阅读说明：本技术 永磁直流无刷电机 (Permanent-magnet DC brushless motor ) 是由 周俊 于 2021-10-11 设计创作，主要内容包括：本发明涉及无刷电机技术领域,尤其是涉及一种永磁直流无刷电机,包括：机罩,定子,固定于所述机罩内,转子,通过轴承旋转设置于所述机罩内,所述转子一端端部沿设置方向向外延伸形成蜗杆,所述转子另一端嵌入有磁钢,控制板,固定于所述机罩尾端,所述控制板上设置有磁感应器,所述磁感应器感应所述磁钢位置,引线模组,包括与所述定子电连接的受电引线,与所述控制板电连接的拓展引线,所述控制板通过拓展引线与外界计算机电连接,防爆模组,包括断电机构以及封装外壳,所述封装外壳设置于所述机罩外部,所述断电机构固定于所述封装外壳上。本发明设计有蜗杆,能适应多种不同类型的控制器使用；采用电控加物理断电的方式来及时制止爆燃的发生。(The invention relates to the technical field of brushless motors, in particular to a permanent magnet direct current brushless motor, which comprises: the aircraft bonnet, the stator is fixed in the aircraft bonnet, the rotor through the bearing rotation set up in the aircraft bonnet, rotor one end tip outwards extends along setting up the direction and forms the worm, the embedding of the rotor other end has the magnet steel, the control panel, is fixed in the aircraft bonnet tail end, be provided with the magnetic inductor on the control panel, the magnetic inductor response the magnet steel position, lead wire module include with the electrified lead wire that the stator electricity is connected, with the expansion lead wire that the control panel electricity is connected, the control panel is connected with external computer electricity through expanding the lead wire, explosion-proof module, including outage mechanism and encapsulation shell, the encapsulation shell set up in the aircraft bonnet is outside, outage mechanism is fixed in on the encapsulation shell. The invention is provided with the worm, and can adapt to various controllers of different types; the explosion is stopped in time by adopting an electric control and physical power-off mode.)

1. Permanent magnet brushless DC motor, its characterized in that includes:

the cover of the engine is provided with a hood,

a stator fixed in the housing,

the rotor is rotationally arranged in the hood through a bearing, one end part of the rotor extends outwards along the arrangement direction to form a worm, the other end of the rotor is embedded with magnetic steel,

a control panel fixed at the tail end of the hood, a magnetic inductor arranged on the control panel, the magnetic inductor inducing the position of the magnetic steel,

the lead module comprises a power receiving lead electrically connected with the stator and an expansion lead electrically connected with the control panel, the control panel is electrically connected with an external computer through the expansion lead,

the explosion-proof module comprises a power-off mechanism and a packaging shell, wherein the packaging shell is arranged outside the hood, and the power-off mechanism is fixed on the packaging shell.

2. The permanent magnet brushless DC motor according to claim 1, wherein the housing comprises a cast aluminum housing and an end cap, the end cap is fixed on one side of the cast aluminum housing, a stator cavity for accommodating the stator is formed in the cast aluminum housing, a bearing seat is arranged on one side of the end cap, a rotor is rotatably arranged in the bearing seat,

The circumferential side of the end cover extends outwards to form a support lug, a parallel bolt is arranged through the support lug,

the other side of the end cover is provided with a mounting seat, and the control panel is arranged on the mounting seat.

3. The permanent magnet brushless dc motor of claim 1, wherein a temperature control device is further disposed in the housing, and the temperature control device is electrically connected to an external computer through the housing.

4. The permanent magnet brushless dc motor of claim 2, wherein the side wall of the package housing defines a mounting channel, and the package housing is mounted on the plug pin through the mounting channel.

5. The permanent magnet brushless dc motor of claim 1, wherein the power cutoff mechanism comprises:

a shell, which is arranged on the packaging shell and is provided with a through hole allowing the power receiving lead to pass through,

a power-off knife group arranged around the power receiving lead,

and the locking mechanism is arranged in the shell and controls the opening and closing of the power-off knife set.

6. The permanent magnet brushless dc motor of claim 5, wherein the power-off blade set comprises:

the movable knife is fixed on the inner wall of the shell through an elastic piece,

A fixed knife fixed on the inner wall of the shell corresponding to the inner wall of one side of the movable knife,

the cutting edges of the movable knife and the fixed knife are opposite and arranged on the periphery of the power receiving lead.

