TWM610230U - Anti-interference magnetic induction device and permanent magnet motor assembly with anti-interference magnetic induction device - Google Patents

Abstract

The invention discloses an anti-interference magnetic induction device and a permanent magnet motor assembly with the anti-interference magnetic induction device. The anti-interference magnetic induction device is used to install on a permanent magnet motor, the magnetic induction device is used to sense the magnetic force of a plurality of permanent magnets located in the permanent magnet motor; the magnetic induction device includes a magnetic flux conductor And a magnetic induction unit arranged on the magnetic flux conducting member. The magnetic flux conducting member is located between the rotor and the stator of the permanent magnet motor, and the magnetic flux conducting member is formed with an accommodating space and an opening communicating with the accommodating space; the magnetic induction unit is disposed in the permanent magnet motor. According to this, the magnetic induction unit can prevent interference from occurring through the magnetic flux conducting member.

Description

Anti-interference magnetic induction device and permanent magnet motor assembly with anti-interference magnetic induction device

The present creation relates to a magnetic induction device applied to the field of permanent magnet motors, in particular to a magnetic induction device capable of preventing interference and a permanent magnet motor assembly using the same.

Permanent magnet motors are widely used in industries, such as: aerators, smart robotic arms, electric locomotives, water pumps, electric bicycles, fans, electric cars, air-conditioning equipment, industrial fans, etc., aviation, household appliances and other fields. In order to achieve high-precision, high-dynamic performance speed and torque control; therefore, permanent magnet motors need to obtain the rotor position through a sensor, based on which to achieve accurate magnetic field orientation. Among them, the Hall position sensor has the advantages of low cost, small size, convenient installation, etc. Therefore, compared to other sensors (resolver, or photoelectric code disc, etc.), the Hall position sensor is more widely used .

However, it has been found that the transient magnetic flux field of the stator conductor and the core part of the permanent magnet motor in operation will cause the digitized switch of the Hall position sensor to produce incorrect switching, and such incorrect switching will cause the failure of the control circuit. All in all, it has been found that the Hall position sensor or switch used in the permanent magnet motor must be kept on the path of the magnetic circuit generated from the rotor, so that the permanent magnet motor is not affected by the stray magnetic flux in the environment.

Therefore, the author believes that the above-mentioned defects can be improved, and with great concentration of research and the application of scientific principles, finally proposed a reasonable design and effective improvement of the above-mentioned shortcomings of this creation.

The technical problem to be solved by this creation is to provide an anti-interference magnetic induction device and a permanent magnet motor assembly with the anti-interference magnetic induction device in view of the deficiencies of the prior art, which can effectively improve the possible defects of the existing permanent magnet motors.

This creative embodiment discloses an anti-interference magnetic induction device for installation on a permanent magnet motor. The permanent magnet motor includes a stator and a rotor. The stator has a plurality of iron cores. There is a coil winding on the core; the rotor is rotatably installed inside the stator, and the outer edge of the rotor is equipped with a plurality of permanent magnets, characterized in that: the magnetic induction device is installed in the permanent magnet motor , The magnetic induction device is used to sense the magnetic force of a plurality of the permanent magnets, and the magnetic induction device includes: a magnetic flux conductor located between the rotor and the coil windings of the plurality of iron cores, so The magnetic flux conducting member is formed with an accommodating space and an opening communicating with the accommodating space, the magnetic flux conducting member has a high magnetic permeability plate on the side far from the rotor; and a magnetic induction unit disposed in In the accommodating space of the magnetic flux conducting member.

This creative embodiment additionally discloses a permanent magnet motor assembly with an anti-interference magnetic induction device, characterized in that the permanent magnet motor assembly includes: a permanent magnet motor, which includes: a stator with a plurality of iron cores, Each of the iron cores has a coil winding; and a rotor, which is rotatably assembled on the stator, and a plurality of permanent magnets are installed on the outer edge of the rotor; and a magnetic induction device is arranged on the permanent magnet In the motor, the magnetic induction device is used to sense the magnetic force of a plurality of the permanent magnets, and the magnetic induction device includes: a magnetic flux conductor located between the rotor and the coil windings of the plurality of iron cores , The magnetic flux conducting member is formed with an accommodating space and an opening communicating with the accommodating space, the magnetic flux conducting member has a high-permeability plate on a side away from the rotor; and a magnetic induction unit, It is arranged in the accommodating space of the magnetic flux conducting member.

