阅读说明：本技术 一种适用于风机类及恒转矩负载的自起动永磁电动机 (Self-starting permanent magnet motor suitable for fans and constant torque loads ) 是由 王荣火 王臻炜 于 2020-06-14 设计创作，主要内容包括：本发明公开了一种适用于风机类及恒转矩负载的自起动永磁电动机,其特征结构包括一圆形转子铁芯、转子轴、铁氧体磁钢以及自启动鼠笼铝导条,所述圆形转子铁芯上均匀开设有多个鼠笼槽,每个鼠笼槽内均由铸铝工艺形成鼠笼铝导条。本发明涉及电动机技术领域,该适用于风机类及恒转矩负载的自起动永磁电动机,永磁材料使用铁氧体,而不是常用的稀土永磁材料,大大降低了磁钢成本,属于低成本永磁电动机,一定程度上为国家减少了稀土战略物资消耗；成本与IE1标准异步电动机相比,成本略有增加,但效率指标可以达到IE4标准,在低成本下实现高能效标准；与异步电动机相比,有稍高的功率因数,效率上有显著提升；自起动性能优于永磁同步电动机。(The invention discloses a self-starting permanent magnet motor suitable for fans and constant torque loads, which is characterized by comprising a circular rotor core, a rotor shaft, ferrite magnetic steel and a self-starting squirrel cage aluminum conducting bar, wherein a plurality of squirrel cage grooves are uniformly formed in the circular rotor core, and the squirrel cage aluminum conducting bar is formed in each squirrel cage groove by an aluminum casting process. The invention relates to the technical field of motors, in particular to a self-starting permanent magnet motor suitable for fans and constant torque loads, wherein a permanent magnet material uses ferrite instead of a common rare earth permanent magnet material, so that the cost of magnetic steel is greatly reduced, the self-starting permanent magnet motor belongs to a low-cost permanent magnet motor, and the consumption of rare earth strategic materials is reduced for the country to a certain extent; compared with an IE1 standard asynchronous motor, the cost is slightly increased, but the efficiency index can reach the IE4 standard, and the high energy efficiency standard is realized at low cost; compared with an asynchronous motor, the motor has a slightly higher power factor and obviously improved efficiency; the self-starting performance is superior to that of a permanent magnet synchronous motor.)

1. The utility model provides a self-starting permanent magnet motor suitable for fan class and constant torque load which the characteristic structure lies in: the squirrel-cage aluminum guide bar structure comprises a circular rotor core (1), a rotor shaft (2), ferrite magnetic steel (3) and a self-starting squirrel-cage aluminum guide bar (5), wherein a plurality of squirrel-cage grooves (4) are uniformly formed in the circular rotor core (1), and the squirrel-cage aluminum guide bar (5) is formed in each squirrel-cage groove (4) by an aluminum casting process;

the rotor shaft (2) is located at the axis of the circular rotor iron core (1).

2. The self-starting permanent magnet motor adapted for use with blowers and constant torque loads as recited in claim 1, wherein: the number of the ferrite magnetic steels (3) is four to eight, every two groups of the ferrite magnetic steels (3) form a group, and the ferrite magnetic steels (3) can be distributed in the circular rotor core (1) or on the surface of the circular rotor core.

3. The self-starting permanent magnet motor adapted for use with blowers and constant torque loads as recited in claim 1, wherein: air magnetism isolating grooves (6) can be opened on the circular rotor core (1), and the air magnetism isolating grooves (6) are arranged on two sides of the ferrite magnetic steel (3).

4. The self-starting permanent magnet motor adapted for use with blowers and constant torque loads as recited in claim 1, wherein: the number of the self-starting squirrel cage aluminum guide bars (5) is 20-40.

Technical Field

The invention relates to the technical field of motors, in particular to a self-starting permanent magnet motor suitable for fans and constant-torque loads.

Background

In the current market, the number of motors applied to fans and constant torque loads which do not conform to the national energy efficiency policy is tens of millions, the amount of electric energy wasted due to the efficiency of asynchronous motors every year is huge, the estimation cannot be carried out, and the value of the asynchronous motors newly applied to application occasions such as fans, pumps and conveyor belts every year is not lower than billion RMB.

At present, under the application occasions of fans, pumps, conveyor belts and the like, the load types are generally fans and constant-torque loads, almost all used motors are asynchronous motors, the defect of low efficiency exists, and the efficiency index can only reach the energy efficiency standard IE1 specified by the state; if a high-efficiency asynchronous motor is used, the efficiency index can reach the standard IE2 or IE3, but the cost, the volume and the weight of the motor are greatly increased; if one wants to meet the standard of IE4, its cost will become prohibitive.

On the other hand, there is also a solution for improving efficiency by replacing the asynchronous motor with a conventional permanent magnet synchronous motor, but there is the disadvantage that its cost is higher than that of the IE2 standard asynchronous motor, even higher than that of the IE3 standard asynchronous motor.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a self-starting permanent magnet motor suitable for fans and constant torque loads, and solves the problems of low efficiency and high cost of an efficient motor of the conventional asynchronous motor.

(II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a self-starting permanent magnet motor suitable for fans and constant-torque loads is characterized by comprising a circular rotor core, a rotor shaft, ferrite magnetic steel and self-starting squirrel cage aluminum guide bars, wherein a plurality of squirrel cage grooves are uniformly formed in the circular rotor core, the squirrel cage aluminum guide bars are formed in each squirrel cage groove through an aluminum casting process, and the end parts of all the aluminum guide bars are connected through a short circuit ring to form a self-starting squirrel cage. The rotor shaft is located at the axis of the circular rotor core.

Preferably, the number of the ferrite magnetic steels may be four, six or eight, and the ferrite magnetic steels may be distributed inside or on the surface of the circular rotor core.

Preferably, an air magnetic isolation groove can be formed in the circular rotor core and arranged on two sides of the ferrite magnetic steel.

(III) advantageous effects

The invention provides a self-starting permanent magnet motor suitable for fans and constant torque loads. The method has the following beneficial effects:

according to the self-starting permanent magnet motor suitable for fans and constant torque loads, the permanent magnet material is ferrite instead of a common rare earth permanent magnet material, so that the cost of magnetic steel is greatly reduced, the motor belongs to a low-cost permanent magnet motor, and the consumption of rare earth strategic materials is reduced for the country to a certain extent; compared with an IE1 standard asynchronous motor, the cost is slightly increased, but the efficiency index can reach the IE4 standard, and the high energy efficiency standard is realized at low cost; compared with an asynchronous motor, the motor has a slightly higher power factor and obviously improved efficiency; the self-starting performance is superior to that of a permanent magnet synchronous motor and is similar to that of an asynchronous motor; the asynchronous motor can be directly replaced in the use occasions of 60W-30kW fans, pumps, conveyor belts and the like.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;

FIG. 3 is a comparison table I of material costs involved in the present invention;

fig. 4 is a material cost comparison table two according to the present invention.

In the figure: 1. a circular rotor core; 2. a rotor shaft; 3. ferrite magnetic steel; 4. a squirrel cage groove; 5. self-starting squirrel cage aluminum conducting bars; 6. air magnetism isolating groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.