CN108512319B

CN108512319B - Switch reluctance motor

Info

Publication number: CN108512319B
Application number: CN201810375416.XA
Authority: CN
Inventors: 刘林; 易恭才
Original assignee: Dongguan Lihui Motor Co ltd
Current assignee: Dongguan Lihui Motor Co ltd
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2023-12-12
Anticipated expiration: 2038-04-24
Also published as: CN108512319A

Abstract

The invention discloses a switch reluctance motor, which is characterized in that a cooling fan blade, a stator chip, a rotor chip, a position disc and a stator coil frame are sequentially arranged in an inner cavity formed between a front bracket and a rear bracket in a penetrating manner, wherein the inner cavity is formed between a motor shaft and a bearing in a connecting manner. The stator chip includes a stator base and a plurality of stator salient poles protruding from the stator base toward a center of the stator; the rotor chip is provided with a plurality of rotor salient poles protruding outwardly from the rotor chip in a radial direction. Through optimal design to do benefit to the stability that reaches the motor low rotational speed, the noise is little when high-speed rotation, and efficiency reaches more than 80%. The stator is eight-stage and four-phase; the rotor is designed into six, special groove-shaped structural design, and the width proportion of tooth grooves is reasonably designed, so that the area of a stator chip groove is increased as much as possible while the motor performance is achieved, more enamelled wires are contained, and the temperature of the motor is reduced.

Description

Switch reluctance motor

Technical Field

The invention relates to the technical field of motors, in particular to a switched reluctance motor.

Background

The switch reluctance motor is a novel speed regulating motor, and the speed regulating system has the advantages of a direct current speed regulating system and an alternating current speed regulating system, and is a latest generation stepless speed regulating system of a relay frequency conversion speed regulating system and a brushless direct current motor speed regulating system. The speed regulating device has the advantages of simple and firm structure, wide speed regulating range, excellent speed regulating performance, higher efficiency in the whole speed regulating range and high system reliability. The device mainly comprises a switch reluctance motor, a power converter, a controller and a position detector. The controller includes a power inverter and control circuitry, and the rotor position detector is mounted at one end of the motor.

Because the switch reluctance motor does not need rare earth permanent magnet materials, the cost is low, and especially the price of the rare earth permanent magnet materials rises faster in recent years. The stability of the high rotating speed of the motor is low, and the noise is high. The speed regulation range is small, the installation is inconvenient, and the motor stability is low. The area and the structure of the stator chip slot in the past cannot accommodate too many enameled wires, which is not beneficial to reducing the temperature of the motor.

Accordingly, there is a need to provide a switched reluctance motor that overcomes the deficiencies of the prior art.

Disclosure of Invention

In order to achieve the purpose, the invention provides the switch reluctance motor which has the advantages of reliable structure, large starting moment, wide speed regulation range and greatly improved motor stability.

The technical scheme adopted by the invention is as follows: the utility model provides a switch reluctance motor, includes fore-stock, cooling fan blade, stator chip, rotor chip, position dish, stator bobbin and the back support that motor shaft, bearing connect gradually, cooling fan blade stator chip rotor chip position dish with stator bobbin wears to establish in proper order the motor shaft the setting that the bearing connects gradually is in the fore-stock with in the inner chamber that forms between the back support. The stator chip includes a stator base and a plurality of stator salient poles protruding from the stator base toward a center of the stator; the rotor chip is provided with a plurality of rotor salient poles, and the plurality of rotor salient poles protrude outward from the rotor chip in a radial direction.

Further, the number of the stator protrusions is eight, and the number of the rotor protrusions is 6.

Further, the outer part of the motor shaft is cylindrical, the output end is arranged into a square structure, and the ratio of the side length of the square structure to the diameter of the cylindrical shape is 0.6-0.8.

Further, the stator wire frame comprises a stator wire feeding frame and a stator wire discharging frame, an inner spigot is arranged at the bottom of the wire feeding frame, an outer spigot is arranged at the top of the wire discharging frame, the wire feeding frame and the wire discharging frame are connected into a whole through the matching of the inner spigot and the outer spigot, an upper winding table is arranged on the wire feeding frame, an n-shaped groove is formed in the inner side of the upper winding table, and a lower winding table and a u-shaped groove which are matched are formed in the lower wire discharging frame; the outer circle convex edge of the upper wire frame is provided with a bridging wire supporting boss, and a lacquer leather wire protection groove is arranged between two adjacent supporting bosses.

