CN210629276U

CN210629276U - A permanent magnet motor with built-in frequency converter

Info

Publication number: CN210629276U
Application number: CN201922069409.XU
Authority: CN
Inventors: 伊建华; 施旭鑫
Original assignee: Zhejiang Hansheng Motor Technology Co ltd
Current assignee: Zhejiang Hansheng Motor Technology Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-05-26
Anticipated expiration: 2029-11-26

Abstract

The utility model provides a permanent magnet motor with a built-in frequency converter, which belongs to the technical field of motors. It solves the problems that the existing motor inverter occupies a large space outside and affects the installation of the motor. The utility model comprises a stator, a rotor, a rotor shaft and a casing. The two ends of the casing are respectively provided with a front end cover and a rear end cover, and an outer side of the rear end cover is also fixed with a wind cover, and a centrifugal fan and a heat sink are arranged in the wind cover. The heat sink is located between the rear end cover and the centrifugal fan. The heat sink body is provided with a frequency converter element. One end of the rotor shaft passes through the rear end cover and the heat sink in turn and is connected to the centrifugal fan. The heat sink body is also provided with a first heat sink. A second heat sink is arranged on the outer periphery of the casing, an air inlet is arranged on the air cover, and an air outlet is arranged on the rear end cover, and the air outlet is located outside the casing and faces the second heat sink. The utility model has the advantages that the frequency converter element is built-in, and the occupied space is small.

Description

Permanent magnet motor with built-in frequency converter

Technical Field

The utility model belongs to the technical field of the motor, concretely relates to built-in permanent-magnet machine of converter.

Background

The existing permanent magnet motor frequency converter is arranged on the outer portion of a motor shell, so that the height of the motor is increased, the space required by motor installation is enlarged, the appearance of the motor is irregular, and the installation of the motor is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned defect of the external existence of current permanent-magnet machine converter, and the permanent-magnet machine who provides with converter component built-in, occupation space is little.

The purpose of the utility model can be realized by the following technical proposal:

a permanent magnet motor with a built-in frequency converter comprises a stator, a rotor shaft and a casing, wherein the stator and the rotor are arranged in the casing, a winding is arranged on the stator, a plurality of permanent magnets are arranged on the rotor, the rotor and the rotor shaft are relatively fixed, a front end cover and a rear end cover are respectively arranged at two ends of the casing, the rotor shaft is rotatably arranged on the front end cover and the rear end cover, a fan cover is further fixed at the outer side of the rear end cover, a centrifugal fan and a heat radiation body are arranged in the fan cover, the heat radiation body is positioned between the rear end cover and the centrifugal fan, the heat radiation body is fixedly connected with the rear end cover, a frequency converter element electrically connected with the winding is arranged in the heat radiation body, one end of the rotor shaft extends out of the front end cover, the other end of the rotor shaft sequentially penetrates through the rear end cover, the fan housing is provided with an air inlet, the rear end cover is provided with an air outlet, and the air outlet is located outside the casing and faces the second radiating fins. The frequency converter element is arranged in the fan cover, so that the motor has better integrity, occupies small space and is convenient to install; when the motor works, the centrifugal fan is driven to rotate, and the centrifugal fan rotates to enable air to flow in the fan cover, so that heat dissipation is performed on the heat dissipation body, and the influence of overhigh temperature in the heat dissipation body on the normal work of a frequency converter element is prevented; the air outlet is towards the second fin, dispels the heat to the casing, guarantees that the motor normally works, improves motor life.

In the above-mentioned permanent magnet motor with a built-in frequency converter, the heat sink includes an annular portion and a side plate portion, the annular portion is annular and has two sides through, the annular portion is fixed on the rear end cover, the side plate portion is fixed on the side of the annular portion facing the centrifugal fan and covers the side of the annular portion, the first cooling fins are sequentially arranged along the periphery of the annular portion at intervals, and the first cooling fins extend along the axial direction of the rotor shaft. The side plate portion is provided on the side of the annular portion facing the fan, and prevents dust in the air flow drawn in from the air inlet from entering the heat sink.

In the above-described permanent magnet motor with a built-in inverter, the annular portion is provided concentrically with the rotor shaft.

In the permanent magnet motor with the built-in frequency converter, one side of the fan housing is detachably and fixedly connected with the rear end cover, the air inlet is formed in the other side of the fan housing, and the center of the air inlet is close to the axis of the centrifugal fan.

In the permanent magnet motor with the built-in frequency converter, the frequency converter element is fixed in the heat radiator through epoxy resin glue.

