Middle-low-speed normal conducting maglev vehicle motor stator winding multi-segment distribution structure

Abstract

The invention discloses a middle-low-speed normal conducting maglev vehicle motor stator winding multi-segment distribution structure. A large linear motor is used at a single side of each carriage of a maglev vehicle, a stator winding of each large linear motor is divided into N segments of the same length and distributed on corresponding N steering frames, the distance between each segment of motors is 1 / N of motor pole distance, two adjacent segments of motor windings are arranged differently, and the phase sequence of the next segment of motor winding is lagged 60 degrees than that of the front segment of motor winding, thereby making air gap magnetic fields between each segment of motors continuous. The middle-low-speed normal conducting maglev vehicle motor stator winding multi-segment distribution structure can obviously increase efficiency and power of the motors, creates conditions for designing high-speed maglev vehicles. The similar design principle can be applied to a driving method of a linear asynchronous motor of wheel track vehicles such as light rails or subways.

Description

technical field [0001] The invention relates to a constant conduction maglev mechanism, in particular to a linear asynchronous motor structure for a medium-low speed constant conduction maglev train. Background technique [0002] At present, my country has built two test lines for medium and low-speed constant conduction maglev trains. The design of the mechanical and electrical parts of the maglev train is basically modeled on the Japanese HSST maglev train scheme, that is, each maglev train is composed of three or five magnetic bogies. Composing the running part of the vehicle, each magnetic bogie has four DC suspension electromagnets and a stator of a linear asynchronous motor on both sides. The former generates the magnetic levitation force, and the latter generates the driving force for the vehicle to move forward, that is, the traction force. In order to pass through the line with small curvature radius, the length of the general magnetic bogie is about 3m, and the wid...

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Problems solved by technology

In addition, the factor that affects the efficiency of the motor is that the reactive magnetizing current of the motor is very large, and the power factor of the motor About 0.5, the power consumption of the motor winding is relatively large

The large reactive magnetizing current is due to the levitation air gap δ=8mm of the maglev train. In order to avoid the mechanical contact between the motor stator and the surface of the guide rail when the maglev train lands on the rail surface, a gap of 3mm is reserved, so the air gap of the motor often exceeds 11mm, which is The requirements for operational safety cannot be easily reduced

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