Further, the front support border is provided with a plurality of location boss, the border of back support also corresponds to be provided with positioning groove.

Further, the blades of the cooling fan blade are arrayed around the central shaft of the fan blade seat in an equal circumference manner, and an air port is formed between every two adjacent blades.

The beneficial effects of the invention are as follows: aiming at the switch reluctance motor developed by high-grade household appliances, the stability of the low rotating speed of the motor is facilitated, the noise is low during high-speed rotation, and the efficiency can reach more than 80%. The stator is eight-stage and is designed into four phases; the rotor is designed into six, special groove-shaped structural design, and the width proportion of tooth grooves is reasonably designed, so that the area of a stator chip groove is increased as much as possible while the motor performance is achieved, more enamelled wires are contained, and the temperature of the motor is reduced.

Drawings

FIG. 1 is an exploded view of a switched reluctance motor;

FIG. 2 is a cross-sectional view of a stator chip;

FIG. 3 is a cross-sectional view of a rotor chip;

FIG. 4 is a block diagram of a stator bobbin;

FIG. 5 is a block diagram of a stator lower bobbin;

fig. 6 is a structural view of a motor shaft.

Detailed Description

In order to make the technical scheme and technical effects of the invention more clear, the invention is further described below with reference to specific embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

The switch reluctance motor has large electric starting moment and wide speed regulating range, can be made into a flattened structure, and is particularly popularized to a certain extent on high-grade household appliances, electric bicycles and automobiles.

As shown in fig. 1, a switched reluctance motor comprises a motor shaft, a front bracket 1, a cooling fan blade 2, a stator upper wire frame 9, a stator chip 4, a rotor chip 5, a position disc 8, a stator lower wire frame 3 and a rear bracket 10 which are sequentially connected with a bearing. The cooling fan blade 2, the stator upper wire frame 9, the stator chip 4, the rotor chip 5, the position disc 8 and the stator lower wire frame 3 are sequentially arranged in the motor shaft 7, the bearing 5 and the inner cavity formed between the front bracket 1 and the rear bracket 10 in a penetrating manner.

As shown in fig. 2, the stator core 4 includes a stator base 41 and a plurality of stator salient poles 42 protruding from the stator base 41 toward the center of the stator. Further, the number of the stator salient poles 42 is eight, the four phases are designed, the special groove-shaped structure is designed, the width proportion of the tooth slot is reasonably designed, so that the area of the stator chip slot is increased as much as possible while the motor performance is achieved, more enamelled wires are contained, and the temperature of the motor is reduced. The width of one stator salient pole 42 is between 10.85mm and 10.95 mm; preferably, the width of the stator salient poles 42 is 10.9mm. The spacing between the two opposite grooves on the inner part of the base 41 is 98.3mm to 99.3 mm; preferably 98.8mm. The edge of the stator is evenly provided with circular holes 43 having a diameter of between 6.95mm and 7.05mm, preferably 7.00mm.

As shown in fig. 3, the rotor chip 5 is provided with a plurality of rotor salient poles 51, and the plurality of rotor salient poles 51 protrude outward from the rotor chip in the radial direction. The number of rotor salient poles 51 is 6. The rotor salient poles 51 have a width of between 12.57mm and 12.9 mm; preferably, the rotor salient poles 51 have a width of 12.6mm. The width of the end of the rotor salient pole 51 is slightly larger than the rotor salient pole body and is 13.57mm to 13.9mm; preferably 13.6mm. The center of the rotor chip 5 is also provided with a circular hole 52. The rotor chip 5 is designed into 6 rotor salient poles 51, and the air gap is designed into 0.3mm so as to be beneficial to achieving high rotating speed of 0.3mm, so as to be beneficial to achieving stable high-speed transportation and low noise.

Further, as shown in fig. 6, the outer portion of the motor shaft 7 is cylindrical, and the output end is provided with a square structure 71, and the ratio of the side length of the square structure 71 to the diameter of the cylindrical shape is 0.6-0.8.

