Linear traction motor of urban rail

Abstract

The invention discloses a linear traction motor of an urban rail. The traction motor is characterized in that high-temperature superconducting materials are laminated and wind around a coil skeleton (2) to form a plurality of runway type coils that are used as excitation windings (1) of a motor; the excitation windings (1) are fixed in a low-temperature container (3) connected with a secondary skeleton (4). Joints of the excitation windings (1) and a superconducting switch (8) are connected in parallel and then exciting currents are connected. On the basis of conversion of the superconducting switch (8) from a normal state to a superconducting state, a closed-loop constant current effect of the excitation windings (1) is realized. A copper three-phase symmetric primary winding (5) winds around a primary iron core (6); after connection of a three-phase symmetric alternating current by using a star-shaped or triangular connection method, a three-phase travelling wave magnetic field is generated at an air gap; and because of the action with strong magnetic fields generated by the high-temperature superconducting excitation windings (1), large-thrust operation of the linear motor is realized. According to the invention, the linear traction motor is applied to the urban rail traffic and the constraint of vehicle-mounted excitation source is broken. The linear traction motor has advantages of light weight, high thrust density and large work gap and the like.

Description

technical field [0001] The invention relates to rail vehicle equipment, in particular to a high-temperature superconducting linear traction motor for urban rail traction. Background technique [0002] The proportion of passenger traffic carried by urban rail transit in the entire urban public passenger transportation system is getting higher and higher. Therefore, in order to improve transportation efficiency and service level, it is necessary to optimize and improve on the basis of existing rail transit technology. Traditional urban rail transit, such as intercity trains and subways, uses catenary power supply, which is prone to poor contact and serious wear and tear during high-speed operation, which increases system maintenance costs. In addition, the power of the train is mainly driven by the wheel rail and ground rail Therefore, when running at high speed, the noise is large, and the wheel and rail are easy to slip, which affects the quality of passenger service and the...

AI Technical Summary

Problems solved by technology

Traditional urban rail transit, such as intercity trains and subways, uses catenary power supply, which is prone to poor contact and serious wear and tear during high-speed operation, which increases system maintenance costs. In addition, the power of the train is mainly driven by the wheels and rails Therefore, when running at high speed, the noise is large, and the wheel and rail are easy to slip, which affects the quality of passenger service and the safety of train operation. Moreover, the climbing ability of traditional trains is weak, and it is difficult to run on places with large slopes.

Images