7. The permanent magnet brushless dc motor of claim 6, wherein the locking mechanism comprises:

a servo motor arranged on the inner wall of the shell at the same side as the moving blade, the servo motor is electrically connected with the control panel, a hook releasing part is fixed at the output end of the servo motor,

and the pull ring mechanism is arranged between the unhooking part and the movable knife, the servo motor rotates for a certain angle, and the pull ring mechanism is unhooked from the unhooking part.

8. The permanent magnet brushless dc motor of claim 7, wherein the pull ring mechanism comprises:

one end of the connecting piece is fixedly connected with the movable knife,

a loop element disposed between the delinking element and the connecting element.

9. The permanent magnet brushless dc motor of claim 8, wherein a fuse is further disposed between the ring and the connecting member, and the fuse is electrically connected to the power receiving lead.

Technical Field

The invention relates to the technical field of brushless motors, in particular to a permanent magnet brushless direct current motor.

Background

The brushless motor is a common power device at present, and is widely applied to various working conditions. The company has designed a permanent magnet brushless dc motor for a controller with a worm, but it has certain drawbacks. Because the worm extends outwards, the longer the worm, the larger the moment, the harder the load is to rotate, and even more likely the motor stops rotating under the charged working condition.

When the motor rotates, the motor generates electricity to generate a voltage opposite to the voltage applied to two ends of the motor, the voltage is also called a reverse electromotive force, and the voltage input by the power supply is a forward electromotive force. It is the presence of back emf that causes the actual potential difference between the back emf to be small and the current flowing through the armature to be small. On the contrary, when the motor stops rotating after being electrified, the reverse electromotive force is zero at the moment, the potential difference on the armature is basically the same as the voltage of two ends of the motor, so that the current is increased, excessive heat is accumulated on the armature, the lead is fused, and the motor is finally burnt.

The burning-out of the motor can cause certain economic loss on one hand, and on the other hand, if the controller is damaged due to the burning of the motor, more serious results can be caused. Therefore, there is a need for an explosion and flame proof permanent magnet motor.

Explosion-proof and flame-proof motors on the market are usually powered off in an electrically controlled manner to prevent explosion, but in the case of too high temperature, the electrically controlled manner often fails, and therefore, the explosion-proof and flame-proof manner is not completely reliable.

Disclosure of Invention

The invention aims to provide a permanent magnet brushless direct current motor which can effectively prevent explosion and fire and is provided with a physical power-off mode.

The specific technical scheme is as follows:

permanent magnet brushless DC motor, comprising:

the cover of the engine is provided with a hood,

a stator fixed in the housing,

the rotor is rotationally arranged in the hood through a bearing, one end part of the rotor extends outwards along the arrangement direction to form a worm, the other end of the rotor is embedded with magnetic steel,

a control panel fixed at the tail end of the hood, a magnetic inductor arranged on the control panel, the magnetic inductor inducing the position of the magnetic steel,

the lead module comprises a power receiving lead electrically connected with the stator and an expansion lead electrically connected with the control panel, the control panel is electrically connected with an external computer through the expansion lead,

the explosion-proof module comprises a power-off mechanism and a packaging shell, wherein the packaging shell is arranged outside the hood, and the power-off mechanism is fixed on the packaging shell.

Furthermore, the hood comprises a cast aluminum shell and an end cover, the end cover is fixed on one side of the cast aluminum shell, a stator cavity for accommodating the stator is arranged in the cast aluminum shell, a bearing seat is arranged on one side of the end cover, a rotor is rotationally arranged in the bearing seat,

the circumferential side of the end cover extends outwards to form a support lug, a parallel bolt is arranged through the support lug,

the other side of the end cover is provided with a mounting seat, and the control panel is arranged on the mounting seat.

Furthermore, a temperature control device is arranged in the hood and penetrates through the hood to be electrically connected with an external computer.

Furthermore, an installation channel is formed in the side wall of the packaging shell, and the packaging shell is installed on the plug pin through the installation channel.

Further, the power cutoff mechanism includes:

a shell, which is arranged on the packaging shell and is provided with a through hole allowing the power receiving lead to pass through,

a power-off knife group arranged around the power receiving lead,

and the locking mechanism is arranged in the shell and controls the opening and closing of the power-off knife set.