As shown in fig. 4 and 5, further, the stator bobbin includes a stator upper bobbin 9 and a stator lower bobbin 3, an inner spigot 91 is provided at the bottom of the upper bobbin 9, an outer spigot 31 is provided at the top of the lower bobbin 3, the upper bobbin and the lower bobbin are integrally connected by matching the inner spigot and the outer spigot, an upper winding table 92 is provided on the upper bobbin, an n-shaped groove 93 is provided at the inner side of the upper winding table, and a lower winding table 32 and a u-shaped groove 33 are provided on the lower bobbin 3; the outer circular convex edge 94 of the upper wire frame is provided with a bridging wire supporting boss 95, and a enameled wire protecting groove 96 is arranged between two adjacent supporting bosses 95. Preventing the lacquer leather line from loosening and preventing the occurrence of electric leakage caused by the contact of the bracket.

Further, a plurality of positioning bosses are arranged on the edge of the front support 1, positioning grooves are correspondingly arranged on the edge of the rear support 10, and the front support 1 and the rear support 10 are screwed by screws 11.

Further, the blades of the cooling fan blade 2 are arranged around the central shaft of the fan blade seat in an equal circumference manner, and air openings are formed between adjacent blades. The cooling fan blade can reduce the temperature of the motor and prolong the service life of the motor.

The switch reluctance motor has the advantages of reliable structure, large starting moment, wide speed regulation range, convenient and reliable installation and greatly improved motor stability. A direct-drive motor developed for high-grade household appliances with 350-500W is a switched reluctance motor, the rated input power of the motor is 350-500W through the optimal design, the efficiency can reach more than 80%, and the diameter of the motor is 130MM; an adjustment range of 50-15000RPM can be realized, and the maximum torque can reach 2.2N.M. So as to be beneficial to achieving the stability of low rotating speed of the motor, and the noise is small when rotating at high speed. The stator is eight-stage and is designed into four phases; the rotor is designed into six, special groove-shaped structural design, and the width proportion of tooth grooves is reasonably designed, so that the area of a stator chip groove is increased as much as possible while the motor performance is achieved, more enamelled wires are contained, and the temperature of the motor is reduced.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. For those skilled in the art, the architecture of the invention can be flexible and changeable without departing from the concept of the invention, and serial products can be derived. But a few simple derivatives or substitutions should be construed as falling within the scope of the invention as defined by the appended claims.

Claims

1. The switched reluctance motor comprises a motor shaft, a front bracket, a cooling fan blade, a stator chip, a rotor chip, a position disc, a stator coil frame and a rear bracket which are sequentially connected with each other, wherein the cooling fan blade, the stator chip, the rotor chip, the position disc and the stator coil frame are sequentially arranged in an inner cavity formed between the front bracket and the rear bracket in a penetrating way, and the motor shaft and the bearing are sequentially connected with each other; wherein the stator chip includes a stator base and a plurality of stator salient poles protruding from the stator base toward a center of the stator; the rotor chip is provided with a plurality of rotor salient poles, and the plurality of rotor salient poles protrude outward from the rotor chip in a radial direction;

wherein, the number of the stator protrusions is eight, and the number of the rotor protrusions is 6;

wherein, the blades of cooling fan blade are arranged around the circumference such as fan blade seat center pin, form the wind gap between the adjacent blade.

2. The switched reluctance motor according to claim 1, wherein the outer portion of the motor shaft is cylindrical, and the output end is provided in a square structure, and a ratio of a side length of the square structure to a diameter of the cylindrical is 0.6-0.8.

3. The switched reluctance motor according to claim 1, wherein the stator bobbin comprises a stator upper bobbin and a stator lower bobbin, an inner spigot is arranged at the bottom of the upper bobbin, an outer spigot is arranged at the top of the lower bobbin, the upper bobbin and the lower bobbin are integrally connected through the cooperation of the inner spigot and the outer spigot, an upper winding table is arranged on the upper bobbin, an n-shaped groove is arranged on the inner side of the upper winding table, and a lower winding table and a u-shaped groove which are matched are arranged on the lower bobbin; the outer circle convex edge of the upper wire frame is provided with a bridging wire supporting boss, and a lacquer leather wire protection groove is arranged between two adjacent supporting bosses.

4. The switched reluctance motor according to claim 1, wherein the front bracket edge is provided with a plurality of positioning bosses, and the rear bracket edge is correspondingly provided with positioning grooves.