CN210468911U

CN210468911U - High-efficiency energy-saving switched reluctance motor

Info

Publication number: CN210468911U
Application number: CN201921379953.8U
Authority: CN
Inventors: 江林飞; 孙豪远; 汪旭亮
Original assignee: Zhejiang Yongchang Electric Corp
Current assignee: Zhejiang Yongchang Electric Corp
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-05-05
Anticipated expiration: 2029-08-23

Abstract

The utility model discloses an energy-efficient switched reluctance motor, including stator and rotor, the stator includes stator core, winding, the winding is distributed by a plurality of coil annular and is constituteed fractional slot and concentrate the winding structure, the coil is installed on stator core, the rotor includes pivot and rotor core, rotor core installs in the pivot, the last a plurality of rotor tooth that is equipped with of rotor core, be equipped with the dovetail between the adjacent rotor tooth.

Description

High-efficiency energy-saving switched reluctance motor

Technical Field

The utility model relates to a motor especially relates to an energy-efficient switched reluctance motor.

Background

The switched reluctance motor is a double-salient structure, and salient poles of a stator and a rotor of the switched reluctance motor are formed by laminating common silicon steel sheets. The rotor has neither winding nor permanent magnet, and concentrated winding is wound on the stator pole. The reluctance motor utilizes the principle of minimum reluctance, magnetic flux is always closed along a path with minimum reluctance, and the attractive force between teeth is utilized to pull the rotor to rotate. The switched reluctance motor is a novel speed regulating motor, the speed regulating system has the advantages of a direct current speed regulating system and an alternating current speed regulating system, and the switched reluctance motor is a latest generation stepless speed regulating system of a 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 switched reluctance motor has a large torque at a low speed, but has large low-speed vibration, large noise, low efficiency, poor energy feedback, and high manufacturing cost.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a solve the problem that switched reluctance motor vibration is big, the noise is big, conversion efficiency is low, provide an energy-efficient switched reluctance motor.

The utility model adopts the technical scheme as follows:

the utility model provides an energy-efficient switched reluctance motor, includes stator and rotor, the stator includes stator core, winding, the winding is distributed by a plurality of coil annular and is constituteed fraction groove and concentrate the winding structure, the coil is installed on stator core, the rotor includes pivot and rotor core, rotor core installs in the pivot, the last a plurality of rotor tooth that is equipped with of rotor core, be equipped with the dovetail between the adjacent rotor tooth. The combined stator core concentrated winding technology can improve the utilization rate of silicon steel sheet materials and obviously reduce the cost of motor core materials; the dovetail groove is designed on the rotor tooth part, so that the appearance plastic package is facilitated, the connection strength is increased, and a plastic package body is easy to fall off when the dovetail groove is not designed; the dovetail groove is designed to reduce wind resistance and wind noise of the rotor, the air gaps between the stator and the rotor are unequal, the waveform and the shape of a magnetic field of the motor can be changed, torque ripple during loading can be reduced, the speed of the motor is regulated more stably, the noise is lower, and the conversion efficiency is higher; the fractional-slot concentrated winding is adopted, and manual coil inserting of distributed windings can be replaced by automatic equipment, so that the manufacturing cost is reduced, and the production automation is improved.

Furthermore, a plurality of silicon steel sheets are laminated on the stator core to form a magnetic pole, and a plurality of T-shaped sheets are laminated on the end part of the magnetic pole to form an anti-falling structure. The anti-falling structure formed by the T-shaped sheets is beneficial to preventing the coil from falling off.

Furthermore, the rotor teeth are smooth in outer contour, and dovetail grooves are formed in two sides of each rotor tooth and between the rotor teeth. Except that each position of outer profile face of rotor tooth all is equipped with the dovetail, is favorable to rotor tooth and plastic envelope body's abundant contact, strengthens the plastic envelope effect.

Further, the fractional-slot concentrated winding structure is distributed equivalently, and the winding wire is in a 12-slot 8-pole structure. The distributed winding is provided with more slots, the structure is complicated, materials are wasted, and the fractional-slot concentrated winding structure can realize a structure with less slots and more poles, so that the electromagnetic torque is increased and the torque pulsation is reduced; the fractional slot concentrated winding technology utilizes the equivalent distribution effect of the fractional slot winding and the weakening effect on the counter potential of the tooth harmonic wave to achieve the effects of improving the potential waveform and the utilization rate of the winding, and solves the contradiction that the motor has lower rotating speed, more pole pairs and limited number of slots.