Further, the power-off knife group comprises:

the movable knife is fixed on the inner wall of the shell through an elastic piece,

A fixed knife fixed on the inner wall of the shell corresponding to the inner wall of one side of the movable knife,

the cutting edges of the movable knife and the fixed knife are opposite and arranged on the periphery of the power receiving lead.

Further, the locking mechanism includes:

a servo motor arranged on the inner wall of the shell at the same side as the moving blade, the servo motor is electrically connected with the control panel, a hook releasing part is fixed at the output end of the servo motor,

and the pull ring mechanism is arranged between the unhooking part and the movable knife, the servo motor rotates for a certain angle, and the pull ring mechanism is unhooked from the unhooking part.

Further, the tab mechanism includes:

one end of the connecting piece is fixedly connected with the movable knife,

a loop element disposed between the delinking element and the connecting element.

Furthermore, a fuse wire is further arranged between the ring piece and the connecting piece, and the fuse wire is electrically connected with the power receiving lead.

Compared with the traditional technical scheme, the technical scheme adopted by the invention has the advantages that:

1. the invention is designed with the worm and can adapt to various controllers of different types.

2. The invention adopts the mode of electric control and physical power failure to timely stop the detonation, wherein the electric control mode has the highest efficiency and the worst reliability, the physical power failure mode is divided into active power failure and passive power failure, the active power failure mode has the right efficiency but still has the reliability risk, the passive power failure mode has the higher reliability although the efficiency is lower, and can ensure that the power supply is cut off to a certain extent so as to prevent the detonation.

Drawings

The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.

FIG. 1 is a schematic structural view of the present invention without an explosion-proof membrane module;

FIG. 2 is a half-sectional view of FIG. 1;

FIG. 3 is a schematic structural diagram of an explosion-proof membrane module according to the present invention;

FIG. 4 is a power disconnect mechanism of the present invention;

FIG. 5 is a top view of the movable and stationary blades of the present invention in operation;

fig. 6 is a schematic view of the working principle of the loop element and the release element of the present invention.

1. The motor stator comprises a machine cover, 11 cast aluminum shells, 111 support lugs, 112 stator cavities, 113 bolts, 12 end covers, 121 bearing seats, 122 mounting seats;

2. a stator;

3. rotor, 31, magnetic steel, 32, protective sleeve;

4. control panel, 41. magnetic inductor;

5. a lead module, 51, a power receiving lead, 52, an expansion lead;

6. an explosion-proof membrane group, 7, a packaging shell and 71, a mounting channel; 8. the power-off mechanism comprises a power-off mechanism 81, a power-off knife set 811, a movable knife 812, a fixed knife 82, a locking mechanism 821, a servo motor 822, a unhooking element 823, a pull ring mechanism 823, an 823a connecting element 823b, an annular element 823c, a fuse wire 83 and a shell;

9. a temperature control device.

Detailed Description

In light of the foregoing, it is intended that the following description be read in connection with the accompanying drawings and that the appended claims be construed as broadly as possible and that various changes and modifications may be made therein without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

The specific structures of the housing 1, the stator 2, the rotor 3, the control board 4, the lead wire module 5 and the explosion-proof membrane module 6 and the connection relationship therebetween according to the present invention will be described in further detail with reference to the following drawings:

permanent magnet brushless DC motor, comprising: aircraft bonnet 1, stator 2 are fixed in the aircraft bonnet 1, rotor 3 through the bearing rotation set up in the aircraft bonnet 1, 3 one end tip of rotor outwards extends along setting up the direction and forms the worm, 3 other end embeddings of rotor have magnet steel 31, control panel 4 is fixed in 1 tail end of aircraft bonnet, be provided with magnetic inductor 41 on the control panel 4, the response of magnetic inductor 41 magnet steel 31 position, lead wire module 5 include with 2 electricity connection of stator receive lead 51, with the expansion lead wire 52 that 4 electricity of control panel are connected, control panel 4 is through expanding lead wire 52 and external computer electrical connection, explosion-proof module, including outage mechanism 8 and encapsulation shell 7, encapsulation shell 7 set up in the aircraft bonnet 1 is outside, outage mechanism 8 is fixed in on the encapsulation shell 7.