In summary, the anti-interference magnetic induction device and the permanent magnet motor assembly with the anti-interference magnetic induction device disclosed in this creative embodiment can provide shielding for the magnetic induction unit through the magnetic flux conduction member to ensure the The magnetic induction unit is not affected by stray magnetic flux.

In order to further understand the features and technical content of this creation, please refer to the following detailed descriptions and drawings about this creation. However, the drawings provided are only for reference and explanation, and are not used to limit this creation.

The following is a specific embodiment to illustrate the implementation of the "anti-interference magnetic induction device 100 and the permanent magnet motor assembly 1000 with the anti-interference magnetic induction device 100" disclosed in this creation, and those skilled in the art can be disclosed in this specification. Content understand the advantages and effects of this creation. This creation can be implemented or applied through other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the concept of this creation. In addition, the drawings of this creation are merely schematic illustrations, and are not depicted in actual size, and are stated in advance. The following implementations will further describe the related technical content of this creation in detail, but the disclosed content is not intended to limit the protection scope of this creation.

It should be understood that although terms such as "first", "second", and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another, or one signal from another signal. In addition, the term "or" used in this document may include any one or a combination of more of the associated listed items depending on the actual situation.

[First Embodiment]

1-9, this embodiment provides a permanent magnet motor assembly 1000 with an anti-interference magnetic induction device, which includes a permanent magnet motor 200 and a magnetic induction device 100 arranged in the permanent magnet motor 200; Wherein, the magnetic induction device 100 in the permanent magnet motor assembly 1000 is described as three in this embodiment, that is, the number of the magnetic induction device 100 in the permanent magnet motor assembly 1000 can also be multiple.

It should be noted that the above-mentioned permanent magnet motor 200 and the plurality of magnetic induction devices 100 are collectively defined as the permanent magnet motor assembly 1000 in this embodiment. But this creation is not limited to this. For example, a plurality of the magnetic induction devices 100 can also be used separately (for example, sold) or used with other components. The structure of each component of the permanent magnet motor assembly 1000 will be separately introduced below, and the connection relationship between the various components of the permanent magnet motor assembly 1000 will be described in a timely manner.

1 to 4, the permanent magnet motor 200 includes a stator 210, a rotor 220 disposed in the stator 210, and a cover 230 covering part of the stator 210. Specifically, the stator 210 has a housing 211 and a plurality of iron cores 212 arranged in the housing 211. The number of the plurality of iron cores 212 in this embodiment is 12, that is, The permanent magnet motor 200 has 12 slots. A plurality of the iron cores 212 are circumferentially arranged in the housing 211 at intervals, but they are not limited to those in this embodiment. In detail, the iron core end of each stator 210 has a shoe 2123, and each shoe 2123 has a curved arc structure and has an arc surface 2122. The arc surface 2122 and the rotor The outer edge of 220 corresponds in shape and does not contact each other. Each iron core 212 has a coil winding 2121. In this embodiment, each coil winding 2121 is composed of three interconnected coils; it should be noted that, Each of the coil windings 2121 is a technology known to those skilled in the art, and is not the focus of this case, so its details will not be described in detail here.

As shown in FIGS. 1, 3, and 5, the rotor 220 has a body 222 surrounding the body 222 with a plurality of supporting ribs 223, and a ring wall 224 disposed on the plurality of supporting ribs 223. And a plurality of permanent magnets 221 arranged on the ring wall 224. The main body 222 is a rod-shaped structure in this embodiment, and the number of the supporting ribs 223 in this embodiment is six, and they are arranged on the main body 222 at intervals. The ring wall 224 is assembled with a plurality of the supporting ribs 223. The number of the plurality of permanent magnets 221 in this embodiment is 14 (that is, the permanent magnet motor 200 has 14 poles), and each of the permanent magnets 221 has a sheet-like structure and is arranged around each other at intervals On the outer edge of the rotor 220, and the plurality of permanent magnets 221 and the plurality of shoes 2123 are kept at a predetermined distance without contact, that is, the plurality of permanent magnets 200 are in this embodiment The surface mount method is adopted; specifically, the permanent magnet motor 200 is an internal rotation motor in this embodiment, but it is not limited to what is contained in this embodiment. For example, the rotor 220 can be adjusted according to the type of permanent magnet motor. For example, when the permanent magnet motor 200 is an out-rotating motor, the rotor 220 can be arranged outside the stator 210.