Further, the coil is formed by winding an aluminum wire. The metal aluminum used as the motor winding has the problems of difficult welding, easy oxidation of welding points and the like, and the application of aluminum wires to replace copper wires in the motor is severely limited. After the aluminum coil of the stator winding is wound, the cold pressing terminal is adopted for crimping when the aluminum wire of the stator winding is connected with the outside, and the heat shrink tube is adopted for sealing the crimping position after crimping, so that the aluminum wire is isolated from the air. Through adopting the terminal of colding pressing to carry out the crimping, adopt the pyrocondensation pipe to seal the crimping position after the crimping, with aluminium wire and air isolated, prevent the oxidation, solved aluminium wire welding property not good fundamentally, easily oxidation, scaling powder have great amazing scheduling problem to the human body for during the aluminium wire can replace the copper line to apply the motor well, reduced manufacturing cost by a wide margin, solved copper resource shortage problem, promoted the competitiveness of motor trade.

Further, energy-efficient switched reluctance motor still includes front end housing and rear end cap, the outside of rear end cap is equipped with the controller, the controller is installed on the aluminum hull, and the chip of controller is established in the inside of aluminum hull, the surface of aluminum hull is equipped with the fin, fin and aluminum hull integrated into one piece set up concentrated heat dissipation area with the position at the outside place of the corresponding aluminum hull of chip. The general controller is located the outside of motor, and this structure adopts motor and controller integral type, and the chip is with the aluminium hull heat dissipation and set up concentrated heat dissipation district, practices thrift the cost promptly and improves the radiating effect again.

The utility model discloses following beneficial effect has: the rotor teeth are provided with dovetail grooves, so that the wind resistance and wind noise of the rotor can be reduced by plastic package of the shape, the air gaps between the stator and the rotor are unequal, the waveform and the shape of a magnetic field of the motor can be changed, the torque ripple during load can be reduced, the speed regulation of the motor is more stable, the noise is less, and the conversion efficiency is higher; the combined stator punching sheet can improve the utilization rate of silicon steel sheet materials and obviously reduce the material cost of the motor iron core; the fractional-slot concentrated winding is adopted, and manual coil inserting of distributed windings can be replaced by automatic equipment, so that the manufacturing cost is reduced, and the production automation is improved; the structure of 'few grooves and multiple poles' can be realized, and the electromagnetic torque can be increased and the torque pulsation can be reduced.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a front view of the device with the front cover removed;

FIG. 3 is a plan view of a rotor structure;

FIG. 4 is a plan view of a stator structure;

FIG. 5 is a rear view of the present device;

FIG. 6 is a perspective view of the rotor after plastic encapsulation;

FIG. 7 is a perspective view of a rotor tooth structure;

fig. 8 is a perspective view of an aluminum case structure.

In the figure, 100 denotes a rotor, 110 denotes a rotor core, 120 denotes a rotor tooth, 130 denotes a dovetail groove, 140 denotes a plastic package, 150 denotes a rotating shaft, 200 denotes a stator, 220 denotes a winding, 230 denotes a stator core, 3 denotes a front cover, 4 denotes a rear cover, 500 denotes an aluminum case, 510 denotes a heat sink, and 520 denotes a controller.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Example (b): as shown in fig. 1 to 4, 6 and 7, a high-efficiency energy-saving switched reluctance motor includes a stator 200 and a rotor 100, where the stator 200 includes a stator core 230 and a winding 220, the winding 220 is a fractional slot concentrated winding structure formed by annularly distributing a plurality of coils, the coils are installed on the stator core 230, the rotor 100 includes a rotating shaft 150 and a rotor core 110, the rotor core 110 is installed on the rotating shaft 150, the rotor core 110 is provided with a plurality of rotor teeth 120, and dovetail grooves 130 are provided between adjacent rotor teeth.

The utilization rate of silicon steel sheets of the combined stator core concentrated winding technology is improved by more than 20 percent, and the material cost of the motor core is obviously reduced; the dovetail groove 130 is designed on the part 120 of the rotor tooth, so that the appearance plastic package is facilitated, the connection strength is increased, and a plastic package body is easy to fall off when the dovetail groove 130 is not designed; the dovetail groove 130 is designed to reduce wind resistance and wind noise of the rotor 100, and the air gaps between the stator 200 and the rotor 100 are unequal, so that the waveform and the shape of a magnetic field of the motor can be changed, torque ripple during load reduction is facilitated, the speed regulation of the motor is more stable, the noise is less, and the conversion efficiency is higher; the fractional-slot concentrated winding is adopted, and manual coil inserting of distributed windings can be replaced by automatic equipment, so that the manufacturing cost is reduced, and the production automation is improved.

The stator core 230 is formed by laminating a plurality of silicon steel sheets to form a magnetic pole, and the end of the magnetic pole is provided with an anti-falling structure formed by laminating a plurality of T-shaped sheets. The anti-falling structure formed by the T-shaped sheets is beneficial to preventing the coil from falling off.

Rotor teeth 120 have a smooth outer profile, and dovetail grooves 130 are formed on both sides of each rotor tooth 120 and between each rotor tooth 120. Except for the outer contour surface, each part of the rotor teeth 120 is provided with a dovetail groove, which is beneficial to full contact between the rotor teeth 120 and the plastic package body 140, and the plastic package effect is enhanced.

