KR200359518Y1 - Permanent Magnetic Motor - Google Patents

Abstract

The present invention relates to a permanent magnet motor, comprising: a rotor having a rotating shaft, a rotor core provided to be spaced apart from an outer circumference of the rotating shaft, and a plurality of permanent magnets interposed between the rotating shaft and the rotor core; Fixing means provided to fix the permanent magnet; First and second bearing assemblies provided for bearing bearing both ends of the rotor; A frame; A stator having a stator core provided on an inner wall of the frame so as to be spaced apart from the rotor, and a stator coil mounted to the stator core; A fan provided on the rotating shaft located at one side of the frame; A fan cover coupled to one side of the frame to protect the fan therein; And a plurality of encoders, each embedded in an encoder bracket coupled with the fan cover to control the stator coil and the fan, respectively, so that a plurality of permanent magnets are interposed between the rotating shaft and the rotor core to provide overall control of the motor. The size can be reduced, and the permanent magnet can be easily provided to the rotating shaft and the rotor core, so that the productivity is high and the heat concentrated on the bearing assembly supporting the rotating shaft at high speed of the permanent magnet motor can be rapidly oiled. Cooling has the effect of improving the efficiency of the overall permanent magnet motor.

Description

Permanent Magnetic Motor

The present invention relates to a permanent magnet motor, and more particularly, it is possible to easily attach a plurality of permanent magnets to the rotor, a permanent magnet motor that can cool the heat concentrated on the rotating shaft by providing an oil line during high speed rotation It is about.

A motor is a device that converts electrical energy into kinetic energy, for example, rotational kinetic energy. The motor is classified into an AC or DC motor according to the type of energy. The motor is a general motor using an electromagnet and a permanent magnet motor using a permanent magnet. It is largely divided.

In general, permanent magnet motors are actively used in semiconductors, chemicals, and textile machinery requiring strong torque because they have good signal response and high-capacity designs.

Here, the efficiency of the permanent magnet motor is determined by the uniform magnetic field of the permanent magnet and good cooling. Therefore, the permanent magnet motor is required to be configured to mount a plurality of permanent magnets on the outer or inner circumference of the rotor firmly and easily, and to be able to quickly dissipate heat generated during high speed rotation.

The technique disclosed in Korean Utility Model Registration No. 0119572 (see FIGS. 1 to 3) is a technique for attaching a permanent magnet to a rotor, and is applied to a plurality of permanent magnets 4 fixed to the outer periphery of the rotor core 1. A fixing groove 4a is formed, and the fixing groove 4a is inserted into and fixed with a crisscross (+) type permanent magnet fixing pin 5, and a rotating shaft 2 fixed to the center of the rotor core 1 is provided. After pressing the permanent magnet fixing plate 6 formed with a plurality of fixing holes (6a) through the fixing hole (6a) to fix the fixing member (7) to the permanent magnet fixing pin (5) of the rotor core (1) It is configured to fix a plurality of permanent magnets 4 on the outer periphery. Here, reference numerals "3" and "9" are "key" and "stator".

This prior art can firmly fix a plurality of permanent magnets 4 on the outer periphery of the rotor core 1 and maintain a constant void between the stator 9 and the permanent magnet 4 when the rotor core 1 rotates. It is possible to obtain an effect such that the efficiency of the motor can be improved by maintaining the same, and generating an equal magnetic field. However, the above-described prior art presses the permanent magnet 4 in the longitudinal direction on the permanent magnet fixing plate 6 and secures it using the fixing member 7, so that the precise productivity of the pressing and fixing work has to be performed repeatedly. There is a low problem.

The technique disclosed in Korean Patent Laid-Open Publication No. 1997-0055013 (see FIGS. 4 and 5) relates to cooling of a permanent magnet motor, and a refrigerant inlet 26a in which a refrigerant channel 25 is supplied with a refrigerant Re in a center thereof. A shaft (23) formed at the left and right sides thereof to supply the refrigerant (Re) to cool the stator (10) and the rotor (21) so as to cool the stator (10) and the rotor (21); And a housing 30 having a refrigerant outlet 26b connected to the chamber 30a so that the refrigerant Re is discharged outwardly.

In addition, the above-described permanent magnet synchronous motor has a spiral groove 22 formed on the outer circumference of the rotor 21 so as to serve as a passage of the refrigerant Re, and the spiral groove 22 has a rotor 21 laminated plate. When formed by the lamination of the welding seam characterized in that formed inclined.

Therefore, since the stator and the rotor are cooled by the coolant supplied through the shaft, the cooling effect is excellently improved, so that the miniaturization and manufacture of the product can be easily performed, as well as the potato of the magnets can be effectively removed so that the efficiency of the product and It is comprised so that reliability may improve remarkably.