It should be noted that, although the slot-to-pole ratio of the permanent magnet motor 200 in this embodiment is 12 to 14, it is not limited to that described in this embodiment. For example, the designer can adjust the slot-to-pole ratio according to design requirements, and design the permanent magnet motor 200 with 12 slots and 8 poles, or 24 slots with 26 poles, and so on.

1 to 3, the cover plate 230 covers a part of the stator 210; specifically, the cover plate 230 in this embodiment is a partial ring plate with a shape of 150 degrees. The cover 230 may be fixed to the housing 211 of the stator 210 through a plurality of fixing members (not shown in the figure), and shield a part of the plurality of iron cores 212.

Referring to FIGS. 5 to 7, a plurality of the magnetic induction devices 100 are disposed in the permanent magnet motor 200, and the magnetic induction device 100 is used to sense the magnetic force of the plurality of permanent magnets 221. Specifically, a plurality of the magnetic induction devices 100 are arranged on the cover plate 230 in this embodiment, and are located on the side of the cover plate 230 facing the rotor 220. Each of the magnetic induction devices 100 includes a magnetic flux conducting element 110 and a magnetic induction unit 120 disposed in the magnetic flux conducting element 110. The magnetic flux conducting element 110 is located between the rotor 220 and the rotor 220 in this embodiment. The upper position between the plurality of stators 210 (that is, the upper direction in FIG. 8), and does not contact the rotor 220 and the plurality of stators 210, but is not limited to what is contained in this embodiment. For example, although a plurality of the magnetic induction devices 100 are arranged on the cover 230 in this embodiment, the plurality of the magnetic induction devices 100 of the present invention can be arranged on the Inside the shoe 2123 of the stator 210, and in response to the compact design of the permanent magnet motor 200, the outer dimensions are fine-tuned by the rotor 220 itself.

As shown in FIGS. 7-9, the magnetic flux conducting member 110 of each magnetic induction device 100 is disposed on the cover 230, and is located on the plurality of permanent magnets 221 and the plurality of permanent magnets 221 of the rotor 220 Between the coil windings 2121 of the iron core 212, the manner in which a plurality of the magnetic flux conducting members 110 are arranged on the cover 230 may be welding or bonding. Specifically, each of the magnetic flux conducting members 110 has a groove structure, and an accommodating space SP and an opening OP communicating with the accommodating space SP are formed, so that each of the magnetic flux conducting members 110 is The cross section in this embodiment is L-shaped (as shown in Figure 9). In a preferred embodiment, a plurality of the magnetic flux conducting members 110 have a high magnetic permeability plate 1111 on the side away from the rotor 220, and the material of the high magnetic permeability plate 1111 is a high magnetic permeability material It is formed by a thin metal sheet, which can provide a good magnetic flux path, and the other side plates of the plurality of magnetic flux conducting members 110 are made of non-magnetic materials.

The plurality of magnetic induction units 120 are respectively arranged in the accommodating spaces SP of the plurality of magnetic flux conducting members 110. A plurality of the magnetic sensing units 120 are Hall Sensors in this embodiment, and each of the magnetic sensing units 120 further has a sensing chip 121, and the sensing chip 121 is facing The corresponding opening OP of the magnetic flux conducting member 110; that is, each of the sensing chips 121 faces the corresponding permanent magnet 221.