The fractional-slot concentrated winding structure is distributed equivalently, and the winding 220 is wound into a 12-slot 8-pole structure. The distributed winding is provided with more slots, the structure is complicated, materials are wasted, and the fractional-slot concentrated winding structure can realize a structure with less slots and more poles, so that the electromagnetic torque is increased and the torque pulsation is reduced; the fractional slot concentrated winding technology utilizes the equivalent distribution effect of the fractional slot winding and the weakening effect on the counter potential of the tooth harmonic wave to achieve the effects of improving the potential waveform and the utilization rate of the winding, and solves the contradiction that the motor has lower rotating speed, more pole pairs and limited number of slots.

The coil is formed by winding an aluminum wire. The metal aluminum used as the motor winding has the problems of difficult welding, easy oxidation of welding points and the like, and the application of aluminum wires to replace copper wires in the motor is severely limited. After the aluminum coil of the stator winding 220 is wound, the aluminum wire of the stator winding 220 is in compression joint with an external connection by adopting a cold pressing terminal, and after compression joint, a compression joint part is sealed by adopting a heat shrinkage pipe to isolate the aluminum wire from air. Through adopting the terminal of colding pressing to carry out the crimping, adopt the pyrocondensation pipe to seal the crimping position after the crimping, with aluminium wire and air isolated, prevent the oxidation, solved aluminium wire welding property not good fundamentally, easily oxidation, scaling powder have great amazing scheduling problem to the human body for during the aluminium wire can replace the copper line to apply the motor well, reduced manufacturing cost by a wide margin, solved copper resource shortage problem, promoted the competitiveness of motor trade.

As shown in fig. 1, 5 and 8, the energy-efficient switched reluctance motor further includes a front end cover 3 and a rear end cover 4, a controller 520 is disposed outside the rear end cover 4, the controller 520 is mounted on an aluminum casing 500 and integrated with the motor, a chip of the controller 520 is disposed inside the aluminum casing 500, a heat sink 510 is disposed on an outer surface of the aluminum casing 500, and a concentrated heat sink region is disposed at a position of the outside of the aluminum casing 500 corresponding to the chip. The general controller is located the outside of motor, and this structure adopts motor and controller integral type, and the chip is with the aluminium hull heat dissipation and set up concentrated heat dissipation district, practices thrift the cost promptly and improves the radiating effect again.

Due to the change of the stator and rotor structure, the winding process is more convenient and reliable, compared with the traditional internal winding type of a round stator, the production efficiency can be greatly improved, the winding process quality can be improved, the one-time qualification rate of stator winding is improved to 99.99% from the original 99.5%, and the electrical performance of the product meets the requirements of customers.

The utility model discloses carry out optimal design to motor structure, through optimizing stator skeleton, stator core depth of parallelism and rotor structure, the system efficiency of high-efficient motor for the drum type washing machine can reach more than 80%, and the rotational speed reaches 18000r/min, and the noise is less than or equal to 60 dB.

Claims

1. The utility model provides an energy-efficient switched reluctance motor, its characterized in that includes stator (200) and rotor (100), stator (200) include stator core (230), winding (220) are distributed to constitute fraction groove by a plurality of coil annular and concentrate the winding structure, the coil is installed on stator core (230), rotor (100) are including pivot (150) and rotor core (110), rotor core (110) are installed on pivot (150), be equipped with a plurality of rotor tooth (120) on rotor core (110), be equipped with dovetail (130) between the adjacent rotor tooth.

2. The energy-efficient switched reluctance motor as claimed in claim 1, wherein said stator core (230) is formed by laminating a plurality of silicon steel sheets and forming a magnetic pole, and the end of the magnetic pole is provided with a retaining structure formed by laminating a plurality of T-shaped sheets.

3. An energy-efficient switched reluctance motor according to claim 1, wherein the rotor teeth (120) have a smooth outer profile, and dovetail grooves (130) are formed on both sides of each rotor tooth (120) and between each rotor tooth (120).

4. An energy-efficient switched reluctance machine according to claim 2, wherein said fractional slot concentrated winding structure is equally distributed, and said winding (220) winding is a 12-slot 8-pole structure.

5. The high efficiency energy saving switched reluctance motor of claim 2, wherein the coil is wound by aluminum wire.

6. The energy-efficient switched reluctance motor according to claim 1, further comprising a front cover (3) and a rear cover (4), wherein a controller (520) is disposed outside the rear cover (4), the controller (520) is mounted on the aluminum casing (500), a chip of the controller (520) is disposed inside the aluminum casing (500), a heat sink (510) is disposed on an outer surface of the aluminum casing (500), the heat sink (510) and the aluminum casing (500) are integrally formed, and a concentrated heat dissipation area is disposed at a position of the outer portion of the aluminum casing (500) corresponding to the chip.