged on the inner wall of the stator assembly opposite to the shell; and the control assembly is arranged on one end surface of the stator assembly and used for controlling the motor to be electrified and closed.
Description
Technical Field
The application relates to the field of motor manufacturing, in particular to a permanent magnet synchronous motor.
Background
The current motor is driven to operate by utilizing the magnetic field generated by current passing through a coil and forming a directional magnetic force action between a stator and a rotor through the on-off or commutation of the current, and the electric excitation working state of an iron core of the motor is generally in a non-linear region. But it has the problems of slow start-up speed and low security.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a permanent magnet synchronous machine, this permanent magnet synchronous machine is used for solving prior art, and motor start speed is slow, the problem that the security is low.
In order to achieve the above object, an embodiment provides a permanent magnet synchronous motor, including a casing, a cavity formed inside the casing; the stator assembly is arranged on the inner wall of the cavity in the shell; the stator winding is connected and arranged on the stator assembly; the rotor assembly is arranged on the inner wall of the stator assembly opposite to the shell; and the control assembly is arranged on one end surface of the stator assembly and used for controlling the motor to be electrified and closed.
In the implementation process, the stator winding arranged on the stator assembly can accelerate the starting speed of the rotor assembly when the control assembly controls the motor to be electrified, and the rotor assembly can enter into synchronous rotation more quickly.
In an alternative embodiment, the stator assembly includes a stator backbone.
In an alternative embodiment, the stator assembly comprises windings comprising: the first winding is arranged around the outer ring of the stator framework, and one end of the first winding is connected with an external power supply. And the second winding is arranged around the inner ring of the stator framework, and one end of the second winding is connected with an external power supply.
In an alternative embodiment, the other end of the first winding is connected to the other end of the second winding.
In an alternative embodiment, the housing comprises: a front end cover; and the rear end cover is connected with the front end cover in a buckling manner to form a shell.
In an alternative embodiment, the rotor assembly comprises: the rotating shaft is connected and arranged between the front end cover and the rear end cover; and the rotor is arranged between the rotating shaft and the stator assembly and is sleeved on the rotating shaft.
In an alternative embodiment, the control assembly comprises: the control plate is arranged on one end surface of the stator assembly; the first alternating current switch is arranged on the control panel, and one end of the first alternating current switch is connected with the first winding and the second winding; and the second alternating current switch is arranged on the control panel, one end of the second alternating current switch is electrically connected with the other end of the first alternating current switch, and the other end of the second alternating current switch is electrically connected with the second winding.
In an alternative embodiment, the front end cap is threadably connected to the rear end cap.
In an alternative embodiment, the stator assembly further comprises: the spacer is arranged on the stator framework and extends towards the interior of the stator framework; and the stator pole is arranged at one end of the spacer extending to the inside of the stator framework.
In an alternative embodiment, the first winding is wound on the spacer and the stator pole; the second winding is arranged on the spacer and the stator framework.
In the implementation process, the control component can control the first alternating current switch to be switched on and the second alternating current switch to be switched off; simultaneously acquiring alternating current input voltage information of the motor and initial position information of a rotor; judging whether the alternating current input voltage information and the initial position information simultaneously meet a first preset condition; when the alternating current input voltage information and the initial position information simultaneously meet a first preset condition, maintaining the on-off states of the two switches; acquiring the rotating speed of a rotor; judging whether the rotating speed meets a second preset condition or not; and when the rotating speed is judged to meet the second preset condition, the first alternating current switch is controlled to be switched off, and the second alternating current switch is controlled to be switched on, so that the purpose of starting the motor is achieved.
Additional features and advantages of the present application will be described in detail in the detailed description which follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a sectional view of a permanent magnet synchronous motor according to an embodiment of the present application;
FIG. 2 is a schematic structural view of the stator assembly shown in FIG. 1;
FIG. 3 is a schematic view of the stator winding assembly of FIG. 1;
FIG. 4 is a schematic view of the installation of the first winding shown in FIG. 2;
FIG. 5 is a schematic view of the installation of the second winding shown in FIG. 2;
fig. 6 is a circuit diagram of the permanent magnet synchronous motor shown in fig. 1;
fig. 7 is a motor starting method according to an embodiment of the present disclosure;
FIG. 8 illustrates another method for starting a motor according to an embodiment of the present disclosure;
fig. 9 is another motor starting method provided in the embodiments of the present application.