To put it another way, as shown in FIG. 9, a magnetic flux M path between the plurality of permanent magnets 221 and the plurality of magnetic induction units 120 is represented by a dotted line. The magnetic flux M passes through the plurality of permanent magnets 221, and enters the corresponding magnetic induction device 100 through the gaps (air gaps) between the plurality of permanent magnets 221 and the plurality of magnetic induction units 120; Then, the magnetic flux M passes through the gaps (air gaps) between the plurality of magnetic flux conductors 110 and the plurality of magnetic induction units 120, and passes through the plurality of magnetic induction units 120 and the plurality of permanent magnets. The gap between the magnets 221 enters the rotor 220 and returns to the plurality of permanent magnets 221, that is, the line segment path of the magnetic flux M as shown in FIG. 9.

[Second Embodiment]

As shown in FIG. 11, it is the second embodiment of the creation. This embodiment is similar to the above-mentioned first embodiment, and the similarities between the two embodiments will not be repeated. However, this embodiment is compared with the above-mentioned first embodiment. The main differences between the embodiments are:

The magnetic induction device 100 further has an induction magnetic ring 130. The induction magnetic ring 130 is disposed on the side of the rotor 220 facing the cover 230 and surrounds the rotation axis of the rotor 220. The induction magnetic ring 130 It is made of a magnetically conductive material and corresponds to the magnetic poles of the plurality of permanent magnets 221 on the rotor 220. Specifically, the inductive magnetic ring 130 has a plurality of N-pole parts and a plurality of S-pole parts through a magnetizing method, and the plurality of the N-pole parts and the plurality of the S-pole parts are connected to the plurality of the permanent magnets. 221's magnetic correspondence.

The openings OP of the plurality of magnetic flux conducting parts 110 face the induction magnetic ring 130, and the magnetic induction units 120 in the plurality of magnetic flux conducting parts 110 can pass through the plurality of N of the induction magnetic ring 130. The pole part and the plurality of S pole parts confirm the positions of the plurality of permanent magnets 221.

[Technical effects of this creative embodiment]

In summary, the anti-interference magnetic induction device 100 and the permanent magnet motor assembly 1000 disclosed in this creative embodiment can both provide shielding for the magnetic induction unit 120 through a plurality of the magnetic flux conductors 110. To ensure that the magnetic induction unit 120 is not affected by stray magnetic flux. In other words, the magnetic flux conducting member 110 can prevent external interference or transient flux from passing through the coil windings 2121 of the plurality of iron cores 212 to affect the magnetic induction unit 120.

To further explain, assuming that any existing permanent magnet motor assembly is not equipped with the anti-interference magnetic induction device 100 of this invention, the magnetic flux generated by the coil winding will partially leak to the Hall position sensor. (That is, compared with the magnetic induction unit 120 of this creation), the Hall position sensor is turned on (activated). In contrast, the permanent magnet motor assembly 1000 of the present creation shields stray magnetic flux through the magnetic flux conductor 110, so that the leaked magnetic flux will not affect the magnetic induction unit 120, so as to ensure that the magnetic induction unit 120 is ideal. To operate.

The content disclosed above is only a preferred and feasible embodiment of this creation, and does not limit the scope of patent application for this creation. Therefore, all equivalent technical changes made using this creation specification and schematic content are included in the application for this creation. Within the scope of the patent.

1000: Permanent magnet motor assembly 100: Magnetic induction device 110: Magnetic flux conductor 1111: High magnetic permeability plate 120: Magnetic induction unit 130: induction magnetic ring 200: Permanent magnet motor 210: Stator 211: Shell 212: iron core 2121: Coil winding 2122: curved surface 2123: Boots 220: Rotor 221: permanent magnet 222: body 223: Support Rib 224: Ring Wall 230: cover SP: housing space OP: opening M: magnetic flux

Fig. 1 is an exploded schematic diagram of the permanent magnet motor assembly of the first embodiment of the creation.

Figure 2 is a three-dimensional schematic diagram of the permanent magnet motor assembly of the first embodiment of the creation.

Fig. 3 is a schematic top view of the permanent magnet motor assembly of the first embodiment of the creation.

Fig. 4 is a schematic side view of the permanent magnet motor assembly of the first embodiment of the creation.

Fig. 5 is a schematic plan view of Fig. 4 along the line V-V.

