CN106961196A - Structure of rotor of synchronous motor - Google Patents

Abstract

The present invention provides a structure of a rotor of a synchronous motor, including a rotor, wherein the rotor is composed of a body and a main shaft penetrating the body, wherein a plurality of long strip-shaped through holes are provided in the axial direction of the body, and non-magnetic conductive materials are arranged in the through holes to enhance the structural strength of the synchronous motor, and counterweight holes are provided in the non-magnetic conductive materials on the heavier side of the rotor, so as to achieve the purpose of providing a structure of a rotor of a synchronous motor that can achieve a counterweight effect while avoiding damaging the motor structure.

Description

The structure of the rotor of a synchronous motor

technical field

The present invention relates to a synchronous motor, in particular to the structure of a rotor of the synchronous motor.

Background technique

In today's society, motors are indispensable equipment in both industry and people's livelihood. In recent years, the technology of motors has also changed with each passing day. There are many types of motors on the market. The magnetic field rotates synchronously, so there is no induced current and no secondary copper loss, so it has the advantages of high energy conversion efficiency, simple manufacturing process, no need to invest a large amount of money to purchase processing equipment, and low production cost.

Synchronous motors mainly use magnetic resistance to operate. Magnetic resistance is different from the Lorentz force used in general motors. The principle of magnetic resistance is that when the magnetic force lines form a closed loop in space, the magnetic force lines will choose to go through the magnetic resistance. The lowest path, so when the rotor is placed in the stator magnetic field, the magnetic field lines will drive the rotor to move to the position where the reluctance is the lowest, because the rotor mainly lies in the rotor groove formed on the rotor, so that the reluctance produces the maximum and minimum reluctance difference, and then produces Reluctance torque, as shown in Figure 1, is a rotor 90 of synchronous motor, and this rotor 90 is made of a body 91 and a main shaft 92 that passes through this body 91, and the two ends of this body 91 have a first An end face 911 and a second end face 912, the direction extending from the first end face 911 to the second end face 912 is an axial direction A, the body 91 has a plurality of elongated through holes 93 in the axial direction A, and each of the through holes 93 Forming a plurality of connecting parts 94, because the body 90 has these perforations 93, the strength of the structure of the synchronous motor is weak, and the quality is not easy to grasp, and it is applied to applications with high speed or low speed and high torque. The rotor 90 is close to the The shear stress and tensile stress generated in the perforation 93 will cause problems or even damage to the structural strength of the rotor.

What's more, the rotor of the synchronous motor is prone to deficiencies such as yaw and dynamic balance deviation. In order to overcome this problem, the industry has developed several counterweight methods. The known counterweight method is based on the heavier part of the body 91. A plurality of counterweight holes 95 are provided in the connecting portion 94 on the side to balance the weight of the body 91 as a whole. However, this method tends to make the structure of the rotor 90 more fragile and greatly increases the risk of damage.

Contents of the invention

The invention provides a rotor structure of a synchronous motor, the main purpose of which is to enhance the structural strength of the synchronous motor.

Another purpose is to provide a structure that avoids damage to the motor structure, that is, the rotor structure of the synchronous motor that achieves the counterweight effect.

In order to achieve the aforementioned purpose, the structure of the rotor of the synchronous motor of the present invention includes:

A rotor, the rotor is composed of a main body and a main shaft passing through the main body, the main body has a first end surface and a second end surface opposite, the direction extending from the first end surface to the second end surface is a Axially, the main body axially defines a plurality of elongated through holes, and at least one of the through holes has a non-magnetic material inside.

Preferably, a counterweight hole is opened in the non-magnetic material on the heavier side of the rotor.

As can be seen from the foregoing, the structure of the rotor of the synchronous motor of the present invention is mainly through the arrangement of non-magnetic materials in the perforations, thereby enhancing the structural strength of the synchronous motor, and the non-magnetic materials on the heavier side of the rotor are provided with The purpose of the counterweight hole is to provide a structure of the rotor of the synchronous motor that avoids damage to the motor structure, that is, achieves the counterweight effect.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings used in the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings on the premise of not paying creative work.

FIG. 1 is a perspective view of a known synchronous motor.

Fig. 2 is a perspective view of the structure of the rotor of the synchronous motor of the present invention.

Fig. 3 is a perspective view of the structure of the rotor of the synchronous motor of the present invention.

Fig. 4 is a perspective view of a second embodiment of the structure of the rotor of the synchronous motor of the present invention.

Fig. 5 is a perspective view of another aspect of the synchronous motor.