In the permanent magnet motor with the built-in frequency converter, the fan housing and the rotor shaft are arranged concentrically, and the peripheries of the first cooling fins and the centrifugal fan are both close to the inner wall of the fan housing. The air current is blown off along centrifugal fan radial direction by centrifugal fan axial admission centrifugal fan then, because the centrifugal fan periphery is close to the fan housing inner wall, through blockking of fan housing inner wall, the air current can be close to fan housing inner wall lateral flow, and first fin is close to the fan housing inner wall, therefore most air current all can blow to first fin, and the heat of first fin is taken away to furthest, and the radiating effect is good.

In the above permanent magnet motor with a built-in frequency converter, the air outlet is close to the first heat sink. The air outlet is close to the first radiating fin, and can take away heat in time.

In the permanent magnet motor with the built-in frequency converter, the plurality of first radiating fins are uniformly arranged along the periphery of the annular part at intervals, and two ends of each first radiating fin are respectively flush with two sides of the annular part. The radiating fins cover the width direction of the whole annular part, and absorb heat to the maximum extent for radiation.

In the permanent magnet motor with the built-in frequency converter, the heat sink and the first heat sink are both made of aluminum.

In the permanent magnet motor with the built-in frequency converter, the exterior of the casing is further provided with a control panel, and the control panel is electrically connected with the frequency converter element through a wire.

In the permanent magnet motor with the built-in frequency converter, the second cooling fins axially extend along the rotor shaft, and the second cooling fins are arranged at intervals along the periphery of the casing.

Compared with the prior art, the utility model has the advantages that the frequency converter element is arranged in the motor and integrated with the motor, thereby saving space and facilitating the installation of the motor; the frequency converter element is arranged in the heat radiation body, and the centrifugal fan radiates the heat of the heat radiation body and the motor shell at the same time, so that the normal work of the frequency converter element and the motor is ensured.

Drawings

Fig. 1 is a sectional view of the present invention.

In the figure, 1, a stator; 2. a rotor; 3. a housing; 4. a front end cover; 5. a rear end cap; 6. a fan housing; 7. a centrifugal fan; 8. an annular portion; 9. a side plate portion; 10. connecting columns; 11. a frequency converter element; 12. a first heat sink; 13. a second heat sink 14, a control panel; 15. a rotor shaft.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, the utility model provides a pair of built-in permanent-magnet machine of converter, including stator 1, rotor 2, rotor shaft 15 and casing 3, stator 1, rotor 2 sets up in casing 3, stator 1 fixes on casing 3, be equipped with the winding on stator 1, rotor 2 is formed by a plurality of rotors 2 with the concentric stack of punching, be equipped with a plurality of permanent magnets on rotor 2, rotor shaft 15 wears to establish on rotor 2 and through key and keyway relatively fixed with it, both ends are equipped with front end housing 4 and rear end housing 5 respectively about casing 3, front end housing 4 and rear end housing 5 all can be dismantled with casing 3 and link firmly, front end housing 4 and rear end housing 5 are worn out respectively at rotor shaft 15 both ends, rotor shaft 15 passes through the bearing rotation and sets up on front end housing 4 and rear end housing 5.

Rear end cap 5 right side is equipped with a fan housing 6, and fan housing 6 left side and rear end cap 5 paste and can dismantle through fasteners such as screws and fix on rear end cap 5, and the inner chamber of fan housing 6 is cylindricly and sets up with rotor shaft 15 is concentric, still is equipped with a radiator and a centrifugal fan 7 in the fan housing 6, and the radiator is located between rear end cap 5 and the centrifugal fan 7, and rotor shaft 15 one end links to each other with centrifugal fan 7 after passing the radiator, and centrifugal fan 7 passes through rotor shaft 15 and drives the rotation.

The heat radiation body comprises an annular part 8 and a side plate part 9, the annular part 8 is annular and has two through sides, the annular part 8 and a rotor shaft 15 are concentrically arranged, a plurality of connecting columns 10 are arranged on the rear end cover 5, screw holes are concentrically formed in the connecting columns 10, the left side of the annular part 8 leans against the connecting columns and is spaced from the rear end cover 5 by a certain distance, connecting holes which are in one-to-one correspondence with the connecting columns 10 are also formed in the annular part 8, bolts penetrate through the connecting holes and are in threaded connection with the screw holes in the connecting columns 10, and therefore the annular part 8 and the rear end cover 5 are fixed; the side plate part 9 is fixedly arranged at the right side of the annular part 8, the side plate part 9 covers the side of the annular part 8, a frequency converter element 11 electrically connected with the winding is arranged in the heat radiation body, and the frequency converter element 11 is fixed in the heat radiation body through epoxy resin glue sealing and filling.

Be equipped with a plurality of first fin 12 on the periphery of annular portion 8, first fin 12 extends along rotor shaft 15 axial, and a plurality of first fin 12 evenly set up along annular portion 8 periphery interval, and the both ends of first fin 12 flush with the both sides of annular portion 8 respectively. The heat sink and the first heat sink 12 are made of aluminum.