Icon: the motor comprises a motor 1, a shell 10, a front end cover 11 and a rear end cover 12;
stator winding 30, first winding 31, second winding 32;
rotor assembly 40, rotating shaft 41, rotor 42;
a control assembly 50, a first ac switch 51, and a second ac switch 52.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Fig. 1 is a cross-sectional view of a permanent magnet synchronous motor 1 provided in an embodiment of the present application, where the motor 1 includes a casing 10, a stator assembly 20, a stator winding 30, a rotor assembly 40, and a control assembly 50. In which a cavity is formed inside the cabinet 10 to accommodate the components into the cabinet 10.
In one embodiment, the stator assembly 20 is disposed on an inner wall of a cavity inside the casing 10. The stator winding 30 is connectively disposed on the stator assembly 20. The rotor assembly 40 is disposed at a side of the stator assembly 20 opposite to an inner wall of the casing 10. The control assembly 50 is disposed at an end surface of the stator assembly 20, and is used for controlling the motor 1 to be powered on and off. Under the action of a built-in control assembly 50 of the permanent magnet synchronous motor 1, the conduction form of the stator winding 30 is controlled, so that under the condition that the permanent magnet synchronous motor 1 is electrified, an air gap between the stator assembly 20 and the rotor assembly 40 forms a magnetic field, and the rotor assembly 40 rotates.
In one embodiment, the power supply of the permanent magnet synchronous motor 1 is single-phase input alternating current with a voltage of 110V or 220V.
In an embodiment, the casing 10 is composed of a front cover 11 and a rear cover 12, and the front cover 11 and the rear cover 12 may be connected to form the casing 10 in at least one or more of a snap connection, a threaded connection, a rigid connection, and a socket connection.
In one embodiment, the rotor assembly 40 includes a rotating shaft 41 and a rotor 42. The rotating shaft 41 is connected between the front cover 11 and the rear cover 12. The rotor 42 is sleeved on the rotating shaft 41, and a gap is left between the rotating shaft 41 and the stator assembly 20 and between the stator assembly 20 to form an air gap portion. In one embodiment, the rotor 42 has a uniform number of rotor poles and stator poles 23, with a uniform number of pairs.
Fig. 2 is a schematic view of the stator assembly 20 shown in fig. 1, in which a stator frame 21 of the stator assembly 20 is provided with a spacer 22 from outside to inside, one end of the spacer 22 is connected to an outer frame of the stator assembly 20, and the other end is provided with a stator pole 23. Slots are formed between the webs 22 and the webs 22. in the embodiment shown in fig. 2, the stator assembly 20 may be a four slot, four pole design. In one embodiment, the stator frame 21, the spacer 22, and the stator poles 23 are integrally stamped.
Fig. 3, 4 and 5 are schematic views of the installation of the stator winding 30 shown in fig. 1, and the stator winding 30 includes a first winding 31 and a second winding 32. The first winding 31 is disposed around the inner ring of the stator frame 21, and one end of the first winding is connected to an external power source. And a second winding 32 disposed around an outer ring of the stator frame 21 and having one end connected to an external power source.
In one embodiment, one end of the second winding 32 is connected to an external power source, and after the other end is wound around any one of the spacers 22 for several turns, the second winding extends to the next spacer 22 along the stator frame 21 and is wound for several turns in a clockwise or counterclockwise order, and after all the spacers 22 are wound in sequence, the other end of the second winding 31 is connected to one end of the first winding 31, and after the other end of the first winding 31 is wound around the spacers 22 in a reverse order to that of the second winding 32, the first winding 31 is wound around the spacers 22 for several turns, extends to the next spacer 22 along the stator pole 23 and is wound for several turns, and is connected to the external power source. In one embodiment, an alternating current is connected between one end of the first winding 31 and the other end of the second winding 32.
Fig. 6 is a circuit diagram of the permanent magnet synchronous motor 1 shown in fig. 1. The control assembly 50 includes: a control board, a first ac switch 51 and a second ac switch 52. Wherein, the control plate is arranged on one end surface of the stator assembly 20; the first ac switch 51 is disposed on the control board, one end of the first ac switch is electrically connected to the first winding 31 and the second winding 32, and the other end of the first ac switch is electrically connected to the second ac switch 52; the second ac switch 52 is disposed on the control board, and has one end electrically connected to the first ac switch 51 and the other end electrically connected to the second winding 32.
