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Motor parameter improvement method for electric tricycle

A technology for electric tricycles and motor parameters, applied in the direction of electrical components, electromechanical devices, magnetic circuit rotating parts, etc., can solve the problems of large eddy current loss, low motor torque output, high current, etc., to increase service life, reduce operating current, Effect of reducing eddy current loss

Inactive Publication Date: 2016-12-07
XUZHOU HONGRUNDA ELECTRIC VEHICLE
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AI Technical Summary

Problems solved by technology

[0002] At present, the 120-type 12-slot 8-pole brushless DC motor that is widely used in electric tricycles in the market is rated at 500W, 650W, and 800W. The common no-load speed is 3300rpm / min to 3400rpm / min. There is a large electromagnetic noise during the operation of the motor, which also makes the motor torque output low and increases the wind resistance of the electric tricycle. In addition, the thickness of the stator and rotor silicon steel sheets is 0.5±0.01mm, and there is a large eddy current loss. The above two Disadvantages cause the current to be high during the operation of the motor, reduce the operating efficiency of the motor, and shorten the battery life of the electric vehicle

Method used

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Embodiment Construction

[0010] The present invention will be further described below.

[0011] There is wind resistance in the driving process of an electric tricycle, and the greater the speed of its travel, the greater the wind resistance it receives. The greater the wind resistance, the motor needs to output a greater torque, which increases the operating current of the motor. There is a motor constant CA in the design of the brushless DC motor, which reflects the inverse relationship between the length of the armature and the no-load speed of the motor, and the effective length of the armature is approximately equal to the length of the stator and rotor. The stator and rotor lengths set by the present invention are increased from the original 30mm, 35mm, and 40mm to 32mm, 37mm, and 42mm respectively for the stator and rotor lengths of rated 500W, 650W, and 800W motors. In the case of changing the wire diameter of the motor winding, the no-load speed of each rated model motor is reduced by about 1...

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PUM

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Abstract

The invention discloses a motor parameter improvement method for an electric tricycle. The method comprises the following steps of: adjusting the thicknesses of silicon steel sheets, and adjusting the height of a motor stator. The height of the stator is increased, so that the operation speed of a motor is effectively reduced; the operation current of the motor is correspondingly reduced; therefore, the service life of the motor is prolonged; the thicknesses of the silicon steel sheets of the stator and a rotor are reduced, so that eddy-current loss of a stator iron core can be reduced; and the operation current is reduced, so that the cruising capability of the motor is effectively improved.

Description

technical field [0001] The invention relates to a motor for an electric tricycle, in particular to the parameter improvement of the motor. Background technique [0002] At present, the 120-type 12-slot 8-pole brushless DC motor that is widely used in electric tricycles in the market is rated at 500W, 650W, and 800W. The common no-load speed is 3300rpm / min to 3400rpm / min. There is a large electromagnetic noise during the operation of the motor, which also makes the motor torque output low and increases the wind resistance of the electric tricycle. In addition, the thickness of the stator and rotor silicon steel sheets is 0.5±0.01mm, and there is a large eddy current loss. The above two The shortcoming causes the current to be high during the operation of the motor, which reduces the operating efficiency of the motor and shortens the battery life of the electric vehicle. Contents of the invention [0003] Purpose of the invention: Aiming at the shortcomings of the 120-type ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/12H02K1/22
CPCH02K1/12H02K1/22H02K2213/03
Inventor 赵世维
Owner XUZHOU HONGRUNDA ELECTRIC VEHICLE
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