Figure 6 is a perspective view of the cover plate of the permanent magnet motor assembly of the first embodiment of the creation.

Fig. 7 is an enlarged schematic diagram of area VII in Fig. 6.

Fig. 8 is a schematic plan view of Fig. 3 along the line VIII-VIII.

FIG. 9 is an enlarged schematic diagram of the IX area in FIG. 8.

Fig. 10 is a schematic cross-sectional view when the magnetic induction device of the permanent magnet motor assembly of the first embodiment is located on the shoe part of the stator.

11 is a schematic cross-sectional view of the permanent magnet motor assembly of the second embodiment.

1000: Permanent magnet motor assembly

100: Magnetic induction device

200: Permanent magnet motor

210: Stator

211: Shell

212: iron core

2121: Coil winding

2123: Boots

220: Rotor

221: permanent magnet

222: body

223: Support Rib

224: Ring Wall

230: cover

Claims (10)

An anti-interference magnetic induction device for installing on a permanent magnet motor. The permanent magnet motor includes a stator and a rotor. The stator has a plurality of iron cores, and each of the iron cores has a coil winding. The rotor is rotatably installed inside the stator, and the outer edge of the rotor is equipped with a plurality of permanent magnets, characterized in that: The magnetic induction device is arranged in the permanent magnet motor, the magnetic induction device is used to sense the magnetic force of a plurality of the permanent magnets, and the magnetic induction device includes: A magnetic flux conducting member is located between the rotor and the coil windings of the plurality of iron cores, the magnetic flux conducting member is formed with an accommodating space and an opening communicating with the accommodating space, the The magnetic flux conducting member has a high magnetic permeability plate on the side away from the rotor; and A magnetic induction unit is arranged in the accommodating space of the magnetic flux conducting member. The anti-interference magnetic induction device according to claim 1, wherein the magnetic induction unit is a Hall position sensor. The anti-interference magnetic induction device according to claim 1, wherein the high-permeability plate is formed of a metal sheet made of a high-permeability material, which can provide a good magnetic flux path. The anti-interference magnetic induction device according to claim 1, wherein the magnetic flux conductor has a groove structure and is formed with the accommodating space and the opening, and the opening faces the permanent magnet with the shortest distance. The anti-interference magnetic induction device according to claim 4, wherein when the magnetic induction unit is installed in the accommodating space, a sensing chip of the magnetic induction unit should face the opening of the magnetic flux conducting member . A permanent magnet motor assembly with anti-interference magnetic induction device, characterized in that, the permanent magnet motor assembly includes: A permanent magnet motor, which contains: The stator has a plurality of iron cores, and each of the iron cores has a coil winding; and A rotor rotatably assembled on the stator, and a plurality of permanent magnets are installed on the outer edge of the rotor; and A magnetic induction device is arranged in the permanent magnet motor, the magnetic induction device is used to sense the magnetic force of a plurality of the permanent magnets, and the magnetic induction device includes: A magnetic flux conducting member is located between the rotor and the coil windings of the plurality of iron cores, the magnetic flux conducting member is formed with an accommodating space and an opening communicating with the accommodating space, the The magnetic flux conducting member has a high magnetic permeability plate on the side away from the rotor; and A magnetic induction unit is arranged in the accommodating space of the magnetic flux conducting member. The permanent magnet motor assembly with anti-interference magnetic induction device according to claim 6, wherein the magnetic induction unit is a Hall position sensor. The permanent magnet motor assembly with anti-interference magnetic induction device according to claim 6, wherein the high magnetic permeability plate is formed of a metal sheet of high magnetic permeability material, which can provide a good magnetic flux path. The permanent magnet motor assembly with the anti-interference magnetic induction device according to claim 6, wherein the magnetic flux conducting member has a groove structure and is formed with the accommodating space and the opening, and the opening faces the shortest distance Of the permanent magnet. The permanent magnet motor assembly with an anti-interference magnetic induction device according to claim 9, wherein when the magnetic induction unit is installed in the accommodating space, a sensing chip of the magnetic induction unit should face the magnetic Through the opening of the conductive member.

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