Fig. 7 is a motor starting method provided in an embodiment of the present application, and is applied to the control of the permanent magnet synchronous motor 1. In one embodiment, the control component 50 is provided with a processor and a memory, the memory is used for storing executable programs, and the processor is used for executing the programs. The control component 50 is configured to control the motor 1 to enter a synchronous rotational speed operation process after the motor 1 is successfully started according to the ac input voltage information and the on-off conditions of the first ac switch 51 and the second ac switch 52 in the starting process of the motor 1. The control unit 50 performs:
step 701 controls the first ac switch 51 to be turned on and the second ac switch 52 to be turned off.
In this step, when the permanent magnet synchronous motor 1 is started, it is necessary to energize the stator winding 30 so that a unidirectional rotating magnetic field is formed in the air gap portion by the alternating current, and the rotor 42 starts to rotate. When the first ac switch 51 is turned on alone, the starting current of the permanent magnet synchronous motor 1 and the current density of the first winding 31 are increased, so that the starting torque of the rotor 42 is increased, and the time for reaching the synchronous rotational speed is reduced.
Step 702 obtains ac input voltage information of the motor 1.
In this step, when the ac power input to the motor 1 is single-phase ac power, the ac input voltage is a single-phase sine wave.
Step 703 acquires initial position information of the rotor 42 while acquiring alternating input voltage information of the motor 1.
In this step, the position information of the rotor 42 may be the current polarity of the rotor 42.
Step 704 determines whether the ac input voltage information and the initial position information simultaneously satisfy a first predetermined condition.
In this step, in order to realize safe start, the rotation speed synchronization is continued only when the ac input voltage information and the initial position information simultaneously reach the preset condition.
And when the alternating current input voltage information and the initial position information simultaneously meet a first preset condition, maintaining the on-off states of the two switches.
In one embodiment, the position information is magnetic pole information of the rotor, and the first predetermined condition is that the magnetic pole information and the direction of the ac input voltage current change simultaneously.
In this step, the ac input voltage information and the initial position information satisfy the first preset condition at the same time, maintain the current state, and continue the synchronization.
Step 705 obtains the rotational speed of the rotor 42.
In this step, the rotation speed of the rotor 42 is obtained for determining whether the motor 1 currently reaches the synchronous state.
Step 706 judges whether the rotation speed satisfies a second preset condition.
In this step, the synchronization state is determined based on the rotation speed. The second predetermined condition is a proportion range of the current rotation speed reaching the target rotation speed, and in an embodiment, the second predetermined condition may be that the current rotation speed is 70% of the target rotation speed when the motor 1 enters the synchronous state.
Step 707 controls the first ac switch 51 to be turned off and the second ac switch 52 to be turned on when it is determined that the rotation speed satisfies the second preset condition.
In this step, after the rotation speed of the motor 1 reaches 70% of the synchronous rotation speed, the mode is switched to the mode in which the first winding 31 and the second winding 32 are connected in series and then conducted, and the permanent magnet synchronous motor 1 smoothly enters the synchronous rotation speed running state.
Fig. 8 is an embodiment of a motor starting method provided in the embodiment of the present application, wherein the control component 50 is configured to control a process of self-protecting the motor 1 after a start failure according to ac input voltage information and on/off conditions of the first ac switch 51 and the second ac switch 52 during a start process of the motor 1. The control unit 50 performs:
step 801 controls the first ac switch 51 to be turned on and the second ac switch 52 to be turned off.
In this step, refer to the description of step 701 in the above embodiment.
Step 802 acquires ac input voltage information of the motor 1.
In this step, refer to the description of step 702 in the above embodiment.
Step 803 acquires initial position information of the rotor 42.
In this step, refer to the description of step 703 in the above embodiment.
Step 804 determines whether the ac input voltage information and the initial position information simultaneously satisfy a first preset condition.
In this step, refer to the description of step 704 in the above embodiment.
Step 805 controls the first ac switch 51 to be turned off when the ac input voltage information and the initial position information do not satisfy the first preset condition.