However, the above-described technique has a serious problem of improving the cooling efficiency during the high speed rotation of the rotor, while the rotor of the hollow structure is eccentrically rotated to generate vibrations, thereby lowering the durability of the overall motor.

An object of the present invention devised to solve the above problems is to provide a permanent magnet motor that can easily mount the permanent magnet on the main surface of the rotor.

Another object of the present invention is to provide a permanent magnet motor capable of realizing strong cooling power by providing a cooling oil line on a bearing portion of a rotating shaft where heat is concentrated at high speed.

An object of the present invention is a rotor having a rotating shaft, a rotor core provided to be spaced apart from the outer periphery of the rotating shaft, and a plurality of permanent magnets interposed between the rotating shaft and the rotor core; Fixing means provided to fix the permanent magnet; First and second bearing assemblies provided for bearing bearing both ends of the rotor; A frame; A stator having a stator core provided on an inner wall of the frame so as to be spaced apart from the rotor, and a stator coil mounted to the stator core; A fan provided on the rotating shaft located at one side of the frame; A fan cover coupled to one side of the frame to protect the fan therein; It may be achieved by a permanent magnet motor configured to include a plurality of encoders, each embedded in an encoder bracket coupled with the fan cover to control the stator coil and the fan correspondingly.

Preferably, the fixing means of the present invention is provided at both ends of the rotor core in which the plurality of permanent magnets are embedded, including an end ring spaced apart from the rotating shaft, and an end plate coupled to both ends of the end ring. It is composed.

Preferably, the first bearing assembly of the present invention comprises a bearing provided on the outer periphery of the rotating shaft, a bearing plate for supporting the bearing, and a bearing bracket coupled with the fan cover, the bearing plate and the frame. do.

Preferably, the second bearing assembly of the present invention comprises a bearing provided on the outer periphery of the rotating shaft, a bearing cover having an o-ring and supporting the bearing, and a bearing bracket coupled to the frame and the bearing cover. It is configured to include.

More preferably, the present invention further includes an oil line provided to communicate each oil inlet formed in the fan cover with a corresponding bearing assembly.

1 is an exploded perspective view showing a permanent magnet fixing device of the motor according to an embodiment of the prior art.

2 is a longitudinal cross-sectional view of FIG.

3 is a cross-sectional view of FIG. 1.

Figure 4 is a cross-sectional view showing a cooling device of a permanent magnet motor according to another embodiment of the prior art.

5 is a front view illustrating the rotor of FIG. 4.

Figure 6 is a front view of a part of the permanent magnet motor according to the present invention.

7 is an enlarged cross-sectional view illustrating the rotor to which the permanent magnet of FIG. 6 is mounted.

8 and 9 are enlarged cross-sectional views of the bearing assembly of FIG.

<< Explanation of symbols for main part of drawing >>

101: nut

102: second bearing assembly 102a: bearing

102b: O-ring 102c: bearing cover

105: rotation axis

106: Bearing Bracket

107: fastening means 107a: end ring

107b: end plate

109 frame

110: permanent magnetic

111: rotor core

112: stator core 113: stator coils

114: first bearing assembly 114a: bearing

114b: Bearing Plate

116: fan

117: Bearing Bracket

118a, 118b: Oil Line

119: Fan Cover

120: encoder bracket

121, 122: Encoder

Hereinafter, the configuration of the present invention with reference to the drawings in detail.

6 is a front view showing a part of the permanent magnet motor according to the present invention, FIG. 7 is an enlarged cross-sectional view showing a rotor in which the permanent magnet of FIG. 6 is mounted, and FIGS. 8 and 9 show the bearing assembly of FIG. 6. It is an enlarged cross section.

6 to 9, the permanent magnet motor according to the present invention includes a plurality of permanent magnets 110 between the rotating shaft 105 and the rotor core 111 to the end ring 107a and the end plate 107b. It is easily attached by the configured fixing means 107, and has the structure which the oil line 118a, 118b communicated with the bearing assembly 114, 102 provided in the outer periphery of the both ends of the rotating shaft 105. As shown in FIG.

The rotor is interposed between the rotating shaft 105, the rotor core 111 of the hollow structure fixed to the center outer circumference of the rotating shaft 105, the outer circumference of the rotating shaft 105 and the inner surface of the rotor core 111 It is composed of a plurality of permanent magnets (110).

Here, the permanent magnet 110 is a ring shape or a segment (segment), in particular is provided in close contact with no space between the permanent magnet (110). In the case of the ring-shaped permanent magnet 110 is inserted between the outer periphery of the rotary shaft 105 and the rotor core 111, it is fixed by the fixing means 117 at a time, there is a feature that has good work productivity.

Here, reference numeral 101 denotes a "nut" coupled to one end of the rotation shaft 105.