Fig. 6 is a perspective view of a third embodiment of the structure of the rotor of the synchronous motor of the present invention.

Fig. 7 is a perspective view of a preferred embodiment of the structure of the rotor of the synchronous motor of the present invention.

Explanation of reference signs

current technology

Rotor 90 Body 91

Spindle 92 first end face 911

Second end face 912 Perforation 93

Connecting part 94 Weight hole 95

Axial A

this invention

Rotor 10 Body 11

First end face 111 Second end face 112

Circumferential surface 113 Spindle 12

Perforation 13 Grooves 14

Permanent magnets 15 Non-magnetic materials 20

Counterweight hole 21

Axial B

detailed description

The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. 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.

The present invention provides a structure of a rotor of a synchronous motor, as shown in Figures 2 to 7, including:

A rotor 10, the rotor 10 is composed of a body 11 and a main shaft 12 passing through the body 11, the body 11 has a first end face 111 and a second end face 112 opposite, the first end face 111 extends The direction to the second end surface 112 is an axial direction B. The main body 11 has a plurality of elongated through holes 13 in the axial direction B. At least one of the through holes 13 has a non-magnetic material 20 in it, and at least one of the through holes 13 has a A permanent magnet 15, preferably, the non-magnetic material 20 is thermoplastic or thermosetting plastic.

In the second embodiment of the present invention, as shown in FIG. 4 , the non-magnetically permeable material 20 is disposed on each of the through holes 13, and the non-magnetically permeable material 20 is formed from the first end surface 111 and the second end surface 111 of the rotor 10 respectively. The end surface 112 is extended to form a thickness and covers the first end surface 111 and the second end surface 112 , thereby increasing the structural strength of the two sides of the rotor 10 .

In the third embodiment of the present invention, as shown in FIG. 5 and FIG. 6, the rotor 10 has a circumferential surface 113 connecting the first end surface 111 and the second end surface 112, and the rotor is opened in the axial direction B on the circumferential surface 113. At least two grooves 14, the non-magnetic permeable material 20 is disposed in each of the through holes 13, the non-magnetic permeable material 20 respectively extends from the first end surface 111 and the second end surface 112 of the rotor 10 to form a thickness, and covers The first end surface 111 and the second end surface 112 are filled with the grooves 14 , thereby increasing the strength of the overall structure of the rotor 10 .

Preferably, as shown in FIG. 7 , at least one counterweight hole 21 is provided in the non-magnetic material 20 on the heavier side of the rotor 10 , so as to average the weight of the rotor 10 and achieve the effect of counterweight.

As can be seen from the foregoing, the structure of the rotor of the synchronous motor of the present invention is mainly by setting the non-magnetic material 20 in the perforations 13, thereby enhancing the structural strength of the synchronous motor, and the non-conductive material 20 on the heavier side of the rotor 10. The counterweight hole 21 is provided in the magnetic material 20 to achieve the purpose of providing a rotor structure of the synchronous motor that avoids damage to the motor structure, that is, achieves the counterweight effect.

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 present invention. within the scope of protection.

Claims (6)

1. The structure of the rotor of a synchronous motor, is characterized in that, comprises: A rotor, the rotor is composed of a main body and a main shaft passing through the main body, the main body has a first end surface and a second end surface opposite, the direction extending from the first end surface to the second end surface is an axis In the axial direction, the main body is provided with a plurality of through holes, and at least one of the through holes has a non-magnetic material inside. 2. The structure of the rotor of the synchronous motor as claimed in claim 1, characterized in that, The non-magnetically permeable material is disposed on each of the through holes, and the non-magnetically permeable material is respectively extended from the first end surface and the second end surface of the rotor to form a thickness, and covers the first end surface and the second end surface. 3. The structure of the rotor of synchronous motor as claimed in claim 1, is characterized in that, The rotor has a circumferential surface connecting the first end surface and the second end surface. The rotor has at least two grooves axially formed on the circumferential surface. A thickness is formed extending from the first end surface and the second end surface of the rotor, covers the first end surface and the second end surface, and fills up the grooves. 4. The structure of the rotor of the synchronous motor as claimed in any one of claims 1 to 3, characterized in that, A counterweight hole is opened in the non-magnetic material on the heavier side of the rotor. 5. The structure of the rotor of synchronous motor as claimed in claim 1, is characterized in that, The perforation is elongated. 6. The structure of the rotor of the synchronous motor as claimed in claim 1, characterized in that, There is a permanent magnet in at least one of the through holes.