Brushless motor used for electric bicycle

A technology for electric bicycles and brushless motors, which is applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve problems such as affecting performance, reduced service life, large vibration, etc., so as to reduce mechanical noise and vibration. , the effect of reducing vibration and weight

Active Publication Date: 2015-04-01
TAIZHOU JINYU ELECTROMECHANICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Brushless motors usually use permanent magnet rotors, but the interaction between the permanent magnet rotor and the rotating electromagnetic field will generate large vibrations, and will be directly transmitted off the rotor shaft, which may cause severe mechanical vibrations, thus affecting its performance. also lead to reduced service life

Method used

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  • Brushless motor used for electric bicycle
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The high-strength aluminum alloy material contains 0.65wt% Mn, 1.50wt% Si, 1.2wt% Ni, 1.5wt% Mg, 0.65wt% Zn, 0.15wt% Ti, 0.15wt% Fe , 0.12wt% Cu, the balance being Al and unavoidable impurities. The preparation process includes the following steps: (1) Ingot casting: the melting temperature is 750°C, and the ingot is poured after melting for 35 minutes; (2) Homogenization annealing of the ingot: from room temperature to 350°C at a heating rate of 30°C / h, holding 3 hours, then raised to 520°C at a rate of 30°C / h, and held for 8 hours, and then air-cooled; (3) Thermal deformation during thermal processing: thermal processing on thermal processing equipment to ensure that the final temperature of the alloy thermal processing is not low at 350°C; (4) heat treatment: after holding at 490°C for 1.5 hours, quenching, and then aging at 180°C for 5 hours.

Embodiment 2

[0020] The high-strength aluminum alloy material contains 0.85wt% Mn, 1.25wt% Si, 0.8wt% Ni, 1.8wt% Mg, 0.75wt% Zn, 0.12wt% Ti, 0.18wt% Fe , 0.12wt% Cu, 0.02wt% Cr, the balance being Al and unavoidable impurities. The preparation process includes the following steps: (1) Ingot casting: the melting temperature is 750°C, and the ingot is poured after melting for 35 minutes; (2) Homogenization annealing of the ingot: from room temperature to 350°C at a heating rate of 30°C / h, holding 3 hours, then raised to 520°C at a rate of 30°C / h, and held for 8 hours, and then air-cooled; (3) Thermal deformation during thermal processing: thermal processing on thermal processing equipment to ensure that the final temperature of the alloy thermal processing is not low at 350°C; (4) heat treatment: after holding at 490°C for 1.5 hours, quenching, and then aging at 180°C for 5 hours.

Embodiment 3

[0022] The high-strength aluminum alloy material contains 0.75wt% Mn, 1.50wt% Si, 1.0wt% Ni, 1.6wt% Mg, 0.65wt% Zn, 0.13wt% Ti, 0.08wt% Fe , 0.05wt% Cu, the balance being Al and unavoidable impurities. The preparation process includes the following steps: (1) Ingot casting: the melting temperature is 750°C, and the ingot is poured after melting for 35 minutes; (2) Homogenization annealing of the ingot: from room temperature to 350°C at a heating rate of 30°C / h, holding 3 hours, then raised to 520°C at a rate of 30°C / h, and held for 8 hours, and then air-cooled; (3) Thermal deformation during thermal processing: thermal processing on thermal processing equipment to ensure that the final temperature of the alloy thermal processing is not low at 350°C; (4) heat treatment: after holding at 490°C for 1.5 hours, quenching, and then aging at 180°C for 5 hours.

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Abstract

The invention relates to a brushless motor used for an electric bicycle. The brushless motor comprises a stator and a rotor, wherein the stator is provided with an annular stator core, a coil and a stator tooth, the rotor is arranged on the inner circumference of the stator and comprises an annular base made of damping materials, the center of the base is provided with a fixing hole for fixing a rotary shaft, a non-magnetic rotor shaft is installed in the fixing hole, the base made of the damping materials is provided with an annular radiating alloy base body, and the base body is provided with anisotropic annular sintered permanent magnets. According to the brushless motor, the weight of the motor can be obviously reduced, vibration, transmitted from the permanent magnets to the rotor shaft, of a rotating magnetic field can be obviously reduced, and accordingly mechanical noise of the motor and a load can be obviously lowered, vibration of the motor and the load can be obviously reduced, and the life expectancy of the motor is prolonged. The brushless motor is applied to the electric bicycle, vibration of the electric bicycle in running can be obviously reduced, and the sitting comfort and the grade of the electric bicycle can be improved.

Description

technical field [0001] The invention belongs to the technical field of electric bicycle accessories, and more specifically, the invention relates to a brushless motor for an electric bicycle. Background technique [0002] An electric bicycle refers to a mechatronic personal vehicle that uses a battery as an auxiliary energy source and installs a motor, a controller, a battery, and a display instrument on the basis of an ordinary bicycle. With the massive consumption of non-renewable resources such as oil, the energy crisis and environmental pollution are increasingly becoming real threats. Electric bicycles, as representatives of low-carbon, low-consumption and green travel tools, have become popular among the people in many cities and villages. The mainstream means of transportation for short-distance travel. [0003] One of the most important accessories in an electric bicycle is the motor. It can be said that the motor of an electric bicycle basically determines the perf...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): H02K1/22C22C21/08C22F1/047
Inventor王加许
OwnerTAIZHOU JINYU ELECTROMECHANICAL