Brushless direct excitation motor and assembling method thereof

A technology of casing and excitation coil, which is applied to motors, electromechanical devices, electric vehicles, etc., can solve the problems of complex structure, large volume of indirect excitation motors, and difficulty in precise control of the speed of asynchronous motors.

Pending Publication Date: 2021-05-28
卜中山
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of these three types of motors is high reliability, but there are also many disadvantages: the speed of asynchronous motors is difficult to control accurately, permanent magnet motors are not resistant to high temperature and vibration, and indirect excitation motors have complex structures and large volumes

Method used

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  • Brushless direct excitation motor and assembling method thereof
  • Brushless direct excitation motor and assembling method thereof
  • Brushless direct excitation motor and assembling method thereof

Examples

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Effect test

Embodiment Construction

[0018] When the brushless direct excitation motor is used as an electric vehicle hub motor, the specific examples are as follows: the inner diameter of the stator is 300 mm, and three-phase distributed winding is used; the number of claw pole pairs of the rotor magnetic pole is 6 pairs, and the claw poles at both ends of the magnetic pole are staggered by 30°; The maximum excitation current is 10A; the motor adopts a fully enclosed aluminum alloy casing, and uses water cooling to absorb the heat generated by the stator winding and the excitation winding, and the temperature of the motor is controlled within 90°C. The total weight of the motor is about 38Kg, the continuous torque is 500NM, the maximum torque is 800NM, the continuous power is 50KW, the maximum speed is 12000R / min, and the durability time exceeds 30,000 hours (converted to 1.8 million kilometers), and its performance exceeds the world's advanced level.

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Abstract

The invention relates to a brushless synchronous motor which is resistant to high temperature and vibration, high in reliability and good in durability. The brushless direct excitation motor is composed of a rotor, a stator, an inner stator, a casing and the like. The rotor is formed by sleeving a magnetic pole on a rotating shaft, claw poles at two ends of the magnetic pole are opposite, and the end parts of the claw poles are spaced by a distance L in the axial direction. The stator is composed of a stator core and a stator winding. The stator core is composed of a stator ring and stator teeth, and air gaps exist between the stator teeth and the claw poles. The inner stator is composed of an inner stator support and a magnet exciting coil and located in a surrounding structure formed by the magnetic core of the magnetic pole and the claw poles. The inner stator support is fixed on the stator through the gap L between the claw poles, and excitation current is directly introduced by a lead through the gap L between the claw poles. The motor is high in reliability, good in durability, small in size, light in weight, high in efficiency and suitable for being used as an electric automobile hub driver and an automobile alternating-current generator.

Description

technical field [0001] The invention relates to a brushless motor, in particular to a brushless synchronous motor which directly introduces excitation current without carbon brushes and slip rings and an assembly method thereof. [0002] technical background [0003] The existing brushless motor technology is divided into three types: asynchronous motors, permanent magnet motors and indirect excitation synchronous motors; indirect excitation synchronous motors include brushless generators with rotating exciters and brushless generators using open transformer excitation. The advantage of these three types of motors is high reliability, but there are also many disadvantages: the speed of asynchronous motors is difficult to control accurately, permanent magnet motors are not resistant to high temperature and vibration, and indirect excitation motors have complex structures and large volumes. Contents of the invention [0004] The purpose of the present invention is to provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/24H02K1/14H02K1/16H02K3/46H02K29/00
CPCH02K1/243H02K1/146H02K1/165H02K3/46H02K29/00H02K2201/03H02K2213/03Y02T10/64
Inventor 卜中山
Owner 卜中山
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