Referring to fig. 1 and 2, in the above-mentioned permanent magnet brushless dc motor, the end of the rotor 3 extends outward to form a worm, and the worm can drive various controllers to operate. In order to achieve better implementation effect, a protective sleeve 32 is sleeved outside the worm to prevent the worm from being damaged.

The hood 1 comprises a cast aluminum shell 11 and an end cover 12, wherein the end cover 12 is fixed on one side of the cast aluminum shell 11, a stator cavity 112 for accommodating the stator 2 is formed in the cast aluminum shell 11, a bearing seat 121 is arranged on one side of the end cover 12, a rotor 3 is arranged in the bearing seat 121 in a rotating mode, a support lug 111 is formed by extending the periphery of the end cover 12 outwards, the support lug 111 is penetrated by a parallel bolt 113, the other side of the end cover 12 is provided with a mounting seat 122, and the control panel 4 is arranged on the mounting seat 122.

Referring to fig. 1 and 2, the cast aluminum housing 11 is generally cylindrical, an end cover 12 is disposed on one side of the cast aluminum housing 11, and the end cover 12 and the cast aluminum housing 11 are integrally formed by casting, so that the cast aluminum housing has high structural strength and good heat dissipation performance. As shown in fig. 1, a stator cavity 112 is provided in the cast aluminum housing 11, and the stator 2 can be fitted in the stator cavity 112 to ensure the stability of the stator 2. In order to achieve a better using effect, heat conducting glue can be arranged between the stator 2 and the cast aluminum shell 11, so that the stator 2 can be conveniently and quickly cooled. The end cap 12 is provided at a middle portion thereof with a bearing housing 121, and a bearing is provided in the bearing housing 121, and the rotor 3 is rotated by the bearing housing 121. The end of the rotor 3 is provided with a magnetic steel 31, in this embodiment, the magnetic steel 31 is embedded inside the end of the rotor 3, the magnetic steel 31 corresponds to the magnetic inductor 41, and the magnetic inductor 41 can sense the position of the magnetic steel 31, thereby realizing the direction adjustment of the brushless motor.

In addition, a support lug 111 extends outwards from the periphery of the cast aluminum housing 11, and a hole is formed on the support lug 111, and a pin 113 is disposed through the hole. In a specific use, the pin 113 is threaded, and the hole of the lug 111 is also threaded, so that the pin 113 can be fixed in the hollow.

The tail of the cast aluminum housing 11 protrudes outward to form a mounting seat 122, and the control board 4 can be fixed on the mounting seat 122, in this embodiment, the control board 4 is fixed on the mounting seat 122 by screws.

The temperature control device 9 is further arranged in the hood 1, and the temperature control device 9 penetrates through the hood 1 to be electrically connected with an external computer.

Referring to fig. 1, the temperature control device 9 is provided in the housing 1, and more particularly, on the stator 2, and can monitor the temperature in the housing 1 in real time and transmit the temperature data to the computer. After the computer obtains the temperature data, the temperature data can be directly transmitted to the control panel 4 electrically connected with the computer, and a power-off judgment signal made based on the temperature data can be transmitted to the control panel 4, so that the electric control power-off operation is realized, and the deflagration is prevented.

The side wall of the package housing 7 is provided with a mounting channel 71, and the package housing 7 is mounted on the latch 113 through the mounting channel 71.

Referring to fig. 3, the package housing 7 is provided with a mounting channel 71, and the mounting channel 71 is disposed at a position corresponding to the hole of the support lug 111. Similarly, the mounting channel 71 is provided with threads that mate with threads on the pin 113. Specifically, after the mounting channel 71 is aligned with the hole of the support lug 111, the bolt 113 is screwed in by rotation, and the cast aluminum housing 11 and the package housing 7 are fixed to each other.

The power cutoff mechanism 8 includes: a housing 83, the housing 83 install in on the encapsulation shell 7, set up on the housing 83 and allow the through-hole that receives electric lead 51 and pass, outage knife tackle 81, set up in receive electric lead 51 week side, locking mechanical system 82, set up in the housing 83 and control the opening and shutting of outage knife tackle 81.

