Modularized complementary type primary double-fed brushless direct-current linear motor and motor module composed by same

Abstract

The invention discloses a modularized complementary type primary double-fed brushless direct-current linear motor and a motor module composed by same. The modularized complementary type primary double-fed brushless direct-current linear motor comprises a primary part and a secondary part, wherein the primary part comprises a rotor module, and the rotor module comprises a first module, a second module and a first non-magnetic-conducting material arranged between the first module and the second module; the first module and the second module respectively comprise two salient pole magnetic-conducting materials which are provided with m primary teeth; each primary tooth is provided with an concentrated armature winding, and a connection part of every two salient pole magnetic-conducting materials and the corresponding m primary teeth are respectively provided with a concentrated exciting winding; and m is the number of phases of the motor. When being used as a driving motor, the modularized complementary type primary double-fed brushless direct-current linear motor is particularly suitable for application occasions of linear motors with long stator structures, such as urban railway transit linear motors and electromagnetic catapults or application occasions needing a wide speed regulation range. The modularized complementary type primary double-fed brushless direct-current linear motor disclosed by the invention can also be used as a power generator and used for occasions of seawave power generation and the like and can achieve the characteristics of variable-speed constant-voltage output and constant-speed variable-voltage output through regulating the magnitude of exciting current.

Description

Technical field [0001] The invention relates to a brushless DC linear motor, in particular to a modular complementary primary double-fed brushless DC linear motor and a motor module composed of the same, belonging to the technical field of linear motor manufacturing. Background technique [0002] With the development of industry, linear motors have been widely used. The use of linear motor drive can eliminate the traditional mechanical gear that converts rotary motion into linear motion, thereby reducing system cost, reducing noise, reducing system volume, and reducing maintenance costs. Especially in rail transit applications, when a rotating motor is used for driving, the driving force is generated by the adhesion between the wheels and the rails. Problems such as wheel-rail slippage will occur when the speed is too high and deceleration. Therefore, the technical means of using linear motors instead of rotating motors can overcome the above shortcomings of rotating motors in t...

AI Technical Summary

Problems solved by technology

However, the speed regulation performance of the linear induction motor is not good. Although the frequency conversion technology such as vector control is adopted, the control is complicated, and the speed regulation performance is still not comparable to that of the DC motor.

[0004] The permanent magnet synchronous linear motor has the advantages of high power density and high efficiency, but because its armature winding and permanent magnet are installed on the mover and stator respectively, in long stator applications such as rail transit, whether the armature winding or the permanent magnet is installed along the Track laying will cause excessive system cost, inconvenient maintenance and other disadvantages

Moreover, permanent magnets are rare materials, expensive, and their performance is sensitive to factors such as ambient temperature and mechanical vibration. There are many shortcomings in the application of rail transit applications.

The important thing is that the magnetic field of the motor is excited by the permanent magnet, which is not easy to control, and the field weakening control technology must be used to increase the system cost and complexity

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