In this step, in order to prevent damage to the permanent magnet synchronous motor 1 and safety during starting, the supply of power to the first winding 31 is immediately cut off upon a failed start.
Fig. 9 is another embodiment of a motor starting method provided in the embodiment of the present application, wherein the control component 50 is configured to control the motor 1 to restart according to the ac input voltage information and the on/off conditions of the first ac switch 51 and the second ac switch 52 during the starting process of the motor 1.
Step 901 controls the first ac switch 51 to be turned on and the second ac switch 52 to be turned off.
In this step, refer to the description of step 701 in the above embodiment.
Step 902 obtains ac input voltage information for the motor 1.
In this step, refer to the description of step 702 in the above embodiment.
Step 903 acquires initial position information of the rotor 42.
In this step, refer to the description of step 703 in the above embodiment.
Step 904 determines whether the ac input voltage information and the initial position information simultaneously satisfy a first predetermined condition.
In this step, refer to the description of step 704 in the above embodiment.
Step 905 acquires the rotational speed of the rotor 42.
In this step, refer to the description of step 705 in the above embodiment.
Step 906 determines whether the rotation speed satisfies a second preset condition.
In this step, reference is made to the description of step 706 in the above embodiment.
In an embodiment, when the rotation speed is determined not to satisfy the second predetermined condition, the on/off states of the two switches are maintained until the rotation speed satisfies the second predetermined condition.
In this step, the rotation speed of the rotor 42 during the starting process is continuously detected until the rotation speed satisfies the condition for entering synchronization.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A permanent magnet synchronous motor is characterized by comprising
A housing having a cavity formed therein;
a stator assembly disposed at an inner wall of the cavity inside the case;
the stator winding is connected and arranged on the stator assembly;
the rotor assembly is arranged on the inner wall of the stator assembly opposite to the shell;
and the control assembly is arranged on one end surface of the stator assembly and used for controlling the motor to be electrified and shut down.
2. The permanent magnet synchronous motor of claim 1, wherein the stator assembly comprises a stator backbone.
3. The permanent magnet synchronous motor of claim 2, wherein the stator winding comprises:
the first winding is arranged around the inner ring of the stator framework, and one end of the first winding is connected with an external power supply;
and the second winding surrounds the outer ring of the stator framework, and one end of the second winding is connected with an external power supply.
4. A permanent magnet synchronous machine according to claim 3, characterized in that the other end of the first winding is connected with the other end of the second winding.
5. The permanent magnet synchronous motor of claim 1, wherein the casing comprises:
a front end cover;
and the rear end cover is connected with the front end cover through a buckle to form the shell.
6. The permanent magnet synchronous machine of claim 5, wherein the rotor assembly comprises:
the rotating shaft is connected and arranged between the front end cover and the rear end cover;
and the rotor is arranged between the rotating shaft and the stator component and is sleeved on the rotating shaft.
7. The permanent magnet synchronous motor of claim 4, wherein the control assembly comprises:
the control plate is arranged on one end surface of the stator assembly;
the first alternating current switch is arranged on the control board, and one end of the first alternating current switch is connected with the first winding and the second winding;
and the second alternating current switch is arranged on the control panel, one end of the second alternating current switch is electrically connected with the other end of the first alternating current switch, and the other end of the second alternating current switch is electrically connected with the second winding.
8. The permanent magnet synchronous motor of claim 5, wherein the front end cap is threadedly connected to the rear end cap.
9. The permanent magnet synchronous motor of claim 3, wherein the stator assembly further comprises:
the spacer is arranged on the stator framework and extends towards the interior of the stator framework;
and the stator pole is arranged at one end of the spacer extending to the interior of the stator framework.
10. The permanent magnet synchronous motor of claim 9, wherein the first winding is wound on the spacers and the stator poles; the second winding is arranged on the spacer and the stator framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922062103.1U CN210608756U (en) | 2019-11-26 | 2019-11-26 | Permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922062103.1U CN210608756U (en) | 2019-11-26 | 2019-11-26 | Permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210608756U true CN210608756U (en) | 2020-05-22 |
Family
ID=70694077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922062103.1U Active CN210608756U (en) | 2019-11-26 | 2019-11-26 | Permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210608756U (en) |
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2019
- 2019-11-26 CN CN201922062103.1U patent/CN210608756U/en active Active
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