The first cooling fins 12 and the periphery of the centrifugal fan 7 are both close to the inner wall of the fan housing 6.

An air inlet is formed in the right side of the fan cover 6, the center of the air inlet is close to the axis of the centrifugal fan 7, an air outlet is formed in the rear end cover 5, and the air outlet is located outside the shell 3 and close to the first radiating fins 12;

still be equipped with a plurality of second fin 13 on the casing 3 periphery, second fin 13 extends along 15 axial of rotor shaft, and a plurality of second fin 13 set up along casing 3 periphery interval, and the air outlet is towards second fin 13.

A control panel 14 is further fixed on the exterior of the housing 3, and the control panel 14 is electrically connected with the frequency converter element 11 through a wire.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended manner, i.e. in a manner equivalent to "including at least … …", and not in a closed manner, i.e. in a manner not to be interpreted as "including … … only".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A permanent magnet motor with built-in frequency converter, comprising a stator (1), a rotor (2), a rotor shaft (15) and a casing (3), the stator (1) and the rotor (2) being arranged on the casing (3) ), the stator (1) is provided with windings, the rotor (2) is provided with a number of permanent magnets, the rotor (2) is relatively fixed with the rotor shaft (15), and the two ends of the casing (3) are respectively provided with front ends The cover (4) and the rear end cover (5), the rotor shaft (15) is rotatably arranged on the front end cover (4) and the rear end cover (5). The air hood (6) is provided with a centrifugal fan (7) and a cooling body, the cooling body is located between the rear end cover (5) and the centrifugal fan (7), and the cooling body is connected to the rear end cover (5). ) is fixedly connected, the heat sink is provided with a frequency converter element (11) electrically connected with the above-mentioned windings, one end of the above-mentioned rotor shaft (15) protrudes from the front end cover (4), and the other end passes through the rear end cover (5) in turn to dissipate heat. The rear body is connected to the centrifugal fan (7), a plurality of first cooling fins (12) are arranged on the periphery of the radiator body, and a plurality of second cooling fins (13) are arranged on the outer periphery of the above-mentioned casing (3). 6) An air inlet is provided on the rear end cover (5), and an air outlet is provided on the rear end cover (5), and the air outlet is located outside the above-mentioned casing (3) and faces the second heat sink (13).

2 . The permanent magnet motor with built-in frequency converter according to claim 1 , wherein the heat sink comprises an annular portion ( 8 ) and a side plate portion ( 9 ), and the annular portion ( 8 ) is in the shape of a circle. 3 . The annular part (8) is fixed on the rear end cover (5), the side plate part (9) is fixed on the side of the annular part (8) facing the centrifugal fan (7) and The side plate portion (9) covers the side of the annular portion (8), the first cooling fins (12) are arranged at intervals along the outer circumference of the annular portion (8), and the first cooling fins (12) are arranged along the rotor shaft (15). ) extends axially.

3 . The permanent magnet motor with built-in frequency converter according to claim 2 , wherein the annular portion ( 8 ) is arranged concentrically with the rotor shaft ( 15 ). 4 .

4. The permanent magnet motor with built-in frequency converter according to claim 1, 2 or 3, characterized in that, one side of the wind cover (6) is detachably connected to the rear end cover (5), and the above The air inlet is arranged on the other side of the hood (6), and the center of the air inlet is close to the axis of the centrifugal fan (7).

5 . The permanent magnet motor with built-in frequency converter according to claim 1 , wherein the frequency converter element ( 11 ) is fixed in the heat sink by epoxy resin glue sealing. 6 .

6 . The permanent magnet motor with built-in frequency converter according to claim 4 , wherein the hood ( 6 ) and the rotor shaft ( 15 ) are arranged concentrically, and the first heat sink ( 12 ) is connected to the centrifugal The outer circumference of the fan (7) is all close to the inner wall of the windshield (6).

7 . The permanent magnet motor with built-in frequency converter according to claim 6 , wherein the air outlet is close to the first heat sink ( 12 ). 8 .

8. The permanent magnet motor with built-in frequency converter according to claim 2 or 3, characterized in that, a plurality of first heat sinks (12) are evenly spaced along the outer circumference of the annular portion (8), and the first heat sinks ( Both ends of 12) are flush with both sides of the annular portion (8).

9 . The permanent magnet motor with built-in frequency converter according to claim 1 , wherein the heat sink and the first heat sink ( 12 ) are made of aluminum. 10 .

10. The permanent magnet motor with built-in frequency converter according to claim 1, 2 or 3, wherein a control panel (14) is further provided outside the casing (3), and the control panel (14) passes through the The wires are electrically connected with the above-mentioned inverter element (11).