An Asymmetric Permanent Magnet Linear Motor Traction System for Urban Rail Transit
A technology of permanent magnet linear motor and urban rail transit, which is applied in the direction of AC motor control, motor, control system, etc. It can solve the problems of increasing the energy consumption of the permanent magnet linear motor traction system, threatening the safety of traction equipment, and being unsuitable, etc., to achieve Avoid the risk of traction equipment overcurrent, improve reliability and economy, and reduce the effect of equipment installation space
Active Publication Date: 2020-06-16
SOUTHEAST UNIV
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Problems solved by technology
However, the permanent magnet linear motor traction system using the vehicle control mode will have circulating currents under idling conditions. The occurrence of circulating currents not only increases the operating energy consumption of the permanent magnet linear motor traction system under idling conditions, but also seriously threatens traction. Safety of equipment (no secondary zone circulation will increase significantly)
Obviously, the frame control mode using parallel structure is also not suitable for the permanent magnet linear motor traction system
Method used
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[0018] The present invention will be further explained below in conjunction with the accompanying drawings.
[0019] like Figure 1~2 As shown, the urban rail transit asymmetric permanent magnet linear motor traction system provided in this embodiment includes three three-leg traction converters and four three-phase primary permanent magnet linear motors; the bridge arm 1 of the traction converter 1 Control the A1 phase of the primary permanent magnet linear motor 1; the bridge arm 2 of the traction converter 1 controls the C1 phase of the primary permanent magnet linear motor 1; the bridge arm 3 of the traction converter 1 controls the A2 phase of the primary permanent magnet linear motor 2 The bridge arm 4 of the traction converter 2 controls the C2 phase of the primary permanent magnet linear motor 2; the bridge arm 6 of the traction converter 2 controls the A3 phase of the primary permanent magnet linear motor 3; the bridge arm 7 of the traction converter 3 Control the C3...
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The invention discloses an asymmetric permanent magnet linear motor traction system for urban rail transit. The asymmetric permanent magnet linear motor traction system comprises a plurality of traction converters and a plurality of permanent magnet linear motors, wherein the total number of bridge arms included in all the traction converters is equal to one plus the double of the number of the permanent magnet linear motors; one bridge arm in one traction converter is a public bridge arm, and the public bridge arm controls the same phases of all the permanent magnet linear motors; the other bridge arms in the traction converters are independent bridge arms, and the independent bridge arms each respectively control one phase of all the permanent magnet linear motors. The asymmetric permanent magnet linear motor traction system for the urban rail transit is used to reduce equipment installation space, lighten the weight of equipment, and lower system maintenance cost and initial investment cost; the reliability and economy of the permanent magnet linear motor traction system are improved; the current circulation problem is fundamentally solved, thus avoiding the traction equipment over-current risk caused by the current circulation problem, improving the safety of the traction system and reducing the operation energy consumption of the traction system under the working condition of idle running.
Description
technical field [0001] The invention belongs to the technical field of motor drive and control, and in particular relates to an asymmetrical permanent magnet linear motor traction system for urban rail transit. Background technique [0002] Urban rail transit traction system is a multi-motor drive system. For rail transit traction systems, its control modes can generally be divided into the following three types: [0003] (1) Vehicle control: one traction converter controls all parallel motors in one motor vehicle; [0004] (2) Frame control: one traction converter controls all parallel motors on one bogie; [0005] (3) Shaft control: one traction converter only controls one traction motor. [0006] In the urban rail transit traction system, the increase in the number of traction equipment will bring the following adverse effects: take up more space at the bottom of the vehicle; increase the weight of the train, thereby increasing the energy consumption of the train; incr...
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IPC IPC(8): H02P25/064B60L15/20
CPCB60L15/20H02P25/06Y02T10/64Y02T10/72
Inventor王伟冯亚南程明花为
OwnerSOUTHEAST UNIV