Referring to fig. 4, in the power cutoff mechanism 8, the housing 83 is welded to the outer surface of the package case 7, and a through hole is opened at the top thereof, through which the power receiving lead 51 can pass through the housing 83. The power-off knife set 81 is arranged in the shell 83, the position of the knife head of the power-off knife set is opposite to the power receiving lead 51, and after the locking mechanism 82 is unlocked, the power-off knife set 81 is quickly started and cuts off the power receiving lead 51, so that the power receiving lead is prevented from continuing conducting electricity and generating heat, and further detonation is caused.

Referring to fig. 4 and 5, the power cutoff knife group 81 includes: the movable blade 811 is fixed on the inner wall of the shell 83 through an elastic piece, the fixed blade 812 is fixed on the inner wall of the shell 83 corresponding to one side of the movable blade 811, and the cutting edges of the movable blade 811 and the fixed blade 812 are opposite and arranged on the periphery of the power receiving lead 51.

The movable blade 811 is fixed on the inner wall of the housing 83 by an elastic member, in this embodiment, the elastic member is a spring, and in the actual use process, a limiting device, such as a retractable sleeve (not shown in the figure), may be further added outside the spring, so that the spring does not swing left and right or up and down when moving. When the locking mechanism 82 locks the movable blade 811, the elastic member of the movable blade 811 is in a compressed state.

The fixed blade 812 is attached to the inner wall of the housing 83 on the side opposite to the movable blade 811, and the cutting edges of the movable blade 811 and the fixed blade 812 are both disposed opposite to each other on the peripheral side of the power receiving lead 51.

When the movable blade 811 is unlocked, the movable blade 811 moves toward the fixed blade 812 rapidly by the elastic force of the elastic member, and cuts the power receiving lead 51, thereby preventing the heat generation.

In one or more embodiments, the fixed blade 812 may not be provided, and the fixed blade 812 may be replaced with the same structure as the movable blade 811, thereby achieving the same effects as in the present embodiment.

The lock mechanism 82 includes: the servo motor 821 is arranged on the inner wall of the shell 83 on the same side with the movable knife 811, the servo motor 821 is electrically connected with the control panel 4, a disengaging piece 822 is fixed to the output end of the servo motor 821, a pull ring mechanism 823 is arranged between the disengaging piece 822 and the movable knife 811, the servo motor 821 rotates for a certain angle, and the pull ring mechanism 823 is disengaged from the disengaging piece 822.

The pull ring mechanism 823 includes: one end of the connecting piece 823a is fixedly connected with the movable knife 811, and the ring piece 823b is arranged between the disengaging piece 822 and the connecting piece 823 a.

Referring to fig. 6, in the above-described locking mechanism 82, the servo motor 821 is electrically connected to the control board 4, and the control board 4 may control the rotation angle of the servo motor 821. Referring to fig. 6, the releasing member 822 is a ring member having an opening at one end, and when the pull ring mechanism 823 is hooked on the releasing member 822, the servo motor 821 is rotated by a certain angle so that the ring member 823b of the pull ring member is released from the releasing member 822, thereby releasing the locking action of the movable blade 811.

A fuse 823c is further disposed between ring member 823b and connecting member 823a, and fuse 823c is electrically connected to power receiving lead 51.

If the temperature is too high and the control board 4 cannot properly adjust the servo motor 821, the explosion may be caused if the power is not immediately cut off, and therefore, the present invention further designs a fuse 823c, which is electrically connected to the power receiving lead 51, and when the temperature reaches a certain level or the current increases to a certain level, the fuse 823c is fused, so that the movable blade 811 cuts off the power receiving lead 51.

In summary, in the present invention, when the temperature is too high, the power-off procedure includes three stages:

1. when the temperature control device 9 is intact and the power receiving lead 51 can realize electric control power failure, the control panel 4 controls the power receiving lead 51 to be powered off;

2. in the case that the power receiving lead 51 is damaged and the power failure by the electric control cannot be realized, the control board 4 controls the power failure mechanism 8 to perform an active power failure action, i.e., actively cut off the power receiving lead 51, so that the loss is reduced to the minimum. Since the fuse 823c belongs to a consumable. The fuse 823c is replaced each time, which is troublesome in operation and causes waste.

3. When the power receiving lead 51 is damaged and the control board 4 is also damaged, the power cutoff mechanism 8 performs a passive and physical power cutoff operation, and the fuse 823c is completely blown to cut the power receiving lead 51, thereby preventing knocking.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.