The stator is mounted on the inner side of the frame 109 of the hollow structure and spaced apart from the rotor core 111 by a predetermined distance. Here, the stator is composed of a stator core 112 mounted on the inner wall of the frame 109 and a stator coil 113 wound on the stator core 112.

The bearing assemblies 114 and 102 are respectively provided at both ends of the rotating shaft 105 so as to prevent the shaft deformation during the high speed rotation of 8,500 rpm or more of the rotating shaft 105, and are coupled with the frame 109, respectively.

The first bearing assembly 114 is provided on the outer periphery of the rear end of the rotating shaft 105, and consists of a bearing 114a, a bearing plate 114b provided to hold the bearing 114a, and the first oil line 118a. ) Is in communication with. Here, the bearing plate 114b is coupled to the bearing bracket 117, the upper end of which is coupled to the frame 109.

The second bearing assembly 102 is provided at the front outer periphery of the rotating shaft 105, and is composed of a bearing 102a and a bearing cover 102c provided to hold the bearing 102a, and the bearing cover 102c includes: An o-ring 102b is provided and configured to communicate with the second oil line 118b to prevent leakage of oil. Here, the bearing cover 102c is coupled to the bearing bracket 106 in which the upper end is fastened to the frame 109.

In addition, the fan 116 is provided on the outer periphery of the rear end of the rotary shaft 105 in order to dissipate heat generated during high speed rotation of more than 8,500rpm of the permanent magnet motor, one end of the fan coupled to the first bearing bracket 115 It is built in the cover 119.

Here, the fan cover 119 is formed with oil inlets (no number) of the first and second oil lines, the other end is coupled to the encoder bracket 120.

The first and second encoders 122 and 121 are embedded in the encoder bracket 120 so as to control the stator coils 113 and the fan 119 corresponding to each other by optimizing the applied power.

The first and second oil lines 118a and 118b rapidly cool the bearing assemblies 114 and 102 where heat is concentrated during high speed rotation of the rotary shaft 105 to improve the cooling efficiency of the entire permanent magnet motor. The cooling oil provided from the outside is communicated to the corresponding bearing assemblies 114 and 102, respectively.

The first oil line 118a is configured to supply oil to the bearing plate 114b of the first bearing assembly 114 via the oil inlet (no number) formed in the fan cover 119 and the first bearing bracket 115. Oil piping is provided.

The second oil line 118b is a bearing cover 102c of the second bearing assembly 102 via an oil solenoid (no number) formed in the fan cover 119, the frame 109, and the second bearing bracket 106. Oil piping is provided to supply oil to the tank.

Although the present invention described above is limited to one embodiment, the present invention is not limited thereto, and the present invention may be easily modified by those of ordinary skill in the art. It is obvious that it belongs to the technical idea.

The present invention having the above configuration has the following advantages and effects.

First, the present invention can reduce the size of the overall motor is interposed between a plurality of permanent magnets and the rotor core.

Second, the present invention can easily provide a permanent magnet to the rotating shaft and the rotor core is good work productivity.

Third, the present invention can quickly cool the heat concentrated in the bearing assembly supporting the rotating shaft during the high speed rotation of the permanent magnet motor can improve the efficiency of the overall permanent magnet motor.

Claims (5)

A rotor having a rotating shaft, a rotor core provided to be spaced apart from an outer circumference of the rotating shaft, and a plurality of permanent magnets interposed between the rotating shaft and the rotor core; Fixing means provided to fix the permanent magnet; First and second bearing assemblies provided for bearing bearing both ends of the rotor; A frame; A stator having a stator core provided on an inner wall of the frame so as to be spaced apart from the rotor, and a stator coil mounted to the stator core; A fan provided on the rotating shaft located at one side of the frame; A fan cover coupled to one side of the frame to protect the fan therein; And a plurality of encoders each embedded in an encoder bracket coupled with the fan cover to respectively control the stator coil and the fan correspondingly. The method of claim 1, The fixing means, End rings provided at both ends of the rotor core in which the plurality of permanent magnets are embedded, and spaced apart from the rotating shaft; Permanent magnet motor comprising an end plate coupled to both ends of the end ring. The method of claim 1, The first bearing assembly, A bearing provided on an outer circumference of the rotating shaft, A bearing plate for supporting the bearing, Permanent magnet motor, characterized in that comprising a bearing bracket coupled to the fan cover, the bearing plate and the frame. The method of claim 1, The second bearing assembly, A bearing provided on an outer circumference of the rotating shaft, A bearing cover having an o-ring and supporting the bearing; Permanent magnet motor comprising a bearing bracket coupled to the frame and the bearing cover. The method according to any one of claims 1, 3 and 4, Permanent magnet motor, characterized in that it further comprises an oil line provided to communicate each of the oil inlet formed in the fan cover and the corresponding bearing assembly.